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c0274f38 ER |
1 | ;;; files.el --- file input and output commands for Emacs |
2 | ||
aaef169d TTN |
3 | ;; Copyright (C) 1985, 1986, 1987, 1992, 1993, 1994, 1995, 1996, |
4 | ;; 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, | |
d7a0267c | 5 | ;; 2006, 2007 Free Software Foundation, Inc. |
b4da00e9 | 6 | |
3a801d0c ER |
7 | ;; Maintainer: FSF |
8 | ||
b4da00e9 RM |
9 | ;; This file is part of GNU Emacs. |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
b4da00e9 RM |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
693f800d | 22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
086add15 LK |
23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | ;; Boston, MA 02110-1301, USA. | |
b4da00e9 | 25 | |
e41b2db1 ER |
26 | ;;; Commentary: |
27 | ||
28 | ;; Defines most of Emacs's file- and directory-handling functions, | |
29 | ;; including basic file visiting, backup generation, link handling, | |
30 | ;; ITS-id version control, load- and write-hook handling, and the like. | |
31 | ||
e5167999 ER |
32 | ;;; Code: |
33 | ||
26138670 JB |
34 | (defvar font-lock-keywords) |
35 | ||
36 | ||
21540597 RS |
37 | (defgroup backup nil |
38 | "Backups of edited data files." | |
2a9fe1e2 | 39 | :group 'files) |
b4da00e9 | 40 | |
21540597 | 41 | (defgroup find-file nil |
2a9fe1e2 RS |
42 | "Finding files." |
43 | :group 'files) | |
21540597 RS |
44 | |
45 | ||
46 | (defcustom delete-auto-save-files t | |
ba83982b | 47 | "Non-nil means delete auto-save file when a buffer is saved or killed. |
92631216 | 48 | |
564af258 | 49 | Note that the auto-save file will not be deleted if the buffer is killed |
92631216 | 50 | when it has unsaved changes." |
21540597 RS |
51 | :type 'boolean |
52 | :group 'auto-save) | |
53 | ||
54 | (defcustom directory-abbrev-alist | |
b4da00e9 | 55 | nil |
ba83982b | 56 | "Alist of abbreviations for file directories. |
b4da00e9 RM |
57 | A list of elements of the form (FROM . TO), each meaning to replace |
58 | FROM with TO when it appears in a directory name. This replacement is | |
59 | done when setting up the default directory of a newly visited file. | |
60 | *Every* FROM string should start with `^'. | |
61 | ||
65151a1b RS |
62 | Do not use `~' in the TO strings. |
63 | They should be ordinary absolute directory names. | |
64 | ||
b4da00e9 RM |
65 | Use this feature when you have directories which you normally refer to |
66 | via absolute symbolic links. Make TO the name of the link, and FROM | |
21540597 RS |
67 | the name it is linked to." |
68 | :type '(repeat (cons :format "%v" | |
69 | :value ("" . "") | |
70 | (regexp :tag "From") | |
71 | (regexp :tag "To"))) | |
72 | :group 'abbrev | |
73 | :group 'find-file) | |
b4da00e9 | 74 | |
5c6d31a4 | 75 | ;; Turn off backup files on VMS since it has version numbers. |
21540597 | 76 | (defcustom make-backup-files (not (eq system-type 'vax-vms)) |
ba83982b | 77 | "Non-nil means make a backup of a file the first time it is saved. |
b4da00e9 RM |
78 | This can be done by renaming the file or by copying. |
79 | ||
80 | Renaming means that Emacs renames the existing file so that it is a | |
81 | backup file, then writes the buffer into a new file. Any other names | |
82 | that the old file had will now refer to the backup file. The new file | |
83 | is owned by you and its group is defaulted. | |
84 | ||
85 | Copying means that Emacs copies the existing file into the backup | |
86 | file, then writes the buffer on top of the existing file. Any other | |
87 | names that the old file had will now refer to the new (edited) file. | |
88 | The file's owner and group are unchanged. | |
89 | ||
90 | The choice of renaming or copying is controlled by the variables | |
ffc0e1ca AS |
91 | `backup-by-copying', `backup-by-copying-when-linked', |
92 | `backup-by-copying-when-mismatch' and | |
93 | `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'." | |
21540597 RS |
94 | :type 'boolean |
95 | :group 'backup) | |
b4da00e9 RM |
96 | |
97 | ;; Do this so that local variables based on the file name | |
98 | ;; are not overridden by the major mode. | |
99 | (defvar backup-inhibited nil | |
f862241d RS |
100 | "Non-nil means don't make a backup, regardless of the other parameters. |
101 | This variable is intended for use by making it local to a buffer. | |
102 | But it is local only if you make it local.") | |
b4da00e9 RM |
103 | (put 'backup-inhibited 'permanent-local t) |
104 | ||
21540597 | 105 | (defcustom backup-by-copying nil |
ba83982b | 106 | "Non-nil means always use copying to create backup files. |
21540597 RS |
107 | See documentation of variable `make-backup-files'." |
108 | :type 'boolean | |
109 | :group 'backup) | |
b4da00e9 | 110 | |
21540597 | 111 | (defcustom backup-by-copying-when-linked nil |
ba83982b | 112 | "Non-nil means use copying to create backups for files with multiple names. |
b4da00e9 | 113 | This causes the alternate names to refer to the latest version as edited. |
21540597 RS |
114 | This variable is relevant only if `backup-by-copying' is nil." |
115 | :type 'boolean | |
116 | :group 'backup) | |
b4da00e9 | 117 | |
21540597 | 118 | (defcustom backup-by-copying-when-mismatch nil |
ba83982b | 119 | "Non-nil means create backups by copying if this preserves owner or group. |
b4da00e9 RM |
120 | Renaming may still be used (subject to control of other variables) |
121 | when it would not result in changing the owner or group of the file; | |
122 | that is, for files which are owned by you and whose group matches | |
123 | the default for a new file created there by you. | |
21540597 RS |
124 | This variable is relevant only if `backup-by-copying' is nil." |
125 | :type 'boolean | |
126 | :group 'backup) | |
b4da00e9 | 127 | |
ffc0e1ca | 128 | (defcustom backup-by-copying-when-privileged-mismatch 200 |
ba83982b | 129 | "Non-nil means create backups by copying to preserve a privileged owner. |
ffc0e1ca AS |
130 | Renaming may still be used (subject to control of other variables) |
131 | when it would not result in changing the owner of the file or if the owner | |
132 | has a user id greater than the value of this variable. This is useful | |
133 | when low-numbered uid's are used for special system users (such as root) | |
134 | that must maintain ownership of certain files. | |
135 | This variable is relevant only if `backup-by-copying' and | |
136 | `backup-by-copying-when-mismatch' are nil." | |
137 | :type '(choice (const nil) integer) | |
138 | :group 'backup) | |
139 | ||
ffc0e1ca | 140 | (defvar backup-enable-predicate 'normal-backup-enable-predicate |
b4da00e9 | 141 | "Predicate that looks at a file name and decides whether to make backups. |
37193ee6 | 142 | Called with an absolute file name as argument, it returns t to enable backup.") |
b4da00e9 | 143 | |
21540597 | 144 | (defcustom buffer-offer-save nil |
ba83982b | 145 | "Non-nil in a buffer means always offer to save buffer on exit. |
ffc0e1ca | 146 | Do so even if the buffer is not visiting a file. |
21540597 RS |
147 | Automatically local in all buffers." |
148 | :type 'boolean | |
149 | :group 'backup) | |
b4da00e9 RM |
150 | (make-variable-buffer-local 'buffer-offer-save) |
151 | ||
21540597 | 152 | (defcustom find-file-existing-other-name t |
ba83982b | 153 | "Non-nil means find a file under alternative names, in existing buffers. |
f3e23606 | 154 | This means if any existing buffer is visiting the file you want |
21540597 RS |
155 | under another name, you get the existing buffer instead of a new buffer." |
156 | :type 'boolean | |
157 | :group 'find-file) | |
f3e23606 | 158 | |
21540597 | 159 | (defcustom find-file-visit-truename nil |
f3e23606 RS |
160 | "*Non-nil means visit a file under its truename. |
161 | The truename of a file is found by chasing all links | |
21540597 RS |
162 | both at the file level and at the levels of the containing directories." |
163 | :type 'boolean | |
164 | :group 'find-file) | |
631c8020 | 165 | (put 'find-file-visit-truename 'safe-local-variable 'boolean) |
f3e23606 | 166 | |
26b9ecbc | 167 | (defcustom revert-without-query nil |
ba83982b | 168 | "Specify which files should be reverted without query. |
ebeb898f RS |
169 | The value is a list of regular expressions. |
170 | If the file name matches one of these regular expressions, | |
db8c4866 | 171 | then `revert-buffer' reverts the file without querying |
21540597 | 172 | if the file has changed on disk and you have not edited the buffer." |
a0d809f2 | 173 | :type '(repeat regexp) |
21540597 | 174 | :group 'find-file) |
ebeb898f | 175 | |
f3e23606 RS |
176 | (defvar buffer-file-number nil |
177 | "The device number and file number of the file visited in the current buffer. | |
178 | The value is a list of the form (FILENUM DEVNUM). | |
179 | This pair of numbers uniquely identifies the file. | |
180 | If the buffer is visiting a new file, the value is nil.") | |
181 | (make-variable-buffer-local 'buffer-file-number) | |
182 | (put 'buffer-file-number 'permanent-local t) | |
183 | ||
de88363f | 184 | (defvar buffer-file-numbers-unique (not (memq system-type '(windows-nt))) |
26b9ecbc | 185 | "Non-nil means that `buffer-file-number' uniquely identifies files.") |
de88363f | 186 | |
e554eeb7 RS |
187 | (defvar buffer-file-read-only nil |
188 | "Non-nil if visited file was read-only when visited.") | |
189 | (make-variable-buffer-local 'buffer-file-read-only) | |
190 | ||
388d6ab5 | 191 | (defcustom temporary-file-directory |
eb61b61b RS |
192 | (file-name-as-directory |
193 | (cond ((memq system-type '(ms-dos windows-nt)) | |
194 | (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp")) | |
195 | ((memq system-type '(vax-vms axp-vms)) | |
196 | (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:")) | |
197 | (t | |
198 | (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp")))) | |
388d6ab5 RS |
199 | "The directory for writing temporary files." |
200 | :group 'files | |
201 | :type 'directory) | |
eb61b61b | 202 | |
388d6ab5 | 203 | (defcustom small-temporary-file-directory |
eb61b61b RS |
204 | (if (eq system-type 'ms-dos) (getenv "TMPDIR")) |
205 | "The directory for writing small temporary files. | |
206 | If non-nil, this directory is used instead of `temporary-file-directory' | |
207 | by programs that create small temporary files. This is for systems that | |
388d6ab5 RS |
208 | have fast storage with limited space, such as a RAM disk." |
209 | :group 'files | |
bab6eadb | 210 | :type '(choice (const nil) directory)) |
eb61b61b RS |
211 | |
212 | ;; The system null device. (Should reference NULL_DEVICE from C.) | |
213 | (defvar null-device "/dev/null" "The system null device.") | |
214 | ||
30966847 EZ |
215 | (defvar file-name-invalid-regexp |
216 | (cond ((and (eq system-type 'ms-dos) (not (msdos-long-file-names))) | |
9959c16e | 217 | (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive |
30966847 | 218 | "[+, ;=|<>\"?*]\\|\\[\\|\\]\\|" ; invalid characters |
edfc7f25 | 219 | "[\000-\031]\\|" ; control characters |
30966847 EZ |
220 | "\\(/\\.\\.?[^/]\\)\\|" ; leading dots |
221 | "\\(/[^/.]+\\.[^/.]*\\.\\)")) ; more than a single dot | |
c60ee5e7 | 222 | ((memq system-type '(ms-dos windows-nt cygwin)) |
9959c16e | 223 | (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive |
106a57a4 | 224 | "[|<>\"?*\000-\031]")) ; invalid characters |
30966847 EZ |
225 | (t "[\000]")) |
226 | "Regexp recognizing file names which aren't allowed by the filesystem.") | |
227 | ||
21540597 | 228 | (defcustom file-precious-flag nil |
ba83982b | 229 | "Non-nil means protect against I/O errors while saving files. |
560f4415 | 230 | Some modes set this non-nil in particular buffers. |
4b7271c1 KH |
231 | |
232 | This feature works by writing the new contents into a temporary file | |
233 | and then renaming the temporary file to replace the original. | |
234 | In this way, any I/O error in writing leaves the original untouched, | |
235 | and there is never any instant where the file is nonexistent. | |
236 | ||
237 | Note that this feature forces backups to be made by copying. | |
560f4415 | 238 | Yet, at the same time, saving a precious file |
21540597 RS |
239 | breaks any hard links between it and other files." |
240 | :type 'boolean | |
241 | :group 'backup) | |
b4da00e9 | 242 | |
21540597 | 243 | (defcustom version-control nil |
ba83982b | 244 | "Control use of version numbers for backup files. |
93e7eeb4 JB |
245 | When t, make numeric backup versions unconditionally. |
246 | When nil, make them for files that have some already. | |
247 | The value `never' means do not make them." | |
e48807d1 AS |
248 | :type '(choice (const :tag "Never" never) |
249 | (const :tag "If existing" nil) | |
250 | (other :tag "Always" t)) | |
21540597 RS |
251 | :group 'backup |
252 | :group 'vc) | |
e48335de RS |
253 | (put 'version-control 'safe-local-variable |
254 | '(lambda (x) (or (booleanp x) (equal x 'never)))) | |
21540597 RS |
255 | |
256 | (defcustom dired-kept-versions 2 | |
ba83982b | 257 | "When cleaning directory, number of versions to keep." |
21540597 RS |
258 | :type 'integer |
259 | :group 'backup | |
260 | :group 'dired) | |
261 | ||
262 | (defcustom delete-old-versions nil | |
ba83982b | 263 | "If t, delete excess backup versions silently. |
21540597 RS |
264 | If nil, ask confirmation. Any other value prevents any trimming." |
265 | :type '(choice (const :tag "Delete" t) | |
266 | (const :tag "Ask" nil) | |
e48807d1 | 267 | (other :tag "Leave" other)) |
21540597 RS |
268 | :group 'backup) |
269 | ||
270 | (defcustom kept-old-versions 2 | |
ba83982b | 271 | "Number of oldest versions to keep when a new numbered backup is made." |
21540597 RS |
272 | :type 'integer |
273 | :group 'backup) | |
631c8020 | 274 | (put 'kept-old-versions 'safe-local-variable 'integerp) |
21540597 RS |
275 | |
276 | (defcustom kept-new-versions 2 | |
ba83982b | 277 | "Number of newest versions to keep when a new numbered backup is made. |
21540597 RS |
278 | Includes the new backup. Must be > 0" |
279 | :type 'integer | |
280 | :group 'backup) | |
631c8020 | 281 | (put 'kept-new-versions 'safe-local-variable 'integerp) |
b4da00e9 | 282 | |
21540597 | 283 | (defcustom require-final-newline nil |
ba83982b | 284 | "Whether to add a newline automatically at the end of the file. |
f4206092 RS |
285 | |
286 | A value of t means do this only when the file is about to be saved. | |
287 | A value of `visit' means do this right after the file is visited. | |
288 | A value of `visit-save' means do it at both of those times. | |
289 | Any other non-nil value means ask user whether to add a newline, when saving. | |
290 | nil means don't add newlines. | |
291 | ||
292 | Certain major modes set this locally to the value obtained | |
293 | from `mode-require-final-newline'." | |
294 | :type '(choice (const :tag "When visiting" visit) | |
295 | (const :tag "When saving" t) | |
296 | (const :tag "When visiting or saving" visit-save) | |
93d1963d | 297 | (const :tag "Don't add newlines" nil) |
0776da52 | 298 | (other :tag "Ask each time" ask)) |
21540597 | 299 | :group 'editing-basics) |
b4da00e9 | 300 | |
f4206092 | 301 | (defcustom mode-require-final-newline t |
ba83982b | 302 | "Whether to add a newline at end of file, in certain major modes. |
f4206092 | 303 | Those modes set `require-final-newline' to this value when you enable them. |
0776da52 | 304 | They do so because they are often used for files that are supposed |
f4206092 RS |
305 | to end in newlines, and the question is how to arrange that. |
306 | ||
307 | A value of t means do this only when the file is about to be saved. | |
308 | A value of `visit' means do this right after the file is visited. | |
309 | A value of `visit-save' means do it at both of those times. | |
5e9961be | 310 | Any other non-nil value means ask user whether to add a newline, when saving. |
5e9961be | 311 | |
93d1963d RS |
312 | nil means do not add newlines. That is a risky choice in this variable |
313 | since this value is used for modes for files that ought to have final newlines. | |
314 | So if you set this to nil, you must explicitly check and add | |
315 | a final newline, whenever you save a file that really needs one." | |
f4206092 RS |
316 | :type '(choice (const :tag "When visiting" visit) |
317 | (const :tag "When saving" t) | |
318 | (const :tag "When visiting or saving" visit-save) | |
93d1963d RS |
319 | (const :tag "Don't add newlines" nil) |
320 | (other :tag "Ask each time" ask)) | |
f4206092 | 321 | :group 'editing-basics |
bf247b6e | 322 | :version "22.1") |
f4206092 | 323 | |
21540597 | 324 | (defcustom auto-save-default t |
ba83982b | 325 | "Non-nil says by default do auto-saving of every file-visiting buffer." |
21540597 RS |
326 | :type 'boolean |
327 | :group 'auto-save) | |
b4da00e9 | 328 | |
21540597 | 329 | (defcustom auto-save-visited-file-name nil |
ba83982b | 330 | "Non-nil says auto-save a buffer in the file it is visiting, when practical. |
21540597 RS |
331 | Normally auto-save files are written under other names." |
332 | :type 'boolean | |
333 | :group 'auto-save) | |
b4da00e9 | 334 | |
ffc0e1ca | 335 | (defcustom auto-save-file-name-transforms |
b1e5937c | 336 | `(("\\`/[^/]*:\\([^/]*/\\)*\\([^/]*\\)\\'" |
747981b0 EZ |
337 | ;; Don't put "\\2" inside expand-file-name, since it will be |
338 | ;; transformed to "/2" on DOS/Windows. | |
a0b60c33 | 339 | ,(concat temporary-file-directory "\\2") t)) |
ba83982b | 340 | "Transforms to apply to buffer file name before making auto-save file name. |
a0b60c33 | 341 | Each transform is a list (REGEXP REPLACEMENT UNIQUIFY): |
ffc0e1ca AS |
342 | REGEXP is a regular expression to match against the file name. |
343 | If it matches, `replace-match' is used to replace the | |
344 | matching part with REPLACEMENT. | |
a0b60c33 | 345 | If the optional element UNIQUIFY is non-nil, the auto-save file name is |
36236b72 | 346 | constructed by taking the directory part of the replaced file-name, |
a0b60c33 GM |
347 | concatenated with the buffer file name with all directory separators |
348 | changed to `!' to prevent clashes. This will not work | |
349 | correctly if your filesystem truncates the resulting name. | |
350 | ||
ffc0e1ca AS |
351 | All the transforms in the list are tried, in the order they are listed. |
352 | When one transform applies, its result is final; | |
353 | no further transforms are tried. | |
354 | ||
a2899d6c KG |
355 | The default value is set up to put the auto-save file into the |
356 | temporary directory (see the variable `temporary-file-directory') for | |
a0b60c33 GM |
357 | editing a remote file. |
358 | ||
359 | On MS-DOS filesystems without long names this variable is always | |
360 | ignored." | |
ffc0e1ca | 361 | :group 'auto-save |
a0b60c33 GM |
362 | :type '(repeat (list (string :tag "Regexp") (string :tag "Replacement") |
363 | (boolean :tag "Uniquify"))) | |
ffc0e1ca AS |
364 | :version "21.1") |
365 | ||
88b36776 | 366 | (defcustom save-abbrevs t |
ba83982b | 367 | "Non-nil means save word abbrevs too when files are saved. |
02c6a1cc EZ |
368 | If `silently', don't ask the user before saving." |
369 | :type '(choice (const t) (const nil) (const silently)) | |
21540597 | 370 | :group 'abbrev) |
b4da00e9 | 371 | |
21540597 | 372 | (defcustom find-file-run-dired t |
ba83982b | 373 | "Non-nil means allow `find-file' to visit directories. |
ffc0e1ca | 374 | To visit the directory, `find-file' runs `find-directory-functions'." |
21540597 RS |
375 | :type 'boolean |
376 | :group 'find-file) | |
b4da00e9 | 377 | |
ffc0e1ca | 378 | (defcustom find-directory-functions '(cvs-dired-noselect dired-noselect) |
ba83982b | 379 | "List of functions to try in sequence to visit a directory. |
ffc0e1ca AS |
380 | Each function is called with the directory name as the sole argument |
381 | and should return either a buffer or nil." | |
382 | :type '(hook :options (cvs-dired-noselect dired-noselect)) | |
383 | :group 'find-file) | |
384 | ||
92966e6f RS |
385 | ;;;It is not useful to make this a local variable. |
386 | ;;;(put 'find-file-not-found-hooks 'permanent-local t) | |
0370fe77 | 387 | (defvar find-file-not-found-functions nil |
b4da00e9 RM |
388 | "List of functions to be called for `find-file' on nonexistent file. |
389 | These functions are called as soon as the error is detected. | |
ffc0e1ca | 390 | Variable `buffer-file-name' is already set up. |
b4da00e9 | 391 | The functions are called in the order given until one of them returns non-nil.") |
26b9ecbc JB |
392 | (define-obsolete-variable-alias 'find-file-not-found-hooks |
393 | 'find-file-not-found-functions "22.1") | |
b4da00e9 | 394 | |
92966e6f RS |
395 | ;;;It is not useful to make this a local variable. |
396 | ;;;(put 'find-file-hooks 'permanent-local t) | |
564af258 | 397 | (defcustom find-file-hook nil |
b4da00e9 RM |
398 | "List of functions to be called after a buffer is loaded from a file. |
399 | The buffer's local variables (if any) will have been processed before the | |
564af258 DL |
400 | functions are called." |
401 | :group 'find-file | |
402 | :type 'hook | |
403 | :options '(auto-insert) | |
bf247b6e | 404 | :version "22.1") |
26b9ecbc | 405 | (define-obsolete-variable-alias 'find-file-hooks 'find-file-hook "22.1") |
b4da00e9 | 406 | |
0370fe77 | 407 | (defvar write-file-functions nil |
b4da00e9 RM |
408 | "List of functions to be called before writing out a buffer to a file. |
409 | If one of them returns non-nil, the file is considered already written | |
8c0e7b73 JB |
410 | and the rest are not called. |
411 | These hooks are considered to pertain to the visited file. | |
0370fe77 SM |
412 | So any buffer-local binding of this variable is discarded if you change |
413 | the visited file name with \\[set-visited-file-name], but not when you | |
414 | change the major mode. | |
415 | ||
0eb0202f LT |
416 | This hook is not run if any of the functions in |
417 | `write-contents-functions' returns non-nil. Both hooks pertain | |
418 | to how to save a buffer to file, for instance, choosing a suitable | |
419 | coding system and setting mode bits. (See Info | |
420 | node `(elisp)Saving Buffers'.) To perform various checks or | |
26b9ecbc | 421 | updates before the buffer is saved, use `before-save-hook'.") |
0370fe77 | 422 | (put 'write-file-functions 'permanent-local t) |
26b9ecbc | 423 | (define-obsolete-variable-alias 'write-file-hooks 'write-file-functions "22.1") |
0370fe77 SM |
424 | |
425 | (defvar local-write-file-hooks nil) | |
b19f1da4 BF |
426 | (make-variable-buffer-local 'local-write-file-hooks) |
427 | (put 'local-write-file-hooks 'permanent-local t) | |
bf247b6e | 428 | (make-obsolete-variable 'local-write-file-hooks 'write-file-functions "22.1") |
8c0e7b73 | 429 | |
0370fe77 | 430 | (defvar write-contents-functions nil |
8c0e7b73 JB |
431 | "List of functions to be called before writing out a buffer to a file. |
432 | If one of them returns non-nil, the file is considered already written | |
7dd11b37 LH |
433 | and the rest are not called and neither are the functions in |
434 | `write-file-functions'. | |
f82966e4 KH |
435 | |
436 | This variable is meant to be used for hooks that pertain to the | |
437 | buffer's contents, not to the particular visited file; thus, | |
438 | `set-visited-file-name' does not clear this variable; but changing the | |
693f800d RS |
439 | major mode does clear it. |
440 | ||
0eb0202f LT |
441 | For hooks that _do_ pertain to the particular visited file, use |
442 | `write-file-functions'. Both this variable and | |
443 | `write-file-functions' relate to how a buffer is saved to file. | |
444 | To perform various checks or updates before the buffer is saved, | |
445 | use `before-save-hook'.") | |
0370fe77 | 446 | (make-variable-buffer-local 'write-contents-functions) |
26b9ecbc JB |
447 | (define-obsolete-variable-alias 'write-contents-hooks |
448 | 'write-contents-functions "22.1") | |
b4da00e9 | 449 | |
21540597 | 450 | (defcustom enable-local-variables t |
ba83982b | 451 | "Control use of local variables in files you visit. |
a5ce12c3 | 452 | The value can be t, nil, :safe, or something else. |
5a6c1d87 CY |
453 | |
454 | A value of t means file local variables specifications are obeyed | |
a251756e RS |
455 | if all the specified variable values are safe; if any values are |
456 | not safe, Emacs queries you, once, whether to set them all. | |
a5ce12c3 RS |
457 | \(When you say yes to certain values, they are remembered as safe.) |
458 | ||
459 | :safe means set the safe variables, and ignore the rest. | |
e58cec15 RS |
460 | :all means set all variables, whether safe or not. |
461 | (Don't set it permanently to :all.) | |
a5ce12c3 | 462 | nil means always ignore the file local variables. |
a251756e | 463 | |
a251756e | 464 | Any other value means always query you once whether to set them all. |
a5ce12c3 RS |
465 | \(When you say yes to certain values, they are remembered as safe, but |
466 | this has no effect when `enable-local-variables' is \"something else\".) | |
5a6c1d87 | 467 | |
aa5fcebf KH |
468 | This variable also controls use of major modes specified in |
469 | a -*- line. | |
b4da00e9 | 470 | |
aa5fcebf KH |
471 | The command \\[normal-mode], when used interactively, |
472 | always obeys file local variable specifications and the -*- line, | |
473 | and ignores this variable." | |
e58cec15 | 474 | :type '(choice (const :tag "Query Unsafe" t) |
a5ce12c3 | 475 | (const :tag "Safe Only" :safe) |
e58cec15 | 476 | (const :tag "Do all" :all) |
21540597 | 477 | (const :tag "Ignore" nil) |
e48807d1 | 478 | (other :tag "Query" other)) |
21540597 | 479 | :group 'find-file) |
b4da00e9 | 480 | |
da09b92b RS |
481 | (defvar local-enable-local-variables t |
482 | "Like `enable-local-variables' but meant for buffer-local bindings. | |
aa5fcebf | 483 | The meaningful values are nil and non-nil. The default is non-nil. |
da09b92b | 484 | If a major mode sets this to nil, buffer-locally, then any local |
aa5fcebf KH |
485 | variables list in the file will be ignored. |
486 | ||
487 | This variable does not affect the use of major modes | |
488 | specified in a -*- line.") | |
da09b92b | 489 | |
21540597 | 490 | (defcustom enable-local-eval 'maybe |
e442c62b | 491 | "Control processing of the \"variable\" `eval' in a file's local variables. |
d207b766 RS |
492 | The value can be t, nil or something else. |
493 | A value of t means obey `eval' variables; | |
e0b2a2d9 | 494 | nil means ignore them; anything else means query." |
21540597 RS |
495 | :type '(choice (const :tag "Obey" t) |
496 | (const :tag "Ignore" nil) | |
e48807d1 | 497 | (other :tag "Query" other)) |
21540597 | 498 | :group 'find-file) |
b4da00e9 RM |
499 | |
500 | ;; Avoid losing in versions where CLASH_DETECTION is disabled. | |
501 | (or (fboundp 'lock-buffer) | |
231c4e10 | 502 | (defalias 'lock-buffer 'ignore)) |
b4da00e9 | 503 | (or (fboundp 'unlock-buffer) |
231c4e10 | 504 | (defalias 'unlock-buffer 'ignore)) |
a7305f6e RS |
505 | (or (fboundp 'file-locked-p) |
506 | (defalias 'file-locked-p 'ignore)) | |
93fe0a35 | 507 | |
cb211eb2 | 508 | (defcustom view-read-only nil |
ba83982b | 509 | "Non-nil means buffers visiting files read-only do so in view mode. |
4c91443d RS |
510 | In fact, this means that all read-only buffers normally have |
511 | View mode enabled, including buffers that are read-only because | |
512 | you visit a file you cannot alter, and buffers you make read-only | |
513 | using \\[toggle-read-only]." | |
cb211eb2 SM |
514 | :type 'boolean |
515 | :group 'view) | |
2a9fe1e2 | 516 | |
5c471b12 RS |
517 | (defvar file-name-history nil |
518 | "History list of file names entered in the minibuffer.") | |
519 | \f | |
1aa8fe46 | 520 | (put 'ange-ftp-completion-hook-function 'safe-magic t) |
93fe0a35 | 521 | (defun ange-ftp-completion-hook-function (op &rest args) |
ffc0e1ca AS |
522 | "Provides support for ange-ftp host name completion. |
523 | Runs the usual ange-ftp hook, but only for completion operations." | |
524 | ;; Having this here avoids the need to load ange-ftp when it's not | |
525 | ;; really in use. | |
93fe0a35 RS |
526 | (if (memq op '(file-name-completion file-name-all-completions)) |
527 | (apply 'ange-ftp-hook-function op args) | |
57e81f57 RS |
528 | (let ((inhibit-file-name-handlers |
529 | (cons 'ange-ftp-completion-hook-function | |
530 | (and (eq inhibit-file-name-operation op) | |
531 | inhibit-file-name-handlers))) | |
532 | (inhibit-file-name-operation op)) | |
93fe0a35 | 533 | (apply op args)))) |
567c1ca9 RS |
534 | |
535 | (defun convert-standard-filename (filename) | |
a576d8e2 | 536 | "Convert a standard file's name to something suitable for the OS. |
915b0bf0 JB |
537 | This means to guarantee valid names and perhaps to canonicalize |
538 | certain patterns. | |
539 | ||
f2430a0d SM |
540 | FILENAME should be an absolute file name since the conversion rules |
541 | sometimes vary depending on the position in the file name. E.g. c:/foo | |
542 | is a valid DOS file name, but c:/bar/c:/foo is not. | |
543 | ||
915b0bf0 JB |
544 | This function's standard definition is trivial; it just returns |
545 | the argument. However, on Windows and DOS, replace invalid | |
18b28ef1 EZ |
546 | characters. On DOS, make sure to obey the 8.3 limitations. |
547 | In the native Windows build, turn Cygwin names into native names, | |
548 | and also turn slashes into backslashes if the shell requires it (see | |
a576d8e2 LT |
549 | `w32-shell-dos-semantics'). |
550 | ||
551 | See Info node `(elisp)Standard File Names' for more details." | |
18b28ef1 EZ |
552 | (if (eq system-type 'cygwin) |
553 | (let ((name (copy-sequence filename)) | |
554 | (start 0)) | |
555 | ;; Replace invalid filename characters with ! | |
556 | (while (string-match "[?*:<>|\"\000-\037]" name start) | |
557 | (aset name (match-beginning 0) ?!) | |
558 | (setq start (match-end 0))) | |
559 | name) | |
560 | filename)) | |
5d4d17b8 KS |
561 | |
562 | (defun read-directory-name (prompt &optional dir default-dirname mustmatch initial) | |
563 | "Read directory name, prompting with PROMPT and completing in directory DIR. | |
564 | Value is not expanded---you must call `expand-file-name' yourself. | |
25802eac LT |
565 | Default name to DEFAULT-DIRNAME if user exits with the same |
566 | non-empty string that was inserted by this function. | |
44dce0fb RS |
567 | (If DEFAULT-DIRNAME is omitted, DIR combined with INITIAL is used, |
568 | or just DIR if INITIAL is nil.) | |
25802eac LT |
569 | If the user exits with an empty minibuffer, this function returns |
570 | an empty string. (This can only happen if the user erased the | |
571 | pre-inserted contents or if `insert-default-directory' is nil.) | |
5d4d17b8 KS |
572 | Fourth arg MUSTMATCH non-nil means require existing directory's name. |
573 | Non-nil and non-t means also require confirmation after completion. | |
574 | Fifth arg INITIAL specifies text to start with. | |
25802eac LT |
575 | DIR should be an absolute directory name. It defaults to |
576 | the value of `default-directory'." | |
5d4d17b8 KS |
577 | (unless dir |
578 | (setq dir default-directory)) | |
54005870 | 579 | (read-file-name prompt dir (or default-dirname |
44dce0fb RS |
580 | (if initial (expand-file-name initial dir) |
581 | dir)) | |
582 | mustmatch initial | |
5d4d17b8 KS |
583 | 'file-directory-p)) |
584 | ||
b4da00e9 RM |
585 | \f |
586 | (defun pwd () | |
587 | "Show the current default directory." | |
588 | (interactive nil) | |
589 | (message "Directory %s" default-directory)) | |
590 | ||
231c4e10 ER |
591 | (defvar cd-path nil |
592 | "Value of the CDPATH environment variable, as a list. | |
9ee45b2c | 593 | Not actually set up until the first time you use it.") |
231c4e10 ER |
594 | |
595 | (defun parse-colon-path (cd-path) | |
ae135939 | 596 | "Explode a search path into a list of directory names. |
c5994cfa JB |
597 | Directories are separated by occurrences of `path-separator' |
598 | \(which is colon in GNU and GNU-like systems)." | |
ffc0e1ca | 599 | ;; We could use split-string here. |
231c4e10 | 600 | (and cd-path |
818286f4 | 601 | (let (cd-list (cd-start 0) cd-colon) |
306faa42 RS |
602 | (setq cd-path (concat cd-path path-separator)) |
603 | (while (setq cd-colon (string-match path-separator cd-path cd-start)) | |
231c4e10 | 604 | (setq cd-list |
9daefb36 | 605 | (nconc cd-list |
c52e4104 RS |
606 | (list (if (= cd-start cd-colon) |
607 | nil | |
608 | (substitute-in-file-name | |
e33e80e4 RS |
609 | (file-name-as-directory |
610 | (substring cd-path cd-start cd-colon))))))) | |
231c4e10 ER |
611 | (setq cd-start (+ cd-colon 1))) |
612 | cd-list))) | |
613 | ||
614 | (defun cd-absolute (dir) | |
30c5ce9c | 615 | "Change current directory to given absolute file name DIR." |
f4a0f59b RS |
616 | ;; Put the name into directory syntax now, |
617 | ;; because otherwise expand-file-name may give some bad results. | |
b4da00e9 RM |
618 | (if (not (eq system-type 'vax-vms)) |
619 | (setq dir (file-name-as-directory dir))) | |
f4a0f59b | 620 | (setq dir (abbreviate-file-name (expand-file-name dir))) |
b4da00e9 | 621 | (if (not (file-directory-p dir)) |
83c6f446 RS |
622 | (if (file-exists-p dir) |
623 | (error "%s is not a directory" dir) | |
31c691c1 | 624 | (error "%s: no such directory" dir)) |
b4da00e9 RM |
625 | (if (file-executable-p dir) |
626 | (setq default-directory dir) | |
9daefb36 | 627 | (error "Cannot cd to %s: Permission denied" dir)))) |
b4da00e9 | 628 | |
231c4e10 ER |
629 | (defun cd (dir) |
630 | "Make DIR become the current buffer's default directory. | |
ae135939 JB |
631 | If your environment includes a `CDPATH' variable, try each one of |
632 | that list of directories (separated by occurrences of | |
c5994cfa JB |
633 | `path-separator') when resolving a relative directory name. |
634 | The path separator is colon in GNU and GNU-like systems." | |
dac4ea74 | 635 | (interactive |
5d4d17b8 | 636 | (list (read-directory-name "Change default directory: " |
2121cd9c RM |
637 | default-directory default-directory |
638 | (and (member cd-path '(nil ("./"))) | |
639 | (null (getenv "CDPATH")))))) | |
30c5ce9c RS |
640 | (if (file-name-absolute-p dir) |
641 | (cd-absolute (expand-file-name dir)) | |
642 | (if (null cd-path) | |
643 | (let ((trypath (parse-colon-path (getenv "CDPATH")))) | |
644 | (setq cd-path (or trypath (list "./"))))) | |
645 | (if (not (catch 'found | |
646 | (mapcar | |
647 | (function (lambda (x) | |
648 | (let ((f (expand-file-name (concat x dir)))) | |
649 | (if (file-directory-p f) | |
650 | (progn | |
651 | (cd-absolute f) | |
652 | (throw 'found t)))))) | |
653 | cd-path) | |
654 | nil)) | |
655 | (error "No such directory found via CDPATH environment variable")))) | |
231c4e10 | 656 | |
b4da00e9 RM |
657 | (defun load-file (file) |
658 | "Load the Lisp file named FILE." | |
58195faa DL |
659 | ;; This is a case where .elc makes a lot of sense. |
660 | (interactive (list (let ((completion-ignored-extensions | |
9ab80679 | 661 | (remove ".elc" completion-ignored-extensions))) |
58195faa DL |
662 | (read-file-name "Load file: ")))) |
663 | (load (expand-file-name file) nil nil t)) | |
b4da00e9 | 664 | |
38eea7c7 SM |
665 | (defun locate-file (filename path &optional suffixes predicate) |
666 | "Search for FILENAME through PATH. | |
c7c4bc11 EZ |
667 | If found, return the absolute file name of FILENAME, with its suffixes; |
668 | otherwise return nil. | |
669 | PATH should be a list of directories to look in, like the lists in | |
670 | `exec-path' or `load-path'. | |
38eea7c7 SM |
671 | If SUFFIXES is non-nil, it should be a list of suffixes to append to |
672 | file name when searching. If SUFFIXES is nil, it is equivalent to '(\"\"). | |
c7c4bc11 | 673 | Use '(\"/\") to disable PATH search, but still try the suffixes in SUFFIXES. |
38eea7c7 | 674 | If non-nil, PREDICATE is used instead of `file-readable-p'. |
e6f0ff92 RS |
675 | PREDICATE can also be an integer to pass to the `access' system call, |
676 | in which case file-name handlers are ignored. This usage is deprecated. | |
677 | ||
678 | For compatibility, PREDICATE can also be one of the symbols | |
679 | `executable', `readable', `writable', or `exists', or a list of | |
680 | one or more of those symbols." | |
38eea7c7 SM |
681 | (if (and predicate (symbolp predicate) (not (functionp predicate))) |
682 | (setq predicate (list predicate))) | |
683 | (when (and (consp predicate) (not (functionp predicate))) | |
684 | (setq predicate | |
685 | (logior (if (memq 'executable predicate) 1 0) | |
686 | (if (memq 'writable predicate) 2 0) | |
687 | (if (memq 'readable predicate) 4 0)))) | |
688 | (locate-file-internal filename path suffixes predicate)) | |
689 | ||
690 | (defun locate-file-completion (string path-and-suffixes action) | |
691 | "Do completion for file names passed to `locate-file'. | |
e6ca43c8 | 692 | PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)." |
2c3d8820 | 693 | (if (file-name-absolute-p string) |
38eea7c7 | 694 | (read-file-name-internal string nil action) |
2c3d8820 | 695 | (let ((names nil) |
38eea7c7 | 696 | (suffix (concat (regexp-opt (cdr path-and-suffixes) t) "\\'")) |
2c3d8820 | 697 | (string-dir (file-name-directory string))) |
38eea7c7 | 698 | (dolist (dir (car path-and-suffixes)) |
f2440e42 RS |
699 | (unless dir |
700 | (setq dir default-directory)) | |
2c3d8820 SM |
701 | (if string-dir (setq dir (expand-file-name string-dir dir))) |
702 | (when (file-directory-p dir) | |
703 | (dolist (file (file-name-all-completions | |
704 | (file-name-nondirectory string) dir)) | |
e1cac570 | 705 | (add-to-list 'names (if string-dir (concat string-dir file) file)) |
2c3d8820 SM |
706 | (when (string-match suffix file) |
707 | (setq file (substring file 0 (match-beginning 0))) | |
708 | (push (if string-dir (concat string-dir file) file) names))))) | |
0370fe77 SM |
709 | (cond |
710 | ((eq action t) (all-completions string names)) | |
711 | ((null action) (try-completion string names)) | |
712 | (t (test-completion string names)))))) | |
2c3d8820 | 713 | |
c3f6aa20 SM |
714 | (defun executable-find (command) |
715 | "Search for COMMAND in `exec-path' and return the absolute file name. | |
716 | Return nil if COMMAND is not found anywhere in `exec-path'." | |
717 | ;; Use 1 rather than file-executable-p to better match the behavior of | |
718 | ;; call-process. | |
719 | (locate-file command exec-path exec-suffixes 1)) | |
720 | ||
b4da00e9 RM |
721 | (defun load-library (library) |
722 | "Load the library named LIBRARY. | |
723 | This is an interface to the function `load'." | |
38eea7c7 SM |
724 | (interactive |
725 | (list (completing-read "Load library: " | |
726 | 'locate-file-completion | |
9f6fdbf0 | 727 | (cons load-path (get-load-suffixes))))) |
b4da00e9 | 728 | (load library)) |
5d68c2c2 | 729 | |
ff7affeb | 730 | (defun file-remote-p (file) |
3f788773 KG |
731 | "Test whether FILE specifies a location on a remote system. |
732 | Return an identification of the system if the location is indeed | |
733 | remote. The identification of the system may comprise a method | |
734 | to access the system and its hostname, amongst other things. | |
735 | ||
736 | For example, the filename \"/user@host:/foo\" specifies a location | |
737 | on the system \"/user@host:\"." | |
04621aaa | 738 | (let ((handler (find-file-name-handler file 'file-remote-p))) |
ff7affeb | 739 | (if handler |
04621aaa MA |
740 | (funcall handler 'file-remote-p file) |
741 | nil))) | |
ff7affeb | 742 | |
ffc0e1ca | 743 | (defun file-local-copy (file) |
5d68c2c2 RS |
744 | "Copy the file FILE into a temporary file on this machine. |
745 | Returns the name of the local copy, or nil, if FILE is directly | |
746 | accessible." | |
ffc0e1ca AS |
747 | ;; This formerly had an optional BUFFER argument that wasn't used by |
748 | ;; anything. | |
6eaebaa2 | 749 | (let ((handler (find-file-name-handler file 'file-local-copy))) |
5d68c2c2 RS |
750 | (if handler |
751 | (funcall handler 'file-local-copy file) | |
752 | nil))) | |
f3e23606 | 753 | |
05ef1cda | 754 | (defun file-truename (filename &optional counter prev-dirs) |
f3e23606 RS |
755 | "Return the truename of FILENAME, which should be absolute. |
756 | The truename of a file name is found by chasing symbolic links | |
757 | both at the level of the file and at the level of the directories | |
05ef1cda RS |
758 | containing it, until no links are left at any level. |
759 | ||
89bf74f8 | 760 | \(fn FILENAME)" ;; Don't document the optional arguments. |
b9963e32 JB |
761 | ;; COUNTER and PREV-DIRS are only used in recursive calls. |
762 | ;; COUNTER can be a cons cell whose car is the count of how many | |
763 | ;; more links to chase before getting an error. | |
05ef1cda RS |
764 | ;; PREV-DIRS can be a cons cell whose car is an alist |
765 | ;; of truenames we've just recently computed. | |
f2440e42 RS |
766 | (cond ((or (string= filename "") (string= filename "~")) |
767 | (setq filename (expand-file-name filename)) | |
768 | (if (string= filename "") | |
769 | (setq filename "/"))) | |
770 | ((and (string= (substring filename 0 1) "~") | |
771 | (string-match "~[^/]*/?" filename)) | |
772 | (let ((first-part | |
773 | (substring filename 0 (match-end 0))) | |
774 | (rest (substring filename (match-end 0)))) | |
775 | (setq filename (concat (expand-file-name first-part) rest))))) | |
776 | ||
05ef1cda | 777 | (or counter (setq counter (list 100))) |
b505828b RS |
778 | (let (done |
779 | ;; For speed, remove the ange-ftp completion handler from the list. | |
780 | ;; We know it's not needed here. | |
781 | ;; For even more speed, do this only on the outermost call. | |
782 | (file-name-handler-alist | |
783 | (if prev-dirs file-name-handler-alist | |
784 | (let ((tem (copy-sequence file-name-handler-alist))) | |
785 | (delq (rassq 'ange-ftp-completion-hook-function tem) tem))))) | |
786 | (or prev-dirs (setq prev-dirs (list nil))) | |
b1667e6c GV |
787 | |
788 | ;; andrewi@harlequin.co.uk - none of the following code (except for | |
789 | ;; invoking the file-name handler) currently applies on Windows | |
790 | ;; (ie. there are no native symlinks), but there is an issue with | |
791 | ;; case differences being ignored by the OS, and short "8.3 DOS" | |
792 | ;; name aliases existing for all files. (The short names are not | |
793 | ;; reported by directory-files, but can be used to refer to files.) | |
794 | ;; It seems appropriate for file-truename to resolve these issues in | |
795 | ;; the most natural way, which on Windows is to call the function | |
796 | ;; `w32-long-file-name' - this returns the exact name of a file as | |
797 | ;; it is stored on disk (expanding short name aliases with the full | |
798 | ;; name in the process). | |
799 | (if (eq system-type 'windows-nt) | |
06dd5ef7 | 800 | (let ((handler (find-file-name-handler filename 'file-truename))) |
b1667e6c GV |
801 | ;; For file name that has a special handler, call handler. |
802 | ;; This is so that ange-ftp can save time by doing a no-op. | |
803 | (if handler | |
804 | (setq filename (funcall handler 'file-truename filename)) | |
805 | ;; If filename contains a wildcard, newname will be the old name. | |
06dd5ef7 | 806 | (unless (string-match "[[*?]" filename) |
5b373bd3 JB |
807 | ;; If filename exists, use the long name |
808 | (setq filename (or (w32-long-file-name filename) filename)))) | |
b1667e6c GV |
809 | (setq done t))) |
810 | ||
05ef1cda RS |
811 | ;; If this file directly leads to a link, process that iteratively |
812 | ;; so that we don't use lots of stack. | |
813 | (while (not done) | |
814 | (setcar counter (1- (car counter))) | |
815 | (if (< (car counter) 0) | |
816 | (error "Apparent cycle of symbolic links for %s" filename)) | |
817 | (let ((handler (find-file-name-handler filename 'file-truename))) | |
818 | ;; For file name that has a special handler, call handler. | |
819 | ;; This is so that ange-ftp can save time by doing a no-op. | |
820 | (if handler | |
821 | (setq filename (funcall handler 'file-truename filename) | |
822 | done t) | |
fb145562 | 823 | (let ((dir (or (file-name-directory filename) default-directory)) |
05ef1cda RS |
824 | target dirfile) |
825 | ;; Get the truename of the directory. | |
826 | (setq dirfile (directory-file-name dir)) | |
827 | ;; If these are equal, we have the (or a) root directory. | |
828 | (or (string= dir dirfile) | |
829 | ;; If this is the same dir we last got the truename for, | |
830 | ;; save time--don't recalculate. | |
831 | (if (assoc dir (car prev-dirs)) | |
832 | (setq dir (cdr (assoc dir (car prev-dirs)))) | |
833 | (let ((old dir) | |
834 | (new (file-name-as-directory (file-truename dirfile counter prev-dirs)))) | |
835 | (setcar prev-dirs (cons (cons old new) (car prev-dirs))) | |
836 | (setq dir new)))) | |
837 | (if (equal ".." (file-name-nondirectory filename)) | |
838 | (setq filename | |
839 | (directory-file-name (file-name-directory (directory-file-name dir))) | |
840 | done t) | |
841 | (if (equal "." (file-name-nondirectory filename)) | |
842 | (setq filename (directory-file-name dir) | |
843 | done t) | |
844 | ;; Put it back on the file name. | |
845 | (setq filename (concat dir (file-name-nondirectory filename))) | |
846 | ;; Is the file name the name of a link? | |
847 | (setq target (file-symlink-p filename)) | |
848 | (if target | |
849 | ;; Yes => chase that link, then start all over | |
850 | ;; since the link may point to a directory name that uses links. | |
851 | ;; We can't safely use expand-file-name here | |
852 | ;; since target might look like foo/../bar where foo | |
853 | ;; is itself a link. Instead, we handle . and .. above. | |
854 | (setq filename | |
855 | (if (file-name-absolute-p target) | |
856 | target | |
857 | (concat dir target)) | |
858 | done nil) | |
859 | ;; No, we are done! | |
860 | (setq done t)))))))) | |
861 | filename)) | |
5dbfdacd | 862 | |
302fcc98 | 863 | (defun file-chase-links (filename &optional limit) |
5dadeb29 | 864 | "Chase links in FILENAME until a name that is not a link. |
302fcc98 RS |
865 | Unlike `file-truename', this does not check whether a parent |
866 | directory name is a symbolic link. | |
867 | If the optional argument LIMIT is a number, | |
868 | it means chase no more than that many links and then stop." | |
869 | (let (tem (newname filename) | |
92464ae6 | 870 | (count 0)) |
302fcc98 RS |
871 | (while (and (or (null limit) (< count limit)) |
872 | (setq tem (file-symlink-p newname))) | |
9695aac6 | 873 | (save-match-data |
92464ae6 | 874 | (if (and (null limit) (= count 100)) |
9695aac6 RS |
875 | (error "Apparent cycle of symbolic links for %s" filename)) |
876 | ;; In the context of a link, `//' doesn't mean what Emacs thinks. | |
877 | (while (string-match "//+" tem) | |
878 | (setq tem (replace-match "/" nil nil tem))) | |
879 | ;; Handle `..' by hand, since it needs to work in the | |
880 | ;; target of any directory symlink. | |
881 | ;; This code is not quite complete; it does not handle | |
882 | ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose. | |
883 | (while (string-match "\\`\\.\\./" tem) | |
884 | (setq tem (substring tem 3)) | |
885 | (setq newname (expand-file-name newname)) | |
886 | ;; Chase links in the default dir of the symlink. | |
887 | (setq newname | |
888 | (file-chase-links | |
889 | (directory-file-name (file-name-directory newname)))) | |
890 | ;; Now find the parent of that dir. | |
891 | (setq newname (file-name-directory newname))) | |
892 | (setq newname (expand-file-name tem (file-name-directory newname))) | |
92464ae6 | 893 | (setq count (1+ count)))) |
5dadeb29 | 894 | newname)) |
9bdbd98e | 895 | |
9e8bb7f7 RS |
896 | (defun make-temp-file (prefix &optional dir-flag suffix) |
897 | "Create a temporary file. | |
898 | The returned file name (created by appending some random characters at the end | |
899 | of PREFIX, and expanding against `temporary-file-directory' if necessary), | |
900 | is guaranteed to point to a newly created empty file. | |
901 | You can then use `write-region' to write new data into the file. | |
902 | ||
903 | If DIR-FLAG is non-nil, create a new empty directory instead of a file. | |
904 | ||
905 | If SUFFIX is non-nil, add that at the end of the file name." | |
906 | (let ((umask (default-file-modes)) | |
907 | file) | |
908 | (unwind-protect | |
909 | (progn | |
910 | ;; Create temp files with strict access rights. It's easy to | |
911 | ;; loosen them later, whereas it's impossible to close the | |
912 | ;; time-window of loose permissions otherwise. | |
913 | (set-default-file-modes ?\700) | |
914 | (while (condition-case () | |
915 | (progn | |
916 | (setq file | |
917 | (make-temp-name | |
918 | (expand-file-name prefix temporary-file-directory))) | |
919 | (if suffix | |
920 | (setq file (concat file suffix))) | |
921 | (if dir-flag | |
922 | (make-directory file) | |
923 | (write-region "" nil file nil 'silent nil 'excl)) | |
924 | nil) | |
925 | (file-already-exists t)) | |
926 | ;; the file was somehow created by someone else between | |
927 | ;; `make-temp-name' and `write-region', let's try again. | |
928 | nil) | |
929 | file) | |
930 | ;; Reset the umask. | |
931 | (set-default-file-modes umask)))) | |
932 | ||
9bdbd98e KH |
933 | (defun recode-file-name (file coding new-coding &optional ok-if-already-exists) |
934 | "Change the encoding of FILE's name from CODING to NEW-CODING. | |
935 | The value is a new name of FILE. | |
936 | Signals a `file-already-exists' error if a file of the new name | |
26b9ecbc JB |
937 | already exists unless optional fourth argument OK-IF-ALREADY-EXISTS |
938 | is non-nil. A number as fourth arg means request confirmation if | |
9bdbd98e KH |
939 | the new name already exists. This is what happens in interactive |
940 | use with M-x." | |
941 | (interactive | |
942 | (let ((default-coding (or file-name-coding-system | |
943 | default-file-name-coding-system)) | |
944 | (filename (read-file-name "Recode filename: " nil nil t)) | |
945 | from-coding to-coding) | |
946 | (if (and default-coding | |
947 | ;; We provide the default coding only when it seems that | |
948 | ;; the filename is correctly decoded by the default | |
949 | ;; coding. | |
950 | (let ((charsets (find-charset-string filename))) | |
951 | (and (not (memq 'eight-bit-control charsets)) | |
952 | (not (memq 'eight-bit-graphic charsets))))) | |
953 | (setq from-coding (read-coding-system | |
954 | (format "Recode filename %s from (default %s): " | |
955 | filename default-coding) | |
956 | default-coding)) | |
957 | (setq from-coding (read-coding-system | |
958 | (format "Recode filename %s from: " filename)))) | |
cdec2ad7 | 959 | |
9bdbd98e KH |
960 | ;; We provide the default coding only when a user is going to |
961 | ;; change the encoding not from the default coding. | |
962 | (if (eq from-coding default-coding) | |
963 | (setq to-coding (read-coding-system | |
964 | (format "Recode filename %s from %s to: " | |
965 | filename from-coding))) | |
966 | (setq to-coding (read-coding-system | |
967 | (format "Recode filename %s from %s to (default %s): " | |
968 | filename from-coding default-coding) | |
969 | default-coding))) | |
970 | (list filename from-coding to-coding))) | |
971 | ||
972 | (let* ((default-coding (or file-name-coding-system | |
973 | default-file-name-coding-system)) | |
974 | ;; FILE should have been decoded by DEFAULT-CODING. | |
975 | (encoded (encode-coding-string file default-coding)) | |
976 | (newname (decode-coding-string encoded coding)) | |
977 | (new-encoded (encode-coding-string newname new-coding)) | |
978 | ;; Suppress further encoding. | |
979 | (file-name-coding-system nil) | |
980 | (default-file-name-coding-system nil) | |
981 | (locale-coding-system nil)) | |
982 | (rename-file encoded new-encoded ok-if-already-exists) | |
983 | newname)) | |
b4da00e9 | 984 | \f |
467ff692 RS |
985 | (defun switch-to-buffer-other-window (buffer &optional norecord) |
986 | "Select buffer BUFFER in another window. | |
839857c7 LT |
987 | If BUFFER does not identify an existing buffer, then this function |
988 | creates a buffer with that name. | |
989 | ||
990 | When called from Lisp, BUFFER can be a buffer, a string \(a buffer name), | |
991 | or nil. If BUFFER is nil, then this function chooses a buffer | |
992 | using `other-buffer'. | |
467ff692 | 993 | Optional second arg NORECORD non-nil means |
4c6a4739 | 994 | do not put this buffer at the front of the list of recently selected ones. |
839857c7 | 995 | This function returns the buffer it switched to. |
4c6a4739 EZ |
996 | |
997 | This uses the function `display-buffer' as a subroutine; see its | |
998 | documentation for additional customization information." | |
b4da00e9 | 999 | (interactive "BSwitch to buffer in other window: ") |
cf44b9b7 RS |
1000 | (let ((pop-up-windows t) |
1001 | ;; Don't let these interfere. | |
1002 | same-window-buffer-names same-window-regexps) | |
467ff692 | 1003 | (pop-to-buffer buffer t norecord))) |
b4da00e9 | 1004 | |
467ff692 RS |
1005 | (defun switch-to-buffer-other-frame (buffer &optional norecord) |
1006 | "Switch to buffer BUFFER in another frame. | |
1007 | Optional second arg NORECORD non-nil means | |
4c6a4739 EZ |
1008 | do not put this buffer at the front of the list of recently selected ones. |
1009 | ||
1010 | This uses the function `display-buffer' as a subroutine; see its | |
1011 | documentation for additional customization information." | |
f98955ea | 1012 | (interactive "BSwitch to buffer in other frame: ") |
cf44b9b7 RS |
1013 | (let ((pop-up-frames t) |
1014 | same-window-buffer-names same-window-regexps) | |
467ff692 | 1015 | (pop-to-buffer buffer t norecord) |
336b7f41 | 1016 | (raise-frame (window-frame (selected-window))))) |
5bbbceb1 | 1017 | |
ab9b3866 RS |
1018 | (defun display-buffer-other-frame (buffer) |
1019 | "Switch to buffer BUFFER in another frame. | |
1020 | This uses the function `display-buffer' as a subroutine; see its | |
1021 | documentation for additional customization information." | |
1022 | (interactive "BDisplay buffer in other frame: ") | |
1023 | (let ((pop-up-frames t) | |
1024 | same-window-buffer-names same-window-regexps | |
1025 | (old-window (selected-window)) | |
1026 | new-window) | |
1027 | (setq new-window (display-buffer buffer t)) | |
1028 | (lower-frame (window-frame new-window)) | |
1029 | (make-frame-invisible (window-frame old-window)) | |
1030 | (make-frame-visible (window-frame old-window)))) | |
1031 | ||
a49a58f9 RS |
1032 | (defvar find-file-default nil |
1033 | "Used within `find-file-read-args'.") | |
1034 | ||
a42e7db0 SM |
1035 | (defmacro minibuffer-with-setup-hook (fun &rest body) |
1036 | "Add FUN to `minibuffer-setup-hook' while executing BODY. | |
1037 | BODY should use the minibuffer at most once. | |
1038 | Recursive uses of the minibuffer will not be affected." | |
1039 | (declare (indent 1) (debug t)) | |
1040 | (let ((hook (make-symbol "setup-hook"))) | |
44dce0fb RS |
1041 | `(let (,hook) |
1042 | (setq ,hook | |
1043 | (lambda () | |
1044 | ;; Clear out this hook so it does not interfere | |
1045 | ;; with any recursive minibuffer usage. | |
1046 | (remove-hook 'minibuffer-setup-hook ,hook) | |
1047 | (,fun))) | |
a42e7db0 SM |
1048 | (unwind-protect |
1049 | (progn | |
1050 | (add-hook 'minibuffer-setup-hook ,hook) | |
1051 | ,@body) | |
1052 | (remove-hook 'minibuffer-setup-hook ,hook))))) | |
1053 | ||
05a7cb3d | 1054 | (defun find-file-read-args (prompt mustmatch) |
e6f0ff92 RS |
1055 | (list (let ((find-file-default |
1056 | (and buffer-file-name | |
a42e7db0 SM |
1057 | (abbreviate-file-name buffer-file-name)))) |
1058 | (minibuffer-with-setup-hook | |
1059 | (lambda () (setq minibuffer-default find-file-default)) | |
1060 | (read-file-name prompt nil default-directory mustmatch))) | |
b2a26f4e | 1061 | t)) |
e6f0ff92 | 1062 | |
243ce842 | 1063 | (defun find-file (filename &optional wildcards) |
b4da00e9 RM |
1064 | "Edit file FILENAME. |
1065 | Switch to a buffer visiting file FILENAME, | |
243ce842 | 1066 | creating one if none already exists. |
e6f0ff92 RS |
1067 | Interactively, the default if you just type RET is the current directory, |
1068 | but the visited file name is available through the minibuffer history: | |
1069 | type M-n to pull it into the minibuffer. | |
1070 | ||
243ce842 | 1071 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
91174d63 | 1072 | expand wildcards (if any) and visit multiple files. You can |
518dc5be | 1073 | suppress wildcard expansion by setting `find-file-wildcards' to nil. |
91174d63 RS |
1074 | |
1075 | To visit a file without any kind of conversion and without | |
1076 | automatically choosing a major mode, use \\[find-file-literally]." | |
a9d6a617 | 1077 | (interactive (find-file-read-args "Find file: " nil)) |
5b8ed07b RS |
1078 | (let ((value (find-file-noselect filename nil nil wildcards))) |
1079 | (if (listp value) | |
1080 | (mapcar 'switch-to-buffer (nreverse value)) | |
1081 | (switch-to-buffer value)))) | |
82d0954a | 1082 | |
243ce842 | 1083 | (defun find-file-other-window (filename &optional wildcards) |
b4da00e9 RM |
1084 | "Edit file FILENAME, in another window. |
1085 | May create a new window, or reuse an existing one. | |
243ce842 | 1086 | See the function `display-buffer'. |
e6f0ff92 RS |
1087 | |
1088 | Interactively, the default if you just type RET is the current directory, | |
1089 | but the visited file name is available through the minibuffer history: | |
1090 | type M-n to pull it into the minibuffer. | |
1091 | ||
243ce842 RS |
1092 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
1093 | expand wildcards (if any) and visit multiple files." | |
05a7cb3d | 1094 | (interactive (find-file-read-args "Find file in other window: " nil)) |
5b8ed07b RS |
1095 | (let ((value (find-file-noselect filename nil nil wildcards))) |
1096 | (if (listp value) | |
1097 | (progn | |
1098 | (setq value (nreverse value)) | |
a9d6a617 JL |
1099 | (cons (switch-to-buffer-other-window (car value)) |
1100 | (mapcar 'switch-to-buffer (cdr value)))) | |
5b8ed07b | 1101 | (switch-to-buffer-other-window value)))) |
243ce842 RS |
1102 | |
1103 | (defun find-file-other-frame (filename &optional wildcards) | |
f98955ea JB |
1104 | "Edit file FILENAME, in another frame. |
1105 | May create a new frame, or reuse an existing one. | |
243ce842 | 1106 | See the function `display-buffer'. |
e6f0ff92 RS |
1107 | |
1108 | Interactively, the default if you just type RET is the current directory, | |
1109 | but the visited file name is available through the minibuffer history: | |
1110 | type M-n to pull it into the minibuffer. | |
1111 | ||
243ce842 RS |
1112 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
1113 | expand wildcards (if any) and visit multiple files." | |
05a7cb3d | 1114 | (interactive (find-file-read-args "Find file in other frame: " nil)) |
5b8ed07b RS |
1115 | (let ((value (find-file-noselect filename nil nil wildcards))) |
1116 | (if (listp value) | |
1117 | (progn | |
1118 | (setq value (nreverse value)) | |
a9d6a617 JL |
1119 | (cons (switch-to-buffer-other-frame (car value)) |
1120 | (mapcar 'switch-to-buffer (cdr value)))) | |
5b8ed07b | 1121 | (switch-to-buffer-other-frame value)))) |
243ce842 | 1122 | |
63c8abc4 EZ |
1123 | (defun find-file-existing (filename) |
1124 | "Edit the existing file FILENAME. | |
1125 | Like \\[find-file] but only allow a file that exists, and do not allow | |
1126 | file names with wildcards." | |
1127 | (interactive (nbutlast (find-file-read-args "Find existing file: " t))) | |
1128 | (if (and (not (interactive-p)) (not (file-exists-p filename))) | |
1129 | (error "%s does not exist" filename) | |
1130 | (find-file filename) | |
1131 | (current-buffer))) | |
46bfc73b | 1132 | |
243ce842 | 1133 | (defun find-file-read-only (filename &optional wildcards) |
b4da00e9 | 1134 | "Edit file FILENAME but don't allow changes. |
e6f0ff92 | 1135 | Like \\[find-file] but marks buffer as read-only. |
b4da00e9 | 1136 | Use \\[toggle-read-only] to permit editing." |
a9d6a617 JL |
1137 | (interactive (find-file-read-args "Find file read-only: " nil)) |
1138 | (unless (or (and wildcards find-file-wildcards | |
1139 | (not (string-match "\\`/:" filename)) | |
1140 | (string-match "[[*?]" filename)) | |
1141 | (file-exists-p filename)) | |
1142 | (error "%s does not exist" filename)) | |
1143 | (let ((value (find-file filename wildcards))) | |
1144 | (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1))) | |
1145 | (if (listp value) value (list value))) | |
1146 | value)) | |
b4da00e9 | 1147 | |
243ce842 | 1148 | (defun find-file-read-only-other-window (filename &optional wildcards) |
b4da00e9 RM |
1149 | "Edit file FILENAME in another window but don't allow changes. |
1150 | Like \\[find-file-other-window] but marks buffer as read-only. | |
1151 | Use \\[toggle-read-only] to permit editing." | |
a9d6a617 JL |
1152 | (interactive (find-file-read-args "Find file read-only other window: " nil)) |
1153 | (unless (or (and wildcards find-file-wildcards | |
1154 | (not (string-match "\\`/:" filename)) | |
1155 | (string-match "[[*?]" filename)) | |
1156 | (file-exists-p filename)) | |
1157 | (error "%s does not exist" filename)) | |
1158 | (let ((value (find-file-other-window filename wildcards))) | |
1159 | (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1))) | |
1160 | (if (listp value) value (list value))) | |
1161 | value)) | |
b4da00e9 | 1162 | |
243ce842 | 1163 | (defun find-file-read-only-other-frame (filename &optional wildcards) |
f98955ea JB |
1164 | "Edit file FILENAME in another frame but don't allow changes. |
1165 | Like \\[find-file-other-frame] but marks buffer as read-only. | |
5bbbceb1 | 1166 | Use \\[toggle-read-only] to permit editing." |
a9d6a617 JL |
1167 | (interactive (find-file-read-args "Find file read-only other frame: " nil)) |
1168 | (unless (or (and wildcards find-file-wildcards | |
1169 | (not (string-match "\\`/:" filename)) | |
1170 | (string-match "[[*?]" filename)) | |
1171 | (file-exists-p filename)) | |
1172 | (error "%s does not exist" filename)) | |
1173 | (let ((value (find-file-other-frame filename wildcards))) | |
1174 | (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1))) | |
1175 | (if (listp value) value (list value))) | |
1176 | value)) | |
1177 | ||
1178 | (defun find-alternate-file-other-window (filename &optional wildcards) | |
60eaf370 | 1179 | "Find file FILENAME as a replacement for the file in the next window. |
a9d6a617 JL |
1180 | This command does not select that window. |
1181 | ||
1182 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, | |
1183 | expand wildcards (if any) and replace the file with multiple files." | |
60eaf370 RS |
1184 | (interactive |
1185 | (save-selected-window | |
1186 | (other-window 1) | |
1187 | (let ((file buffer-file-name) | |
1188 | (file-name nil) | |
1189 | (file-dir nil)) | |
1190 | (and file | |
1191 | (setq file-name (file-name-nondirectory file) | |
1192 | file-dir (file-name-directory file))) | |
1193 | (list (read-file-name | |
a9d6a617 JL |
1194 | "Find alternate file: " file-dir nil nil file-name) |
1195 | t)))) | |
60eaf370 | 1196 | (if (one-window-p) |
a9d6a617 | 1197 | (find-file-other-window filename wildcards) |
60eaf370 RS |
1198 | (save-selected-window |
1199 | (other-window 1) | |
a9d6a617 | 1200 | (find-alternate-file filename wildcards)))) |
60eaf370 | 1201 | |
a9d6a617 | 1202 | (defun find-alternate-file (filename &optional wildcards) |
b4da00e9 RM |
1203 | "Find file FILENAME, select its buffer, kill previous buffer. |
1204 | If the current buffer now contains an empty file that you just visited | |
a9d6a617 JL |
1205 | \(presumably by mistake), use this command to visit the file you really want. |
1206 | ||
1207 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, | |
077f47e2 CY |
1208 | expand wildcards (if any) and replace the file with multiple files. |
1209 | ||
1210 | If the current buffer is an indirect buffer, or the base buffer | |
1211 | for one or more indirect buffers, the other buffer(s) are not | |
1212 | killed." | |
b4da00e9 RM |
1213 | (interactive |
1214 | (let ((file buffer-file-name) | |
1215 | (file-name nil) | |
1216 | (file-dir nil)) | |
1217 | (and file | |
1218 | (setq file-name (file-name-nondirectory file) | |
1219 | file-dir (file-name-directory file))) | |
a61f59b4 | 1220 | (list (read-file-name |
a9d6a617 JL |
1221 | "Find alternate file: " file-dir nil nil file-name) |
1222 | t))) | |
63fabbb4 RS |
1223 | (unless (run-hook-with-args-until-failure 'kill-buffer-query-functions) |
1224 | (error "Aborted")) | |
1225 | (when (and (buffer-modified-p) (buffer-file-name)) | |
38fde45d | 1226 | (if (yes-or-no-p (format "Buffer %s is modified; kill anyway? " |
63fabbb4 | 1227 | (buffer-name))) |
38fde45d CY |
1228 | (unless (yes-or-no-p "Kill and replace the buffer without saving it? ") |
1229 | (error "Aborted")) | |
1230 | (save-buffer))) | |
b4da00e9 RM |
1231 | (let ((obuf (current-buffer)) |
1232 | (ofile buffer-file-name) | |
8bb27285 | 1233 | (onum buffer-file-number) |
37c58ca6 | 1234 | (odir dired-directory) |
8bb27285 | 1235 | (otrue buffer-file-truename) |
b4da00e9 | 1236 | (oname (buffer-name))) |
baf9b8c4 RS |
1237 | (if (get-buffer " **lose**") |
1238 | (kill-buffer " **lose**")) | |
b4da00e9 | 1239 | (rename-buffer " **lose**") |
b4da00e9 RM |
1240 | (unwind-protect |
1241 | (progn | |
1242 | (unlock-buffer) | |
7906c044 RS |
1243 | ;; This prevents us from finding the same buffer |
1244 | ;; if we specified the same file again. | |
a4ad4d96 RS |
1245 | (setq buffer-file-name nil) |
1246 | (setq buffer-file-number nil) | |
1247 | (setq buffer-file-truename nil) | |
7906c044 RS |
1248 | ;; Likewise for dired buffers. |
1249 | (setq dired-directory nil) | |
a9d6a617 | 1250 | (find-file filename wildcards)) |
63fabbb4 RS |
1251 | (when (eq obuf (current-buffer)) |
1252 | ;; This executes if find-file gets an error | |
1253 | ;; and does not really find anything. | |
1254 | ;; We put things back as they were. | |
1255 | ;; If find-file actually finds something, we kill obuf below. | |
1256 | (setq buffer-file-name ofile) | |
1257 | (setq buffer-file-number onum) | |
1258 | (setq buffer-file-truename otrue) | |
7906c044 | 1259 | (setq dired-directory odir) |
63fabbb4 RS |
1260 | (lock-buffer) |
1261 | (rename-buffer oname))) | |
1262 | (unless (eq (current-buffer) obuf) | |
d97a9ff3 RS |
1263 | (with-current-buffer obuf |
1264 | ;; We already asked; don't ask again. | |
1265 | (let ((kill-buffer-query-functions)) | |
1266 | (kill-buffer obuf)))))) | |
9b8ef27d | 1267 | \f |
b4da00e9 RM |
1268 | (defun create-file-buffer (filename) |
1269 | "Create a suitably named buffer for visiting FILENAME, and return it. | |
1270 | FILENAME (sans directory) is used unchanged if that name is free; | |
1271 | otherwise a string <2> or <3> or ... is appended to get an unused name." | |
1272 | (let ((lastname (file-name-nondirectory filename))) | |
1273 | (if (string= lastname "") | |
1274 | (setq lastname filename)) | |
1275 | (generate-new-buffer lastname))) | |
1276 | ||
5bbbceb1 JB |
1277 | (defun generate-new-buffer (name) |
1278 | "Create and return a buffer with a name based on NAME. | |
29165787 | 1279 | Choose the buffer's name using `generate-new-buffer-name'." |
5bbbceb1 JB |
1280 | (get-buffer-create (generate-new-buffer-name name))) |
1281 | ||
ffc0e1ca AS |
1282 | (defcustom automount-dir-prefix "^/tmp_mnt/" |
1283 | "Regexp to match the automounter prefix in a directory name." | |
1284 | :group 'files | |
1285 | :type 'regexp) | |
e373f201 | 1286 | |
ffb3a4db | 1287 | (defvar abbreviated-home-dir nil |
ffc0e1ca | 1288 | "The user's homedir abbreviated according to `directory-abbrev-alist'.") |
ffb3a4db | 1289 | |
5bbbceb1 | 1290 | (defun abbreviate-file-name (filename) |
29165787 | 1291 | "Return a version of FILENAME shortened using `directory-abbrev-alist'. |
fe4e58ec EZ |
1292 | This also substitutes \"~\" for the user's home directory (unless the |
1293 | home directory is a root directory) and removes automounter prefixes | |
1294 | \(see the variable `automount-dir-prefix')." | |
e373f201 | 1295 | ;; Get rid of the prefixes added by the automounter. |
f663a1ce RS |
1296 | (save-match-data |
1297 | (if (and automount-dir-prefix | |
1298 | (string-match automount-dir-prefix filename) | |
1299 | (file-exists-p (file-name-directory | |
1300 | (substring filename (1- (match-end 0)))))) | |
1301 | (setq filename (substring filename (1- (match-end 0))))) | |
1302 | (let ((tail directory-abbrev-alist)) | |
1303 | ;; If any elt of directory-abbrev-alist matches this name, | |
1304 | ;; abbreviate accordingly. | |
1305 | (while tail | |
1306 | (if (string-match (car (car tail)) filename) | |
1307 | (setq filename | |
1308 | (concat (cdr (car tail)) (substring filename (match-end 0))))) | |
1309 | (setq tail (cdr tail))) | |
1310 | ;; Compute and save the abbreviated homedir name. | |
1311 | ;; We defer computing this until the first time it's needed, to | |
1312 | ;; give time for directory-abbrev-alist to be set properly. | |
1313 | ;; We include a slash at the end, to avoid spurious matches | |
1314 | ;; such as `/usr/foobar' when the home dir is `/usr/foo'. | |
1315 | (or abbreviated-home-dir | |
1316 | (setq abbreviated-home-dir | |
1317 | (let ((abbreviated-home-dir "$foo")) | |
1318 | (concat "^" (abbreviate-file-name (expand-file-name "~")) | |
e959542d | 1319 | "\\(/\\|\\'\\)")))) |
f663a1ce RS |
1320 | |
1321 | ;; If FILENAME starts with the abbreviated homedir, | |
1322 | ;; make it start with `~' instead. | |
1323 | (if (and (string-match abbreviated-home-dir filename) | |
1324 | ;; If the home dir is just /, don't change it. | |
1325 | (not (and (= (match-end 0) 1) | |
1326 | (= (aref filename 0) ?/))) | |
1327 | ;; MS-DOS root directories can come with a drive letter; | |
1328 | ;; Novell Netware allows drive letters beyond `Z:'. | |
1329 | (not (and (or (eq system-type 'ms-dos) | |
1330 | (eq system-type 'cygwin) | |
1331 | (eq system-type 'windows-nt)) | |
1332 | (save-match-data | |
1333 | (string-match "^[a-zA-`]:/$" filename))))) | |
5bbbceb1 | 1334 | (setq filename |
f663a1ce RS |
1335 | (concat "~" |
1336 | (match-string 1 filename) | |
1337 | (substring filename (match-end 0))))) | |
1338 | filename))) | |
5bbbceb1 | 1339 | |
21540597 | 1340 | (defcustom find-file-not-true-dirname-list nil |
ba83982b | 1341 | "List of logical names for which visiting shouldn't save the true dirname. |
1770543d RS |
1342 | On VMS, when you visit a file using a logical name that searches a path, |
1343 | you may or may not want the visited file name to record the specific | |
1344 | directory where the file was found. If you *do not* want that, add the logical | |
21540597 RS |
1345 | name to this list as a string." |
1346 | :type '(repeat (string :tag "Name")) | |
1347 | :group 'find-file) | |
1770543d | 1348 | |
3a64a3cf | 1349 | (defun find-buffer-visiting (filename &optional predicate) |
138c44f6 KH |
1350 | "Return the buffer visiting file FILENAME (a string). |
1351 | This is like `get-file-buffer', except that it checks for any buffer | |
1352 | visiting the same file, possibly under a different name. | |
a1b0c2a7 RS |
1353 | If PREDICATE is non-nil, only buffers satisfying it are eligible, |
1354 | and others are ignored. | |
138c44f6 | 1355 | If there is no such live buffer, return nil." |
3a64a3cf JB |
1356 | (let ((predicate (or predicate #'identity)) |
1357 | (truename (abbreviate-file-name (file-truename filename)))) | |
1358 | (or (let ((buf (get-file-buffer filename))) | |
1359 | (when (and buf (funcall predicate buf)) buf)) | |
1360 | (let ((list (buffer-list)) found) | |
1361 | (while (and (not found) list) | |
1362 | (save-excursion | |
1363 | (set-buffer (car list)) | |
1364 | (if (and buffer-file-name | |
1365 | (string= buffer-file-truename truename) | |
1366 | (funcall predicate (current-buffer))) | |
1367 | (setq found (car list)))) | |
1368 | (setq list (cdr list))) | |
1369 | found) | |
1370 | (let* ((attributes (file-attributes truename)) | |
1371 | (number (nthcdr 10 attributes)) | |
1372 | (list (buffer-list)) found) | |
1373 | (and buffer-file-numbers-unique | |
02bb2aab | 1374 | (car-safe number) ;Make sure the inode is not just nil. |
3a64a3cf JB |
1375 | (while (and (not found) list) |
1376 | (with-current-buffer (car list) | |
1377 | (if (and buffer-file-name | |
1378 | (equal buffer-file-number number) | |
1379 | ;; Verify this buffer's file number | |
1380 | ;; still belongs to its file. | |
1381 | (file-exists-p buffer-file-name) | |
1382 | (equal (file-attributes buffer-file-truename) | |
1383 | attributes) | |
1384 | (funcall predicate (current-buffer))) | |
1385 | (setq found (car list)))) | |
1386 | (setq list (cdr list)))) | |
1387 | found)))) | |
9b8ef27d | 1388 | \f |
5de148a2 | 1389 | (defcustom find-file-wildcards t |
ba83982b | 1390 | "Non-nil means file-visiting commands should handle wildcards. |
5de148a2 RS |
1391 | For example, if you specify `*.c', that would visit all the files |
1392 | whose names match the pattern." | |
1393 | :group 'files | |
3957c982 | 1394 | :version "20.4" |
5de148a2 RS |
1395 | :type 'boolean) |
1396 | ||
ffc0e1ca | 1397 | (defcustom find-file-suppress-same-file-warnings nil |
ba83982b | 1398 | "Non-nil means suppress warning messages for symlinked files. |
ffc0e1ca AS |
1399 | When nil, Emacs prints a warning when visiting a file that is already |
1400 | visited, but with a different name. Setting this option to t | |
1401 | suppresses this warning." | |
1402 | :group 'files | |
1403 | :version "21.1" | |
1404 | :type 'boolean) | |
1405 | ||
818286f4 | 1406 | (defcustom large-file-warning-threshold 10000000 |
5d648479 JPW |
1407 | "Maximum size of file above which a confirmation is requested. |
1408 | When nil, never request confirmation." | |
1409 | :group 'files | |
1410 | :group 'find-file | |
bf247b6e | 1411 | :version "22.1" |
5d648479 | 1412 | :type '(choice integer (const :tag "Never request confirmation" nil))) |
818286f4 | 1413 | |
243ce842 | 1414 | (defun find-file-noselect (filename &optional nowarn rawfile wildcards) |
b4da00e9 RM |
1415 | "Read file FILENAME into a buffer and return the buffer. |
1416 | If a buffer exists visiting FILENAME, return that one, but | |
1417 | verify that the file has not changed since visited or saved. | |
82d0954a | 1418 | The buffer is not selected, just returned to the caller. |
26b9ecbc JB |
1419 | Optional second arg NOWARN non-nil means suppress any warning messages. |
1420 | Optional third arg RAWFILE non-nil means the file is read literally. | |
1421 | Optional fourth arg WILDCARDS non-nil means do wildcard processing | |
5b8ed07b | 1422 | and visit all the matching files. When wildcards are actually |
a9d6a617 JL |
1423 | used and expanded, return a list of buffers that are visiting |
1424 | the various files." | |
e373f201 JB |
1425 | (setq filename |
1426 | (abbreviate-file-name | |
1427 | (expand-file-name filename))) | |
b4da00e9 | 1428 | (if (file-directory-p filename) |
ffc0e1ca AS |
1429 | (or (and find-file-run-dired |
1430 | (run-hook-with-args-until-success | |
1431 | 'find-directory-functions | |
1432 | (if find-file-visit-truename | |
1433 | (abbreviate-file-name (file-truename filename)) | |
1434 | filename))) | |
1435 | (error "%s is a directory" filename)) | |
243ce842 RS |
1436 | (if (and wildcards |
1437 | find-file-wildcards | |
f91fe604 | 1438 | (not (string-match "\\`/:" filename)) |
5de148a2 | 1439 | (string-match "[[*?]" filename)) |
ffc0e1ca AS |
1440 | (let ((files (condition-case nil |
1441 | (file-expand-wildcards filename t) | |
1442 | (error (list filename)))) | |
5de148a2 | 1443 | (find-file-wildcards nil)) |
f91fe604 | 1444 | (if (null files) |
ffc0e1ca | 1445 | (find-file-noselect filename) |
648ec2ff | 1446 | (mapcar #'find-file-noselect files))) |
5de148a2 RS |
1447 | (let* ((buf (get-file-buffer filename)) |
1448 | (truename (abbreviate-file-name (file-truename filename))) | |
818286f4 SM |
1449 | (attributes (file-attributes truename)) |
1450 | (number (nthcdr 10 attributes)) | |
5de148a2 RS |
1451 | ;; Find any buffer for a file which has same truename. |
1452 | (other (and (not buf) (find-buffer-visiting filename)))) | |
1453 | ;; Let user know if there is a buffer with the same truename. | |
1454 | (if other | |
1455 | (progn | |
1456 | (or nowarn | |
ffc0e1ca | 1457 | find-file-suppress-same-file-warnings |
5de148a2 RS |
1458 | (string-equal filename (buffer-file-name other)) |
1459 | (message "%s and %s are the same file" | |
1460 | filename (buffer-file-name other))) | |
1461 | ;; Optionally also find that buffer. | |
1462 | (if (or find-file-existing-other-name find-file-visit-truename) | |
1463 | (setq buf other)))) | |
818286f4 SM |
1464 | ;; Check to see if the file looks uncommonly large. |
1465 | (when (and large-file-warning-threshold (nth 7 attributes) | |
1466 | ;; Don't ask again if we already have the file or | |
1467 | ;; if we're asked to be quiet. | |
1468 | (not (or buf nowarn)) | |
1469 | (> (nth 7 attributes) large-file-warning-threshold) | |
1470 | (not (y-or-n-p | |
879bae91 | 1471 | (format "File %s is large (%dMB), really open? " |
818286f4 SM |
1472 | (file-name-nondirectory filename) |
1473 | (/ (nth 7 attributes) 1048576))))) | |
1474 | (error "Aborted")) | |
5de148a2 RS |
1475 | (if buf |
1476 | ;; We are using an existing buffer. | |
2c5b1db7 | 1477 | (let (nonexistent) |
5de148a2 RS |
1478 | (or nowarn |
1479 | (verify-visited-file-modtime buf) | |
1480 | (cond ((not (file-exists-p filename)) | |
2c5b1db7 RS |
1481 | (setq nonexistent t) |
1482 | (message "File %s no longer exists!" filename)) | |
5de148a2 RS |
1483 | ;; Certain files should be reverted automatically |
1484 | ;; if they have changed on disk and not in the buffer. | |
1485 | ((and (not (buffer-modified-p buf)) | |
1486 | (let ((tail revert-without-query) | |
1487 | (found nil)) | |
1488 | (while tail | |
1489 | (if (string-match (car tail) filename) | |
1490 | (setq found t)) | |
1491 | (setq tail (cdr tail))) | |
1492 | found)) | |
1493 | (with-current-buffer buf | |
1494 | (message "Reverting file %s..." filename) | |
1495 | (revert-buffer t t) | |
1496 | (message "Reverting file %s...done" filename))) | |
1497 | ((yes-or-no-p | |
1498 | (if (string= (file-name-nondirectory filename) | |
1499 | (buffer-name buf)) | |
1500 | (format | |
1501 | (if (buffer-modified-p buf) | |
1502 | "File %s changed on disk. Discard your edits? " | |
1503 | "File %s changed on disk. Reread from disk? ") | |
1504 | (file-name-nondirectory filename)) | |
ddd64da9 RS |
1505 | (format |
1506 | (if (buffer-modified-p buf) | |
5de148a2 RS |
1507 | "File %s changed on disk. Discard your edits in %s? " |
1508 | "File %s changed on disk. Reread from disk into %s? ") | |
1509 | (file-name-nondirectory filename) | |
1510 | (buffer-name buf)))) | |
1511 | (with-current-buffer buf | |
1512 | (revert-buffer t t))))) | |
1513 | (with-current-buffer buf | |
a8d002d2 GM |
1514 | |
1515 | ;; Check if a formerly read-only file has become | |
e554eeb7 RS |
1516 | ;; writable and vice versa, but if the buffer agrees |
1517 | ;; with the new state of the file, that is ok too. | |
a8d002d2 | 1518 | (let ((read-only (not (file-writable-p buffer-file-name)))) |
2c5b1db7 RS |
1519 | (unless (or nonexistent |
1520 | (eq read-only buffer-file-read-only) | |
e554eeb7 | 1521 | (eq read-only buffer-read-only)) |
a8d002d2 | 1522 | (when (or nowarn |
36236b72 | 1523 | (let ((question |
a8d002d2 GM |
1524 | (format "File %s is %s on disk. Change buffer mode? " |
1525 | buffer-file-name | |
1526 | (if read-only "read-only" "writable")))) | |
1527 | (y-or-n-p question))) | |
e554eeb7 RS |
1528 | (setq buffer-read-only read-only))) |
1529 | (setq buffer-file-read-only read-only)) | |
a8d002d2 | 1530 | |
ef59dd3b EZ |
1531 | (when (and (not (eq (not (null rawfile)) |
1532 | (not (null find-file-literally)))) | |
2c5b1db7 | 1533 | (not nonexistent) |
ef59dd3b EZ |
1534 | ;; It is confusing to ask whether to visit |
1535 | ;; non-literally if they have the file in | |
1536 | ;; hexl-mode. | |
1537 | (not (eq major-mode 'hexl-mode))) | |
5de148a2 | 1538 | (if (buffer-modified-p) |
562ca538 | 1539 | (if (y-or-n-p |
674b7bae | 1540 | (format |
562ca538 RS |
1541 | (if rawfile |
1542 | "The file %s is already visited normally, | |
1543 | and you have edited the buffer. Now you have asked to visit it literally, | |
1544 | meaning no coding system handling, format conversion, or local variables. | |
1545 | Emacs can only visit a file in one way at a time. | |
1546 | ||
1547 | Do you want to save the file, and visit it literally instead? " | |
1548 | "The file %s is already visited literally, | |
1549 | meaning no coding system handling, format conversion, or local variables. | |
1550 | You have edited the buffer. Now you have asked to visit the file normally, | |
1551 | but Emacs can only visit a file in one way at a time. | |
1552 | ||
1553 | Do you want to save the file, and visit it normally instead? ") | |
1554 | (file-name-nondirectory filename))) | |
5de148a2 RS |
1555 | (progn |
1556 | (save-buffer) | |
1557 | (find-file-noselect-1 buf filename nowarn | |
1558 | rawfile truename number)) | |
562ca538 | 1559 | (if (y-or-n-p |
674b7bae | 1560 | (format |
562ca538 RS |
1561 | (if rawfile |
1562 | "\ | |
1563 | Do you want to discard your changes, and visit the file literally now? " | |
1564 | "\ | |
1565 | Do you want to discard your changes, and visit the file normally now? "))) | |
5de148a2 RS |
1566 | (find-file-noselect-1 buf filename nowarn |
1567 | rawfile truename number) | |
1568 | (error (if rawfile "File already visited non-literally" | |
1569 | "File already visited literally")))) | |
674b7bae JB |
1570 | (if (y-or-n-p |
1571 | (format | |
562ca538 RS |
1572 | (if rawfile |
1573 | "The file %s is already visited normally. | |
1574 | You have asked to visit it literally, | |
1575 | meaning no coding system decoding, format conversion, or local variables. | |
1576 | But Emacs can only visit a file in one way at a time. | |
1577 | ||
1578 | Do you want to revisit the file literally now? " | |
1579 | "The file %s is already visited literally, | |
1580 | meaning no coding system decoding, format conversion, or local variables. | |
1581 | You have asked to visit it normally, | |
1582 | but Emacs can only visit a file in one way at a time. | |
1583 | ||
1584 | Do you want to revisit the file normally now? ") | |
1585 | (file-name-nondirectory filename))) | |
5de148a2 RS |
1586 | (find-file-noselect-1 buf filename nowarn |
1587 | rawfile truename number) | |
1588 | (error (if rawfile "File already visited non-literally" | |
1589 | "File already visited literally")))))) | |
1590 | ;; Return the buffer we are using. | |
1591 | buf) | |
1592 | ;; Create a new buffer. | |
1593 | (setq buf (create-file-buffer filename)) | |
5de148a2 RS |
1594 | ;; find-file-noselect-1 may use a different buffer. |
1595 | (find-file-noselect-1 buf filename nowarn | |
1596 | rawfile truename number)))))) | |
ddd64da9 RS |
1597 | |
1598 | (defun find-file-noselect-1 (buf filename nowarn rawfile truename number) | |
4edcfd17 | 1599 | (let (error) |
ddd64da9 RS |
1600 | (with-current-buffer buf |
1601 | (kill-local-variable 'find-file-literally) | |
b296cbd4 RS |
1602 | ;; Needed in case we are re-visiting the file with a different |
1603 | ;; text representation. | |
e73ec04b | 1604 | (kill-local-variable 'buffer-file-coding-system) |
4ad1689f | 1605 | (kill-local-variable 'cursor-type) |
4edcfd17 | 1606 | (let ((inhibit-read-only t)) |
0a11c70b LT |
1607 | (erase-buffer)) |
1608 | (and (default-value 'enable-multibyte-characters) | |
1609 | (not rawfile) | |
1610 | (set-buffer-multibyte t)) | |
1611 | (if rawfile | |
74dca654 | 1612 | (condition-case () |
0a11c70b LT |
1613 | (let ((inhibit-read-only t)) |
1614 | (insert-file-contents-literally filename t)) | |
74dca654 LT |
1615 | (file-error |
1616 | (when (and (file-exists-p filename) | |
1617 | (not (file-readable-p filename))) | |
1618 | (kill-buffer buf) | |
1619 | (signal 'file-error (list "File is not readable" | |
1620 | filename))) | |
0a11c70b LT |
1621 | ;; Unconditionally set error |
1622 | (setq error t))) | |
1623 | (condition-case () | |
1624 | (let ((inhibit-read-only t)) | |
1625 | (insert-file-contents filename t)) | |
1626 | (file-error | |
1627 | (when (and (file-exists-p filename) | |
1628 | (not (file-readable-p filename))) | |
1629 | (kill-buffer buf) | |
1630 | (signal 'file-error (list "File is not readable" | |
1631 | filename))) | |
e0d8fc91 | 1632 | ;; Run find-file-not-found-functions until one returns non-nil. |
0a11c70b LT |
1633 | (or (run-hook-with-args-until-success 'find-file-not-found-functions) |
1634 | ;; If they fail too, set error. | |
1635 | (setq error t))))) | |
b120e713 KH |
1636 | ;; Record the file's truename, and maybe use that as visited name. |
1637 | (if (equal filename buffer-file-name) | |
1638 | (setq buffer-file-truename truename) | |
9ab19105 DL |
1639 | (setq buffer-file-truename |
1640 | (abbreviate-file-name (file-truename buffer-file-name)))) | |
ddd64da9 RS |
1641 | (setq buffer-file-number number) |
1642 | ;; On VMS, we may want to remember which directory in a search list | |
1643 | ;; the file was found in. | |
1644 | (and (eq system-type 'vax-vms) | |
1645 | (let (logical) | |
1646 | (if (string-match ":" (file-name-directory filename)) | |
1647 | (setq logical (substring (file-name-directory filename) | |
1648 | 0 (match-beginning 0)))) | |
1649 | (not (member logical find-file-not-true-dirname-list))) | |
1650 | (setq buffer-file-name buffer-file-truename)) | |
1651 | (if find-file-visit-truename | |
e442c62b | 1652 | (setq buffer-file-name (expand-file-name buffer-file-truename))) |
ddd64da9 | 1653 | ;; Set buffer's default directory to that of the file. |
b120e713 | 1654 | (setq default-directory (file-name-directory buffer-file-name)) |
ddd64da9 RS |
1655 | ;; Turn off backup files for certain file names. Since |
1656 | ;; this is a permanent local, the major mode won't eliminate it. | |
b98a8e06 RS |
1657 | (and backup-enable-predicate |
1658 | (not (funcall backup-enable-predicate buffer-file-name)) | |
ddd64da9 RS |
1659 | (progn |
1660 | (make-local-variable 'backup-inhibited) | |
1661 | (setq backup-inhibited t))) | |
f402ba38 RS |
1662 | (if rawfile |
1663 | (progn | |
1664 | (set-buffer-multibyte nil) | |
1665 | (setq buffer-file-coding-system 'no-conversion) | |
e8f30180 | 1666 | (set-buffer-major-mode buf) |
f402ba38 RS |
1667 | (make-local-variable 'find-file-literally) |
1668 | (setq find-file-literally t)) | |
1669 | (after-find-file error (not nowarn))) | |
1670 | (current-buffer)))) | |
9b8ef27d RS |
1671 | \f |
1672 | (defun insert-file-contents-literally (filename &optional visit beg end replace) | |
1673 | "Like `insert-file-contents', but only reads in the file literally. | |
1674 | A buffer may be modified in several ways after reading into the buffer, | |
1675 | to Emacs features such as format decoding, character code | |
0370fe77 | 1676 | conversion, `find-file-hook', automatic uncompression, etc. |
9b8ef27d RS |
1677 | |
1678 | This function ensures that none of these modifications will take place." | |
1679 | (let ((format-alist nil) | |
1680 | (after-insert-file-functions nil) | |
1681 | (coding-system-for-read 'no-conversion) | |
1682 | (coding-system-for-write 'no-conversion) | |
9b8ef27d | 1683 | (find-buffer-file-type-function |
cdec2ad7 JB |
1684 | (if (fboundp 'find-buffer-file-type) |
1685 | (symbol-function 'find-buffer-file-type) | |
1686 | nil)) | |
1687 | (inhibit-file-name-handlers | |
1688 | (append '(jka-compr-handler image-file-handler) | |
1689 | inhibit-file-name-handlers)) | |
1690 | (inhibit-file-name-operation 'insert-file-contents)) | |
9b8ef27d | 1691 | (unwind-protect |
cdec2ad7 JB |
1692 | (progn |
1693 | (fset 'find-buffer-file-type (lambda (filename) t)) | |
1694 | (insert-file-contents filename visit beg end replace)) | |
9b8ef27d RS |
1695 | (if find-buffer-file-type-function |
1696 | (fset 'find-buffer-file-type find-buffer-file-type-function) | |
1697 | (fmakunbound 'find-buffer-file-type))))) | |
1698 | ||
3a64a3cf JB |
1699 | (defun insert-file-1 (filename insert-func) |
1700 | (if (file-directory-p filename) | |
1701 | (signal 'file-error (list "Opening input file" "file is a directory" | |
1702 | filename))) | |
1703 | (let* ((buffer (find-buffer-visiting (abbreviate-file-name (file-truename filename)) | |
1704 | #'buffer-modified-p)) | |
1705 | (tem (funcall insert-func filename))) | |
1706 | (push-mark (+ (point) (car (cdr tem)))) | |
1707 | (when buffer | |
1708 | (message "File %s already visited and modified in buffer %s" | |
1709 | filename (buffer-name buffer))))) | |
1710 | ||
9b8ef27d RS |
1711 | (defun insert-file-literally (filename) |
1712 | "Insert contents of file FILENAME into buffer after point with no conversion. | |
1713 | ||
1714 | This function is meant for the user to run interactively. | |
1715 | Don't call it from programs! Use `insert-file-contents-literally' instead. | |
1716 | \(Its calling sequence is different; see its documentation)." | |
1717 | (interactive "*fInsert file literally: ") | |
3a64a3cf | 1718 | (insert-file-1 filename #'insert-file-contents-literally)) |
9b8ef27d RS |
1719 | |
1720 | (defvar find-file-literally nil | |
1721 | "Non-nil if this buffer was made by `find-file-literally' or equivalent. | |
1722 | This is a permanent local.") | |
1723 | (put 'find-file-literally 'permanent-local t) | |
5fc196af | 1724 | |
ffc0e1ca | 1725 | (defun find-file-literally (filename) |
5fc196af RS |
1726 | "Visit file FILENAME with no conversion of any kind. |
1727 | Format conversion and character code conversion are both disabled, | |
1728 | and multibyte characters are disabled in the resulting buffer. | |
e65db7b8 RS |
1729 | The major mode used is Fundamental mode regardless of the file name, |
1730 | and local variable specifications in the file are ignored. | |
407b4328 GM |
1731 | Automatic uncompression and adding a newline at the end of the |
1732 | file due to `require-final-newline' is also disabled. | |
9b8ef27d RS |
1733 | |
1734 | You cannot absolutely rely on this function to result in | |
b9aa9537 | 1735 | visiting the file literally. If Emacs already has a buffer |
9b8ef27d RS |
1736 | which is visiting the file, you get the existing buffer, |
1737 | regardless of whether it was created literally or not. | |
1738 | ||
1739 | In a Lisp program, if you want to be sure of accessing a file's | |
1740 | contents literally, you should create a temporary buffer and then read | |
1741 | the file contents into it using `insert-file-contents-literally'." | |
5fc196af | 1742 | (interactive "FFind file literally: ") |
9b8ef27d | 1743 | (switch-to-buffer (find-file-noselect filename nil t))) |
b4da00e9 | 1744 | \f |
f7d786d0 RS |
1745 | (defvar after-find-file-from-revert-buffer nil) |
1746 | ||
e0ab8879 | 1747 | (defun after-find-file (&optional error warn noauto |
9a30563f RS |
1748 | after-find-file-from-revert-buffer |
1749 | nomodes) | |
b4da00e9 RM |
1750 | "Called after finding a file and by the default revert function. |
1751 | Sets buffer mode, parses local variables. | |
8cfb9d46 | 1752 | Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an |
b4da00e9 RM |
1753 | error in reading the file. WARN non-nil means warn if there |
1754 | exists an auto-save file more recent than the visited file. | |
8cfb9d46 | 1755 | NOAUTO means don't mess with auto-save mode. |
e0ab8879 RS |
1756 | Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil |
1757 | means this call was from `revert-buffer'. | |
9a30563f | 1758 | Fifth arg NOMODES non-nil means don't alter the file's modes. |
0370fe77 | 1759 | Finishes by calling the functions in `find-file-hook' |
9a30563f | 1760 | unless NOMODES is non-nil." |
b4da00e9 RM |
1761 | (setq buffer-read-only (not (file-writable-p buffer-file-name))) |
1762 | (if noninteractive | |
1763 | nil | |
1764 | (let* (not-serious | |
1765 | (msg | |
fe50b6ab GM |
1766 | (cond |
1767 | ((not warn) nil) | |
1768 | ((and error (file-attributes buffer-file-name)) | |
1769 | (setq buffer-read-only t) | |
1770 | "File exists, but cannot be read") | |
1771 | ((not buffer-read-only) | |
1772 | (if (and warn | |
1773 | ;; No need to warn if buffer is auto-saved | |
1774 | ;; under the name of the visited file. | |
1775 | (not (and buffer-file-name | |
1776 | auto-save-visited-file-name)) | |
1777 | (file-newer-than-file-p (or buffer-auto-save-file-name | |
1778 | (make-auto-save-file-name)) | |
1779 | buffer-file-name)) | |
64d18e8f | 1780 | (format "%s has auto save data; consider M-x recover-this-file" |
fe50b6ab GM |
1781 | (file-name-nondirectory buffer-file-name)) |
1782 | (setq not-serious t) | |
1783 | (if error "(New file)" nil))) | |
1784 | ((not error) | |
1785 | (setq not-serious t) | |
1786 | "Note: file is write protected") | |
1787 | ((file-attributes (directory-file-name default-directory)) | |
1788 | "File not found and directory write-protected") | |
1789 | ((file-exists-p (file-name-directory buffer-file-name)) | |
1790 | (setq buffer-read-only nil)) | |
1791 | (t | |
1792 | (setq buffer-read-only nil) | |
07703430 | 1793 | "Use M-x make-directory RET RET to create the directory and its parents")))) |
fe50b6ab | 1794 | (when msg |
a74357d4 | 1795 | (message "%s" msg) |
e09f3bff | 1796 | (or not-serious (sit-for 1 t)))) |
fe50b6ab GM |
1797 | (when (and auto-save-default (not noauto)) |
1798 | (auto-save-mode t))) | |
ffc0e1ca AS |
1799 | ;; Make people do a little extra work (C-x C-q) |
1800 | ;; before altering a backup file. | |
fe50b6ab GM |
1801 | (when (backup-file-name-p buffer-file-name) |
1802 | (setq buffer-read-only t)) | |
8fd9c174 RS |
1803 | ;; When a file is marked read-only, |
1804 | ;; make the buffer read-only even if root is looking at it. | |
879365c6 KS |
1805 | (when (and (file-modes (buffer-file-name)) |
1806 | (zerop (logand (file-modes (buffer-file-name)) #o222))) | |
8fd9c174 | 1807 | (setq buffer-read-only t)) |
fe50b6ab GM |
1808 | (unless nomodes |
1809 | (when (and view-read-only view-mode) | |
1810 | (view-mode-disable)) | |
9a30563f | 1811 | (normal-mode t) |
f4206092 RS |
1812 | ;; If requested, add a newline at the end of the file. |
1813 | (and (memq require-final-newline '(visit visit-save)) | |
1814 | (> (point-max) (point-min)) | |
1815 | (/= (char-after (1- (point-max))) ?\n) | |
1816 | (not (and (eq selective-display t) | |
1817 | (= (char-after (1- (point-max))) ?\r))) | |
1818 | (save-excursion | |
1819 | (goto-char (point-max)) | |
1820 | (insert "\n"))) | |
fe50b6ab GM |
1821 | (when (and buffer-read-only |
1822 | view-read-only | |
1823 | (not (eq (get major-mode 'mode-class) 'special))) | |
1824 | (view-mode-enter)) | |
0370fe77 | 1825 | (run-hooks 'find-file-hook))) |
b4da00e9 | 1826 | |
818286f4 SM |
1827 | (defmacro report-errors (format &rest body) |
1828 | "Eval BODY and turn any error into a FORMAT message. | |
1829 | FORMAT can have a %s escape which will be replaced with the actual error. | |
1830 | If `debug-on-error' is set, errors are not caught, so that you can | |
1831 | debug them. | |
1832 | Avoid using a large BODY since it is duplicated." | |
1833 | (declare (debug t) (indent 1)) | |
1834 | `(if debug-on-error | |
1835 | (progn . ,body) | |
1836 | (condition-case err | |
1837 | (progn . ,body) | |
1838 | (error (message ,format (prin1-to-string err)))))) | |
1839 | ||
b4da00e9 RM |
1840 | (defun normal-mode (&optional find-file) |
1841 | "Choose the major mode for this buffer automatically. | |
1842 | Also sets up any specified local variables of the file. | |
1843 | Uses the visited file name, the -*- line, and the local variables spec. | |
1844 | ||
1845 | This function is called automatically from `find-file'. In that case, | |
aa5fcebf | 1846 | we may set up the file-specified mode and local variables, |
a5ce12c3 | 1847 | depending on the value of `enable-local-variables'. |
aa5fcebf KH |
1848 | In addition, if `local-enable-local-variables' is nil, we do |
1849 | not set local variables (though we do notice a mode specified with -*-.) | |
1850 | ||
1851 | `enable-local-variables' is ignored if you run `normal-mode' interactively, | |
1852 | or from Lisp without specifying the optional argument FIND-FILE; | |
1853 | in that case, this function acts as if `enable-local-variables' were t." | |
b4da00e9 | 1854 | (interactive) |
e8f30180 | 1855 | (funcall (or default-major-mode 'fundamental-mode)) |
0fc205c6 LT |
1856 | (let ((enable-local-variables (or (not find-file) enable-local-variables))) |
1857 | (report-errors "File mode specification error: %s" | |
1858 | (set-auto-mode)) | |
1859 | (report-errors "File local-variables error: %s" | |
818286f4 | 1860 | (hack-local-variables))) |
6e86be0b RS |
1861 | ;; Turn font lock off and on, to make sure it takes account of |
1862 | ;; whatever file local variables are relevant to it. | |
344f1111 SM |
1863 | (when (and font-lock-mode |
1864 | ;; Font-lock-mode (now in font-core.el) can be ON when | |
1865 | ;; font-lock.el still hasn't been loaded. | |
1866 | (boundp 'font-lock-keywords) | |
1867 | (eq (car font-lock-keywords) t)) | |
6e86be0b RS |
1868 | (setq font-lock-keywords (cadr font-lock-keywords)) |
1869 | (font-lock-mode 1)) | |
1870 | ||
24c9eeeb DL |
1871 | (if (fboundp 'ucs-set-table-for-input) ; don't lose when building |
1872 | (ucs-set-table-for-input))) | |
b4da00e9 | 1873 | |
94495713 KS |
1874 | (defcustom auto-mode-case-fold nil |
1875 | "Non-nil means to try second pass through `auto-mode-alist'. | |
1876 | This means that if the first case-sensitive search through the alist fails | |
1877 | to find a matching major mode, a second case-insensitive search is made. | |
1878 | On systems with case-insensitive file names, this variable is ignored, | |
bb178aaa | 1879 | since only a single case-insensitive search through the alist is made." |
94495713 KS |
1880 | :group 'files |
1881 | :version "22.1" | |
1882 | :type 'boolean) | |
1883 | ||
f76e0cd0 | 1884 | (defvar auto-mode-alist |
f209c999 MS |
1885 | ;; Note: The entries for the modes defined in cc-mode.el (c-mode, |
1886 | ;; c++-mode, java-mode and more) are added through autoload | |
1887 | ;; directives in that file. That way is discouraged since it | |
1888 | ;; spreads out the definition of the initial value. | |
ffc0e1ca AS |
1889 | (mapc |
1890 | (lambda (elt) | |
1891 | (cons (purecopy (car elt)) (cdr elt))) | |
813731b3 | 1892 | `(;; do this first, so that .html.pl is Polish html, not Perl |
9e6f5419 DP |
1893 | ("\\.s?html?\\(\\.[a-zA-Z_]+\\)?\\'" . html-mode) |
1894 | ("\\.te?xt\\'" . text-mode) | |
bbc67516 | 1895 | ("\\.[tT]e[xX]\\'" . tex-mode) |
4e163715 | 1896 | ("\\.ins\\'" . tex-mode) ;Installation files for TeX packages. |
ffc0e1ca | 1897 | ("\\.ltx\\'" . latex-mode) |
4e163715 | 1898 | ("\\.dtx\\'" . doctex-mode) |
ffc0e1ca | 1899 | ("\\.el\\'" . emacs-lisp-mode) |
21575d92 | 1900 | ("\\.\\(scm\\|stk\\|ss\\|sch\\)\\'" . scheme-mode) |
ffc0e1ca | 1901 | ("\\.l\\'" . lisp-mode) |
bbc67516 DP |
1902 | ("\\.li?sp\\'" . lisp-mode) |
1903 | ("\\.[fF]\\'" . fortran-mode) | |
ffc0e1ca AS |
1904 | ("\\.for\\'" . fortran-mode) |
1905 | ("\\.p\\'" . pascal-mode) | |
1906 | ("\\.pas\\'" . pascal-mode) | |
1907 | ("\\.ad[abs]\\'" . ada-mode) | |
7defe888 | 1908 | ("\\.ad[bs].dg\\'" . ada-mode) |
bbc67516 | 1909 | ("\\.\\([pP]\\([Llm]\\|erl\\|od\\)\\|al\\)\\'" . perl-mode) |
3968c89f | 1910 | ("Imakefile\\'" . makefile-imake-mode) |
8088bb2c DP |
1911 | ("Makeppfile\\(?:\\.mk\\)?\\'" . makefile-makepp-mode) ; Put this before .mk |
1912 | ("\\.makepp\\'" . makefile-makepp-mode) | |
813731b3 DP |
1913 | ,@(if (memq system-type '(berkeley-unix next-mach darwin)) |
1914 | '(("\\.mk\\'" . makefile-bsdmake-mode) | |
47d4e709 | 1915 | ("GNUmakefile\\'" . makefile-gmake-mode) |
813731b3 DP |
1916 | ("[Mm]akefile\\'" . makefile-bsdmake-mode)) |
1917 | '(("\\.mk\\'" . makefile-gmake-mode) ; Might be any make, give Gnu the host advantage | |
47d4e709 | 1918 | ("[Mm]akefile\\'" . makefile-gmake-mode))) |
27a7c83f | 1919 | ("\\.am\\'" . makefile-automake-mode) |
5c6d31a4 SM |
1920 | ;; Less common extensions come here |
1921 | ;; so more common ones above are found faster. | |
ffc0e1ca AS |
1922 | ("\\.texinfo\\'" . texinfo-mode) |
1923 | ("\\.te?xi\\'" . texinfo-mode) | |
bbc67516 | 1924 | ("\\.[sS]\\'" . asm-mode) |
ffc0e1ca | 1925 | ("\\.asm\\'" . asm-mode) |
bbc67516 | 1926 | ("[cC]hange\\.?[lL]og?\\'" . change-log-mode) |
c595fad9 | 1927 | ("[cC]hange[lL]og[-.][0-9]+\\'" . change-log-mode) |
ffc0e1ca AS |
1928 | ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode) |
1929 | ("\\.scm\\.[0-9]*\\'" . scheme-mode) | |
1930 | ("\\.[ck]?sh\\'\\|\\.shar\\'\\|/\\.z?profile\\'" . sh-mode) | |
b921b596 | 1931 | ("\\.bash\\'" . sh-mode) |
ffc0e1ca AS |
1932 | ("\\(/\\|\\`\\)\\.\\(bash_profile\\|z?login\\|bash_login\\|z?logout\\)\\'" . sh-mode) |
1933 | ("\\(/\\|\\`\\)\\.\\(bash_logout\\|shrc\\|[kz]shrc\\|bashrc\\|t?cshrc\\|esrc\\)\\'" . sh-mode) | |
1934 | ("\\(/\\|\\`\\)\\.\\([kz]shenv\\|xinitrc\\|startxrc\\|xsession\\)\\'" . sh-mode) | |
d5798fa7 | 1935 | ("\\.m?spec\\'" . sh-mode) |
bbc67516 | 1936 | ("\\.m[mes]\\'" . nroff-mode) |
ffc0e1ca | 1937 | ("\\.man\\'" . nroff-mode) |
ffc0e1ca | 1938 | ("\\.sty\\'" . latex-mode) |
bbc67516 | 1939 | ("\\.cl[so]\\'" . latex-mode) ;LaTeX 2e class option |
ffc0e1ca AS |
1940 | ("\\.bbl\\'" . latex-mode) |
1941 | ("\\.bib\\'" . bibtex-mode) | |
1942 | ("\\.sql\\'" . sql-mode) | |
bbc67516 | 1943 | ("\\.m[4c]\\'" . m4-mode) |
9e6f5419 DP |
1944 | ("\\.mf\\'" . metafont-mode) |
1945 | ("\\.mp\\'" . metapost-mode) | |
ffc0e1ca AS |
1946 | ("\\.vhdl?\\'" . vhdl-mode) |
1947 | ("\\.article\\'" . text-mode) | |
1948 | ("\\.letter\\'" . text-mode) | |
bbc67516 | 1949 | ("\\.i?tcl\\'" . tcl-mode) |
ffc0e1ca | 1950 | ("\\.exp\\'" . tcl-mode) |
ffc0e1ca AS |
1951 | ("\\.itk\\'" . tcl-mode) |
1952 | ("\\.icn\\'" . icon-mode) | |
1953 | ("\\.sim\\'" . simula-mode) | |
1954 | ("\\.mss\\'" . scribe-mode) | |
bbc67516 | 1955 | ("\\.f9[05]\\'" . f90-mode) |
8f9495e7 | 1956 | ("\\.indent\\.pro\\'" . fundamental-mode) ; to avoid idlwave-mode |
ffc0e1ca | 1957 | ("\\.pro\\'" . idlwave-mode) |
ffc0e1ca AS |
1958 | ("\\.prolog\\'" . prolog-mode) |
1959 | ("\\.tar\\'" . tar-mode) | |
0ee6e7b7 JL |
1960 | ;; The list of archive file extensions should be in sync with |
1961 | ;; `auto-coding-alist' with `no-conversion' coding system. | |
03210c3a EZ |
1962 | ("\\.\\(arc\\|zip\\|lzh\\|lha\\|zoo\\|[jew]ar\\|xpi\\)\\'" . archive-mode) |
1963 | ("\\.\\(ARC\\|ZIP\\|LZH\\|LHA\\|ZOO\\|[JEW]AR\\|XPI\\)\\'" . archive-mode) | |
d5040404 | 1964 | ("\\.\\(sx[dmicw]\\|odt\\)\\'" . archive-mode) ; OpenOffice.org |
ffc0e1ca AS |
1965 | ;; Mailer puts message to be edited in |
1966 | ;; /tmp/Re.... or Message | |
1967 | ("\\`/tmp/Re" . text-mode) | |
1968 | ("/Message[0-9]*\\'" . text-mode) | |
ffc0e1ca AS |
1969 | ("\\.zone\\'" . zone-mode) |
1970 | ;; some news reader is reported to use this | |
1971 | ("\\`/tmp/fol/" . text-mode) | |
ffc0e1ca AS |
1972 | ("\\.oak\\'" . scheme-mode) |
1973 | ("\\.sgml?\\'" . sgml-mode) | |
bbc67516 | 1974 | ("\\.x[ms]l\\'" . xml-mode) |
ffc0e1ca AS |
1975 | ("\\.dtd\\'" . sgml-mode) |
1976 | ("\\.ds\\(ss\\)?l\\'" . dsssl-mode) | |
bbc67516 DP |
1977 | ("\\.js\\'" . java-mode) ; javascript-mode would be better |
1978 | ("\\.x[bp]m\\'" . c-mode) | |
709d45e1 KG |
1979 | ;; .emacs or .gnus or .viper following a directory delimiter in |
1980 | ;; Unix, MSDOG or VMS syntax. | |
1981 | ("[]>:/\\]\\..*\\(emacs\\|gnus\\|viper\\)\\'" . emacs-lisp-mode) | |
ffc0e1ca AS |
1982 | ("\\`\\..*emacs\\'" . emacs-lisp-mode) |
1983 | ;; _emacs following a directory delimiter | |
1984 | ;; in MsDos syntax | |
1985 | ("[:/]_emacs\\'" . emacs-lisp-mode) | |
1986 | ("/crontab\\.X*[0-9]+\\'" . shell-script-mode) | |
1987 | ("\\.ml\\'" . lisp-mode) | |
d5798fa7 SM |
1988 | ("\\.\\(asn\\|mib\\|smi\\)\\'" . snmp-mode) |
1989 | ("\\.\\(as\\|mi\\|sm\\)2\\'" . snmpv2-mode) | |
ffc0e1ca | 1990 | ("\\.\\(diffs?\\|patch\\|rej\\)\\'" . diff-mode) |
e854cc22 | 1991 | ("\\.\\(dif\\|pat\\)\\'" . diff-mode) ; for MSDOG |
d5798fa7 | 1992 | ("\\.[eE]?[pP][sS]\\'" . ps-mode) |
e55c4863 | 1993 | ("configure\\.\\(ac\\|in\\)\\'" . autoconf-mode) |
ffc0e1ca AS |
1994 | ("BROWSE\\'" . ebrowse-tree-mode) |
1995 | ("\\.ebrowse\\'" . ebrowse-tree-mode) | |
9ee45b2c | 1996 | ("#\\*mail\\*" . mail-mode) |
80174d35 DP |
1997 | ("\\.g\\'" . antlr-mode) |
1998 | ("\\.ses\\'" . ses-mode) | |
1999 | ("\\.\\(soa\\|zone\\)\\'" . dns-mode) | |
2000 | ("\\.docbook\\'" . sgml-mode) | |
00daa381 | 2001 | ("\\.com\\'" . dcl-mode) |
80174d35 DP |
2002 | ("/config\\.\\(?:bat\\|log\\)\\'" . fundamental-mode) |
2003 | ;; Windows candidates may be opened case sensitively on Unix | |
2004 | ("\\.\\(?:[iI][nN][iI]\\|[lL][sS][tT]\\|[rR][eE][gG]\\|[sS][yY][sS]\\)\\'" . conf-mode) | |
2005 | ("\\.\\(?:desktop\\|la\\)\\'" . conf-unix-mode) | |
08adf84e | 2006 | ("\\.ppd\\'" . conf-ppd-mode) |
80174d35 DP |
2007 | ("java.+\\.conf\\'" . conf-javaprop-mode) |
2008 | ("\\.properties\\(?:\\.[a-zA-Z0-9._-]+\\)?\\'" . conf-javaprop-mode) | |
2009 | ;; *.cf, *.cfg, *.conf, *.config[.local|.de_DE.UTF8|...], */config | |
2010 | ("[/.]c\\(?:on\\)?f\\(?:i?g\\)?\\(?:\\.[a-zA-Z0-9._-]+\\)?\\'" . conf-mode) | |
a35d9075 AS |
2011 | ("\\`/etc/\\(?:DIR_COLORS\\|ethers\\|.?fstab\\|.*hosts\\|lesskey\\|login\\.?de\\(?:fs\\|vperm\\)\\|magic\\|mtab\\|pam\\.d/.*\\|permissions\\(?:\\.d/.+\\)?\\|protocols\\|rpc\\|services\\)\\'" . conf-space-mode) |
2012 | ("\\`/etc/\\(?:acpid?/.+\\|aliases\\(?:\\.d/.+\\)?\\|default/.+\\|group-?\\|hosts\\..+\\|inittab\\|ksysguarddrc\\|opera6rc\\|passwd-?\\|shadow-?\\|sysconfig/.+\\)\\'" . conf-mode) | |
80174d35 DP |
2013 | ;; either user's dot-files or under /etc or some such |
2014 | ("/\\.?\\(?:gnokiirc\\|kde.*rc\\|mime\\.types\\|wgetrc\\)\\'" . conf-mode) | |
2015 | ;; alas not all ~/.*rc files are like this | |
b14f1885 | 2016 | ("/\\.\\(?:enigma\\|gltron\\|gtk\\|hxplayer\\|net\\|neverball\\|qt/.+\\|realplayer\\|scummvm\\|sversion\\|sylpheed/.+\\|xmp\\)rc\\'" . conf-mode) |
80174d35 DP |
2017 | ("/\\.\\(?:gdbtkinit\\|grip\\|orbital/.+txt\\|rhosts\\|tuxracer/options\\)\\'" . conf-mode) |
2018 | ("/\\.?X\\(?:default\\|resource\\|re\\)s\\>" . conf-xdefaults-mode) | |
2019 | ("/X11.+app-defaults/" . conf-xdefaults-mode) | |
2020 | ("/X11.+locale/.+/Compose\\'" . conf-colon-mode) | |
2021 | ;; this contains everything twice, with space and with colon :-( | |
2022 | ("/X11.+locale/compose\\.dir\\'" . conf-javaprop-mode) | |
9ee45b2c SM |
2023 | ;; Get rid of any trailing .n.m and try again. |
2024 | ;; This is for files saved by cvs-merge that look like .#<file>.<rev> | |
5c6d31a4 SM |
2025 | ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~. |
2026 | ;; Using mode nil rather than `ignore' would let the search continue | |
2027 | ;; through this list (with the shortened name) rather than start over. | |
bbc67516 | 2028 | ("\\.~?[0-9]+\\.[0-9][-.0-9]*~?\\'" nil t) |
5c6d31a4 SM |
2029 | ;; The following should come after the ChangeLog pattern |
2030 | ;; for the sake of ChangeLog.1, etc. | |
2031 | ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too. | |
e043664a | 2032 | ("\\.[1-9]\\'" . nroff-mode) |
80174d35 | 2033 | ("\\.\\(?:orig\\|in\\|[bB][aA][kK]\\)\\'" nil t))) |
ffc0e1ca | 2034 | "Alist of filename patterns vs corresponding major mode functions. |
116987ba RS |
2035 | Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL). |
2036 | \(NON-NIL stands for anything that is not nil; the value does not matter.) | |
2037 | Visiting a file whose name matches REGEXP specifies FUNCTION as the | |
2038 | mode function to use. FUNCTION will be called, unless it is nil. | |
2039 | ||
2040 | If the element has the form (REGEXP FUNCTION NON-NIL), then after | |
2041 | calling FUNCTION (if it's not nil), we delete the suffix that matched | |
969be033 | 2042 | REGEXP and search the list again for another match. |
7b3f3dc2 | 2043 | |
969be033 RS |
2044 | If the file name matches `inhibit-first-line-modes-regexps', |
2045 | then `auto-mode-alist' is not processed. | |
2046 | ||
d5040404 EZ |
2047 | The extensions whose FUNCTION is `archive-mode' should also |
2048 | appear in `auto-coding-alist' with `no-conversion' coding system. | |
2049 | ||
969be033 RS |
2050 | See also `interpreter-mode-alist', which detects executable script modes |
2051 | based on the interpreters they specify to run, | |
2052 | and `magic-mode-alist', which determines modes based on file contents.") | |
e13322a0 | 2053 | |
d7fa5aa2 | 2054 | (defvar interpreter-mode-alist |
f209c999 MS |
2055 | ;; Note: The entries for the modes defined in cc-mode.el (awk-mode |
2056 | ;; and pike-mode) are added through autoload directives in that | |
2057 | ;; file. That way is discouraged since it spreads out the | |
2058 | ;; definition of the initial value. | |
ffc0e1ca AS |
2059 | (mapc |
2060 | (lambda (l) | |
2061 | (cons (purecopy (car l)) (cdr l))) | |
2062 | '(("perl" . perl-mode) | |
2063 | ("perl5" . perl-mode) | |
2064 | ("miniperl" . perl-mode) | |
2065 | ("wish" . tcl-mode) | |
2066 | ("wishx" . tcl-mode) | |
2067 | ("tcl" . tcl-mode) | |
2068 | ("tclsh" . tcl-mode) | |
ffc0e1ca AS |
2069 | ("scm" . scheme-mode) |
2070 | ("ash" . sh-mode) | |
2071 | ("bash" . sh-mode) | |
2072 | ("bash2" . sh-mode) | |
2073 | ("csh" . sh-mode) | |
2074 | ("dtksh" . sh-mode) | |
2075 | ("es" . sh-mode) | |
2076 | ("itcsh" . sh-mode) | |
2077 | ("jsh" . sh-mode) | |
2078 | ("ksh" . sh-mode) | |
2079 | ("oash" . sh-mode) | |
2080 | ("pdksh" . sh-mode) | |
2081 | ("rc" . sh-mode) | |
2082 | ("rpm" . sh-mode) | |
2083 | ("sh" . sh-mode) | |
2084 | ("sh5" . sh-mode) | |
2085 | ("tcsh" . sh-mode) | |
2086 | ("wksh" . sh-mode) | |
2087 | ("wsh" . sh-mode) | |
2088 | ("zsh" . sh-mode) | |
2089 | ("tail" . text-mode) | |
2090 | ("more" . text-mode) | |
2091 | ("less" . text-mode) | |
2092 | ("pg" . text-mode) | |
27a7c83f | 2093 | ("make" . makefile-gmake-mode) ; Debian uses this |
ffc0e1ca AS |
2094 | ("guile" . scheme-mode) |
2095 | ("clisp" . lisp-mode))) | |
c907d156 | 2096 | "Alist mapping interpreter names to major modes. |
969be033 | 2097 | This is used for files whose first lines match `auto-mode-interpreter-regexp'. |
c907d156 | 2098 | Each element looks like (INTERPRETER . MODE). |
9f01a773 RS |
2099 | If INTERPRETER matches the name of the interpreter specified in the first line |
2100 | of a script, mode MODE is enabled. | |
969be033 RS |
2101 | |
2102 | See also `auto-mode-alist'.") | |
c907d156 | 2103 | |
d7fa5aa2 | 2104 | (defvar inhibit-first-line-modes-regexps '("\\.tar\\'" "\\.tgz\\'") |
45fb3bb8 | 2105 | "List of regexps; if one matches a file name, don't look for `-*-'.") |
a0c9f21b | 2106 | |
d7fa5aa2 | 2107 | (defvar inhibit-first-line-modes-suffixes nil |
b20ff6d0 RS |
2108 | "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'. |
2109 | When checking `inhibit-first-line-modes-regexps', we first discard | |
2110 | from the end of the file name anything that matches one of these regexps.") | |
2111 | ||
ffc0e1ca AS |
2112 | (defvar auto-mode-interpreter-regexp |
2113 | "#![ \t]?\\([^ \t\n]*\ | |
2114 | /bin/env[ \t]\\)?\\([^ \t\n]+\\)" | |
54005870 | 2115 | "Regexp matching interpreters, for file mode determination. |
ffc0e1ca | 2116 | This regular expression is matched against the first line of a file |
54005870 LT |
2117 | to determine the file's mode in `set-auto-mode'. If it matches, the file |
2118 | is assumed to be interpreted by the interpreter matched by the second group | |
2119 | of the regular expression. The mode is then determined as the mode | |
2120 | associated with that interpreter in `interpreter-mode-alist'.") | |
0720b68b | 2121 | |
4ac1d37a | 2122 | (defvar magic-mode-alist |
a3f83992 | 2123 | `((image-type-auto-detected-p . image-mode) |
10ffa2a1 | 2124 | ;; The < comes before the groups (but the first) to reduce backtracking. |
4ac1d37a | 2125 | ;; TODO: UTF-16 <?xml may be preceded by a BOM 0xff 0xfe or 0xfe 0xff. |
efaa82ff | 2126 | ;; We use [ \t\r\n] instead of `\\s ' to make regex overflow less likely. |
32a0479a | 2127 | (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)") |
efaa82ff GM |
2128 | (comment-re (concat "\\(?:!--" incomment-re "*-->[ \t\r\n]*<\\)"))) |
2129 | (concat "\\(?:<\\?xml[ \t\r\n]+[^>]*>\\)?[ \t\r\n]*<" | |
32a0479a | 2130 | comment-re "*" |
efaa82ff | 2131 | "\\(?:!DOCTYPE[ \t\r\n]+[^>]*>[ \t\r\n]*<[ \t\r\n]*" comment-re "*\\)?" |
969be033 RS |
2132 | "[Hh][Tt][Mm][Ll]")) |
2133 | . html-mode) | |
815fde34 | 2134 | ("<!DOCTYPE[ \t\r\n]+[Hh][Tt][Mm][Ll]" . html-mode) |
4ac1d37a DP |
2135 | ;; These two must come after html, because they are more general: |
2136 | ("<\\?xml " . xml-mode) | |
811cab86 | 2137 | (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)") |
e7d313a0 GM |
2138 | (comment-re (concat "\\(?:!--" incomment-re "*-->[ \t\r\n]*<\\)"))) |
2139 | (concat "[ \t\r\n]*<" comment-re "*!DOCTYPE ")) | |
969be033 | 2140 | . sgml-mode) |
12333e2b | 2141 | ("%!PS" . ps-mode) |
80174d35 DP |
2142 | ("# xmcd " . conf-unix-mode)) |
2143 | "Alist of buffer beginnings vs. corresponding major mode functions. | |
10ffa2a1 KS |
2144 | Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION). |
2145 | After visiting a file, if REGEXP matches the text at the beginning of the | |
2146 | buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will | |
2147 | call FUNCTION rather than allowing `auto-mode-alist' to decide the buffer's | |
2148 | major mode. | |
44dce0fb RS |
2149 | |
2150 | If FUNCTION is nil, then it is not called. (That is a way of saying | |
26b9ecbc | 2151 | \"allow `auto-mode-alist' to decide for these files.\")") |
eb0455ab | 2152 | (put 'magic-mode-alist 'risky-local-variable t) |
bbc67516 | 2153 | |
14774875 RS |
2154 | (defvar file-start-mode-alist |
2155 | nil | |
2156 | "Like `magic-mode-alist' but has lower priority than `auto-mode-alist'. | |
2157 | Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION). | |
2158 | After visiting a file, if REGEXP matches the text at the beginning of the | |
2159 | buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will | |
2160 | call FUNCTION, provided that `magic-mode-alist' and `auto-mode-alist' | |
2161 | have not specified a mode for this file. | |
2162 | ||
2163 | If FUNCTION is nil, then it is not called.") | |
2164 | (put 'file-start-mode-alist 'risky-local-variable t) | |
2165 | ||
5cce080e | 2166 | (defvar magic-mode-regexp-match-limit 4000 |
14774875 RS |
2167 | "Upper limit on `magic-mode-alist' regexp matches. |
2168 | Also applies to `file-start-mode-alist'.") | |
5cce080e | 2169 | |
9e6f5419 | 2170 | (defun set-auto-mode (&optional keep-mode-if-same) |
b4da00e9 | 2171 | "Select major mode appropriate for current buffer. |
4ac1d37a | 2172 | |
bbc67516 DP |
2173 | This checks for a -*- mode tag in the buffer's text, checks the |
2174 | interpreter that runs this file against `interpreter-mode-alist', | |
811cab86 JL |
2175 | compares the buffer beginning against `magic-mode-alist', or |
2176 | compares the filename against the entries in `auto-mode-alist'. | |
e3998da1 RS |
2177 | |
2178 | It does not check for the `mode:' local variable in the | |
2179 | Local Variables section of the file; for that, use `hack-local-variables'. | |
7b3f3dc2 | 2180 | |
f3e23606 | 2181 | If `enable-local-variables' is nil, this function does not check for a |
9de9b6a2 RS |
2182 | -*- mode tag. |
2183 | ||
521cf174 DP |
2184 | If the optional argument KEEP-MODE-IF-SAME is non-nil, then we |
2185 | only set the major mode, if that would change it." | |
b4da00e9 | 2186 | ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- |
811cab86 | 2187 | (let (end done mode modes) |
9e6f5419 DP |
2188 | ;; Find a -*- mode tag |
2189 | (save-excursion | |
2190 | (goto-char (point-min)) | |
2191 | (skip-chars-forward " \t\n") | |
9e6f5419 DP |
2192 | (and enable-local-variables |
2193 | (setq end (set-auto-mode-1)) | |
2194 | (if (save-excursion (search-forward ":" end t)) | |
2195 | ;; Find all specifications for the `mode:' variable | |
2196 | ;; and execute them left to right. | |
2197 | (while (let ((case-fold-search t)) | |
2198 | (or (and (looking-at "mode:") | |
2199 | (goto-char (match-end 0))) | |
2200 | (re-search-forward "[ \t;]mode:" end t))) | |
2201 | (skip-chars-forward " \t") | |
2202 | (let ((beg (point))) | |
2203 | (if (search-forward ";" end t) | |
2204 | (forward-char -1) | |
2205 | (goto-char end)) | |
2206 | (skip-chars-backward " \t") | |
2207 | (push (intern (concat (downcase (buffer-substring beg (point))) "-mode")) | |
2208 | modes))) | |
2209 | ;; Simple -*-MODE-*- case. | |
2210 | (push (intern (concat (downcase (buffer-substring (point) end)) | |
2211 | "-mode")) | |
2212 | modes)))) | |
2213 | ;; If we found modes to use, invoke them now, outside the save-excursion. | |
2214 | (if modes | |
521cf174 DP |
2215 | (catch 'nop |
2216 | (dolist (mode (nreverse modes)) | |
2217 | (if (not (functionp mode)) | |
2218 | (message "Ignoring unknown mode `%s'" mode) | |
2219 | (setq done t) | |
3467488e | 2220 | (or (set-auto-mode-0 mode keep-mode-if-same) |
df4d0613 | 2221 | ;; continuing would call minor modes again, toggling them off |
ec6328a2 | 2222 | (throw 'nop nil)))))) |
14774875 RS |
2223 | ;; If we didn't, look for an interpreter specified in the first line. |
2224 | ;; As a special case, allow for things like "#!/bin/env perl", which | |
2225 | ;; finds the interpreter anywhere in $PATH. | |
ec6328a2 | 2226 | (unless done |
9e6f5419 DP |
2227 | (setq mode (save-excursion |
2228 | (goto-char (point-min)) | |
2229 | (if (looking-at auto-mode-interpreter-regexp) | |
2230 | (match-string 2) | |
2231 | "")) | |
2232 | ;; Map interpreter name to a mode, signalling we're done at the | |
2233 | ;; same time. | |
2234 | done (assoc (file-name-nondirectory mode) | |
df4d0613 | 2235 | interpreter-mode-alist)) |
811cab86 | 2236 | ;; If we found an interpreter mode to use, invoke it now. |
df4d0613 DP |
2237 | (if done |
2238 | (set-auto-mode-0 (cdr done) keep-mode-if-same))) | |
14774875 | 2239 | ;; Next try matching the buffer beginning against magic-mode-alist. |
df4d0613 | 2240 | (unless done |
4ac1d37a DP |
2241 | (if (setq done (save-excursion |
2242 | (goto-char (point-min)) | |
5cce080e KS |
2243 | (save-restriction |
2244 | (narrow-to-region (point-min) | |
2245 | (min (point-max) | |
2246 | (+ (point-min) magic-mode-regexp-match-limit))) | |
2247 | (assoc-default nil magic-mode-alist | |
2248 | (lambda (re dummy) | |
10ffa2a1 KS |
2249 | (if (functionp re) |
2250 | (funcall re) | |
2251 | (looking-at re))))))) | |
14774875 RS |
2252 | (set-auto-mode-0 done keep-mode-if-same))) |
2253 | ;; Next compare the filename against the entries in auto-mode-alist. | |
2254 | (unless done | |
2255 | (if buffer-file-name | |
2256 | (let ((name buffer-file-name)) | |
2257 | ;; Remove backup-suffixes from file name. | |
2258 | (setq name (file-name-sans-versions name)) | |
2259 | (while name | |
2260 | ;; Find first matching alist entry. | |
2261 | (setq mode | |
2262 | (if (memq system-type '(vax-vms windows-nt cygwin)) | |
2263 | ;; System is case-insensitive. | |
2264 | (let ((case-fold-search t)) | |
2265 | (assoc-default name auto-mode-alist | |
2266 | 'string-match)) | |
2267 | ;; System is case-sensitive. | |
2268 | (or | |
2269 | ;; First match case-sensitively. | |
2270 | (let ((case-fold-search nil)) | |
2271 | (assoc-default name auto-mode-alist | |
2272 | 'string-match)) | |
2273 | ;; Fallback to case-insensitive match. | |
2274 | (and auto-mode-case-fold | |
2275 | (let ((case-fold-search t)) | |
2276 | (assoc-default name auto-mode-alist | |
2277 | 'string-match)))))) | |
2278 | (if (and mode | |
2279 | (consp mode) | |
2280 | (cadr mode)) | |
2281 | (setq mode (car mode) | |
2282 | name (substring name 0 (match-beginning 0))) | |
2283 | (setq name)) | |
2284 | (when mode | |
2285 | (set-auto-mode-0 mode keep-mode-if-same) | |
2286 | (setq done t)))))) | |
2287 | ;; Next try matching the buffer beginning against file-start-mode-alist. | |
2288 | (unless done | |
2289 | (if (setq done (save-excursion | |
2290 | (goto-char (point-min)) | |
2291 | (save-restriction | |
2292 | (narrow-to-region (point-min) | |
2293 | (min (point-max) | |
2294 | (+ (point-min) magic-mode-regexp-match-limit))) | |
2295 | (assoc-default nil file-start-mode-alist | |
2296 | (lambda (re dummy) | |
2297 | (if (functionp re) | |
2298 | (funcall re) | |
2299 | (looking-at re))))))) | |
2300 | (set-auto-mode-0 done keep-mode-if-same))))) | |
521cf174 | 2301 | |
521cf174 DP |
2302 | ;; When `keep-mode-if-same' is set, we are working on behalf of |
2303 | ;; set-visited-file-name. In that case, if the major mode specified is the | |
2304 | ;; same one we already have, don't actually reset it. We don't want to lose | |
2305 | ;; minor modes such as Font Lock. | |
3467488e | 2306 | (defun set-auto-mode-0 (mode &optional keep-mode-if-same) |
521cf174 | 2307 | "Apply MODE and return it. |
3467488e KS |
2308 | If optional arg KEEP-MODE-IF-SAME is non-nil, MODE is chased of |
2309 | any aliases and compared to current major mode. If they are the | |
2310 | same, do nothing and return nil." | |
0c7c413c CY |
2311 | (unless (and keep-mode-if-same |
2312 | (eq (indirect-function mode) | |
2313 | (indirect-function major-mode))) | |
2314 | (when mode | |
2315 | (funcall mode) | |
2316 | mode))) | |
b4da00e9 | 2317 | |
e3f9b9c0 RS |
2318 | (defun set-auto-mode-1 () |
2319 | "Find the -*- spec in the buffer. | |
2320 | Call with point at the place to start searching from. | |
2321 | If one is found, set point to the beginning | |
2322 | and return the position of the end. | |
2323 | Otherwise, return nil; point may be changed." | |
2324 | (let (beg end) | |
2325 | (and | |
2326 | ;; Don't look for -*- if this file name matches any | |
2327 | ;; of the regexps in inhibit-first-line-modes-regexps. | |
2328 | (let ((temp inhibit-first-line-modes-regexps) | |
2329 | (name (if buffer-file-name | |
2330 | (file-name-sans-versions buffer-file-name) | |
2331 | (buffer-name)))) | |
2332 | (while (let ((sufs inhibit-first-line-modes-suffixes)) | |
2333 | (while (and sufs (not (string-match (car sufs) name))) | |
2334 | (setq sufs (cdr sufs))) | |
2335 | sufs) | |
2336 | (setq name (substring name 0 (match-beginning 0)))) | |
2337 | (while (and temp | |
2338 | (not (string-match (car temp) name))) | |
2339 | (setq temp (cdr temp))) | |
2340 | (not temp)) | |
2341 | ||
f587e30b SM |
2342 | (search-forward "-*-" (line-end-position |
2343 | ;; If the file begins with "#!" | |
2344 | ;; (exec interpreter magic), look | |
2345 | ;; for mode frobs in the first two | |
2346 | ;; lines. You cannot necessarily | |
2347 | ;; put them in the first line of | |
2348 | ;; such a file without screwing up | |
2349 | ;; the interpreter invocation. | |
2350 | (and (looking-at "^#!") 2)) t) | |
e3f9b9c0 RS |
2351 | (progn |
2352 | (skip-chars-forward " \t") | |
2353 | (setq beg (point)) | |
f587e30b | 2354 | (search-forward "-*-" (line-end-position) t)) |
e3f9b9c0 RS |
2355 | (progn |
2356 | (forward-char -3) | |
2357 | (skip-chars-backward " \t") | |
2358 | (setq end (point)) | |
2359 | (goto-char beg) | |
2360 | end)))) | |
b9e1451a CY |
2361 | \f |
2362 | ;;; Handling file local variables | |
2363 | ||
2364 | (defvar ignored-local-variables | |
2365 | '(ignored-local-variables safe-local-variable-values) | |
2366 | "Variables to be ignored in a file's local variable spec.") | |
2367 | ||
2368 | (defvar hack-local-variables-hook nil | |
2369 | "Normal hook run after processing a file's local variables specs. | |
2370 | Major modes can use this to examine user-specified local variables | |
2371 | in order to initialize other data structure based on them.") | |
2372 | ||
2373 | (defcustom safe-local-variable-values nil | |
2374 | "List variable-value pairs that are considered safe. | |
2375 | Each element is a cons cell (VAR . VAL), where VAR is a variable | |
2376 | symbol and VAL is a value that is considered safe." | |
2377 | :group 'find-file | |
2378 | :type 'alist) | |
2379 | ||
2380 | (defcustom safe-local-eval-forms nil | |
ba83982b | 2381 | "Expressions that are considered safe in an `eval:' local variable. |
b9e1451a CY |
2382 | Add expressions to this list if you want Emacs to evaluate them, when |
2383 | they appear in an `eval' local variable specification, without first | |
2384 | asking you for confirmation." | |
2385 | :group 'find-file | |
2386 | :version "22.1" | |
2387 | :type '(repeat sexp)) | |
2388 | ||
2389 | ;; Risky local variables: | |
2390 | (mapc (lambda (var) (put var 'risky-local-variable t)) | |
2391 | '(after-load-alist | |
2392 | auto-mode-alist | |
2393 | buffer-auto-save-file-name | |
2394 | buffer-file-name | |
2395 | buffer-file-truename | |
2396 | buffer-undo-list | |
2397 | dabbrev-case-fold-search | |
2398 | dabbrev-case-replace | |
2399 | debugger | |
2400 | default-text-properties | |
2401 | display-time-string | |
2402 | enable-local-eval | |
e58cec15 | 2403 | enable-local-variables |
b9e1451a CY |
2404 | eval |
2405 | exec-directory | |
2406 | exec-path | |
2407 | file-name-handler-alist | |
2408 | font-lock-defaults | |
2409 | format-alist | |
2410 | frame-title-format | |
2411 | global-mode-string | |
2412 | header-line-format | |
2413 | icon-title-format | |
2414 | ignored-local-variables | |
2415 | imenu--index-alist | |
2416 | imenu-generic-expression | |
2417 | inhibit-quit | |
2418 | input-method-alist | |
2419 | load-path | |
2420 | max-lisp-eval-depth | |
2421 | max-specpdl-size | |
2422 | minor-mode-alist | |
2423 | minor-mode-map-alist | |
2424 | minor-mode-overriding-map-alist | |
2425 | mode-line-buffer-identification | |
2426 | mode-line-format | |
2427 | mode-line-modes | |
2428 | mode-line-modified | |
2429 | mode-line-mule-info | |
2430 | mode-line-position | |
2431 | mode-line-process | |
2432 | mode-name | |
2433 | outline-level | |
2434 | overriding-local-map | |
2435 | overriding-terminal-local-map | |
2436 | parse-time-rules | |
2437 | process-environment | |
2438 | rmail-output-file-alist | |
e58cec15 RS |
2439 | safe-local-variable-values |
2440 | safe-local-eval-forms | |
b9e1451a CY |
2441 | save-some-buffers-action-alist |
2442 | special-display-buffer-names | |
2443 | standard-input | |
2444 | standard-output | |
2445 | unread-command-events | |
2446 | vc-mode)) | |
2447 | ||
2448 | ;; Safe local variables: | |
2449 | ;; | |
3e457225 RS |
2450 | ;; For variables defined by major modes, the safety declarations can go into |
2451 | ;; the major mode's file, since that will be loaded before file variables are | |
2452 | ;; processed. | |
2453 | ;; | |
2454 | ;; For variables defined by minor modes, put the safety declarations in the | |
2455 | ;; file defining the minor mode after the defcustom/defvar using an autoload | |
2456 | ;; cookie, e.g.: | |
2457 | ;; | |
2458 | ;; ;;;###autoload(put 'variable 'safe-local-variable 'stringp) | |
2459 | ;; | |
2460 | ;; Otherwise, when Emacs visits a file specifying that local variable, the | |
2461 | ;; minor mode file may not be loaded yet. | |
2462 | ;; | |
2463 | ;; For variables defined in the C source code the declaration should go here: | |
b9e1451a | 2464 | |
0a51c121 JL |
2465 | (mapc (lambda (pair) |
2466 | (put (car pair) 'safe-local-variable (cdr pair))) | |
4b025f47 CY |
2467 | '((buffer-read-only . booleanp) ;; C source code |
2468 | (default-directory . stringp) ;; C source code | |
2469 | (fill-column . integerp) ;; C source code | |
2470 | (indent-tabs-mode . booleanp) ;; C source code | |
2471 | (left-margin . integerp) ;; C source code | |
2472 | (no-update-autoloads . booleanp) | |
2473 | (tab-width . integerp) ;; C source code | |
2474 | (truncate-lines . booleanp))) ;; C source code | |
b9e1451a CY |
2475 | |
2476 | (put 'c-set-style 'safe-local-eval-function t) | |
e3f9b9c0 | 2477 | |
5a6c1d87 CY |
2478 | (defun hack-local-variables-confirm (vars unsafe-vars risky-vars) |
2479 | (if noninteractive | |
2480 | nil | |
2481 | (let ((name (if buffer-file-name | |
2482 | (file-name-nondirectory buffer-file-name) | |
2483 | (concat "buffer " (buffer-name)))) | |
af467e28 | 2484 | (offer-save (and (eq enable-local-variables t) unsafe-vars)) |
0a158521 | 2485 | prompt char) |
5a6c1d87 | 2486 | (save-window-excursion |
0a158521 | 2487 | (let ((buf (get-buffer-create "*Local Variables*"))) |
42078bb2 CY |
2488 | (pop-to-buffer buf) |
2489 | (set (make-local-variable 'cursor-type) nil) | |
2490 | (erase-buffer) | |
5a6c1d87 | 2491 | (if unsafe-vars |
42078bb2 CY |
2492 | (insert "The local variables list in " name |
2493 | "\ncontains values that may not be safe (*)" | |
2494 | (if risky-vars | |
2495 | ", and variables that are risky (**)." | |
2496 | ".")) | |
5a6c1d87 | 2497 | (if risky-vars |
42078bb2 CY |
2498 | (insert "The local variables list in " name |
2499 | "\ncontains variables that are risky (**).") | |
2500 | (insert "A local variables list is specified in " name "."))) | |
2501 | (insert "\n\nDo you want to apply it? You can type | |
5a6c1d87 | 2502 | y -- to apply the local variables list. |
af467e28 CY |
2503 | n -- to ignore the local variables list.") |
2504 | (if offer-save | |
2505 | (insert " | |
dbcd3ce0 EZ |
2506 | ! -- to apply the local variables list, and permanently mark these |
2507 | values (*) as safe (in the future, they will be set automatically.)\n\n") | |
af467e28 | 2508 | (insert "\n\n")) |
5a6c1d87 CY |
2509 | (dolist (elt vars) |
2510 | (cond ((member elt unsafe-vars) | |
42078bb2 | 2511 | (insert " * ")) |
5a6c1d87 | 2512 | ((member elt risky-vars) |
42078bb2 | 2513 | (insert " ** ")) |
5a6c1d87 | 2514 | (t |
42078bb2 CY |
2515 | (insert " "))) |
2516 | (princ (car elt) buf) | |
2517 | (insert " : ") | |
e442c62b SM |
2518 | ;; Make strings with embedded whitespace easier to read. |
2519 | (let ((print-escape-newlines t)) | |
2520 | (prin1 (cdr elt) buf)) | |
42078bb2 | 2521 | (insert "\n")) |
af467e28 CY |
2522 | (setq prompt |
2523 | (format "Please type %s%s: " | |
2524 | (if offer-save "y, n, or !" "y or n") | |
2525 | (if (< (line-number-at-pos) (window-body-height)) | |
2526 | "" | |
2527 | ", or C-v to scroll"))) | |
2528 | (goto-char (point-min)) | |
a5ce12c3 | 2529 | (let ((cursor-in-echo-area t) |
5340648d | 2530 | (executing-kbd-macro executing-kbd-macro) |
af467e28 CY |
2531 | (exit-chars |
2532 | (if offer-save '(?! ?y ?n ?\s ?\C-g) '(?y ?n ?\s ?\C-g))) | |
42078bb2 CY |
2533 | done) |
2534 | (while (not done) | |
2535 | (message prompt) | |
2536 | (setq char (read-event)) | |
2537 | (if (numberp char) | |
5340648d CY |
2538 | (cond ((eq char ?\C-v) |
2539 | (condition-case nil | |
2540 | (scroll-up) | |
2541 | (error (goto-char (point-min))))) | |
2542 | ;; read-event returns -1 if we are in a kbd | |
2543 | ;; macro and there are no more events in the | |
2544 | ;; macro. In that case, attempt to get an | |
2545 | ;; event interactively. | |
2546 | ((and executing-kbd-macro (= char -1)) | |
2547 | (setq executing-kbd-macro nil)) | |
2548 | (t (setq done (memq (downcase char) exit-chars))))))) | |
42078bb2 | 2549 | (setq char (downcase char)) |
af467e28 | 2550 | (when (and offer-save (= char ?!) unsafe-vars) |
42078bb2 CY |
2551 | (dolist (elt unsafe-vars) |
2552 | (add-to-list 'safe-local-variable-values elt)) | |
4299d849 CY |
2553 | ;; When this is called from desktop-restore-file-buffer, |
2554 | ;; coding-system-for-read may be non-nil. Reset it before | |
2555 | ;; writing to .emacs. | |
af467e28 CY |
2556 | (if (or custom-file user-init-file) |
2557 | (let ((coding-system-for-read nil)) | |
2558 | (customize-save-variable | |
2559 | 'safe-local-variable-values | |
2560 | safe-local-variable-values)))) | |
0a158521 | 2561 | (kill-buffer buf) |
42078bb2 CY |
2562 | (or (= char ?!) |
2563 | (= char ?\s) | |
2564 | (= char ?y))))))) | |
cc45837e | 2565 | |
a0e74e72 | 2566 | (defun hack-local-variables-prop-line (&optional mode-only) |
5a6c1d87 | 2567 | "Return local variables specified in the -*- line. |
ffc0e1ca AS |
2568 | Ignore any specification for `mode:' and `coding:'; |
2569 | `set-auto-mode' should already have handled `mode:', | |
a0e74e72 | 2570 | `set-auto-coding' should already have handled `coding:'. |
5a6c1d87 CY |
2571 | |
2572 | If MODE-ONLY is non-nil, all we do is check whether the major | |
2573 | mode is specified, returning t if it is specified. Otherwise, | |
2574 | return an alist of elements (VAR . VAL), where VAR is a variable | |
2575 | and VAL is the specified value." | |
f3e23606 RS |
2576 | (save-excursion |
2577 | (goto-char (point-min)) | |
5a6c1d87 CY |
2578 | (let ((end (set-auto-mode-1)) |
2579 | result mode-specified) | |
a0e74e72 RS |
2580 | ;; Parse the -*- line into the RESULT alist. |
2581 | ;; Also set MODE-SPECIFIED if we see a spec or `mode'. | |
e3f9b9c0 | 2582 | (cond ((not end) |
f3e23606 RS |
2583 | nil) |
2584 | ((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)") | |
13a66180 | 2585 | ;; Simple form: "-*- MODENAME -*-". Already handled. |
a0e74e72 | 2586 | (setq mode-specified t) |
13a66180 | 2587 | nil) |
f3e23606 RS |
2588 | (t |
2589 | ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-' | |
2590 | ;; (last ";" is optional). | |
f3e23606 RS |
2591 | (while (< (point) end) |
2592 | (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*") | |
ffc0e1ca | 2593 | (error "Malformed -*- line")) |
f3e23606 | 2594 | (goto-char (match-end 0)) |
1c26a6f3 KH |
2595 | ;; There used to be a downcase here, |
2596 | ;; but the manual didn't say so, | |
2597 | ;; and people want to set var names that aren't all lc. | |
e442c62b | 2598 | (let ((key (intern (match-string 1))) |
f3e23606 RS |
2599 | (val (save-restriction |
2600 | (narrow-to-region (point) end) | |
2601 | (read (current-buffer))))) | |
93a2702d RS |
2602 | ;; It is traditional to ignore |
2603 | ;; case when checking for `mode' in set-auto-mode, | |
2604 | ;; so we must do that here as well. | |
2605 | ;; That is inconsistent, but we're stuck with it. | |
1314c787 | 2606 | ;; The same can be said for `coding' in set-auto-coding. |
5a6c1d87 CY |
2607 | (or (and (equal (downcase (symbol-name key)) "mode") |
2608 | (setq mode-specified t)) | |
3fa0a9aa | 2609 | (equal (downcase (symbol-name key)) "coding") |
5a6c1d87 CY |
2610 | (condition-case nil |
2611 | (push (cons (if (eq key 'eval) | |
2612 | 'eval | |
2613 | (indirect-variable key)) | |
2614 | val) result) | |
2615 | (error nil))) | |
2616 | (skip-chars-forward " \t;"))))) | |
2617 | ||
2618 | (if mode-only | |
2619 | mode-specified | |
2620 | result)))) | |
f3e23606 | 2621 | |
9de9b6a2 RS |
2622 | (defun hack-local-variables (&optional mode-only) |
2623 | "Parse and put into effect this buffer's local variables spec. | |
2624 | If MODE-ONLY is non-nil, all we do is check whether the major mode | |
2625 | is specified, returning t if it is specified." | |
5a6c1d87 CY |
2626 | (let ((enable-local-variables |
2627 | (and local-enable-local-variables enable-local-variables)) | |
2628 | result) | |
2629 | (when (or mode-only enable-local-variables) | |
2630 | (setq result (hack-local-variables-prop-line mode-only)) | |
2631 | ;; Look for "Local variables:" line in last page. | |
2632 | (save-excursion | |
2633 | (goto-char (point-max)) | |
2634 | (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) | |
2635 | 'move) | |
2636 | (when (let ((case-fold-search t)) | |
2637 | (search-forward "Local Variables:" nil t)) | |
2638 | (skip-chars-forward " \t") | |
2639 | ;; suffix is what comes after "local variables:" in its line. | |
2640 | ;; prefix is what comes before "local variables:" in its line. | |
2641 | (let ((suffix | |
2642 | (concat | |
2643 | (regexp-quote (buffer-substring (point) | |
2644 | (line-end-position))) | |
2645 | "$")) | |
2646 | (prefix | |
2647 | (concat "^" (regexp-quote | |
2648 | (buffer-substring (line-beginning-position) | |
2649 | (match-beginning 0))))) | |
2650 | beg) | |
2651 | ||
2652 | (forward-line 1) | |
2653 | (let ((startpos (point)) | |
2654 | endpos | |
2655 | (thisbuf (current-buffer))) | |
2656 | (save-excursion | |
2657 | (unless (let ((case-fold-search t)) | |
2658 | (re-search-forward | |
2659 | (concat prefix "[ \t]*End:[ \t]*" suffix) | |
2660 | nil t)) | |
2661 | (error "Local variables list is not properly terminated")) | |
2662 | (beginning-of-line) | |
2663 | (setq endpos (point))) | |
2664 | ||
2665 | (with-temp-buffer | |
2666 | (insert-buffer-substring thisbuf startpos endpos) | |
2667 | (goto-char (point-min)) | |
2668 | (subst-char-in-region (point) (point-max) ?\^m ?\n) | |
2669 | (while (not (eobp)) | |
2670 | ;; Discard the prefix. | |
2671 | (if (looking-at prefix) | |
2672 | (delete-region (point) (match-end 0)) | |
2673 | (error "Local variables entry is missing the prefix")) | |
2674 | (end-of-line) | |
2675 | ;; Discard the suffix. | |
2676 | (if (looking-back suffix) | |
2677 | (delete-region (match-beginning 0) (point)) | |
2678 | (error "Local variables entry is missing the suffix")) | |
2679 | (forward-line 1)) | |
2680 | (goto-char (point-min)) | |
2681 | ||
2682 | (while (not (eobp)) | |
2683 | ;; Find the variable name; strip whitespace. | |
2684 | (skip-chars-forward " \t") | |
2685 | (setq beg (point)) | |
2686 | (skip-chars-forward "^:\n") | |
2687 | (if (eolp) (error "Missing colon in local variables entry")) | |
2688 | (skip-chars-backward " \t") | |
2689 | (let* ((str (buffer-substring beg (point))) | |
2690 | (var (read str)) | |
2691 | val) | |
2692 | ;; Read the variable value. | |
2693 | (skip-chars-forward "^:") | |
2694 | (forward-char 1) | |
2695 | (setq val (read (current-buffer))) | |
2696 | (if mode-only | |
2697 | (if (eq var 'mode) | |
2698 | (setq result t)) | |
1314c787 | 2699 | (unless (eq var 'coding) |
5a6c1d87 CY |
2700 | (condition-case nil |
2701 | (push (cons (if (eq var 'eval) | |
2702 | 'eval | |
2703 | (indirect-variable var)) | |
2704 | val) result) | |
2705 | (error nil))))) | |
2706 | (forward-line 1))))))) | |
2707 | ||
2708 | ;; We've read all the local variables. Now, return whether the | |
2709 | ;; mode is specified (if MODE-ONLY is non-nil), or set the | |
2710 | ;; variables (if MODE-ONLY is nil.) | |
2711 | (if mode-only | |
2712 | result | |
d450f2a2 CY |
2713 | (dolist (ignored ignored-local-variables) |
2714 | (setq result (assq-delete-all ignored result))) | |
2715 | (if (null enable-local-eval) | |
2716 | (setq result (assq-delete-all 'eval result))) | |
dd60bebe CY |
2717 | (when result |
2718 | (setq result (nreverse result)) | |
dd60bebe CY |
2719 | ;; Find those variables that we may want to save to |
2720 | ;; `safe-local-variable-values'. | |
2721 | (let (risky-vars unsafe-vars) | |
2722 | (dolist (elt result) | |
2723 | (let ((var (car elt)) | |
2724 | (val (cdr elt))) | |
2725 | (or (eq var 'mode) | |
2726 | (and (eq var 'eval) | |
2727 | (or (eq enable-local-eval t) | |
2728 | (hack-one-local-variable-eval-safep | |
2729 | (eval (quote val))))) | |
2730 | (safe-local-variable-p var val) | |
2731 | (and (risky-local-variable-p var val) | |
2732 | (push elt risky-vars)) | |
2733 | (push elt unsafe-vars)))) | |
a5ce12c3 RS |
2734 | (if (eq enable-local-variables :safe) |
2735 | ;; If caller wants only the safe variables, | |
2736 | ;; install only them. | |
dd60bebe | 2737 | (dolist (elt result) |
a5ce12c3 RS |
2738 | (unless (or (memq (car elt) unsafe-vars) |
2739 | (memq (car elt) risky-vars)) | |
2740 | (hack-one-local-variable (car elt) (cdr elt)))) | |
2741 | ;; Query, except in the case where all are known safe | |
2742 | ;; if the user wants no quuery in that case. | |
2743 | (if (or (and (eq enable-local-variables t) | |
2744 | (null unsafe-vars) | |
2745 | (null risky-vars)) | |
e58cec15 | 2746 | (eq enable-local-variables :all) |
a5ce12c3 RS |
2747 | (hack-local-variables-confirm |
2748 | result unsafe-vars risky-vars)) | |
2749 | (dolist (elt result) | |
a548f3d7 CY |
2750 | (hack-one-local-variable (car elt) (cdr elt))))))) |
2751 | (run-hooks 'hack-local-variables-hook))))) | |
5a6c1d87 | 2752 | |
5a6c1d87 CY |
2753 | (defun safe-local-variable-p (sym val) |
2754 | "Non-nil if SYM is safe as a file-local variable with value VAL. | |
2755 | It is safe if any of these conditions are met: | |
2756 | ||
2757 | * There is a matching entry (SYM . VAL) in the | |
2758 | `safe-local-variable-values' user option. | |
2759 | ||
5a6c1d87 CY |
2760 | * The `safe-local-variable' property of SYM is a function that |
2761 | evaluates to a non-nil value with VAL as an argument." | |
2762 | (or (member (cons sym val) safe-local-variable-values) | |
2763 | (let ((safep (get sym 'safe-local-variable))) | |
80aa4695 | 2764 | (and (functionp safep) (funcall safep val))))) |
5a6c1d87 CY |
2765 | |
2766 | (defun risky-local-variable-p (sym &optional ignored) | |
2767 | "Non-nil if SYM could be dangerous as a file-local variable. | |
2768 | It is dangerous if either of these conditions are met: | |
2769 | ||
2770 | * Its `risky-local-variable' property is non-nil. | |
2771 | ||
2772 | * Its name ends with \"hook(s)\", \"function(s)\", \"form(s)\", \"map\", | |
2773 | \"program\", \"command(s)\", \"predicate(s)\", \"frame-alist\", | |
cc5a104d RS |
2774 | \"mode-alist\", \"font-lock-(syntactic-)keyword*\", |
2775 | \"map-alist\", or \"bindat-spec\"." | |
f36d46ca RS |
2776 | ;; If this is an alias, check the base name. |
2777 | (condition-case nil | |
2778 | (setq sym (indirect-variable sym)) | |
2779 | (error nil)) | |
5a6c1d87 CY |
2780 | (or (get sym 'risky-local-variable) |
2781 | (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|\ | |
2782 | -commands?$\\|-predicates?$\\|font-lock-keywords$\\|font-lock-keywords\ | |
2783 | -[0-9]+$\\|font-lock-syntactic-keywords$\\|-frame-alist$\\|-mode-alist$\\|\ | |
cc5a104d | 2784 | -map$\\|-map-alist$\\|-bindat-spec$" (symbol-name sym)))) |
7ed9159a | 2785 | |
d0bd3513 RS |
2786 | (defun hack-one-local-variable-quotep (exp) |
2787 | (and (consp exp) (eq (car exp) 'quote) (consp (cdr exp)))) | |
2788 | ||
ff7affeb RS |
2789 | (defun hack-one-local-variable-constantp (exp) |
2790 | (or (and (not (symbolp exp)) (not (consp exp))) | |
2791 | (memq exp '(t nil)) | |
2792 | (keywordp exp) | |
2793 | (hack-one-local-variable-quotep exp))) | |
2794 | ||
2795 | (defun hack-one-local-variable-eval-safep (exp) | |
2796 | "Return t if it is safe to eval EXP when it is found in a file." | |
8fd9c174 RS |
2797 | (or (not (consp exp)) |
2798 | ;; Detect certain `put' expressions. | |
2799 | (and (eq (car exp) 'put) | |
2800 | (hack-one-local-variable-quotep (nth 1 exp)) | |
2801 | (hack-one-local-variable-quotep (nth 2 exp)) | |
bc5d1dfb EZ |
2802 | (let ((prop (nth 1 (nth 2 exp))) (val (nth 3 exp))) |
2803 | (cond ((eq prop 'lisp-indent-hook) | |
2804 | ;; Only allow safe values of lisp-indent-hook; | |
2805 | ;; not functions. | |
2806 | (or (numberp val) (equal val ''defun))) | |
2807 | ((eq prop 'edebug-form-spec) | |
2808 | ;; Only allow indirect form specs. | |
b486a098 SM |
2809 | ;; During bootstrapping, edebug-basic-spec might not be |
2810 | ;; defined yet. | |
2811 | (and (fboundp 'edebug-basic-spec) | |
f215a02f AS |
2812 | (hack-one-local-variable-quotep val) |
2813 | (edebug-basic-spec (nth 1 val))))))) | |
8fd9c174 RS |
2814 | ;; Allow expressions that the user requested. |
2815 | (member exp safe-local-eval-forms) | |
2816 | ;; Certain functions can be allowed with safe arguments | |
2817 | ;; or can specify verification functions to try. | |
2818 | (and (symbolp (car exp)) | |
2819 | (let ((prop (get (car exp) 'safe-local-eval-function))) | |
2820 | (cond ((eq prop t) | |
2821 | (let ((ok t)) | |
2822 | (dolist (arg (cdr exp)) | |
2823 | (unless (hack-one-local-variable-constantp arg) | |
2824 | (setq ok nil))) | |
2825 | ok)) | |
2826 | ((functionp prop) | |
2827 | (funcall prop exp)) | |
2828 | ((listp prop) | |
2829 | (let ((ok nil)) | |
2830 | (dolist (function prop) | |
2831 | (if (funcall function exp) | |
2832 | (setq ok t))) | |
2833 | ok))))))) | |
ff7affeb | 2834 | |
f3e23606 | 2835 | (defun hack-one-local-variable (var val) |
0c7c413c CY |
2836 | "Set local variable VAR with value VAL. |
2837 | If VAR is `mode', call `VAL-mode' as a function unless it's | |
2838 | already the major mode." | |
f3e23606 | 2839 | (cond ((eq var 'mode) |
0c7c413c CY |
2840 | (let ((mode (intern (concat (downcase (symbol-name val)) |
2841 | "-mode")))) | |
2842 | (unless (eq (indirect-function mode) | |
2843 | (indirect-function major-mode)) | |
2844 | (funcall mode)))) | |
5a6c1d87 CY |
2845 | ((eq var 'eval) |
2846 | (save-excursion (eval val))) | |
e442c62b SM |
2847 | (t |
2848 | ;; Make sure the string has no text properties. | |
2849 | ;; Some text properties can get evaluated in various ways, | |
2850 | ;; so it is risky to put them on with a local variable list. | |
2851 | (if (stringp val) | |
2852 | (set-text-properties 0 (length val) nil val)) | |
2853 | (set (make-local-variable var) val)))) | |
f3e23606 | 2854 | |
b4da00e9 | 2855 | \f |
21540597 | 2856 | (defcustom change-major-mode-with-file-name t |
ba83982b | 2857 | "Non-nil means \\[write-file] should set the major mode from the file name. |
9de9b6a2 RS |
2858 | However, the mode will not be changed if |
2859 | \(1) a local variables list or the `-*-' line specifies a major mode, or | |
2860 | \(2) the current major mode is a \"special\" mode, | |
96e777e1 | 2861 | \ not suitable for ordinary files, or |
21540597 RS |
2862 | \(3) the new file name does not particularly specify any mode." |
2863 | :type 'boolean | |
2864 | :group 'editing-basics) | |
9de9b6a2 | 2865 | |
f36012a6 | 2866 | (defun set-visited-file-name (filename &optional no-query along-with-file) |
b4da00e9 | 2867 | "Change name of file visited in current buffer to FILENAME. |
1af57101 | 2868 | This also renames the buffer to correspond to the new file. |
b4da00e9 | 2869 | The next time the buffer is saved it will go in the newly specified file. |
1af57101 | 2870 | FILENAME nil or an empty string means mark buffer as not visiting any file. |
b4da00e9 | 2871 | Remember to delete the initial contents of the minibuffer |
6a6b62f8 RS |
2872 | if you wish to pass an empty string as the argument. |
2873 | ||
2874 | The optional second argument NO-QUERY, if non-nil, inhibits asking for | |
f36012a6 RS |
2875 | confirmation in the case where another buffer is already visiting FILENAME. |
2876 | ||
2877 | The optional third argument ALONG-WITH-FILE, if non-nil, means that | |
2878 | the old visited file has been renamed to the new name FILENAME." | |
b4da00e9 | 2879 | (interactive "FSet visited file name: ") |
c11a94fe RS |
2880 | (if (buffer-base-buffer) |
2881 | (error "An indirect buffer cannot visit a file")) | |
a522e5bf RS |
2882 | (let (truename) |
2883 | (if filename | |
2884 | (setq filename | |
2885 | (if (string-equal filename "") | |
2886 | nil | |
2887 | (expand-file-name filename)))) | |
2888 | (if filename | |
2889 | (progn | |
2890 | (setq truename (file-truename filename)) | |
2891 | (if find-file-visit-truename | |
a522e5bf | 2892 | (setq filename truename)))) |
cbca0a4b | 2893 | (if filename |
e6d0b67a | 2894 | (let ((new-name (file-name-nondirectory filename))) |
cbca0a4b RS |
2895 | (if (string= new-name "") |
2896 | (error "Empty file name")))) | |
11e314fa | 2897 | (let ((buffer (and filename (find-buffer-visiting filename)))) |
7b89d38e | 2898 | (and buffer (not (eq buffer (current-buffer))) |
6a6b62f8 | 2899 | (not no-query) |
674b7bae JB |
2900 | (not (y-or-n-p (format "A buffer is visiting %s; proceed? " |
2901 | filename))) | |
7b89d38e | 2902 | (error "Aborted"))) |
a522e5bf RS |
2903 | (or (equal filename buffer-file-name) |
2904 | (progn | |
2905 | (and filename (lock-buffer filename)) | |
2906 | (unlock-buffer))) | |
2907 | (setq buffer-file-name filename) | |
2908 | (if filename ; make buffer name reflect filename. | |
2909 | (let ((new-name (file-name-nondirectory buffer-file-name))) | |
a522e5bf RS |
2910 | (if (eq system-type 'vax-vms) |
2911 | (setq new-name (downcase new-name))) | |
2912 | (setq default-directory (file-name-directory buffer-file-name)) | |
67b6fd1c SM |
2913 | ;; If new-name == old-name, renaming would add a spurious <2> |
2914 | ;; and it's considered as a feature in rename-buffer. | |
a522e5bf RS |
2915 | (or (string= new-name (buffer-name)) |
2916 | (rename-buffer new-name t)))) | |
2917 | (setq buffer-backed-up nil) | |
f36012a6 RS |
2918 | (or along-with-file |
2919 | (clear-visited-file-modtime)) | |
8ccdc29e | 2920 | ;; Abbreviate the file names of the buffer. |
4826e97f | 2921 | (if truename |
8ccdc29e RS |
2922 | (progn |
2923 | (setq buffer-file-truename (abbreviate-file-name truename)) | |
2924 | (if find-file-visit-truename | |
b1f1ceb8 | 2925 | (setq buffer-file-name truename)))) |
a522e5bf RS |
2926 | (setq buffer-file-number |
2927 | (if filename | |
2a47b4f5 | 2928 | (nthcdr 10 (file-attributes buffer-file-name)) |
a522e5bf | 2929 | nil))) |
0370fe77 | 2930 | ;; write-file-functions is normally used for things like ftp-find-file |
b4da00e9 RM |
2931 | ;; that visit things that are not local files as if they were files. |
2932 | ;; Changing to visit an ordinary local file instead should flush the hook. | |
0370fe77 | 2933 | (kill-local-variable 'write-file-functions) |
c9dca4e0 | 2934 | (kill-local-variable 'local-write-file-hooks) |
b4da00e9 RM |
2935 | (kill-local-variable 'revert-buffer-function) |
2936 | (kill-local-variable 'backup-inhibited) | |
ee81c959 RS |
2937 | ;; If buffer was read-only because of version control, |
2938 | ;; that reason is gone now, so make it writable. | |
2939 | (if vc-mode | |
2940 | (setq buffer-read-only nil)) | |
2941 | (kill-local-variable 'vc-mode) | |
b4da00e9 RM |
2942 | ;; Turn off backup files for certain file names. |
2943 | ;; Since this is a permanent local, the major mode won't eliminate it. | |
4d49551a | 2944 | (and buffer-file-name |
b98a8e06 | 2945 | backup-enable-predicate |
4d49551a | 2946 | (not (funcall backup-enable-predicate buffer-file-name)) |
b4da00e9 RM |
2947 | (progn |
2948 | (make-local-variable 'backup-inhibited) | |
2949 | (setq backup-inhibited t))) | |
c77a81cf RS |
2950 | (let ((oauto buffer-auto-save-file-name)) |
2951 | ;; If auto-save was not already on, turn it on if appropriate. | |
2952 | (if (not buffer-auto-save-file-name) | |
2953 | (and buffer-file-name auto-save-default | |
2954 | (auto-save-mode t)) | |
2955 | ;; If auto save is on, start using a new name. | |
2956 | ;; We deliberately don't rename or delete the old auto save | |
2957 | ;; for the old visited file name. This is because perhaps | |
2958 | ;; the user wants to save the new state and then compare with the | |
2959 | ;; previous state from the auto save file. | |
2960 | (setq buffer-auto-save-file-name | |
2961 | (make-auto-save-file-name))) | |
2962 | ;; Rename the old auto save file if any. | |
2963 | (and oauto buffer-auto-save-file-name | |
e6f0e76c | 2964 | (file-exists-p oauto) |
c77a81cf | 2965 | (rename-file oauto buffer-auto-save-file-name t))) |
f36012a6 RS |
2966 | (and buffer-file-name |
2967 | (not along-with-file) | |
9de9b6a2 RS |
2968 | (set-buffer-modified-p t)) |
2969 | ;; Update the major mode, if the file name determines it. | |
2970 | (condition-case nil | |
2971 | ;; Don't change the mode if it is special. | |
2972 | (or (not change-major-mode-with-file-name) | |
2973 | (get major-mode 'mode-class) | |
2974 | ;; Don't change the mode if the local variable list specifies it. | |
2975 | (hack-local-variables t) | |
2976 | (set-auto-mode t)) | |
2977 | (error nil))) | |
b4da00e9 | 2978 | |
912192d1 | 2979 | (defun write-file (filename &optional confirm) |
b4da00e9 | 2980 | "Write current buffer into file FILENAME. |
7f99999a | 2981 | This makes the buffer visit that file, and marks it as not modified. |
7458cc35 | 2982 | |
7f99999a KH |
2983 | If you specify just a directory name as FILENAME, that means to use |
2984 | the default file name but in that directory. You can also yank | |
074eb6ac | 2985 | the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element]. |
7f99999a KH |
2986 | |
2987 | If the buffer is not already visiting a file, the default file name | |
2988 | for the output file is the buffer name. | |
2989 | ||
2990 | If optional second arg CONFIRM is non-nil, this function | |
2991 | asks for confirmation before overwriting an existing file. | |
912192d1 | 2992 | Interactively, confirmation is required unless you supply a prefix argument." |
b4da00e9 RM |
2993 | ;; (interactive "FWrite file: ") |
2994 | (interactive | |
2995 | (list (if buffer-file-name | |
2996 | (read-file-name "Write file: " | |
f3684505 | 2997 | nil nil nil nil) |
7f99999a KH |
2998 | (read-file-name "Write file: " default-directory |
2999 | (expand-file-name | |
3000 | (file-name-nondirectory (buffer-name)) | |
3001 | default-directory) | |
3002 | nil nil)) | |
912192d1 | 3003 | (not current-prefix-arg))) |
b4da00e9 | 3004 | (or (null filename) (string-equal filename "") |
41f48cb1 RS |
3005 | (progn |
3006 | ;; If arg is just a directory, | |
7f99999a KH |
3007 | ;; use the default file name, but in that directory. |
3008 | (if (file-directory-p filename) | |
41f48cb1 | 3009 | (setq filename (concat (file-name-as-directory filename) |
7f99999a KH |
3010 | (file-name-nondirectory |
3011 | (or buffer-file-name (buffer-name)))))) | |
c2fb8488 RS |
3012 | (and confirm |
3013 | (file-exists-p filename) | |
3014 | (or (y-or-n-p (format "File `%s' exists; overwrite? " filename)) | |
3015 | (error "Canceled"))) | |
5f65549e | 3016 | (set-visited-file-name filename (not confirm)))) |
b4da00e9 | 3017 | (set-buffer-modified-p t) |
6492b55d KH |
3018 | ;; Make buffer writable if file is writable. |
3019 | (and buffer-file-name | |
3020 | (file-writable-p buffer-file-name) | |
3021 | (setq buffer-read-only nil)) | |
8e5c7b90 SM |
3022 | (save-buffer) |
3023 | ;; It's likely that the VC status at the new location is different from | |
3024 | ;; the one at the old location. | |
3025 | (vc-find-file-hook)) | |
b4da00e9 RM |
3026 | \f |
3027 | (defun backup-buffer () | |
3028 | "Make a backup of the disk file visited by the current buffer, if appropriate. | |
3029 | This is normally done before saving the buffer the first time. | |
27ab6944 KH |
3030 | |
3031 | A backup may be done by renaming or by copying; see documentation of | |
3032 | variable `make-backup-files'. If it's done by renaming, then the file is | |
f3f9e207 RS |
3033 | no longer accessible under its old name. |
3034 | ||
3035 | The value is non-nil after a backup was made by renaming. | |
3036 | It has the form (MODES . BACKUPNAME). | |
3037 | MODES is the result of `file-modes' on the original | |
3038 | file; this means that the caller, after saving the buffer, should change | |
3039 | the modes of the new file to agree with the old modes. | |
3040 | BACKUPNAME is the backup file name, which is the old file renamed." | |
b4da00e9 RM |
3041 | (if (and make-backup-files (not backup-inhibited) |
3042 | (not buffer-backed-up) | |
3043 | (file-exists-p buffer-file-name) | |
3044 | (memq (aref (elt (file-attributes buffer-file-name) 8) 0) | |
3045 | '(?- ?l))) | |
3046 | (let ((real-file-name buffer-file-name) | |
3047 | backup-info backupname targets setmodes) | |
3048 | ;; If specified name is a symbolic link, chase it to the target. | |
3049 | ;; Thus we make the backups in the directory where the real file is. | |
5dadeb29 | 3050 | (setq real-file-name (file-chase-links real-file-name)) |
b4da00e9 RM |
3051 | (setq backup-info (find-backup-file-name real-file-name) |
3052 | backupname (car backup-info) | |
3053 | targets (cdr backup-info)) | |
5c6d31a4 SM |
3054 | ;; (if (file-directory-p buffer-file-name) |
3055 | ;; (error "Cannot save buffer in directory %s" buffer-file-name)) | |
eb650569 RS |
3056 | (if backup-info |
3057 | (condition-case () | |
3058 | (let ((delete-old-versions | |
3059 | ;; If have old versions to maybe delete, | |
3060 | ;; ask the user to confirm now, before doing anything. | |
3061 | ;; But don't actually delete til later. | |
3062 | (and targets | |
3063 | (or (eq delete-old-versions t) (eq delete-old-versions nil)) | |
3064 | (or delete-old-versions | |
3065 | (y-or-n-p (format "Delete excess backup versions of %s? " | |
446c63b0 RS |
3066 | real-file-name))))) |
3067 | (modes (file-modes buffer-file-name))) | |
eb650569 RS |
3068 | ;; Actually write the back up file. |
3069 | (condition-case () | |
3070 | (if (or file-precious-flag | |
ffc0e1ca | 3071 | ; (file-symlink-p buffer-file-name) |
eb650569 | 3072 | backup-by-copying |
446c63b0 | 3073 | ;; Don't rename a suid or sgid file. |
7da6bf00 | 3074 | (and modes (< 0 (logand modes #o6000))) |
79d2d279 | 3075 | (not (file-writable-p (file-name-directory real-file-name))) |
eb650569 RS |
3076 | (and backup-by-copying-when-linked |
3077 | (> (file-nlinks real-file-name) 1)) | |
ffc0e1ca AS |
3078 | (and (or backup-by-copying-when-mismatch |
3079 | (integerp backup-by-copying-when-privileged-mismatch)) | |
eb650569 | 3080 | (let ((attr (file-attributes real-file-name))) |
ffc0e1ca AS |
3081 | (and (or backup-by-copying-when-mismatch |
3082 | (and (integerp (nth 2 attr)) | |
3083 | (integerp backup-by-copying-when-privileged-mismatch) | |
3084 | (<= (nth 2 attr) backup-by-copying-when-privileged-mismatch))) | |
3085 | (or (nth 9 attr) | |
3086 | (not (file-ownership-preserved-p real-file-name))))))) | |
446c63b0 | 3087 | (backup-buffer-copy real-file-name backupname modes) |
eb650569 RS |
3088 | ;; rename-file should delete old backup. |
3089 | (rename-file real-file-name backupname t) | |
446c63b0 | 3090 | (setq setmodes (cons modes backupname))) |
eb650569 RS |
3091 | (file-error |
3092 | ;; If trouble writing the backup, write it in ~. | |
567c1ca9 RS |
3093 | (setq backupname (expand-file-name |
3094 | (convert-standard-filename | |
3095 | "~/%backup%~"))) | |
3096 | (message "Cannot write backup file; backing up in %s" | |
6ba7756e | 3097 | backupname) |
eb650569 | 3098 | (sleep-for 1) |
446c63b0 | 3099 | (backup-buffer-copy real-file-name backupname modes))) |
eb650569 RS |
3100 | (setq buffer-backed-up t) |
3101 | ;; Now delete the old versions, if desired. | |
3102 | (if delete-old-versions | |
3103 | (while targets | |
3104 | (condition-case () | |
3105 | (delete-file (car targets)) | |
3106 | (file-error nil)) | |
3107 | (setq targets (cdr targets)))) | |
3108 | setmodes) | |
3109 | (file-error nil)))))) | |
b4da00e9 | 3110 | |
446c63b0 | 3111 | (defun backup-buffer-copy (from-name to-name modes) |
44dce0fb RS |
3112 | (let ((umask (default-file-modes))) |
3113 | (unwind-protect | |
3114 | (progn | |
3115 | ;; Create temp files with strict access rights. It's easy to | |
3116 | ;; loosen them later, whereas it's impossible to close the | |
3117 | ;; time-window of loose permissions otherwise. | |
3118 | (set-default-file-modes ?\700) | |
3119 | (while (condition-case () | |
3120 | (progn | |
3121 | (condition-case nil | |
3122 | (delete-file to-name) | |
3123 | (file-error nil)) | |
920e95c0 | 3124 | (copy-file from-name to-name nil t) |
44dce0fb RS |
3125 | nil) |
3126 | (file-already-exists t)) | |
689accb8 RS |
3127 | ;; The file was somehow created by someone else between |
3128 | ;; `delete-file' and `copy-file', so let's try again. | |
3129 | nil)) | |
44dce0fb RS |
3130 | ;; Reset the umask. |
3131 | (set-default-file-modes umask))) | |
147fbf70 RS |
3132 | (and modes |
3133 | (set-file-modes to-name (logand modes #o1777)))) | |
446c63b0 | 3134 | |
c3554e95 | 3135 | (defun file-name-sans-versions (name &optional keep-backup-version) |
ffc0e1ca | 3136 | "Return file NAME sans backup versions or strings. |
b4da00e9 | 3137 | This is a separate procedure so your site-init or startup file can |
c3554e95 RS |
3138 | redefine it. |
3139 | If the optional argument KEEP-BACKUP-VERSION is non-nil, | |
3140 | we do not remove backup version numbers, only true file version numbers." | |
6eaebaa2 | 3141 | (let ((handler (find-file-name-handler name 'file-name-sans-versions))) |
c3554e95 RS |
3142 | (if handler |
3143 | (funcall handler 'file-name-sans-versions name keep-backup-version) | |
3144 | (substring name 0 | |
3145 | (if (eq system-type 'vax-vms) | |
3146 | ;; VMS version number is (a) semicolon, optional | |
3147 | ;; sign, zero or more digits or (b) period, option | |
3148 | ;; sign, zero or more digits, provided this is the | |
3149 | ;; second period encountered outside of the | |
3150 | ;; device/directory part of the file name. | |
26add1bf KH |
3151 | (or (string-match ";[-+]?[0-9]*\\'" name) |
3152 | (if (string-match "\\.[^]>:]*\\(\\.[-+]?[0-9]*\\)\\'" | |
c3554e95 RS |
3153 | name) |
3154 | (match-beginning 1)) | |
3155 | (length name)) | |
3156 | (if keep-backup-version | |
3157 | (length name) | |
dbb12f2c | 3158 | (or (string-match "\\.~[0-9.]+~\\'" name) |
c3554e95 RS |
3159 | (string-match "~\\'" name) |
3160 | (length name)))))))) | |
b4da00e9 | 3161 | |
cb0cd911 | 3162 | (defun file-ownership-preserved-p (file) |
ffc0e1ca | 3163 | "Return t if deleting FILE and rewriting it would preserve the owner." |
cb0cd911 RS |
3164 | (let ((handler (find-file-name-handler file 'file-ownership-preserved-p))) |
3165 | (if handler | |
3166 | (funcall handler 'file-ownership-preserved-p file) | |
ec5533be | 3167 | (let ((attributes (file-attributes file))) |
306faa42 RS |
3168 | ;; Return t if the file doesn't exist, since it's true that no |
3169 | ;; information would be lost by an (attempted) delete and create. | |
3170 | (or (null attributes) | |
3171 | (= (nth 2 attributes) (user-uid))))))) | |
cb0cd911 | 3172 | |
20b5d24c RS |
3173 | (defun file-name-sans-extension (filename) |
3174 | "Return FILENAME sans final \"extension\". | |
2531b0c3 EZ |
3175 | The extension, in a file name, is the part that follows the last `.', |
3176 | except that a leading `.', if any, doesn't count." | |
20b5d24c RS |
3177 | (save-match-data |
3178 | (let ((file (file-name-sans-versions (file-name-nondirectory filename))) | |
3179 | directory) | |
2531b0c3 EZ |
3180 | (if (and (string-match "\\.[^.]*\\'" file) |
3181 | (not (eq 0 (match-beginning 0)))) | |
20b5d24c | 3182 | (if (setq directory (file-name-directory filename)) |
6ee24f1e RS |
3183 | ;; Don't use expand-file-name here; if DIRECTORY is relative, |
3184 | ;; we don't want to expand it. | |
3185 | (concat directory (substring file 0 (match-beginning 0))) | |
20b5d24c RS |
3186 | (substring file 0 (match-beginning 0))) |
3187 | filename)))) | |
3188 | ||
93a2702d RS |
3189 | (defun file-name-extension (filename &optional period) |
3190 | "Return FILENAME's final \"extension\". | |
2531b0c3 | 3191 | The extension, in a file name, is the part that follows the last `.', |
32483280 | 3192 | excluding version numbers and backup suffixes, |
2531b0c3 | 3193 | except that a leading `.', if any, doesn't count. |
93a2702d RS |
3194 | Return nil for extensionless file names such as `foo'. |
3195 | Return the empty string for file names such as `foo.'. | |
3196 | ||
3197 | If PERIOD is non-nil, then the returned value includes the period | |
3198 | that delimits the extension, and if FILENAME has no extension, | |
3199 | the value is \"\"." | |
3200 | (save-match-data | |
3201 | (let ((file (file-name-sans-versions (file-name-nondirectory filename)))) | |
2531b0c3 EZ |
3202 | (if (and (string-match "\\.[^.]*\\'" file) |
3203 | (not (eq 0 (match-beginning 0)))) | |
93a2702d RS |
3204 | (substring file (+ (match-beginning 0) (if period 0 1))) |
3205 | (if period | |
3206 | ""))))) | |
3207 | ||
ffc0e1ca AS |
3208 | (defcustom make-backup-file-name-function nil |
3209 | "A function to use instead of the default `make-backup-file-name'. | |
643c985d | 3210 | A value of nil gives the default `make-backup-file-name' behavior. |
ffc0e1ca | 3211 | |
d5798fa7 | 3212 | This could be buffer-local to do something special for specific |
ffc0e1ca AS |
3213 | files. If you define it, you may need to change `backup-file-name-p' |
3214 | and `file-name-sans-versions' too. | |
3215 | ||
3216 | See also `backup-directory-alist'." | |
3217 | :group 'backup | |
3218 | :type '(choice (const :tag "Default" nil) | |
3219 | (function :tag "Your function"))) | |
3220 | ||
3221 | (defcustom backup-directory-alist nil | |
3222 | "Alist of filename patterns and backup directory names. | |
3223 | Each element looks like (REGEXP . DIRECTORY). Backups of files with | |
3224 | names matching REGEXP will be made in DIRECTORY. DIRECTORY may be | |
3225 | relative or absolute. If it is absolute, so that all matching files | |
3226 | are backed up into the same directory, the file names in this | |
3227 | directory will be the full name of the file backed up with all | |
3228 | directory separators changed to `!' to prevent clashes. This will not | |
3229 | work correctly if your filesystem truncates the resulting name. | |
3230 | ||
3231 | For the common case of all backups going into one directory, the alist | |
3232 | should contain a single element pairing \".\" with the appropriate | |
3233 | directory name. | |
3234 | ||
3235 | If this variable is nil, or it fails to match a filename, the backup | |
3236 | is made in the original file's directory. | |
3237 | ||
3238 | On MS-DOS filesystems without long names this variable is always | |
3239 | ignored." | |
3240 | :group 'backup | |
dca5e71d | 3241 | :type '(repeat (cons (regexp :tag "Regexp matching filename") |
ffc0e1ca AS |
3242 | (directory :tag "Backup directory name")))) |
3243 | ||
388d6ab5 RS |
3244 | (defun normal-backup-enable-predicate (name) |
3245 | "Default `backup-enable-predicate' function. | |
0c2f6dda RS |
3246 | Checks for files in `temporary-file-directory', |
3247 | `small-temporary-file-directory', and /tmp." | |
388d6ab5 RS |
3248 | (not (or (let ((comp (compare-strings temporary-file-directory 0 nil |
3249 | name 0 nil))) | |
3250 | ;; Directory is under temporary-file-directory. | |
3251 | (and (not (eq comp t)) | |
3252 | (< comp (- (length temporary-file-directory))))) | |
0c2f6dda RS |
3253 | (let ((comp (compare-strings "/tmp" 0 nil |
3254 | name 0 nil))) | |
3255 | ;; Directory is under /tmp. | |
3256 | (and (not (eq comp t)) | |
3257 | (< comp (- (length "/tmp"))))) | |
388d6ab5 RS |
3258 | (if small-temporary-file-directory |
3259 | (let ((comp (compare-strings small-temporary-file-directory | |
3260 | 0 nil | |
3261 | name 0 nil))) | |
3262 | ;; Directory is under small-temporary-file-directory. | |
3263 | (and (not (eq comp t)) | |
3264 | (< comp (- (length small-temporary-file-directory))))))))) | |
3265 | ||
b4da00e9 RM |
3266 | (defun make-backup-file-name (file) |
3267 | "Create the non-numeric backup file name for FILE. | |
ffc0e1ca AS |
3268 | Normally this will just be the file's name with `~' appended. |
3269 | Customization hooks are provided as follows. | |
3270 | ||
3271 | If the variable `make-backup-file-name-function' is non-nil, its value | |
3272 | should be a function which will be called with FILE as its argument; | |
3273 | the resulting name is used. | |
3274 | ||
3275 | Otherwise a match for FILE is sought in `backup-directory-alist'; see | |
3276 | the documentation of that variable. If the directory for the backup | |
3277 | doesn't exist, it is created." | |
3278 | (if make-backup-file-name-function | |
3279 | (funcall make-backup-file-name-function file) | |
3280 | (if (and (eq system-type 'ms-dos) | |
3281 | (not (msdos-long-file-names))) | |
3282 | (let ((fn (file-name-nondirectory file))) | |
3283 | (concat (file-name-directory file) | |
3284 | (or (and (string-match "\\`[^.]+\\'" fn) | |
3285 | (concat (match-string 0 fn) ".~")) | |
3286 | (and (string-match "\\`[^.]+\\.\\(..?\\)?" fn) | |
3287 | (concat (match-string 0 fn) "~"))))) | |
3288 | (concat (make-backup-file-name-1 file) "~")))) | |
3289 | ||
3290 | (defun make-backup-file-name-1 (file) | |
3291 | "Subroutine of `make-backup-file-name' and `find-backup-file-name'." | |
3292 | (let ((alist backup-directory-alist) | |
6ba7756e | 3293 | elt backup-directory abs-backup-directory) |
ffc0e1ca AS |
3294 | (while alist |
3295 | (setq elt (pop alist)) | |
3296 | (if (string-match (car elt) file) | |
3297 | (setq backup-directory (cdr elt) | |
3298 | alist nil))) | |
eb0455ab RS |
3299 | ;; If backup-directory is relative, it should be relative to the |
3300 | ;; file's directory. By expanding explicitly here, we avoid | |
3301 | ;; depending on default-directory. | |
3302 | (if backup-directory | |
6ba7756e RS |
3303 | (setq abs-backup-directory |
3304 | (expand-file-name backup-directory | |
3305 | (file-name-directory file)))) | |
3306 | (if (and abs-backup-directory (not (file-exists-p abs-backup-directory))) | |
ffc0e1ca | 3307 | (condition-case nil |
6ba7756e RS |
3308 | (make-directory abs-backup-directory 'parents) |
3309 | (file-error (setq backup-directory nil | |
3310 | abs-backup-directory nil)))) | |
ee291b46 RS |
3311 | (if (null backup-directory) |
3312 | file | |
ffc0e1ca AS |
3313 | (if (file-name-absolute-p backup-directory) |
3314 | (progn | |
c60ee5e7 | 3315 | (when (memq system-type '(windows-nt ms-dos cygwin)) |
d7b6ca4a RS |
3316 | ;; Normalize DOSish file names: downcase the drive |
3317 | ;; letter, if any, and replace the leading "x:" with | |
3318 | ;; "/drive_x". | |
ffc0e1ca AS |
3319 | (or (file-name-absolute-p file) |
3320 | (setq file (expand-file-name file))) ; make defaults explicit | |
3321 | ;; Replace any invalid file-name characters (for the | |
3322 | ;; case of backing up remote files). | |
446c097e | 3323 | (setq file (expand-file-name (convert-standard-filename file))) |
ffc0e1ca | 3324 | (if (eq (aref file 1) ?:) |
d7b6ca4a | 3325 | (setq file (concat "/" |
ffc0e1ca AS |
3326 | "drive_" |
3327 | (char-to-string (downcase (aref file 0))) | |
d7b6ca4a | 3328 | (if (eq (aref file 2) ?/) |
ffc0e1ca | 3329 | "" |
d7b6ca4a | 3330 | "/") |
ffc0e1ca AS |
3331 | (substring file 2))))) |
3332 | ;; Make the name unique by substituting directory | |
3333 | ;; separators. It may not really be worth bothering about | |
3334 | ;; doubling `!'s in the original name... | |
3335 | (expand-file-name | |
3336 | (subst-char-in-string | |
d7b6ca4a | 3337 | ?/ ?! |
ffc0e1ca AS |
3338 | (replace-regexp-in-string "!" "!!" file)) |
3339 | backup-directory)) | |
3340 | (expand-file-name (file-name-nondirectory file) | |
6ba7756e | 3341 | (file-name-as-directory abs-backup-directory)))))) |
b4da00e9 RM |
3342 | |
3343 | (defun backup-file-name-p (file) | |
3344 | "Return non-nil if FILE is a backup file name (numeric or not). | |
3345 | This is a separate function so you can redefine it for customization. | |
3346 | You may need to redefine `file-name-sans-versions' as well." | |
066327ae | 3347 | (string-match "~\\'" file)) |
b4da00e9 | 3348 | |
e2b30772 RS |
3349 | (defvar backup-extract-version-start) |
3350 | ||
2d051399 | 3351 | ;; This is used in various files. |
a7aa942a KH |
3352 | ;; The usage of backup-extract-version-start is not very clean, |
3353 | ;; but I can't see a good alternative, so as of now I am leaving it alone. | |
2d051399 | 3354 | (defun backup-extract-version (fn) |
ffc0e1ca | 3355 | "Given the name of a numeric backup file, FN, return the backup number. |
e2b30772 | 3356 | Uses the free variable `backup-extract-version-start', whose value should be |
2d051399 | 3357 | the index in the name where the version number begins." |
e2b30772 RS |
3358 | (if (and (string-match "[0-9]+~$" fn backup-extract-version-start) |
3359 | (= (match-beginning 0) backup-extract-version-start)) | |
027a4b6b | 3360 | (string-to-number (substring fn backup-extract-version-start -1)) |
2d051399 RS |
3361 | 0)) |
3362 | ||
b4da00e9 RM |
3363 | ;; I believe there is no need to alter this behavior for VMS; |
3364 | ;; since backup files are not made on VMS, it should not get called. | |
3365 | (defun find-backup-file-name (fn) | |
ffc0e1ca | 3366 | "Find a file name for a backup file FN, and suggestions for deletions. |
b4da00e9 | 3367 | Value is a list whose car is the name for the backup file |
ffc0e1ca AS |
3368 | and whose cdr is a list of old versions to consider deleting now. |
3369 | If the value is nil, don't make a backup. | |
3370 | Uses `backup-directory-alist' in the same way as does | |
3371 | `make-backup-file-name'." | |
eb650569 RS |
3372 | (let ((handler (find-file-name-handler fn 'find-backup-file-name))) |
3373 | ;; Run a handler for this function so that ange-ftp can refuse to do it. | |
3374 | (if handler | |
3375 | (funcall handler 'find-backup-file-name fn) | |
f26d858e EZ |
3376 | (if (or (eq version-control 'never) |
3377 | ;; We don't support numbered backups on plain MS-DOS | |
3378 | ;; when long file names are unavailable. | |
3379 | (and (eq system-type 'ms-dos) | |
3380 | (not (msdos-long-file-names)))) | |
b4da00e9 | 3381 | (list (make-backup-file-name fn)) |
ffc0e1ca AS |
3382 | (let* ((basic-name (make-backup-file-name-1 fn)) |
3383 | (base-versions (concat (file-name-nondirectory basic-name) | |
3384 | ".~")) | |
e2b30772 | 3385 | (backup-extract-version-start (length base-versions)) |
eb650569 | 3386 | (high-water-mark 0) |
ffc0e1ca AS |
3387 | (number-to-delete 0) |
3388 | possibilities deserve-versions-p versions) | |
eb650569 RS |
3389 | (condition-case () |
3390 | (setq possibilities (file-name-all-completions | |
3391 | base-versions | |
ffc0e1ca AS |
3392 | (file-name-directory basic-name)) |
3393 | versions (sort (mapcar #'backup-extract-version | |
3394 | possibilities) | |
3395 | #'<) | |
eb650569 RS |
3396 | high-water-mark (apply 'max 0 versions) |
3397 | deserve-versions-p (or version-control | |
3398 | (> high-water-mark 0)) | |
3399 | number-to-delete (- (length versions) | |
ffc0e1ca AS |
3400 | kept-old-versions |
3401 | kept-new-versions | |
3402 | -1)) | |
3403 | (file-error (setq possibilities nil))) | |
eb650569 | 3404 | (if (not deserve-versions-p) |
8767d866 | 3405 | (list (make-backup-file-name fn)) |
ffc0e1ca | 3406 | (cons (format "%s.~%d~" basic-name (1+ high-water-mark)) |
eb650569 RS |
3407 | (if (and (> number-to-delete 0) |
3408 | ;; Delete nothing if there is overflow | |
3409 | ;; in the number of versions to keep. | |
3410 | (>= (+ kept-new-versions kept-old-versions -1) 0)) | |
ffc0e1ca AS |
3411 | (mapcar (lambda (n) |
3412 | (format "%s.~%d~" basic-name n)) | |
eb650569 RS |
3413 | (let ((v (nthcdr kept-old-versions versions))) |
3414 | (rplacd (nthcdr (1- number-to-delete) v) ()) | |
3415 | v)))))))))) | |
b4da00e9 | 3416 | |
b4da00e9 RM |
3417 | (defun file-nlinks (filename) |
3418 | "Return number of names file FILENAME has." | |
3419 | (car (cdr (file-attributes filename)))) | |
6c636af9 | 3420 | |
753ad988 KG |
3421 | ;; (defun file-relative-name (filename &optional directory) |
3422 | ;; "Convert FILENAME to be relative to DIRECTORY (default: `default-directory'). | |
3423 | ;; This function returns a relative file name which is equivalent to FILENAME | |
3424 | ;; when used with that default directory as the default. | |
3425 | ;; If this is impossible (which can happen on MSDOS and Windows | |
3426 | ;; when the file name and directory use different drive names) | |
3427 | ;; then it returns FILENAME." | |
3428 | ;; (save-match-data | |
3429 | ;; (let ((fname (expand-file-name filename))) | |
3430 | ;; (setq directory (file-name-as-directory | |
3431 | ;; (expand-file-name (or directory default-directory)))) | |
3432 | ;; ;; On Microsoft OSes, if FILENAME and DIRECTORY have different | |
3433 | ;; ;; drive names, they can't be relative, so return the absolute name. | |
3434 | ;; (if (and (or (eq system-type 'ms-dos) | |
3435 | ;; (eq system-type 'cygwin) | |
3436 | ;; (eq system-type 'windows-nt)) | |
3437 | ;; (not (string-equal (substring fname 0 2) | |
3438 | ;; (substring directory 0 2)))) | |
3439 | ;; filename | |
3440 | ;; (let ((ancestor ".") | |
3441 | ;; (fname-dir (file-name-as-directory fname))) | |
3442 | ;; (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir)) | |
3443 | ;; (not (string-match (concat "^" (regexp-quote directory)) fname))) | |
3444 | ;; (setq directory (file-name-directory (substring directory 0 -1)) | |
3445 | ;; ancestor (if (equal ancestor ".") | |
3446 | ;; ".." | |
3447 | ;; (concat "../" ancestor)))) | |
3448 | ;; ;; Now ancestor is empty, or .., or ../.., etc. | |
3449 | ;; (if (string-match (concat "^" (regexp-quote directory)) fname) | |
3450 | ;; ;; We matched within FNAME's directory part. | |
3451 | ;; ;; Add the rest of FNAME onto ANCESTOR. | |
3452 | ;; (let ((rest (substring fname (match-end 0)))) | |
3453 | ;; (if (and (equal ancestor ".") | |
3454 | ;; (not (equal rest ""))) | |
3455 | ;; ;; But don't bother with ANCESTOR if it would give us `./'. | |
3456 | ;; rest | |
3457 | ;; (concat (file-name-as-directory ancestor) rest))) | |
3458 | ;; ;; We matched FNAME's directory equivalent. | |
3459 | ;; ancestor)))))) | |
3460 | ||
6c636af9 | 3461 | (defun file-relative-name (filename &optional directory) |
ffc0e1ca | 3462 | "Convert FILENAME to be relative to DIRECTORY (default: `default-directory'). |
2d6562a5 RS |
3463 | This function returns a relative file name which is equivalent to FILENAME |
3464 | when used with that default directory as the default. | |
753ad988 | 3465 | If FILENAME and DIRECTORY lie on different machines or on different drives |
1be0210d | 3466 | on a DOS/Windows machine, it returns FILENAME in expanded form." |
96c188b0 | 3467 | (save-match-data |
753ad988 KG |
3468 | (setq directory |
3469 | (file-name-as-directory (expand-file-name (or directory | |
3470 | default-directory)))) | |
3471 | (setq filename (expand-file-name filename)) | |
3f788773 KG |
3472 | (let ((fremote (file-remote-p filename)) |
3473 | (dremote (file-remote-p directory))) | |
493c98af KG |
3474 | (if ;; Conditions for separate trees |
3475 | (or | |
3476 | ;; Test for different drives on DOS/Windows | |
3477 | (and | |
7c64272b | 3478 | ;; Should `cygwin' really be included here? --stef |
493c98af | 3479 | (memq system-type '(ms-dos cygwin windows-nt)) |
7c64272b | 3480 | (not (eq t (compare-strings filename 0 2 directory 0 2)))) |
493c98af | 3481 | ;; Test for different remote file system identification |
3f788773 | 3482 | (not (equal fremote dremote))) |
e2b30772 | 3483 | filename |
753ad988 KG |
3484 | (let ((ancestor ".") |
3485 | (filename-dir (file-name-as-directory filename))) | |
7c64272b SM |
3486 | (while (not |
3487 | (or | |
3488 | (eq t (compare-strings filename-dir nil (length directory) | |
3489 | directory nil nil case-fold-search)) | |
3490 | (eq t (compare-strings filename nil (length directory) | |
3491 | directory nil nil case-fold-search)))) | |
753ad988 | 3492 | (setq directory (file-name-directory (substring directory 0 -1)) |
9695aac6 RS |
3493 | ancestor (if (equal ancestor ".") |
3494 | ".." | |
3495 | (concat "../" ancestor)))) | |
753ad988 | 3496 | ;; Now ancestor is empty, or .., or ../.., etc. |
7c64272b SM |
3497 | (if (eq t (compare-strings filename nil (length directory) |
3498 | directory nil nil case-fold-search)) | |
753ad988 KG |
3499 | ;; We matched within FILENAME's directory part. |
3500 | ;; Add the rest of FILENAME onto ANCESTOR. | |
3f7d6528 | 3501 | (let ((rest (substring filename (length directory)))) |
753ad988 | 3502 | (if (and (equal ancestor ".") (not (equal rest ""))) |
9695aac6 RS |
3503 | ;; But don't bother with ANCESTOR if it would give us `./'. |
3504 | rest | |
3505 | (concat (file-name-as-directory ancestor) rest))) | |
753ad988 KG |
3506 | ;; We matched FILENAME's directory equivalent. |
3507 | ancestor)))))) | |
b4da00e9 RM |
3508 | \f |
3509 | (defun save-buffer (&optional args) | |
e8f4db18 RS |
3510 | "Save current buffer in visited file if modified. |
3511 | Variations are described below. | |
3512 | ||
b4da00e9 RM |
3513 | By default, makes the previous version into a backup file |
3514 | if previously requested or if this is the first save. | |
dc2ab26e | 3515 | Prefixed with one \\[universal-argument], marks this version |
b4da00e9 | 3516 | to become a backup when the next save is done. |
dc2ab26e | 3517 | Prefixed with two \\[universal-argument]'s, |
b4da00e9 | 3518 | unconditionally makes the previous version into a backup file. |
dc2ab26e | 3519 | Prefixed with three \\[universal-argument]'s, marks this version |
ac9650be RS |
3520 | to become a backup when the next save is done, |
3521 | and unconditionally makes the previous version into a backup file. | |
3522 | ||
dc2ab26e EZ |
3523 | With a numeric argument of 0, never make the previous version |
3524 | into a backup file. | |
b4da00e9 RM |
3525 | |
3526 | If a file's name is FOO, the names of its numbered backup versions are | |
3527 | FOO.~i~ for various integers i. A non-numbered backup file is called FOO~. | |
3528 | Numeric backups (rather than FOO~) will be made if value of | |
3529 | `version-control' is not the atom `never' and either there are already | |
3530 | numeric versions of the file being backed up, or `version-control' is | |
3531 | non-nil. | |
3532 | We don't want excessive versions piling up, so there are variables | |
3533 | `kept-old-versions', which tells Emacs how many oldest versions to keep, | |
3534 | and `kept-new-versions', which tells how many newest versions to keep. | |
3535 | Defaults are 2 old versions and 2 new. | |
3536 | `dired-kept-versions' controls dired's clean-directory (.) command. | |
de7d5e1b | 3537 | If `delete-old-versions' is nil, system will query user |
e73ec04b RS |
3538 | before trimming versions. Otherwise it does it silently. |
3539 | ||
749d2ee6 RS |
3540 | If `vc-make-backup-files' is nil, which is the default, |
3541 | no backup files are made for files managed by version control. | |
3542 | (This is because the version control system itself records previous versions.) | |
3543 | ||
e73ec04b | 3544 | See the subroutine `basic-save-buffer' for more information." |
b4da00e9 RM |
3545 | (interactive "p") |
3546 | (let ((modp (buffer-modified-p)) | |
3547 | (large (> (buffer-size) 50000)) | |
b5a8e0fc RS |
3548 | (make-backup-files (or (and make-backup-files (not (eq args 0))) |
3549 | (memq args '(16 64))))) | |
b4da00e9 | 3550 | (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) |
b4990dde GM |
3551 | (if (and modp large (buffer-file-name)) |
3552 | (message "Saving file %s..." (buffer-file-name))) | |
b4da00e9 RM |
3553 | (basic-save-buffer) |
3554 | (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) | |
3555 | ||
3556 | (defun delete-auto-save-file-if-necessary (&optional force) | |
3557 | "Delete auto-save file for current buffer if `delete-auto-save-files' is t. | |
3558 | Normally delete only if the file was written by this Emacs since | |
3559 | the last real save, but optional arg FORCE non-nil means delete anyway." | |
3560 | (and buffer-auto-save-file-name delete-auto-save-files | |
3561 | (not (string= buffer-file-name buffer-auto-save-file-name)) | |
3562 | (or force (recent-auto-save-p)) | |
3563 | (progn | |
3564 | (condition-case () | |
3565 | (delete-file buffer-auto-save-file-name) | |
3566 | (file-error nil)) | |
3567 | (set-buffer-auto-saved)))) | |
3568 | ||
481f215b KH |
3569 | (defvar auto-save-hook nil |
3570 | "Normal hook run just before auto-saving.") | |
3571 | ||
3c3b81d1 SJ |
3572 | (defcustom before-save-hook nil |
3573 | "Normal hook that is run before a buffer is saved to its file." | |
25f6295e | 3574 | :options '(copyright-update time-stamp) |
3c3b81d1 SJ |
3575 | :type 'hook |
3576 | :group 'files) | |
3577 | ||
ffc0e1ca AS |
3578 | (defcustom after-save-hook nil |
3579 | "Normal hook that is run after a buffer is saved to its file." | |
3580 | :options '(executable-make-buffer-file-executable-if-script-p) | |
3581 | :type 'hook | |
3582 | :group 'files) | |
1cc852cc | 3583 | |
0516edee RS |
3584 | (defvar save-buffer-coding-system nil |
3585 | "If non-nil, use this coding system for saving the buffer. | |
3586 | More precisely, use this coding system in place of the | |
3587 | value of `buffer-file-coding-system', when saving the buffer. | |
3588 | Calling `write-region' for any purpose other than saving the buffer | |
3589 | will still use `buffer-file-coding-system'; this variable has no effect | |
3590 | in such cases.") | |
3591 | ||
d5fe94cc RS |
3592 | (make-variable-buffer-local 'save-buffer-coding-system) |
3593 | (put 'save-buffer-coding-system 'permanent-local t) | |
3594 | ||
b4da00e9 | 3595 | (defun basic-save-buffer () |
1cc852cc | 3596 | "Save the current buffer in its visited file, if it has been modified. |
0370fe77 SM |
3597 | The hooks `write-contents-functions' and `write-file-functions' get a chance |
3598 | to do the job of saving; if they do not, then the buffer is saved in | |
222cf381 | 3599 | the visited file in the usual way. |
3c3b81d1 SJ |
3600 | Before and after saving the buffer, this function runs |
3601 | `before-save-hook' and `after-save-hook', respectively." | |
b4da00e9 | 3602 | (interactive) |
19618231 | 3603 | (save-current-buffer |
c11a94fe RS |
3604 | ;; In an indirect buffer, save its base buffer instead. |
3605 | (if (buffer-base-buffer) | |
3606 | (set-buffer (buffer-base-buffer))) | |
3607 | (if (buffer-modified-p) | |
3608 | (let ((recent-save (recent-auto-save-p)) | |
818286f4 | 3609 | setmodes) |
c11a94fe RS |
3610 | ;; On VMS, rename file and buffer to get rid of version number. |
3611 | (if (and (eq system-type 'vax-vms) | |
3612 | (not (string= buffer-file-name | |
3613 | (file-name-sans-versions buffer-file-name)))) | |
3614 | (let (buffer-new-name) | |
3615 | ;; Strip VMS version number before save. | |
3616 | (setq buffer-file-name | |
3617 | (file-name-sans-versions buffer-file-name)) | |
3618 | ;; Construct a (unique) buffer name to correspond. | |
3619 | (let ((buf (create-file-buffer (downcase buffer-file-name)))) | |
3620 | (setq buffer-new-name (buffer-name buf)) | |
3621 | (kill-buffer buf)) | |
3622 | (rename-buffer buffer-new-name))) | |
3623 | ;; If buffer has no file name, ask user for one. | |
3624 | (or buffer-file-name | |
182891ef RS |
3625 | (let ((filename |
3626 | (expand-file-name | |
3627 | (read-file-name "File to save in: ") nil))) | |
8400146f MR |
3628 | (if (file-exists-p filename) |
3629 | (if (file-directory-p filename) | |
3630 | ;; Signal an error if the user specified the name of an | |
3631 | ;; existing directory. | |
3632 | (error "%s is a directory" filename) | |
3633 | (unless (y-or-n-p (format "File `%s' exists; overwrite? " | |
3634 | filename)) | |
3635 | (error "Canceled"))) | |
3636 | ;; Signal an error if the specified name refers to a | |
3637 | ;; non-existing directory. | |
3638 | (let ((dir (file-name-directory filename))) | |
3639 | (unless (file-directory-p dir) | |
3640 | (if (file-exists-p dir) | |
3641 | (error "%s is not a directory" dir) | |
3642 | (error "%s: no such directory" dir))))) | |
182891ef | 3643 | (set-visited-file-name filename))) |
c11a94fe RS |
3644 | (or (verify-visited-file-modtime (current-buffer)) |
3645 | (not (file-exists-p buffer-file-name)) | |
3646 | (yes-or-no-p | |
3647 | (format "%s has changed since visited or saved. Save anyway? " | |
3648 | (file-name-nondirectory buffer-file-name))) | |
3649 | (error "Save not confirmed")) | |
3650 | (save-restriction | |
3651 | (widen) | |
19618231 | 3652 | (save-excursion |
0370fe77 | 3653 | (and (> (point-max) (point-min)) |
407b4328 | 3654 | (not find-file-literally) |
19618231 RS |
3655 | (/= (char-after (1- (point-max))) ?\n) |
3656 | (not (and (eq selective-display t) | |
3657 | (= (char-after (1- (point-max))) ?\r))) | |
3658 | (or (eq require-final-newline t) | |
f4206092 | 3659 | (eq require-final-newline 'visit-save) |
19618231 RS |
3660 | (and require-final-newline |
3661 | (y-or-n-p | |
3662 | (format "Buffer %s does not end in newline. Add one? " | |
3663 | (buffer-name))))) | |
3664 | (save-excursion | |
3665 | (goto-char (point-max)) | |
3666 | (insert ?\n)))) | |
fa5867f6 AS |
3667 | ;; Support VC version backups. |
3668 | (vc-before-save) | |
3c3b81d1 | 3669 | (run-hooks 'before-save-hook) |
0370fe77 | 3670 | (or (run-hook-with-args-until-success 'write-contents-functions) |
c11a94fe | 3671 | (run-hook-with-args-until-success 'local-write-file-hooks) |
0370fe77 | 3672 | (run-hook-with-args-until-success 'write-file-functions) |
0ba5894b RS |
3673 | ;; If a hook returned t, file is already "written". |
3674 | ;; Otherwise, write it the usual way now. | |
3675 | (setq setmodes (basic-save-buffer-1))) | |
d6e8ea6f KH |
3676 | ;; Now we have saved the current buffer. Let's make sure |
3677 | ;; that buffer-file-coding-system is fixed to what | |
3678 | ;; actually used for saving by binding it locally. | |
0516edee RS |
3679 | (if save-buffer-coding-system |
3680 | (setq save-buffer-coding-system last-coding-system-used) | |
3681 | (setq buffer-file-coding-system last-coding-system-used)) | |
2a47b4f5 RS |
3682 | (setq buffer-file-number |
3683 | (nthcdr 10 (file-attributes buffer-file-name))) | |
c11a94fe RS |
3684 | (if setmodes |
3685 | (condition-case () | |
f3f9e207 | 3686 | (set-file-modes buffer-file-name (car setmodes)) |
c11a94fe RS |
3687 | (error nil)))) |
3688 | ;; If the auto-save file was recent before this command, | |
3689 | ;; delete it now. | |
3690 | (delete-auto-save-file-if-necessary recent-save) | |
49530862 RS |
3691 | ;; Support VC `implicit' locking. |
3692 | (vc-after-save) | |
c11a94fe RS |
3693 | (run-hooks 'after-save-hook)) |
3694 | (message "(No changes need to be saved)")))) | |
b4da00e9 | 3695 | |
87d26afc RS |
3696 | ;; This does the "real job" of writing a buffer into its visited file |
3697 | ;; and making a backup file. This is what is normally done | |
0370fe77 | 3698 | ;; but inhibited if one of write-file-functions returns non-nil. |
f3f9e207 | 3699 | ;; It returns a value (MODES . BACKUPNAME), like backup-buffer. |
87d26afc | 3700 | (defun basic-save-buffer-1 () |
969be033 RS |
3701 | (prog1 |
3702 | (if save-buffer-coding-system | |
3703 | (let ((coding-system-for-write save-buffer-coding-system)) | |
3704 | (basic-save-buffer-2)) | |
d5fe94cc | 3705 | (basic-save-buffer-2)) |
969be033 | 3706 | (setq buffer-file-coding-system-explicit last-coding-system-used))) |
d5fe94cc | 3707 | |
f3f9e207 | 3708 | ;; This returns a value (MODES . BACKUPNAME), like backup-buffer. |
d5fe94cc RS |
3709 | (defun basic-save-buffer-2 () |
3710 | (let (tempsetmodes setmodes) | |
87d26afc RS |
3711 | (if (not (file-writable-p buffer-file-name)) |
3712 | (let ((dir (file-name-directory buffer-file-name))) | |
3713 | (if (not (file-directory-p dir)) | |
83c6f446 RS |
3714 | (if (file-exists-p dir) |
3715 | (error "%s is not a directory" dir) | |
87c60260 | 3716 | (error "%s: no such directory" dir)) |
87d26afc RS |
3717 | (if (not (file-exists-p buffer-file-name)) |
3718 | (error "Directory %s write-protected" dir) | |
3719 | (if (yes-or-no-p | |
3720 | (format "File %s is write-protected; try to save anyway? " | |
3721 | (file-name-nondirectory | |
3722 | buffer-file-name))) | |
3723 | (setq tempsetmodes t) | |
3724 | (error "Attempt to save to a file which you aren't allowed to write")))))) | |
3725 | (or buffer-backed-up | |
3726 | (setq setmodes (backup-buffer))) | |
76d5492b | 3727 | (let ((dir (file-name-directory buffer-file-name))) |
f4a0f59b RS |
3728 | (if (and file-precious-flag |
3729 | (file-writable-p dir)) | |
3730 | ;; If file is precious, write temp name, then rename it. | |
3731 | ;; This requires write access to the containing dir, | |
3732 | ;; which is why we don't try it if we don't have that access. | |
3733 | (let ((realname buffer-file-name) | |
44dce0fb RS |
3734 | tempname succeed |
3735 | (umask (default-file-modes)) | |
6782610c | 3736 | (old-modtime (visited-file-modtime))) |
44dce0fb RS |
3737 | ;; Create temp files with strict access rights. It's easy to |
3738 | ;; loosen them later, whereas it's impossible to close the | |
3739 | ;; time-window of loose permissions otherwise. | |
f4a0f59b | 3740 | (unwind-protect |
44dce0fb RS |
3741 | (progn |
3742 | (clear-visited-file-modtime) | |
3743 | (set-default-file-modes ?\700) | |
3744 | ;; Try various temporary names. | |
3745 | ;; This code follows the example of make-temp-file, | |
3746 | ;; but it calls write-region in the appropriate way | |
3747 | ;; for saving the buffer. | |
3748 | (while (condition-case () | |
3749 | (progn | |
3750 | (setq tempname | |
3751 | (make-temp-name | |
3752 | (expand-file-name "tmp" dir))) | |
3753 | (write-region (point-min) (point-max) | |
3754 | tempname nil realname | |
3755 | buffer-file-truename 'excl) | |
3756 | nil) | |
3757 | (file-already-exists t)) | |
3758 | ;; The file was somehow created by someone else between | |
3759 | ;; `make-temp-name' and `write-region', let's try again. | |
3760 | nil) | |
3761 | (setq succeed t)) | |
3762 | ;; Reset the umask. | |
3763 | (set-default-file-modes umask) | |
3764 | ;; If we failed, restore the buffer's modtime. | |
3765 | (unless succeed | |
3766 | (set-visited-file-modtime old-modtime))) | |
3767 | ;; Since we have created an entirely new file, | |
3768 | ;; make sure it gets the right permission bits set. | |
730df8db | 3769 | (setq setmodes (or setmodes |
562ca538 RS |
3770 | (cons (or (file-modes buffer-file-name) |
3771 | (logand ?\666 umask)) | |
730df8db | 3772 | buffer-file-name))) |
f4a0f59b RS |
3773 | ;; We succeeded in writing the temp file, |
3774 | ;; so rename it. | |
3775 | (rename-file tempname buffer-file-name t)) | |
3776 | ;; If file not writable, see if we can make it writable | |
3777 | ;; temporarily while we write it. | |
3778 | ;; But no need to do so if we have just backed it up | |
3779 | ;; (setmodes is set) because that says we're superseding. | |
3780 | (cond ((and tempsetmodes (not setmodes)) | |
3781 | ;; Change the mode back, after writing. | |
f3f9e207 RS |
3782 | (setq setmodes (cons (file-modes buffer-file-name) buffer-file-name)) |
3783 | (set-file-modes buffer-file-name (logior (car setmodes) 128)))) | |
3784 | (let (success) | |
3785 | (unwind-protect | |
3786 | (progn | |
3787 | (write-region (point-min) (point-max) | |
3788 | buffer-file-name nil t buffer-file-truename) | |
3789 | (setq success t)) | |
3790 | ;; If we get an error writing the new file, and we made | |
3791 | ;; the backup by renaming, undo the backing-up. | |
3792 | (and setmodes (not success) | |
0133dab9 EZ |
3793 | (progn |
3794 | (rename-file (cdr setmodes) buffer-file-name t) | |
3795 | (setq buffer-backed-up nil))))))) | |
87d26afc RS |
3796 | setmodes)) |
3797 | ||
1eeae2a1 RS |
3798 | (defun diff-buffer-with-file (&optional buffer) |
3799 | "View the differences between BUFFER and its associated file. | |
0b9e4749 | 3800 | This requires the external program `diff' to be in your `exec-path'." |
1eeae2a1 | 3801 | (interactive "bBuffer: ") |
0b9e4749 | 3802 | (with-current-buffer (get-buffer (or buffer (current-buffer))) |
4e4e9519 MR |
3803 | (if (and buffer-file-name |
3804 | (file-exists-p buffer-file-name)) | |
3805 | (let ((tempfile (make-temp-file "buffer-content-"))) | |
3806 | (unwind-protect | |
3807 | (save-restriction | |
3808 | (widen) | |
3809 | (write-region (point-min) (point-max) tempfile nil 'nomessage) | |
3810 | (diff buffer-file-name tempfile nil t) | |
3811 | (sit-for 0)) | |
3812 | (when (file-exists-p tempfile) | |
3813 | (delete-file tempfile)))) | |
3814 | (message "Buffer %s has no associated file on disc" (buffer-name)) | |
3815 | ;; Display that message for 1 second so that user can read it | |
3816 | ;; in the minibuffer. | |
3817 | (sit-for 1))) | |
3818 | ;; return always nil, so that save-buffers-kill-emacs will not move | |
3819 | ;; over to the next unsaved buffer when calling `d'. | |
3820 | nil) | |
1eeae2a1 RS |
3821 | |
3822 | (defvar save-some-buffers-action-alist | |
3823 | '((?\C-r | |
3824 | (lambda (buf) | |
3825 | (view-buffer buf | |
3826 | (lambda (ignore) | |
3827 | (exit-recursive-edit))) | |
3828 | (recursive-edit) | |
3829 | ;; Return nil to ask about BUF again. | |
3830 | nil) | |
5c471b12 | 3831 | "view this buffer") |
16abdbe6 CY |
3832 | (?d (lambda (buf) |
3833 | (save-window-excursion | |
3834 | (diff-buffer-with-file buf)) | |
3835 | (view-buffer (get-buffer-create "*Diff*") | |
3836 | (lambda (ignore) (exit-recursive-edit))) | |
3837 | (recursive-edit) | |
3838 | nil) | |
5c471b12 | 3839 | "view changes in this buffer")) |
1eeae2a1 | 3840 | "ACTION-ALIST argument used in call to `map-y-or-n-p'.") |
1eeae2a1 | 3841 | |
a1b0c2a7 RS |
3842 | (defvar buffer-save-without-query nil |
3843 | "Non-nil means `save-some-buffers' should save this buffer without asking.") | |
3844 | (make-variable-buffer-local 'buffer-save-without-query) | |
3845 | ||
ffc0e1ca | 3846 | (defun save-some-buffers (&optional arg pred) |
b4da00e9 | 3847 | "Save some modified file-visiting buffers. Asks user about each one. |
1eeae2a1 RS |
3848 | You can answer `y' to save, `n' not to save, `C-r' to look at the |
3849 | buffer in question with `view-buffer' before deciding or `d' to | |
126c9dda | 3850 | view the differences using `diff-buffer-with-file'. |
8fd9c174 | 3851 | |
5bbbceb1 | 3852 | Optional argument (the prefix) non-nil means save all with no questions. |
ffc0e1ca AS |
3853 | Optional second argument PRED determines which buffers are considered: |
3854 | If PRED is nil, all the file-visiting buffers are considered. | |
3855 | If PRED is t, then certain non-file buffers will also be considered. | |
3856 | If PRED is a zero-argument function, it indicates for each buffer whether | |
1eeae2a1 RS |
3857 | to consider it or not when called with that buffer current. |
3858 | ||
3859 | See `save-some-buffers-action-alist' if you want to | |
3860 | change the additional actions you can take on files." | |
b4da00e9 | 3861 | (interactive "P") |
907482b9 | 3862 | (save-window-excursion |
a1b0c2a7 RS |
3863 | (let* (queried some-automatic |
3864 | files-done abbrevs-done) | |
3865 | (dolist (buffer (buffer-list)) | |
3866 | ;; First save any buffers that we're supposed to save unconditionally. | |
3867 | ;; That way the following code won't ask about them. | |
3868 | (with-current-buffer buffer | |
3869 | (when (and buffer-save-without-query (buffer-modified-p)) | |
3870 | (setq some-automatic t) | |
3871 | (save-buffer)))) | |
3872 | ;; Ask about those buffers that merit it, | |
3873 | ;; and record the number thus saved. | |
3874 | (setq files-done | |
76d5492b RM |
3875 | (map-y-or-n-p |
3876 | (function | |
3877 | (lambda (buffer) | |
3878 | (and (buffer-modified-p buffer) | |
3879 | (not (buffer-base-buffer buffer)) | |
3880 | (or | |
3881 | (buffer-file-name buffer) | |
ffc0e1ca | 3882 | (and pred |
76d5492b RM |
3883 | (progn |
3884 | (set-buffer buffer) | |
3885 | (and buffer-offer-save (> (buffer-size) 0))))) | |
ffc0e1ca AS |
3886 | (or (not (functionp pred)) |
3887 | (with-current-buffer buffer (funcall pred))) | |
76d5492b RM |
3888 | (if arg |
3889 | t | |
3890 | (setq queried t) | |
3891 | (if (buffer-file-name buffer) | |
3892 | (format "Save file %s? " | |
3893 | (buffer-file-name buffer)) | |
3894 | (format "Save buffer %s? " | |
3895 | (buffer-name buffer))))))) | |
3896 | (function | |
3897 | (lambda (buffer) | |
3898 | (set-buffer buffer) | |
3899 | (save-buffer))) | |
3900 | (buffer-list) | |
3901 | '("buffer" "buffers" "save") | |
1eeae2a1 | 3902 | save-some-buffers-action-alist)) |
bf247b6e | 3903 | ;; Maybe to save abbrevs, and record whether |
a1b0c2a7 RS |
3904 | ;; we either saved them or asked to. |
3905 | (and save-abbrevs abbrevs-changed | |
3906 | (progn | |
3907 | (if (or arg | |
3908 | (eq save-abbrevs 'silently) | |
3909 | (y-or-n-p (format "Save abbrevs in %s? " | |
3910 | abbrev-file-name))) | |
3911 | (write-abbrev-file nil)) | |
3912 | ;; Don't keep bothering user if he says no. | |
3913 | (setq abbrevs-changed nil) | |
3914 | (setq abbrevs-done t))) | |
76d5492b | 3915 | (or queried (> files-done 0) abbrevs-done |
a1b0c2a7 RS |
3916 | (message (if some-automatic |
3917 | "(Some special files were saved without asking)" | |
3918 | "(No files need saving)")))))) | |
b4da00e9 RM |
3919 | \f |
3920 | (defun not-modified (&optional arg) | |
3921 | "Mark current buffer as unmodified, not needing to be saved. | |
a641f9a1 RM |
3922 | With prefix arg, mark buffer as modified, so \\[save-buffer] will save. |
3923 | ||
3924 | It is not a good idea to use this function in Lisp programs, because it | |
3925 | prints a message in the minibuffer. Instead, use `set-buffer-modified-p'." | |
b4da00e9 RM |
3926 | (interactive "P") |
3927 | (message (if arg "Modification-flag set" | |
3928 | "Modification-flag cleared")) | |
3929 | (set-buffer-modified-p arg)) | |
3930 | ||
3931 | (defun toggle-read-only (&optional arg) | |
3932 | "Change whether this buffer is visiting its file read-only. | |
2a9fe1e2 RS |
3933 | With arg, set read-only iff arg is positive. |
3934 | If visiting file read-only and `view-read-only' is non-nil, enter view mode." | |
b4da00e9 | 3935 | (interactive "P") |
c60ee5e7 | 3936 | (if (and arg |
d758359d AS |
3937 | (if (> (prefix-numeric-value arg) 0) buffer-read-only |
3938 | (not buffer-read-only))) ; If buffer-read-only is set correctly, | |
3939 | nil ; do nothing. | |
3940 | ;; Toggle. | |
3941 | (cond | |
3942 | ((and buffer-read-only view-mode) | |
3943 | (View-exit-and-edit) | |
3944 | (make-local-variable 'view-read-only) | |
3945 | (setq view-read-only t)) ; Must leave view mode. | |
3946 | ((and (not buffer-read-only) view-read-only | |
818286f4 SM |
3947 | ;; If view-mode is already active, `view-mode-enter' is a nop. |
3948 | (not view-mode) | |
d758359d AS |
3949 | (not (eq (get major-mode 'mode-class) 'special))) |
3950 | (view-mode-enter)) | |
3951 | (t (setq buffer-read-only (not buffer-read-only)) | |
3952 | (force-mode-line-update))) | |
3953 | (if (vc-backend buffer-file-name) | |
8a26c165 | 3954 | (message "%s" (substitute-command-keys |
a5dd5f60 RS |
3955 | (concat "File is under version-control; " |
3956 | "use \\[vc-next-action] to check in/out")))))) | |
b4da00e9 | 3957 | |
912192d1 | 3958 | (defun insert-file (filename) |
b4da00e9 RM |
3959 | "Insert contents of file FILENAME into buffer after point. |
3960 | Set mark after the inserted text. | |
3961 | ||
3962 | This function is meant for the user to run interactively. | |
3963 | Don't call it from programs! Use `insert-file-contents' instead. | |
3964 | \(Its calling sequence is different; see its documentation)." | |
912192d1 | 3965 | (interactive "*fInsert file: ") |
3a64a3cf | 3966 | (insert-file-1 filename #'insert-file-contents)) |
b4da00e9 | 3967 | |
912192d1 | 3968 | (defun append-to-file (start end filename) |
b4da00e9 RM |
3969 | "Append the contents of the region to the end of file FILENAME. |
3970 | When called from a function, expects three arguments, | |
3971 | START, END and FILENAME. START and END are buffer positions | |
da30bf98 | 3972 | saying what text to write." |
912192d1 KH |
3973 | (interactive "r\nFAppend to file: ") |
3974 | (write-region start end filename t)) | |
b4da00e9 RM |
3975 | |
3976 | (defun file-newest-backup (filename) | |
3977 | "Return most recent backup file for FILENAME or nil if no backups exist." | |
ffc0e1ca AS |
3978 | ;; `make-backup-file-name' will get us the right directory for |
3979 | ;; ordinary or numeric backups. It might create a directory for | |
3980 | ;; backups as a side-effect, according to `backup-directory-alist'. | |
e31cfca5 | 3981 | (let* ((filename (file-name-sans-versions |
783bf210 | 3982 | (make-backup-file-name (expand-file-name filename)))) |
b4da00e9 RM |
3983 | (file (file-name-nondirectory filename)) |
3984 | (dir (file-name-directory filename)) | |
3985 | (comp (file-name-all-completions file dir)) | |
cf7e94a0 RS |
3986 | (newest nil) |
3987 | tem) | |
b4da00e9 | 3988 | (while comp |
ffc0e1ca | 3989 | (setq tem (pop comp)) |
cf7e94a0 RS |
3990 | (cond ((and (backup-file-name-p tem) |
3991 | (string= (file-name-sans-versions tem) file)) | |
3992 | (setq tem (concat dir tem)) | |
3993 | (if (or (null newest) | |
3994 | (file-newer-than-file-p tem newest)) | |
3995 | (setq newest tem))))) | |
b4da00e9 RM |
3996 | newest)) |
3997 | ||
3998 | (defun rename-uniquely () | |
3999 | "Rename current buffer to a similar name not already taken. | |
4000 | This function is useful for creating multiple shell process buffers | |
4001 | or multiple mail buffers, etc." | |
4002 | (interactive) | |
40eb8038 | 4003 | (save-match-data |
e0df3aef KH |
4004 | (let ((base-name (buffer-name))) |
4005 | (and (string-match "<[0-9]+>\\'" base-name) | |
4006 | (not (and buffer-file-name | |
4007 | (string= base-name | |
4008 | (file-name-nondirectory buffer-file-name)))) | |
4009 | ;; If the existing buffer name has a <NNN>, | |
4010 | ;; which isn't part of the file name (if any), | |
4011 | ;; then get rid of that. | |
4012 | (setq base-name (substring base-name 0 (match-beginning 0)))) | |
4013 | (rename-buffer (generate-new-buffer-name base-name)) | |
3941fe2c | 4014 | (force-mode-line-update)))) |
5bbbceb1 | 4015 | |
4e43240a | 4016 | (defun make-directory (dir &optional parents) |
5ce8bb89 RS |
4017 | "Create the directory DIR and any nonexistent parent dirs. |
4018 | Interactively, the default choice of directory to create | |
4019 | is the current default directory for file names. | |
0225ae5e | 4020 | That is useful when you have visited a file in a nonexistent directory. |
5ce8bb89 RS |
4021 | |
4022 | Noninteractively, the second (optional) argument PARENTS says whether | |
07703430 RS |
4023 | to create parent directories if they don't exist. Interactively, |
4024 | this happens by default." | |
5ce8bb89 RS |
4025 | (interactive |
4026 | (list (read-file-name "Make directory: " default-directory default-directory | |
4027 | nil nil) | |
4028 | t)) | |
ee291b46 RS |
4029 | ;; If default-directory is a remote directory, |
4030 | ;; make sure we find its make-directory handler. | |
4031 | (setq dir (expand-file-name dir)) | |
6eaebaa2 | 4032 | (let ((handler (find-file-name-handler dir 'make-directory))) |
4e43240a RS |
4033 | (if handler |
4034 | (funcall handler 'make-directory dir parents) | |
4035 | (if (not parents) | |
4036 | (make-directory-internal dir) | |
4037 | (let ((dir (directory-file-name (expand-file-name dir))) | |
4038 | create-list) | |
4039 | (while (not (file-exists-p dir)) | |
76d5492b | 4040 | (setq create-list (cons dir create-list) |
4e43240a RS |
4041 | dir (directory-file-name (file-name-directory dir)))) |
4042 | (while create-list | |
4043 | (make-directory-internal (car create-list)) | |
4044 | (setq create-list (cdr create-list)))))))) | |
b4da00e9 RM |
4045 | \f |
4046 | (put 'revert-buffer-function 'permanent-local t) | |
4047 | (defvar revert-buffer-function nil | |
0973d78b RS |
4048 | "Function to use to revert this buffer, or nil to do the default. |
4049 | The function receives two arguments IGNORE-AUTO and NOCONFIRM, | |
4050 | which are the arguments that `revert-buffer' received.") | |
b4da00e9 RM |
4051 | |
4052 | (put 'revert-buffer-insert-file-contents-function 'permanent-local t) | |
4053 | (defvar revert-buffer-insert-file-contents-function nil | |
4054 | "Function to use to insert contents when reverting this buffer. | |
4055 | Gets two args, first the nominal file name to use, | |
2df32500 RS |
4056 | and second, t if reading the auto-save file. |
4057 | ||
4058 | The function you specify is responsible for updating (or preserving) point.") | |
b4da00e9 | 4059 | |
b0dc9757 LT |
4060 | (defvar buffer-stale-function nil |
4061 | "Function to check whether a non-file buffer needs reverting. | |
4062 | This should be a function with one optional argument NOCONFIRM. | |
44dce0fb | 4063 | Auto Revert Mode passes t for NOCONFIRM. The function should return |
8b0b6932 LT |
4064 | non-nil if the buffer should be reverted. A return value of |
4065 | `fast' means that the need for reverting was not checked, but | |
4066 | that reverting the buffer is fast. The buffer is current when | |
4067 | this function is called. | |
b0dc9757 | 4068 | |
4f8453ae LT |
4069 | The idea behind the NOCONFIRM argument is that it should be |
4070 | non-nil if the buffer is going to be reverted without asking the | |
4071 | user. In such situations, one has to be careful with potentially | |
c90dcdd5 LT |
4072 | time consuming operations. |
4073 | ||
4074 | For more information on how this variable is used by Auto Revert mode, | |
b3a59350 | 4075 | see Info node `(emacs)Supporting additional buffers'.") |
b0dc9757 | 4076 | |
5f76e7d4 KH |
4077 | (defvar before-revert-hook nil |
4078 | "Normal hook for `revert-buffer' to run before reverting. | |
4079 | If `revert-buffer-function' is used to override the normal revert | |
4080 | mechanism, this hook is not used.") | |
4081 | ||
4082 | (defvar after-revert-hook nil | |
4083 | "Normal hook for `revert-buffer' to run after reverting. | |
4084 | Note that the hook value that it runs is the value that was in effect | |
4085 | before reverting; that makes a difference if you have buffer-local | |
4086 | hook functions. | |
4087 | ||
4088 | If `revert-buffer-function' is used to override the normal revert | |
4089 | mechanism, this hook is not used.") | |
4090 | ||
1554c03b RS |
4091 | (defvar revert-buffer-internal-hook) |
4092 | ||
9a30563f | 4093 | (defun revert-buffer (&optional ignore-auto noconfirm preserve-modes) |
7e7c9c4e | 4094 | "Replace current buffer text with the text of the visited file on disk. |
b4da00e9 | 4095 | This undoes all changes since the file was visited or saved. |
8c0e7b73 JB |
4096 | With a prefix argument, offer to revert from latest auto-save file, if |
4097 | that is more recent than the visited file. | |
1ab31687 | 4098 | |
7e7c9c4e RS |
4099 | This command also works for special buffers that contain text which |
4100 | doesn't come from a file, but reflects some other data base instead: | |
4e163715 | 4101 | for example, Dired buffers and `buffer-list' buffers. In these cases, |
7e7c9c4e RS |
4102 | it reconstructs the buffer contents from the appropriate data base. |
4103 | ||
65ee6096 | 4104 | When called from Lisp, the first argument is IGNORE-AUTO; only offer |
1ab31687 JB |
4105 | to revert from the auto-save file when this is nil. Note that the |
4106 | sense of this argument is the reverse of the prefix argument, for the | |
4107 | sake of backward compatibility. IGNORE-AUTO is optional, defaulting | |
4108 | to nil. | |
4109 | ||
4110 | Optional second argument NOCONFIRM means don't ask for confirmation at | |
518dc5be EZ |
4111 | all. \(The variable `revert-without-query' offers another way to |
4112 | revert buffers without querying for confirmation.) | |
b4da00e9 | 4113 | |
5b2b26d5 RS |
4114 | Optional third argument PRESERVE-MODES non-nil means don't alter |
4115 | the files modes. Normally we reinitialize them using `normal-mode'. | |
4116 | ||
8c0e7b73 | 4117 | If the value of `revert-buffer-function' is non-nil, it is called to |
7e7c9c4e RS |
4118 | do all the work for this command. Otherwise, the hooks |
4119 | `before-revert-hook' and `after-revert-hook' are run at the beginning | |
4120 | and the end, and if `revert-buffer-insert-file-contents-function' is | |
4121 | non-nil, it is called instead of rereading visited file contents." | |
fb6208a6 | 4122 | |
1ab31687 JB |
4123 | ;; I admit it's odd to reverse the sense of the prefix argument, but |
4124 | ;; there is a lot of code out there which assumes that the first | |
4125 | ;; argument should be t to avoid consulting the auto-save file, and | |
4126 | ;; there's no straightforward way to encourage authors to notice a | |
4127 | ;; reversal of the argument sense. So I'm just changing the user | |
4128 | ;; interface, but leaving the programmatic interface the same. | |
e0867e99 | 4129 | (interactive (list (not current-prefix-arg))) |
b4da00e9 | 4130 | (if revert-buffer-function |
1ab31687 | 4131 | (funcall revert-buffer-function ignore-auto noconfirm) |
44dce0fb RS |
4132 | (with-current-buffer (or (buffer-base-buffer (current-buffer)) |
4133 | (current-buffer)) | |
4134 | (let* ((auto-save-p (and (not ignore-auto) | |
4135 | (recent-auto-save-p) | |
4136 | buffer-auto-save-file-name | |
4137 | (file-readable-p buffer-auto-save-file-name) | |
4138 | (y-or-n-p | |
4139 | "Buffer has been auto-saved recently. Revert from auto-save file? "))) | |
4140 | (file-name (if auto-save-p | |
4141 | buffer-auto-save-file-name | |
4142 | buffer-file-name))) | |
4143 | (cond ((null file-name) | |
4144 | (error "Buffer does not seem to be associated with any file")) | |
4145 | ((or noconfirm | |
4146 | (and (not (buffer-modified-p)) | |
518dc5be EZ |
4147 | (catch 'found |
4148 | (dolist (regexp revert-without-query) | |
4149 | (when (string-match regexp file-name) | |
4150 | (throw 'found t))))) | |
44dce0fb RS |
4151 | (yes-or-no-p (format "Revert buffer from file %s? " |
4152 | file-name))) | |
4153 | (run-hooks 'before-revert-hook) | |
4154 | ;; If file was backed up but has changed since, | |
4155 | ;; we shd make another backup. | |
4156 | (and (not auto-save-p) | |
4157 | (not (verify-visited-file-modtime (current-buffer))) | |
4158 | (setq buffer-backed-up nil)) | |
44dce0fb RS |
4159 | ;; Effectively copy the after-revert-hook status, |
4160 | ;; since after-find-file will clobber it. | |
4161 | (let ((global-hook (default-value 'after-revert-hook)) | |
518dc5be EZ |
4162 | (local-hook (when (local-variable-p 'after-revert-hook) |
4163 | after-revert-hook)) | |
4164 | (inhibit-read-only t)) | |
4165 | (cond | |
4166 | (revert-buffer-insert-file-contents-function | |
4167 | (unless (eq buffer-undo-list t) | |
4168 | ;; Get rid of all undo records for this buffer. | |
4169 | (setq buffer-undo-list nil)) | |
4170 | ;; Don't make undo records for the reversion. | |
4171 | (let ((buffer-undo-list t)) | |
4172 | (funcall revert-buffer-insert-file-contents-function | |
4173 | file-name auto-save-p))) | |
4174 | ((not (file-exists-p file-name)) | |
4175 | (error (if buffer-file-number | |
4176 | "File %s no longer exists!" | |
4177 | "Cannot revert nonexistent file %s") | |
4178 | file-name)) | |
b2d239c1 RS |
4179 | ((not (file-readable-p file-name)) |
4180 | (error (if buffer-file-number | |
4181 | "File %s no longer readable!" | |
4182 | "Cannot revert unreadable file %s") | |
4183 | file-name)) | |
518dc5be EZ |
4184 | (t |
4185 | ;; Bind buffer-file-name to nil | |
4186 | ;; so that we don't try to lock the file. | |
4187 | (let ((buffer-file-name nil)) | |
4188 | (or auto-save-p | |
4189 | (unlock-buffer))) | |
4190 | (widen) | |
4191 | (let ((coding-system-for-read | |
4192 | ;; Auto-saved file should be read by Emacs' | |
4193 | ;; internal coding. | |
4194 | (if auto-save-p 'auto-save-coding | |
4195 | (or coding-system-for-read | |
4196 | buffer-file-coding-system-explicit)))) | |
e1ee3b54 | 4197 | (if (and (not enable-multibyte-characters) |
52f9b751 | 4198 | coding-system-for-read |
e1ee3b54 KH |
4199 | (not (memq (coding-system-base |
4200 | coding-system-for-read) | |
4201 | '(no-conversion raw-text)))) | |
4202 | ;; As a coding system suitable for multibyte | |
4203 | ;; buffer is specified, make the current | |
4204 | ;; buffer multibyte. | |
4205 | (set-buffer-multibyte t)) | |
4206 | ||
518dc5be EZ |
4207 | ;; This force after-insert-file-set-coding |
4208 | ;; (called from insert-file-contents) to set | |
4209 | ;; buffer-file-coding-system to a proper value. | |
4210 | (kill-local-variable 'buffer-file-coding-system) | |
4211 | ||
4212 | ;; Note that this preserves point in an intelligent way. | |
4213 | (if preserve-modes | |
4214 | (let ((buffer-file-format buffer-file-format)) | |
4215 | (insert-file-contents file-name (not auto-save-p) | |
4216 | nil nil t)) | |
4217 | (insert-file-contents file-name (not auto-save-p) | |
4218 | nil nil t))))) | |
44dce0fb RS |
4219 | ;; Recompute the truename in case changes in symlinks |
4220 | ;; have changed the truename. | |
4221 | (setq buffer-file-truename | |
4222 | (abbreviate-file-name (file-truename buffer-file-name))) | |
4223 | (after-find-file nil nil t t preserve-modes) | |
4224 | ;; Run after-revert-hook as it was before we reverted. | |
4225 | (setq-default revert-buffer-internal-hook global-hook) | |
518dc5be | 4226 | (if local-hook |
44dce0fb RS |
4227 | (set (make-local-variable 'revert-buffer-internal-hook) |
4228 | local-hook) | |
4229 | (kill-local-variable 'revert-buffer-internal-hook)) | |
4230 | (run-hooks 'revert-buffer-internal-hook)) | |
4231 | t)))))) | |
b4da00e9 | 4232 | |
64d18e8f RS |
4233 | (defun recover-this-file () |
4234 | "Recover the visited file--get contents from its last auto-save file." | |
4235 | (interactive) | |
4236 | (recover-file buffer-file-name)) | |
4237 | ||
b4da00e9 RM |
4238 | (defun recover-file (file) |
4239 | "Visit file FILE, but get contents from its last auto-save file." | |
10f7c7fc RS |
4240 | ;; Actually putting the file name in the minibuffer should be used |
4241 | ;; only rarely. | |
4242 | ;; Not just because users often use the default. | |
e1dadc17 | 4243 | (interactive "FRecover file: ") |
b4da00e9 | 4244 | (setq file (expand-file-name file)) |
f7da6740 | 4245 | (if (auto-save-file-name-p (file-name-nondirectory file)) |
4e163715 | 4246 | (error "%s is an auto-save file" (abbreviate-file-name file))) |
b4da00e9 RM |
4247 | (let ((file-name (let ((buffer-file-name file)) |
4248 | (make-auto-save-file-name)))) | |
945e1965 RS |
4249 | (cond ((if (file-exists-p file) |
4250 | (not (file-newer-than-file-p file-name file)) | |
4251 | (not (file-exists-p file-name))) | |
4e163715 SM |
4252 | (error "Auto-save file %s not current" |
4253 | (abbreviate-file-name file-name))) | |
b4da00e9 | 4254 | ((save-window-excursion |
ffc0e1ca AS |
4255 | (with-output-to-temp-buffer "*Directory*" |
4256 | (buffer-disable-undo standard-output) | |
4257 | (save-excursion | |
4258 | (let ((switches dired-listing-switches)) | |
4259 | (if (file-symlink-p file) | |
4260 | (setq switches (concat switches "L"))) | |
4261 | (set-buffer standard-output) | |
bc22fd18 EZ |
4262 | ;; Use insert-directory-safely, not insert-directory, |
4263 | ;; because these files might not exist. In particular, | |
4264 | ;; FILE might not exist if the auto-save file was for | |
4265 | ;; a buffer that didn't visit a file, such as "*mail*". | |
4266 | ;; The code in v20.x called `ls' directly, so we need | |
4267 | ;; to emulate what `ls' did in that case. | |
4268 | (insert-directory-safely file switches) | |
4269 | (insert-directory-safely file-name switches)))) | |
b4da00e9 RM |
4270 | (yes-or-no-p (format "Recover auto save file %s? " file-name))) |
4271 | (switch-to-buffer (find-file-noselect file t)) | |
518dc5be | 4272 | (let ((inhibit-read-only t) |
1e87edf5 KH |
4273 | ;; Keep the current buffer-file-coding-system. |
4274 | (coding-system buffer-file-coding-system) | |
1d0ec0d1 | 4275 | ;; Auto-saved file should be read with special coding. |
77619f8e | 4276 | (coding-system-for-read 'auto-save-coding)) |
b4da00e9 | 4277 | (erase-buffer) |
1e87edf5 KH |
4278 | (insert-file-contents file-name nil) |
4279 | (set-buffer-file-coding-system coding-system)) | |
8cfb9d46 | 4280 | (after-find-file nil nil t)) |
ffa7ab70 | 4281 | (t (error "Recover-file cancelled"))))) |
b4da00e9 | 4282 | |
6598027d | 4283 | (defun recover-session () |
9aee5392 RS |
4284 | "Recover auto save files from a previous Emacs session. |
4285 | This command first displays a Dired buffer showing you the | |
4286 | previous sessions that you could recover from. | |
4287 | To choose one, move point to the proper line and then type C-c C-c. | |
4288 | Then you'll be asked about a number of files to recover." | |
4289 | (interactive) | |
363a5030 RS |
4290 | (if (null auto-save-list-file-prefix) |
4291 | (error "You set `auto-save-list-file-prefix' to disable making session files")) | |
ffc0e1ca AS |
4292 | (let ((dir (file-name-directory auto-save-list-file-prefix))) |
4293 | (unless (file-directory-p dir) | |
194600a8 JPW |
4294 | (make-directory dir t)) |
4295 | (unless (directory-files dir nil | |
4296 | (concat "\\`" (regexp-quote | |
4297 | (file-name-nondirectory | |
4298 | auto-save-list-file-prefix))) | |
4299 | t) | |
4300 | (error "No previous sessions to recover"))) | |
6f4983e6 | 4301 | (let ((ls-lisp-support-shell-wildcards t)) |
7b3478a5 RS |
4302 | (dired (concat auto-save-list-file-prefix "*") |
4303 | (concat dired-listing-switches "t"))) | |
05e076c7 AS |
4304 | (save-excursion |
4305 | (goto-char (point-min)) | |
4306 | (or (looking-at " Move to the session you want to recover,") | |
4307 | (let ((inhibit-read-only t)) | |
4308 | ;; Each line starts with a space | |
4309 | ;; so that Font Lock mode won't highlight the first character. | |
4310 | (insert " Move to the session you want to recover,\n" | |
4311 | " then type C-c C-c to select it.\n\n" | |
4312 | " You can also delete some of these files;\n" | |
4313 | " type d on a line to mark that file for deletion.\n\n")))) | |
9aee5392 | 4314 | (use-local-map (nconc (make-sparse-keymap) (current-local-map))) |
80280bb7 | 4315 | (define-key (current-local-map) "\C-c\C-c" 'recover-session-finish)) |
9aee5392 | 4316 | |
80280bb7 | 4317 | (defun recover-session-finish () |
9aee5392 RS |
4318 | "Choose one saved session to recover auto-save files from. |
4319 | This command is used in the special Dired buffer created by | |
80280bb7 | 4320 | \\[recover-session]." |
9aee5392 RS |
4321 | (interactive) |
4322 | ;; Get the name of the session file to recover from. | |
4323 | (let ((file (dired-get-filename)) | |
953a03b2 | 4324 | files |
9aee5392 | 4325 | (buffer (get-buffer-create " *recover*"))) |
c11032b9 | 4326 | (dired-unmark 1) |
033ef863 | 4327 | (dired-do-flagged-delete t) |
9aee5392 RS |
4328 | (unwind-protect |
4329 | (save-excursion | |
4330 | ;; Read in the auto-save-list file. | |
4331 | (set-buffer buffer) | |
4332 | (erase-buffer) | |
4333 | (insert-file-contents file) | |
953a03b2 RS |
4334 | ;; Loop thru the text of that file |
4335 | ;; and get out the names of the files to recover. | |
4336 | (while (not (eobp)) | |
4337 | (let (thisfile autofile) | |
4338 | (if (eolp) | |
4339 | ;; This is a pair of lines for a non-file-visiting buffer. | |
4340 | ;; Get the auto-save file name and manufacture | |
4341 | ;; a "visited file name" from that. | |
4342 | (progn | |
4343 | (forward-line 1) | |
259be4e6 JB |
4344 | ;; If there is no auto-save file name, the |
4345 | ;; auto-save-list file is probably corrupted. | |
4346 | (unless (eolp) | |
4347 | (setq autofile | |
4348 | (buffer-substring-no-properties | |
4349 | (point) | |
e442c62b | 4350 | (line-end-position))) |
259be4e6 JB |
4351 | (setq thisfile |
4352 | (expand-file-name | |
4353 | (substring | |
4354 | (file-name-nondirectory autofile) | |
4355 | 1 -1) | |
4356 | (file-name-directory autofile)))) | |
953a03b2 RS |
4357 | (forward-line 1)) |
4358 | ;; This pair of lines is a file-visiting | |
4359 | ;; buffer. Use the visited file name. | |
4360 | (progn | |
4361 | (setq thisfile | |
4362 | (buffer-substring-no-properties | |
4363 | (point) (progn (end-of-line) (point)))) | |
4364 | (forward-line 1) | |
4365 | (setq autofile | |
4366 | (buffer-substring-no-properties | |
4367 | (point) (progn (end-of-line) (point)))) | |
4368 | (forward-line 1))) | |
4369 | ;; Ignore a file if its auto-save file does not exist now. | |
259be4e6 | 4370 | (if (and autofile (file-exists-p autofile)) |
953a03b2 RS |
4371 | (setq files (cons thisfile files))))) |
4372 | (setq files (nreverse files)) | |
945e1965 RS |
4373 | ;; The file contains a pair of line for each auto-saved buffer. |
4374 | ;; The first line of the pair contains the visited file name | |
4375 | ;; or is empty if the buffer was not visiting a file. | |
4376 | ;; The second line is the auto-save file name. | |
953a03b2 RS |
4377 | (if files |
4378 | (map-y-or-n-p "Recover %s? " | |
4379 | (lambda (file) | |
4380 | (condition-case nil | |
4381 | (save-excursion (recover-file file)) | |
76d5492b | 4382 | (error |
953a03b2 RS |
4383 | "Failed to recover `%s'" file))) |
4384 | files | |
4385 | '("file" "files" "recover")) | |
4386 | (message "No files can be recovered from this session now"))) | |
9aee5392 RS |
4387 | (kill-buffer buffer)))) |
4388 | ||
73ba610a | 4389 | (defun kill-some-buffers (&optional list) |
243a3ae0 | 4390 | "Kill some buffers. Asks the user whether to kill each one of them. |
bb8eaf67 | 4391 | Non-interactively, if optional argument LIST is non-nil, it |
243a3ae0 | 4392 | specifies the list of buffers to kill, asking for approval for each one." |
b4da00e9 | 4393 | (interactive) |
73ba610a RS |
4394 | (if (null list) |
4395 | (setq list (buffer-list))) | |
4396 | (while list | |
4397 | (let* ((buffer (car list)) | |
4398 | (name (buffer-name buffer))) | |
cbca0a4b RS |
4399 | (and name ; Can be nil for an indirect buffer |
4400 | ; if we killed the base buffer. | |
4401 | (not (string-equal name "")) | |
26b9ecbc | 4402 | (/= (aref name 0) ?\s) |
73ba610a RS |
4403 | (yes-or-no-p |
4404 | (format "Buffer %s %s. Kill? " | |
4405 | name | |
4406 | (if (buffer-modified-p buffer) | |
4407 | "HAS BEEN EDITED" "is unmodified"))) | |
4408 | (kill-buffer buffer))) | |
4409 | (setq list (cdr list)))) | |
b4da00e9 RM |
4410 | \f |
4411 | (defun auto-save-mode (arg) | |
4412 | "Toggle auto-saving of contents of current buffer. | |
f3e23606 | 4413 | With prefix argument ARG, turn auto-saving on if positive, else off." |
b4da00e9 RM |
4414 | (interactive "P") |
4415 | (setq buffer-auto-save-file-name | |
4416 | (and (if (null arg) | |
74b9c2af | 4417 | (or (not buffer-auto-save-file-name) |
4e0c8650 | 4418 | ;; If auto-save is off because buffer has shrunk, |
74b9c2af RS |
4419 | ;; then toggling should turn it on. |
4420 | (< buffer-saved-size 0)) | |
b4da00e9 RM |
4421 | (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) |
4422 | (if (and buffer-file-name auto-save-visited-file-name | |
4423 | (not buffer-read-only)) | |
4424 | buffer-file-name | |
4425 | (make-auto-save-file-name)))) | |
0b7f1ef2 RS |
4426 | ;; If -1 was stored here, to temporarily turn off saving, |
4427 | ;; turn it back on. | |
4428 | (and (< buffer-saved-size 0) | |
4429 | (setq buffer-saved-size 0)) | |
b4da00e9 RM |
4430 | (if (interactive-p) |
4431 | (message "Auto-save %s (in this buffer)" | |
4432 | (if buffer-auto-save-file-name "on" "off"))) | |
4433 | buffer-auto-save-file-name) | |
4434 | ||
4435 | (defun rename-auto-save-file () | |
4436 | "Adjust current buffer's auto save file name for current conditions. | |
4437 | Also rename any existing auto save file, if it was made in this session." | |
4438 | (let ((osave buffer-auto-save-file-name)) | |
4439 | (setq buffer-auto-save-file-name | |
4440 | (make-auto-save-file-name)) | |
4441 | (if (and osave buffer-auto-save-file-name | |
4442 | (not (string= buffer-auto-save-file-name buffer-file-name)) | |
4443 | (not (string= buffer-auto-save-file-name osave)) | |
4444 | (file-exists-p osave) | |
4445 | (recent-auto-save-p)) | |
4446 | (rename-file osave buffer-auto-save-file-name t)))) | |
4447 | ||
4448 | (defun make-auto-save-file-name () | |
4449 | "Return file name to use for auto-saves of current buffer. | |
4450 | Does not consider `auto-save-visited-file-name' as that variable is checked | |
4451 | before calling this function. You can redefine this for customization. | |
4452 | See also `auto-save-file-name-p'." | |
4453 | (if buffer-file-name | |
c1105d05 MA |
4454 | (let ((handler (find-file-name-handler buffer-file-name |
4455 | 'make-auto-save-file-name))) | |
4456 | (if handler | |
4457 | (funcall handler 'make-auto-save-file-name) | |
4458 | (let ((list auto-save-file-name-transforms) | |
4459 | (filename buffer-file-name) | |
4460 | result uniq) | |
4461 | ;; Apply user-specified translations | |
4462 | ;; to the file name. | |
4463 | (while (and list (not result)) | |
4464 | (if (string-match (car (car list)) filename) | |
4465 | (setq result (replace-match (cadr (car list)) t nil | |
4466 | filename) | |
4467 | uniq (car (cddr (car list))))) | |
4468 | (setq list (cdr list))) | |
4469 | (if result | |
4470 | (if uniq | |
4471 | (setq filename (concat | |
4472 | (file-name-directory result) | |
4473 | (subst-char-in-string | |
4474 | ?/ ?! | |
4475 | (replace-regexp-in-string "!" "!!" | |
4476 | filename)))) | |
4477 | (setq filename result))) | |
4478 | (setq result | |
4479 | (if (and (eq system-type 'ms-dos) | |
4480 | (not (msdos-long-file-names))) | |
4481 | ;; We truncate the file name to DOS 8+3 limits | |
4482 | ;; before doing anything else, because the regexp | |
4483 | ;; passed to string-match below cannot handle | |
4484 | ;; extensions longer than 3 characters, multiple | |
4485 | ;; dots, and other atrocities. | |
4486 | (let ((fn (dos-8+3-filename | |
4487 | (file-name-nondirectory buffer-file-name)))) | |
4488 | (string-match | |
4489 | "\\`\\([^.]+\\)\\(\\.\\(..?\\)?.?\\|\\)\\'" | |
4490 | fn) | |
4491 | (concat (file-name-directory buffer-file-name) | |
4492 | "#" (match-string 1 fn) | |
4493 | "." (match-string 3 fn) "#")) | |
4494 | (concat (file-name-directory filename) | |
4495 | "#" | |
4496 | (file-name-nondirectory filename) | |
4497 | "#"))) | |
4498 | ;; Make sure auto-save file names don't contain characters | |
4499 | ;; invalid for the underlying filesystem. | |
18b28ef1 | 4500 | (if (and (memq system-type '(ms-dos windows-nt cygwin)) |
c1105d05 MA |
4501 | ;; Don't modify remote (ange-ftp) filenames |
4502 | (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" result))) | |
4503 | (convert-standard-filename result) | |
4504 | result)))) | |
0a1763b4 RS |
4505 | |
4506 | ;; Deal with buffers that don't have any associated files. (Mail | |
4507 | ;; mode tends to create a good number of these.) | |
4508 | ||
7d483e8c | 4509 | (let ((buffer-name (buffer-name)) |
ff5c7181 | 4510 | (limit 0) |
77d18896 | 4511 | file-name) |
c3348e10 RS |
4512 | ;; Eliminate all slashes and backslashes by |
4513 | ;; replacing them with sequences that start with %. | |
4514 | ;; Quote % also, to keep distinct names distinct. | |
4515 | (while (string-match "[/\\%]" buffer-name limit) | |
4516 | (let* ((character (aref buffer-name (match-beginning 0))) | |
4517 | (replacement | |
4518 | (cond ((eq character ?%) "%%") | |
4519 | ((eq character ?/) "%+") | |
4520 | ((eq character ?\\) "%-")))) | |
4521 | (setq buffer-name (replace-match replacement t t buffer-name)) | |
4522 | (setq limit (1+ (match-end 0))))) | |
a8abaf83 | 4523 | ;; Generate the file name. |
ff5c7181 RS |
4524 | (setq file-name |
4525 | (make-temp-file | |
4526 | (let ((fname | |
4527 | (expand-file-name | |
4528 | (format "#%s#" buffer-name) | |
4529 | ;; Try a few alternative directories, to get one we can | |
4530 | ;; write it. | |
4531 | (cond | |
4532 | ((file-writable-p default-directory) default-directory) | |
4533 | ((file-writable-p "/var/tmp/") "/var/tmp/") | |
4534 | ("~/"))))) | |
18b28ef1 | 4535 | (if (and (memq system-type '(ms-dos windows-nt cygwin)) |
ff5c7181 RS |
4536 | ;; Don't modify remote (ange-ftp) filenames |
4537 | (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" fname))) | |
4538 | ;; The call to convert-standard-filename is in case | |
4539 | ;; buffer-name includes characters not allowed by the | |
4540 | ;; DOS/Windows filesystems. make-temp-file writes to the | |
4541 | ;; file it creates, so we must fix the file name _before_ | |
4542 | ;; make-temp-file is called. | |
4543 | (convert-standard-filename fname) | |
4544 | fname)) | |
4545 | nil "#")) | |
4546 | ;; make-temp-file creates the file, | |
4547 | ;; but we don't want it to exist until we do an auto-save. | |
4548 | (condition-case () | |
4549 | (delete-file file-name) | |
4550 | (file-error nil)) | |
4551 | file-name))) | |
b4da00e9 RM |
4552 | |
4553 | (defun auto-save-file-name-p (filename) | |
4554 | "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'. | |
4555 | FILENAME should lack slashes. You can redefine this for customization." | |
4556 | (string-match "^#.*#$" filename)) | |
4557 | \f | |
6f4983e6 RS |
4558 | (defun wildcard-to-regexp (wildcard) |
4559 | "Given a shell file name pattern WILDCARD, return an equivalent regexp. | |
4560 | The generated regexp will match a filename iff the filename | |
4561 | matches that wildcard according to shell rules. Only wildcards known | |
4562 | by `sh' are supported." | |
4563 | (let* ((i (string-match "[[.*+\\^$?]" wildcard)) | |
4564 | ;; Copy the initial run of non-special characters. | |
4565 | (result (substring wildcard 0 i)) | |
4566 | (len (length wildcard))) | |
4567 | ;; If no special characters, we're almost done. | |
4568 | (if i | |
4569 | (while (< i len) | |
4570 | (let ((ch (aref wildcard i)) | |
4571 | j) | |
4572 | (setq | |
4573 | result | |
4574 | (concat result | |
4575 | (cond | |
7e7c9c4e RS |
4576 | ((and (eq ch ?\[) |
4577 | (< (1+ i) len) | |
4578 | (eq (aref wildcard (1+ i)) ?\])) | |
4579 | "\\[") | |
6f4983e6 RS |
4580 | ((eq ch ?\[) ; [...] maps to regexp char class |
4581 | (progn | |
4582 | (setq i (1+ i)) | |
4583 | (concat | |
4584 | (cond | |
4585 | ((eq (aref wildcard i) ?!) ; [!...] -> [^...] | |
4586 | (progn | |
4587 | (setq i (1+ i)) | |
4588 | (if (eq (aref wildcard i) ?\]) | |
4589 | (progn | |
4590 | (setq i (1+ i)) | |
4591 | "[^]") | |
4592 | "[^"))) | |
4593 | ((eq (aref wildcard i) ?^) | |
4594 | ;; Found "[^". Insert a `\0' character | |
4595 | ;; (which cannot happen in a filename) | |
4596 | ;; into the character class, so that `^' | |
4597 | ;; is not the first character after `[', | |
4598 | ;; and thus non-special in a regexp. | |
4599 | (progn | |
4600 | (setq i (1+ i)) | |
4601 | "[\000^")) | |
4602 | ((eq (aref wildcard i) ?\]) | |
4603 | ;; I don't think `]' can appear in a | |
4604 | ;; character class in a wildcard, but | |
4605 | ;; let's be general here. | |
4606 | (progn | |
4607 | (setq i (1+ i)) | |
4608 | "[]")) | |
4609 | (t "[")) | |
4610 | (prog1 ; copy everything upto next `]'. | |
4611 | (substring wildcard | |
4612 | i | |
4613 | (setq j (string-match | |
4614 | "]" wildcard i))) | |
4615 | (setq i (if j (1- j) (1- len))))))) | |
4616 | ((eq ch ?.) "\\.") | |
4617 | ((eq ch ?*) "[^\000]*") | |
4618 | ((eq ch ?+) "\\+") | |
4619 | ((eq ch ?^) "\\^") | |
4620 | ((eq ch ?$) "\\$") | |
4621 | ((eq ch ?\\) "\\\\") ; probably cannot happen... | |
4622 | ((eq ch ??) "[^\000]") | |
4623 | (t (char-to-string ch))))) | |
4624 | (setq i (1+ i))))) | |
4625 | ;; Shell wildcards should match the entire filename, | |
4626 | ;; not its part. Make the regexp say so. | |
4627 | (concat "\\`" result "\\'"))) | |
4628 | \f | |
21540597 | 4629 | (defcustom list-directory-brief-switches |
b4da00e9 | 4630 | (if (eq system-type 'vax-vms) "" "-CF") |
ba83982b | 4631 | "Switches for `list-directory' to pass to `ls' for brief listing." |
21540597 RS |
4632 | :type 'string |
4633 | :group 'dired) | |
b4da00e9 | 4634 | |
21540597 | 4635 | (defcustom list-directory-verbose-switches |
b4da00e9 RM |
4636 | (if (eq system-type 'vax-vms) |
4637 | "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)" | |
4638 | "-l") | |
ba83982b | 4639 | "Switches for `list-directory' to pass to `ls' for verbose listing." |
21540597 RS |
4640 | :type 'string |
4641 | :group 'dired) | |
b4da00e9 | 4642 | |
5de148a2 RS |
4643 | (defun file-expand-wildcards (pattern &optional full) |
4644 | "Expand wildcard pattern PATTERN. | |
4db2a7de RS |
4645 | This returns a list of file names which match the pattern. |
4646 | ||
814af837 | 4647 | If PATTERN is written as an absolute file name, |
4db2a7de RS |
4648 | the values are absolute also. |
4649 | ||
4650 | If PATTERN is written as a relative file name, it is interpreted | |
4651 | relative to the current default directory, `default-directory'. | |
4652 | The file names returned are normally also relative to the current | |
4653 | default directory. However, if FULL is non-nil, they are absolute." | |
032388f3 RS |
4654 | (save-match-data |
4655 | (let* ((nondir (file-name-nondirectory pattern)) | |
4656 | (dirpart (file-name-directory pattern)) | |
4657 | ;; A list of all dirs that DIRPART specifies. | |
4658 | ;; This can be more than one dir | |
4659 | ;; if DIRPART contains wildcards. | |
4660 | (dirs (if (and dirpart (string-match "[[*?]" dirpart)) | |
4661 | (mapcar 'file-name-as-directory | |
4662 | (file-expand-wildcards (directory-file-name dirpart))) | |
4663 | (list dirpart))) | |
4664 | contents) | |
4665 | (while dirs | |
4666 | (when (or (null (car dirs)) ; Possible if DIRPART is not wild. | |
4667 | (file-directory-p (directory-file-name (car dirs)))) | |
4668 | (let ((this-dir-contents | |
4669 | ;; Filter out "." and ".." | |
4670 | (delq nil | |
4671 | (mapcar #'(lambda (name) | |
4672 | (unless (string-match "\\`\\.\\.?\\'" | |
4673 | (file-name-nondirectory name)) | |
4674 | name)) | |
4675 | (directory-files (or (car dirs) ".") full | |
4676 | (wildcard-to-regexp nondir)))))) | |
4677 | (setq contents | |
4678 | (nconc | |
4679 | (if (and (car dirs) (not full)) | |
4680 | (mapcar (function (lambda (name) (concat (car dirs) name))) | |
4681 | this-dir-contents) | |
4682 | this-dir-contents) | |
4683 | contents)))) | |
4684 | (setq dirs (cdr dirs))) | |
4685 | contents))) | |
5de148a2 | 4686 | |
b4da00e9 RM |
4687 | (defun list-directory (dirname &optional verbose) |
4688 | "Display a list of files in or matching DIRNAME, a la `ls'. | |
4689 | DIRNAME is globbed by the shell if necessary. | |
4690 | Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. | |
4691 | Actions controlled by variables `list-directory-brief-switches' | |
4692 | and `list-directory-verbose-switches'." | |
4693 | (interactive (let ((pfx current-prefix-arg)) | |
4694 | (list (read-file-name (if pfx "List directory (verbose): " | |
4695 | "List directory (brief): ") | |
4696 | nil default-directory nil) | |
4697 | pfx))) | |
4698 | (let ((switches (if verbose list-directory-verbose-switches | |
84905190 RS |
4699 | list-directory-brief-switches)) |
4700 | buffer) | |
b4da00e9 RM |
4701 | (or dirname (setq dirname default-directory)) |
4702 | (setq dirname (expand-file-name dirname)) | |
4703 | (with-output-to-temp-buffer "*Directory*" | |
84905190 | 4704 | (setq buffer standard-output) |
b4da00e9 RM |
4705 | (buffer-disable-undo standard-output) |
4706 | (princ "Directory ") | |
4707 | (princ dirname) | |
4708 | (terpri) | |
c3554e95 RS |
4709 | (save-excursion |
4710 | (set-buffer "*Directory*") | |
4711 | (let ((wildcard (not (file-directory-p dirname)))) | |
84905190 RS |
4712 | (insert-directory dirname switches wildcard (not wildcard))))) |
4713 | ;; Finishing with-output-to-temp-buffer seems to clobber default-directory. | |
4714 | (with-current-buffer buffer | |
4715 | (setq default-directory | |
4716 | (if (file-directory-p dirname) | |
4717 | (file-name-as-directory dirname) | |
4718 | (file-name-directory dirname)))))) | |
c3554e95 | 4719 | |
ffc0e1ca AS |
4720 | (defun shell-quote-wildcard-pattern (pattern) |
4721 | "Quote characters special to the shell in PATTERN, leave wildcards alone. | |
4722 | ||
4723 | PATTERN is assumed to represent a file-name wildcard suitable for the | |
4724 | underlying filesystem. For Unix and GNU/Linux, the characters from the | |
4725 | set [ \\t\\n;<>&|()#$] are quoted with a backslash; for DOS/Windows, all | |
4726 | the parts of the pattern which don't include wildcard characters are | |
4727 | quoted with double quotes. | |
4728 | Existing quote characters in PATTERN are left alone, so you can pass | |
4729 | PATTERN that already quotes some of the special characters." | |
4730 | (save-match-data | |
4731 | (cond | |
c60ee5e7 | 4732 | ((memq system-type '(ms-dos windows-nt cygwin)) |
ffc0e1ca AS |
4733 | ;; DOS/Windows don't allow `"' in file names. So if the |
4734 | ;; argument has quotes, we can safely assume it is already | |
4735 | ;; quoted by the caller. | |
4736 | (if (or (string-match "[\"]" pattern) | |
4737 | ;; We quote [&()#$'] in case their shell is a port of a | |
4738 | ;; Unixy shell. We quote [,=+] because stock DOS and | |
4739 | ;; Windows shells require that in some cases, such as | |
4740 | ;; passing arguments to batch files that use positional | |
4741 | ;; arguments like %1. | |
4742 | (not (string-match "[ \t;&()#$',=+]" pattern))) | |
4743 | pattern | |
4744 | (let ((result "\"") | |
4745 | (beg 0) | |
4746 | end) | |
4747 | (while (string-match "[*?]+" pattern beg) | |
4748 | (setq end (match-beginning 0) | |
4749 | result (concat result (substring pattern beg end) | |
4750 | "\"" | |
4751 | (substring pattern end (match-end 0)) | |
4752 | "\"") | |
4753 | beg (match-end 0))) | |
4754 | (concat result (substring pattern beg) "\"")))) | |
4755 | (t | |
4756 | (let ((beg 0)) | |
4757 | (while (string-match "[ \t\n;<>&|()#$]" pattern beg) | |
4758 | (setq pattern | |
4759 | (concat (substring pattern 0 (match-beginning 0)) | |
4760 | "\\" | |
4761 | (substring pattern (match-beginning 0))) | |
4762 | beg (1+ (match-end 0))))) | |
4763 | pattern)))) | |
4764 | ||
4765 | ||
c3554e95 RS |
4766 | (defvar insert-directory-program "ls" |
4767 | "Absolute or relative name of the `ls' program used by `insert-directory'.") | |
4768 | ||
f4d04672 | 4769 | (defcustom directory-free-space-program "df" |
ba83982b | 4770 | "Program to get the amount of free space on a file system. |
f4d04672 RS |
4771 | We assume the output has the format of `df'. |
4772 | The value of this variable must be just a command name or file name; | |
4773 | if you want to specify options, use `directory-free-space-args'. | |
4774 | ||
01b26b90 EZ |
4775 | A value of nil disables this feature. |
4776 | ||
4777 | If the function `file-system-info' is defined, it is always used in | |
4778 | preference to the program given by this variable." | |
f4d04672 RS |
4779 | :type '(choice (string :tag "Program") (const :tag "None" nil)) |
4780 | :group 'dired) | |
4781 | ||
525fdbc9 AS |
4782 | (defcustom directory-free-space-args |
4783 | (if (eq system-type 'darwin) "-k" "-Pk") | |
ba83982b | 4784 | "Options to use when running `directory-free-space-program'." |
f4d04672 RS |
4785 | :type 'string |
4786 | :group 'dired) | |
4787 | ||
01b26b90 | 4788 | (defun get-free-disk-space (dir) |
26b9ecbc | 4789 | "Return the amount of free space on directory DIR's file system. |
01b26b90 | 4790 | The result is a string that gives the number of free 1KB blocks, |
26b9ecbc | 4791 | or nil if the system call or the program which retrieve the information |
06531fc3 | 4792 | fail. It returns also nil when DIR is a remote directory. |
01b26b90 EZ |
4793 | |
4794 | This function calls `file-system-info' if it is available, or invokes the | |
4795 | program specified by `directory-free-space-program' if that is non-nil." | |
06531fc3 MA |
4796 | (when (not (file-remote-p dir)) |
4797 | ;; Try to find the number of free blocks. Non-Posix systems don't | |
4798 | ;; always have df, but might have an equivalent system call. | |
4799 | (if (fboundp 'file-system-info) | |
4800 | (let ((fsinfo (file-system-info dir))) | |
4801 | (if fsinfo | |
4802 | (format "%.0f" (/ (nth 2 fsinfo) 1024)))) | |
4803 | (save-match-data | |
4804 | (with-temp-buffer | |
4805 | (when (and directory-free-space-program | |
4806 | (eq 0 (call-process directory-free-space-program | |
4807 | nil t nil | |
4808 | directory-free-space-args | |
4809 | dir))) | |
4810 | ;; Usual format is a header line followed by a line of | |
4811 | ;; numbers. | |
4812 | (goto-char (point-min)) | |
4813 | (forward-line 1) | |
4814 | (if (not (eobp)) | |
4815 | (progn | |
4816 | ;; Move to the end of the "available blocks" number. | |
4817 | (skip-chars-forward "^ \t") | |
4818 | (forward-word 3) | |
4819 | ;; Copy it into AVAILABLE. | |
4820 | (let ((end (point))) | |
4821 | (forward-word -1) | |
4822 | (buffer-substring (point) end)))))))))) | |
01b26b90 | 4823 | |
9bc260cf MA |
4824 | ;; The following expression replaces `dired-move-to-filename-regexp'. |
4825 | (defvar directory-listing-before-filename-regexp | |
4826 | (let* ((l "\\([A-Za-z]\\|[^\0-\177]\\)") | |
4827 | (l-or-quote "\\([A-Za-z']\\|[^\0-\177]\\)") | |
4828 | ;; In some locales, month abbreviations are as short as 2 letters, | |
4829 | ;; and they can be followed by ".". | |
4830 | ;; In Breton, a month name can include a quote character. | |
4831 | (month (concat l-or-quote l-or-quote "+\\.?")) | |
4832 | (s " ") | |
4833 | (yyyy "[0-9][0-9][0-9][0-9]") | |
4834 | (dd "[ 0-3][0-9]") | |
4835 | (HH:MM "[ 0-2][0-9][:.][0-5][0-9]") | |
4836 | (seconds "[0-6][0-9]\\([.,][0-9]+\\)?") | |
4837 | (zone "[-+][0-2][0-9][0-5][0-9]") | |
4838 | (iso-mm-dd "[01][0-9]-[0-3][0-9]") | |
4839 | (iso-time (concat HH:MM "\\(:" seconds "\\( ?" zone "\\)?\\)?")) | |
4840 | (iso (concat "\\(\\(" yyyy "-\\)?" iso-mm-dd "[ T]" iso-time | |
4841 | "\\|" yyyy "-" iso-mm-dd "\\)")) | |
4842 | (western (concat "\\(" month s "+" dd "\\|" dd "\\.?" s month "\\)" | |
4843 | s "+" | |
4844 | "\\(" HH:MM "\\|" yyyy "\\)")) | |
4845 | (western-comma (concat month s "+" dd "," s "+" yyyy)) | |
4846 | ;; Japanese MS-Windows ls-lisp has one-digit months, and | |
4847 | ;; omits the Kanji characters after month and day-of-month. | |
4848 | ;; On Mac OS X 10.3, the date format in East Asian locales is | |
4849 | ;; day-of-month digits followed by month digits. | |
4850 | (mm "[ 0-1]?[0-9]") | |
4851 | (east-asian | |
4852 | (concat "\\(" mm l "?" s dd l "?" s "+" | |
4853 | "\\|" dd s mm s "+" "\\)" | |
4854 | "\\(" HH:MM "\\|" yyyy l "?" "\\)"))) | |
4855 | ;; The "[0-9]" below requires the previous column to end in a digit. | |
4856 | ;; This avoids recognizing `1 may 1997' as a date in the line: | |
4857 | ;; -r--r--r-- 1 may 1997 1168 Oct 19 16:49 README | |
4858 | ||
4859 | ;; The "[BkKMGTPEZY]?" below supports "ls -alh" output. | |
4860 | ;; The ".*" below finds the last match if there are multiple matches. | |
4861 | ;; This avoids recognizing `jservice 10 1024' as a date in the line: | |
4862 | ;; drwxr-xr-x 3 jservice 10 1024 Jul 2 1997 esg-host | |
4863 | ||
4864 | ;; vc dired listings provide the state or blanks between file | |
4865 | ;; permissions and date. The state is always surrounded by | |
4866 | ;; parantheses: | |
4867 | ;; -rw-r--r-- (modified) 2005-10-22 21:25 files.el | |
4868 | ;; This is not supported yet. | |
4869 | (concat ".*[0-9][BkKMGTPEZY]?" s | |
4870 | "\\(" western "\\|" western-comma "\\|" east-asian "\\|" iso "\\)" | |
4871 | s "+")) | |
4872 | "Regular expression to match up to the file name in a directory listing. | |
4873 | The default value is designed to recognize dates and times | |
4874 | regardless of the language.") | |
01b26b90 | 4875 | |
a1b0c2a7 RS |
4876 | (defvar insert-directory-ls-version 'unknown) |
4877 | ||
c3554e95 RS |
4878 | ;; insert-directory |
4879 | ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and | |
4880 | ;; FULL-DIRECTORY-P is nil. | |
4881 | ;; The single line of output must display FILE's name as it was | |
4882 | ;; given, namely, an absolute path name. | |
4883 | ;; - must insert exactly one line for each file if WILDCARD or | |
4884 | ;; FULL-DIRECTORY-P is t, plus one optional "total" line | |
4885 | ;; before the file lines, plus optional text after the file lines. | |
4886 | ;; Lines are delimited by "\n", so filenames containing "\n" are not | |
4887 | ;; allowed. | |
4888 | ;; File lines should display the basename. | |
4889 | ;; - must be consistent with | |
4890 | ;; - functions dired-move-to-filename, (these two define what a file line is) | |
4891 | ;; dired-move-to-end-of-filename, | |
4892 | ;; dired-between-files, (shortcut for (not (dired-move-to-filename))) | |
4893 | ;; dired-insert-headerline | |
4894 | ;; dired-after-subdir-garbage (defines what a "total" line is) | |
4895 | ;; - variable dired-subdir-regexp | |
1fc85dae KG |
4896 | ;; - may be passed "--dired" as the first argument in SWITCHES. |
4897 | ;; Filename handlers might have to remove this switch if their | |
4898 | ;; "ls" command does not support it. | |
c3554e95 | 4899 | (defun insert-directory (file switches &optional wildcard full-directory-p) |
a18b7c81 | 4900 | "Insert directory listing for FILE, formatted according to SWITCHES. |
c3554e95 | 4901 | Leaves point after the inserted text. |
8f8607be LT |
4902 | SWITCHES may be a string of options, or a list of strings |
4903 | representing individual options. | |
c3554e95 RS |
4904 | Optional third arg WILDCARD means treat FILE as shell wildcard. |
4905 | Optional fourth arg FULL-DIRECTORY-P means file is a directory and | |
4906 | switches do not contain `d', so that a full listing is expected. | |
4907 | ||
4908 | This works by running a directory listing program | |
406e12d9 | 4909 | whose name is in the variable `insert-directory-program'. |
8f8607be LT |
4910 | If WILDCARD, it also runs the shell specified by `shell-file-name'. |
4911 | ||
60ce7e3e | 4912 | When SWITCHES contains the long `--dired' option, this function |
8f8607be LT |
4913 | treats it specially, for the sake of dired. However, the |
4914 | normally equivalent short `-D' option is just passed on to | |
4915 | `insert-directory-program', as any other option." | |
c870ab8e | 4916 | ;; We need the directory in order to find the right handler. |
d2473540 AS |
4917 | (let ((handler (find-file-name-handler (expand-file-name file) |
4918 | 'insert-directory))) | |
ebad92dc | 4919 | (if handler |
c3554e95 RS |
4920 | (funcall handler 'insert-directory file switches |
4921 | wildcard full-directory-p) | |
b4da00e9 | 4922 | (if (eq system-type 'vax-vms) |
c3554e95 | 4923 | (vms-read-directory file switches (current-buffer)) |
818286f4 | 4924 | (let (result (beg (point))) |
ebad92dc RS |
4925 | |
4926 | ;; Read the actual directory using `insert-directory-program'. | |
4927 | ;; RESULT gets the status code. | |
99f01c91 KH |
4928 | (let* (;; We at first read by no-conversion, then after |
4929 | ;; putting text property `dired-filename, decode one | |
4930 | ;; bunch by one to preserve that property. | |
4931 | (coding-system-for-read 'no-conversion) | |
4932 | ;; This is to control encoding the arguments in call-process. | |
c60ee5e7 | 4933 | (coding-system-for-write |
82e22b57 KH |
4934 | (and enable-multibyte-characters |
4935 | (or file-name-coding-system | |
99f01c91 | 4936 | default-file-name-coding-system)))) |
ebad92dc RS |
4937 | (setq result |
4938 | (if wildcard | |
4939 | ;; Run ls in the directory part of the file pattern | |
4940 | ;; using the last component as argument. | |
4941 | (let ((default-directory | |
4942 | (if (file-name-absolute-p file) | |
4943 | (file-name-directory file) | |
4944 | (file-name-directory (expand-file-name file)))) | |
4945 | (pattern (file-name-nondirectory file))) | |
4946 | (call-process | |
4947 | shell-file-name nil t nil | |
4948 | "-c" | |
4949 | (concat (if (memq system-type '(ms-dos windows-nt)) | |
4950 | "" | |
4951 | "\\") ; Disregard Unix shell aliases! | |
4952 | insert-directory-program | |
4953 | " -d " | |
4954 | (if (stringp switches) | |
4955 | switches | |
4956 | (mapconcat 'identity switches " ")) | |
4957 | " -- " | |
4958 | ;; Quote some characters that have | |
4959 | ;; special meanings in shells; but | |
4960 | ;; don't quote the wildcards--we want | |
4961 | ;; them to be special. We also | |
4962 | ;; currently don't quote the quoting | |
4963 | ;; characters in case people want to | |
4964 | ;; use them explicitly to quote | |
4965 | ;; wildcard characters. | |
4966 | (shell-quote-wildcard-pattern pattern)))) | |
4967 | ;; SunOS 4.1.3, SVr4 and others need the "." to list the | |
4968 | ;; directory if FILE is a symbolic link. | |
4969 | (apply 'call-process | |
4970 | insert-directory-program nil t nil | |
4971 | (append | |
4972 | (if (listp switches) switches | |
4973 | (unless (equal switches "") | |
4974 | ;; Split the switches at any spaces so we can | |
4975 | ;; pass separate options as separate args. | |
4976 | (split-string switches))) | |
4977 | ;; Avoid lossage if FILE starts with `-'. | |
4978 | '("--") | |
4979 | (progn | |
4980 | (if (string-match "\\`~" file) | |
4981 | (setq file (expand-file-name file))) | |
4982 | (list | |
4983 | (if full-directory-p | |
4984 | (concat (file-name-as-directory file) ".") | |
4985 | file)))))))) | |
4986 | ||
a1b0c2a7 RS |
4987 | ;; If we got "//DIRED//" in the output, it means we got a real |
4988 | ;; directory listing, even if `ls' returned nonzero. | |
4989 | ;; So ignore any errors. | |
4990 | (when (if (stringp switches) | |
4991 | (string-match "--dired\\>" switches) | |
4992 | (member "--dired" switches)) | |
4993 | (save-excursion | |
4994 | (forward-line -2) | |
4995 | (when (looking-at "//SUBDIRED//") | |
4996 | (forward-line -1)) | |
4997 | (if (looking-at "//DIRED//") | |
4998 | (setq result 0)))) | |
4999 | ||
5000 | (when (and (not (eq 0 result)) | |
5001 | (eq insert-directory-ls-version 'unknown)) | |
5002 | ;; The first time ls returns an error, | |
5003 | ;; find the version numbers of ls, | |
5004 | ;; and set insert-directory-ls-version | |
5005 | ;; to > if it is more than 5.2.1, < if it is less, nil if it | |
5006 | ;; is equal or if the info cannot be obtained. | |
5007 | ;; (That can mean it isn't GNU ls.) | |
5008 | (let ((version-out | |
5009 | (with-temp-buffer | |
5010 | (call-process "ls" nil t nil "--version") | |
5011 | (buffer-string)))) | |
5012 | (if (string-match "ls (.*utils) \\([0-9.]*\\)$" version-out) | |
5013 | (let* ((version (match-string 1 version-out)) | |
5014 | (split (split-string version "[.]")) | |
027a4b6b | 5015 | (numbers (mapcar 'string-to-number split)) |
a1b0c2a7 RS |
5016 | (min '(5 2 1)) |
5017 | comparison) | |
5018 | (while (and (not comparison) (or numbers min)) | |
5019 | (cond ((null min) | |
5020 | (setq comparison '>)) | |
5021 | ((null numbers) | |
5022 | (setq comparison '<)) | |
5023 | ((> (car numbers) (car min)) | |
5024 | (setq comparison '>)) | |
5025 | ((< (car numbers) (car min)) | |
5026 | (setq comparison '<)) | |
5027 | (t | |
5028 | (setq numbers (cdr numbers) | |
5029 | min (cdr min))))) | |
5030 | (setq insert-directory-ls-version (or comparison '=))) | |
5031 | (setq insert-directory-ls-version nil)))) | |
5032 | ||
5033 | ;; For GNU ls versions 5.2.2 and up, ignore minor errors. | |
5034 | (when (and (eq 1 result) (eq insert-directory-ls-version '>)) | |
5035 | (setq result 0)) | |
5036 | ||
ebad92dc | 5037 | ;; If `insert-directory-program' failed, signal an error. |
15502042 | 5038 | (unless (eq 0 result) |
f2440e42 RS |
5039 | ;; Delete the error message it may have output. |
5040 | (delete-region beg (point)) | |
15502042 EZ |
5041 | ;; On non-Posix systems, we cannot open a directory, so |
5042 | ;; don't even try, because that will always result in | |
5043 | ;; the ubiquitous "Access denied". Instead, show the | |
5044 | ;; command line so the user can try to guess what went wrong. | |
5045 | (if (and (file-directory-p file) | |
5046 | (memq system-type '(ms-dos windows-nt))) | |
5047 | (error | |
5048 | "Reading directory: \"%s %s -- %s\" exited with status %s" | |
5049 | insert-directory-program | |
5050 | (if (listp switches) (concat switches) switches) | |
5051 | file result) | |
5052 | ;; Unix. Access the file to get a suitable error. | |
5053 | (access-file file "Reading directory") | |
5054 | (error "Listing directory failed but `access-file' worked"))) | |
ebad92dc | 5055 | |
8f8607be LT |
5056 | (when (if (stringp switches) |
5057 | (string-match "--dired\\>" switches) | |
5058 | (member "--dired" switches)) | |
9bb99df6 LT |
5059 | ;; The following overshoots by one line for an empty |
5060 | ;; directory listed with "--dired", but without "-a" | |
5061 | ;; switch, where the ls output contains a | |
5062 | ;; "//DIRED-OPTIONS//" line, but no "//DIRED//" line. | |
5063 | ;; We take care of that case later. | |
ff7affeb | 5064 | (forward-line -2) |
9423860f AS |
5065 | (when (looking-at "//SUBDIRED//") |
5066 | (delete-region (point) (progn (forward-line 1) (point))) | |
5067 | (forward-line -1)) | |
9bb99df6 LT |
5068 | (if (looking-at "//DIRED//") |
5069 | (let ((end (line-end-position)) | |
5070 | (linebeg (point)) | |
5071 | error-lines) | |
5072 | ;; Find all the lines that are error messages, | |
5073 | ;; and record the bounds of each one. | |
5074 | (goto-char beg) | |
5075 | (while (< (point) linebeg) | |
5076 | (or (eql (following-char) ?\s) | |
5077 | (push (list (point) (line-end-position)) error-lines)) | |
5078 | (forward-line 1)) | |
5079 | (setq error-lines (nreverse error-lines)) | |
5080 | ;; Now read the numeric positions of file names. | |
5081 | (goto-char linebeg) | |
5082 | (forward-word 1) | |
5083 | (forward-char 3) | |
5084 | (while (< (point) end) | |
5085 | (let ((start (insert-directory-adj-pos | |
5086 | (+ beg (read (current-buffer))) | |
5087 | error-lines)) | |
5088 | (end (insert-directory-adj-pos | |
a1b0c2a7 | 5089 | (+ beg (read (current-buffer))) |
9bb99df6 | 5090 | error-lines))) |
26b9ecbc | 5091 | (if (memq (char-after end) '(?\n ?\s)) |
9bb99df6 LT |
5092 | ;; End is followed by \n or by " -> ". |
5093 | (put-text-property start end 'dired-filename t) | |
5094 | ;; It seems that we can't trust ls's output as to | |
5095 | ;; byte positions of filenames. | |
5096 | (put-text-property beg (point) 'dired-filename nil) | |
5097 | (end-of-line)))) | |
5098 | (goto-char end) | |
5099 | (beginning-of-line) | |
5100 | (delete-region (point) (progn (forward-line 1) (point)))) | |
5101 | ;; Take care of the case where the ls output contains a | |
5102 | ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line | |
5103 | ;; and we went one line too far back (see above). | |
5104 | (forward-line 1)) | |
5105 | (if (looking-at "//DIRED-OPTIONS//") | |
5106 | (delete-region (point) (progn (forward-line 1) (point))))) | |
ff7affeb | 5107 | |
99f01c91 | 5108 | ;; Now decode what read if necessary. |
b6647390 KH |
5109 | (let ((coding (or coding-system-for-read |
5110 | file-name-coding-system | |
5111 | default-file-name-coding-system | |
5112 | 'undecided)) | |
0bded065 | 5113 | coding-no-eol |
99f01c91 | 5114 | val pos) |
b6647390 KH |
5115 | (when (and enable-multibyte-characters |
5116 | (not (memq (coding-system-base coding) | |
5117 | '(raw-text no-conversion)))) | |
5118 | ;; If no coding system is specified or detection is | |
5119 | ;; requested, detect the coding. | |
5120 | (if (eq (coding-system-base coding) 'undecided) | |
5121 | (setq coding (detect-coding-region beg (point) t))) | |
5122 | (if (not (eq (coding-system-base coding) 'undecided)) | |
5123 | (save-restriction | |
0bded065 AS |
5124 | (setq coding-no-eol |
5125 | (coding-system-change-eol-conversion coding 'unix)) | |
b6647390 KH |
5126 | (narrow-to-region beg (point)) |
5127 | (goto-char (point-min)) | |
5128 | (while (not (eobp)) | |
5129 | (setq pos (point) | |
5130 | val (get-text-property (point) 'dired-filename)) | |
5131 | (goto-char (next-single-property-change | |
5132 | (point) 'dired-filename nil (point-max))) | |
0bded065 AS |
5133 | ;; Force no eol conversion on a file name, so |
5134 | ;; that CR is preserved. | |
5135 | (decode-coding-region pos (point) | |
5136 | (if val coding-no-eol coding)) | |
b6647390 KH |
5137 | (if val |
5138 | (put-text-property pos (point) | |
5139 | 'dired-filename t))))))) | |
99f01c91 | 5140 | |
75bb5ca4 AS |
5141 | (if full-directory-p |
5142 | ;; Try to insert the amount of free space. | |
5143 | (save-excursion | |
5144 | (goto-char beg) | |
5145 | ;; First find the line to put it on. | |
5146 | (when (re-search-forward "^ *\\(total\\)" nil t) | |
5147 | (let ((available (get-free-disk-space "."))) | |
5148 | (when available | |
5149 | ;; Replace "total" with "used", to avoid confusion. | |
5150 | (replace-match "total used in directory" nil nil nil 1) | |
5151 | (end-of-line) | |
5152 | (insert " available " available))))))))))) | |
34342a07 | 5153 | |
a1b0c2a7 | 5154 | (defun insert-directory-adj-pos (pos error-lines) |
fead94d6 | 5155 | "Convert `ls --dired' file name position value POS to a buffer position. |
a1b0c2a7 RS |
5156 | File name position values returned in ls --dired output |
5157 | count only stdout; they don't count the error messages sent to stderr. | |
5158 | So this function converts to them to real buffer positions. | |
5159 | ERROR-LINES is a list of buffer positions of error message lines, | |
5160 | of the form (START END)." | |
5161 | (while (and error-lines (< (caar error-lines) pos)) | |
5162 | (setq pos (+ pos (- (nth 1 (car error-lines)) (nth 0 (car error-lines))))) | |
5163 | (pop error-lines)) | |
5164 | pos) | |
5165 | ||
bc22fd18 EZ |
5166 | (defun insert-directory-safely (file switches |
5167 | &optional wildcard full-directory-p) | |
5168 | "Insert directory listing for FILE, formatted according to SWITCHES. | |
5169 | ||
5170 | Like `insert-directory', but if FILE does not exist, it inserts a | |
5171 | message to that effect instead of signaling an error." | |
5172 | (if (file-exists-p file) | |
5173 | (insert-directory file switches wildcard full-directory-p) | |
5174 | ;; Simulate the message printed by `ls'. | |
5175 | (insert (format "%s: No such file or directory\n" file)))) | |
5176 | ||
88902b35 | 5177 | (defvar kill-emacs-query-functions nil |
65d5c6de | 5178 | "Functions to call with no arguments to query about killing Emacs. |
78c793d1 RS |
5179 | If any of these functions returns nil, killing Emacs is cancelled. |
5180 | `save-buffers-kill-emacs' (\\[save-buffers-kill-emacs]) calls these functions, | |
5181 | but `kill-emacs', the low level primitive, does not. | |
5182 | See also `kill-emacs-hook'.") | |
88902b35 | 5183 | |
11f15305 | 5184 | (defcustom confirm-kill-emacs nil |
9c2ba08f EZ |
5185 | "How to ask for confirmation when leaving Emacs. |
5186 | If nil, the default, don't ask at all. If the value is non-nil, it should | |
5187 | be a predicate function such as `yes-or-no-p'." | |
11f15305 GM |
5188 | :type '(choice (const :tag "Ask with yes-or-no-p" yes-or-no-p) |
5189 | (const :tag "Ask with y-or-n-p" y-or-n-p) | |
5190 | (const :tag "Don't confirm" nil)) | |
bdd9ab6e | 5191 | :group 'convenience |
11f15305 GM |
5192 | :version "21.1") |
5193 | ||
b4da00e9 RM |
5194 | (defun save-buffers-kill-emacs (&optional arg) |
5195 | "Offer to save each buffer, then kill this Emacs process. | |
5196 | With prefix arg, silently save all file-visiting buffers, then kill." | |
5197 | (interactive "P") | |
5198 | (save-some-buffers arg t) | |
5199 | (and (or (not (memq t (mapcar (function | |
5200 | (lambda (buf) (and (buffer-file-name buf) | |
5201 | (buffer-modified-p buf)))) | |
5202 | (buffer-list)))) | |
5203 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) | |
5204 | (or (not (fboundp 'process-list)) | |
5205 | ;; process-list is not defined on VMS. | |
5206 | (let ((processes (process-list)) | |
5207 | active) | |
5208 | (while processes | |
48a4a1fb KS |
5209 | (and (memq (process-status (car processes)) '(run stop open listen)) |
5210 | (process-query-on-exit-flag (car processes)) | |
b4da00e9 RM |
5211 | (setq active t)) |
5212 | (setq processes (cdr processes))) | |
5213 | (or (not active) | |
48a4a1fb | 5214 | (list-processes t) |
b4da00e9 | 5215 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) |
88902b35 | 5216 | ;; Query the user for other things, perhaps. |
fb15c113 | 5217 | (run-hook-with-args-until-failure 'kill-emacs-query-functions) |
11f15305 GM |
5218 | (or (null confirm-kill-emacs) |
5219 | (funcall confirm-kill-emacs "Really exit Emacs? ")) | |
b4da00e9 RM |
5220 | (kill-emacs))) |
5221 | \f | |
ffc0e1ca | 5222 | ;; We use /: as a prefix to "quote" a file name |
47afc068 RS |
5223 | ;; so that magic file name handlers will not apply to it. |
5224 | ||
5225 | (setq file-name-handler-alist | |
5226 | (cons '("\\`/:" . file-name-non-special) | |
5227 | file-name-handler-alist)) | |
5228 | ||
5229 | ;; We depend on being the last handler on the list, | |
5230 | ;; so that anything else which does need handling | |
5231 | ;; has been handled already. | |
5232 | ;; So it is safe for us to inhibit *all* magic file name handlers. | |
5233 | ||
5234 | (defun file-name-non-special (operation &rest arguments) | |
5235 | (let ((file-name-handler-alist nil) | |
5cb1f728 KH |
5236 | (default-directory |
5237 | (if (eq operation 'insert-directory) | |
5238 | (directory-file-name | |
ffc0e1ca | 5239 | (expand-file-name |
5cb1f728 KH |
5240 | (unhandled-file-name-directory default-directory))) |
5241 | default-directory)) | |
47afc068 RS |
5242 | ;; Get a list of the indices of the args which are file names. |
5243 | (file-arg-indices | |
5244 | (cdr (or (assq operation | |
ae3b2983 | 5245 | ;; The first six are special because they |
47afc068 RS |
5246 | ;; return a file name. We want to include the /: |
5247 | ;; in the return value. | |
5248 | ;; So just avoid stripping it in the first place. | |
5249 | '((expand-file-name . nil) | |
5250 | (file-name-directory . nil) | |
5251 | (file-name-as-directory . nil) | |
5252 | (directory-file-name . nil) | |
c736f678 | 5253 | (file-name-sans-versions . nil) |
ae3b2983 | 5254 | (find-backup-file-name . nil) |
c736f678 | 5255 | ;; `identity' means just return the first arg |
6750c852 RS |
5256 | ;; not stripped of its quoting. |
5257 | (substitute-in-file-name identity) | |
ae3b2983 MA |
5258 | ;; `add' means add "/:" to the result. |
5259 | (file-truename add 0) | |
5260 | ;; `quote' means add "/:" to buffer-file-name. | |
5261 | (insert-file-contents quote 0) | |
5262 | ;; `unquote-then-quote' means set buffer-file-name | |
5263 | ;; temporarily to unquoted filename. | |
5264 | (verify-visited-file-modtime unquote-then-quote) | |
5265 | ;; List the arguments which are filenames. | |
c37adaa5 SM |
5266 | (file-name-completion 1) |
5267 | (file-name-all-completions 1) | |
ae3b2983 | 5268 | (write-region 2 5) |
47afc068 RS |
5269 | (rename-file 0 1) |
5270 | (copy-file 0 1) | |
5271 | (make-symbolic-link 0 1) | |
5272 | (add-name-to-file 0 1))) | |
5273 | ;; For all other operations, treat the first argument only | |
5274 | ;; as the file name. | |
5275 | '(nil 0)))) | |
6750c852 | 5276 | method |
47afc068 RS |
5277 | ;; Copy ARGUMENTS so we can replace elements in it. |
5278 | (arguments (copy-sequence arguments))) | |
6750c852 RS |
5279 | (if (symbolp (car file-arg-indices)) |
5280 | (setq method (pop file-arg-indices))) | |
5281 | ;; Strip off the /: from the file names that have it. | |
47afc068 | 5282 | (save-match-data |
18b9dced | 5283 | (while (consp file-arg-indices) |
fe4d9852 KH |
5284 | (let ((pair (nthcdr (car file-arg-indices) arguments))) |
5285 | (and (car pair) | |
5286 | (string-match "\\`/:" (car pair)) | |
5287 | (setcar pair | |
5288 | (if (= (length (car pair)) 2) | |
5289 | "/" | |
5290 | (substring (car pair) 2))))) | |
47afc068 | 5291 | (setq file-arg-indices (cdr file-arg-indices)))) |
6750c852 RS |
5292 | (cond ((eq method 'identity) |
5293 | (car arguments)) | |
ae3b2983 | 5294 | ((eq method 'add) |
6750c852 | 5295 | (concat "/:" (apply operation arguments))) |
ae3b2983 | 5296 | ((eq method 'quote) |
e8f30180 RS |
5297 | (unwind-protect |
5298 | (apply operation arguments) | |
ae3b2983 MA |
5299 | (setq buffer-file-name (concat "/:" buffer-file-name)))) |
5300 | ((eq method 'unquote-then-quote) | |
5301 | (let (res) | |
5302 | (setq buffer-file-name (substring buffer-file-name 2)) | |
5303 | (setq res (apply operation arguments)) | |
5304 | (setq buffer-file-name (concat "/:" buffer-file-name)) | |
5305 | res)) | |
6750c852 RS |
5306 | (t |
5307 | (apply operation arguments))))) | |
47afc068 | 5308 | \f |
b4da00e9 | 5309 | (define-key ctl-x-map "\C-f" 'find-file) |
b4da00e9 RM |
5310 | (define-key ctl-x-map "\C-r" 'find-file-read-only) |
5311 | (define-key ctl-x-map "\C-v" 'find-alternate-file) | |
5312 | (define-key ctl-x-map "\C-s" 'save-buffer) | |
5313 | (define-key ctl-x-map "s" 'save-some-buffers) | |
5314 | (define-key ctl-x-map "\C-w" 'write-file) | |
5315 | (define-key ctl-x-map "i" 'insert-file) | |
5316 | (define-key esc-map "~" 'not-modified) | |
5317 | (define-key ctl-x-map "\C-d" 'list-directory) | |
5318 | (define-key ctl-x-map "\C-c" 'save-buffers-kill-emacs) | |
d758359d | 5319 | (define-key ctl-x-map "\C-q" 'toggle-read-only) |
b4da00e9 RM |
5320 | |
5321 | (define-key ctl-x-4-map "f" 'find-file-other-window) | |
5322 | (define-key ctl-x-4-map "r" 'find-file-read-only-other-window) | |
5323 | (define-key ctl-x-4-map "\C-f" 'find-file-other-window) | |
5324 | (define-key ctl-x-4-map "b" 'switch-to-buffer-other-window) | |
924f0a24 | 5325 | (define-key ctl-x-4-map "\C-o" 'display-buffer) |
5bbbceb1 | 5326 | |
f98955ea JB |
5327 | (define-key ctl-x-5-map "b" 'switch-to-buffer-other-frame) |
5328 | (define-key ctl-x-5-map "f" 'find-file-other-frame) | |
5329 | (define-key ctl-x-5-map "\C-f" 'find-file-other-frame) | |
5330 | (define-key ctl-x-5-map "r" 'find-file-read-only-other-frame) | |
3095ccf5 | 5331 | (define-key ctl-x-5-map "\C-o" 'display-buffer-other-frame) |
c0274f38 | 5332 | |
c3f6aa20 | 5333 | ;; arch-tag: bc68d3ea-19ca-468b-aac6-3a4a7766101f |
c0274f38 | 5334 | ;;; files.el ends here |