Commit | Line | Data |
---|---|---|
c0274f38 ER |
1 | ;;; files.el --- file input and output commands for Emacs |
2 | ||
e5cb26a8 SM |
3 | ;; Copyright (C) 1985, 1986, 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
4 | ;; 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. | |
b4da00e9 | 5 | |
3a801d0c ER |
6 | ;; Maintainer: FSF |
7 | ||
b4da00e9 RM |
8 | ;; This file is part of GNU Emacs. |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
b4da00e9 RM |
13 | ;; any later version. |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
693f800d | 21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
086add15 LK |
22 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
23 | ;; Boston, MA 02110-1301, USA. | |
b4da00e9 | 24 | |
e41b2db1 ER |
25 | ;;; Commentary: |
26 | ||
27 | ;; Defines most of Emacs's file- and directory-handling functions, | |
28 | ;; including basic file visiting, backup generation, link handling, | |
29 | ;; ITS-id version control, load- and write-hook handling, and the like. | |
30 | ||
e5167999 ER |
31 | ;;; Code: |
32 | ||
21540597 RS |
33 | (defgroup backup nil |
34 | "Backups of edited data files." | |
2a9fe1e2 | 35 | :group 'files) |
b4da00e9 | 36 | |
21540597 | 37 | (defgroup find-file nil |
2a9fe1e2 RS |
38 | "Finding files." |
39 | :group 'files) | |
21540597 RS |
40 | |
41 | ||
42 | (defcustom delete-auto-save-files t | |
92631216 EZ |
43 | "*Non-nil means delete auto-save file when a buffer is saved or killed. |
44 | ||
564af258 | 45 | Note that the auto-save file will not be deleted if the buffer is killed |
92631216 | 46 | when it has unsaved changes." |
21540597 RS |
47 | :type 'boolean |
48 | :group 'auto-save) | |
49 | ||
50 | (defcustom directory-abbrev-alist | |
b4da00e9 RM |
51 | nil |
52 | "*Alist of abbreviations for file directories. | |
53 | A list of elements of the form (FROM . TO), each meaning to replace | |
54 | FROM with TO when it appears in a directory name. This replacement is | |
55 | done when setting up the default directory of a newly visited file. | |
56 | *Every* FROM string should start with `^'. | |
57 | ||
65151a1b RS |
58 | Do not use `~' in the TO strings. |
59 | They should be ordinary absolute directory names. | |
60 | ||
b4da00e9 RM |
61 | Use this feature when you have directories which you normally refer to |
62 | via absolute symbolic links. Make TO the name of the link, and FROM | |
21540597 RS |
63 | the name it is linked to." |
64 | :type '(repeat (cons :format "%v" | |
65 | :value ("" . "") | |
66 | (regexp :tag "From") | |
67 | (regexp :tag "To"))) | |
68 | :group 'abbrev | |
69 | :group 'find-file) | |
b4da00e9 | 70 | |
5c6d31a4 | 71 | ;; Turn off backup files on VMS since it has version numbers. |
21540597 | 72 | (defcustom make-backup-files (not (eq system-type 'vax-vms)) |
4ea836c1 | 73 | "*Non-nil means make a backup of a file the first time it is saved. |
b4da00e9 RM |
74 | This can be done by renaming the file or by copying. |
75 | ||
76 | Renaming means that Emacs renames the existing file so that it is a | |
77 | backup file, then writes the buffer into a new file. Any other names | |
78 | that the old file had will now refer to the backup file. The new file | |
79 | is owned by you and its group is defaulted. | |
80 | ||
81 | Copying means that Emacs copies the existing file into the backup | |
82 | file, then writes the buffer on top of the existing file. Any other | |
83 | names that the old file had will now refer to the new (edited) file. | |
84 | The file's owner and group are unchanged. | |
85 | ||
86 | The choice of renaming or copying is controlled by the variables | |
ffc0e1ca AS |
87 | `backup-by-copying', `backup-by-copying-when-linked', |
88 | `backup-by-copying-when-mismatch' and | |
89 | `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'." | |
21540597 RS |
90 | :type 'boolean |
91 | :group 'backup) | |
b4da00e9 RM |
92 | |
93 | ;; Do this so that local variables based on the file name | |
94 | ;; are not overridden by the major mode. | |
95 | (defvar backup-inhibited nil | |
f862241d RS |
96 | "Non-nil means don't make a backup, regardless of the other parameters. |
97 | This variable is intended for use by making it local to a buffer. | |
98 | But it is local only if you make it local.") | |
b4da00e9 RM |
99 | (put 'backup-inhibited 'permanent-local t) |
100 | ||
21540597 | 101 | (defcustom backup-by-copying nil |
b4da00e9 | 102 | "*Non-nil means always use copying to create backup files. |
21540597 RS |
103 | See documentation of variable `make-backup-files'." |
104 | :type 'boolean | |
105 | :group 'backup) | |
b4da00e9 | 106 | |
21540597 | 107 | (defcustom backup-by-copying-when-linked nil |
b4da00e9 RM |
108 | "*Non-nil means use copying to create backups for files with multiple names. |
109 | This causes the alternate names to refer to the latest version as edited. | |
21540597 RS |
110 | This variable is relevant only if `backup-by-copying' is nil." |
111 | :type 'boolean | |
112 | :group 'backup) | |
b4da00e9 | 113 | |
21540597 | 114 | (defcustom backup-by-copying-when-mismatch nil |
b4da00e9 RM |
115 | "*Non-nil means create backups by copying if this preserves owner or group. |
116 | Renaming may still be used (subject to control of other variables) | |
117 | when it would not result in changing the owner or group of the file; | |
118 | that is, for files which are owned by you and whose group matches | |
119 | the default for a new file created there by you. | |
21540597 RS |
120 | This variable is relevant only if `backup-by-copying' is nil." |
121 | :type 'boolean | |
122 | :group 'backup) | |
b4da00e9 | 123 | |
ffc0e1ca AS |
124 | (defcustom backup-by-copying-when-privileged-mismatch 200 |
125 | "*Non-nil means create backups by copying to preserve a privileged owner. | |
126 | Renaming may still be used (subject to control of other variables) | |
127 | when it would not result in changing the owner of the file or if the owner | |
128 | has a user id greater than the value of this variable. This is useful | |
129 | when low-numbered uid's are used for special system users (such as root) | |
130 | that must maintain ownership of certain files. | |
131 | This variable is relevant only if `backup-by-copying' and | |
132 | `backup-by-copying-when-mismatch' are nil." | |
133 | :type '(choice (const nil) integer) | |
134 | :group 'backup) | |
135 | ||
ffc0e1ca | 136 | (defvar backup-enable-predicate 'normal-backup-enable-predicate |
b4da00e9 | 137 | "Predicate that looks at a file name and decides whether to make backups. |
37193ee6 | 138 | Called with an absolute file name as argument, it returns t to enable backup.") |
b4da00e9 | 139 | |
21540597 | 140 | (defcustom buffer-offer-save nil |
ffc0e1ca AS |
141 | "*Non-nil in a buffer means always offer to save buffer on exit. |
142 | Do so even if the buffer is not visiting a file. | |
21540597 RS |
143 | Automatically local in all buffers." |
144 | :type 'boolean | |
145 | :group 'backup) | |
b4da00e9 RM |
146 | (make-variable-buffer-local 'buffer-offer-save) |
147 | ||
21540597 | 148 | (defcustom find-file-existing-other-name t |
f3e23606 RS |
149 | "*Non-nil means find a file under alternative names, in existing buffers. |
150 | This means if any existing buffer is visiting the file you want | |
21540597 RS |
151 | under another name, you get the existing buffer instead of a new buffer." |
152 | :type 'boolean | |
153 | :group 'find-file) | |
f3e23606 | 154 | |
21540597 | 155 | (defcustom find-file-visit-truename nil |
f3e23606 RS |
156 | "*Non-nil means visit a file under its truename. |
157 | The truename of a file is found by chasing all links | |
21540597 RS |
158 | both at the file level and at the levels of the containing directories." |
159 | :type 'boolean | |
160 | :group 'find-file) | |
f3e23606 | 161 | |
db8c4866 | 162 | (defcustom revert-without-query |
d7fa5aa2 | 163 | nil |
ebeb898f RS |
164 | "*Specify which files should be reverted without query. |
165 | The value is a list of regular expressions. | |
166 | If the file name matches one of these regular expressions, | |
db8c4866 | 167 | then `revert-buffer' reverts the file without querying |
21540597 | 168 | if the file has changed on disk and you have not edited the buffer." |
a0d809f2 | 169 | :type '(repeat regexp) |
21540597 | 170 | :group 'find-file) |
ebeb898f | 171 | |
f3e23606 RS |
172 | (defvar buffer-file-number nil |
173 | "The device number and file number of the file visited in the current buffer. | |
174 | The value is a list of the form (FILENUM DEVNUM). | |
175 | This pair of numbers uniquely identifies the file. | |
176 | If the buffer is visiting a new file, the value is nil.") | |
177 | (make-variable-buffer-local 'buffer-file-number) | |
178 | (put 'buffer-file-number 'permanent-local t) | |
179 | ||
de88363f RS |
180 | (defvar buffer-file-numbers-unique (not (memq system-type '(windows-nt))) |
181 | "Non-nil means that buffer-file-number uniquely identifies files.") | |
182 | ||
e554eeb7 RS |
183 | (defvar buffer-file-read-only nil |
184 | "Non-nil if visited file was read-only when visited.") | |
185 | (make-variable-buffer-local 'buffer-file-read-only) | |
186 | ||
388d6ab5 | 187 | (defcustom temporary-file-directory |
eb61b61b RS |
188 | (file-name-as-directory |
189 | (cond ((memq system-type '(ms-dos windows-nt)) | |
190 | (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp")) | |
191 | ((memq system-type '(vax-vms axp-vms)) | |
192 | (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:")) | |
193 | (t | |
194 | (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp")))) | |
388d6ab5 RS |
195 | "The directory for writing temporary files." |
196 | :group 'files | |
197 | :type 'directory) | |
eb61b61b | 198 | |
388d6ab5 | 199 | (defcustom small-temporary-file-directory |
eb61b61b RS |
200 | (if (eq system-type 'ms-dos) (getenv "TMPDIR")) |
201 | "The directory for writing small temporary files. | |
202 | If non-nil, this directory is used instead of `temporary-file-directory' | |
203 | by programs that create small temporary files. This is for systems that | |
388d6ab5 RS |
204 | have fast storage with limited space, such as a RAM disk." |
205 | :group 'files | |
bab6eadb | 206 | :type '(choice (const nil) directory)) |
eb61b61b RS |
207 | |
208 | ;; The system null device. (Should reference NULL_DEVICE from C.) | |
209 | (defvar null-device "/dev/null" "The system null device.") | |
210 | ||
30966847 EZ |
211 | (defvar file-name-invalid-regexp |
212 | (cond ((and (eq system-type 'ms-dos) (not (msdos-long-file-names))) | |
9959c16e | 213 | (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive |
30966847 | 214 | "[+, ;=|<>\"?*]\\|\\[\\|\\]\\|" ; invalid characters |
edfc7f25 | 215 | "[\000-\031]\\|" ; control characters |
30966847 EZ |
216 | "\\(/\\.\\.?[^/]\\)\\|" ; leading dots |
217 | "\\(/[^/.]+\\.[^/.]*\\.\\)")) ; more than a single dot | |
c60ee5e7 | 218 | ((memq system-type '(ms-dos windows-nt cygwin)) |
9959c16e | 219 | (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive |
106a57a4 | 220 | "[|<>\"?*\000-\031]")) ; invalid characters |
30966847 EZ |
221 | (t "[\000]")) |
222 | "Regexp recognizing file names which aren't allowed by the filesystem.") | |
223 | ||
21540597 | 224 | (defcustom file-precious-flag nil |
b4da00e9 | 225 | "*Non-nil means protect against I/O errors while saving files. |
560f4415 | 226 | Some modes set this non-nil in particular buffers. |
4b7271c1 KH |
227 | |
228 | This feature works by writing the new contents into a temporary file | |
229 | and then renaming the temporary file to replace the original. | |
230 | In this way, any I/O error in writing leaves the original untouched, | |
231 | and there is never any instant where the file is nonexistent. | |
232 | ||
233 | Note that this feature forces backups to be made by copying. | |
560f4415 | 234 | Yet, at the same time, saving a precious file |
21540597 RS |
235 | breaks any hard links between it and other files." |
236 | :type 'boolean | |
237 | :group 'backup) | |
b4da00e9 | 238 | |
21540597 | 239 | (defcustom version-control nil |
b4da00e9 RM |
240 | "*Control use of version numbers for backup files. |
241 | t means make numeric backup versions unconditionally. | |
242 | nil means make them for files that have some already. | |
21540597 | 243 | `never' means do not make them." |
e48807d1 AS |
244 | :type '(choice (const :tag "Never" never) |
245 | (const :tag "If existing" nil) | |
246 | (other :tag "Always" t)) | |
21540597 RS |
247 | :group 'backup |
248 | :group 'vc) | |
249 | ||
250 | (defcustom dired-kept-versions 2 | |
251 | "*When cleaning directory, number of versions to keep." | |
252 | :type 'integer | |
253 | :group 'backup | |
254 | :group 'dired) | |
255 | ||
256 | (defcustom delete-old-versions nil | |
de7d5e1b | 257 | "*If t, delete excess backup versions silently. |
21540597 RS |
258 | If nil, ask confirmation. Any other value prevents any trimming." |
259 | :type '(choice (const :tag "Delete" t) | |
260 | (const :tag "Ask" nil) | |
e48807d1 | 261 | (other :tag "Leave" other)) |
21540597 RS |
262 | :group 'backup) |
263 | ||
264 | (defcustom kept-old-versions 2 | |
265 | "*Number of oldest versions to keep when a new numbered backup is made." | |
266 | :type 'integer | |
267 | :group 'backup) | |
268 | ||
269 | (defcustom kept-new-versions 2 | |
b4da00e9 | 270 | "*Number of newest versions to keep when a new numbered backup is made. |
21540597 RS |
271 | Includes the new backup. Must be > 0" |
272 | :type 'integer | |
273 | :group 'backup) | |
b4da00e9 | 274 | |
21540597 | 275 | (defcustom require-final-newline nil |
f4206092 RS |
276 | "*Whether to add a newline automatically at the end of the file. |
277 | ||
278 | A value of t means do this only when the file is about to be saved. | |
279 | A value of `visit' means do this right after the file is visited. | |
280 | A value of `visit-save' means do it at both of those times. | |
281 | Any other non-nil value means ask user whether to add a newline, when saving. | |
282 | nil means don't add newlines. | |
283 | ||
284 | Certain major modes set this locally to the value obtained | |
285 | from `mode-require-final-newline'." | |
286 | :type '(choice (const :tag "When visiting" visit) | |
287 | (const :tag "When saving" t) | |
288 | (const :tag "When visiting or saving" visit-save) | |
93d1963d | 289 | (const :tag "Don't add newlines" nil) |
0776da52 | 290 | (other :tag "Ask each time" ask)) |
21540597 | 291 | :group 'editing-basics) |
b4da00e9 | 292 | |
f4206092 | 293 | (defcustom mode-require-final-newline t |
5e9961be | 294 | "*Whether to add a newline at end of file, in certain major modes. |
f4206092 | 295 | Those modes set `require-final-newline' to this value when you enable them. |
0776da52 | 296 | They do so because they are often used for files that are supposed |
f4206092 RS |
297 | to end in newlines, and the question is how to arrange that. |
298 | ||
299 | A value of t means do this only when the file is about to be saved. | |
300 | A value of `visit' means do this right after the file is visited. | |
301 | A value of `visit-save' means do it at both of those times. | |
5e9961be | 302 | Any other non-nil value means ask user whether to add a newline, when saving. |
5e9961be | 303 | |
93d1963d RS |
304 | nil means do not add newlines. That is a risky choice in this variable |
305 | since this value is used for modes for files that ought to have final newlines. | |
306 | So if you set this to nil, you must explicitly check and add | |
307 | a final newline, whenever you save a file that really needs one." | |
f4206092 RS |
308 | :type '(choice (const :tag "When visiting" visit) |
309 | (const :tag "When saving" t) | |
310 | (const :tag "When visiting or saving" visit-save) | |
93d1963d RS |
311 | (const :tag "Don't add newlines" nil) |
312 | (other :tag "Ask each time" ask)) | |
f4206092 | 313 | :group 'editing-basics |
bf247b6e | 314 | :version "22.1") |
f4206092 | 315 | |
21540597 RS |
316 | (defcustom auto-save-default t |
317 | "*Non-nil says by default do auto-saving of every file-visiting buffer." | |
318 | :type 'boolean | |
319 | :group 'auto-save) | |
b4da00e9 | 320 | |
21540597 | 321 | (defcustom auto-save-visited-file-name nil |
b4da00e9 | 322 | "*Non-nil says auto-save a buffer in the file it is visiting, when practical. |
21540597 RS |
323 | Normally auto-save files are written under other names." |
324 | :type 'boolean | |
325 | :group 'auto-save) | |
b4da00e9 | 326 | |
ffc0e1ca | 327 | (defcustom auto-save-file-name-transforms |
b1e5937c | 328 | `(("\\`/[^/]*:\\([^/]*/\\)*\\([^/]*\\)\\'" |
747981b0 EZ |
329 | ;; Don't put "\\2" inside expand-file-name, since it will be |
330 | ;; transformed to "/2" on DOS/Windows. | |
a0b60c33 | 331 | ,(concat temporary-file-directory "\\2") t)) |
ffc0e1ca | 332 | "*Transforms to apply to buffer file name before making auto-save file name. |
a0b60c33 | 333 | Each transform is a list (REGEXP REPLACEMENT UNIQUIFY): |
ffc0e1ca AS |
334 | REGEXP is a regular expression to match against the file name. |
335 | If it matches, `replace-match' is used to replace the | |
336 | matching part with REPLACEMENT. | |
a0b60c33 | 337 | If the optional element UNIQUIFY is non-nil, the auto-save file name is |
36236b72 | 338 | constructed by taking the directory part of the replaced file-name, |
a0b60c33 GM |
339 | concatenated with the buffer file name with all directory separators |
340 | changed to `!' to prevent clashes. This will not work | |
341 | correctly if your filesystem truncates the resulting name. | |
342 | ||
ffc0e1ca AS |
343 | All the transforms in the list are tried, in the order they are listed. |
344 | When one transform applies, its result is final; | |
345 | no further transforms are tried. | |
346 | ||
a2899d6c KG |
347 | The default value is set up to put the auto-save file into the |
348 | temporary directory (see the variable `temporary-file-directory') for | |
a0b60c33 GM |
349 | editing a remote file. |
350 | ||
351 | On MS-DOS filesystems without long names this variable is always | |
352 | ignored." | |
ffc0e1ca | 353 | :group 'auto-save |
a0b60c33 GM |
354 | :type '(repeat (list (string :tag "Regexp") (string :tag "Replacement") |
355 | (boolean :tag "Uniquify"))) | |
ffc0e1ca AS |
356 | :version "21.1") |
357 | ||
88b36776 | 358 | (defcustom save-abbrevs t |
02c6a1cc EZ |
359 | "*Non-nil means save word abbrevs too when files are saved. |
360 | If `silently', don't ask the user before saving." | |
361 | :type '(choice (const t) (const nil) (const silently)) | |
21540597 | 362 | :group 'abbrev) |
b4da00e9 | 363 | |
21540597 | 364 | (defcustom find-file-run-dired t |
ffc0e1ca AS |
365 | "*Non-nil means allow `find-file' to visit directories. |
366 | To visit the directory, `find-file' runs `find-directory-functions'." | |
21540597 RS |
367 | :type 'boolean |
368 | :group 'find-file) | |
b4da00e9 | 369 | |
ffc0e1ca AS |
370 | (defcustom find-directory-functions '(cvs-dired-noselect dired-noselect) |
371 | "*List of functions to try in sequence to visit a directory. | |
372 | Each function is called with the directory name as the sole argument | |
373 | and should return either a buffer or nil." | |
374 | :type '(hook :options (cvs-dired-noselect dired-noselect)) | |
375 | :group 'find-file) | |
376 | ||
92966e6f RS |
377 | ;;;It is not useful to make this a local variable. |
378 | ;;;(put 'find-file-not-found-hooks 'permanent-local t) | |
0370fe77 | 379 | (defvar find-file-not-found-functions nil |
b4da00e9 RM |
380 | "List of functions to be called for `find-file' on nonexistent file. |
381 | These functions are called as soon as the error is detected. | |
ffc0e1ca | 382 | Variable `buffer-file-name' is already set up. |
b4da00e9 | 383 | The functions are called in the order given until one of them returns non-nil.") |
0370fe77 SM |
384 | (defvaralias 'find-file-not-found-hooks 'find-file-not-found-functions) |
385 | (make-obsolete-variable | |
bf247b6e | 386 | 'find-file-not-found-hooks 'find-file-not-found-functions "22.1") |
b4da00e9 | 387 | |
92966e6f RS |
388 | ;;;It is not useful to make this a local variable. |
389 | ;;;(put 'find-file-hooks 'permanent-local t) | |
564af258 | 390 | (defcustom find-file-hook nil |
b4da00e9 RM |
391 | "List of functions to be called after a buffer is loaded from a file. |
392 | The buffer's local variables (if any) will have been processed before the | |
564af258 DL |
393 | functions are called." |
394 | :group 'find-file | |
395 | :type 'hook | |
396 | :options '(auto-insert) | |
bf247b6e | 397 | :version "22.1") |
0370fe77 | 398 | (defvaralias 'find-file-hooks 'find-file-hook) |
bf247b6e | 399 | (make-obsolete-variable 'find-file-hooks 'find-file-hook "22.1") |
b4da00e9 | 400 | |
0370fe77 | 401 | (defvar write-file-functions nil |
b4da00e9 RM |
402 | "List of functions to be called before writing out a buffer to a file. |
403 | If one of them returns non-nil, the file is considered already written | |
8c0e7b73 JB |
404 | and the rest are not called. |
405 | These hooks are considered to pertain to the visited file. | |
0370fe77 SM |
406 | So any buffer-local binding of this variable is discarded if you change |
407 | the visited file name with \\[set-visited-file-name], but not when you | |
408 | change the major mode. | |
409 | ||
0eb0202f LT |
410 | This hook is not run if any of the functions in |
411 | `write-contents-functions' returns non-nil. Both hooks pertain | |
412 | to how to save a buffer to file, for instance, choosing a suitable | |
413 | coding system and setting mode bits. (See Info | |
414 | node `(elisp)Saving Buffers'.) To perform various checks or | |
415 | updates before the buffer is saved, use `before-save-hook' .") | |
0370fe77 SM |
416 | (put 'write-file-functions 'permanent-local t) |
417 | (defvaralias 'write-file-hooks 'write-file-functions) | |
bf247b6e | 418 | (make-obsolete-variable 'write-file-hooks 'write-file-functions "22.1") |
0370fe77 SM |
419 | |
420 | (defvar local-write-file-hooks nil) | |
b19f1da4 BF |
421 | (make-variable-buffer-local 'local-write-file-hooks) |
422 | (put 'local-write-file-hooks 'permanent-local t) | |
bf247b6e | 423 | (make-obsolete-variable 'local-write-file-hooks 'write-file-functions "22.1") |
8c0e7b73 | 424 | |
0370fe77 | 425 | (defvar write-contents-functions nil |
8c0e7b73 JB |
426 | "List of functions to be called before writing out a buffer to a file. |
427 | If one of them returns non-nil, the file is considered already written | |
7dd11b37 LH |
428 | and the rest are not called and neither are the functions in |
429 | `write-file-functions'. | |
f82966e4 KH |
430 | |
431 | This variable is meant to be used for hooks that pertain to the | |
432 | buffer's contents, not to the particular visited file; thus, | |
433 | `set-visited-file-name' does not clear this variable; but changing the | |
693f800d RS |
434 | major mode does clear it. |
435 | ||
0eb0202f LT |
436 | For hooks that _do_ pertain to the particular visited file, use |
437 | `write-file-functions'. Both this variable and | |
438 | `write-file-functions' relate to how a buffer is saved to file. | |
439 | To perform various checks or updates before the buffer is saved, | |
440 | use `before-save-hook'.") | |
0370fe77 SM |
441 | (make-variable-buffer-local 'write-contents-functions) |
442 | (defvaralias 'write-contents-hooks 'write-contents-functions) | |
bf247b6e | 443 | (make-obsolete-variable 'write-contents-hooks 'write-contents-functions "22.1") |
b4da00e9 | 444 | |
21540597 | 445 | (defcustom enable-local-variables t |
93a2702d | 446 | "*Control use of local variables in files you visit. |
b4da00e9 | 447 | The value can be t, nil or something else. |
93a2702d | 448 | A value of t means file local variables specifications are obeyed; |
b4da00e9 | 449 | nil means they are ignored; anything else means query. |
aa5fcebf KH |
450 | This variable also controls use of major modes specified in |
451 | a -*- line. | |
b4da00e9 | 452 | |
aa5fcebf KH |
453 | The command \\[normal-mode], when used interactively, |
454 | always obeys file local variable specifications and the -*- line, | |
455 | and ignores this variable." | |
21540597 RS |
456 | :type '(choice (const :tag "Obey" t) |
457 | (const :tag "Ignore" nil) | |
e48807d1 | 458 | (other :tag "Query" other)) |
21540597 | 459 | :group 'find-file) |
b4da00e9 | 460 | |
da09b92b RS |
461 | (defvar local-enable-local-variables t |
462 | "Like `enable-local-variables' but meant for buffer-local bindings. | |
aa5fcebf | 463 | The meaningful values are nil and non-nil. The default is non-nil. |
da09b92b | 464 | If a major mode sets this to nil, buffer-locally, then any local |
aa5fcebf KH |
465 | variables list in the file will be ignored. |
466 | ||
467 | This variable does not affect the use of major modes | |
468 | specified in a -*- line.") | |
da09b92b | 469 | |
21540597 | 470 | (defcustom enable-local-eval 'maybe |
d207b766 RS |
471 | "*Control processing of the \"variable\" `eval' in a file's local variables. |
472 | The value can be t, nil or something else. | |
473 | A value of t means obey `eval' variables; | |
e0b2a2d9 | 474 | nil means ignore them; anything else means query." |
21540597 RS |
475 | :type '(choice (const :tag "Obey" t) |
476 | (const :tag "Ignore" nil) | |
e48807d1 | 477 | (other :tag "Query" other)) |
21540597 | 478 | :group 'find-file) |
b4da00e9 RM |
479 | |
480 | ;; Avoid losing in versions where CLASH_DETECTION is disabled. | |
481 | (or (fboundp 'lock-buffer) | |
231c4e10 | 482 | (defalias 'lock-buffer 'ignore)) |
b4da00e9 | 483 | (or (fboundp 'unlock-buffer) |
231c4e10 | 484 | (defalias 'unlock-buffer 'ignore)) |
a7305f6e RS |
485 | (or (fboundp 'file-locked-p) |
486 | (defalias 'file-locked-p 'ignore)) | |
93fe0a35 | 487 | |
cb211eb2 | 488 | (defcustom view-read-only nil |
4c91443d RS |
489 | "*Non-nil means buffers visiting files read-only do so in view mode. |
490 | In fact, this means that all read-only buffers normally have | |
491 | View mode enabled, including buffers that are read-only because | |
492 | you visit a file you cannot alter, and buffers you make read-only | |
493 | using \\[toggle-read-only]." | |
cb211eb2 SM |
494 | :type 'boolean |
495 | :group 'view) | |
2a9fe1e2 | 496 | |
1aa8fe46 | 497 | (put 'ange-ftp-completion-hook-function 'safe-magic t) |
93fe0a35 | 498 | (defun ange-ftp-completion-hook-function (op &rest args) |
ffc0e1ca AS |
499 | "Provides support for ange-ftp host name completion. |
500 | Runs the usual ange-ftp hook, but only for completion operations." | |
501 | ;; Having this here avoids the need to load ange-ftp when it's not | |
502 | ;; really in use. | |
93fe0a35 RS |
503 | (if (memq op '(file-name-completion file-name-all-completions)) |
504 | (apply 'ange-ftp-hook-function op args) | |
57e81f57 RS |
505 | (let ((inhibit-file-name-handlers |
506 | (cons 'ange-ftp-completion-hook-function | |
507 | (and (eq inhibit-file-name-operation op) | |
508 | inhibit-file-name-handlers))) | |
509 | (inhibit-file-name-operation op)) | |
93fe0a35 | 510 | (apply op args)))) |
567c1ca9 RS |
511 | |
512 | (defun convert-standard-filename (filename) | |
a576d8e2 | 513 | "Convert a standard file's name to something suitable for the OS. |
915b0bf0 JB |
514 | This means to guarantee valid names and perhaps to canonicalize |
515 | certain patterns. | |
516 | ||
f2430a0d SM |
517 | FILENAME should be an absolute file name since the conversion rules |
518 | sometimes vary depending on the position in the file name. E.g. c:/foo | |
519 | is a valid DOS file name, but c:/bar/c:/foo is not. | |
520 | ||
915b0bf0 JB |
521 | This function's standard definition is trivial; it just returns |
522 | the argument. However, on Windows and DOS, replace invalid | |
523 | characters. On DOS, make sure to obey the 8.3 limitations. On | |
524 | Windows, turn Cygwin names into native names, and also turn | |
525 | slashes into backslashes if the shell requires it (see | |
a576d8e2 LT |
526 | `w32-shell-dos-semantics'). |
527 | ||
528 | See Info node `(elisp)Standard File Names' for more details." | |
567c1ca9 | 529 | filename) |
5d4d17b8 KS |
530 | |
531 | (defun read-directory-name (prompt &optional dir default-dirname mustmatch initial) | |
532 | "Read directory name, prompting with PROMPT and completing in directory DIR. | |
533 | Value is not expanded---you must call `expand-file-name' yourself. | |
25802eac LT |
534 | Default name to DEFAULT-DIRNAME if user exits with the same |
535 | non-empty string that was inserted by this function. | |
44dce0fb RS |
536 | (If DEFAULT-DIRNAME is omitted, DIR combined with INITIAL is used, |
537 | or just DIR if INITIAL is nil.) | |
25802eac LT |
538 | If the user exits with an empty minibuffer, this function returns |
539 | an empty string. (This can only happen if the user erased the | |
540 | pre-inserted contents or if `insert-default-directory' is nil.) | |
5d4d17b8 KS |
541 | Fourth arg MUSTMATCH non-nil means require existing directory's name. |
542 | Non-nil and non-t means also require confirmation after completion. | |
543 | Fifth arg INITIAL specifies text to start with. | |
25802eac LT |
544 | DIR should be an absolute directory name. It defaults to |
545 | the value of `default-directory'." | |
5d4d17b8 KS |
546 | (unless dir |
547 | (setq dir default-directory)) | |
54005870 | 548 | (read-file-name prompt dir (or default-dirname |
44dce0fb RS |
549 | (if initial (expand-file-name initial dir) |
550 | dir)) | |
551 | mustmatch initial | |
5d4d17b8 KS |
552 | 'file-directory-p)) |
553 | ||
b4da00e9 RM |
554 | \f |
555 | (defun pwd () | |
556 | "Show the current default directory." | |
557 | (interactive nil) | |
558 | (message "Directory %s" default-directory)) | |
559 | ||
231c4e10 ER |
560 | (defvar cd-path nil |
561 | "Value of the CDPATH environment variable, as a list. | |
9ee45b2c | 562 | Not actually set up until the first time you use it.") |
231c4e10 ER |
563 | |
564 | (defun parse-colon-path (cd-path) | |
ae135939 | 565 | "Explode a search path into a list of directory names. |
c5994cfa JB |
566 | Directories are separated by occurrences of `path-separator' |
567 | \(which is colon in GNU and GNU-like systems)." | |
ffc0e1ca | 568 | ;; We could use split-string here. |
231c4e10 | 569 | (and cd-path |
818286f4 | 570 | (let (cd-list (cd-start 0) cd-colon) |
306faa42 RS |
571 | (setq cd-path (concat cd-path path-separator)) |
572 | (while (setq cd-colon (string-match path-separator cd-path cd-start)) | |
231c4e10 | 573 | (setq cd-list |
9daefb36 | 574 | (nconc cd-list |
c52e4104 RS |
575 | (list (if (= cd-start cd-colon) |
576 | nil | |
577 | (substitute-in-file-name | |
e33e80e4 RS |
578 | (file-name-as-directory |
579 | (substring cd-path cd-start cd-colon))))))) | |
231c4e10 ER |
580 | (setq cd-start (+ cd-colon 1))) |
581 | cd-list))) | |
582 | ||
583 | (defun cd-absolute (dir) | |
30c5ce9c | 584 | "Change current directory to given absolute file name DIR." |
f4a0f59b RS |
585 | ;; Put the name into directory syntax now, |
586 | ;; because otherwise expand-file-name may give some bad results. | |
b4da00e9 RM |
587 | (if (not (eq system-type 'vax-vms)) |
588 | (setq dir (file-name-as-directory dir))) | |
f4a0f59b | 589 | (setq dir (abbreviate-file-name (expand-file-name dir))) |
b4da00e9 | 590 | (if (not (file-directory-p dir)) |
83c6f446 RS |
591 | (if (file-exists-p dir) |
592 | (error "%s is not a directory" dir) | |
31c691c1 | 593 | (error "%s: no such directory" dir)) |
b4da00e9 RM |
594 | (if (file-executable-p dir) |
595 | (setq default-directory dir) | |
9daefb36 | 596 | (error "Cannot cd to %s: Permission denied" dir)))) |
b4da00e9 | 597 | |
231c4e10 ER |
598 | (defun cd (dir) |
599 | "Make DIR become the current buffer's default directory. | |
ae135939 JB |
600 | If your environment includes a `CDPATH' variable, try each one of |
601 | that list of directories (separated by occurrences of | |
c5994cfa JB |
602 | `path-separator') when resolving a relative directory name. |
603 | The path separator is colon in GNU and GNU-like systems." | |
dac4ea74 | 604 | (interactive |
5d4d17b8 | 605 | (list (read-directory-name "Change default directory: " |
2121cd9c RM |
606 | default-directory default-directory |
607 | (and (member cd-path '(nil ("./"))) | |
608 | (null (getenv "CDPATH")))))) | |
30c5ce9c RS |
609 | (if (file-name-absolute-p dir) |
610 | (cd-absolute (expand-file-name dir)) | |
611 | (if (null cd-path) | |
612 | (let ((trypath (parse-colon-path (getenv "CDPATH")))) | |
613 | (setq cd-path (or trypath (list "./"))))) | |
614 | (if (not (catch 'found | |
615 | (mapcar | |
616 | (function (lambda (x) | |
617 | (let ((f (expand-file-name (concat x dir)))) | |
618 | (if (file-directory-p f) | |
619 | (progn | |
620 | (cd-absolute f) | |
621 | (throw 'found t)))))) | |
622 | cd-path) | |
623 | nil)) | |
624 | (error "No such directory found via CDPATH environment variable")))) | |
231c4e10 | 625 | |
b4da00e9 RM |
626 | (defun load-file (file) |
627 | "Load the Lisp file named FILE." | |
58195faa DL |
628 | ;; This is a case where .elc makes a lot of sense. |
629 | (interactive (list (let ((completion-ignored-extensions | |
9ab80679 | 630 | (remove ".elc" completion-ignored-extensions))) |
58195faa DL |
631 | (read-file-name "Load file: ")))) |
632 | (load (expand-file-name file) nil nil t)) | |
b4da00e9 | 633 | |
38eea7c7 SM |
634 | (defun locate-file (filename path &optional suffixes predicate) |
635 | "Search for FILENAME through PATH. | |
c7c4bc11 EZ |
636 | If found, return the absolute file name of FILENAME, with its suffixes; |
637 | otherwise return nil. | |
638 | PATH should be a list of directories to look in, like the lists in | |
639 | `exec-path' or `load-path'. | |
38eea7c7 SM |
640 | If SUFFIXES is non-nil, it should be a list of suffixes to append to |
641 | file name when searching. If SUFFIXES is nil, it is equivalent to '(\"\"). | |
c7c4bc11 | 642 | Use '(\"/\") to disable PATH search, but still try the suffixes in SUFFIXES. |
38eea7c7 | 643 | If non-nil, PREDICATE is used instead of `file-readable-p'. |
e6f0ff92 RS |
644 | PREDICATE can also be an integer to pass to the `access' system call, |
645 | in which case file-name handlers are ignored. This usage is deprecated. | |
646 | ||
647 | For compatibility, PREDICATE can also be one of the symbols | |
648 | `executable', `readable', `writable', or `exists', or a list of | |
649 | one or more of those symbols." | |
38eea7c7 SM |
650 | (if (and predicate (symbolp predicate) (not (functionp predicate))) |
651 | (setq predicate (list predicate))) | |
652 | (when (and (consp predicate) (not (functionp predicate))) | |
653 | (setq predicate | |
654 | (logior (if (memq 'executable predicate) 1 0) | |
655 | (if (memq 'writable predicate) 2 0) | |
656 | (if (memq 'readable predicate) 4 0)))) | |
657 | (locate-file-internal filename path suffixes predicate)) | |
658 | ||
659 | (defun locate-file-completion (string path-and-suffixes action) | |
660 | "Do completion for file names passed to `locate-file'. | |
e6ca43c8 | 661 | PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)." |
2c3d8820 | 662 | (if (file-name-absolute-p string) |
38eea7c7 | 663 | (read-file-name-internal string nil action) |
2c3d8820 | 664 | (let ((names nil) |
38eea7c7 | 665 | (suffix (concat (regexp-opt (cdr path-and-suffixes) t) "\\'")) |
2c3d8820 | 666 | (string-dir (file-name-directory string))) |
38eea7c7 | 667 | (dolist (dir (car path-and-suffixes)) |
f2440e42 RS |
668 | (unless dir |
669 | (setq dir default-directory)) | |
2c3d8820 SM |
670 | (if string-dir (setq dir (expand-file-name string-dir dir))) |
671 | (when (file-directory-p dir) | |
672 | (dolist (file (file-name-all-completions | |
673 | (file-name-nondirectory string) dir)) | |
674 | (push (if string-dir (concat string-dir file) file) names) | |
675 | (when (string-match suffix file) | |
676 | (setq file (substring file 0 (match-beginning 0))) | |
677 | (push (if string-dir (concat string-dir file) file) names))))) | |
0370fe77 SM |
678 | (cond |
679 | ((eq action t) (all-completions string names)) | |
680 | ((null action) (try-completion string names)) | |
681 | (t (test-completion string names)))))) | |
2c3d8820 | 682 | |
c3f6aa20 SM |
683 | (defun executable-find (command) |
684 | "Search for COMMAND in `exec-path' and return the absolute file name. | |
685 | Return nil if COMMAND is not found anywhere in `exec-path'." | |
686 | ;; Use 1 rather than file-executable-p to better match the behavior of | |
687 | ;; call-process. | |
688 | (locate-file command exec-path exec-suffixes 1)) | |
689 | ||
b4da00e9 RM |
690 | (defun load-library (library) |
691 | "Load the library named LIBRARY. | |
692 | This is an interface to the function `load'." | |
38eea7c7 SM |
693 | (interactive |
694 | (list (completing-read "Load library: " | |
695 | 'locate-file-completion | |
696 | (cons load-path load-suffixes)))) | |
b4da00e9 | 697 | (load library)) |
5d68c2c2 | 698 | |
ff7affeb | 699 | (defun file-remote-p (file) |
3f788773 KG |
700 | "Test whether FILE specifies a location on a remote system. |
701 | Return an identification of the system if the location is indeed | |
702 | remote. The identification of the system may comprise a method | |
703 | to access the system and its hostname, amongst other things. | |
704 | ||
705 | For example, the filename \"/user@host:/foo\" specifies a location | |
706 | on the system \"/user@host:\"." | |
04621aaa | 707 | (let ((handler (find-file-name-handler file 'file-remote-p))) |
ff7affeb | 708 | (if handler |
04621aaa MA |
709 | (funcall handler 'file-remote-p file) |
710 | nil))) | |
ff7affeb | 711 | |
ffc0e1ca | 712 | (defun file-local-copy (file) |
5d68c2c2 RS |
713 | "Copy the file FILE into a temporary file on this machine. |
714 | Returns the name of the local copy, or nil, if FILE is directly | |
715 | accessible." | |
ffc0e1ca AS |
716 | ;; This formerly had an optional BUFFER argument that wasn't used by |
717 | ;; anything. | |
6eaebaa2 | 718 | (let ((handler (find-file-name-handler file 'file-local-copy))) |
5d68c2c2 RS |
719 | (if handler |
720 | (funcall handler 'file-local-copy file) | |
721 | nil))) | |
f3e23606 | 722 | |
05ef1cda | 723 | (defun file-truename (filename &optional counter prev-dirs) |
f3e23606 RS |
724 | "Return the truename of FILENAME, which should be absolute. |
725 | The truename of a file name is found by chasing symbolic links | |
726 | both at the level of the file and at the level of the directories | |
05ef1cda RS |
727 | containing it, until no links are left at any level. |
728 | ||
89bf74f8 | 729 | \(fn FILENAME)" ;; Don't document the optional arguments. |
b9963e32 JB |
730 | ;; COUNTER and PREV-DIRS are only used in recursive calls. |
731 | ;; COUNTER can be a cons cell whose car is the count of how many | |
732 | ;; more links to chase before getting an error. | |
05ef1cda RS |
733 | ;; PREV-DIRS can be a cons cell whose car is an alist |
734 | ;; of truenames we've just recently computed. | |
f2440e42 RS |
735 | (cond ((or (string= filename "") (string= filename "~")) |
736 | (setq filename (expand-file-name filename)) | |
737 | (if (string= filename "") | |
738 | (setq filename "/"))) | |
739 | ((and (string= (substring filename 0 1) "~") | |
740 | (string-match "~[^/]*/?" filename)) | |
741 | (let ((first-part | |
742 | (substring filename 0 (match-end 0))) | |
743 | (rest (substring filename (match-end 0)))) | |
744 | (setq filename (concat (expand-file-name first-part) rest))))) | |
745 | ||
05ef1cda | 746 | (or counter (setq counter (list 100))) |
b505828b RS |
747 | (let (done |
748 | ;; For speed, remove the ange-ftp completion handler from the list. | |
749 | ;; We know it's not needed here. | |
750 | ;; For even more speed, do this only on the outermost call. | |
751 | (file-name-handler-alist | |
752 | (if prev-dirs file-name-handler-alist | |
753 | (let ((tem (copy-sequence file-name-handler-alist))) | |
754 | (delq (rassq 'ange-ftp-completion-hook-function tem) tem))))) | |
755 | (or prev-dirs (setq prev-dirs (list nil))) | |
b1667e6c GV |
756 | |
757 | ;; andrewi@harlequin.co.uk - none of the following code (except for | |
758 | ;; invoking the file-name handler) currently applies on Windows | |
759 | ;; (ie. there are no native symlinks), but there is an issue with | |
760 | ;; case differences being ignored by the OS, and short "8.3 DOS" | |
761 | ;; name aliases existing for all files. (The short names are not | |
762 | ;; reported by directory-files, but can be used to refer to files.) | |
763 | ;; It seems appropriate for file-truename to resolve these issues in | |
764 | ;; the most natural way, which on Windows is to call the function | |
765 | ;; `w32-long-file-name' - this returns the exact name of a file as | |
766 | ;; it is stored on disk (expanding short name aliases with the full | |
767 | ;; name in the process). | |
768 | (if (eq system-type 'windows-nt) | |
06dd5ef7 | 769 | (let ((handler (find-file-name-handler filename 'file-truename))) |
b1667e6c GV |
770 | ;; For file name that has a special handler, call handler. |
771 | ;; This is so that ange-ftp can save time by doing a no-op. | |
772 | (if handler | |
773 | (setq filename (funcall handler 'file-truename filename)) | |
774 | ;; If filename contains a wildcard, newname will be the old name. | |
06dd5ef7 | 775 | (unless (string-match "[[*?]" filename) |
5b373bd3 JB |
776 | ;; If filename exists, use the long name |
777 | (setq filename (or (w32-long-file-name filename) filename)))) | |
b1667e6c GV |
778 | (setq done t))) |
779 | ||
05ef1cda RS |
780 | ;; If this file directly leads to a link, process that iteratively |
781 | ;; so that we don't use lots of stack. | |
782 | (while (not done) | |
783 | (setcar counter (1- (car counter))) | |
784 | (if (< (car counter) 0) | |
785 | (error "Apparent cycle of symbolic links for %s" filename)) | |
786 | (let ((handler (find-file-name-handler filename 'file-truename))) | |
787 | ;; For file name that has a special handler, call handler. | |
788 | ;; This is so that ange-ftp can save time by doing a no-op. | |
789 | (if handler | |
790 | (setq filename (funcall handler 'file-truename filename) | |
791 | done t) | |
fb145562 | 792 | (let ((dir (or (file-name-directory filename) default-directory)) |
05ef1cda RS |
793 | target dirfile) |
794 | ;; Get the truename of the directory. | |
795 | (setq dirfile (directory-file-name dir)) | |
796 | ;; If these are equal, we have the (or a) root directory. | |
797 | (or (string= dir dirfile) | |
798 | ;; If this is the same dir we last got the truename for, | |
799 | ;; save time--don't recalculate. | |
800 | (if (assoc dir (car prev-dirs)) | |
801 | (setq dir (cdr (assoc dir (car prev-dirs)))) | |
802 | (let ((old dir) | |
803 | (new (file-name-as-directory (file-truename dirfile counter prev-dirs)))) | |
804 | (setcar prev-dirs (cons (cons old new) (car prev-dirs))) | |
805 | (setq dir new)))) | |
806 | (if (equal ".." (file-name-nondirectory filename)) | |
807 | (setq filename | |
808 | (directory-file-name (file-name-directory (directory-file-name dir))) | |
809 | done t) | |
810 | (if (equal "." (file-name-nondirectory filename)) | |
811 | (setq filename (directory-file-name dir) | |
812 | done t) | |
813 | ;; Put it back on the file name. | |
814 | (setq filename (concat dir (file-name-nondirectory filename))) | |
815 | ;; Is the file name the name of a link? | |
816 | (setq target (file-symlink-p filename)) | |
817 | (if target | |
818 | ;; Yes => chase that link, then start all over | |
819 | ;; since the link may point to a directory name that uses links. | |
820 | ;; We can't safely use expand-file-name here | |
821 | ;; since target might look like foo/../bar where foo | |
822 | ;; is itself a link. Instead, we handle . and .. above. | |
823 | (setq filename | |
824 | (if (file-name-absolute-p target) | |
825 | target | |
826 | (concat dir target)) | |
827 | done nil) | |
828 | ;; No, we are done! | |
829 | (setq done t)))))))) | |
830 | filename)) | |
5dbfdacd | 831 | |
302fcc98 | 832 | (defun file-chase-links (filename &optional limit) |
5dadeb29 | 833 | "Chase links in FILENAME until a name that is not a link. |
302fcc98 RS |
834 | Unlike `file-truename', this does not check whether a parent |
835 | directory name is a symbolic link. | |
836 | If the optional argument LIMIT is a number, | |
837 | it means chase no more than that many links and then stop." | |
838 | (let (tem (newname filename) | |
92464ae6 | 839 | (count 0)) |
302fcc98 RS |
840 | (while (and (or (null limit) (< count limit)) |
841 | (setq tem (file-symlink-p newname))) | |
9695aac6 | 842 | (save-match-data |
92464ae6 | 843 | (if (and (null limit) (= count 100)) |
9695aac6 RS |
844 | (error "Apparent cycle of symbolic links for %s" filename)) |
845 | ;; In the context of a link, `//' doesn't mean what Emacs thinks. | |
846 | (while (string-match "//+" tem) | |
847 | (setq tem (replace-match "/" nil nil tem))) | |
848 | ;; Handle `..' by hand, since it needs to work in the | |
849 | ;; target of any directory symlink. | |
850 | ;; This code is not quite complete; it does not handle | |
851 | ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose. | |
852 | (while (string-match "\\`\\.\\./" tem) | |
853 | (setq tem (substring tem 3)) | |
854 | (setq newname (expand-file-name newname)) | |
855 | ;; Chase links in the default dir of the symlink. | |
856 | (setq newname | |
857 | (file-chase-links | |
858 | (directory-file-name (file-name-directory newname)))) | |
859 | ;; Now find the parent of that dir. | |
860 | (setq newname (file-name-directory newname))) | |
861 | (setq newname (expand-file-name tem (file-name-directory newname))) | |
92464ae6 | 862 | (setq count (1+ count)))) |
5dadeb29 | 863 | newname)) |
9bdbd98e KH |
864 | |
865 | (defun recode-file-name (file coding new-coding &optional ok-if-already-exists) | |
866 | "Change the encoding of FILE's name from CODING to NEW-CODING. | |
867 | The value is a new name of FILE. | |
868 | Signals a `file-already-exists' error if a file of the new name | |
869 | already exists unless optional third argument OK-IF-ALREADY-EXISTS | |
870 | is non-nil. A number as third arg means request confirmation if | |
871 | the new name already exists. This is what happens in interactive | |
872 | use with M-x." | |
873 | (interactive | |
874 | (let ((default-coding (or file-name-coding-system | |
875 | default-file-name-coding-system)) | |
876 | (filename (read-file-name "Recode filename: " nil nil t)) | |
877 | from-coding to-coding) | |
878 | (if (and default-coding | |
879 | ;; We provide the default coding only when it seems that | |
880 | ;; the filename is correctly decoded by the default | |
881 | ;; coding. | |
882 | (let ((charsets (find-charset-string filename))) | |
883 | (and (not (memq 'eight-bit-control charsets)) | |
884 | (not (memq 'eight-bit-graphic charsets))))) | |
885 | (setq from-coding (read-coding-system | |
886 | (format "Recode filename %s from (default %s): " | |
887 | filename default-coding) | |
888 | default-coding)) | |
889 | (setq from-coding (read-coding-system | |
890 | (format "Recode filename %s from: " filename)))) | |
cdec2ad7 | 891 | |
9bdbd98e KH |
892 | ;; We provide the default coding only when a user is going to |
893 | ;; change the encoding not from the default coding. | |
894 | (if (eq from-coding default-coding) | |
895 | (setq to-coding (read-coding-system | |
896 | (format "Recode filename %s from %s to: " | |
897 | filename from-coding))) | |
898 | (setq to-coding (read-coding-system | |
899 | (format "Recode filename %s from %s to (default %s): " | |
900 | filename from-coding default-coding) | |
901 | default-coding))) | |
902 | (list filename from-coding to-coding))) | |
903 | ||
904 | (let* ((default-coding (or file-name-coding-system | |
905 | default-file-name-coding-system)) | |
906 | ;; FILE should have been decoded by DEFAULT-CODING. | |
907 | (encoded (encode-coding-string file default-coding)) | |
908 | (newname (decode-coding-string encoded coding)) | |
909 | (new-encoded (encode-coding-string newname new-coding)) | |
910 | ;; Suppress further encoding. | |
911 | (file-name-coding-system nil) | |
912 | (default-file-name-coding-system nil) | |
913 | (locale-coding-system nil)) | |
914 | (rename-file encoded new-encoded ok-if-already-exists) | |
915 | newname)) | |
b4da00e9 | 916 | \f |
467ff692 RS |
917 | (defun switch-to-buffer-other-window (buffer &optional norecord) |
918 | "Select buffer BUFFER in another window. | |
839857c7 LT |
919 | If BUFFER does not identify an existing buffer, then this function |
920 | creates a buffer with that name. | |
921 | ||
922 | When called from Lisp, BUFFER can be a buffer, a string \(a buffer name), | |
923 | or nil. If BUFFER is nil, then this function chooses a buffer | |
924 | using `other-buffer'. | |
467ff692 | 925 | Optional second arg NORECORD non-nil means |
4c6a4739 | 926 | do not put this buffer at the front of the list of recently selected ones. |
839857c7 | 927 | This function returns the buffer it switched to. |
4c6a4739 EZ |
928 | |
929 | This uses the function `display-buffer' as a subroutine; see its | |
930 | documentation for additional customization information." | |
b4da00e9 | 931 | (interactive "BSwitch to buffer in other window: ") |
cf44b9b7 RS |
932 | (let ((pop-up-windows t) |
933 | ;; Don't let these interfere. | |
934 | same-window-buffer-names same-window-regexps) | |
467ff692 | 935 | (pop-to-buffer buffer t norecord))) |
b4da00e9 | 936 | |
467ff692 RS |
937 | (defun switch-to-buffer-other-frame (buffer &optional norecord) |
938 | "Switch to buffer BUFFER in another frame. | |
939 | Optional second arg NORECORD non-nil means | |
4c6a4739 EZ |
940 | do not put this buffer at the front of the list of recently selected ones. |
941 | ||
942 | This uses the function `display-buffer' as a subroutine; see its | |
943 | documentation for additional customization information." | |
f98955ea | 944 | (interactive "BSwitch to buffer in other frame: ") |
cf44b9b7 RS |
945 | (let ((pop-up-frames t) |
946 | same-window-buffer-names same-window-regexps) | |
467ff692 | 947 | (pop-to-buffer buffer t norecord) |
336b7f41 | 948 | (raise-frame (window-frame (selected-window))))) |
5bbbceb1 | 949 | |
a49a58f9 RS |
950 | (defvar find-file-default nil |
951 | "Used within `find-file-read-args'.") | |
952 | ||
a42e7db0 SM |
953 | (defmacro minibuffer-with-setup-hook (fun &rest body) |
954 | "Add FUN to `minibuffer-setup-hook' while executing BODY. | |
955 | BODY should use the minibuffer at most once. | |
956 | Recursive uses of the minibuffer will not be affected." | |
957 | (declare (indent 1) (debug t)) | |
958 | (let ((hook (make-symbol "setup-hook"))) | |
44dce0fb RS |
959 | `(let (,hook) |
960 | (setq ,hook | |
961 | (lambda () | |
962 | ;; Clear out this hook so it does not interfere | |
963 | ;; with any recursive minibuffer usage. | |
964 | (remove-hook 'minibuffer-setup-hook ,hook) | |
965 | (,fun))) | |
a42e7db0 SM |
966 | (unwind-protect |
967 | (progn | |
968 | (add-hook 'minibuffer-setup-hook ,hook) | |
969 | ,@body) | |
970 | (remove-hook 'minibuffer-setup-hook ,hook))))) | |
971 | ||
05a7cb3d | 972 | (defun find-file-read-args (prompt mustmatch) |
e6f0ff92 RS |
973 | (list (let ((find-file-default |
974 | (and buffer-file-name | |
a42e7db0 SM |
975 | (abbreviate-file-name buffer-file-name)))) |
976 | (minibuffer-with-setup-hook | |
977 | (lambda () (setq minibuffer-default find-file-default)) | |
978 | (read-file-name prompt nil default-directory mustmatch))) | |
b2a26f4e | 979 | t)) |
e6f0ff92 | 980 | |
243ce842 | 981 | (defun find-file (filename &optional wildcards) |
b4da00e9 RM |
982 | "Edit file FILENAME. |
983 | Switch to a buffer visiting file FILENAME, | |
243ce842 | 984 | creating one if none already exists. |
e6f0ff92 RS |
985 | Interactively, the default if you just type RET is the current directory, |
986 | but the visited file name is available through the minibuffer history: | |
987 | type M-n to pull it into the minibuffer. | |
988 | ||
243ce842 | 989 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
91174d63 RS |
990 | expand wildcards (if any) and visit multiple files. You can |
991 | suppress wildcard expansion by setting `find-file-wildcards'. | |
992 | ||
993 | To visit a file without any kind of conversion and without | |
994 | automatically choosing a major mode, use \\[find-file-literally]." | |
a9d6a617 | 995 | (interactive (find-file-read-args "Find file: " nil)) |
5b8ed07b RS |
996 | (let ((value (find-file-noselect filename nil nil wildcards))) |
997 | (if (listp value) | |
998 | (mapcar 'switch-to-buffer (nreverse value)) | |
999 | (switch-to-buffer value)))) | |
82d0954a | 1000 | |
243ce842 | 1001 | (defun find-file-other-window (filename &optional wildcards) |
b4da00e9 RM |
1002 | "Edit file FILENAME, in another window. |
1003 | May create a new window, or reuse an existing one. | |
243ce842 | 1004 | See the function `display-buffer'. |
e6f0ff92 RS |
1005 | |
1006 | Interactively, the default if you just type RET is the current directory, | |
1007 | but the visited file name is available through the minibuffer history: | |
1008 | type M-n to pull it into the minibuffer. | |
1009 | ||
243ce842 RS |
1010 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
1011 | expand wildcards (if any) and visit multiple files." | |
05a7cb3d | 1012 | (interactive (find-file-read-args "Find file in other window: " nil)) |
5b8ed07b RS |
1013 | (let ((value (find-file-noselect filename nil nil wildcards))) |
1014 | (if (listp value) | |
1015 | (progn | |
1016 | (setq value (nreverse value)) | |
a9d6a617 JL |
1017 | (cons (switch-to-buffer-other-window (car value)) |
1018 | (mapcar 'switch-to-buffer (cdr value)))) | |
5b8ed07b | 1019 | (switch-to-buffer-other-window value)))) |
243ce842 RS |
1020 | |
1021 | (defun find-file-other-frame (filename &optional wildcards) | |
f98955ea JB |
1022 | "Edit file FILENAME, in another frame. |
1023 | May create a new frame, or reuse an existing one. | |
243ce842 | 1024 | See the function `display-buffer'. |
e6f0ff92 RS |
1025 | |
1026 | Interactively, the default if you just type RET is the current directory, | |
1027 | but the visited file name is available through the minibuffer history: | |
1028 | type M-n to pull it into the minibuffer. | |
1029 | ||
243ce842 RS |
1030 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
1031 | expand wildcards (if any) and visit multiple files." | |
05a7cb3d | 1032 | (interactive (find-file-read-args "Find file in other frame: " nil)) |
5b8ed07b RS |
1033 | (let ((value (find-file-noselect filename nil nil wildcards))) |
1034 | (if (listp value) | |
1035 | (progn | |
1036 | (setq value (nreverse value)) | |
a9d6a617 JL |
1037 | (cons (switch-to-buffer-other-frame (car value)) |
1038 | (mapcar 'switch-to-buffer (cdr value)))) | |
5b8ed07b | 1039 | (switch-to-buffer-other-frame value)))) |
243ce842 | 1040 | |
46bfc73b JD |
1041 | (defun find-file-existing (filename &optional wildcards) |
1042 | "Edit the existing file FILENAME. | |
1043 | Like \\[find-file] but only allow files that exists." | |
1044 | (interactive (find-file-read-args "Find existing file: " t)) | |
1045 | (unless (file-exists-p filename) (error "%s does not exist" filename)) | |
1046 | (find-file filename wildcards) | |
1047 | (current-buffer)) | |
1048 | ||
243ce842 | 1049 | (defun find-file-read-only (filename &optional wildcards) |
b4da00e9 | 1050 | "Edit file FILENAME but don't allow changes. |
e6f0ff92 | 1051 | Like \\[find-file] but marks buffer as read-only. |
b4da00e9 | 1052 | Use \\[toggle-read-only] to permit editing." |
a9d6a617 JL |
1053 | (interactive (find-file-read-args "Find file read-only: " nil)) |
1054 | (unless (or (and wildcards find-file-wildcards | |
1055 | (not (string-match "\\`/:" filename)) | |
1056 | (string-match "[[*?]" filename)) | |
1057 | (file-exists-p filename)) | |
1058 | (error "%s does not exist" filename)) | |
1059 | (let ((value (find-file filename wildcards))) | |
1060 | (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1))) | |
1061 | (if (listp value) value (list value))) | |
1062 | value)) | |
b4da00e9 | 1063 | |
243ce842 | 1064 | (defun find-file-read-only-other-window (filename &optional wildcards) |
b4da00e9 RM |
1065 | "Edit file FILENAME in another window but don't allow changes. |
1066 | Like \\[find-file-other-window] but marks buffer as read-only. | |
1067 | Use \\[toggle-read-only] to permit editing." | |
a9d6a617 JL |
1068 | (interactive (find-file-read-args "Find file read-only other window: " nil)) |
1069 | (unless (or (and wildcards find-file-wildcards | |
1070 | (not (string-match "\\`/:" filename)) | |
1071 | (string-match "[[*?]" filename)) | |
1072 | (file-exists-p filename)) | |
1073 | (error "%s does not exist" filename)) | |
1074 | (let ((value (find-file-other-window filename wildcards))) | |
1075 | (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1))) | |
1076 | (if (listp value) value (list value))) | |
1077 | value)) | |
b4da00e9 | 1078 | |
243ce842 | 1079 | (defun find-file-read-only-other-frame (filename &optional wildcards) |
f98955ea JB |
1080 | "Edit file FILENAME in another frame but don't allow changes. |
1081 | Like \\[find-file-other-frame] but marks buffer as read-only. | |
5bbbceb1 | 1082 | Use \\[toggle-read-only] to permit editing." |
a9d6a617 JL |
1083 | (interactive (find-file-read-args "Find file read-only other frame: " nil)) |
1084 | (unless (or (and wildcards find-file-wildcards | |
1085 | (not (string-match "\\`/:" filename)) | |
1086 | (string-match "[[*?]" filename)) | |
1087 | (file-exists-p filename)) | |
1088 | (error "%s does not exist" filename)) | |
1089 | (let ((value (find-file-other-frame filename wildcards))) | |
1090 | (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1))) | |
1091 | (if (listp value) value (list value))) | |
1092 | value)) | |
1093 | ||
1094 | (defun find-alternate-file-other-window (filename &optional wildcards) | |
60eaf370 | 1095 | "Find file FILENAME as a replacement for the file in the next window. |
a9d6a617 JL |
1096 | This command does not select that window. |
1097 | ||
1098 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, | |
1099 | expand wildcards (if any) and replace the file with multiple files." | |
60eaf370 RS |
1100 | (interactive |
1101 | (save-selected-window | |
1102 | (other-window 1) | |
1103 | (let ((file buffer-file-name) | |
1104 | (file-name nil) | |
1105 | (file-dir nil)) | |
1106 | (and file | |
1107 | (setq file-name (file-name-nondirectory file) | |
1108 | file-dir (file-name-directory file))) | |
1109 | (list (read-file-name | |
a9d6a617 JL |
1110 | "Find alternate file: " file-dir nil nil file-name) |
1111 | t)))) | |
60eaf370 | 1112 | (if (one-window-p) |
a9d6a617 | 1113 | (find-file-other-window filename wildcards) |
60eaf370 RS |
1114 | (save-selected-window |
1115 | (other-window 1) | |
a9d6a617 | 1116 | (find-alternate-file filename wildcards)))) |
60eaf370 | 1117 | |
a9d6a617 | 1118 | (defun find-alternate-file (filename &optional wildcards) |
b4da00e9 RM |
1119 | "Find file FILENAME, select its buffer, kill previous buffer. |
1120 | If the current buffer now contains an empty file that you just visited | |
a9d6a617 JL |
1121 | \(presumably by mistake), use this command to visit the file you really want. |
1122 | ||
1123 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, | |
1124 | expand wildcards (if any) and replace the file with multiple files." | |
b4da00e9 RM |
1125 | (interactive |
1126 | (let ((file buffer-file-name) | |
1127 | (file-name nil) | |
1128 | (file-dir nil)) | |
1129 | (and file | |
1130 | (setq file-name (file-name-nondirectory file) | |
1131 | file-dir (file-name-directory file))) | |
a61f59b4 | 1132 | (list (read-file-name |
a9d6a617 JL |
1133 | "Find alternate file: " file-dir nil nil file-name) |
1134 | t))) | |
63fabbb4 RS |
1135 | (unless (run-hook-with-args-until-failure 'kill-buffer-query-functions) |
1136 | (error "Aborted")) | |
1137 | (when (and (buffer-modified-p) (buffer-file-name)) | |
1138 | (if (yes-or-no-p (format "Buffer %s is modified; save it first? " | |
1139 | (buffer-name))) | |
1140 | (save-buffer) | |
1141 | (unless (yes-or-no-p "Kill and replace the buffer without saving it? ") | |
1142 | (error "Aborted")))) | |
b4da00e9 RM |
1143 | (let ((obuf (current-buffer)) |
1144 | (ofile buffer-file-name) | |
8bb27285 | 1145 | (onum buffer-file-number) |
37c58ca6 | 1146 | (odir dired-directory) |
8bb27285 | 1147 | (otrue buffer-file-truename) |
b4da00e9 | 1148 | (oname (buffer-name))) |
baf9b8c4 RS |
1149 | (if (get-buffer " **lose**") |
1150 | (kill-buffer " **lose**")) | |
b4da00e9 | 1151 | (rename-buffer " **lose**") |
b4da00e9 RM |
1152 | (unwind-protect |
1153 | (progn | |
1154 | (unlock-buffer) | |
7906c044 RS |
1155 | ;; This prevents us from finding the same buffer |
1156 | ;; if we specified the same file again. | |
a4ad4d96 RS |
1157 | (setq buffer-file-name nil) |
1158 | (setq buffer-file-number nil) | |
1159 | (setq buffer-file-truename nil) | |
7906c044 RS |
1160 | ;; Likewise for dired buffers. |
1161 | (setq dired-directory nil) | |
a9d6a617 | 1162 | (find-file filename wildcards)) |
63fabbb4 RS |
1163 | (when (eq obuf (current-buffer)) |
1164 | ;; This executes if find-file gets an error | |
1165 | ;; and does not really find anything. | |
1166 | ;; We put things back as they were. | |
1167 | ;; If find-file actually finds something, we kill obuf below. | |
1168 | (setq buffer-file-name ofile) | |
1169 | (setq buffer-file-number onum) | |
1170 | (setq buffer-file-truename otrue) | |
7906c044 | 1171 | (setq dired-directory odir) |
63fabbb4 RS |
1172 | (lock-buffer) |
1173 | (rename-buffer oname))) | |
1174 | (unless (eq (current-buffer) obuf) | |
d97a9ff3 RS |
1175 | (with-current-buffer obuf |
1176 | ;; We already asked; don't ask again. | |
1177 | (let ((kill-buffer-query-functions)) | |
1178 | (kill-buffer obuf)))))) | |
9b8ef27d | 1179 | \f |
b4da00e9 RM |
1180 | (defun create-file-buffer (filename) |
1181 | "Create a suitably named buffer for visiting FILENAME, and return it. | |
1182 | FILENAME (sans directory) is used unchanged if that name is free; | |
1183 | otherwise a string <2> or <3> or ... is appended to get an unused name." | |
1184 | (let ((lastname (file-name-nondirectory filename))) | |
1185 | (if (string= lastname "") | |
1186 | (setq lastname filename)) | |
1187 | (generate-new-buffer lastname))) | |
1188 | ||
5bbbceb1 JB |
1189 | (defun generate-new-buffer (name) |
1190 | "Create and return a buffer with a name based on NAME. | |
29165787 | 1191 | Choose the buffer's name using `generate-new-buffer-name'." |
5bbbceb1 JB |
1192 | (get-buffer-create (generate-new-buffer-name name))) |
1193 | ||
ffc0e1ca AS |
1194 | (defcustom automount-dir-prefix "^/tmp_mnt/" |
1195 | "Regexp to match the automounter prefix in a directory name." | |
1196 | :group 'files | |
1197 | :type 'regexp) | |
e373f201 | 1198 | |
ffb3a4db | 1199 | (defvar abbreviated-home-dir nil |
ffc0e1ca | 1200 | "The user's homedir abbreviated according to `directory-abbrev-alist'.") |
ffb3a4db | 1201 | |
5bbbceb1 | 1202 | (defun abbreviate-file-name (filename) |
29165787 | 1203 | "Return a version of FILENAME shortened using `directory-abbrev-alist'. |
b69a0de9 | 1204 | This also substitutes \"~\" for the user's home directory and |
5baabf7b | 1205 | removes automounter prefixes (see the variable `automount-dir-prefix')." |
e373f201 | 1206 | ;; Get rid of the prefixes added by the automounter. |
a8f34fc0 RS |
1207 | (if (and automount-dir-prefix |
1208 | (string-match automount-dir-prefix filename) | |
e373f201 JB |
1209 | (file-exists-p (file-name-directory |
1210 | (substring filename (1- (match-end 0)))))) | |
1211 | (setq filename (substring filename (1- (match-end 0))))) | |
5bbbceb1 | 1212 | (let ((tail directory-abbrev-alist)) |
ffb3a4db RS |
1213 | ;; If any elt of directory-abbrev-alist matches this name, |
1214 | ;; abbreviate accordingly. | |
5bbbceb1 JB |
1215 | (while tail |
1216 | (if (string-match (car (car tail)) filename) | |
1217 | (setq filename | |
1218 | (concat (cdr (car tail)) (substring filename (match-end 0))))) | |
1219 | (setq tail (cdr tail))) | |
ffb3a4db RS |
1220 | ;; Compute and save the abbreviated homedir name. |
1221 | ;; We defer computing this until the first time it's needed, to | |
1222 | ;; give time for directory-abbrev-alist to be set properly. | |
e98dda89 RS |
1223 | ;; We include a slash at the end, to avoid spurious matches |
1224 | ;; such as `/usr/foobar' when the home dir is `/usr/foo'. | |
ffb3a4db RS |
1225 | (or abbreviated-home-dir |
1226 | (setq abbreviated-home-dir | |
1227 | (let ((abbreviated-home-dir "$foo")) | |
3a8a836d RS |
1228 | (concat "^" (abbreviate-file-name (expand-file-name "~")) |
1229 | "\\(/\\|$\\)")))) | |
76d5492b | 1230 | |
ffb3a4db RS |
1231 | ;; If FILENAME starts with the abbreviated homedir, |
1232 | ;; make it start with `~' instead. | |
ca33ccb5 RS |
1233 | (if (and (string-match abbreviated-home-dir filename) |
1234 | ;; If the home dir is just /, don't change it. | |
1235 | (not (and (= (match-end 0) 1) | |
288201bd | 1236 | (= (aref filename 0) ?/))) |
567c1ca9 RS |
1237 | ;; MS-DOS root directories can come with a drive letter; |
1238 | ;; Novell Netware allows drive letters beyond `Z:'. | |
76d5492b | 1239 | (not (and (or (eq system-type 'ms-dos) |
c60ee5e7 | 1240 | (eq system-type 'cygwin) |
c32d49e8 | 1241 | (eq system-type 'windows-nt)) |
288201bd | 1242 | (save-match-data |
567c1ca9 | 1243 | (string-match "^[a-zA-`]:/$" filename))))) |
5bbbceb1 | 1244 | (setq filename |
28dbf501 | 1245 | (concat "~" |
3a8a836d | 1246 | (substring filename (match-beginning 1) (match-end 1)) |
28dbf501 | 1247 | (substring filename (match-end 0))))) |
5bbbceb1 JB |
1248 | filename)) |
1249 | ||
21540597 | 1250 | (defcustom find-file-not-true-dirname-list nil |
1770543d RS |
1251 | "*List of logical names for which visiting shouldn't save the true dirname. |
1252 | On VMS, when you visit a file using a logical name that searches a path, | |
1253 | you may or may not want the visited file name to record the specific | |
1254 | directory where the file was found. If you *do not* want that, add the logical | |
21540597 RS |
1255 | name to this list as a string." |
1256 | :type '(repeat (string :tag "Name")) | |
1257 | :group 'find-file) | |
1770543d | 1258 | |
3a64a3cf | 1259 | (defun find-buffer-visiting (filename &optional predicate) |
138c44f6 KH |
1260 | "Return the buffer visiting file FILENAME (a string). |
1261 | This is like `get-file-buffer', except that it checks for any buffer | |
1262 | visiting the same file, possibly under a different name. | |
a1b0c2a7 RS |
1263 | If PREDICATE is non-nil, only buffers satisfying it are eligible, |
1264 | and others are ignored. | |
138c44f6 | 1265 | If there is no such live buffer, return nil." |
3a64a3cf JB |
1266 | (let ((predicate (or predicate #'identity)) |
1267 | (truename (abbreviate-file-name (file-truename filename)))) | |
1268 | (or (let ((buf (get-file-buffer filename))) | |
1269 | (when (and buf (funcall predicate buf)) buf)) | |
1270 | (let ((list (buffer-list)) found) | |
1271 | (while (and (not found) list) | |
1272 | (save-excursion | |
1273 | (set-buffer (car list)) | |
1274 | (if (and buffer-file-name | |
1275 | (string= buffer-file-truename truename) | |
1276 | (funcall predicate (current-buffer))) | |
1277 | (setq found (car list)))) | |
1278 | (setq list (cdr list))) | |
1279 | found) | |
1280 | (let* ((attributes (file-attributes truename)) | |
1281 | (number (nthcdr 10 attributes)) | |
1282 | (list (buffer-list)) found) | |
1283 | (and buffer-file-numbers-unique | |
1284 | number | |
1285 | (while (and (not found) list) | |
1286 | (with-current-buffer (car list) | |
1287 | (if (and buffer-file-name | |
1288 | (equal buffer-file-number number) | |
1289 | ;; Verify this buffer's file number | |
1290 | ;; still belongs to its file. | |
1291 | (file-exists-p buffer-file-name) | |
1292 | (equal (file-attributes buffer-file-truename) | |
1293 | attributes) | |
1294 | (funcall predicate (current-buffer))) | |
1295 | (setq found (car list)))) | |
1296 | (setq list (cdr list)))) | |
1297 | found)))) | |
9b8ef27d | 1298 | \f |
5de148a2 RS |
1299 | (defcustom find-file-wildcards t |
1300 | "*Non-nil means file-visiting commands should handle wildcards. | |
1301 | For example, if you specify `*.c', that would visit all the files | |
1302 | whose names match the pattern." | |
1303 | :group 'files | |
3957c982 | 1304 | :version "20.4" |
5de148a2 RS |
1305 | :type 'boolean) |
1306 | ||
ffc0e1ca AS |
1307 | (defcustom find-file-suppress-same-file-warnings nil |
1308 | "*Non-nil means suppress warning messages for symlinked files. | |
1309 | When nil, Emacs prints a warning when visiting a file that is already | |
1310 | visited, but with a different name. Setting this option to t | |
1311 | suppresses this warning." | |
1312 | :group 'files | |
1313 | :version "21.1" | |
1314 | :type 'boolean) | |
1315 | ||
818286f4 | 1316 | (defcustom large-file-warning-threshold 10000000 |
5d648479 JPW |
1317 | "Maximum size of file above which a confirmation is requested. |
1318 | When nil, never request confirmation." | |
1319 | :group 'files | |
1320 | :group 'find-file | |
bf247b6e | 1321 | :version "22.1" |
5d648479 | 1322 | :type '(choice integer (const :tag "Never request confirmation" nil))) |
818286f4 | 1323 | |
243ce842 | 1324 | (defun find-file-noselect (filename &optional nowarn rawfile wildcards) |
b4da00e9 RM |
1325 | "Read file FILENAME into a buffer and return the buffer. |
1326 | If a buffer exists visiting FILENAME, return that one, but | |
1327 | verify that the file has not changed since visited or saved. | |
82d0954a KH |
1328 | The buffer is not selected, just returned to the caller. |
1329 | Optional first arg NOWARN non-nil means suppress any warning messages. | |
243ce842 RS |
1330 | Optional second arg RAWFILE non-nil means the file is read literally. |
1331 | Optional third arg WILDCARDS non-nil means do wildcard processing | |
5b8ed07b | 1332 | and visit all the matching files. When wildcards are actually |
a9d6a617 JL |
1333 | used and expanded, return a list of buffers that are visiting |
1334 | the various files." | |
e373f201 JB |
1335 | (setq filename |
1336 | (abbreviate-file-name | |
1337 | (expand-file-name filename))) | |
b4da00e9 | 1338 | (if (file-directory-p filename) |
ffc0e1ca AS |
1339 | (or (and find-file-run-dired |
1340 | (run-hook-with-args-until-success | |
1341 | 'find-directory-functions | |
1342 | (if find-file-visit-truename | |
1343 | (abbreviate-file-name (file-truename filename)) | |
1344 | filename))) | |
1345 | (error "%s is a directory" filename)) | |
243ce842 RS |
1346 | (if (and wildcards |
1347 | find-file-wildcards | |
f91fe604 | 1348 | (not (string-match "\\`/:" filename)) |
5de148a2 | 1349 | (string-match "[[*?]" filename)) |
ffc0e1ca AS |
1350 | (let ((files (condition-case nil |
1351 | (file-expand-wildcards filename t) | |
1352 | (error (list filename)))) | |
5de148a2 | 1353 | (find-file-wildcards nil)) |
f91fe604 | 1354 | (if (null files) |
ffc0e1ca | 1355 | (find-file-noselect filename) |
648ec2ff | 1356 | (mapcar #'find-file-noselect files))) |
5de148a2 RS |
1357 | (let* ((buf (get-file-buffer filename)) |
1358 | (truename (abbreviate-file-name (file-truename filename))) | |
818286f4 SM |
1359 | (attributes (file-attributes truename)) |
1360 | (number (nthcdr 10 attributes)) | |
5de148a2 RS |
1361 | ;; Find any buffer for a file which has same truename. |
1362 | (other (and (not buf) (find-buffer-visiting filename)))) | |
1363 | ;; Let user know if there is a buffer with the same truename. | |
1364 | (if other | |
1365 | (progn | |
1366 | (or nowarn | |
ffc0e1ca | 1367 | find-file-suppress-same-file-warnings |
5de148a2 RS |
1368 | (string-equal filename (buffer-file-name other)) |
1369 | (message "%s and %s are the same file" | |
1370 | filename (buffer-file-name other))) | |
1371 | ;; Optionally also find that buffer. | |
1372 | (if (or find-file-existing-other-name find-file-visit-truename) | |
1373 | (setq buf other)))) | |
818286f4 SM |
1374 | ;; Check to see if the file looks uncommonly large. |
1375 | (when (and large-file-warning-threshold (nth 7 attributes) | |
1376 | ;; Don't ask again if we already have the file or | |
1377 | ;; if we're asked to be quiet. | |
1378 | (not (or buf nowarn)) | |
1379 | (> (nth 7 attributes) large-file-warning-threshold) | |
1380 | (not (y-or-n-p | |
1381 | (format "File %s is large (%sMB), really open? " | |
1382 | (file-name-nondirectory filename) | |
1383 | (/ (nth 7 attributes) 1048576))))) | |
1384 | (error "Aborted")) | |
5de148a2 RS |
1385 | (if buf |
1386 | ;; We are using an existing buffer. | |
1387 | (progn | |
1388 | (or nowarn | |
1389 | (verify-visited-file-modtime buf) | |
1390 | (cond ((not (file-exists-p filename)) | |
1391 | (error "File %s no longer exists!" filename)) | |
1392 | ;; Certain files should be reverted automatically | |
1393 | ;; if they have changed on disk and not in the buffer. | |
1394 | ((and (not (buffer-modified-p buf)) | |
1395 | (let ((tail revert-without-query) | |
1396 | (found nil)) | |
1397 | (while tail | |
1398 | (if (string-match (car tail) filename) | |
1399 | (setq found t)) | |
1400 | (setq tail (cdr tail))) | |
1401 | found)) | |
1402 | (with-current-buffer buf | |
1403 | (message "Reverting file %s..." filename) | |
1404 | (revert-buffer t t) | |
1405 | (message "Reverting file %s...done" filename))) | |
1406 | ((yes-or-no-p | |
1407 | (if (string= (file-name-nondirectory filename) | |
1408 | (buffer-name buf)) | |
1409 | (format | |
1410 | (if (buffer-modified-p buf) | |
1411 | "File %s changed on disk. Discard your edits? " | |
1412 | "File %s changed on disk. Reread from disk? ") | |
1413 | (file-name-nondirectory filename)) | |
ddd64da9 RS |
1414 | (format |
1415 | (if (buffer-modified-p buf) | |
5de148a2 RS |
1416 | "File %s changed on disk. Discard your edits in %s? " |
1417 | "File %s changed on disk. Reread from disk into %s? ") | |
1418 | (file-name-nondirectory filename) | |
1419 | (buffer-name buf)))) | |
1420 | (with-current-buffer buf | |
1421 | (revert-buffer t t))))) | |
1422 | (with-current-buffer buf | |
a8d002d2 GM |
1423 | |
1424 | ;; Check if a formerly read-only file has become | |
e554eeb7 RS |
1425 | ;; writable and vice versa, but if the buffer agrees |
1426 | ;; with the new state of the file, that is ok too. | |
a8d002d2 | 1427 | (let ((read-only (not (file-writable-p buffer-file-name)))) |
e554eeb7 RS |
1428 | (unless (or (eq read-only buffer-file-read-only) |
1429 | (eq read-only buffer-read-only)) | |
a8d002d2 | 1430 | (when (or nowarn |
36236b72 | 1431 | (let ((question |
a8d002d2 GM |
1432 | (format "File %s is %s on disk. Change buffer mode? " |
1433 | buffer-file-name | |
1434 | (if read-only "read-only" "writable")))) | |
1435 | (y-or-n-p question))) | |
e554eeb7 RS |
1436 | (setq buffer-read-only read-only))) |
1437 | (setq buffer-file-read-only read-only)) | |
a8d002d2 | 1438 | |
ef59dd3b EZ |
1439 | (when (and (not (eq (not (null rawfile)) |
1440 | (not (null find-file-literally)))) | |
1441 | ;; It is confusing to ask whether to visit | |
1442 | ;; non-literally if they have the file in | |
1443 | ;; hexl-mode. | |
1444 | (not (eq major-mode 'hexl-mode))) | |
5de148a2 | 1445 | (if (buffer-modified-p) |
ddd64da9 | 1446 | (if (y-or-n-p (if rawfile |
5de148a2 RS |
1447 | "Save file and revisit literally? " |
1448 | "Save file and revisit non-literally? ")) | |
1449 | (progn | |
1450 | (save-buffer) | |
1451 | (find-file-noselect-1 buf filename nowarn | |
1452 | rawfile truename number)) | |
1453 | (if (y-or-n-p (if rawfile | |
1454 | "Discard your edits and revisit file literally? " | |
1455 | "Discard your edits and revisit file non-literally? ")) | |
1456 | (find-file-noselect-1 buf filename nowarn | |
1457 | rawfile truename number) | |
1458 | (error (if rawfile "File already visited non-literally" | |
1459 | "File already visited literally")))) | |
1460 | (if (y-or-n-p (if rawfile | |
1461 | "Revisit file literally? " | |
1462 | "Revisit file non-literally? ")) | |
1463 | (find-file-noselect-1 buf filename nowarn | |
1464 | rawfile truename number) | |
1465 | (error (if rawfile "File already visited non-literally" | |
1466 | "File already visited literally")))))) | |
1467 | ;; Return the buffer we are using. | |
1468 | buf) | |
1469 | ;; Create a new buffer. | |
1470 | (setq buf (create-file-buffer filename)) | |
1471 | (set-buffer-major-mode buf) | |
1472 | ;; find-file-noselect-1 may use a different buffer. | |
1473 | (find-file-noselect-1 buf filename nowarn | |
1474 | rawfile truename number)))))) | |
ddd64da9 RS |
1475 | |
1476 | (defun find-file-noselect-1 (buf filename nowarn rawfile truename number) | |
4edcfd17 | 1477 | (let (error) |
ddd64da9 RS |
1478 | (with-current-buffer buf |
1479 | (kill-local-variable 'find-file-literally) | |
b296cbd4 RS |
1480 | ;; Needed in case we are re-visiting the file with a different |
1481 | ;; text representation. | |
e73ec04b | 1482 | (kill-local-variable 'buffer-file-coding-system) |
4ad1689f | 1483 | (kill-local-variable 'cursor-type) |
4edcfd17 | 1484 | (let ((inhibit-read-only t)) |
0a11c70b LT |
1485 | (erase-buffer)) |
1486 | (and (default-value 'enable-multibyte-characters) | |
1487 | (not rawfile) | |
1488 | (set-buffer-multibyte t)) | |
1489 | (if rawfile | |
74dca654 | 1490 | (condition-case () |
0a11c70b LT |
1491 | (let ((inhibit-read-only t)) |
1492 | (insert-file-contents-literally filename t)) | |
74dca654 LT |
1493 | (file-error |
1494 | (when (and (file-exists-p filename) | |
1495 | (not (file-readable-p filename))) | |
1496 | (kill-buffer buf) | |
1497 | (signal 'file-error (list "File is not readable" | |
1498 | filename))) | |
0a11c70b LT |
1499 | ;; Unconditionally set error |
1500 | (setq error t))) | |
1501 | (condition-case () | |
1502 | (let ((inhibit-read-only t)) | |
1503 | (insert-file-contents filename t)) | |
1504 | (file-error | |
1505 | (when (and (file-exists-p filename) | |
1506 | (not (file-readable-p filename))) | |
1507 | (kill-buffer buf) | |
1508 | (signal 'file-error (list "File is not readable" | |
1509 | filename))) | |
1510 | ;; Run find-file-not-found-hooks until one returns non-nil. | |
1511 | (or (run-hook-with-args-until-success 'find-file-not-found-functions) | |
1512 | ;; If they fail too, set error. | |
1513 | (setq error t))))) | |
b120e713 KH |
1514 | ;; Record the file's truename, and maybe use that as visited name. |
1515 | (if (equal filename buffer-file-name) | |
1516 | (setq buffer-file-truename truename) | |
9ab19105 DL |
1517 | (setq buffer-file-truename |
1518 | (abbreviate-file-name (file-truename buffer-file-name)))) | |
ddd64da9 RS |
1519 | (setq buffer-file-number number) |
1520 | ;; On VMS, we may want to remember which directory in a search list | |
1521 | ;; the file was found in. | |
1522 | (and (eq system-type 'vax-vms) | |
1523 | (let (logical) | |
1524 | (if (string-match ":" (file-name-directory filename)) | |
1525 | (setq logical (substring (file-name-directory filename) | |
1526 | 0 (match-beginning 0)))) | |
1527 | (not (member logical find-file-not-true-dirname-list))) | |
1528 | (setq buffer-file-name buffer-file-truename)) | |
1529 | (if find-file-visit-truename | |
1530 | (setq buffer-file-name | |
1531 | (setq filename | |
1532 | (expand-file-name buffer-file-truename)))) | |
1533 | ;; Set buffer's default directory to that of the file. | |
b120e713 | 1534 | (setq default-directory (file-name-directory buffer-file-name)) |
ddd64da9 RS |
1535 | ;; Turn off backup files for certain file names. Since |
1536 | ;; this is a permanent local, the major mode won't eliminate it. | |
1537 | (and (not (funcall backup-enable-predicate buffer-file-name)) | |
1538 | (progn | |
1539 | (make-local-variable 'backup-inhibited) | |
1540 | (setq backup-inhibited t))) | |
f402ba38 RS |
1541 | (if rawfile |
1542 | (progn | |
1543 | (set-buffer-multibyte nil) | |
1544 | (setq buffer-file-coding-system 'no-conversion) | |
1545 | (make-local-variable 'find-file-literally) | |
1546 | (setq find-file-literally t)) | |
1547 | (after-find-file error (not nowarn))) | |
1548 | (current-buffer)))) | |
9b8ef27d RS |
1549 | \f |
1550 | (defun insert-file-contents-literally (filename &optional visit beg end replace) | |
1551 | "Like `insert-file-contents', but only reads in the file literally. | |
1552 | A buffer may be modified in several ways after reading into the buffer, | |
1553 | to Emacs features such as format decoding, character code | |
0370fe77 | 1554 | conversion, `find-file-hook', automatic uncompression, etc. |
9b8ef27d RS |
1555 | |
1556 | This function ensures that none of these modifications will take place." | |
1557 | (let ((format-alist nil) | |
1558 | (after-insert-file-functions nil) | |
1559 | (coding-system-for-read 'no-conversion) | |
1560 | (coding-system-for-write 'no-conversion) | |
9b8ef27d | 1561 | (find-buffer-file-type-function |
cdec2ad7 JB |
1562 | (if (fboundp 'find-buffer-file-type) |
1563 | (symbol-function 'find-buffer-file-type) | |
1564 | nil)) | |
1565 | (inhibit-file-name-handlers | |
1566 | (append '(jka-compr-handler image-file-handler) | |
1567 | inhibit-file-name-handlers)) | |
1568 | (inhibit-file-name-operation 'insert-file-contents)) | |
9b8ef27d | 1569 | (unwind-protect |
cdec2ad7 JB |
1570 | (progn |
1571 | (fset 'find-buffer-file-type (lambda (filename) t)) | |
1572 | (insert-file-contents filename visit beg end replace)) | |
9b8ef27d RS |
1573 | (if find-buffer-file-type-function |
1574 | (fset 'find-buffer-file-type find-buffer-file-type-function) | |
1575 | (fmakunbound 'find-buffer-file-type))))) | |
1576 | ||
3a64a3cf JB |
1577 | (defun insert-file-1 (filename insert-func) |
1578 | (if (file-directory-p filename) | |
1579 | (signal 'file-error (list "Opening input file" "file is a directory" | |
1580 | filename))) | |
1581 | (let* ((buffer (find-buffer-visiting (abbreviate-file-name (file-truename filename)) | |
1582 | #'buffer-modified-p)) | |
1583 | (tem (funcall insert-func filename))) | |
1584 | (push-mark (+ (point) (car (cdr tem)))) | |
1585 | (when buffer | |
1586 | (message "File %s already visited and modified in buffer %s" | |
1587 | filename (buffer-name buffer))))) | |
1588 | ||
9b8ef27d RS |
1589 | (defun insert-file-literally (filename) |
1590 | "Insert contents of file FILENAME into buffer after point with no conversion. | |
1591 | ||
1592 | This function is meant for the user to run interactively. | |
1593 | Don't call it from programs! Use `insert-file-contents-literally' instead. | |
1594 | \(Its calling sequence is different; see its documentation)." | |
1595 | (interactive "*fInsert file literally: ") | |
3a64a3cf | 1596 | (insert-file-1 filename #'insert-file-contents-literally)) |
9b8ef27d RS |
1597 | |
1598 | (defvar find-file-literally nil | |
1599 | "Non-nil if this buffer was made by `find-file-literally' or equivalent. | |
1600 | This is a permanent local.") | |
1601 | (put 'find-file-literally 'permanent-local t) | |
5fc196af | 1602 | |
ffc0e1ca | 1603 | (defun find-file-literally (filename) |
5fc196af RS |
1604 | "Visit file FILENAME with no conversion of any kind. |
1605 | Format conversion and character code conversion are both disabled, | |
1606 | and multibyte characters are disabled in the resulting buffer. | |
e65db7b8 RS |
1607 | The major mode used is Fundamental mode regardless of the file name, |
1608 | and local variable specifications in the file are ignored. | |
407b4328 GM |
1609 | Automatic uncompression and adding a newline at the end of the |
1610 | file due to `require-final-newline' is also disabled. | |
9b8ef27d RS |
1611 | |
1612 | You cannot absolutely rely on this function to result in | |
b9aa9537 | 1613 | visiting the file literally. If Emacs already has a buffer |
9b8ef27d RS |
1614 | which is visiting the file, you get the existing buffer, |
1615 | regardless of whether it was created literally or not. | |
1616 | ||
1617 | In a Lisp program, if you want to be sure of accessing a file's | |
1618 | contents literally, you should create a temporary buffer and then read | |
1619 | the file contents into it using `insert-file-contents-literally'." | |
5fc196af | 1620 | (interactive "FFind file literally: ") |
9b8ef27d | 1621 | (switch-to-buffer (find-file-noselect filename nil t))) |
b4da00e9 | 1622 | \f |
f7d786d0 RS |
1623 | (defvar after-find-file-from-revert-buffer nil) |
1624 | ||
e0ab8879 | 1625 | (defun after-find-file (&optional error warn noauto |
9a30563f RS |
1626 | after-find-file-from-revert-buffer |
1627 | nomodes) | |
b4da00e9 RM |
1628 | "Called after finding a file and by the default revert function. |
1629 | Sets buffer mode, parses local variables. | |
8cfb9d46 | 1630 | Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an |
b4da00e9 RM |
1631 | error in reading the file. WARN non-nil means warn if there |
1632 | exists an auto-save file more recent than the visited file. | |
8cfb9d46 | 1633 | NOAUTO means don't mess with auto-save mode. |
e0ab8879 RS |
1634 | Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil |
1635 | means this call was from `revert-buffer'. | |
9a30563f | 1636 | Fifth arg NOMODES non-nil means don't alter the file's modes. |
0370fe77 | 1637 | Finishes by calling the functions in `find-file-hook' |
9a30563f | 1638 | unless NOMODES is non-nil." |
b4da00e9 RM |
1639 | (setq buffer-read-only (not (file-writable-p buffer-file-name))) |
1640 | (if noninteractive | |
1641 | nil | |
1642 | (let* (not-serious | |
1643 | (msg | |
fe50b6ab GM |
1644 | (cond |
1645 | ((not warn) nil) | |
1646 | ((and error (file-attributes buffer-file-name)) | |
1647 | (setq buffer-read-only t) | |
1648 | "File exists, but cannot be read") | |
1649 | ((not buffer-read-only) | |
1650 | (if (and warn | |
1651 | ;; No need to warn if buffer is auto-saved | |
1652 | ;; under the name of the visited file. | |
1653 | (not (and buffer-file-name | |
1654 | auto-save-visited-file-name)) | |
1655 | (file-newer-than-file-p (or buffer-auto-save-file-name | |
1656 | (make-auto-save-file-name)) | |
1657 | buffer-file-name)) | |
64d18e8f | 1658 | (format "%s has auto save data; consider M-x recover-this-file" |
fe50b6ab GM |
1659 | (file-name-nondirectory buffer-file-name)) |
1660 | (setq not-serious t) | |
1661 | (if error "(New file)" nil))) | |
1662 | ((not error) | |
1663 | (setq not-serious t) | |
1664 | "Note: file is write protected") | |
1665 | ((file-attributes (directory-file-name default-directory)) | |
1666 | "File not found and directory write-protected") | |
1667 | ((file-exists-p (file-name-directory buffer-file-name)) | |
1668 | (setq buffer-read-only nil)) | |
1669 | (t | |
1670 | (setq buffer-read-only nil) | |
07703430 | 1671 | "Use M-x make-directory RET RET to create the directory and its parents")))) |
fe50b6ab | 1672 | (when msg |
a74357d4 | 1673 | (message "%s" msg) |
e09f3bff | 1674 | (or not-serious (sit-for 1 t)))) |
fe50b6ab GM |
1675 | (when (and auto-save-default (not noauto)) |
1676 | (auto-save-mode t))) | |
ffc0e1ca AS |
1677 | ;; Make people do a little extra work (C-x C-q) |
1678 | ;; before altering a backup file. | |
fe50b6ab GM |
1679 | (when (backup-file-name-p buffer-file-name) |
1680 | (setq buffer-read-only t)) | |
8fd9c174 RS |
1681 | ;; When a file is marked read-only, |
1682 | ;; make the buffer read-only even if root is looking at it. | |
879365c6 KS |
1683 | (when (and (file-modes (buffer-file-name)) |
1684 | (zerop (logand (file-modes (buffer-file-name)) #o222))) | |
8fd9c174 | 1685 | (setq buffer-read-only t)) |
fe50b6ab GM |
1686 | (unless nomodes |
1687 | (when (and view-read-only view-mode) | |
1688 | (view-mode-disable)) | |
9a30563f | 1689 | (normal-mode t) |
f4206092 RS |
1690 | ;; If requested, add a newline at the end of the file. |
1691 | (and (memq require-final-newline '(visit visit-save)) | |
1692 | (> (point-max) (point-min)) | |
1693 | (/= (char-after (1- (point-max))) ?\n) | |
1694 | (not (and (eq selective-display t) | |
1695 | (= (char-after (1- (point-max))) ?\r))) | |
1696 | (save-excursion | |
1697 | (goto-char (point-max)) | |
1698 | (insert "\n"))) | |
fe50b6ab GM |
1699 | (when (and buffer-read-only |
1700 | view-read-only | |
1701 | (not (eq (get major-mode 'mode-class) 'special))) | |
1702 | (view-mode-enter)) | |
0370fe77 | 1703 | (run-hooks 'find-file-hook))) |
b4da00e9 | 1704 | |
818286f4 SM |
1705 | (defmacro report-errors (format &rest body) |
1706 | "Eval BODY and turn any error into a FORMAT message. | |
1707 | FORMAT can have a %s escape which will be replaced with the actual error. | |
1708 | If `debug-on-error' is set, errors are not caught, so that you can | |
1709 | debug them. | |
1710 | Avoid using a large BODY since it is duplicated." | |
1711 | (declare (debug t) (indent 1)) | |
1712 | `(if debug-on-error | |
1713 | (progn . ,body) | |
1714 | (condition-case err | |
1715 | (progn . ,body) | |
1716 | (error (message ,format (prin1-to-string err)))))) | |
1717 | ||
b4da00e9 RM |
1718 | (defun normal-mode (&optional find-file) |
1719 | "Choose the major mode for this buffer automatically. | |
1720 | Also sets up any specified local variables of the file. | |
1721 | Uses the visited file name, the -*- line, and the local variables spec. | |
1722 | ||
1723 | This function is called automatically from `find-file'. In that case, | |
aa5fcebf KH |
1724 | we may set up the file-specified mode and local variables, |
1725 | depending on the value of `enable-local-variables': if it is t, we do; | |
1726 | if it is nil, we don't; otherwise, we query. | |
1727 | In addition, if `local-enable-local-variables' is nil, we do | |
1728 | not set local variables (though we do notice a mode specified with -*-.) | |
1729 | ||
1730 | `enable-local-variables' is ignored if you run `normal-mode' interactively, | |
1731 | or from Lisp without specifying the optional argument FIND-FILE; | |
1732 | in that case, this function acts as if `enable-local-variables' were t." | |
b4da00e9 RM |
1733 | (interactive) |
1734 | (or find-file (funcall (or default-major-mode 'fundamental-mode))) | |
0fc205c6 LT |
1735 | (let ((enable-local-variables (or (not find-file) enable-local-variables))) |
1736 | (report-errors "File mode specification error: %s" | |
1737 | (set-auto-mode)) | |
1738 | (report-errors "File local-variables error: %s" | |
818286f4 | 1739 | (hack-local-variables))) |
24c9eeeb DL |
1740 | (if (fboundp 'ucs-set-table-for-input) ; don't lose when building |
1741 | (ucs-set-table-for-input))) | |
b4da00e9 | 1742 | |
f76e0cd0 | 1743 | (defvar auto-mode-alist |
f209c999 MS |
1744 | ;; Note: The entries for the modes defined in cc-mode.el (c-mode, |
1745 | ;; c++-mode, java-mode and more) are added through autoload | |
1746 | ;; directives in that file. That way is discouraged since it | |
1747 | ;; spreads out the definition of the initial value. | |
ffc0e1ca AS |
1748 | (mapc |
1749 | (lambda (elt) | |
1750 | (cons (purecopy (car elt)) (cdr elt))) | |
813731b3 | 1751 | `(;; do this first, so that .html.pl is Polish html, not Perl |
9e6f5419 DP |
1752 | ("\\.s?html?\\(\\.[a-zA-Z_]+\\)?\\'" . html-mode) |
1753 | ("\\.te?xt\\'" . text-mode) | |
bbc67516 | 1754 | ("\\.[tT]e[xX]\\'" . tex-mode) |
4e163715 | 1755 | ("\\.ins\\'" . tex-mode) ;Installation files for TeX packages. |
ffc0e1ca | 1756 | ("\\.ltx\\'" . latex-mode) |
4e163715 | 1757 | ("\\.dtx\\'" . doctex-mode) |
ffc0e1ca | 1758 | ("\\.el\\'" . emacs-lisp-mode) |
21575d92 | 1759 | ("\\.\\(scm\\|stk\\|ss\\|sch\\)\\'" . scheme-mode) |
ffc0e1ca | 1760 | ("\\.l\\'" . lisp-mode) |
bbc67516 DP |
1761 | ("\\.li?sp\\'" . lisp-mode) |
1762 | ("\\.[fF]\\'" . fortran-mode) | |
ffc0e1ca AS |
1763 | ("\\.for\\'" . fortran-mode) |
1764 | ("\\.p\\'" . pascal-mode) | |
1765 | ("\\.pas\\'" . pascal-mode) | |
1766 | ("\\.ad[abs]\\'" . ada-mode) | |
7defe888 | 1767 | ("\\.ad[bs].dg\\'" . ada-mode) |
bbc67516 | 1768 | ("\\.\\([pP]\\([Llm]\\|erl\\|od\\)\\|al\\)\\'" . perl-mode) |
813731b3 DP |
1769 | ,@(if (memq system-type '(berkeley-unix next-mach darwin)) |
1770 | '(("\\.mk\\'" . makefile-bsdmake-mode) | |
47d4e709 | 1771 | ("GNUmakefile\\'" . makefile-gmake-mode) |
813731b3 DP |
1772 | ("[Mm]akefile\\'" . makefile-bsdmake-mode)) |
1773 | '(("\\.mk\\'" . makefile-gmake-mode) ; Might be any make, give Gnu the host advantage | |
47d4e709 | 1774 | ("[Mm]akefile\\'" . makefile-gmake-mode))) |
27a7c83f DP |
1775 | ("Makeppfile\\'" . makefile-makepp-mode) |
1776 | ("\\.am\\'" . makefile-automake-mode) | |
5c6d31a4 SM |
1777 | ;; Less common extensions come here |
1778 | ;; so more common ones above are found faster. | |
ffc0e1ca AS |
1779 | ("\\.texinfo\\'" . texinfo-mode) |
1780 | ("\\.te?xi\\'" . texinfo-mode) | |
bbc67516 | 1781 | ("\\.[sS]\\'" . asm-mode) |
ffc0e1ca | 1782 | ("\\.asm\\'" . asm-mode) |
bbc67516 DP |
1783 | ("[cC]hange\\.?[lL]og?\\'" . change-log-mode) |
1784 | ("[cC]hange[lL]og\\.[0-9]+\\'" . change-log-mode) | |
ffc0e1ca AS |
1785 | ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode) |
1786 | ("\\.scm\\.[0-9]*\\'" . scheme-mode) | |
1787 | ("\\.[ck]?sh\\'\\|\\.shar\\'\\|/\\.z?profile\\'" . sh-mode) | |
b921b596 | 1788 | ("\\.bash\\'" . sh-mode) |
ffc0e1ca AS |
1789 | ("\\(/\\|\\`\\)\\.\\(bash_profile\\|z?login\\|bash_login\\|z?logout\\)\\'" . sh-mode) |
1790 | ("\\(/\\|\\`\\)\\.\\(bash_logout\\|shrc\\|[kz]shrc\\|bashrc\\|t?cshrc\\|esrc\\)\\'" . sh-mode) | |
1791 | ("\\(/\\|\\`\\)\\.\\([kz]shenv\\|xinitrc\\|startxrc\\|xsession\\)\\'" . sh-mode) | |
d5798fa7 | 1792 | ("\\.m?spec\\'" . sh-mode) |
bbc67516 | 1793 | ("\\.m[mes]\\'" . nroff-mode) |
ffc0e1ca | 1794 | ("\\.man\\'" . nroff-mode) |
ffc0e1ca | 1795 | ("\\.sty\\'" . latex-mode) |
bbc67516 | 1796 | ("\\.cl[so]\\'" . latex-mode) ;LaTeX 2e class option |
ffc0e1ca AS |
1797 | ("\\.bbl\\'" . latex-mode) |
1798 | ("\\.bib\\'" . bibtex-mode) | |
1799 | ("\\.sql\\'" . sql-mode) | |
bbc67516 | 1800 | ("\\.m[4c]\\'" . m4-mode) |
9e6f5419 DP |
1801 | ("\\.mf\\'" . metafont-mode) |
1802 | ("\\.mp\\'" . metapost-mode) | |
ffc0e1ca AS |
1803 | ("\\.vhdl?\\'" . vhdl-mode) |
1804 | ("\\.article\\'" . text-mode) | |
1805 | ("\\.letter\\'" . text-mode) | |
bbc67516 | 1806 | ("\\.i?tcl\\'" . tcl-mode) |
ffc0e1ca | 1807 | ("\\.exp\\'" . tcl-mode) |
ffc0e1ca AS |
1808 | ("\\.itk\\'" . tcl-mode) |
1809 | ("\\.icn\\'" . icon-mode) | |
1810 | ("\\.sim\\'" . simula-mode) | |
1811 | ("\\.mss\\'" . scribe-mode) | |
bbc67516 | 1812 | ("\\.f9[05]\\'" . f90-mode) |
8f9495e7 | 1813 | ("\\.indent\\.pro\\'" . fundamental-mode) ; to avoid idlwave-mode |
ffc0e1ca | 1814 | ("\\.pro\\'" . idlwave-mode) |
ffc0e1ca AS |
1815 | ("\\.prolog\\'" . prolog-mode) |
1816 | ("\\.tar\\'" . tar-mode) | |
0ee6e7b7 JL |
1817 | ;; The list of archive file extensions should be in sync with |
1818 | ;; `auto-coding-alist' with `no-conversion' coding system. | |
e084f8c3 EZ |
1819 | ("\\.\\(arc\\|zip\\|lzh\\|zoo\\|[jew]ar\\|xpi\\)\\'" . archive-mode) |
1820 | ("\\.\\(ARC\\|ZIP\\|LZH\\|ZOO\\|[JEW]AR\\|XPI\\)\\'" . archive-mode) | |
c25773c4 | 1821 | ("\\.sx[dmicw]\\'" . archive-mode) ; OpenOffice.org |
ffc0e1ca AS |
1822 | ;; Mailer puts message to be edited in |
1823 | ;; /tmp/Re.... or Message | |
1824 | ("\\`/tmp/Re" . text-mode) | |
1825 | ("/Message[0-9]*\\'" . text-mode) | |
1826 | ("/drafts/[0-9]+\\'" . mh-letter-mode) | |
1827 | ("\\.zone\\'" . zone-mode) | |
1828 | ;; some news reader is reported to use this | |
1829 | ("\\`/tmp/fol/" . text-mode) | |
ffc0e1ca AS |
1830 | ("\\.oak\\'" . scheme-mode) |
1831 | ("\\.sgml?\\'" . sgml-mode) | |
bbc67516 | 1832 | ("\\.x[ms]l\\'" . xml-mode) |
ffc0e1ca AS |
1833 | ("\\.dtd\\'" . sgml-mode) |
1834 | ("\\.ds\\(ss\\)?l\\'" . dsssl-mode) | |
bbc67516 DP |
1835 | ("\\.js\\'" . java-mode) ; javascript-mode would be better |
1836 | ("\\.x[bp]m\\'" . c-mode) | |
709d45e1 KG |
1837 | ;; .emacs or .gnus or .viper following a directory delimiter in |
1838 | ;; Unix, MSDOG or VMS syntax. | |
1839 | ("[]>:/\\]\\..*\\(emacs\\|gnus\\|viper\\)\\'" . emacs-lisp-mode) | |
ffc0e1ca AS |
1840 | ("\\`\\..*emacs\\'" . emacs-lisp-mode) |
1841 | ;; _emacs following a directory delimiter | |
1842 | ;; in MsDos syntax | |
1843 | ("[:/]_emacs\\'" . emacs-lisp-mode) | |
1844 | ("/crontab\\.X*[0-9]+\\'" . shell-script-mode) | |
1845 | ("\\.ml\\'" . lisp-mode) | |
d5798fa7 SM |
1846 | ("\\.\\(asn\\|mib\\|smi\\)\\'" . snmp-mode) |
1847 | ("\\.\\(as\\|mi\\|sm\\)2\\'" . snmpv2-mode) | |
ffc0e1ca | 1848 | ("\\.\\(diffs?\\|patch\\|rej\\)\\'" . diff-mode) |
e854cc22 | 1849 | ("\\.\\(dif\\|pat\\)\\'" . diff-mode) ; for MSDOG |
d5798fa7 | 1850 | ("\\.[eE]?[pP][sS]\\'" . ps-mode) |
e55c4863 | 1851 | ("configure\\.\\(ac\\|in\\)\\'" . autoconf-mode) |
ffc0e1ca AS |
1852 | ("BROWSE\\'" . ebrowse-tree-mode) |
1853 | ("\\.ebrowse\\'" . ebrowse-tree-mode) | |
9ee45b2c | 1854 | ("#\\*mail\\*" . mail-mode) |
80174d35 DP |
1855 | ("\\.g\\'" . antlr-mode) |
1856 | ("\\.ses\\'" . ses-mode) | |
1857 | ("\\.\\(soa\\|zone\\)\\'" . dns-mode) | |
1858 | ("\\.docbook\\'" . sgml-mode) | |
00daa381 | 1859 | ("\\.com\\'" . dcl-mode) |
80174d35 DP |
1860 | ("/config\\.\\(?:bat\\|log\\)\\'" . fundamental-mode) |
1861 | ;; Windows candidates may be opened case sensitively on Unix | |
1862 | ("\\.\\(?:[iI][nN][iI]\\|[lL][sS][tT]\\|[rR][eE][gG]\\|[sS][yY][sS]\\)\\'" . conf-mode) | |
1863 | ("\\.\\(?:desktop\\|la\\)\\'" . conf-unix-mode) | |
08adf84e | 1864 | ("\\.ppd\\'" . conf-ppd-mode) |
80174d35 DP |
1865 | ("java.+\\.conf\\'" . conf-javaprop-mode) |
1866 | ("\\.properties\\(?:\\.[a-zA-Z0-9._-]+\\)?\\'" . conf-javaprop-mode) | |
1867 | ;; *.cf, *.cfg, *.conf, *.config[.local|.de_DE.UTF8|...], */config | |
1868 | ("[/.]c\\(?:on\\)?f\\(?:i?g\\)?\\(?:\\.[a-zA-Z0-9._-]+\\)?\\'" . conf-mode) | |
a35d9075 AS |
1869 | ("\\`/etc/\\(?:DIR_COLORS\\|ethers\\|.?fstab\\|.*hosts\\|lesskey\\|login\\.?de\\(?:fs\\|vperm\\)\\|magic\\|mtab\\|pam\\.d/.*\\|permissions\\(?:\\.d/.+\\)?\\|protocols\\|rpc\\|services\\)\\'" . conf-space-mode) |
1870 | ("\\`/etc/\\(?:acpid?/.+\\|aliases\\(?:\\.d/.+\\)?\\|default/.+\\|group-?\\|hosts\\..+\\|inittab\\|ksysguarddrc\\|opera6rc\\|passwd-?\\|shadow-?\\|sysconfig/.+\\)\\'" . conf-mode) | |
80174d35 DP |
1871 | ;; either user's dot-files or under /etc or some such |
1872 | ("/\\.?\\(?:gnokiirc\\|kde.*rc\\|mime\\.types\\|wgetrc\\)\\'" . conf-mode) | |
1873 | ;; alas not all ~/.*rc files are like this | |
b14f1885 | 1874 | ("/\\.\\(?:enigma\\|gltron\\|gtk\\|hxplayer\\|net\\|neverball\\|qt/.+\\|realplayer\\|scummvm\\|sversion\\|sylpheed/.+\\|xmp\\)rc\\'" . conf-mode) |
80174d35 DP |
1875 | ("/\\.\\(?:gdbtkinit\\|grip\\|orbital/.+txt\\|rhosts\\|tuxracer/options\\)\\'" . conf-mode) |
1876 | ("/\\.?X\\(?:default\\|resource\\|re\\)s\\>" . conf-xdefaults-mode) | |
1877 | ("/X11.+app-defaults/" . conf-xdefaults-mode) | |
1878 | ("/X11.+locale/.+/Compose\\'" . conf-colon-mode) | |
1879 | ;; this contains everything twice, with space and with colon :-( | |
1880 | ("/X11.+locale/compose\\.dir\\'" . conf-javaprop-mode) | |
9ee45b2c SM |
1881 | ;; Get rid of any trailing .n.m and try again. |
1882 | ;; This is for files saved by cvs-merge that look like .#<file>.<rev> | |
5c6d31a4 SM |
1883 | ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~. |
1884 | ;; Using mode nil rather than `ignore' would let the search continue | |
1885 | ;; through this list (with the shortened name) rather than start over. | |
bbc67516 | 1886 | ("\\.~?[0-9]+\\.[0-9][-.0-9]*~?\\'" nil t) |
5c6d31a4 SM |
1887 | ;; The following should come after the ChangeLog pattern |
1888 | ;; for the sake of ChangeLog.1, etc. | |
1889 | ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too. | |
e043664a | 1890 | ("\\.[1-9]\\'" . nroff-mode) |
80174d35 | 1891 | ("\\.\\(?:orig\\|in\\|[bB][aA][kK]\\)\\'" nil t))) |
ffc0e1ca | 1892 | "Alist of filename patterns vs corresponding major mode functions. |
116987ba RS |
1893 | Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL). |
1894 | \(NON-NIL stands for anything that is not nil; the value does not matter.) | |
1895 | Visiting a file whose name matches REGEXP specifies FUNCTION as the | |
1896 | mode function to use. FUNCTION will be called, unless it is nil. | |
1897 | ||
1898 | If the element has the form (REGEXP FUNCTION NON-NIL), then after | |
1899 | calling FUNCTION (if it's not nil), we delete the suffix that matched | |
969be033 | 1900 | REGEXP and search the list again for another match. |
7b3f3dc2 | 1901 | |
969be033 RS |
1902 | If the file name matches `inhibit-first-line-modes-regexps', |
1903 | then `auto-mode-alist' is not processed. | |
1904 | ||
1905 | See also `interpreter-mode-alist', which detects executable script modes | |
1906 | based on the interpreters they specify to run, | |
1907 | and `magic-mode-alist', which determines modes based on file contents.") | |
e13322a0 | 1908 | |
d7fa5aa2 | 1909 | (defvar interpreter-mode-alist |
f209c999 MS |
1910 | ;; Note: The entries for the modes defined in cc-mode.el (awk-mode |
1911 | ;; and pike-mode) are added through autoload directives in that | |
1912 | ;; file. That way is discouraged since it spreads out the | |
1913 | ;; definition of the initial value. | |
ffc0e1ca AS |
1914 | (mapc |
1915 | (lambda (l) | |
1916 | (cons (purecopy (car l)) (cdr l))) | |
1917 | '(("perl" . perl-mode) | |
1918 | ("perl5" . perl-mode) | |
1919 | ("miniperl" . perl-mode) | |
1920 | ("wish" . tcl-mode) | |
1921 | ("wishx" . tcl-mode) | |
1922 | ("tcl" . tcl-mode) | |
1923 | ("tclsh" . tcl-mode) | |
ffc0e1ca AS |
1924 | ("scm" . scheme-mode) |
1925 | ("ash" . sh-mode) | |
1926 | ("bash" . sh-mode) | |
1927 | ("bash2" . sh-mode) | |
1928 | ("csh" . sh-mode) | |
1929 | ("dtksh" . sh-mode) | |
1930 | ("es" . sh-mode) | |
1931 | ("itcsh" . sh-mode) | |
1932 | ("jsh" . sh-mode) | |
1933 | ("ksh" . sh-mode) | |
1934 | ("oash" . sh-mode) | |
1935 | ("pdksh" . sh-mode) | |
1936 | ("rc" . sh-mode) | |
1937 | ("rpm" . sh-mode) | |
1938 | ("sh" . sh-mode) | |
1939 | ("sh5" . sh-mode) | |
1940 | ("tcsh" . sh-mode) | |
1941 | ("wksh" . sh-mode) | |
1942 | ("wsh" . sh-mode) | |
1943 | ("zsh" . sh-mode) | |
1944 | ("tail" . text-mode) | |
1945 | ("more" . text-mode) | |
1946 | ("less" . text-mode) | |
1947 | ("pg" . text-mode) | |
27a7c83f | 1948 | ("make" . makefile-gmake-mode) ; Debian uses this |
ffc0e1ca AS |
1949 | ("guile" . scheme-mode) |
1950 | ("clisp" . lisp-mode))) | |
c907d156 | 1951 | "Alist mapping interpreter names to major modes. |
969be033 | 1952 | This is used for files whose first lines match `auto-mode-interpreter-regexp'. |
c907d156 | 1953 | Each element looks like (INTERPRETER . MODE). |
54005870 | 1954 | The car of each element, a regular expression, is compared with |
c907d156 | 1955 | the name of the interpreter specified in the first line. |
969be033 RS |
1956 | If it matches, mode MODE is selected. |
1957 | ||
1958 | See also `auto-mode-alist'.") | |
c907d156 | 1959 | |
d7fa5aa2 | 1960 | (defvar inhibit-first-line-modes-regexps '("\\.tar\\'" "\\.tgz\\'") |
45fb3bb8 | 1961 | "List of regexps; if one matches a file name, don't look for `-*-'.") |
a0c9f21b | 1962 | |
d7fa5aa2 | 1963 | (defvar inhibit-first-line-modes-suffixes nil |
b20ff6d0 RS |
1964 | "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'. |
1965 | When checking `inhibit-first-line-modes-regexps', we first discard | |
1966 | from the end of the file name anything that matches one of these regexps.") | |
1967 | ||
ffc0e1ca AS |
1968 | (defvar auto-mode-interpreter-regexp |
1969 | "#![ \t]?\\([^ \t\n]*\ | |
1970 | /bin/env[ \t]\\)?\\([^ \t\n]+\\)" | |
54005870 | 1971 | "Regexp matching interpreters, for file mode determination. |
ffc0e1ca | 1972 | This regular expression is matched against the first line of a file |
54005870 LT |
1973 | to determine the file's mode in `set-auto-mode'. If it matches, the file |
1974 | is assumed to be interpreted by the interpreter matched by the second group | |
1975 | of the regular expression. The mode is then determined as the mode | |
1976 | associated with that interpreter in `interpreter-mode-alist'.") | |
0720b68b | 1977 | |
4ac1d37a | 1978 | (defvar magic-mode-alist |
32a0479a | 1979 | `(;; The < comes before the groups (but the first) to reduce backtracking. |
4ac1d37a | 1980 | ;; TODO: UTF-16 <?xml may be preceded by a BOM 0xff 0xfe or 0xfe 0xff. |
32a0479a SM |
1981 | (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)") |
1982 | (comment-re (concat "\\(?:!--" incomment-re "*-->\\s *<\\)"))) | |
1983 | (concat "\\(?:<\\?xml\\s +[^>]*>\\)?\\s *<" | |
1984 | comment-re "*" | |
1985 | "\\(?:!DOCTYPE\\s +[^>]*>\\s *<\\s *" comment-re "*\\)?" | |
969be033 RS |
1986 | "[Hh][Tt][Mm][Ll]")) |
1987 | . html-mode) | |
4ac1d37a DP |
1988 | ;; These two must come after html, because they are more general: |
1989 | ("<\\?xml " . xml-mode) | |
811cab86 JL |
1990 | (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)") |
1991 | (comment-re (concat "\\(?:!--" incomment-re "*-->\\s *<\\)"))) | |
969be033 RS |
1992 | (concat "\\s *<" comment-re "*!DOCTYPE ")) |
1993 | . sgml-mode) | |
80174d35 DP |
1994 | ("%![^V]" . ps-mode) |
1995 | ("# xmcd " . conf-unix-mode)) | |
1996 | "Alist of buffer beginnings vs. corresponding major mode functions. | |
44dce0fb RS |
1997 | Each element looks like (REGEXP . FUNCTION). After visiting a file, |
1998 | if REGEXP matches the text at the beginning of the buffer, | |
1999 | `normal-mode' will call FUNCTION rather than allowing `auto-mode-alist' | |
2000 | to decide the buffer's major mode. | |
2001 | ||
2002 | If FUNCTION is nil, then it is not called. (That is a way of saying | |
0fc205c6 | 2003 | \"allow `auto-mode-alist' to decide for these files.)") |
bbc67516 | 2004 | |
9e6f5419 | 2005 | (defun set-auto-mode (&optional keep-mode-if-same) |
b4da00e9 | 2006 | "Select major mode appropriate for current buffer. |
4ac1d37a | 2007 | |
bbc67516 DP |
2008 | This checks for a -*- mode tag in the buffer's text, checks the |
2009 | interpreter that runs this file against `interpreter-mode-alist', | |
811cab86 JL |
2010 | compares the buffer beginning against `magic-mode-alist', or |
2011 | compares the filename against the entries in `auto-mode-alist'. | |
e3998da1 RS |
2012 | |
2013 | It does not check for the `mode:' local variable in the | |
2014 | Local Variables section of the file; for that, use `hack-local-variables'. | |
7b3f3dc2 | 2015 | |
f3e23606 | 2016 | If `enable-local-variables' is nil, this function does not check for a |
9de9b6a2 RS |
2017 | -*- mode tag. |
2018 | ||
521cf174 DP |
2019 | If the optional argument KEEP-MODE-IF-SAME is non-nil, then we |
2020 | only set the major mode, if that would change it." | |
b4da00e9 | 2021 | ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- |
811cab86 | 2022 | (let (end done mode modes) |
9e6f5419 DP |
2023 | ;; Find a -*- mode tag |
2024 | (save-excursion | |
2025 | (goto-char (point-min)) | |
2026 | (skip-chars-forward " \t\n") | |
9e6f5419 DP |
2027 | (and enable-local-variables |
2028 | (setq end (set-auto-mode-1)) | |
2029 | (if (save-excursion (search-forward ":" end t)) | |
2030 | ;; Find all specifications for the `mode:' variable | |
2031 | ;; and execute them left to right. | |
2032 | (while (let ((case-fold-search t)) | |
2033 | (or (and (looking-at "mode:") | |
2034 | (goto-char (match-end 0))) | |
2035 | (re-search-forward "[ \t;]mode:" end t))) | |
2036 | (skip-chars-forward " \t") | |
2037 | (let ((beg (point))) | |
2038 | (if (search-forward ";" end t) | |
2039 | (forward-char -1) | |
2040 | (goto-char end)) | |
2041 | (skip-chars-backward " \t") | |
2042 | (push (intern (concat (downcase (buffer-substring beg (point))) "-mode")) | |
2043 | modes))) | |
2044 | ;; Simple -*-MODE-*- case. | |
2045 | (push (intern (concat (downcase (buffer-substring (point) end)) | |
2046 | "-mode")) | |
2047 | modes)))) | |
2048 | ;; If we found modes to use, invoke them now, outside the save-excursion. | |
2049 | (if modes | |
521cf174 DP |
2050 | (catch 'nop |
2051 | (dolist (mode (nreverse modes)) | |
2052 | (if (not (functionp mode)) | |
2053 | (message "Ignoring unknown mode `%s'" mode) | |
2054 | (setq done t) | |
3467488e | 2055 | (or (set-auto-mode-0 mode keep-mode-if-same) |
df4d0613 | 2056 | ;; continuing would call minor modes again, toggling them off |
8a9cdb8d | 2057 | (throw 'nop nil))))) |
9e6f5419 DP |
2058 | ;; If we didn't, look for an interpreter specified in the first line. |
2059 | ;; As a special case, allow for things like "#!/bin/env perl", which | |
2060 | ;; finds the interpreter anywhere in $PATH. | |
2061 | (setq mode (save-excursion | |
2062 | (goto-char (point-min)) | |
2063 | (if (looking-at auto-mode-interpreter-regexp) | |
2064 | (match-string 2) | |
2065 | "")) | |
2066 | ;; Map interpreter name to a mode, signalling we're done at the | |
2067 | ;; same time. | |
2068 | done (assoc (file-name-nondirectory mode) | |
df4d0613 | 2069 | interpreter-mode-alist)) |
811cab86 | 2070 | ;; If we found an interpreter mode to use, invoke it now. |
df4d0613 DP |
2071 | (if done |
2072 | (set-auto-mode-0 (cdr done) keep-mode-if-same))) | |
811cab86 | 2073 | ;; If we didn't, match the buffer beginning against magic-mode-alist. |
df4d0613 | 2074 | (unless done |
4ac1d37a DP |
2075 | (if (setq done (save-excursion |
2076 | (goto-char (point-min)) | |
2077 | (assoc-default nil magic-mode-alist | |
2078 | (lambda (re dummy) | |
2079 | (looking-at re))))) | |
2080 | (set-auto-mode-0 done keep-mode-if-same) | |
811cab86 | 2081 | ;; Compare the filename against the entries in auto-mode-alist. |
4ac1d37a DP |
2082 | (if buffer-file-name |
2083 | (let ((name buffer-file-name)) | |
2084 | ;; Remove backup-suffixes from file name. | |
2085 | (setq name (file-name-sans-versions name)) | |
2086 | (while name | |
2087 | ;; Find first matching alist entry. | |
2088 | (let ((case-fold-search | |
2089 | (memq system-type '(vax-vms windows-nt cygwin)))) | |
2090 | (if (and (setq mode (assoc-default name auto-mode-alist | |
811cab86 | 2091 | 'string-match)) |
4ac1d37a DP |
2092 | (consp mode) |
2093 | (cadr mode)) | |
2094 | (setq mode (car mode) | |
2095 | name (substring name 0 (match-beginning 0))) | |
2096 | (setq name))) | |
2097 | (when mode | |
2098 | (set-auto-mode-0 mode keep-mode-if-same))))))))) | |
521cf174 | 2099 | |
521cf174 DP |
2100 | ;; When `keep-mode-if-same' is set, we are working on behalf of |
2101 | ;; set-visited-file-name. In that case, if the major mode specified is the | |
2102 | ;; same one we already have, don't actually reset it. We don't want to lose | |
2103 | ;; minor modes such as Font Lock. | |
3467488e | 2104 | (defun set-auto-mode-0 (mode &optional keep-mode-if-same) |
521cf174 | 2105 | "Apply MODE and return it. |
3467488e KS |
2106 | If optional arg KEEP-MODE-IF-SAME is non-nil, MODE is chased of |
2107 | any aliases and compared to current major mode. If they are the | |
2108 | same, do nothing and return nil." | |
521cf174 DP |
2109 | (when keep-mode-if-same |
2110 | (while (symbolp (symbol-function mode)) | |
2111 | (setq mode (symbol-function mode))) | |
2112 | (if (eq mode major-mode) | |
3467488e | 2113 | (setq mode nil))) |
521cf174 DP |
2114 | (when mode |
2115 | (funcall mode) | |
2116 | mode)) | |
b4da00e9 | 2117 | |
e3f9b9c0 RS |
2118 | (defun set-auto-mode-1 () |
2119 | "Find the -*- spec in the buffer. | |
2120 | Call with point at the place to start searching from. | |
2121 | If one is found, set point to the beginning | |
2122 | and return the position of the end. | |
2123 | Otherwise, return nil; point may be changed." | |
2124 | (let (beg end) | |
2125 | (and | |
2126 | ;; Don't look for -*- if this file name matches any | |
2127 | ;; of the regexps in inhibit-first-line-modes-regexps. | |
2128 | (let ((temp inhibit-first-line-modes-regexps) | |
2129 | (name (if buffer-file-name | |
2130 | (file-name-sans-versions buffer-file-name) | |
2131 | (buffer-name)))) | |
2132 | (while (let ((sufs inhibit-first-line-modes-suffixes)) | |
2133 | (while (and sufs (not (string-match (car sufs) name))) | |
2134 | (setq sufs (cdr sufs))) | |
2135 | sufs) | |
2136 | (setq name (substring name 0 (match-beginning 0)))) | |
2137 | (while (and temp | |
2138 | (not (string-match (car temp) name))) | |
2139 | (setq temp (cdr temp))) | |
2140 | (not temp)) | |
2141 | ||
f587e30b SM |
2142 | (search-forward "-*-" (line-end-position |
2143 | ;; If the file begins with "#!" | |
2144 | ;; (exec interpreter magic), look | |
2145 | ;; for mode frobs in the first two | |
2146 | ;; lines. You cannot necessarily | |
2147 | ;; put them in the first line of | |
2148 | ;; such a file without screwing up | |
2149 | ;; the interpreter invocation. | |
2150 | (and (looking-at "^#!") 2)) t) | |
e3f9b9c0 RS |
2151 | (progn |
2152 | (skip-chars-forward " \t") | |
2153 | (setq beg (point)) | |
f587e30b | 2154 | (search-forward "-*-" (line-end-position) t)) |
e3f9b9c0 RS |
2155 | (progn |
2156 | (forward-char -3) | |
2157 | (skip-chars-backward " \t") | |
2158 | (setq end (point)) | |
2159 | (goto-char beg) | |
2160 | end)))) | |
2161 | ||
e6ca43c8 RS |
2162 | (defun hack-local-variables-confirm (string flag-to-check) |
2163 | (or (eq flag-to-check t) | |
2164 | (and flag-to-check | |
cc45837e RS |
2165 | (save-window-excursion |
2166 | (condition-case nil | |
2167 | (switch-to-buffer (current-buffer)) | |
2168 | (error | |
2169 | ;; If we fail to switch in the selected window, | |
2170 | ;; it is probably a minibuffer or dedicated window. | |
2171 | ;; So try another window. | |
2172 | (let ((pop-up-frames nil)) | |
2173 | ;; Refrain from popping up frames since it can't | |
2174 | ;; be undone by save-window-excursion. | |
2175 | (pop-to-buffer (current-buffer))))) | |
2176 | (save-excursion | |
2177 | (beginning-of-line) | |
2178 | (set-window-start (selected-window) (point))) | |
56b19636 LT |
2179 | (y-or-n-p (format string |
2180 | (if buffer-file-name | |
2181 | (file-name-nondirectory buffer-file-name) | |
2182 | (concat "buffer " (buffer-name))))))))) | |
cc45837e | 2183 | |
a0e74e72 | 2184 | (defun hack-local-variables-prop-line (&optional mode-only) |
ffc0e1ca AS |
2185 | "Set local variables specified in the -*- line. |
2186 | Ignore any specification for `mode:' and `coding:'; | |
2187 | `set-auto-mode' should already have handled `mode:', | |
a0e74e72 RS |
2188 | `set-auto-coding' should already have handled `coding:'. |
2189 | If MODE-ONLY is non-nil, all we do is check whether the major mode | |
2190 | is specified, returning t if it is specified." | |
f3e23606 RS |
2191 | (save-excursion |
2192 | (goto-char (point-min)) | |
13a66180 | 2193 | (let ((result nil) |
e3f9b9c0 | 2194 | (end (set-auto-mode-1)) |
a0e74e72 | 2195 | mode-specified |
aa5fcebf KH |
2196 | (enable-local-variables |
2197 | (and local-enable-local-variables enable-local-variables))) | |
a0e74e72 RS |
2198 | ;; Parse the -*- line into the RESULT alist. |
2199 | ;; Also set MODE-SPECIFIED if we see a spec or `mode'. | |
e3f9b9c0 | 2200 | (cond ((not end) |
f3e23606 RS |
2201 | nil) |
2202 | ((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)") | |
13a66180 | 2203 | ;; Simple form: "-*- MODENAME -*-". Already handled. |
a0e74e72 | 2204 | (setq mode-specified t) |
13a66180 | 2205 | nil) |
f3e23606 RS |
2206 | (t |
2207 | ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-' | |
2208 | ;; (last ";" is optional). | |
f3e23606 RS |
2209 | (while (< (point) end) |
2210 | (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*") | |
ffc0e1ca | 2211 | (error "Malformed -*- line")) |
f3e23606 | 2212 | (goto-char (match-end 0)) |
1c26a6f3 KH |
2213 | ;; There used to be a downcase here, |
2214 | ;; but the manual didn't say so, | |
2215 | ;; and people want to set var names that aren't all lc. | |
2216 | (let ((key (intern (buffer-substring | |
2217 | (match-beginning 1) | |
2218 | (match-end 1)))) | |
f3e23606 RS |
2219 | (val (save-restriction |
2220 | (narrow-to-region (point) end) | |
2221 | (read (current-buffer))))) | |
93a2702d RS |
2222 | ;; It is traditional to ignore |
2223 | ;; case when checking for `mode' in set-auto-mode, | |
2224 | ;; so we must do that here as well. | |
2225 | ;; That is inconsistent, but we're stuck with it. | |
3fa0a9aa | 2226 | ;; The same can be said for `coding' in set-auto-coding. |
93a2702d | 2227 | (or (equal (downcase (symbol-name key)) "mode") |
3fa0a9aa | 2228 | (equal (downcase (symbol-name key)) "coding") |
13a66180 | 2229 | (setq result (cons (cons key val) result))) |
a0e74e72 RS |
2230 | (if (equal (downcase (symbol-name key)) "mode") |
2231 | (setq mode-specified t)) | |
f3e23606 RS |
2232 | (skip-chars-forward " \t;"))) |
2233 | (setq result (nreverse result)))) | |
76d5492b | 2234 | |
a0e74e72 RS |
2235 | (if mode-only mode-specified |
2236 | (if (and result | |
2237 | (or mode-only | |
56b19636 | 2238 | (hack-local-variables-confirm |
e6ca43c8 RS |
2239 | "Set local variables as specified in -*- line of %s? " |
2240 | enable-local-variables))) | |
a0e74e72 RS |
2241 | (let ((enable-local-eval enable-local-eval)) |
2242 | (while result | |
2243 | (hack-one-local-variable (car (car result)) (cdr (car result))) | |
2244 | (setq result (cdr result))))) | |
2245 | nil)))) | |
f3e23606 | 2246 | |
1d517019 RS |
2247 | (defvar hack-local-variables-hook nil |
2248 | "Normal hook run after processing a file's local variables specs. | |
2249 | Major modes can use this to examine user-specified local variables | |
2250 | in order to initialize other data structure based on them.") | |
2251 | ||
9de9b6a2 RS |
2252 | (defun hack-local-variables (&optional mode-only) |
2253 | "Parse and put into effect this buffer's local variables spec. | |
2254 | If MODE-ONLY is non-nil, all we do is check whether the major mode | |
2255 | is specified, returning t if it is specified." | |
a0e74e72 RS |
2256 | (let ((mode-specified |
2257 | ;; If MODE-ONLY is t, we check here for specifying the mode | |
2258 | ;; in the -*- line. If MODE-ONLY is nil, we process | |
2259 | ;; the -*- line here. | |
2260 | (hack-local-variables-prop-line mode-only)) | |
aa5fcebf KH |
2261 | (enable-local-variables |
2262 | (and local-enable-local-variables enable-local-variables))) | |
a0e74e72 | 2263 | ;; Look for "Local variables:" line in last page. |
9de9b6a2 RS |
2264 | (save-excursion |
2265 | (goto-char (point-max)) | |
2266 | (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) | |
50292b6e SM |
2267 | (when (let ((case-fold-search t)) |
2268 | (and (search-forward "Local Variables:" nil t) | |
cc45837e | 2269 | (or mode-only |
56b19636 | 2270 | (hack-local-variables-confirm |
e6ca43c8 RS |
2271 | "Set local variables as specified at end of %s? " |
2272 | enable-local-variables)))) | |
50292b6e SM |
2273 | (skip-chars-forward " \t") |
2274 | (let ((enable-local-eval enable-local-eval) | |
2275 | ;; suffix is what comes after "local variables:" in its line. | |
2276 | (suffix | |
2277 | (concat | |
2278 | (regexp-quote (buffer-substring (point) (line-end-position))) | |
2279 | "$")) | |
2280 | ;; prefix is what comes before "local variables:" in its line. | |
2281 | (prefix | |
2282 | (concat "^" (regexp-quote | |
2283 | (buffer-substring (line-beginning-position) | |
2284 | (match-beginning 0))))) | |
2285 | beg) | |
2286 | ||
2287 | (forward-line 1) | |
2288 | (let ((startpos (point)) | |
2289 | endpos | |
2290 | (thisbuf (current-buffer))) | |
2291 | (save-excursion | |
5a146628 DP |
2292 | (unless (let ((case-fold-search t)) |
2293 | (re-search-forward | |
2294 | (concat prefix "[ \t]*End:[ \t]*" suffix) | |
2295 | nil t)) | |
2296 | (error "Local variables list is not properly terminated")) | |
50292b6e SM |
2297 | (beginning-of-line) |
2298 | (setq endpos (point))) | |
2299 | ||
2300 | (with-temp-buffer | |
2301 | (insert-buffer-substring thisbuf startpos endpos) | |
2302 | (goto-char (point-min)) | |
2303 | (subst-char-in-region (point) (point-max) ?\^m ?\n) | |
2304 | (while (not (eobp)) | |
2305 | ;; Discard the prefix. | |
2306 | (if (looking-at prefix) | |
2307 | (delete-region (point) (match-end 0)) | |
2308 | (error "Local variables entry is missing the prefix")) | |
2309 | (end-of-line) | |
2310 | ;; Discard the suffix. | |
2311 | (if (looking-back suffix) | |
2312 | (delete-region (match-beginning 0) (point)) | |
2313 | (error "Local variables entry is missing the suffix")) | |
2314 | (forward-line 1)) | |
2315 | (goto-char (point-min)) | |
2316 | ||
2317 | (while (not (eobp)) | |
2318 | ;; Find the variable name; strip whitespace. | |
2319 | (skip-chars-forward " \t") | |
2320 | (setq beg (point)) | |
2321 | (skip-chars-forward "^:\n") | |
2322 | (if (eolp) (error "Missing colon in local variables entry")) | |
2323 | (skip-chars-backward " \t") | |
2324 | (let* ((str (buffer-substring beg (point))) | |
2325 | (var (read str)) | |
2326 | val) | |
2327 | ;; Read the variable value. | |
2328 | (skip-chars-forward "^:") | |
2329 | (forward-char 1) | |
2330 | (setq val (read (current-buffer))) | |
2331 | (if mode-only | |
2332 | (if (eq var 'mode) | |
2333 | (setq mode-specified t)) | |
2334 | ;; Set the variable. "Variables" mode and eval are funny. | |
2335 | (with-current-buffer thisbuf | |
2336 | (hack-one-local-variable var val)))) | |
2337 | (forward-line 1))))))) | |
9de9b6a2 RS |
2338 | (unless mode-only |
2339 | (run-hooks 'hack-local-variables-hook)) | |
2340 | mode-specified)) | |
f3e23606 | 2341 | |
e0b2a2d9 | 2342 | (defvar ignored-local-variables () |
f3e23606 RS |
2343 | "Variables to be ignored in a file's local variable spec.") |
2344 | ||
be0218a8 | 2345 | ;; Get confirmation before setting these variables as locals in a file. |
05ef1cda | 2346 | (put 'debugger 'risky-local-variable t) |
f6fa3ee3 | 2347 | (put 'enable-local-eval 'risky-local-variable t) |
fce47eea | 2348 | (put 'ignored-local-variables 'risky-local-variable t) |
be0218a8 RS |
2349 | (put 'eval 'risky-local-variable t) |
2350 | (put 'file-name-handler-alist 'risky-local-variable t) | |
7ed9159a | 2351 | (put 'inhibit-quit 'risky-local-variable t) |
7078d9d2 | 2352 | (put 'minor-mode-alist 'risky-local-variable t) |
be0218a8 | 2353 | (put 'minor-mode-map-alist 'risky-local-variable t) |
7078d9d2 RS |
2354 | (put 'minor-mode-overriding-map-alist 'risky-local-variable t) |
2355 | (put 'overriding-local-map 'risky-local-variable t) | |
2356 | (put 'overriding-terminal-local-map 'risky-local-variable t) | |
2357 | (put 'auto-mode-alist 'risky-local-variable t) | |
be0218a8 | 2358 | (put 'after-load-alist 'risky-local-variable t) |
f6fa3ee3 | 2359 | (put 'buffer-file-name 'risky-local-variable t) |
7078d9d2 | 2360 | (put 'buffer-undo-list 'risky-local-variable t) |
f6fa3ee3 RS |
2361 | (put 'buffer-auto-save-file-name 'risky-local-variable t) |
2362 | (put 'buffer-file-truename 'risky-local-variable t) | |
7078d9d2 | 2363 | (put 'default-text-properties 'risky-local-variable t) |
b0ffcc0d RS |
2364 | (put 'exec-path 'risky-local-variable t) |
2365 | (put 'load-path 'risky-local-variable t) | |
2366 | (put 'exec-directory 'risky-local-variable t) | |
2367 | (put 'process-environment 'risky-local-variable t) | |
eba1c87a RS |
2368 | (put 'dabbrev-case-fold-search 'risky-local-variable t) |
2369 | (put 'dabbrev-case-replace 'risky-local-variable t) | |
9afa8bf7 RS |
2370 | ;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode. |
2371 | (put 'outline-level 'risky-local-variable t) | |
d98b741d | 2372 | (put 'rmail-output-file-alist 'risky-local-variable t) |
f4d04672 | 2373 | (put 'font-lock-defaults 'risky-local-variable t) |
7078d9d2 RS |
2374 | (put 'special-display-buffer-names 'risky-local-variable t) |
2375 | (put 'frame-title-format 'risky-local-variable t) | |
2376 | (put 'global-mode-string 'risky-local-variable t) | |
2377 | (put 'header-line-format 'risky-local-variable t) | |
2378 | (put 'icon-title-format 'risky-local-variable t) | |
2379 | (put 'input-method-alist 'risky-local-variable t) | |
032388f3 | 2380 | (put 'format-alist 'risky-local-variable t) |
7078d9d2 RS |
2381 | (put 'vc-mode 'risky-local-variable t) |
2382 | (put 'imenu-generic-expression 'risky-local-variable t) | |
cfdd394e | 2383 | (put 'imenu--index-alist 'risky-local-variable t) |
7078d9d2 RS |
2384 | (put 'standard-input 'risky-local-variable t) |
2385 | (put 'standard-output 'risky-local-variable t) | |
2386 | (put 'unread-command-events 'risky-local-variable t) | |
2387 | (put 'max-lisp-eval-depth 'risky-local-variable t) | |
2388 | (put 'max-specpdl-size 'risky-local-variable t) | |
ec4ba9e3 RS |
2389 | (put 'mode-line-format 'risky-local-variable t) |
2390 | (put 'mode-line-modified 'risky-local-variable t) | |
2391 | (put 'mode-line-mule-info 'risky-local-variable t) | |
2392 | (put 'mode-line-buffer-identification 'risky-local-variable t) | |
2393 | (put 'mode-line-modes 'risky-local-variable t) | |
2394 | (put 'mode-line-position 'risky-local-variable t) | |
b459083c | 2395 | (put 'mode-line-process 'risky-local-variable t) |
fbafc3bd | 2396 | (put 'mode-name 'risky-local-variable t) |
2bbbe4f6 | 2397 | (put 'display-time-string 'risky-local-variable t) |
fecddd0d | 2398 | (put 'parse-time-rules 'risky-local-variable t) |
f6fa3ee3 | 2399 | |
472514b7 RS |
2400 | ;; This case is safe because the user gets to check it before it is used. |
2401 | (put 'compile-command 'safe-local-variable 'stringp) | |
2402 | ||
40ebe9bd | 2403 | (defun risky-local-variable-p (sym &optional val) |
0d8781d8 | 2404 | "Non-nil if SYM could be dangerous as a file-local variable with value VAL. |
40ebe9bd LT |
2405 | If VAL is nil or omitted, the question is whether any value might be |
2406 | dangerous." | |
472514b7 | 2407 | (let ((safep (get sym 'safe-local-variable))) |
e0b2a2d9 | 2408 | (or (get sym 'risky-local-variable) |
472514b7 RS |
2409 | (and (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$\\|-predicate$\\|font-lock-keywords$\\|font-lock-keywords-[0-9]+$\\|font-lock-syntactic-keywords$\\|-frame-alist$\\|-mode-alist$\\|-map$\\|-map-alist$" |
2410 | (symbol-name sym)) | |
2411 | (not safep)) | |
2412 | ;; If the safe-local-variable property isn't t or nil, | |
2413 | ;; then it must return non-nil on the proposed value to be safe. | |
2414 | (and (not (memq safep '(t nil))) | |
0d8781d8 RS |
2415 | (or (null val) |
2416 | (not (funcall safep val))))))) | |
7ed9159a | 2417 | |
8fd9c174 RS |
2418 | (defcustom safe-local-eval-forms nil |
2419 | "*Expressions that are considered \"safe\" in an `eval:' local variable. | |
2420 | Add expressions to this list if you want Emacs to evaluate them, when | |
2421 | they appear in an `eval' local variable specification, without first | |
2422 | asking you for confirmation." | |
2423 | :group 'find-file | |
bf247b6e | 2424 | :version "22.1" |
8fd9c174 RS |
2425 | :type '(repeat sexp)) |
2426 | ||
ff7affeb RS |
2427 | (put 'c-set-style 'safe-local-eval-function t) |
2428 | ||
d0bd3513 RS |
2429 | (defun hack-one-local-variable-quotep (exp) |
2430 | (and (consp exp) (eq (car exp) 'quote) (consp (cdr exp)))) | |
2431 | ||
ff7affeb RS |
2432 | (defun hack-one-local-variable-constantp (exp) |
2433 | (or (and (not (symbolp exp)) (not (consp exp))) | |
2434 | (memq exp '(t nil)) | |
2435 | (keywordp exp) | |
2436 | (hack-one-local-variable-quotep exp))) | |
2437 | ||
2438 | (defun hack-one-local-variable-eval-safep (exp) | |
2439 | "Return t if it is safe to eval EXP when it is found in a file." | |
8fd9c174 RS |
2440 | (or (not (consp exp)) |
2441 | ;; Detect certain `put' expressions. | |
2442 | (and (eq (car exp) 'put) | |
2443 | (hack-one-local-variable-quotep (nth 1 exp)) | |
2444 | (hack-one-local-variable-quotep (nth 2 exp)) | |
2445 | (memq (nth 1 (nth 2 exp)) | |
2446 | '(lisp-indent-hook)) | |
2447 | ;; Only allow safe values of lisp-indent-hook; | |
2448 | ;; not functions. | |
2449 | (or (numberp (nth 3 exp)) | |
2450 | (equal (nth 3 exp) ''defun))) | |
2451 | ;; Allow expressions that the user requested. | |
2452 | (member exp safe-local-eval-forms) | |
2453 | ;; Certain functions can be allowed with safe arguments | |
2454 | ;; or can specify verification functions to try. | |
2455 | (and (symbolp (car exp)) | |
2456 | (let ((prop (get (car exp) 'safe-local-eval-function))) | |
2457 | (cond ((eq prop t) | |
2458 | (let ((ok t)) | |
2459 | (dolist (arg (cdr exp)) | |
2460 | (unless (hack-one-local-variable-constantp arg) | |
2461 | (setq ok nil))) | |
2462 | ok)) | |
2463 | ((functionp prop) | |
2464 | (funcall prop exp)) | |
2465 | ((listp prop) | |
2466 | (let ((ok nil)) | |
2467 | (dolist (function prop) | |
2468 | (if (funcall function exp) | |
2469 | (setq ok t))) | |
2470 | ok))))))) | |
ff7affeb | 2471 | |
f3e23606 | 2472 | (defun hack-one-local-variable (var val) |
ffc0e1ca | 2473 | "\"Set\" one variable in a local variables spec. |
7078d9d2 RS |
2474 | A few patterns are specified so that any name which matches one |
2475 | is considered risky." | |
f3e23606 RS |
2476 | (cond ((eq var 'mode) |
2477 | (funcall (intern (concat (downcase (symbol-name val)) | |
2478 | "-mode")))) | |
3fa0a9aa KH |
2479 | ((eq var 'coding) |
2480 | ;; We have already handled coding: tag in set-auto-coding. | |
2481 | nil) | |
e0b2a2d9 RS |
2482 | ((memq var ignored-local-variables) |
2483 | nil) | |
f3e23606 | 2484 | ;; "Setting" eval means either eval it or do nothing. |
7d3221d7 | 2485 | ;; Likewise for setting hook variables. |
472514b7 | 2486 | ((risky-local-variable-p var val) |
0225ae5e | 2487 | ;; Permit evalling a put of a harmless property. |
d0bd3513 RS |
2488 | ;; if the args do nothing tricky. |
2489 | (if (or (and (eq var 'eval) | |
ff7affeb | 2490 | (hack-one-local-variable-eval-safep val)) |
d0bd3513 | 2491 | ;; Permit eval if not root and user says ok. |
c7e62660 | 2492 | (and (not (zerop (user-uid))) |
56b19636 | 2493 | (hack-local-variables-confirm |
e6ca43c8 RS |
2494 | "Process `eval' or hook local variables in %s? " |
2495 | enable-local-eval))) | |
7d3221d7 RS |
2496 | (if (eq var 'eval) |
2497 | (save-excursion (eval val)) | |
2498 | (make-local-variable var) | |
2499 | (set var val)) | |
472514b7 | 2500 | (message "Ignoring risky spec in the local variables list"))) |
f3e23606 RS |
2501 | ;; Ordinary variable, really set it. |
2502 | (t (make-local-variable var) | |
87a6a5d8 RS |
2503 | ;; Make sure the string has no text properties. |
2504 | ;; Some text properties can get evaluated in various ways, | |
2505 | ;; so it is risky to put them on with a local variable list. | |
2506 | (if (stringp val) | |
2507 | (set-text-properties 0 (length val) nil val)) | |
f3e23606 RS |
2508 | (set var val)))) |
2509 | ||
b4da00e9 | 2510 | \f |
21540597 | 2511 | (defcustom change-major-mode-with-file-name t |
9de9b6a2 RS |
2512 | "*Non-nil means \\[write-file] should set the major mode from the file name. |
2513 | However, the mode will not be changed if | |
2514 | \(1) a local variables list or the `-*-' line specifies a major mode, or | |
2515 | \(2) the current major mode is a \"special\" mode, | |
8609911b | 2516 | \ not suitable for ordinary files, or |
21540597 RS |
2517 | \(3) the new file name does not particularly specify any mode." |
2518 | :type 'boolean | |
2519 | :group 'editing-basics) | |
9de9b6a2 | 2520 | |
f36012a6 | 2521 | (defun set-visited-file-name (filename &optional no-query along-with-file) |
b4da00e9 RM |
2522 | "Change name of file visited in current buffer to FILENAME. |
2523 | The next time the buffer is saved it will go in the newly specified file. | |
814af837 | 2524 | FILENAME nil or an empty string means make buffer not be visiting any file. |
b4da00e9 | 2525 | Remember to delete the initial contents of the minibuffer |
6a6b62f8 RS |
2526 | if you wish to pass an empty string as the argument. |
2527 | ||
2528 | The optional second argument NO-QUERY, if non-nil, inhibits asking for | |
f36012a6 RS |
2529 | confirmation in the case where another buffer is already visiting FILENAME. |
2530 | ||
2531 | The optional third argument ALONG-WITH-FILE, if non-nil, means that | |
2532 | the old visited file has been renamed to the new name FILENAME." | |
b4da00e9 | 2533 | (interactive "FSet visited file name: ") |
c11a94fe RS |
2534 | (if (buffer-base-buffer) |
2535 | (error "An indirect buffer cannot visit a file")) | |
a522e5bf RS |
2536 | (let (truename) |
2537 | (if filename | |
2538 | (setq filename | |
2539 | (if (string-equal filename "") | |
2540 | nil | |
2541 | (expand-file-name filename)))) | |
2542 | (if filename | |
2543 | (progn | |
2544 | (setq truename (file-truename filename)) | |
2545 | (if find-file-visit-truename | |
a522e5bf | 2546 | (setq filename truename)))) |
cbca0a4b RS |
2547 | (if filename |
2548 | (let ((new-name (file-name-nondirectory buffer-file-name))) | |
2549 | (if (string= new-name "") | |
2550 | (error "Empty file name")))) | |
11e314fa | 2551 | (let ((buffer (and filename (find-buffer-visiting filename)))) |
7b89d38e | 2552 | (and buffer (not (eq buffer (current-buffer))) |
6a6b62f8 | 2553 | (not no-query) |
7b89d38e RS |
2554 | (not (y-or-n-p (message "A buffer is visiting %s; proceed? " |
2555 | filename))) | |
2556 | (error "Aborted"))) | |
a522e5bf RS |
2557 | (or (equal filename buffer-file-name) |
2558 | (progn | |
2559 | (and filename (lock-buffer filename)) | |
2560 | (unlock-buffer))) | |
2561 | (setq buffer-file-name filename) | |
2562 | (if filename ; make buffer name reflect filename. | |
2563 | (let ((new-name (file-name-nondirectory buffer-file-name))) | |
a522e5bf RS |
2564 | (if (eq system-type 'vax-vms) |
2565 | (setq new-name (downcase new-name))) | |
2566 | (setq default-directory (file-name-directory buffer-file-name)) | |
67b6fd1c SM |
2567 | ;; If new-name == old-name, renaming would add a spurious <2> |
2568 | ;; and it's considered as a feature in rename-buffer. | |
a522e5bf RS |
2569 | (or (string= new-name (buffer-name)) |
2570 | (rename-buffer new-name t)))) | |
2571 | (setq buffer-backed-up nil) | |
f36012a6 RS |
2572 | (or along-with-file |
2573 | (clear-visited-file-modtime)) | |
8ccdc29e | 2574 | ;; Abbreviate the file names of the buffer. |
4826e97f | 2575 | (if truename |
8ccdc29e RS |
2576 | (progn |
2577 | (setq buffer-file-truename (abbreviate-file-name truename)) | |
2578 | (if find-file-visit-truename | |
b1f1ceb8 | 2579 | (setq buffer-file-name truename)))) |
a522e5bf RS |
2580 | (setq buffer-file-number |
2581 | (if filename | |
2a47b4f5 | 2582 | (nthcdr 10 (file-attributes buffer-file-name)) |
a522e5bf | 2583 | nil))) |
0370fe77 | 2584 | ;; write-file-functions is normally used for things like ftp-find-file |
b4da00e9 RM |
2585 | ;; that visit things that are not local files as if they were files. |
2586 | ;; Changing to visit an ordinary local file instead should flush the hook. | |
0370fe77 | 2587 | (kill-local-variable 'write-file-functions) |
c9dca4e0 | 2588 | (kill-local-variable 'local-write-file-hooks) |
b4da00e9 RM |
2589 | (kill-local-variable 'revert-buffer-function) |
2590 | (kill-local-variable 'backup-inhibited) | |
ee81c959 RS |
2591 | ;; If buffer was read-only because of version control, |
2592 | ;; that reason is gone now, so make it writable. | |
2593 | (if vc-mode | |
2594 | (setq buffer-read-only nil)) | |
2595 | (kill-local-variable 'vc-mode) | |
b4da00e9 RM |
2596 | ;; Turn off backup files for certain file names. |
2597 | ;; Since this is a permanent local, the major mode won't eliminate it. | |
4d49551a KH |
2598 | (and buffer-file-name |
2599 | (not (funcall backup-enable-predicate buffer-file-name)) | |
b4da00e9 RM |
2600 | (progn |
2601 | (make-local-variable 'backup-inhibited) | |
2602 | (setq backup-inhibited t))) | |
c77a81cf RS |
2603 | (let ((oauto buffer-auto-save-file-name)) |
2604 | ;; If auto-save was not already on, turn it on if appropriate. | |
2605 | (if (not buffer-auto-save-file-name) | |
2606 | (and buffer-file-name auto-save-default | |
2607 | (auto-save-mode t)) | |
2608 | ;; If auto save is on, start using a new name. | |
2609 | ;; We deliberately don't rename or delete the old auto save | |
2610 | ;; for the old visited file name. This is because perhaps | |
2611 | ;; the user wants to save the new state and then compare with the | |
2612 | ;; previous state from the auto save file. | |
2613 | (setq buffer-auto-save-file-name | |
2614 | (make-auto-save-file-name))) | |
2615 | ;; Rename the old auto save file if any. | |
2616 | (and oauto buffer-auto-save-file-name | |
e6f0e76c | 2617 | (file-exists-p oauto) |
c77a81cf | 2618 | (rename-file oauto buffer-auto-save-file-name t))) |
f36012a6 RS |
2619 | (and buffer-file-name |
2620 | (not along-with-file) | |
9de9b6a2 RS |
2621 | (set-buffer-modified-p t)) |
2622 | ;; Update the major mode, if the file name determines it. | |
2623 | (condition-case nil | |
2624 | ;; Don't change the mode if it is special. | |
2625 | (or (not change-major-mode-with-file-name) | |
2626 | (get major-mode 'mode-class) | |
2627 | ;; Don't change the mode if the local variable list specifies it. | |
2628 | (hack-local-variables t) | |
2629 | (set-auto-mode t)) | |
2630 | (error nil))) | |
b4da00e9 | 2631 | |
912192d1 | 2632 | (defun write-file (filename &optional confirm) |
b4da00e9 | 2633 | "Write current buffer into file FILENAME. |
7f99999a | 2634 | This makes the buffer visit that file, and marks it as not modified. |
7458cc35 | 2635 | |
7f99999a KH |
2636 | If you specify just a directory name as FILENAME, that means to use |
2637 | the default file name but in that directory. You can also yank | |
074eb6ac | 2638 | the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element]. |
7f99999a KH |
2639 | |
2640 | If the buffer is not already visiting a file, the default file name | |
2641 | for the output file is the buffer name. | |
2642 | ||
2643 | If optional second arg CONFIRM is non-nil, this function | |
2644 | asks for confirmation before overwriting an existing file. | |
912192d1 | 2645 | Interactively, confirmation is required unless you supply a prefix argument." |
b4da00e9 RM |
2646 | ;; (interactive "FWrite file: ") |
2647 | (interactive | |
2648 | (list (if buffer-file-name | |
2649 | (read-file-name "Write file: " | |
2650 | nil nil nil nil) | |
7f99999a KH |
2651 | (read-file-name "Write file: " default-directory |
2652 | (expand-file-name | |
2653 | (file-name-nondirectory (buffer-name)) | |
2654 | default-directory) | |
2655 | nil nil)) | |
912192d1 | 2656 | (not current-prefix-arg))) |
b4da00e9 | 2657 | (or (null filename) (string-equal filename "") |
41f48cb1 RS |
2658 | (progn |
2659 | ;; If arg is just a directory, | |
7f99999a KH |
2660 | ;; use the default file name, but in that directory. |
2661 | (if (file-directory-p filename) | |
41f48cb1 | 2662 | (setq filename (concat (file-name-as-directory filename) |
7f99999a KH |
2663 | (file-name-nondirectory |
2664 | (or buffer-file-name (buffer-name)))))) | |
c2fb8488 RS |
2665 | (and confirm |
2666 | (file-exists-p filename) | |
2667 | (or (y-or-n-p (format "File `%s' exists; overwrite? " filename)) | |
2668 | (error "Canceled"))) | |
5f65549e | 2669 | (set-visited-file-name filename (not confirm)))) |
b4da00e9 | 2670 | (set-buffer-modified-p t) |
6492b55d KH |
2671 | ;; Make buffer writable if file is writable. |
2672 | (and buffer-file-name | |
2673 | (file-writable-p buffer-file-name) | |
2674 | (setq buffer-read-only nil)) | |
912192d1 | 2675 | (save-buffer)) |
b4da00e9 RM |
2676 | \f |
2677 | (defun backup-buffer () | |
2678 | "Make a backup of the disk file visited by the current buffer, if appropriate. | |
2679 | This is normally done before saving the buffer the first time. | |
27ab6944 KH |
2680 | |
2681 | A backup may be done by renaming or by copying; see documentation of | |
2682 | variable `make-backup-files'. If it's done by renaming, then the file is | |
f3f9e207 RS |
2683 | no longer accessible under its old name. |
2684 | ||
2685 | The value is non-nil after a backup was made by renaming. | |
2686 | It has the form (MODES . BACKUPNAME). | |
2687 | MODES is the result of `file-modes' on the original | |
2688 | file; this means that the caller, after saving the buffer, should change | |
2689 | the modes of the new file to agree with the old modes. | |
2690 | BACKUPNAME is the backup file name, which is the old file renamed." | |
b4da00e9 RM |
2691 | (if (and make-backup-files (not backup-inhibited) |
2692 | (not buffer-backed-up) | |
2693 | (file-exists-p buffer-file-name) | |
2694 | (memq (aref (elt (file-attributes buffer-file-name) 8) 0) | |
2695 | '(?- ?l))) | |
2696 | (let ((real-file-name buffer-file-name) | |
2697 | backup-info backupname targets setmodes) | |
2698 | ;; If specified name is a symbolic link, chase it to the target. | |
2699 | ;; Thus we make the backups in the directory where the real file is. | |
5dadeb29 | 2700 | (setq real-file-name (file-chase-links real-file-name)) |
b4da00e9 RM |
2701 | (setq backup-info (find-backup-file-name real-file-name) |
2702 | backupname (car backup-info) | |
2703 | targets (cdr backup-info)) | |
5c6d31a4 SM |
2704 | ;; (if (file-directory-p buffer-file-name) |
2705 | ;; (error "Cannot save buffer in directory %s" buffer-file-name)) | |
eb650569 RS |
2706 | (if backup-info |
2707 | (condition-case () | |
2708 | (let ((delete-old-versions | |
2709 | ;; If have old versions to maybe delete, | |
2710 | ;; ask the user to confirm now, before doing anything. | |
2711 | ;; But don't actually delete til later. | |
2712 | (and targets | |
2713 | (or (eq delete-old-versions t) (eq delete-old-versions nil)) | |
2714 | (or delete-old-versions | |
2715 | (y-or-n-p (format "Delete excess backup versions of %s? " | |
446c63b0 RS |
2716 | real-file-name))))) |
2717 | (modes (file-modes buffer-file-name))) | |
eb650569 RS |
2718 | ;; Actually write the back up file. |
2719 | (condition-case () | |
2720 | (if (or file-precious-flag | |
ffc0e1ca | 2721 | ; (file-symlink-p buffer-file-name) |
eb650569 | 2722 | backup-by-copying |
446c63b0 | 2723 | ;; Don't rename a suid or sgid file. |
7da6bf00 | 2724 | (and modes (< 0 (logand modes #o6000))) |
79d2d279 | 2725 | (not (file-writable-p (file-name-directory real-file-name))) |
eb650569 RS |
2726 | (and backup-by-copying-when-linked |
2727 | (> (file-nlinks real-file-name) 1)) | |
ffc0e1ca AS |
2728 | (and (or backup-by-copying-when-mismatch |
2729 | (integerp backup-by-copying-when-privileged-mismatch)) | |
eb650569 | 2730 | (let ((attr (file-attributes real-file-name))) |
ffc0e1ca AS |
2731 | (and (or backup-by-copying-when-mismatch |
2732 | (and (integerp (nth 2 attr)) | |
2733 | (integerp backup-by-copying-when-privileged-mismatch) | |
2734 | (<= (nth 2 attr) backup-by-copying-when-privileged-mismatch))) | |
2735 | (or (nth 9 attr) | |
2736 | (not (file-ownership-preserved-p real-file-name))))))) | |
446c63b0 | 2737 | (backup-buffer-copy real-file-name backupname modes) |
eb650569 RS |
2738 | ;; rename-file should delete old backup. |
2739 | (rename-file real-file-name backupname t) | |
446c63b0 | 2740 | (setq setmodes (cons modes backupname))) |
eb650569 RS |
2741 | (file-error |
2742 | ;; If trouble writing the backup, write it in ~. | |
567c1ca9 RS |
2743 | (setq backupname (expand-file-name |
2744 | (convert-standard-filename | |
2745 | "~/%backup%~"))) | |
2746 | (message "Cannot write backup file; backing up in %s" | |
2747 | (file-name-nondirectory backupname)) | |
eb650569 | 2748 | (sleep-for 1) |
446c63b0 | 2749 | (backup-buffer-copy real-file-name backupname modes))) |
eb650569 RS |
2750 | (setq buffer-backed-up t) |
2751 | ;; Now delete the old versions, if desired. | |
2752 | (if delete-old-versions | |
2753 | (while targets | |
2754 | (condition-case () | |
2755 | (delete-file (car targets)) | |
2756 | (file-error nil)) | |
2757 | (setq targets (cdr targets)))) | |
2758 | setmodes) | |
2759 | (file-error nil)))))) | |
b4da00e9 | 2760 | |
446c63b0 | 2761 | (defun backup-buffer-copy (from-name to-name modes) |
44dce0fb RS |
2762 | (let ((umask (default-file-modes))) |
2763 | (unwind-protect | |
2764 | (progn | |
2765 | ;; Create temp files with strict access rights. It's easy to | |
2766 | ;; loosen them later, whereas it's impossible to close the | |
2767 | ;; time-window of loose permissions otherwise. | |
2768 | (set-default-file-modes ?\700) | |
2769 | (while (condition-case () | |
2770 | (progn | |
2771 | (condition-case nil | |
2772 | (delete-file to-name) | |
2773 | (file-error nil)) | |
689accb8 | 2774 | (copy-file from-name to-name t t 'excl) |
44dce0fb RS |
2775 | nil) |
2776 | (file-already-exists t)) | |
689accb8 RS |
2777 | ;; The file was somehow created by someone else between |
2778 | ;; `delete-file' and `copy-file', so let's try again. | |
2779 | nil)) | |
44dce0fb RS |
2780 | ;; Reset the umask. |
2781 | (set-default-file-modes umask))) | |
147fbf70 RS |
2782 | (and modes |
2783 | (set-file-modes to-name (logand modes #o1777)))) | |
446c63b0 | 2784 | |
c3554e95 | 2785 | (defun file-name-sans-versions (name &optional keep-backup-version) |
ffc0e1ca | 2786 | "Return file NAME sans backup versions or strings. |
b4da00e9 | 2787 | This is a separate procedure so your site-init or startup file can |
c3554e95 RS |
2788 | redefine it. |
2789 | If the optional argument KEEP-BACKUP-VERSION is non-nil, | |
2790 | we do not remove backup version numbers, only true file version numbers." | |
6eaebaa2 | 2791 | (let ((handler (find-file-name-handler name 'file-name-sans-versions))) |
c3554e95 RS |
2792 | (if handler |
2793 | (funcall handler 'file-name-sans-versions name keep-backup-version) | |
2794 | (substring name 0 | |
2795 | (if (eq system-type 'vax-vms) | |
2796 | ;; VMS version number is (a) semicolon, optional | |
2797 | ;; sign, zero or more digits or (b) period, option | |
2798 | ;; sign, zero or more digits, provided this is the | |
2799 | ;; second period encountered outside of the | |
2800 | ;; device/directory part of the file name. | |
26add1bf KH |
2801 | (or (string-match ";[-+]?[0-9]*\\'" name) |
2802 | (if (string-match "\\.[^]>:]*\\(\\.[-+]?[0-9]*\\)\\'" | |
c3554e95 RS |
2803 | name) |
2804 | (match-beginning 1)) | |
2805 | (length name)) | |
2806 | (if keep-backup-version | |
2807 | (length name) | |
dbb12f2c | 2808 | (or (string-match "\\.~[0-9.]+~\\'" name) |
c3554e95 RS |
2809 | (string-match "~\\'" name) |
2810 | (length name)))))))) | |
b4da00e9 | 2811 | |
cb0cd911 | 2812 | (defun file-ownership-preserved-p (file) |
ffc0e1ca | 2813 | "Return t if deleting FILE and rewriting it would preserve the owner." |
cb0cd911 RS |
2814 | (let ((handler (find-file-name-handler file 'file-ownership-preserved-p))) |
2815 | (if handler | |
2816 | (funcall handler 'file-ownership-preserved-p file) | |
ec5533be | 2817 | (let ((attributes (file-attributes file))) |
306faa42 RS |
2818 | ;; Return t if the file doesn't exist, since it's true that no |
2819 | ;; information would be lost by an (attempted) delete and create. | |
2820 | (or (null attributes) | |
2821 | (= (nth 2 attributes) (user-uid))))))) | |
cb0cd911 | 2822 | |
20b5d24c RS |
2823 | (defun file-name-sans-extension (filename) |
2824 | "Return FILENAME sans final \"extension\". | |
2531b0c3 EZ |
2825 | The extension, in a file name, is the part that follows the last `.', |
2826 | except that a leading `.', if any, doesn't count." | |
20b5d24c RS |
2827 | (save-match-data |
2828 | (let ((file (file-name-sans-versions (file-name-nondirectory filename))) | |
2829 | directory) | |
2531b0c3 EZ |
2830 | (if (and (string-match "\\.[^.]*\\'" file) |
2831 | (not (eq 0 (match-beginning 0)))) | |
20b5d24c | 2832 | (if (setq directory (file-name-directory filename)) |
6ee24f1e RS |
2833 | ;; Don't use expand-file-name here; if DIRECTORY is relative, |
2834 | ;; we don't want to expand it. | |
2835 | (concat directory (substring file 0 (match-beginning 0))) | |
20b5d24c RS |
2836 | (substring file 0 (match-beginning 0))) |
2837 | filename)))) | |
2838 | ||
93a2702d RS |
2839 | (defun file-name-extension (filename &optional period) |
2840 | "Return FILENAME's final \"extension\". | |
2531b0c3 EZ |
2841 | The extension, in a file name, is the part that follows the last `.', |
2842 | except that a leading `.', if any, doesn't count. | |
93a2702d RS |
2843 | Return nil for extensionless file names such as `foo'. |
2844 | Return the empty string for file names such as `foo.'. | |
2845 | ||
2846 | If PERIOD is non-nil, then the returned value includes the period | |
2847 | that delimits the extension, and if FILENAME has no extension, | |
2848 | the value is \"\"." | |
2849 | (save-match-data | |
2850 | (let ((file (file-name-sans-versions (file-name-nondirectory filename)))) | |
2531b0c3 EZ |
2851 | (if (and (string-match "\\.[^.]*\\'" file) |
2852 | (not (eq 0 (match-beginning 0)))) | |
93a2702d RS |
2853 | (substring file (+ (match-beginning 0) (if period 0 1))) |
2854 | (if period | |
2855 | ""))))) | |
2856 | ||
ffc0e1ca AS |
2857 | (defcustom make-backup-file-name-function nil |
2858 | "A function to use instead of the default `make-backup-file-name'. | |
643c985d | 2859 | A value of nil gives the default `make-backup-file-name' behavior. |
ffc0e1ca | 2860 | |
d5798fa7 | 2861 | This could be buffer-local to do something special for specific |
ffc0e1ca AS |
2862 | files. If you define it, you may need to change `backup-file-name-p' |
2863 | and `file-name-sans-versions' too. | |
2864 | ||
2865 | See also `backup-directory-alist'." | |
2866 | :group 'backup | |
2867 | :type '(choice (const :tag "Default" nil) | |
2868 | (function :tag "Your function"))) | |
2869 | ||
2870 | (defcustom backup-directory-alist nil | |
2871 | "Alist of filename patterns and backup directory names. | |
2872 | Each element looks like (REGEXP . DIRECTORY). Backups of files with | |
2873 | names matching REGEXP will be made in DIRECTORY. DIRECTORY may be | |
2874 | relative or absolute. If it is absolute, so that all matching files | |
2875 | are backed up into the same directory, the file names in this | |
2876 | directory will be the full name of the file backed up with all | |
2877 | directory separators changed to `!' to prevent clashes. This will not | |
2878 | work correctly if your filesystem truncates the resulting name. | |
2879 | ||
2880 | For the common case of all backups going into one directory, the alist | |
2881 | should contain a single element pairing \".\" with the appropriate | |
2882 | directory name. | |
2883 | ||
2884 | If this variable is nil, or it fails to match a filename, the backup | |
2885 | is made in the original file's directory. | |
2886 | ||
2887 | On MS-DOS filesystems without long names this variable is always | |
2888 | ignored." | |
2889 | :group 'backup | |
dca5e71d | 2890 | :type '(repeat (cons (regexp :tag "Regexp matching filename") |
ffc0e1ca AS |
2891 | (directory :tag "Backup directory name")))) |
2892 | ||
388d6ab5 RS |
2893 | (defun normal-backup-enable-predicate (name) |
2894 | "Default `backup-enable-predicate' function. | |
0c2f6dda RS |
2895 | Checks for files in `temporary-file-directory', |
2896 | `small-temporary-file-directory', and /tmp." | |
388d6ab5 RS |
2897 | (not (or (let ((comp (compare-strings temporary-file-directory 0 nil |
2898 | name 0 nil))) | |
2899 | ;; Directory is under temporary-file-directory. | |
2900 | (and (not (eq comp t)) | |
2901 | (< comp (- (length temporary-file-directory))))) | |
0c2f6dda RS |
2902 | (let ((comp (compare-strings "/tmp" 0 nil |
2903 | name 0 nil))) | |
2904 | ;; Directory is under /tmp. | |
2905 | (and (not (eq comp t)) | |
2906 | (< comp (- (length "/tmp"))))) | |
388d6ab5 RS |
2907 | (if small-temporary-file-directory |
2908 | (let ((comp (compare-strings small-temporary-file-directory | |
2909 | 0 nil | |
2910 | name 0 nil))) | |
2911 | ;; Directory is under small-temporary-file-directory. | |
2912 | (and (not (eq comp t)) | |
2913 | (< comp (- (length small-temporary-file-directory))))))))) | |
2914 | ||
b4da00e9 RM |
2915 | (defun make-backup-file-name (file) |
2916 | "Create the non-numeric backup file name for FILE. | |
ffc0e1ca AS |
2917 | Normally this will just be the file's name with `~' appended. |
2918 | Customization hooks are provided as follows. | |
2919 | ||
2920 | If the variable `make-backup-file-name-function' is non-nil, its value | |
2921 | should be a function which will be called with FILE as its argument; | |
2922 | the resulting name is used. | |
2923 | ||
2924 | Otherwise a match for FILE is sought in `backup-directory-alist'; see | |
2925 | the documentation of that variable. If the directory for the backup | |
2926 | doesn't exist, it is created." | |
2927 | (if make-backup-file-name-function | |
2928 | (funcall make-backup-file-name-function file) | |
2929 | (if (and (eq system-type 'ms-dos) | |
2930 | (not (msdos-long-file-names))) | |
2931 | (let ((fn (file-name-nondirectory file))) | |
2932 | (concat (file-name-directory file) | |
2933 | (or (and (string-match "\\`[^.]+\\'" fn) | |
2934 | (concat (match-string 0 fn) ".~")) | |
2935 | (and (string-match "\\`[^.]+\\.\\(..?\\)?" fn) | |
2936 | (concat (match-string 0 fn) "~"))))) | |
2937 | (concat (make-backup-file-name-1 file) "~")))) | |
2938 | ||
2939 | (defun make-backup-file-name-1 (file) | |
2940 | "Subroutine of `make-backup-file-name' and `find-backup-file-name'." | |
2941 | (let ((alist backup-directory-alist) | |
818286f4 | 2942 | elt backup-directory) |
ffc0e1ca AS |
2943 | (while alist |
2944 | (setq elt (pop alist)) | |
2945 | (if (string-match (car elt) file) | |
2946 | (setq backup-directory (cdr elt) | |
2947 | alist nil))) | |
ee291b46 | 2948 | (if (and backup-directory (not (file-exists-p backup-directory))) |
ffc0e1ca AS |
2949 | (condition-case nil |
2950 | (make-directory backup-directory 'parents) | |
ee291b46 RS |
2951 | (file-error (setq backup-directory nil)))) |
2952 | (if (null backup-directory) | |
2953 | file | |
ffc0e1ca AS |
2954 | (if (file-name-absolute-p backup-directory) |
2955 | (progn | |
c60ee5e7 | 2956 | (when (memq system-type '(windows-nt ms-dos cygwin)) |
d7b6ca4a RS |
2957 | ;; Normalize DOSish file names: downcase the drive |
2958 | ;; letter, if any, and replace the leading "x:" with | |
2959 | ;; "/drive_x". | |
ffc0e1ca AS |
2960 | (or (file-name-absolute-p file) |
2961 | (setq file (expand-file-name file))) ; make defaults explicit | |
2962 | ;; Replace any invalid file-name characters (for the | |
2963 | ;; case of backing up remote files). | |
446c097e | 2964 | (setq file (expand-file-name (convert-standard-filename file))) |
ffc0e1ca | 2965 | (if (eq (aref file 1) ?:) |
d7b6ca4a | 2966 | (setq file (concat "/" |
ffc0e1ca AS |
2967 | "drive_" |
2968 | (char-to-string (downcase (aref file 0))) | |
d7b6ca4a | 2969 | (if (eq (aref file 2) ?/) |
ffc0e1ca | 2970 | "" |
d7b6ca4a | 2971 | "/") |
ffc0e1ca AS |
2972 | (substring file 2))))) |
2973 | ;; Make the name unique by substituting directory | |
2974 | ;; separators. It may not really be worth bothering about | |
2975 | ;; doubling `!'s in the original name... | |
2976 | (expand-file-name | |
2977 | (subst-char-in-string | |
d7b6ca4a | 2978 | ?/ ?! |
ffc0e1ca AS |
2979 | (replace-regexp-in-string "!" "!!" file)) |
2980 | backup-directory)) | |
2981 | (expand-file-name (file-name-nondirectory file) | |
2982 | (file-name-as-directory | |
2983 | (expand-file-name backup-directory | |
2984 | (file-name-directory file)))))))) | |
b4da00e9 RM |
2985 | |
2986 | (defun backup-file-name-p (file) | |
2987 | "Return non-nil if FILE is a backup file name (numeric or not). | |
2988 | This is a separate function so you can redefine it for customization. | |
2989 | You may need to redefine `file-name-sans-versions' as well." | |
066327ae | 2990 | (string-match "~\\'" file)) |
b4da00e9 | 2991 | |
e2b30772 RS |
2992 | (defvar backup-extract-version-start) |
2993 | ||
2d051399 | 2994 | ;; This is used in various files. |
a7aa942a KH |
2995 | ;; The usage of backup-extract-version-start is not very clean, |
2996 | ;; but I can't see a good alternative, so as of now I am leaving it alone. | |
2d051399 | 2997 | (defun backup-extract-version (fn) |
ffc0e1ca | 2998 | "Given the name of a numeric backup file, FN, return the backup number. |
e2b30772 | 2999 | Uses the free variable `backup-extract-version-start', whose value should be |
2d051399 | 3000 | the index in the name where the version number begins." |
e2b30772 RS |
3001 | (if (and (string-match "[0-9]+~$" fn backup-extract-version-start) |
3002 | (= (match-beginning 0) backup-extract-version-start)) | |
027a4b6b | 3003 | (string-to-number (substring fn backup-extract-version-start -1)) |
2d051399 RS |
3004 | 0)) |
3005 | ||
b4da00e9 RM |
3006 | ;; I believe there is no need to alter this behavior for VMS; |
3007 | ;; since backup files are not made on VMS, it should not get called. | |
3008 | (defun find-backup-file-name (fn) | |
ffc0e1ca | 3009 | "Find a file name for a backup file FN, and suggestions for deletions. |
b4da00e9 | 3010 | Value is a list whose car is the name for the backup file |
ffc0e1ca AS |
3011 | and whose cdr is a list of old versions to consider deleting now. |
3012 | If the value is nil, don't make a backup. | |
3013 | Uses `backup-directory-alist' in the same way as does | |
3014 | `make-backup-file-name'." | |
eb650569 RS |
3015 | (let ((handler (find-file-name-handler fn 'find-backup-file-name))) |
3016 | ;; Run a handler for this function so that ange-ftp can refuse to do it. | |
3017 | (if handler | |
3018 | (funcall handler 'find-backup-file-name fn) | |
f26d858e EZ |
3019 | (if (or (eq version-control 'never) |
3020 | ;; We don't support numbered backups on plain MS-DOS | |
3021 | ;; when long file names are unavailable. | |
3022 | (and (eq system-type 'ms-dos) | |
3023 | (not (msdos-long-file-names)))) | |
b4da00e9 | 3024 | (list (make-backup-file-name fn)) |
ffc0e1ca AS |
3025 | (let* ((basic-name (make-backup-file-name-1 fn)) |
3026 | (base-versions (concat (file-name-nondirectory basic-name) | |
3027 | ".~")) | |
e2b30772 | 3028 | (backup-extract-version-start (length base-versions)) |
eb650569 | 3029 | (high-water-mark 0) |
ffc0e1ca AS |
3030 | (number-to-delete 0) |
3031 | possibilities deserve-versions-p versions) | |
eb650569 RS |
3032 | (condition-case () |
3033 | (setq possibilities (file-name-all-completions | |
3034 | base-versions | |
ffc0e1ca AS |
3035 | (file-name-directory basic-name)) |
3036 | versions (sort (mapcar #'backup-extract-version | |
3037 | possibilities) | |
3038 | #'<) | |
eb650569 RS |
3039 | high-water-mark (apply 'max 0 versions) |
3040 | deserve-versions-p (or version-control | |
3041 | (> high-water-mark 0)) | |
3042 | number-to-delete (- (length versions) | |
ffc0e1ca AS |
3043 | kept-old-versions |
3044 | kept-new-versions | |
3045 | -1)) | |
3046 | (file-error (setq possibilities nil))) | |
eb650569 | 3047 | (if (not deserve-versions-p) |
8767d866 | 3048 | (list (make-backup-file-name fn)) |
ffc0e1ca | 3049 | (cons (format "%s.~%d~" basic-name (1+ high-water-mark)) |
eb650569 RS |
3050 | (if (and (> number-to-delete 0) |
3051 | ;; Delete nothing if there is overflow | |
3052 | ;; in the number of versions to keep. | |
3053 | (>= (+ kept-new-versions kept-old-versions -1) 0)) | |
ffc0e1ca AS |
3054 | (mapcar (lambda (n) |
3055 | (format "%s.~%d~" basic-name n)) | |
eb650569 RS |
3056 | (let ((v (nthcdr kept-old-versions versions))) |
3057 | (rplacd (nthcdr (1- number-to-delete) v) ()) | |
3058 | v)))))))))) | |
b4da00e9 | 3059 | |
b4da00e9 RM |
3060 | (defun file-nlinks (filename) |
3061 | "Return number of names file FILENAME has." | |
3062 | (car (cdr (file-attributes filename)))) | |
6c636af9 | 3063 | |
753ad988 KG |
3064 | ;; (defun file-relative-name (filename &optional directory) |
3065 | ;; "Convert FILENAME to be relative to DIRECTORY (default: `default-directory'). | |
3066 | ;; This function returns a relative file name which is equivalent to FILENAME | |
3067 | ;; when used with that default directory as the default. | |
3068 | ;; If this is impossible (which can happen on MSDOS and Windows | |
3069 | ;; when the file name and directory use different drive names) | |
3070 | ;; then it returns FILENAME." | |
3071 | ;; (save-match-data | |
3072 | ;; (let ((fname (expand-file-name filename))) | |
3073 | ;; (setq directory (file-name-as-directory | |
3074 | ;; (expand-file-name (or directory default-directory)))) | |
3075 | ;; ;; On Microsoft OSes, if FILENAME and DIRECTORY have different | |
3076 | ;; ;; drive names, they can't be relative, so return the absolute name. | |
3077 | ;; (if (and (or (eq system-type 'ms-dos) | |
3078 | ;; (eq system-type 'cygwin) | |
3079 | ;; (eq system-type 'windows-nt)) | |
3080 | ;; (not (string-equal (substring fname 0 2) | |
3081 | ;; (substring directory 0 2)))) | |
3082 | ;; filename | |
3083 | ;; (let ((ancestor ".") | |
3084 | ;; (fname-dir (file-name-as-directory fname))) | |
3085 | ;; (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir)) | |
3086 | ;; (not (string-match (concat "^" (regexp-quote directory)) fname))) | |
3087 | ;; (setq directory (file-name-directory (substring directory 0 -1)) | |
3088 | ;; ancestor (if (equal ancestor ".") | |
3089 | ;; ".." | |
3090 | ;; (concat "../" ancestor)))) | |
3091 | ;; ;; Now ancestor is empty, or .., or ../.., etc. | |
3092 | ;; (if (string-match (concat "^" (regexp-quote directory)) fname) | |
3093 | ;; ;; We matched within FNAME's directory part. | |
3094 | ;; ;; Add the rest of FNAME onto ANCESTOR. | |
3095 | ;; (let ((rest (substring fname (match-end 0)))) | |
3096 | ;; (if (and (equal ancestor ".") | |
3097 | ;; (not (equal rest ""))) | |
3098 | ;; ;; But don't bother with ANCESTOR if it would give us `./'. | |
3099 | ;; rest | |
3100 | ;; (concat (file-name-as-directory ancestor) rest))) | |
3101 | ;; ;; We matched FNAME's directory equivalent. | |
3102 | ;; ancestor)))))) | |
3103 | ||
6c636af9 | 3104 | (defun file-relative-name (filename &optional directory) |
ffc0e1ca | 3105 | "Convert FILENAME to be relative to DIRECTORY (default: `default-directory'). |
2d6562a5 RS |
3106 | This function returns a relative file name which is equivalent to FILENAME |
3107 | when used with that default directory as the default. | |
753ad988 | 3108 | If FILENAME and DIRECTORY lie on different machines or on different drives |
493c98af | 3109 | on a DOS/Windows machine, it returns FILENAME on expanded form." |
96c188b0 | 3110 | (save-match-data |
753ad988 KG |
3111 | (setq directory |
3112 | (file-name-as-directory (expand-file-name (or directory | |
3113 | default-directory)))) | |
3114 | (setq filename (expand-file-name filename)) | |
3f788773 KG |
3115 | (let ((fremote (file-remote-p filename)) |
3116 | (dremote (file-remote-p directory))) | |
493c98af KG |
3117 | (if ;; Conditions for separate trees |
3118 | (or | |
3119 | ;; Test for different drives on DOS/Windows | |
3120 | (and | |
7c64272b | 3121 | ;; Should `cygwin' really be included here? --stef |
493c98af | 3122 | (memq system-type '(ms-dos cygwin windows-nt)) |
7c64272b | 3123 | (not (eq t (compare-strings filename 0 2 directory 0 2)))) |
493c98af | 3124 | ;; Test for different remote file system identification |
3f788773 | 3125 | (not (equal fremote dremote))) |
e2b30772 | 3126 | filename |
753ad988 KG |
3127 | (let ((ancestor ".") |
3128 | (filename-dir (file-name-as-directory filename))) | |
7c64272b SM |
3129 | (while (not |
3130 | (or | |
3131 | (eq t (compare-strings filename-dir nil (length directory) | |
3132 | directory nil nil case-fold-search)) | |
3133 | (eq t (compare-strings filename nil (length directory) | |
3134 | directory nil nil case-fold-search)))) | |
753ad988 | 3135 | (setq directory (file-name-directory (substring directory 0 -1)) |
9695aac6 RS |
3136 | ancestor (if (equal ancestor ".") |
3137 | ".." | |
3138 | (concat "../" ancestor)))) | |
753ad988 | 3139 | ;; Now ancestor is empty, or .., or ../.., etc. |
7c64272b SM |
3140 | (if (eq t (compare-strings filename nil (length directory) |
3141 | directory nil nil case-fold-search)) | |
753ad988 KG |
3142 | ;; We matched within FILENAME's directory part. |
3143 | ;; Add the rest of FILENAME onto ANCESTOR. | |
3f7d6528 | 3144 | (let ((rest (substring filename (length directory)))) |
753ad988 | 3145 | (if (and (equal ancestor ".") (not (equal rest ""))) |
9695aac6 RS |
3146 | ;; But don't bother with ANCESTOR if it would give us `./'. |
3147 | rest | |
3148 | (concat (file-name-as-directory ancestor) rest))) | |
753ad988 KG |
3149 | ;; We matched FILENAME's directory equivalent. |
3150 | ancestor)))))) | |
b4da00e9 RM |
3151 | \f |
3152 | (defun save-buffer (&optional args) | |
9dce96b5 | 3153 | "Save current buffer in visited file if modified. Variations are described below. |
b4da00e9 RM |
3154 | By default, makes the previous version into a backup file |
3155 | if previously requested or if this is the first save. | |
dc2ab26e | 3156 | Prefixed with one \\[universal-argument], marks this version |
b4da00e9 | 3157 | to become a backup when the next save is done. |
dc2ab26e | 3158 | Prefixed with two \\[universal-argument]'s, |
b4da00e9 | 3159 | unconditionally makes the previous version into a backup file. |
dc2ab26e | 3160 | Prefixed with three \\[universal-argument]'s, marks this version |
ac9650be RS |
3161 | to become a backup when the next save is done, |
3162 | and unconditionally makes the previous version into a backup file. | |
3163 | ||
dc2ab26e EZ |
3164 | With a numeric argument of 0, never make the previous version |
3165 | into a backup file. | |
b4da00e9 RM |
3166 | |
3167 | If a file's name is FOO, the names of its numbered backup versions are | |
3168 | FOO.~i~ for various integers i. A non-numbered backup file is called FOO~. | |
3169 | Numeric backups (rather than FOO~) will be made if value of | |
3170 | `version-control' is not the atom `never' and either there are already | |
3171 | numeric versions of the file being backed up, or `version-control' is | |
3172 | non-nil. | |
3173 | We don't want excessive versions piling up, so there are variables | |
3174 | `kept-old-versions', which tells Emacs how many oldest versions to keep, | |
3175 | and `kept-new-versions', which tells how many newest versions to keep. | |
3176 | Defaults are 2 old versions and 2 new. | |
3177 | `dired-kept-versions' controls dired's clean-directory (.) command. | |
de7d5e1b | 3178 | If `delete-old-versions' is nil, system will query user |
e73ec04b RS |
3179 | before trimming versions. Otherwise it does it silently. |
3180 | ||
749d2ee6 RS |
3181 | If `vc-make-backup-files' is nil, which is the default, |
3182 | no backup files are made for files managed by version control. | |
3183 | (This is because the version control system itself records previous versions.) | |
3184 | ||
e73ec04b | 3185 | See the subroutine `basic-save-buffer' for more information." |
b4da00e9 RM |
3186 | (interactive "p") |
3187 | (let ((modp (buffer-modified-p)) | |
3188 | (large (> (buffer-size) 50000)) | |
b5a8e0fc RS |
3189 | (make-backup-files (or (and make-backup-files (not (eq args 0))) |
3190 | (memq args '(16 64))))) | |
b4da00e9 | 3191 | (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) |
b4990dde GM |
3192 | (if (and modp large (buffer-file-name)) |
3193 | (message "Saving file %s..." (buffer-file-name))) | |
b4da00e9 RM |
3194 | (basic-save-buffer) |
3195 | (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) | |
3196 | ||
3197 | (defun delete-auto-save-file-if-necessary (&optional force) | |
3198 | "Delete auto-save file for current buffer if `delete-auto-save-files' is t. | |
3199 | Normally delete only if the file was written by this Emacs since | |
3200 | the last real save, but optional arg FORCE non-nil means delete anyway." | |
3201 | (and buffer-auto-save-file-name delete-auto-save-files | |
3202 | (not (string= buffer-file-name buffer-auto-save-file-name)) | |
3203 | (or force (recent-auto-save-p)) | |
3204 | (progn | |
3205 | (condition-case () | |
3206 | (delete-file buffer-auto-save-file-name) | |
3207 | (file-error nil)) | |
3208 | (set-buffer-auto-saved)))) | |
3209 | ||
481f215b KH |
3210 | (defvar auto-save-hook nil |
3211 | "Normal hook run just before auto-saving.") | |
3212 | ||
3c3b81d1 SJ |
3213 | (defcustom before-save-hook nil |
3214 | "Normal hook that is run before a buffer is saved to its file." | |
25f6295e | 3215 | :options '(copyright-update time-stamp) |
3c3b81d1 SJ |
3216 | :type 'hook |
3217 | :group 'files) | |
3218 | ||
ffc0e1ca AS |
3219 | (defcustom after-save-hook nil |
3220 | "Normal hook that is run after a buffer is saved to its file." | |
3221 | :options '(executable-make-buffer-file-executable-if-script-p) | |
3222 | :type 'hook | |
3223 | :group 'files) | |
1cc852cc | 3224 | |
0516edee RS |
3225 | (defvar save-buffer-coding-system nil |
3226 | "If non-nil, use this coding system for saving the buffer. | |
3227 | More precisely, use this coding system in place of the | |
3228 | value of `buffer-file-coding-system', when saving the buffer. | |
3229 | Calling `write-region' for any purpose other than saving the buffer | |
3230 | will still use `buffer-file-coding-system'; this variable has no effect | |
3231 | in such cases.") | |
3232 | ||
d5fe94cc RS |
3233 | (make-variable-buffer-local 'save-buffer-coding-system) |
3234 | (put 'save-buffer-coding-system 'permanent-local t) | |
3235 | ||
b4da00e9 | 3236 | (defun basic-save-buffer () |
1cc852cc | 3237 | "Save the current buffer in its visited file, if it has been modified. |
0370fe77 SM |
3238 | The hooks `write-contents-functions' and `write-file-functions' get a chance |
3239 | to do the job of saving; if they do not, then the buffer is saved in | |
3240 | the visited file file in the usual way. | |
3c3b81d1 SJ |
3241 | Before and after saving the buffer, this function runs |
3242 | `before-save-hook' and `after-save-hook', respectively." | |
b4da00e9 | 3243 | (interactive) |
19618231 | 3244 | (save-current-buffer |
c11a94fe RS |
3245 | ;; In an indirect buffer, save its base buffer instead. |
3246 | (if (buffer-base-buffer) | |
3247 | (set-buffer (buffer-base-buffer))) | |
3248 | (if (buffer-modified-p) | |
3249 | (let ((recent-save (recent-auto-save-p)) | |
818286f4 | 3250 | setmodes) |
c11a94fe RS |
3251 | ;; On VMS, rename file and buffer to get rid of version number. |
3252 | (if (and (eq system-type 'vax-vms) | |
3253 | (not (string= buffer-file-name | |
3254 | (file-name-sans-versions buffer-file-name)))) | |
3255 | (let (buffer-new-name) | |
3256 | ;; Strip VMS version number before save. | |
3257 | (setq buffer-file-name | |
3258 | (file-name-sans-versions buffer-file-name)) | |
3259 | ;; Construct a (unique) buffer name to correspond. | |
3260 | (let ((buf (create-file-buffer (downcase buffer-file-name)))) | |
3261 | (setq buffer-new-name (buffer-name buf)) | |
3262 | (kill-buffer buf)) | |
3263 | (rename-buffer buffer-new-name))) | |
3264 | ;; If buffer has no file name, ask user for one. | |
3265 | (or buffer-file-name | |
182891ef RS |
3266 | (let ((filename |
3267 | (expand-file-name | |
3268 | (read-file-name "File to save in: ") nil))) | |
3269 | (and (file-exists-p filename) | |
3270 | (or (y-or-n-p (format "File `%s' exists; overwrite? " | |
3271 | filename)) | |
3272 | (error "Canceled"))) | |
3273 | (set-visited-file-name filename))) | |
c11a94fe RS |
3274 | (or (verify-visited-file-modtime (current-buffer)) |
3275 | (not (file-exists-p buffer-file-name)) | |
3276 | (yes-or-no-p | |
3277 | (format "%s has changed since visited or saved. Save anyway? " | |
3278 | (file-name-nondirectory buffer-file-name))) | |
3279 | (error "Save not confirmed")) | |
3280 | (save-restriction | |
3281 | (widen) | |
19618231 | 3282 | (save-excursion |
0370fe77 | 3283 | (and (> (point-max) (point-min)) |
407b4328 | 3284 | (not find-file-literally) |
19618231 RS |
3285 | (/= (char-after (1- (point-max))) ?\n) |
3286 | (not (and (eq selective-display t) | |
3287 | (= (char-after (1- (point-max))) ?\r))) | |
3288 | (or (eq require-final-newline t) | |
f4206092 | 3289 | (eq require-final-newline 'visit-save) |
19618231 RS |
3290 | (and require-final-newline |
3291 | (y-or-n-p | |
3292 | (format "Buffer %s does not end in newline. Add one? " | |
3293 | (buffer-name))))) | |
3294 | (save-excursion | |
3295 | (goto-char (point-max)) | |
3296 | (insert ?\n)))) | |
fa5867f6 AS |
3297 | ;; Support VC version backups. |
3298 | (vc-before-save) | |
3c3b81d1 | 3299 | (run-hooks 'before-save-hook) |
0370fe77 | 3300 | (or (run-hook-with-args-until-success 'write-contents-functions) |
c11a94fe | 3301 | (run-hook-with-args-until-success 'local-write-file-hooks) |
0370fe77 | 3302 | (run-hook-with-args-until-success 'write-file-functions) |
0ba5894b RS |
3303 | ;; If a hook returned t, file is already "written". |
3304 | ;; Otherwise, write it the usual way now. | |
3305 | (setq setmodes (basic-save-buffer-1))) | |
d6e8ea6f KH |
3306 | ;; Now we have saved the current buffer. Let's make sure |
3307 | ;; that buffer-file-coding-system is fixed to what | |
3308 | ;; actually used for saving by binding it locally. | |
0516edee RS |
3309 | (if save-buffer-coding-system |
3310 | (setq save-buffer-coding-system last-coding-system-used) | |
3311 | (setq buffer-file-coding-system last-coding-system-used)) | |
2a47b4f5 RS |
3312 | (setq buffer-file-number |
3313 | (nthcdr 10 (file-attributes buffer-file-name))) | |
c11a94fe RS |
3314 | (if setmodes |
3315 | (condition-case () | |
f3f9e207 | 3316 | (set-file-modes buffer-file-name (car setmodes)) |
c11a94fe RS |
3317 | (error nil)))) |
3318 | ;; If the auto-save file was recent before this command, | |
3319 | ;; delete it now. | |
3320 | (delete-auto-save-file-if-necessary recent-save) | |
49530862 RS |
3321 | ;; Support VC `implicit' locking. |
3322 | (vc-after-save) | |
c11a94fe RS |
3323 | (run-hooks 'after-save-hook)) |
3324 | (message "(No changes need to be saved)")))) | |
b4da00e9 | 3325 | |
87d26afc RS |
3326 | ;; This does the "real job" of writing a buffer into its visited file |
3327 | ;; and making a backup file. This is what is normally done | |
0370fe77 | 3328 | ;; but inhibited if one of write-file-functions returns non-nil. |
f3f9e207 | 3329 | ;; It returns a value (MODES . BACKUPNAME), like backup-buffer. |
87d26afc | 3330 | (defun basic-save-buffer-1 () |
969be033 RS |
3331 | (prog1 |
3332 | (if save-buffer-coding-system | |
3333 | (let ((coding-system-for-write save-buffer-coding-system)) | |
3334 | (basic-save-buffer-2)) | |
d5fe94cc | 3335 | (basic-save-buffer-2)) |
969be033 | 3336 | (setq buffer-file-coding-system-explicit last-coding-system-used))) |
d5fe94cc | 3337 | |
f3f9e207 | 3338 | ;; This returns a value (MODES . BACKUPNAME), like backup-buffer. |
d5fe94cc RS |
3339 | (defun basic-save-buffer-2 () |
3340 | (let (tempsetmodes setmodes) | |
87d26afc RS |
3341 | (if (not (file-writable-p buffer-file-name)) |
3342 | (let ((dir (file-name-directory buffer-file-name))) | |
3343 | (if (not (file-directory-p dir)) | |
83c6f446 RS |
3344 | (if (file-exists-p dir) |
3345 | (error "%s is not a directory" dir) | |
cb2fdcfa | 3346 | (error "%s: no such directory" buffer-file-name)) |
87d26afc RS |
3347 | (if (not (file-exists-p buffer-file-name)) |
3348 | (error "Directory %s write-protected" dir) | |
3349 | (if (yes-or-no-p | |
3350 | (format "File %s is write-protected; try to save anyway? " | |
3351 | (file-name-nondirectory | |
3352 | buffer-file-name))) | |
3353 | (setq tempsetmodes t) | |
3354 | (error "Attempt to save to a file which you aren't allowed to write")))))) | |
3355 | (or buffer-backed-up | |
3356 | (setq setmodes (backup-buffer))) | |
76d5492b | 3357 | (let ((dir (file-name-directory buffer-file-name))) |
f4a0f59b RS |
3358 | (if (and file-precious-flag |
3359 | (file-writable-p dir)) | |
3360 | ;; If file is precious, write temp name, then rename it. | |
3361 | ;; This requires write access to the containing dir, | |
3362 | ;; which is why we don't try it if we don't have that access. | |
3363 | (let ((realname buffer-file-name) | |
44dce0fb RS |
3364 | tempname succeed |
3365 | (umask (default-file-modes)) | |
6782610c | 3366 | (old-modtime (visited-file-modtime))) |
44dce0fb RS |
3367 | ;; Create temp files with strict access rights. It's easy to |
3368 | ;; loosen them later, whereas it's impossible to close the | |
3369 | ;; time-window of loose permissions otherwise. | |
f4a0f59b | 3370 | (unwind-protect |
44dce0fb RS |
3371 | (progn |
3372 | (clear-visited-file-modtime) | |
3373 | (set-default-file-modes ?\700) | |
3374 | ;; Try various temporary names. | |
3375 | ;; This code follows the example of make-temp-file, | |
3376 | ;; but it calls write-region in the appropriate way | |
3377 | ;; for saving the buffer. | |
3378 | (while (condition-case () | |
3379 | (progn | |
3380 | (setq tempname | |
3381 | (make-temp-name | |
3382 | (expand-file-name "tmp" dir))) | |
3383 | (write-region (point-min) (point-max) | |
3384 | tempname nil realname | |
3385 | buffer-file-truename 'excl) | |
3386 | nil) | |
3387 | (file-already-exists t)) | |
3388 | ;; The file was somehow created by someone else between | |
3389 | ;; `make-temp-name' and `write-region', let's try again. | |
3390 | nil) | |
3391 | (setq succeed t)) | |
3392 | ;; Reset the umask. | |
3393 | (set-default-file-modes umask) | |
3394 | ;; If we failed, restore the buffer's modtime. | |
3395 | (unless succeed | |
3396 | (set-visited-file-modtime old-modtime))) | |
3397 | ;; Since we have created an entirely new file, | |
3398 | ;; make sure it gets the right permission bits set. | |
f3f9e207 RS |
3399 | (setq setmodes (or setmodes (cons (file-modes buffer-file-name) |
3400 | buffer-file-name))) | |
f4a0f59b RS |
3401 | ;; We succeeded in writing the temp file, |
3402 | ;; so rename it. | |
3403 | (rename-file tempname buffer-file-name t)) | |
3404 | ;; If file not writable, see if we can make it writable | |
3405 | ;; temporarily while we write it. | |
3406 | ;; But no need to do so if we have just backed it up | |
3407 | ;; (setmodes is set) because that says we're superseding. | |
3408 | (cond ((and tempsetmodes (not setmodes)) | |
3409 | ;; Change the mode back, after writing. | |
f3f9e207 RS |
3410 | (setq setmodes (cons (file-modes buffer-file-name) buffer-file-name)) |
3411 | (set-file-modes buffer-file-name (logior (car setmodes) 128)))) | |
3412 | (let (success) | |
3413 | (unwind-protect | |
3414 | (progn | |
3415 | (write-region (point-min) (point-max) | |
3416 | buffer-file-name nil t buffer-file-truename) | |
3417 | (setq success t)) | |
3418 | ;; If we get an error writing the new file, and we made | |
3419 | ;; the backup by renaming, undo the backing-up. | |
3420 | (and setmodes (not success) | |
3421 | (rename-file (cdr setmodes) buffer-file-name)))))) | |
87d26afc RS |
3422 | setmodes)) |
3423 | ||
1eeae2a1 RS |
3424 | (defun diff-buffer-with-file (&optional buffer) |
3425 | "View the differences between BUFFER and its associated file. | |
0b9e4749 | 3426 | This requires the external program `diff' to be in your `exec-path'." |
1eeae2a1 | 3427 | (interactive "bBuffer: ") |
0b9e4749 | 3428 | (with-current-buffer (get-buffer (or buffer (current-buffer))) |
4e4e9519 MR |
3429 | (if (and buffer-file-name |
3430 | (file-exists-p buffer-file-name)) | |
3431 | (let ((tempfile (make-temp-file "buffer-content-"))) | |
3432 | (unwind-protect | |
3433 | (save-restriction | |
3434 | (widen) | |
3435 | (write-region (point-min) (point-max) tempfile nil 'nomessage) | |
3436 | (diff buffer-file-name tempfile nil t) | |
3437 | (sit-for 0)) | |
3438 | (when (file-exists-p tempfile) | |
3439 | (delete-file tempfile)))) | |
3440 | (message "Buffer %s has no associated file on disc" (buffer-name)) | |
3441 | ;; Display that message for 1 second so that user can read it | |
3442 | ;; in the minibuffer. | |
3443 | (sit-for 1))) | |
3444 | ;; return always nil, so that save-buffers-kill-emacs will not move | |
3445 | ;; over to the next unsaved buffer when calling `d'. | |
3446 | nil) | |
1eeae2a1 RS |
3447 | |
3448 | (defvar save-some-buffers-action-alist | |
3449 | '((?\C-r | |
3450 | (lambda (buf) | |
3451 | (view-buffer buf | |
3452 | (lambda (ignore) | |
3453 | (exit-recursive-edit))) | |
3454 | (recursive-edit) | |
3455 | ;; Return nil to ask about BUF again. | |
3456 | nil) | |
3457 | "display the current buffer") | |
3458 | (?d diff-buffer-with-file | |
d97182ab | 3459 | "show difference to last saved version")) |
1eeae2a1 RS |
3460 | "ACTION-ALIST argument used in call to `map-y-or-n-p'.") |
3461 | (put 'save-some-buffers-action-alist 'risky-local-variable t) | |
3462 | ||
a1b0c2a7 RS |
3463 | (defvar buffer-save-without-query nil |
3464 | "Non-nil means `save-some-buffers' should save this buffer without asking.") | |
3465 | (make-variable-buffer-local 'buffer-save-without-query) | |
3466 | ||
ffc0e1ca | 3467 | (defun save-some-buffers (&optional arg pred) |
b4da00e9 | 3468 | "Save some modified file-visiting buffers. Asks user about each one. |
1eeae2a1 RS |
3469 | You can answer `y' to save, `n' not to save, `C-r' to look at the |
3470 | buffer in question with `view-buffer' before deciding or `d' to | |
126c9dda | 3471 | view the differences using `diff-buffer-with-file'. |
8fd9c174 | 3472 | |
5bbbceb1 | 3473 | Optional argument (the prefix) non-nil means save all with no questions. |
ffc0e1ca AS |
3474 | Optional second argument PRED determines which buffers are considered: |
3475 | If PRED is nil, all the file-visiting buffers are considered. | |
3476 | If PRED is t, then certain non-file buffers will also be considered. | |
3477 | If PRED is a zero-argument function, it indicates for each buffer whether | |
1eeae2a1 RS |
3478 | to consider it or not when called with that buffer current. |
3479 | ||
3480 | See `save-some-buffers-action-alist' if you want to | |
3481 | change the additional actions you can take on files." | |
b4da00e9 | 3482 | (interactive "P") |
907482b9 | 3483 | (save-window-excursion |
a1b0c2a7 RS |
3484 | (let* (queried some-automatic |
3485 | files-done abbrevs-done) | |
3486 | (dolist (buffer (buffer-list)) | |
3487 | ;; First save any buffers that we're supposed to save unconditionally. | |
3488 | ;; That way the following code won't ask about them. | |
3489 | (with-current-buffer buffer | |
3490 | (when (and buffer-save-without-query (buffer-modified-p)) | |
3491 | (setq some-automatic t) | |
3492 | (save-buffer)))) | |
3493 | ;; Ask about those buffers that merit it, | |
3494 | ;; and record the number thus saved. | |
3495 | (setq files-done | |
76d5492b RM |
3496 | (map-y-or-n-p |
3497 | (function | |
3498 | (lambda (buffer) | |
3499 | (and (buffer-modified-p buffer) | |
3500 | (not (buffer-base-buffer buffer)) | |
3501 | (or | |
3502 | (buffer-file-name buffer) | |
ffc0e1ca | 3503 | (and pred |
76d5492b RM |
3504 | (progn |
3505 | (set-buffer buffer) | |
3506 | (and buffer-offer-save (> (buffer-size) 0))))) | |
ffc0e1ca AS |
3507 | (or (not (functionp pred)) |
3508 | (with-current-buffer buffer (funcall pred))) | |
76d5492b RM |
3509 | (if arg |
3510 | t | |
3511 | (setq queried t) | |
3512 | (if (buffer-file-name buffer) | |
3513 | (format "Save file %s? " | |
3514 | (buffer-file-name buffer)) | |
3515 | (format "Save buffer %s? " | |
3516 | (buffer-name buffer))))))) | |
3517 | (function | |
3518 | (lambda (buffer) | |
3519 | (set-buffer buffer) | |
3520 | (save-buffer))) | |
3521 | (buffer-list) | |
3522 | '("buffer" "buffers" "save") | |
1eeae2a1 | 3523 | save-some-buffers-action-alist)) |
bf247b6e | 3524 | ;; Maybe to save abbrevs, and record whether |
a1b0c2a7 RS |
3525 | ;; we either saved them or asked to. |
3526 | (and save-abbrevs abbrevs-changed | |
3527 | (progn | |
3528 | (if (or arg | |
3529 | (eq save-abbrevs 'silently) | |
3530 | (y-or-n-p (format "Save abbrevs in %s? " | |
3531 | abbrev-file-name))) | |
3532 | (write-abbrev-file nil)) | |
3533 | ;; Don't keep bothering user if he says no. | |
3534 | (setq abbrevs-changed nil) | |
3535 | (setq abbrevs-done t))) | |
76d5492b | 3536 | (or queried (> files-done 0) abbrevs-done |
a1b0c2a7 RS |
3537 | (message (if some-automatic |
3538 | "(Some special files were saved without asking)" | |
3539 | "(No files need saving)")))))) | |
b4da00e9 RM |
3540 | \f |
3541 | (defun not-modified (&optional arg) | |
3542 | "Mark current buffer as unmodified, not needing to be saved. | |
a641f9a1 RM |
3543 | With prefix arg, mark buffer as modified, so \\[save-buffer] will save. |
3544 | ||
3545 | It is not a good idea to use this function in Lisp programs, because it | |
3546 | prints a message in the minibuffer. Instead, use `set-buffer-modified-p'." | |
b4da00e9 RM |
3547 | (interactive "P") |
3548 | (message (if arg "Modification-flag set" | |
3549 | "Modification-flag cleared")) | |
3550 | (set-buffer-modified-p arg)) | |
3551 | ||
3552 | (defun toggle-read-only (&optional arg) | |
3553 | "Change whether this buffer is visiting its file read-only. | |
2a9fe1e2 RS |
3554 | With arg, set read-only iff arg is positive. |
3555 | If visiting file read-only and `view-read-only' is non-nil, enter view mode." | |
b4da00e9 | 3556 | (interactive "P") |
c60ee5e7 | 3557 | (if (and arg |
d758359d AS |
3558 | (if (> (prefix-numeric-value arg) 0) buffer-read-only |
3559 | (not buffer-read-only))) ; If buffer-read-only is set correctly, | |
3560 | nil ; do nothing. | |
3561 | ;; Toggle. | |
3562 | (cond | |
3563 | ((and buffer-read-only view-mode) | |
3564 | (View-exit-and-edit) | |
3565 | (make-local-variable 'view-read-only) | |
3566 | (setq view-read-only t)) ; Must leave view mode. | |
3567 | ((and (not buffer-read-only) view-read-only | |
818286f4 SM |
3568 | ;; If view-mode is already active, `view-mode-enter' is a nop. |
3569 | (not view-mode) | |
d758359d AS |
3570 | (not (eq (get major-mode 'mode-class) 'special))) |
3571 | (view-mode-enter)) | |
3572 | (t (setq buffer-read-only (not buffer-read-only)) | |
3573 | (force-mode-line-update))) | |
3574 | (if (vc-backend buffer-file-name) | |
3575 | (message (substitute-command-keys | |
a5dd5f60 RS |
3576 | (concat "File is under version-control; " |
3577 | "use \\[vc-next-action] to check in/out")))))) | |
b4da00e9 | 3578 | |
912192d1 | 3579 | (defun insert-file (filename) |
b4da00e9 RM |
3580 | "Insert contents of file FILENAME into buffer after point. |
3581 | Set mark after the inserted text. | |
3582 | ||
3583 | This function is meant for the user to run interactively. | |
3584 | Don't call it from programs! Use `insert-file-contents' instead. | |
3585 | \(Its calling sequence is different; see its documentation)." | |
912192d1 | 3586 | (interactive "*fInsert file: ") |
3a64a3cf | 3587 | (insert-file-1 filename #'insert-file-contents)) |
b4da00e9 | 3588 | |
912192d1 | 3589 | (defun append-to-file (start end filename) |
b4da00e9 RM |
3590 | "Append the contents of the region to the end of file FILENAME. |
3591 | When called from a function, expects three arguments, | |
3592 | START, END and FILENAME. START and END are buffer positions | |
da30bf98 | 3593 | saying what text to write." |
912192d1 KH |
3594 | (interactive "r\nFAppend to file: ") |
3595 | (write-region start end filename t)) | |
b4da00e9 RM |
3596 | |
3597 | (defun file-newest-backup (filename) | |
3598 | "Return most recent backup file for FILENAME or nil if no backups exist." | |
ffc0e1ca AS |
3599 | ;; `make-backup-file-name' will get us the right directory for |
3600 | ;; ordinary or numeric backups. It might create a directory for | |
3601 | ;; backups as a side-effect, according to `backup-directory-alist'. | |
e31cfca5 | 3602 | (let* ((filename (file-name-sans-versions |
783bf210 | 3603 | (make-backup-file-name (expand-file-name filename)))) |
b4da00e9 RM |
3604 | (file (file-name-nondirectory filename)) |
3605 | (dir (file-name-directory filename)) | |
3606 | (comp (file-name-all-completions file dir)) | |
cf7e94a0 RS |
3607 | (newest nil) |
3608 | tem) | |
b4da00e9 | 3609 | (while comp |
ffc0e1ca | 3610 | (setq tem (pop comp)) |
cf7e94a0 RS |
3611 | (cond ((and (backup-file-name-p tem) |
3612 | (string= (file-name-sans-versions tem) file)) | |
3613 | (setq tem (concat dir tem)) | |
3614 | (if (or (null newest) | |
3615 | (file-newer-than-file-p tem newest)) | |
3616 | (setq newest tem))))) | |
b4da00e9 RM |
3617 | newest)) |
3618 | ||
3619 | (defun rename-uniquely () | |
3620 | "Rename current buffer to a similar name not already taken. | |
3621 | This function is useful for creating multiple shell process buffers | |
3622 | or multiple mail buffers, etc." | |
3623 | (interactive) | |
40eb8038 | 3624 | (save-match-data |
e0df3aef KH |
3625 | (let ((base-name (buffer-name))) |
3626 | (and (string-match "<[0-9]+>\\'" base-name) | |
3627 | (not (and buffer-file-name | |
3628 | (string= base-name | |
3629 | (file-name-nondirectory buffer-file-name)))) | |
3630 | ;; If the existing buffer name has a <NNN>, | |
3631 | ;; which isn't part of the file name (if any), | |
3632 | ;; then get rid of that. | |
3633 | (setq base-name (substring base-name 0 (match-beginning 0)))) | |
3634 | (rename-buffer (generate-new-buffer-name base-name)) | |
3941fe2c | 3635 | (force-mode-line-update)))) |
5bbbceb1 | 3636 | |
4e43240a | 3637 | (defun make-directory (dir &optional parents) |
5ce8bb89 RS |
3638 | "Create the directory DIR and any nonexistent parent dirs. |
3639 | Interactively, the default choice of directory to create | |
3640 | is the current default directory for file names. | |
0225ae5e | 3641 | That is useful when you have visited a file in a nonexistent directory. |
5ce8bb89 RS |
3642 | |
3643 | Noninteractively, the second (optional) argument PARENTS says whether | |
07703430 RS |
3644 | to create parent directories if they don't exist. Interactively, |
3645 | this happens by default." | |
5ce8bb89 RS |
3646 | (interactive |
3647 | (list (read-file-name "Make directory: " default-directory default-directory | |
3648 | nil nil) | |
3649 | t)) | |
ee291b46 RS |
3650 | ;; If default-directory is a remote directory, |
3651 | ;; make sure we find its make-directory handler. | |
3652 | (setq dir (expand-file-name dir)) | |
6eaebaa2 | 3653 | (let ((handler (find-file-name-handler dir 'make-directory))) |
4e43240a RS |
3654 | (if handler |
3655 | (funcall handler 'make-directory dir parents) | |
3656 | (if (not parents) | |
3657 | (make-directory-internal dir) | |
3658 | (let ((dir (directory-file-name (expand-file-name dir))) | |
3659 | create-list) | |
3660 | (while (not (file-exists-p dir)) | |
76d5492b | 3661 | (setq create-list (cons dir create-list) |
4e43240a RS |
3662 | dir (directory-file-name (file-name-directory dir)))) |
3663 | (while create-list | |
3664 | (make-directory-internal (car create-list)) | |
3665 | (setq create-list (cdr create-list)))))))) | |
b4da00e9 RM |
3666 | \f |
3667 | (put 'revert-buffer-function 'permanent-local t) | |
3668 | (defvar revert-buffer-function nil | |
0973d78b RS |
3669 | "Function to use to revert this buffer, or nil to do the default. |
3670 | The function receives two arguments IGNORE-AUTO and NOCONFIRM, | |
3671 | which are the arguments that `revert-buffer' received.") | |
b4da00e9 RM |
3672 | |
3673 | (put 'revert-buffer-insert-file-contents-function 'permanent-local t) | |
3674 | (defvar revert-buffer-insert-file-contents-function nil | |
3675 | "Function to use to insert contents when reverting this buffer. | |
3676 | Gets two args, first the nominal file name to use, | |
2df32500 RS |
3677 | and second, t if reading the auto-save file. |
3678 | ||
3679 | The function you specify is responsible for updating (or preserving) point.") | |
b4da00e9 | 3680 | |
b0dc9757 LT |
3681 | (defvar buffer-stale-function nil |
3682 | "Function to check whether a non-file buffer needs reverting. | |
3683 | This should be a function with one optional argument NOCONFIRM. | |
44dce0fb | 3684 | Auto Revert Mode passes t for NOCONFIRM. The function should return |
8b0b6932 LT |
3685 | non-nil if the buffer should be reverted. A return value of |
3686 | `fast' means that the need for reverting was not checked, but | |
3687 | that reverting the buffer is fast. The buffer is current when | |
3688 | this function is called. | |
b0dc9757 | 3689 | |
4f8453ae LT |
3690 | The idea behind the NOCONFIRM argument is that it should be |
3691 | non-nil if the buffer is going to be reverted without asking the | |
3692 | user. In such situations, one has to be careful with potentially | |
c90dcdd5 LT |
3693 | time consuming operations. |
3694 | ||
3695 | For more information on how this variable is used by Auto Revert mode, | |
3696 | see Info node `(emacs-xtra)Supporting additional buffers'.") | |
b0dc9757 | 3697 | |
5f76e7d4 KH |
3698 | (defvar before-revert-hook nil |
3699 | "Normal hook for `revert-buffer' to run before reverting. | |
3700 | If `revert-buffer-function' is used to override the normal revert | |
3701 | mechanism, this hook is not used.") | |
3702 | ||
3703 | (defvar after-revert-hook nil | |
3704 | "Normal hook for `revert-buffer' to run after reverting. | |
3705 | Note that the hook value that it runs is the value that was in effect | |
3706 | before reverting; that makes a difference if you have buffer-local | |
3707 | hook functions. | |
3708 | ||
3709 | If `revert-buffer-function' is used to override the normal revert | |
3710 | mechanism, this hook is not used.") | |
3711 | ||
1554c03b RS |
3712 | (defvar revert-buffer-internal-hook) |
3713 | ||
9a30563f | 3714 | (defun revert-buffer (&optional ignore-auto noconfirm preserve-modes) |
7e7c9c4e | 3715 | "Replace current buffer text with the text of the visited file on disk. |
b4da00e9 | 3716 | This undoes all changes since the file was visited or saved. |
8c0e7b73 JB |
3717 | With a prefix argument, offer to revert from latest auto-save file, if |
3718 | that is more recent than the visited file. | |
1ab31687 | 3719 | |
7e7c9c4e RS |
3720 | This command also works for special buffers that contain text which |
3721 | doesn't come from a file, but reflects some other data base instead: | |
4e163715 | 3722 | for example, Dired buffers and `buffer-list' buffers. In these cases, |
7e7c9c4e RS |
3723 | it reconstructs the buffer contents from the appropriate data base. |
3724 | ||
65ee6096 | 3725 | When called from Lisp, the first argument is IGNORE-AUTO; only offer |
1ab31687 JB |
3726 | to revert from the auto-save file when this is nil. Note that the |
3727 | sense of this argument is the reverse of the prefix argument, for the | |
3728 | sake of backward compatibility. IGNORE-AUTO is optional, defaulting | |
3729 | to nil. | |
3730 | ||
3731 | Optional second argument NOCONFIRM means don't ask for confirmation at | |
ffc0e1ca | 3732 | all. (The local variable `revert-without-query', if non-nil, prevents |
d1f04130 | 3733 | confirmation.) |
b4da00e9 | 3734 | |
5b2b26d5 RS |
3735 | Optional third argument PRESERVE-MODES non-nil means don't alter |
3736 | the files modes. Normally we reinitialize them using `normal-mode'. | |
3737 | ||
8c0e7b73 | 3738 | If the value of `revert-buffer-function' is non-nil, it is called to |
7e7c9c4e RS |
3739 | do all the work for this command. Otherwise, the hooks |
3740 | `before-revert-hook' and `after-revert-hook' are run at the beginning | |
3741 | and the end, and if `revert-buffer-insert-file-contents-function' is | |
3742 | non-nil, it is called instead of rereading visited file contents." | |
fb6208a6 | 3743 | |
1ab31687 JB |
3744 | ;; I admit it's odd to reverse the sense of the prefix argument, but |
3745 | ;; there is a lot of code out there which assumes that the first | |
3746 | ;; argument should be t to avoid consulting the auto-save file, and | |
3747 | ;; there's no straightforward way to encourage authors to notice a | |
3748 | ;; reversal of the argument sense. So I'm just changing the user | |
3749 | ;; interface, but leaving the programmatic interface the same. | |
e0867e99 | 3750 | (interactive (list (not current-prefix-arg))) |
b4da00e9 | 3751 | (if revert-buffer-function |
1ab31687 | 3752 | (funcall revert-buffer-function ignore-auto noconfirm) |
44dce0fb RS |
3753 | (with-current-buffer (or (buffer-base-buffer (current-buffer)) |
3754 | (current-buffer)) | |
3755 | (let* ((auto-save-p (and (not ignore-auto) | |
3756 | (recent-auto-save-p) | |
3757 | buffer-auto-save-file-name | |
3758 | (file-readable-p buffer-auto-save-file-name) | |
3759 | (y-or-n-p | |
3760 | "Buffer has been auto-saved recently. Revert from auto-save file? "))) | |
3761 | (file-name (if auto-save-p | |
3762 | buffer-auto-save-file-name | |
3763 | buffer-file-name))) | |
3764 | (cond ((null file-name) | |
3765 | (error "Buffer does not seem to be associated with any file")) | |
3766 | ((or noconfirm | |
3767 | (and (not (buffer-modified-p)) | |
3768 | (let ((tail revert-without-query) | |
3769 | (found nil)) | |
3770 | (while tail | |
3771 | (if (string-match (car tail) file-name) | |
3772 | (setq found t)) | |
3773 | (setq tail (cdr tail))) | |
3774 | found)) | |
3775 | (yes-or-no-p (format "Revert buffer from file %s? " | |
3776 | file-name))) | |
3777 | (run-hooks 'before-revert-hook) | |
3778 | ;; If file was backed up but has changed since, | |
3779 | ;; we shd make another backup. | |
3780 | (and (not auto-save-p) | |
3781 | (not (verify-visited-file-modtime (current-buffer))) | |
3782 | (setq buffer-backed-up nil)) | |
3783 | ;; Get rid of all undo records for this buffer. | |
3784 | (or (eq buffer-undo-list t) | |
3785 | (setq buffer-undo-list nil)) | |
3786 | ;; Effectively copy the after-revert-hook status, | |
3787 | ;; since after-find-file will clobber it. | |
3788 | (let ((global-hook (default-value 'after-revert-hook)) | |
3789 | (local-hook-p (local-variable-p 'after-revert-hook)) | |
3790 | (local-hook (and (local-variable-p 'after-revert-hook) | |
3791 | after-revert-hook))) | |
3792 | (let (buffer-read-only | |
3793 | ;; Don't make undo records for the reversion. | |
3794 | (buffer-undo-list t)) | |
3795 | (if revert-buffer-insert-file-contents-function | |
3796 | (funcall revert-buffer-insert-file-contents-function | |
3797 | file-name auto-save-p) | |
3798 | (if (not (file-exists-p file-name)) | |
3799 | (error (if buffer-file-number | |
3800 | "File %s no longer exists!" | |
3801 | "Cannot revert nonexistent file %s") | |
3802 | file-name)) | |
3803 | ;; Bind buffer-file-name to nil | |
3804 | ;; so that we don't try to lock the file. | |
3805 | (let ((buffer-file-name nil)) | |
3806 | (or auto-save-p | |
3807 | (unlock-buffer))) | |
3808 | (widen) | |
3809 | (let ((coding-system-for-read | |
3810 | ;; Auto-saved file shoule be read by Emacs' | |
3811 | ;; internal coding. | |
3812 | (if auto-save-p 'auto-save-coding | |
3813 | (or coding-system-for-read | |
3814 | buffer-file-coding-system-explicit)))) | |
3815 | ;; This force after-insert-file-set-coding | |
3816 | ;; (called from insert-file-contents) to set | |
3817 | ;; buffer-file-coding-system to a proper value. | |
3818 | (kill-local-variable 'buffer-file-coding-system) | |
3819 | ||
3820 | ;; Note that this preserves point in an intelligent way. | |
3821 | (if preserve-modes | |
3822 | (let ((buffer-file-format buffer-file-format)) | |
3823 | (insert-file-contents file-name (not auto-save-p) | |
3824 | nil nil t)) | |
3825 | (insert-file-contents file-name (not auto-save-p) | |
3826 | nil nil t))))) | |
3827 | ;; Recompute the truename in case changes in symlinks | |
3828 | ;; have changed the truename. | |
3829 | (setq buffer-file-truename | |
3830 | (abbreviate-file-name (file-truename buffer-file-name))) | |
3831 | (after-find-file nil nil t t preserve-modes) | |
3832 | ;; Run after-revert-hook as it was before we reverted. | |
3833 | (setq-default revert-buffer-internal-hook global-hook) | |
3834 | (if local-hook-p | |
3835 | (set (make-local-variable 'revert-buffer-internal-hook) | |
3836 | local-hook) | |
3837 | (kill-local-variable 'revert-buffer-internal-hook)) | |
3838 | (run-hooks 'revert-buffer-internal-hook)) | |
3839 | t)))))) | |
b4da00e9 | 3840 | |
64d18e8f RS |
3841 | (defun recover-this-file () |
3842 | "Recover the visited file--get contents from its last auto-save file." | |
3843 | (interactive) | |
3844 | (recover-file buffer-file-name)) | |
3845 | ||
b4da00e9 RM |
3846 | (defun recover-file (file) |
3847 | "Visit file FILE, but get contents from its last auto-save file." | |
10f7c7fc RS |
3848 | ;; Actually putting the file name in the minibuffer should be used |
3849 | ;; only rarely. | |
3850 | ;; Not just because users often use the default. | |
e1dadc17 | 3851 | (interactive "FRecover file: ") |
b4da00e9 | 3852 | (setq file (expand-file-name file)) |
f7da6740 | 3853 | (if (auto-save-file-name-p (file-name-nondirectory file)) |
4e163715 | 3854 | (error "%s is an auto-save file" (abbreviate-file-name file))) |
b4da00e9 RM |
3855 | (let ((file-name (let ((buffer-file-name file)) |
3856 | (make-auto-save-file-name)))) | |
945e1965 RS |
3857 | (cond ((if (file-exists-p file) |
3858 | (not (file-newer-than-file-p file-name file)) | |
3859 | (not (file-exists-p file-name))) | |
4e163715 SM |
3860 | (error "Auto-save file %s not current" |
3861 | (abbreviate-file-name file-name))) | |
b4da00e9 | 3862 | ((save-window-excursion |
ffc0e1ca AS |
3863 | (with-output-to-temp-buffer "*Directory*" |
3864 | (buffer-disable-undo standard-output) | |
3865 | (save-excursion | |
3866 | (let ((switches dired-listing-switches)) | |
3867 | (if (file-symlink-p file) | |
3868 | (setq switches (concat switches "L"))) | |
3869 | (set-buffer standard-output) | |
bc22fd18 EZ |
3870 | ;; Use insert-directory-safely, not insert-directory, |
3871 | ;; because these files might not exist. In particular, | |
3872 | ;; FILE might not exist if the auto-save file was for | |
3873 | ;; a buffer that didn't visit a file, such as "*mail*". | |
3874 | ;; The code in v20.x called `ls' directly, so we need | |
3875 | ;; to emulate what `ls' did in that case. | |
3876 | (insert-directory-safely file switches) | |
3877 | (insert-directory-safely file-name switches)))) | |
b4da00e9 RM |
3878 | (yes-or-no-p (format "Recover auto save file %s? " file-name))) |
3879 | (switch-to-buffer (find-file-noselect file t)) | |
82d0954a | 3880 | (let ((buffer-read-only nil) |
1e87edf5 KH |
3881 | ;; Keep the current buffer-file-coding-system. |
3882 | (coding-system buffer-file-coding-system) | |
77619f8e KH |
3883 | ;; Auto-saved file shoule be read with special coding. |
3884 | (coding-system-for-read 'auto-save-coding)) | |
b4da00e9 | 3885 | (erase-buffer) |
1e87edf5 KH |
3886 | (insert-file-contents file-name nil) |
3887 | (set-buffer-file-coding-system coding-system)) | |
8cfb9d46 | 3888 | (after-find-file nil nil t)) |
ffa7ab70 | 3889 | (t (error "Recover-file cancelled"))))) |
b4da00e9 | 3890 | |
6598027d | 3891 | (defun recover-session () |
9aee5392 RS |
3892 | "Recover auto save files from a previous Emacs session. |
3893 | This command first displays a Dired buffer showing you the | |
3894 | previous sessions that you could recover from. | |
3895 | To choose one, move point to the proper line and then type C-c C-c. | |
3896 | Then you'll be asked about a number of files to recover." | |
3897 | (interactive) | |
363a5030 RS |
3898 | (if (null auto-save-list-file-prefix) |
3899 | (error "You set `auto-save-list-file-prefix' to disable making session files")) | |
ffc0e1ca AS |
3900 | (let ((dir (file-name-directory auto-save-list-file-prefix))) |
3901 | (unless (file-directory-p dir) | |
194600a8 JPW |
3902 | (make-directory dir t)) |
3903 | (unless (directory-files dir nil | |
3904 | (concat "\\`" (regexp-quote | |
3905 | (file-name-nondirectory | |
3906 | auto-save-list-file-prefix))) | |
3907 | t) | |
3908 | (error "No previous sessions to recover"))) | |
6f4983e6 | 3909 | (let ((ls-lisp-support-shell-wildcards t)) |
7b3478a5 RS |
3910 | (dired (concat auto-save-list-file-prefix "*") |
3911 | (concat dired-listing-switches "t"))) | |
05e076c7 AS |
3912 | (save-excursion |
3913 | (goto-char (point-min)) | |
3914 | (or (looking-at " Move to the session you want to recover,") | |
3915 | (let ((inhibit-read-only t)) | |
3916 | ;; Each line starts with a space | |
3917 | ;; so that Font Lock mode won't highlight the first character. | |
3918 | (insert " Move to the session you want to recover,\n" | |
3919 | " then type C-c C-c to select it.\n\n" | |
3920 | " You can also delete some of these files;\n" | |
3921 | " type d on a line to mark that file for deletion.\n\n")))) | |
9aee5392 | 3922 | (use-local-map (nconc (make-sparse-keymap) (current-local-map))) |
80280bb7 | 3923 | (define-key (current-local-map) "\C-c\C-c" 'recover-session-finish)) |
9aee5392 | 3924 | |
80280bb7 | 3925 | (defun recover-session-finish () |
9aee5392 RS |
3926 | "Choose one saved session to recover auto-save files from. |
3927 | This command is used in the special Dired buffer created by | |
80280bb7 | 3928 | \\[recover-session]." |
9aee5392 RS |
3929 | (interactive) |
3930 | ;; Get the name of the session file to recover from. | |
3931 | (let ((file (dired-get-filename)) | |
953a03b2 | 3932 | files |
9aee5392 | 3933 | (buffer (get-buffer-create " *recover*"))) |
c11032b9 | 3934 | (dired-unmark 1) |
033ef863 | 3935 | (dired-do-flagged-delete t) |
9aee5392 RS |
3936 | (unwind-protect |
3937 | (save-excursion | |
3938 | ;; Read in the auto-save-list file. | |
3939 | (set-buffer buffer) | |
3940 | (erase-buffer) | |
3941 | (insert-file-contents file) | |
953a03b2 RS |
3942 | ;; Loop thru the text of that file |
3943 | ;; and get out the names of the files to recover. | |
3944 | (while (not (eobp)) | |
3945 | (let (thisfile autofile) | |
3946 | (if (eolp) | |
3947 | ;; This is a pair of lines for a non-file-visiting buffer. | |
3948 | ;; Get the auto-save file name and manufacture | |
3949 | ;; a "visited file name" from that. | |
3950 | (progn | |
3951 | (forward-line 1) | |
259be4e6 JB |
3952 | ;; If there is no auto-save file name, the |
3953 | ;; auto-save-list file is probably corrupted. | |
3954 | (unless (eolp) | |
3955 | (setq autofile | |
3956 | (buffer-substring-no-properties | |
3957 | (point) | |
3958 | (save-excursion | |
3959 | (end-of-line) | |
3960 | (point)))) | |
3961 | (setq thisfile | |
3962 | (expand-file-name | |
3963 | (substring | |
3964 | (file-name-nondirectory autofile) | |
3965 | 1 -1) | |
3966 | (file-name-directory autofile)))) | |
953a03b2 RS |
3967 | (forward-line 1)) |
3968 | ;; This pair of lines is a file-visiting | |
3969 | ;; buffer. Use the visited file name. | |
3970 | (progn | |
3971 | (setq thisfile | |
3972 | (buffer-substring-no-properties | |
3973 | (point) (progn (end-of-line) (point)))) | |
3974 | (forward-line 1) | |
3975 | (setq autofile | |
3976 | (buffer-substring-no-properties | |
3977 | (point) (progn (end-of-line) (point)))) | |
3978 | (forward-line 1))) | |
3979 | ;; Ignore a file if its auto-save file does not exist now. | |
259be4e6 | 3980 | (if (and autofile (file-exists-p autofile)) |
953a03b2 RS |
3981 | (setq files (cons thisfile files))))) |
3982 | (setq files (nreverse files)) | |
945e1965 RS |
3983 | ;; The file contains a pair of line for each auto-saved buffer. |
3984 | ;; The first line of the pair contains the visited file name | |
3985 | ;; or is empty if the buffer was not visiting a file. | |
3986 | ;; The second line is the auto-save file name. | |
953a03b2 RS |
3987 | (if files |
3988 | (map-y-or-n-p "Recover %s? " | |
3989 | (lambda (file) | |
3990 | (condition-case nil | |
3991 | (save-excursion (recover-file file)) | |
76d5492b | 3992 | (error |
953a03b2 RS |
3993 | "Failed to recover `%s'" file))) |
3994 | files | |
3995 | '("file" "files" "recover")) | |
3996 | (message "No files can be recovered from this session now"))) | |
9aee5392 RS |
3997 | (kill-buffer buffer)))) |
3998 | ||
73ba610a | 3999 | (defun kill-some-buffers (&optional list) |
243a3ae0 | 4000 | "Kill some buffers. Asks the user whether to kill each one of them. |
bb8eaf67 | 4001 | Non-interactively, if optional argument LIST is non-nil, it |
243a3ae0 | 4002 | specifies the list of buffers to kill, asking for approval for each one." |
b4da00e9 | 4003 | (interactive) |
73ba610a RS |
4004 | (if (null list) |
4005 | (setq list (buffer-list))) | |
4006 | (while list | |
4007 | (let* ((buffer (car list)) | |
4008 | (name (buffer-name buffer))) | |
cbca0a4b RS |
4009 | (and name ; Can be nil for an indirect buffer |
4010 | ; if we killed the base buffer. | |
4011 | (not (string-equal name "")) | |
73ba610a RS |
4012 | (/= (aref name 0) ? ) |
4013 | (yes-or-no-p | |
4014 | (format "Buffer %s %s. Kill? " | |
4015 | name | |
4016 | (if (buffer-modified-p buffer) | |
4017 | "HAS BEEN EDITED" "is unmodified"))) | |
4018 | (kill-buffer buffer))) | |
4019 | (setq list (cdr list)))) | |
b4da00e9 RM |
4020 | \f |
4021 | (defun auto-save-mode (arg) | |
4022 | "Toggle auto-saving of contents of current buffer. | |
f3e23606 | 4023 | With prefix argument ARG, turn auto-saving on if positive, else off." |
b4da00e9 RM |
4024 | (interactive "P") |
4025 | (setq buffer-auto-save-file-name | |
4026 | (and (if (null arg) | |
74b9c2af | 4027 | (or (not buffer-auto-save-file-name) |
4e0c8650 | 4028 | ;; If auto-save is off because buffer has shrunk, |
74b9c2af RS |
4029 | ;; then toggling should turn it on. |
4030 | (< buffer-saved-size 0)) | |
b4da00e9 RM |
4031 | (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) |
4032 | (if (and buffer-file-name auto-save-visited-file-name | |
4033 | (not buffer-read-only)) | |
4034 | buffer-file-name | |
4035 | (make-auto-save-file-name)))) | |
0b7f1ef2 RS |
4036 | ;; If -1 was stored here, to temporarily turn off saving, |
4037 | ;; turn it back on. | |
4038 | (and (< buffer-saved-size 0) | |
4039 | (setq buffer-saved-size 0)) | |
b4da00e9 RM |
4040 | (if (interactive-p) |
4041 | (message "Auto-save %s (in this buffer)" | |
4042 | (if buffer-auto-save-file-name "on" "off"))) | |
4043 | buffer-auto-save-file-name) | |
4044 | ||
4045 | (defun rename-auto-save-file () | |
4046 | "Adjust current buffer's auto save file name for current conditions. | |
4047 | Also rename any existing auto save file, if it was made in this session." | |
4048 | (let ((osave buffer-auto-save-file-name)) | |
4049 | (setq buffer-auto-save-file-name | |
4050 | (make-auto-save-file-name)) | |
4051 | (if (and osave buffer-auto-save-file-name | |
4052 | (not (string= buffer-auto-save-file-name buffer-file-name)) | |
4053 | (not (string= buffer-auto-save-file-name osave)) | |
4054 | (file-exists-p osave) | |
4055 | (recent-auto-save-p)) | |
4056 | (rename-file osave buffer-auto-save-file-name t)))) | |
4057 | ||
4058 | (defun make-auto-save-file-name () | |
4059 | "Return file name to use for auto-saves of current buffer. | |
4060 | Does not consider `auto-save-visited-file-name' as that variable is checked | |
4061 | before calling this function. You can redefine this for customization. | |
4062 | See also `auto-save-file-name-p'." | |
4063 | (if buffer-file-name | |
ffc0e1ca AS |
4064 | (let ((list auto-save-file-name-transforms) |
4065 | (filename buffer-file-name) | |
a0b60c33 | 4066 | result uniq) |
ffc0e1ca AS |
4067 | ;; Apply user-specified translations |
4068 | ;; to the file name. | |
4069 | (while (and list (not result)) | |
4070 | (if (string-match (car (car list)) filename) | |
4071 | (setq result (replace-match (cadr (car list)) t nil | |
a0b60c33 | 4072 | filename) |
38eea7c7 | 4073 | uniq (car (cddr (car list))))) |
ffc0e1ca | 4074 | (setq list (cdr list))) |
a0b60c33 | 4075 | (if result |
3c4a7cf3 RS |
4076 | (if uniq |
4077 | (setq filename (concat | |
4078 | (file-name-directory result) | |
4079 | (subst-char-in-string | |
d7b6ca4a | 4080 | ?/ ?! |
3c4a7cf3 RS |
4081 | (replace-regexp-in-string "!" "!!" |
4082 | filename)))) | |
4083 | (setq filename result))) | |
1e57a696 EZ |
4084 | (setq result |
4085 | (if (and (eq system-type 'ms-dos) | |
4086 | (not (msdos-long-file-names))) | |
4087 | ;; We truncate the file name to DOS 8+3 limits | |
4088 | ;; before doing anything else, because the regexp | |
4089 | ;; passed to string-match below cannot handle | |
4090 | ;; extensions longer than 3 characters, multiple | |
4091 | ;; dots, and other atrocities. | |
4092 | (let ((fn (dos-8+3-filename | |
4093 | (file-name-nondirectory buffer-file-name)))) | |
4094 | (string-match | |
4095 | "\\`\\([^.]+\\)\\(\\.\\(..?\\)?.?\\|\\)\\'" | |
4096 | fn) | |
4097 | (concat (file-name-directory buffer-file-name) | |
4098 | "#" (match-string 1 fn) | |
4099 | "." (match-string 3 fn) "#")) | |
4100 | (concat (file-name-directory filename) | |
4101 | "#" | |
4102 | (file-name-nondirectory filename) | |
4103 | "#"))) | |
4104 | ;; Make sure auto-save file names don't contain characters | |
4105 | ;; invalid for the underlying filesystem. | |
4106 | (if (and (memq system-type '(ms-dos windows-nt)) | |
4107 | ;; Don't modify remote (ange-ftp) filenames | |
4108 | (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" result))) | |
4109 | (convert-standard-filename result) | |
4110 | result)) | |
0a1763b4 RS |
4111 | |
4112 | ;; Deal with buffers that don't have any associated files. (Mail | |
4113 | ;; mode tends to create a good number of these.) | |
4114 | ||
7d483e8c | 4115 | (let ((buffer-name (buffer-name)) |
ff5c7181 | 4116 | (limit 0) |
77d18896 | 4117 | file-name) |
c3348e10 RS |
4118 | ;; Eliminate all slashes and backslashes by |
4119 | ;; replacing them with sequences that start with %. | |
4120 | ;; Quote % also, to keep distinct names distinct. | |
4121 | (while (string-match "[/\\%]" buffer-name limit) | |
4122 | (let* ((character (aref buffer-name (match-beginning 0))) | |
4123 | (replacement | |
4124 | (cond ((eq character ?%) "%%") | |
4125 | ((eq character ?/) "%+") | |
4126 | ((eq character ?\\) "%-")))) | |
4127 | (setq buffer-name (replace-match replacement t t buffer-name)) | |
4128 | (setq limit (1+ (match-end 0))))) | |
a8abaf83 | 4129 | ;; Generate the file name. |
ff5c7181 RS |
4130 | (setq file-name |
4131 | (make-temp-file | |
4132 | (let ((fname | |
4133 | (expand-file-name | |
4134 | (format "#%s#" buffer-name) | |
4135 | ;; Try a few alternative directories, to get one we can | |
4136 | ;; write it. | |
4137 | (cond | |
4138 | ((file-writable-p default-directory) default-directory) | |
4139 | ((file-writable-p "/var/tmp/") "/var/tmp/") | |
4140 | ("~/"))))) | |
4141 | (if (and (memq system-type '(ms-dos windows-nt)) | |
4142 | ;; Don't modify remote (ange-ftp) filenames | |
4143 | (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" fname))) | |
4144 | ;; The call to convert-standard-filename is in case | |
4145 | ;; buffer-name includes characters not allowed by the | |
4146 | ;; DOS/Windows filesystems. make-temp-file writes to the | |
4147 | ;; file it creates, so we must fix the file name _before_ | |
4148 | ;; make-temp-file is called. | |
4149 | (convert-standard-filename fname) | |
4150 | fname)) | |
4151 | nil "#")) | |
4152 | ;; make-temp-file creates the file, | |
4153 | ;; but we don't want it to exist until we do an auto-save. | |
4154 | (condition-case () | |
4155 | (delete-file file-name) | |
4156 | (file-error nil)) | |
4157 | file-name))) | |
b4da00e9 RM |
4158 | |
4159 | (defun auto-save-file-name-p (filename) | |
4160 | "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'. | |
4161 | FILENAME should lack slashes. You can redefine this for customization." | |
4162 | (string-match "^#.*#$" filename)) | |
4163 | \f | |
6f4983e6 RS |
4164 | (defun wildcard-to-regexp (wildcard) |
4165 | "Given a shell file name pattern WILDCARD, return an equivalent regexp. | |
4166 | The generated regexp will match a filename iff the filename | |
4167 | matches that wildcard according to shell rules. Only wildcards known | |
4168 | by `sh' are supported." | |
4169 | (let* ((i (string-match "[[.*+\\^$?]" wildcard)) | |
4170 | ;; Copy the initial run of non-special characters. | |
4171 | (result (substring wildcard 0 i)) | |
4172 | (len (length wildcard))) | |
4173 | ;; If no special characters, we're almost done. | |
4174 | (if i | |
4175 | (while (< i len) | |
4176 | (let ((ch (aref wildcard i)) | |
4177 | j) | |
4178 | (setq | |
4179 | result | |
4180 | (concat result | |
4181 | (cond | |
7e7c9c4e RS |
4182 | ((and (eq ch ?\[) |
4183 | (< (1+ i) len) | |
4184 | (eq (aref wildcard (1+ i)) ?\])) | |
4185 | "\\[") | |
6f4983e6 RS |
4186 | ((eq ch ?\[) ; [...] maps to regexp char class |
4187 | (progn | |
4188 | (setq i (1+ i)) | |
4189 | (concat | |
4190 | (cond | |
4191 | ((eq (aref wildcard i) ?!) ; [!...] -> [^...] | |
4192 | (progn | |
4193 | (setq i (1+ i)) | |
4194 | (if (eq (aref wildcard i) ?\]) | |
4195 | (progn | |
4196 | (setq i (1+ i)) | |
4197 | "[^]") | |
4198 | "[^"))) | |
4199 | ((eq (aref wildcard i) ?^) | |
4200 | ;; Found "[^". Insert a `\0' character | |
4201 | ;; (which cannot happen in a filename) | |
4202 | ;; into the character class, so that `^' | |
4203 | ;; is not the first character after `[', | |
4204 | ;; and thus non-special in a regexp. | |
4205 | (progn | |
4206 | (setq i (1+ i)) | |
4207 | "[\000^")) | |
4208 | ((eq (aref wildcard i) ?\]) | |
4209 | ;; I don't think `]' can appear in a | |
4210 | ;; character class in a wildcard, but | |
4211 | ;; let's be general here. | |
4212 | (progn | |
4213 | (setq i (1+ i)) | |
4214 | "[]")) | |
4215 | (t "[")) | |
4216 | (prog1 ; copy everything upto next `]'. | |
4217 | (substring wildcard | |
4218 | i | |
4219 | (setq j (string-match | |
4220 | "]" wildcard i))) | |
4221 | (setq i (if j (1- j) (1- len))))))) | |
4222 | ((eq ch ?.) "\\.") | |
4223 | ((eq ch ?*) "[^\000]*") | |
4224 | ((eq ch ?+) "\\+") | |
4225 | ((eq ch ?^) "\\^") | |
4226 | ((eq ch ?$) "\\$") | |
4227 | ((eq ch ?\\) "\\\\") ; probably cannot happen... | |
4228 | ((eq ch ??) "[^\000]") | |
4229 | (t (char-to-string ch))))) | |
4230 | (setq i (1+ i))))) | |
4231 | ;; Shell wildcards should match the entire filename, | |
4232 | ;; not its part. Make the regexp say so. | |
4233 | (concat "\\`" result "\\'"))) | |
4234 | \f | |
21540597 | 4235 | (defcustom list-directory-brief-switches |
b4da00e9 | 4236 | (if (eq system-type 'vax-vms) "" "-CF") |
ffc0e1ca | 4237 | "*Switches for `list-directory' to pass to `ls' for brief listing." |
21540597 RS |
4238 | :type 'string |
4239 | :group 'dired) | |
b4da00e9 | 4240 | |
21540597 | 4241 | (defcustom list-directory-verbose-switches |
b4da00e9 RM |
4242 | (if (eq system-type 'vax-vms) |
4243 | "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)" | |
4244 | "-l") | |
ffc0e1ca | 4245 | "*Switches for `list-directory' to pass to `ls' for verbose listing." |
21540597 RS |
4246 | :type 'string |
4247 | :group 'dired) | |
b4da00e9 | 4248 | |
5de148a2 RS |
4249 | (defun file-expand-wildcards (pattern &optional full) |
4250 | "Expand wildcard pattern PATTERN. | |
4db2a7de RS |
4251 | This returns a list of file names which match the pattern. |
4252 | ||
814af837 | 4253 | If PATTERN is written as an absolute file name, |
4db2a7de RS |
4254 | the values are absolute also. |
4255 | ||
4256 | If PATTERN is written as a relative file name, it is interpreted | |
4257 | relative to the current default directory, `default-directory'. | |
4258 | The file names returned are normally also relative to the current | |
4259 | default directory. However, if FULL is non-nil, they are absolute." | |
032388f3 RS |
4260 | (save-match-data |
4261 | (let* ((nondir (file-name-nondirectory pattern)) | |
4262 | (dirpart (file-name-directory pattern)) | |
4263 | ;; A list of all dirs that DIRPART specifies. | |
4264 | ;; This can be more than one dir | |
4265 | ;; if DIRPART contains wildcards. | |
4266 | (dirs (if (and dirpart (string-match "[[*?]" dirpart)) | |
4267 | (mapcar 'file-name-as-directory | |
4268 | (file-expand-wildcards (directory-file-name dirpart))) | |
4269 | (list dirpart))) | |
4270 | contents) | |
4271 | (while dirs | |
4272 | (when (or (null (car dirs)) ; Possible if DIRPART is not wild. | |
4273 | (file-directory-p (directory-file-name (car dirs)))) | |
4274 | (let ((this-dir-contents | |
4275 | ;; Filter out "." and ".." | |
4276 | (delq nil | |
4277 | (mapcar #'(lambda (name) | |
4278 | (unless (string-match "\\`\\.\\.?\\'" | |
4279 | (file-name-nondirectory name)) | |
4280 | name)) | |
4281 | (directory-files (or (car dirs) ".") full | |
4282 | (wildcard-to-regexp nondir)))))) | |
4283 | (setq contents | |
4284 | (nconc | |
4285 | (if (and (car dirs) (not full)) | |
4286 | (mapcar (function (lambda (name) (concat (car dirs) name))) | |
4287 | this-dir-contents) | |
4288 | this-dir-contents) | |
4289 | contents)))) | |
4290 | (setq dirs (cdr dirs))) | |
4291 | contents))) | |
5de148a2 | 4292 | |
b4da00e9 RM |
4293 | (defun list-directory (dirname &optional verbose) |
4294 | "Display a list of files in or matching DIRNAME, a la `ls'. | |
4295 | DIRNAME is globbed by the shell if necessary. | |
4296 | Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. | |
4297 | Actions controlled by variables `list-directory-brief-switches' | |
4298 | and `list-directory-verbose-switches'." | |
4299 | (interactive (let ((pfx current-prefix-arg)) | |
4300 | (list (read-file-name (if pfx "List directory (verbose): " | |
4301 | "List directory (brief): ") | |
4302 | nil default-directory nil) | |
4303 | pfx))) | |
4304 | (let ((switches (if verbose list-directory-verbose-switches | |
84905190 RS |
4305 | list-directory-brief-switches)) |
4306 | buffer) | |
b4da00e9 RM |
4307 | (or dirname (setq dirname default-directory)) |
4308 | (setq dirname (expand-file-name dirname)) | |
4309 | (with-output-to-temp-buffer "*Directory*" | |
84905190 | 4310 | (setq buffer standard-output) |
b4da00e9 RM |
4311 | (buffer-disable-undo standard-output) |
4312 | (princ "Directory ") | |
4313 | (princ dirname) | |
4314 | (terpri) | |
c3554e95 RS |
4315 | (save-excursion |
4316 | (set-buffer "*Directory*") | |
4317 | (let ((wildcard (not (file-directory-p dirname)))) | |
84905190 RS |
4318 | (insert-directory dirname switches wildcard (not wildcard))))) |
4319 | ;; Finishing with-output-to-temp-buffer seems to clobber default-directory. | |
4320 | (with-current-buffer buffer | |
4321 | (setq default-directory | |
4322 | (if (file-directory-p dirname) | |
4323 | (file-name-as-directory dirname) | |
4324 | (file-name-directory dirname)))))) | |
c3554e95 | 4325 | |
ffc0e1ca AS |
4326 | (defun shell-quote-wildcard-pattern (pattern) |
4327 | "Quote characters special to the shell in PATTERN, leave wildcards alone. | |
4328 | ||
4329 | PATTERN is assumed to represent a file-name wildcard suitable for the | |
4330 | underlying filesystem. For Unix and GNU/Linux, the characters from the | |
4331 | set [ \\t\\n;<>&|()#$] are quoted with a backslash; for DOS/Windows, all | |
4332 | the parts of the pattern which don't include wildcard characters are | |
4333 | quoted with double quotes. | |
4334 | Existing quote characters in PATTERN are left alone, so you can pass | |
4335 | PATTERN that already quotes some of the special characters." | |
4336 | (save-match-data | |
4337 | (cond | |
c60ee5e7 | 4338 | ((memq system-type '(ms-dos windows-nt cygwin)) |
ffc0e1ca AS |
4339 | ;; DOS/Windows don't allow `"' in file names. So if the |
4340 | ;; argument has quotes, we can safely assume it is already | |
4341 | ;; quoted by the caller. | |
4342 | (if (or (string-match "[\"]" pattern) | |
4343 | ;; We quote [&()#$'] in case their shell is a port of a | |
4344 | ;; Unixy shell. We quote [,=+] because stock DOS and | |
4345 | ;; Windows shells require that in some cases, such as | |
4346 | ;; passing arguments to batch files that use positional | |
4347 | ;; arguments like %1. | |
4348 | (not (string-match "[ \t;&()#$',=+]" pattern))) | |
4349 | pattern | |
4350 | (let ((result "\"") | |
4351 | (beg 0) | |
4352 | end) | |
4353 | (while (string-match "[*?]+" pattern beg) | |
4354 | (setq end (match-beginning 0) | |
4355 | result (concat result (substring pattern beg end) | |
4356 | "\"" | |
4357 | (substring pattern end (match-end 0)) | |
4358 | "\"") | |
4359 | beg (match-end 0))) | |
4360 | (concat result (substring pattern beg) "\"")))) | |
4361 | (t | |
4362 | (let ((beg 0)) | |
4363 | (while (string-match "[ \t\n;<>&|()#$]" pattern beg) | |
4364 | (setq pattern | |
4365 | (concat (substring pattern 0 (match-beginning 0)) | |
4366 | "\\" | |
4367 | (substring pattern (match-beginning 0))) | |
4368 | beg (1+ (match-end 0))))) | |
4369 | pattern)))) | |
4370 | ||
4371 | ||
c3554e95 RS |
4372 | (defvar insert-directory-program "ls" |
4373 | "Absolute or relative name of the `ls' program used by `insert-directory'.") | |
4374 | ||
f4d04672 RS |
4375 | (defcustom directory-free-space-program "df" |
4376 | "*Program to get the amount of free space on a file system. | |
4377 | We assume the output has the format of `df'. | |
4378 | The value of this variable must be just a command name or file name; | |
4379 | if you want to specify options, use `directory-free-space-args'. | |
4380 | ||
01b26b90 EZ |
4381 | A value of nil disables this feature. |
4382 | ||
4383 | If the function `file-system-info' is defined, it is always used in | |
4384 | preference to the program given by this variable." | |
f4d04672 RS |
4385 | :type '(choice (string :tag "Program") (const :tag "None" nil)) |
4386 | :group 'dired) | |
4387 | ||
525fdbc9 AS |
4388 | (defcustom directory-free-space-args |
4389 | (if (eq system-type 'darwin) "-k" "-Pk") | |
f4d04672 RS |
4390 | "*Options to use when running `directory-free-space-program'." |
4391 | :type 'string | |
4392 | :group 'dired) | |
4393 | ||
01b26b90 EZ |
4394 | (defun get-free-disk-space (dir) |
4395 | "Return the mount of free space on directory DIR's file system. | |
4396 | The result is a string that gives the number of free 1KB blocks, | |
4397 | or nil if the system call or the program which retrieve the infornmation | |
4398 | fail. | |
4399 | ||
4400 | This function calls `file-system-info' if it is available, or invokes the | |
4401 | program specified by `directory-free-space-program' if that is non-nil." | |
4402 | ;; Try to find the number of free blocks. Non-Posix systems don't | |
4403 | ;; always have df, but might have an equivalent system call. | |
4404 | (if (fboundp 'file-system-info) | |
4405 | (let ((fsinfo (file-system-info dir))) | |
4406 | (if fsinfo | |
4407 | (format "%.0f" (/ (nth 2 fsinfo) 1024)))) | |
4408 | (save-match-data | |
4409 | (with-temp-buffer | |
4410 | (when (and directory-free-space-program | |
15502042 EZ |
4411 | (eq 0 (call-process directory-free-space-program |
4412 | nil t nil | |
4413 | directory-free-space-args | |
4414 | dir))) | |
01b26b90 EZ |
4415 | ;; Usual format is a header line followed by a line of |
4416 | ;; numbers. | |
4417 | (goto-char (point-min)) | |
4418 | (forward-line 1) | |
4419 | (if (not (eobp)) | |
4420 | (progn | |
4421 | ;; Move to the end of the "available blocks" number. | |
4422 | (skip-chars-forward "^ \t") | |
4423 | (forward-word 3) | |
4424 | ;; Copy it into AVAILABLE. | |
4425 | (let ((end (point))) | |
4426 | (forward-word -1) | |
4427 | (buffer-substring (point) end))))))))) | |
4428 | ||
4429 | ||
a1b0c2a7 RS |
4430 | (defvar insert-directory-ls-version 'unknown) |
4431 | ||
c3554e95 RS |
4432 | ;; insert-directory |
4433 | ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and | |
4434 | ;; FULL-DIRECTORY-P is nil. | |
4435 | ;; The single line of output must display FILE's name as it was | |
4436 | ;; given, namely, an absolute path name. | |
4437 | ;; - must insert exactly one line for each file if WILDCARD or | |
4438 | ;; FULL-DIRECTORY-P is t, plus one optional "total" line | |
4439 | ;; before the file lines, plus optional text after the file lines. | |
4440 | ;; Lines are delimited by "\n", so filenames containing "\n" are not | |
4441 | ;; allowed. | |
4442 | ;; File lines should display the basename. | |
4443 | ;; - must be consistent with | |
4444 | ;; - functions dired-move-to-filename, (these two define what a file line is) | |
4445 | ;; dired-move-to-end-of-filename, | |
4446 | ;; dired-between-files, (shortcut for (not (dired-move-to-filename))) | |
4447 | ;; dired-insert-headerline | |
4448 | ;; dired-after-subdir-garbage (defines what a "total" line is) | |
4449 | ;; - variable dired-subdir-regexp | |
1fc85dae KG |
4450 | ;; - may be passed "--dired" as the first argument in SWITCHES. |
4451 | ;; Filename handlers might have to remove this switch if their | |
4452 | ;; "ls" command does not support it. | |
c3554e95 | 4453 | (defun insert-directory (file switches &optional wildcard full-directory-p) |
a18b7c81 | 4454 | "Insert directory listing for FILE, formatted according to SWITCHES. |
c3554e95 | 4455 | Leaves point after the inserted text. |
8f8607be LT |
4456 | SWITCHES may be a string of options, or a list of strings |
4457 | representing individual options. | |
c3554e95 RS |
4458 | Optional third arg WILDCARD means treat FILE as shell wildcard. |
4459 | Optional fourth arg FULL-DIRECTORY-P means file is a directory and | |
4460 | switches do not contain `d', so that a full listing is expected. | |
4461 | ||
4462 | This works by running a directory listing program | |
406e12d9 | 4463 | whose name is in the variable `insert-directory-program'. |
8f8607be LT |
4464 | If WILDCARD, it also runs the shell specified by `shell-file-name'. |
4465 | ||
60ce7e3e | 4466 | When SWITCHES contains the long `--dired' option, this function |
8f8607be LT |
4467 | treats it specially, for the sake of dired. However, the |
4468 | normally equivalent short `-D' option is just passed on to | |
4469 | `insert-directory-program', as any other option." | |
c870ab8e | 4470 | ;; We need the directory in order to find the right handler. |
d2473540 AS |
4471 | (let ((handler (find-file-name-handler (expand-file-name file) |
4472 | 'insert-directory))) | |
ebad92dc | 4473 | (if handler |
c3554e95 RS |
4474 | (funcall handler 'insert-directory file switches |
4475 | wildcard full-directory-p) | |
b4da00e9 | 4476 | (if (eq system-type 'vax-vms) |
c3554e95 | 4477 | (vms-read-directory file switches (current-buffer)) |
818286f4 | 4478 | (let (result (beg (point))) |
ebad92dc RS |
4479 | |
4480 | ;; Read the actual directory using `insert-directory-program'. | |
4481 | ;; RESULT gets the status code. | |
99f01c91 KH |
4482 | (let* (;; We at first read by no-conversion, then after |
4483 | ;; putting text property `dired-filename, decode one | |
4484 | ;; bunch by one to preserve that property. | |
4485 | (coding-system-for-read 'no-conversion) | |
4486 | ;; This is to control encoding the arguments in call-process. | |
c60ee5e7 | 4487 | (coding-system-for-write |
82e22b57 KH |
4488 | (and enable-multibyte-characters |
4489 | (or file-name-coding-system | |
99f01c91 | 4490 | default-file-name-coding-system)))) |
ebad92dc RS |
4491 | (setq result |
4492 | (if wildcard | |
4493 | ;; Run ls in the directory part of the file pattern | |
4494 | ;; using the last component as argument. | |
4495 | (let ((default-directory | |
4496 | (if (file-name-absolute-p file) | |
4497 | (file-name-directory file) | |
4498 | (file-name-directory (expand-file-name file)))) | |
4499 | (pattern (file-name-nondirectory file))) | |
4500 | (call-process | |
4501 | shell-file-name nil t nil | |
4502 | "-c" | |
4503 | (concat (if (memq system-type '(ms-dos windows-nt)) | |
4504 | "" | |
4505 | "\\") ; Disregard Unix shell aliases! | |
4506 | insert-directory-program | |
4507 | " -d " | |
4508 | (if (stringp switches) | |
4509 | switches | |
4510 | (mapconcat 'identity switches " ")) | |
4511 | " -- " | |
4512 | ;; Quote some characters that have | |
4513 | ;; special meanings in shells; but | |
4514 | ;; don't quote the wildcards--we want | |
4515 | ;; them to be special. We also | |
4516 | ;; currently don't quote the quoting | |
4517 | ;; characters in case people want to | |
4518 | ;; use them explicitly to quote | |
4519 | ;; wildcard characters. | |
4520 | (shell-quote-wildcard-pattern pattern)))) | |
4521 | ;; SunOS 4.1.3, SVr4 and others need the "." to list the | |
4522 | ;; directory if FILE is a symbolic link. | |
4523 | (apply 'call-process | |
4524 | insert-directory-program nil t nil | |
4525 | (append | |
4526 | (if (listp switches) switches | |
4527 | (unless (equal switches "") | |
4528 | ;; Split the switches at any spaces so we can | |
4529 | ;; pass separate options as separate args. | |
4530 | (split-string switches))) | |
4531 | ;; Avoid lossage if FILE starts with `-'. | |
4532 | '("--") | |
4533 | (progn | |
4534 | (if (string-match "\\`~" file) | |
4535 | (setq file (expand-file-name file))) | |
4536 | (list | |
4537 | (if full-directory-p | |
4538 | (concat (file-name-as-directory file) ".") | |
4539 | file)))))))) | |
4540 | ||
a1b0c2a7 RS |
4541 | ;; If we got "//DIRED//" in the output, it means we got a real |
4542 | ;; directory listing, even if `ls' returned nonzero. | |
4543 | ;; So ignore any errors. | |
4544 | (when (if (stringp switches) | |
4545 | (string-match "--dired\\>" switches) | |
4546 | (member "--dired" switches)) | |
4547 | (save-excursion | |
4548 | (forward-line -2) | |
4549 | (when (looking-at "//SUBDIRED//") | |
4550 | (forward-line -1)) | |
4551 | (if (looking-at "//DIRED//") | |
4552 | (setq result 0)))) | |
4553 | ||
4554 | (when (and (not (eq 0 result)) | |
4555 | (eq insert-directory-ls-version 'unknown)) | |
4556 | ;; The first time ls returns an error, | |
4557 | ;; find the version numbers of ls, | |
4558 | ;; and set insert-directory-ls-version | |
4559 | ;; to > if it is more than 5.2.1, < if it is less, nil if it | |
4560 | ;; is equal or if the info cannot be obtained. | |
4561 | ;; (That can mean it isn't GNU ls.) | |
4562 | (let ((version-out | |
4563 | (with-temp-buffer | |
4564 | (call-process "ls" nil t nil "--version") | |
4565 | (buffer-string)))) | |
4566 | (if (string-match "ls (.*utils) \\([0-9.]*\\)$" version-out) | |
4567 | (let* ((version (match-string 1 version-out)) | |
4568 | (split (split-string version "[.]")) | |
027a4b6b | 4569 | (numbers (mapcar 'string-to-number split)) |
a1b0c2a7 RS |
4570 | (min '(5 2 1)) |
4571 | comparison) | |
4572 | (while (and (not comparison) (or numbers min)) | |
4573 | (cond ((null min) | |
4574 | (setq comparison '>)) | |
4575 | ((null numbers) | |
4576 | (setq comparison '<)) | |
4577 | ((> (car numbers) (car min)) | |
4578 | (setq comparison '>)) | |
4579 | ((< (car numbers) (car min)) | |
4580 | (setq comparison '<)) | |
4581 | (t | |
4582 | (setq numbers (cdr numbers) | |
4583 | min (cdr min))))) | |
4584 | (setq insert-directory-ls-version (or comparison '=))) | |
4585 | (setq insert-directory-ls-version nil)))) | |
4586 | ||
4587 | ;; For GNU ls versions 5.2.2 and up, ignore minor errors. | |
4588 | (when (and (eq 1 result) (eq insert-directory-ls-version '>)) | |
4589 | (setq result 0)) | |
4590 | ||
ebad92dc | 4591 | ;; If `insert-directory-program' failed, signal an error. |
15502042 | 4592 | (unless (eq 0 result) |
f2440e42 RS |
4593 | ;; Delete the error message it may have output. |
4594 | (delete-region beg (point)) | |
15502042 EZ |
4595 | ;; On non-Posix systems, we cannot open a directory, so |
4596 | ;; don't even try, because that will always result in | |
4597 | ;; the ubiquitous "Access denied". Instead, show the | |
4598 | ;; command line so the user can try to guess what went wrong. | |
4599 | (if (and (file-directory-p file) | |
4600 | (memq system-type '(ms-dos windows-nt))) | |
4601 | (error | |
4602 | "Reading directory: \"%s %s -- %s\" exited with status %s" | |
4603 | insert-directory-program | |
4604 | (if (listp switches) (concat switches) switches) | |
4605 | file result) | |
4606 | ;; Unix. Access the file to get a suitable error. | |
4607 | (access-file file "Reading directory") | |
4608 | (error "Listing directory failed but `access-file' worked"))) | |
ebad92dc | 4609 | |
8f8607be LT |
4610 | (when (if (stringp switches) |
4611 | (string-match "--dired\\>" switches) | |
4612 | (member "--dired" switches)) | |
9bb99df6 LT |
4613 | ;; The following overshoots by one line for an empty |
4614 | ;; directory listed with "--dired", but without "-a" | |
4615 | ;; switch, where the ls output contains a | |
4616 | ;; "//DIRED-OPTIONS//" line, but no "//DIRED//" line. | |
4617 | ;; We take care of that case later. | |
ff7affeb | 4618 | (forward-line -2) |
9423860f AS |
4619 | (when (looking-at "//SUBDIRED//") |
4620 | (delete-region (point) (progn (forward-line 1) (point))) | |
4621 | (forward-line -1)) | |
9bb99df6 LT |
4622 | (if (looking-at "//DIRED//") |
4623 | (let ((end (line-end-position)) | |
4624 | (linebeg (point)) | |
4625 | error-lines) | |
4626 | ;; Find all the lines that are error messages, | |
4627 | ;; and record the bounds of each one. | |
4628 | (goto-char beg) | |
4629 | (while (< (point) linebeg) | |
4630 | (or (eql (following-char) ?\s) | |
4631 | (push (list (point) (line-end-position)) error-lines)) | |
4632 | (forward-line 1)) | |
4633 | (setq error-lines (nreverse error-lines)) | |
4634 | ;; Now read the numeric positions of file names. | |
4635 | (goto-char linebeg) | |
4636 | (forward-word 1) | |
4637 | (forward-char 3) | |
4638 | (while (< (point) end) | |
4639 | (let ((start (insert-directory-adj-pos | |
4640 | (+ beg (read (current-buffer))) | |
4641 | error-lines)) | |
4642 | (end (insert-directory-adj-pos | |
a1b0c2a7 | 4643 | (+ beg (read (current-buffer))) |
9bb99df6 LT |
4644 | error-lines))) |
4645 | (if (memq (char-after end) '(?\n ?\ )) | |
4646 | ;; End is followed by \n or by " -> ". | |
4647 | (put-text-property start end 'dired-filename t) | |
4648 | ;; It seems that we can't trust ls's output as to | |
4649 | ;; byte positions of filenames. | |
4650 | (put-text-property beg (point) 'dired-filename nil) | |
4651 | (end-of-line)))) | |
4652 | (goto-char end) | |
4653 | (beginning-of-line) | |
4654 | (delete-region (point) (progn (forward-line 1) (point)))) | |
4655 | ;; Take care of the case where the ls output contains a | |
4656 | ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line | |
4657 | ;; and we went one line too far back (see above). | |
4658 | (forward-line 1)) | |
4659 | (if (looking-at "//DIRED-OPTIONS//") | |
4660 | (delete-region (point) (progn (forward-line 1) (point))))) | |
ff7affeb | 4661 | |
99f01c91 | 4662 | ;; Now decode what read if necessary. |
b6647390 KH |
4663 | (let ((coding (or coding-system-for-read |
4664 | file-name-coding-system | |
4665 | default-file-name-coding-system | |
4666 | 'undecided)) | |
0bded065 | 4667 | coding-no-eol |
99f01c91 | 4668 | val pos) |
b6647390 KH |
4669 | (when (and enable-multibyte-characters |
4670 | (not (memq (coding-system-base coding) | |
4671 | '(raw-text no-conversion)))) | |
4672 | ;; If no coding system is specified or detection is | |
4673 | ;; requested, detect the coding. | |
4674 | (if (eq (coding-system-base coding) 'undecided) | |
4675 | (setq coding (detect-coding-region beg (point) t))) | |
4676 | (if (not (eq (coding-system-base coding) 'undecided)) | |
4677 | (save-restriction | |
0bded065 AS |
4678 | (setq coding-no-eol |
4679 | (coding-system-change-eol-conversion coding 'unix)) | |
b6647390 KH |
4680 | (narrow-to-region beg (point)) |
4681 | (goto-char (point-min)) | |
4682 | (while (not (eobp)) | |
4683 | (setq pos (point) | |
4684 | val (get-text-property (point) 'dired-filename)) | |
4685 | (goto-char (next-single-property-change | |
4686 | (point) 'dired-filename nil (point-max))) | |
0bded065 AS |
4687 | ;; Force no eol conversion on a file name, so |
4688 | ;; that CR is preserved. | |
4689 | (decode-coding-region pos (point) | |
4690 | (if val coding-no-eol coding)) | |
b6647390 KH |
4691 | (if val |
4692 | (put-text-property pos (point) | |
4693 | 'dired-filename t))))))) | |
99f01c91 | 4694 | |
75bb5ca4 AS |
4695 | (if full-directory-p |
4696 | ;; Try to insert the amount of free space. | |
4697 | (save-excursion | |
4698 | (goto-char beg) | |
4699 | ;; First find the line to put it on. | |
4700 | (when (re-search-forward "^ *\\(total\\)" nil t) | |
4701 | (let ((available (get-free-disk-space "."))) | |
4702 | (when available | |
4703 | ;; Replace "total" with "used", to avoid confusion. | |
4704 | (replace-match "total used in directory" nil nil nil 1) | |
4705 | (end-of-line) | |
4706 | (insert " available " available))))))))))) | |
34342a07 | 4707 | |
a1b0c2a7 | 4708 | (defun insert-directory-adj-pos (pos error-lines) |
fead94d6 | 4709 | "Convert `ls --dired' file name position value POS to a buffer position. |
a1b0c2a7 RS |
4710 | File name position values returned in ls --dired output |
4711 | count only stdout; they don't count the error messages sent to stderr. | |
4712 | So this function converts to them to real buffer positions. | |
4713 | ERROR-LINES is a list of buffer positions of error message lines, | |
4714 | of the form (START END)." | |
4715 | (while (and error-lines (< (caar error-lines) pos)) | |
4716 | (setq pos (+ pos (- (nth 1 (car error-lines)) (nth 0 (car error-lines))))) | |
4717 | (pop error-lines)) | |
4718 | pos) | |
4719 | ||
bc22fd18 EZ |
4720 | (defun insert-directory-safely (file switches |
4721 | &optional wildcard full-directory-p) | |
4722 | "Insert directory listing for FILE, formatted according to SWITCHES. | |
4723 | ||
4724 | Like `insert-directory', but if FILE does not exist, it inserts a | |
4725 | message to that effect instead of signaling an error." | |
4726 | (if (file-exists-p file) | |
4727 | (insert-directory file switches wildcard full-directory-p) | |
4728 | ;; Simulate the message printed by `ls'. | |
4729 | (insert (format "%s: No such file or directory\n" file)))) | |
4730 | ||
88902b35 | 4731 | (defvar kill-emacs-query-functions nil |
65d5c6de | 4732 | "Functions to call with no arguments to query about killing Emacs. |
78c793d1 RS |
4733 | If any of these functions returns nil, killing Emacs is cancelled. |
4734 | `save-buffers-kill-emacs' (\\[save-buffers-kill-emacs]) calls these functions, | |
4735 | but `kill-emacs', the low level primitive, does not. | |
4736 | See also `kill-emacs-hook'.") | |
88902b35 | 4737 | |
11f15305 | 4738 | (defcustom confirm-kill-emacs nil |
9c2ba08f EZ |
4739 | "How to ask for confirmation when leaving Emacs. |
4740 | If nil, the default, don't ask at all. If the value is non-nil, it should | |
4741 | be a predicate function such as `yes-or-no-p'." | |
11f15305 GM |
4742 | :type '(choice (const :tag "Ask with yes-or-no-p" yes-or-no-p) |
4743 | (const :tag "Ask with y-or-n-p" y-or-n-p) | |
4744 | (const :tag "Don't confirm" nil)) | |
bdd9ab6e | 4745 | :group 'convenience |
11f15305 GM |
4746 | :version "21.1") |
4747 | ||
b4da00e9 RM |
4748 | (defun save-buffers-kill-emacs (&optional arg) |
4749 | "Offer to save each buffer, then kill this Emacs process. | |
4750 | With prefix arg, silently save all file-visiting buffers, then kill." | |
4751 | (interactive "P") | |
4752 | (save-some-buffers arg t) | |
4753 | (and (or (not (memq t (mapcar (function | |
4754 | (lambda (buf) (and (buffer-file-name buf) | |
4755 | (buffer-modified-p buf)))) | |
4756 | (buffer-list)))) | |
4757 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) | |
4758 | (or (not (fboundp 'process-list)) | |
4759 | ;; process-list is not defined on VMS. | |
4760 | (let ((processes (process-list)) | |
4761 | active) | |
4762 | (while processes | |
48a4a1fb KS |
4763 | (and (memq (process-status (car processes)) '(run stop open listen)) |
4764 | (process-query-on-exit-flag (car processes)) | |
b4da00e9 RM |
4765 | (setq active t)) |
4766 | (setq processes (cdr processes))) | |
4767 | (or (not active) | |
48a4a1fb | 4768 | (list-processes t) |
b4da00e9 | 4769 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) |
88902b35 | 4770 | ;; Query the user for other things, perhaps. |
fb15c113 | 4771 | (run-hook-with-args-until-failure 'kill-emacs-query-functions) |
11f15305 GM |
4772 | (or (null confirm-kill-emacs) |
4773 | (funcall confirm-kill-emacs "Really exit Emacs? ")) | |
b4da00e9 RM |
4774 | (kill-emacs))) |
4775 | \f | |
ffc0e1ca | 4776 | ;; We use /: as a prefix to "quote" a file name |
47afc068 RS |
4777 | ;; so that magic file name handlers will not apply to it. |
4778 | ||
4779 | (setq file-name-handler-alist | |
4780 | (cons '("\\`/:" . file-name-non-special) | |
4781 | file-name-handler-alist)) | |
4782 | ||
4783 | ;; We depend on being the last handler on the list, | |
4784 | ;; so that anything else which does need handling | |
4785 | ;; has been handled already. | |
4786 | ;; So it is safe for us to inhibit *all* magic file name handlers. | |
4787 | ||
4788 | (defun file-name-non-special (operation &rest arguments) | |
4789 | (let ((file-name-handler-alist nil) | |
5cb1f728 KH |
4790 | (default-directory |
4791 | (if (eq operation 'insert-directory) | |
4792 | (directory-file-name | |
ffc0e1ca | 4793 | (expand-file-name |
5cb1f728 KH |
4794 | (unhandled-file-name-directory default-directory))) |
4795 | default-directory)) | |
47afc068 RS |
4796 | ;; Get a list of the indices of the args which are file names. |
4797 | (file-arg-indices | |
4798 | (cdr (or (assq operation | |
ae3b2983 | 4799 | ;; The first six are special because they |
47afc068 RS |
4800 | ;; return a file name. We want to include the /: |
4801 | ;; in the return value. | |
4802 | ;; So just avoid stripping it in the first place. | |
4803 | '((expand-file-name . nil) | |
4804 | (file-name-directory . nil) | |
4805 | (file-name-as-directory . nil) | |
4806 | (directory-file-name . nil) | |
c736f678 | 4807 | (file-name-sans-versions . nil) |
ae3b2983 | 4808 | (find-backup-file-name . nil) |
c736f678 | 4809 | ;; `identity' means just return the first arg |
6750c852 RS |
4810 | ;; not stripped of its quoting. |
4811 | (substitute-in-file-name identity) | |
ae3b2983 MA |
4812 | ;; `add' means add "/:" to the result. |
4813 | (file-truename add 0) | |
4814 | ;; `quote' means add "/:" to buffer-file-name. | |
4815 | (insert-file-contents quote 0) | |
4816 | ;; `unquote-then-quote' means set buffer-file-name | |
4817 | ;; temporarily to unquoted filename. | |
4818 | (verify-visited-file-modtime unquote-then-quote) | |
4819 | ;; List the arguments which are filenames. | |
c37adaa5 SM |
4820 | (file-name-completion 1) |
4821 | (file-name-all-completions 1) | |
ae3b2983 | 4822 | (write-region 2 5) |
47afc068 RS |
4823 | (rename-file 0 1) |
4824 | (copy-file 0 1) | |
4825 | (make-symbolic-link 0 1) | |
4826 | (add-name-to-file 0 1))) | |
4827 | ;; For all other operations, treat the first argument only | |
4828 | ;; as the file name. | |
4829 | '(nil 0)))) | |
6750c852 | 4830 | method |
47afc068 RS |
4831 | ;; Copy ARGUMENTS so we can replace elements in it. |
4832 | (arguments (copy-sequence arguments))) | |
6750c852 RS |
4833 | (if (symbolp (car file-arg-indices)) |
4834 | (setq method (pop file-arg-indices))) | |
4835 | ;; Strip off the /: from the file names that have it. | |
47afc068 | 4836 | (save-match-data |
18b9dced | 4837 | (while (consp file-arg-indices) |
fe4d9852 KH |
4838 | (let ((pair (nthcdr (car file-arg-indices) arguments))) |
4839 | (and (car pair) | |
4840 | (string-match "\\`/:" (car pair)) | |
4841 | (setcar pair | |
4842 | (if (= (length (car pair)) 2) | |
4843 | "/" | |
4844 | (substring (car pair) 2))))) | |
47afc068 | 4845 | (setq file-arg-indices (cdr file-arg-indices)))) |
6750c852 RS |
4846 | (cond ((eq method 'identity) |
4847 | (car arguments)) | |
ae3b2983 | 4848 | ((eq method 'add) |
6750c852 | 4849 | (concat "/:" (apply operation arguments))) |
ae3b2983 MA |
4850 | ((eq method 'quote) |
4851 | (prog1 (apply operation arguments) | |
4852 | (setq buffer-file-name (concat "/:" buffer-file-name)))) | |
4853 | ((eq method 'unquote-then-quote) | |
4854 | (let (res) | |
4855 | (setq buffer-file-name (substring buffer-file-name 2)) | |
4856 | (setq res (apply operation arguments)) | |
4857 | (setq buffer-file-name (concat "/:" buffer-file-name)) | |
4858 | res)) | |
6750c852 RS |
4859 | (t |
4860 | (apply operation arguments))))) | |
47afc068 | 4861 | \f |
b4da00e9 | 4862 | (define-key ctl-x-map "\C-f" 'find-file) |
b4da00e9 RM |
4863 | (define-key ctl-x-map "\C-r" 'find-file-read-only) |
4864 | (define-key ctl-x-map "\C-v" 'find-alternate-file) | |
4865 | (define-key ctl-x-map "\C-s" 'save-buffer) | |
4866 | (define-key ctl-x-map "s" 'save-some-buffers) | |
4867 | (define-key ctl-x-map "\C-w" 'write-file) | |
4868 | (define-key ctl-x-map "i" 'insert-file) | |
4869 | (define-key esc-map "~" 'not-modified) | |
4870 | (define-key ctl-x-map "\C-d" 'list-directory) | |
4871 | (define-key ctl-x-map "\C-c" 'save-buffers-kill-emacs) | |
d758359d | 4872 | (define-key ctl-x-map "\C-q" 'toggle-read-only) |
b4da00e9 RM |
4873 | |
4874 | (define-key ctl-x-4-map "f" 'find-file-other-window) | |
4875 | (define-key ctl-x-4-map "r" 'find-file-read-only-other-window) | |
4876 | (define-key ctl-x-4-map "\C-f" 'find-file-other-window) | |
4877 | (define-key ctl-x-4-map "b" 'switch-to-buffer-other-window) | |
924f0a24 | 4878 | (define-key ctl-x-4-map "\C-o" 'display-buffer) |
5bbbceb1 | 4879 | |
f98955ea JB |
4880 | (define-key ctl-x-5-map "b" 'switch-to-buffer-other-frame) |
4881 | (define-key ctl-x-5-map "f" 'find-file-other-frame) | |
4882 | (define-key ctl-x-5-map "\C-f" 'find-file-other-frame) | |
4883 | (define-key ctl-x-5-map "r" 'find-file-read-only-other-frame) | |
c0274f38 | 4884 | |
c3f6aa20 | 4885 | ;; arch-tag: bc68d3ea-19ca-468b-aac6-3a4a7766101f |
c0274f38 | 4886 | ;;; files.el ends here |