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c0274f38 ER |
1 | ;;; files.el --- file input and output commands for Emacs |
2 | ||
a641f9a1 | 3 | ;; Copyright (C) 1985, 86, 87, 92, 93, 94, 1995 Free Software Foundation, Inc. |
b4da00e9 | 4 | |
3a801d0c ER |
5 | ;; Maintainer: FSF |
6 | ||
b4da00e9 RM |
7 | ;; This file is part of GNU Emacs. |
8 | ||
9 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
10 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 11 | ;; the Free Software Foundation; either version 2, or (at your option) |
b4da00e9 RM |
12 | ;; any later version. |
13 | ||
14 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
15 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | ;; GNU General Public License for more details. | |
18 | ||
19 | ;; You should have received a copy of the GNU General Public License | |
20 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
21 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | ||
e41b2db1 ER |
23 | ;;; Commentary: |
24 | ||
25 | ;; Defines most of Emacs's file- and directory-handling functions, | |
26 | ;; including basic file visiting, backup generation, link handling, | |
27 | ;; ITS-id version control, load- and write-hook handling, and the like. | |
28 | ||
e5167999 ER |
29 | ;;; Code: |
30 | ||
b4da00e9 | 31 | (defconst delete-auto-save-files t |
d1739e52 | 32 | "*Non-nil means delete auto-save file when a buffer is saved or killed.") |
b4da00e9 RM |
33 | |
34 | (defconst directory-abbrev-alist | |
35 | nil | |
36 | "*Alist of abbreviations for file directories. | |
37 | A list of elements of the form (FROM . TO), each meaning to replace | |
38 | FROM with TO when it appears in a directory name. This replacement is | |
39 | done when setting up the default directory of a newly visited file. | |
40 | *Every* FROM string should start with `^'. | |
41 | ||
65151a1b RS |
42 | Do not use `~' in the TO strings. |
43 | They should be ordinary absolute directory names. | |
44 | ||
b4da00e9 RM |
45 | Use this feature when you have directories which you normally refer to |
46 | via absolute symbolic links. Make TO the name of the link, and FROM | |
47 | the name it is linked to.") | |
48 | ||
49 | ;;; Turn off backup files on VMS since it has version numbers. | |
50 | (defconst make-backup-files (not (eq system-type 'vax-vms)) | |
4ea836c1 | 51 | "*Non-nil means make a backup of a file the first time it is saved. |
b4da00e9 RM |
52 | This can be done by renaming the file or by copying. |
53 | ||
54 | Renaming means that Emacs renames the existing file so that it is a | |
55 | backup file, then writes the buffer into a new file. Any other names | |
56 | that the old file had will now refer to the backup file. The new file | |
57 | is owned by you and its group is defaulted. | |
58 | ||
59 | Copying means that Emacs copies the existing file into the backup | |
60 | file, then writes the buffer on top of the existing file. Any other | |
61 | names that the old file had will now refer to the new (edited) file. | |
62 | The file's owner and group are unchanged. | |
63 | ||
64 | The choice of renaming or copying is controlled by the variables | |
65 | `backup-by-copying', `backup-by-copying-when-linked' and | |
f862241d | 66 | `backup-by-copying-when-mismatch'. See also `backup-inhibited'.") |
b4da00e9 RM |
67 | |
68 | ;; Do this so that local variables based on the file name | |
69 | ;; are not overridden by the major mode. | |
70 | (defvar backup-inhibited nil | |
f862241d RS |
71 | "Non-nil means don't make a backup, regardless of the other parameters. |
72 | This variable is intended for use by making it local to a buffer. | |
73 | But it is local only if you make it local.") | |
b4da00e9 RM |
74 | (put 'backup-inhibited 'permanent-local t) |
75 | ||
76 | (defconst backup-by-copying nil | |
77 | "*Non-nil means always use copying to create backup files. | |
78 | See documentation of variable `make-backup-files'.") | |
79 | ||
80 | (defconst backup-by-copying-when-linked nil | |
81 | "*Non-nil means use copying to create backups for files with multiple names. | |
82 | This causes the alternate names to refer to the latest version as edited. | |
83 | This variable is relevant only if `backup-by-copying' is nil.") | |
84 | ||
85 | (defconst backup-by-copying-when-mismatch nil | |
86 | "*Non-nil means create backups by copying if this preserves owner or group. | |
87 | Renaming may still be used (subject to control of other variables) | |
88 | when it would not result in changing the owner or group of the file; | |
89 | that is, for files which are owned by you and whose group matches | |
90 | the default for a new file created there by you. | |
91 | This variable is relevant only if `backup-by-copying' is nil.") | |
92 | ||
93 | (defvar backup-enable-predicate | |
94 | '(lambda (name) | |
95 | (or (< (length name) 5) | |
96 | (not (string-equal "/tmp/" (substring name 0 5))))) | |
97 | "Predicate that looks at a file name and decides whether to make backups. | |
98 | Called with an absolute file name as argument, it returns t to enable backup.") | |
99 | ||
100 | (defconst buffer-offer-save nil | |
101 | "*Non-nil in a buffer means offer to save the buffer on exit | |
102 | even if the buffer is not visiting a file. | |
103 | Automatically local in all buffers.") | |
104 | (make-variable-buffer-local 'buffer-offer-save) | |
105 | ||
f3e23606 RS |
106 | (defconst find-file-existing-other-name nil |
107 | "*Non-nil means find a file under alternative names, in existing buffers. | |
108 | This means if any existing buffer is visiting the file you want | |
109 | under another name, you get the existing buffer instead of a new buffer.") | |
110 | ||
111 | (defconst find-file-visit-truename nil | |
112 | "*Non-nil means visit a file under its truename. | |
113 | The truename of a file is found by chasing all links | |
114 | both at the file level and at the levels of the containing directories.") | |
115 | ||
f3e23606 RS |
116 | (defvar buffer-file-number nil |
117 | "The device number and file number of the file visited in the current buffer. | |
118 | The value is a list of the form (FILENUM DEVNUM). | |
119 | This pair of numbers uniquely identifies the file. | |
120 | If the buffer is visiting a new file, the value is nil.") | |
121 | (make-variable-buffer-local 'buffer-file-number) | |
122 | (put 'buffer-file-number 'permanent-local t) | |
123 | ||
b4da00e9 RM |
124 | (defconst file-precious-flag nil |
125 | "*Non-nil means protect against I/O errors while saving files. | |
560f4415 | 126 | Some modes set this non-nil in particular buffers. |
4b7271c1 KH |
127 | |
128 | This feature works by writing the new contents into a temporary file | |
129 | and then renaming the temporary file to replace the original. | |
130 | In this way, any I/O error in writing leaves the original untouched, | |
131 | and there is never any instant where the file is nonexistent. | |
132 | ||
133 | Note that this feature forces backups to be made by copying. | |
560f4415 KH |
134 | Yet, at the same time, saving a precious file |
135 | breaks any hard links between it and other files.") | |
b4da00e9 RM |
136 | |
137 | (defvar version-control nil | |
138 | "*Control use of version numbers for backup files. | |
139 | t means make numeric backup versions unconditionally. | |
140 | nil means make them for files that have some already. | |
399f8dd6 | 141 | `never' means do not make them.") |
b4da00e9 RM |
142 | |
143 | (defvar dired-kept-versions 2 | |
144 | "*When cleaning directory, number of versions to keep.") | |
145 | ||
de7d5e1b RS |
146 | (defvar delete-old-versions nil |
147 | "*If t, delete excess backup versions silently. | |
148 | If nil, ask confirmation. Any other value prevents any trimming.") | |
b4da00e9 RM |
149 | |
150 | (defvar kept-old-versions 2 | |
151 | "*Number of oldest versions to keep when a new numbered backup is made.") | |
152 | ||
153 | (defvar kept-new-versions 2 | |
154 | "*Number of newest versions to keep when a new numbered backup is made. | |
155 | Includes the new backup. Must be > 0") | |
156 | ||
157 | (defconst require-final-newline nil | |
158 | "*Value of t says silently ensure a file ends in a newline when it is saved. | |
159 | Non-nil but not t says ask user whether to add a newline when there isn't one. | |
160 | nil means don't add newlines.") | |
161 | ||
162 | (defconst auto-save-default t | |
163 | "*Non-nil says by default do auto-saving of every file-visiting buffer.") | |
164 | ||
165 | (defconst auto-save-visited-file-name nil | |
166 | "*Non-nil says auto-save a buffer in the file it is visiting, when practical. | |
167 | Normally auto-save files are written under other names.") | |
168 | ||
169 | (defconst save-abbrevs nil | |
170 | "*Non-nil means save word abbrevs too when files are saved. | |
171 | Loading an abbrev file sets this to t.") | |
172 | ||
173 | (defconst find-file-run-dired t | |
320b4233 | 174 | "*Non-nil says run dired if `find-file' is given the name of a directory.") |
b4da00e9 | 175 | |
92966e6f RS |
176 | ;;;It is not useful to make this a local variable. |
177 | ;;;(put 'find-file-not-found-hooks 'permanent-local t) | |
b4da00e9 RM |
178 | (defvar find-file-not-found-hooks nil |
179 | "List of functions to be called for `find-file' on nonexistent file. | |
180 | These functions are called as soon as the error is detected. | |
181 | `buffer-file-name' is already set up. | |
182 | The functions are called in the order given until one of them returns non-nil.") | |
183 | ||
92966e6f RS |
184 | ;;;It is not useful to make this a local variable. |
185 | ;;;(put 'find-file-hooks 'permanent-local t) | |
b4da00e9 RM |
186 | (defvar find-file-hooks nil |
187 | "List of functions to be called after a buffer is loaded from a file. | |
188 | The buffer's local variables (if any) will have been processed before the | |
189 | functions are called.") | |
190 | ||
b4da00e9 RM |
191 | (defvar write-file-hooks nil |
192 | "List of functions to be called before writing out a buffer to a file. | |
193 | If one of them returns non-nil, the file is considered already written | |
8c0e7b73 JB |
194 | and the rest are not called. |
195 | These hooks are considered to pertain to the visited file. | |
196 | So this list is cleared if you change the visited file name. | |
c9dca4e0 RS |
197 | See also `write-contents-hooks'. |
198 | Don't make this variable buffer-local; instead, use `local-write-file-hooks'.") | |
b19f1da4 BF |
199 | ;;; However, in case someone does make it local... |
200 | (put 'write-file-hooks 'permanent-local t) | |
c9dca4e0 | 201 | |
c9dca4e0 RS |
202 | (defvar local-write-file-hooks nil |
203 | "Just like `write-file-hooks', except intended for per-buffer use. | |
204 | The functions in this list are called before the ones in | |
205 | `write-file-hooks'.") | |
b19f1da4 BF |
206 | (make-variable-buffer-local 'local-write-file-hooks) |
207 | (put 'local-write-file-hooks 'permanent-local t) | |
8c0e7b73 JB |
208 | |
209 | (defvar write-contents-hooks nil | |
210 | "List of functions to be called before writing out a buffer to a file. | |
211 | If one of them returns non-nil, the file is considered already written | |
212 | and the rest are not called. | |
213 | These hooks are considered to pertain to the buffer's contents, | |
214 | not to the particular visited file; thus, `set-visited-file-name' does | |
215 | not clear this variable, but changing the major mode does clear it. | |
216 | See also `write-file-hooks'.") | |
b4da00e9 RM |
217 | |
218 | (defconst enable-local-variables t | |
219 | "*Control use of local-variables lists in files you visit. | |
220 | The value can be t, nil or something else. | |
221 | A value of t means local-variables lists are obeyed; | |
222 | nil means they are ignored; anything else means query. | |
223 | ||
224 | The command \\[normal-mode] always obeys local-variables lists | |
225 | and ignores this variable.") | |
226 | ||
2bba782c | 227 | (defconst enable-local-eval 'maybe |
d207b766 RS |
228 | "*Control processing of the \"variable\" `eval' in a file's local variables. |
229 | The value can be t, nil or something else. | |
230 | A value of t means obey `eval' variables; | |
231 | nil means ignore them; anything else means query. | |
232 | ||
233 | The command \\[normal-mode] always obeys local-variables lists | |
234 | and ignores this variable.") | |
b4da00e9 RM |
235 | |
236 | ;; Avoid losing in versions where CLASH_DETECTION is disabled. | |
237 | (or (fboundp 'lock-buffer) | |
231c4e10 | 238 | (defalias 'lock-buffer 'ignore)) |
b4da00e9 | 239 | (or (fboundp 'unlock-buffer) |
231c4e10 | 240 | (defalias 'unlock-buffer 'ignore)) |
93fe0a35 RS |
241 | |
242 | ;; This hook function provides support for ange-ftp host name | |
243 | ;; completion. It runs the usual ange-ftp hook, but only for | |
244 | ;; completion operations. Having this here avoids the need | |
245 | ;; to load ange-ftp when it's not really in use. | |
246 | (defun ange-ftp-completion-hook-function (op &rest args) | |
247 | (if (memq op '(file-name-completion file-name-all-completions)) | |
248 | (apply 'ange-ftp-hook-function op args) | |
57e81f57 RS |
249 | (let ((inhibit-file-name-handlers |
250 | (cons 'ange-ftp-completion-hook-function | |
251 | (and (eq inhibit-file-name-operation op) | |
252 | inhibit-file-name-handlers))) | |
253 | (inhibit-file-name-operation op)) | |
93fe0a35 | 254 | (apply op args)))) |
b4da00e9 RM |
255 | \f |
256 | (defun pwd () | |
257 | "Show the current default directory." | |
258 | (interactive nil) | |
259 | (message "Directory %s" default-directory)) | |
260 | ||
231c4e10 ER |
261 | (defvar cd-path nil |
262 | "Value of the CDPATH environment variable, as a list. | |
263 | Not actually set up until the first time you you use it.") | |
264 | ||
306faa42 RS |
265 | (defvar path-separator ":" |
266 | "Character used to separate concatenated paths.") | |
267 | ||
231c4e10 ER |
268 | (defun parse-colon-path (cd-path) |
269 | "Explode a colon-separated list of paths into a string list." | |
270 | (and cd-path | |
271 | (let (cd-prefix cd-list (cd-start 0) cd-colon) | |
306faa42 RS |
272 | (setq cd-path (concat cd-path path-separator)) |
273 | (while (setq cd-colon (string-match path-separator cd-path cd-start)) | |
231c4e10 | 274 | (setq cd-list |
9daefb36 | 275 | (nconc cd-list |
c52e4104 RS |
276 | (list (if (= cd-start cd-colon) |
277 | nil | |
278 | (substitute-in-file-name | |
e33e80e4 RS |
279 | (file-name-as-directory |
280 | (substring cd-path cd-start cd-colon))))))) | |
231c4e10 ER |
281 | (setq cd-start (+ cd-colon 1))) |
282 | cd-list))) | |
283 | ||
284 | (defun cd-absolute (dir) | |
30c5ce9c | 285 | "Change current directory to given absolute file name DIR." |
f4a0f59b RS |
286 | ;; Put the name into directory syntax now, |
287 | ;; because otherwise expand-file-name may give some bad results. | |
b4da00e9 RM |
288 | (if (not (eq system-type 'vax-vms)) |
289 | (setq dir (file-name-as-directory dir))) | |
f4a0f59b | 290 | (setq dir (abbreviate-file-name (expand-file-name dir))) |
b4da00e9 RM |
291 | (if (not (file-directory-p dir)) |
292 | (error "%s is not a directory" dir) | |
293 | (if (file-executable-p dir) | |
294 | (setq default-directory dir) | |
9daefb36 | 295 | (error "Cannot cd to %s: Permission denied" dir)))) |
b4da00e9 | 296 | |
231c4e10 ER |
297 | (defun cd (dir) |
298 | "Make DIR become the current buffer's default directory. | |
30c5ce9c RS |
299 | If your environment includes a `CDPATH' variable, try each one of that |
300 | colon-separated list of directories when resolving a relative directory name." | |
dac4ea74 RS |
301 | (interactive |
302 | (list (read-file-name "Change default directory: " | |
2121cd9c RM |
303 | default-directory default-directory |
304 | (and (member cd-path '(nil ("./"))) | |
305 | (null (getenv "CDPATH")))))) | |
30c5ce9c RS |
306 | (if (file-name-absolute-p dir) |
307 | (cd-absolute (expand-file-name dir)) | |
308 | (if (null cd-path) | |
309 | (let ((trypath (parse-colon-path (getenv "CDPATH")))) | |
310 | (setq cd-path (or trypath (list "./"))))) | |
311 | (if (not (catch 'found | |
312 | (mapcar | |
313 | (function (lambda (x) | |
314 | (let ((f (expand-file-name (concat x dir)))) | |
315 | (if (file-directory-p f) | |
316 | (progn | |
317 | (cd-absolute f) | |
318 | (throw 'found t)))))) | |
319 | cd-path) | |
320 | nil)) | |
321 | (error "No such directory found via CDPATH environment variable")))) | |
231c4e10 | 322 | |
b4da00e9 RM |
323 | (defun load-file (file) |
324 | "Load the Lisp file named FILE." | |
325 | (interactive "fLoad file: ") | |
326 | (load (expand-file-name file) nil nil t)) | |
327 | ||
328 | (defun load-library (library) | |
329 | "Load the library named LIBRARY. | |
330 | This is an interface to the function `load'." | |
331 | (interactive "sLoad library: ") | |
332 | (load library)) | |
5d68c2c2 | 333 | |
7c4b8f8c | 334 | (defun file-local-copy (file &optional buffer) |
5d68c2c2 RS |
335 | "Copy the file FILE into a temporary file on this machine. |
336 | Returns the name of the local copy, or nil, if FILE is directly | |
337 | accessible." | |
6eaebaa2 | 338 | (let ((handler (find-file-name-handler file 'file-local-copy))) |
5d68c2c2 RS |
339 | (if handler |
340 | (funcall handler 'file-local-copy file) | |
341 | nil))) | |
f3e23606 | 342 | |
05ef1cda | 343 | (defun file-truename (filename &optional counter prev-dirs) |
f3e23606 RS |
344 | "Return the truename of FILENAME, which should be absolute. |
345 | The truename of a file name is found by chasing symbolic links | |
346 | both at the level of the file and at the level of the directories | |
05ef1cda RS |
347 | containing it, until no links are left at any level. |
348 | ||
349 | The arguments COUNTER and PREV-DIRS are used only in recursive calls. | |
350 | Do not specify them in other calls." | |
351 | ;; COUNTER can be a cons cell whose car is the count of how many more links | |
352 | ;; to chase before getting an error. | |
353 | ;; PREV-DIRS can be a cons cell whose car is an alist | |
354 | ;; of truenames we've just recently computed. | |
cc37a58c | 355 | |
cc37a58c SM |
356 | ;; The last test looks dubious, maybe `+' is meant here? --simon. |
357 | (if (or (string= filename "") (string= filename "~") | |
7a5a26a6 RS |
358 | (and (string= (substring filename 0 1) "~") |
359 | (string-match "~[^/]*" filename))) | |
1cc2fbeb RS |
360 | (progn |
361 | (setq filename (expand-file-name filename)) | |
362 | (if (string= filename "") | |
363 | (setq filename "/")))) | |
05ef1cda | 364 | (or counter (setq counter (list 100))) |
b505828b RS |
365 | (let (done |
366 | ;; For speed, remove the ange-ftp completion handler from the list. | |
367 | ;; We know it's not needed here. | |
368 | ;; For even more speed, do this only on the outermost call. | |
369 | (file-name-handler-alist | |
370 | (if prev-dirs file-name-handler-alist | |
371 | (let ((tem (copy-sequence file-name-handler-alist))) | |
372 | (delq (rassq 'ange-ftp-completion-hook-function tem) tem))))) | |
373 | (or prev-dirs (setq prev-dirs (list nil))) | |
05ef1cda RS |
374 | ;; If this file directly leads to a link, process that iteratively |
375 | ;; so that we don't use lots of stack. | |
376 | (while (not done) | |
377 | (setcar counter (1- (car counter))) | |
378 | (if (< (car counter) 0) | |
379 | (error "Apparent cycle of symbolic links for %s" filename)) | |
380 | (let ((handler (find-file-name-handler filename 'file-truename))) | |
381 | ;; For file name that has a special handler, call handler. | |
382 | ;; This is so that ange-ftp can save time by doing a no-op. | |
383 | (if handler | |
384 | (setq filename (funcall handler 'file-truename filename) | |
385 | done t) | |
fb145562 | 386 | (let ((dir (or (file-name-directory filename) default-directory)) |
05ef1cda RS |
387 | target dirfile) |
388 | ;; Get the truename of the directory. | |
389 | (setq dirfile (directory-file-name dir)) | |
390 | ;; If these are equal, we have the (or a) root directory. | |
391 | (or (string= dir dirfile) | |
392 | ;; If this is the same dir we last got the truename for, | |
393 | ;; save time--don't recalculate. | |
394 | (if (assoc dir (car prev-dirs)) | |
395 | (setq dir (cdr (assoc dir (car prev-dirs)))) | |
396 | (let ((old dir) | |
397 | (new (file-name-as-directory (file-truename dirfile counter prev-dirs)))) | |
398 | (setcar prev-dirs (cons (cons old new) (car prev-dirs))) | |
399 | (setq dir new)))) | |
400 | (if (equal ".." (file-name-nondirectory filename)) | |
401 | (setq filename | |
402 | (directory-file-name (file-name-directory (directory-file-name dir))) | |
403 | done t) | |
404 | (if (equal "." (file-name-nondirectory filename)) | |
405 | (setq filename (directory-file-name dir) | |
406 | done t) | |
407 | ;; Put it back on the file name. | |
408 | (setq filename (concat dir (file-name-nondirectory filename))) | |
409 | ;; Is the file name the name of a link? | |
410 | (setq target (file-symlink-p filename)) | |
411 | (if target | |
412 | ;; Yes => chase that link, then start all over | |
413 | ;; since the link may point to a directory name that uses links. | |
414 | ;; We can't safely use expand-file-name here | |
415 | ;; since target might look like foo/../bar where foo | |
416 | ;; is itself a link. Instead, we handle . and .. above. | |
417 | (setq filename | |
418 | (if (file-name-absolute-p target) | |
419 | target | |
420 | (concat dir target)) | |
421 | done nil) | |
422 | ;; No, we are done! | |
423 | (setq done t)))))))) | |
424 | filename)) | |
5dbfdacd | 425 | |
5dadeb29 RS |
426 | (defun file-chase-links (filename) |
427 | "Chase links in FILENAME until a name that is not a link. | |
428 | Does not examine containing directories for links, | |
429 | unlike `file-truename'." | |
430 | (let (tem (count 100) (newname filename)) | |
431 | (while (setq tem (file-symlink-p newname)) | |
432 | (if (= count 0) | |
433 | (error "Apparent cycle of symbolic links for %s" filename)) | |
f01de0db KH |
434 | ;; In the context of a link, `//' doesn't mean what Emacs thinks. |
435 | (while (string-match "//+" tem) | |
436 | (setq tem (concat (substring tem 0 (1+ (match-beginning 0))) | |
437 | (substring tem (match-end 0))))) | |
cf65b429 RS |
438 | ;; Handle `..' by hand, since it needs to work in the |
439 | ;; target of any directory symlink. | |
440 | ;; This code is not quite complete; it does not handle | |
441 | ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose. | |
f01de0db | 442 | (while (string-match "\\`\\.\\./" tem) |
cf65b429 RS |
443 | (setq tem (substring tem 3)) |
444 | (setq newname (file-name-as-directory | |
445 | ;; Do the .. by hand. | |
446 | (directory-file-name | |
447 | (file-name-directory | |
448 | ;; Chase links in the default dir of the symlink. | |
449 | (file-chase-links | |
450 | (directory-file-name | |
451 | (file-name-directory newname)))))))) | |
5dadeb29 RS |
452 | (setq newname (expand-file-name tem (file-name-directory newname))) |
453 | (setq count (1- count))) | |
454 | newname)) | |
b4da00e9 RM |
455 | \f |
456 | (defun switch-to-buffer-other-window (buffer) | |
457 | "Select buffer BUFFER in another window." | |
458 | (interactive "BSwitch to buffer in other window: ") | |
459 | (let ((pop-up-windows t)) | |
460 | (pop-to-buffer buffer t))) | |
461 | ||
f98955ea JB |
462 | (defun switch-to-buffer-other-frame (buffer) |
463 | "Switch to buffer BUFFER in another frame." | |
464 | (interactive "BSwitch to buffer in other frame: ") | |
465 | (let ((pop-up-frames t)) | |
336b7f41 RS |
466 | (pop-to-buffer buffer t) |
467 | (raise-frame (window-frame (selected-window))))) | |
5bbbceb1 | 468 | |
b4da00e9 RM |
469 | (defun find-file (filename) |
470 | "Edit file FILENAME. | |
471 | Switch to a buffer visiting file FILENAME, | |
472 | creating one if none already exists." | |
473 | (interactive "FFind file: ") | |
474 | (switch-to-buffer (find-file-noselect filename))) | |
475 | ||
476 | (defun find-file-other-window (filename) | |
477 | "Edit file FILENAME, in another window. | |
478 | May create a new window, or reuse an existing one. | |
479 | See the function `display-buffer'." | |
480 | (interactive "FFind file in other window: ") | |
481 | (switch-to-buffer-other-window (find-file-noselect filename))) | |
482 | ||
f98955ea JB |
483 | (defun find-file-other-frame (filename) |
484 | "Edit file FILENAME, in another frame. | |
485 | May create a new frame, or reuse an existing one. | |
5bbbceb1 | 486 | See the function `display-buffer'." |
f98955ea JB |
487 | (interactive "FFind file in other frame: ") |
488 | (switch-to-buffer-other-frame (find-file-noselect filename))) | |
5bbbceb1 | 489 | |
b4da00e9 RM |
490 | (defun find-file-read-only (filename) |
491 | "Edit file FILENAME but don't allow changes. | |
492 | Like \\[find-file] but marks buffer as read-only. | |
493 | Use \\[toggle-read-only] to permit editing." | |
494 | (interactive "fFind file read-only: ") | |
495 | (find-file filename) | |
320b4233 RS |
496 | (setq buffer-read-only t) |
497 | (current-buffer)) | |
b4da00e9 RM |
498 | |
499 | (defun find-file-read-only-other-window (filename) | |
500 | "Edit file FILENAME in another window but don't allow changes. | |
501 | Like \\[find-file-other-window] but marks buffer as read-only. | |
502 | Use \\[toggle-read-only] to permit editing." | |
503 | (interactive "fFind file read-only other window: ") | |
9466a1f6 | 504 | (find-file-other-window filename) |
320b4233 RS |
505 | (setq buffer-read-only t) |
506 | (current-buffer)) | |
b4da00e9 | 507 | |
f98955ea JB |
508 | (defun find-file-read-only-other-frame (filename) |
509 | "Edit file FILENAME in another frame but don't allow changes. | |
510 | Like \\[find-file-other-frame] but marks buffer as read-only. | |
5bbbceb1 | 511 | Use \\[toggle-read-only] to permit editing." |
f98955ea JB |
512 | (interactive "fFind file read-only other frame: ") |
513 | (find-file-other-frame filename) | |
320b4233 RS |
514 | (setq buffer-read-only t) |
515 | (current-buffer)) | |
5bbbceb1 | 516 | |
60eaf370 RS |
517 | (defun find-alternate-file-other-window (filename) |
518 | "Find file FILENAME as a replacement for the file in the next window. | |
519 | This command does not select that window." | |
520 | (interactive | |
521 | (save-selected-window | |
522 | (other-window 1) | |
523 | (let ((file buffer-file-name) | |
524 | (file-name nil) | |
525 | (file-dir nil)) | |
526 | (and file | |
527 | (setq file-name (file-name-nondirectory file) | |
528 | file-dir (file-name-directory file))) | |
529 | (list (read-file-name | |
530 | "Find alternate file: " file-dir nil nil file-name))))) | |
531 | (if (one-window-p) | |
532 | (find-file-other-window filename) | |
533 | (save-selected-window | |
534 | (other-window 1) | |
535 | (find-alternate-file filename)))) | |
536 | ||
b4da00e9 RM |
537 | (defun find-alternate-file (filename) |
538 | "Find file FILENAME, select its buffer, kill previous buffer. | |
539 | If the current buffer now contains an empty file that you just visited | |
540 | \(presumably by mistake), use this command to visit the file you really want." | |
541 | (interactive | |
542 | (let ((file buffer-file-name) | |
543 | (file-name nil) | |
544 | (file-dir nil)) | |
545 | (and file | |
546 | (setq file-name (file-name-nondirectory file) | |
547 | file-dir (file-name-directory file))) | |
a61f59b4 JA |
548 | (list (read-file-name |
549 | "Find alternate file: " file-dir nil nil file-name)))) | |
2aa8cc2d | 550 | (and (buffer-modified-p) (buffer-file-name) |
b4da00e9 RM |
551 | ;; (not buffer-read-only) |
552 | (not (yes-or-no-p (format "Buffer %s is modified; kill anyway? " | |
553 | (buffer-name)))) | |
554 | (error "Aborted")) | |
555 | (let ((obuf (current-buffer)) | |
556 | (ofile buffer-file-name) | |
8bb27285 RS |
557 | (onum buffer-file-number) |
558 | (otrue buffer-file-truename) | |
b4da00e9 | 559 | (oname (buffer-name))) |
baf9b8c4 RS |
560 | (if (get-buffer " **lose**") |
561 | (kill-buffer " **lose**")) | |
b4da00e9 RM |
562 | (rename-buffer " **lose**") |
563 | (setq buffer-file-name nil) | |
8bb27285 RS |
564 | (setq buffer-file-number nil) |
565 | (setq buffer-file-truename nil) | |
b4da00e9 RM |
566 | (unwind-protect |
567 | (progn | |
568 | (unlock-buffer) | |
569 | (find-file filename)) | |
570 | (cond ((eq obuf (current-buffer)) | |
571 | (setq buffer-file-name ofile) | |
8bb27285 RS |
572 | (setq buffer-file-number onum) |
573 | (setq buffer-file-truename otrue) | |
b4da00e9 RM |
574 | (lock-buffer) |
575 | (rename-buffer oname)))) | |
576 | (or (eq (current-buffer) obuf) | |
577 | (kill-buffer obuf)))) | |
578 | ||
579 | (defun create-file-buffer (filename) | |
580 | "Create a suitably named buffer for visiting FILENAME, and return it. | |
581 | FILENAME (sans directory) is used unchanged if that name is free; | |
582 | otherwise a string <2> or <3> or ... is appended to get an unused name." | |
583 | (let ((lastname (file-name-nondirectory filename))) | |
584 | (if (string= lastname "") | |
585 | (setq lastname filename)) | |
586 | (generate-new-buffer lastname))) | |
587 | ||
5bbbceb1 JB |
588 | (defun generate-new-buffer (name) |
589 | "Create and return a buffer with a name based on NAME. | |
29165787 | 590 | Choose the buffer's name using `generate-new-buffer-name'." |
5bbbceb1 JB |
591 | (get-buffer-create (generate-new-buffer-name name))) |
592 | ||
e373f201 JB |
593 | (defconst automount-dir-prefix "^/tmp_mnt/" |
594 | "Regexp to match the automounter prefix in a directory name.") | |
595 | ||
ffb3a4db | 596 | (defvar abbreviated-home-dir nil |
292297c6 | 597 | "The user's homedir abbreviated according to `directory-abbrev-list'.") |
ffb3a4db | 598 | |
5bbbceb1 | 599 | (defun abbreviate-file-name (filename) |
29165787 | 600 | "Return a version of FILENAME shortened using `directory-abbrev-alist'. |
5bbbceb1 | 601 | This also substitutes \"~\" for the user's home directory. |
29165787 | 602 | Type \\[describe-variable] directory-abbrev-alist RET for more information." |
e373f201 JB |
603 | ;; Get rid of the prefixes added by the automounter. |
604 | (if (and (string-match automount-dir-prefix filename) | |
605 | (file-exists-p (file-name-directory | |
606 | (substring filename (1- (match-end 0)))))) | |
607 | (setq filename (substring filename (1- (match-end 0))))) | |
5bbbceb1 | 608 | (let ((tail directory-abbrev-alist)) |
ffb3a4db RS |
609 | ;; If any elt of directory-abbrev-alist matches this name, |
610 | ;; abbreviate accordingly. | |
5bbbceb1 JB |
611 | (while tail |
612 | (if (string-match (car (car tail)) filename) | |
613 | (setq filename | |
614 | (concat (cdr (car tail)) (substring filename (match-end 0))))) | |
615 | (setq tail (cdr tail))) | |
ffb3a4db RS |
616 | ;; Compute and save the abbreviated homedir name. |
617 | ;; We defer computing this until the first time it's needed, to | |
618 | ;; give time for directory-abbrev-alist to be set properly. | |
e98dda89 RS |
619 | ;; We include a slash at the end, to avoid spurious matches |
620 | ;; such as `/usr/foobar' when the home dir is `/usr/foo'. | |
ffb3a4db RS |
621 | (or abbreviated-home-dir |
622 | (setq abbreviated-home-dir | |
623 | (let ((abbreviated-home-dir "$foo")) | |
3a8a836d RS |
624 | (concat "^" (abbreviate-file-name (expand-file-name "~")) |
625 | "\\(/\\|$\\)")))) | |
626 | ||
ffb3a4db RS |
627 | ;; If FILENAME starts with the abbreviated homedir, |
628 | ;; make it start with `~' instead. | |
ca33ccb5 RS |
629 | (if (and (string-match abbreviated-home-dir filename) |
630 | ;; If the home dir is just /, don't change it. | |
631 | (not (and (= (match-end 0) 1) | |
288201bd | 632 | (= (aref filename 0) ?/))) |
c32d49e8 RS |
633 | (not (and (or (eq system-type 'ms-dos) |
634 | (eq system-type 'windows-nt)) | |
288201bd RS |
635 | (save-match-data |
636 | (string-match "^[a-zA-Z]:/$" filename))))) | |
5bbbceb1 | 637 | (setq filename |
28dbf501 | 638 | (concat "~" |
3a8a836d | 639 | (substring filename (match-beginning 1) (match-end 1)) |
28dbf501 | 640 | (substring filename (match-end 0))))) |
5bbbceb1 JB |
641 | filename)) |
642 | ||
1770543d RS |
643 | (defvar find-file-not-true-dirname-list nil |
644 | "*List of logical names for which visiting shouldn't save the true dirname. | |
645 | On VMS, when you visit a file using a logical name that searches a path, | |
646 | you may or may not want the visited file name to record the specific | |
647 | directory where the file was found. If you *do not* want that, add the logical | |
648 | name to this list as a string.") | |
649 | ||
138c44f6 KH |
650 | (defun find-buffer-visiting (filename) |
651 | "Return the buffer visiting file FILENAME (a string). | |
652 | This is like `get-file-buffer', except that it checks for any buffer | |
653 | visiting the same file, possibly under a different name. | |
654 | If there is no such live buffer, return nil." | |
655 | (let ((buf (get-file-buffer filename)) | |
656 | (truename (abbreviate-file-name (file-truename filename)))) | |
657 | (or buf | |
658 | (let ((list (buffer-list)) found) | |
659 | (while (and (not found) list) | |
660 | (save-excursion | |
661 | (set-buffer (car list)) | |
662 | (if (and buffer-file-name | |
663 | (string= buffer-file-truename truename)) | |
664 | (setq found (car list)))) | |
665 | (setq list (cdr list))) | |
666 | found) | |
0f933cf6 | 667 | (let ((number (nthcdr 10 (file-attributes truename))) |
138c44f6 | 668 | (list (buffer-list)) found) |
181c830f RS |
669 | (and number |
670 | (while (and (not found) list) | |
671 | (save-excursion | |
672 | (set-buffer (car list)) | |
d49ab5a0 RS |
673 | (if (and buffer-file-name |
674 | (equal buffer-file-number number) | |
181c830f RS |
675 | ;; Verify this buffer's file number |
676 | ;; still belongs to its file. | |
677 | (file-exists-p buffer-file-name) | |
678 | (equal (nthcdr 10 (file-attributes buffer-file-name)) | |
679 | number)) | |
680 | (setq found (car list)))) | |
681 | (setq list (cdr list)))) | |
138c44f6 KH |
682 | found)))) |
683 | ||
40dfe94d RS |
684 | (defun insert-file-contents-literally (filename &optional visit beg end replace) |
685 | "Like `insert-file-contents', q.v., but only reads in the file. | |
686 | A buffer may be modified in several ways after reading into the buffer due | |
687 | to advanced Emacs features, such as file-name-handlers, format decoding, | |
688 | find-file-hooks, etc. | |
689 | This function ensures that none of these modifications will take place." | |
690 | (let ((file-name-handler-alist nil) | |
691 | (format-alist nil) | |
692 | (after-insert-file-functions nil) | |
693 | (find-buffer-file-type-function | |
694 | (if (fboundp 'find-buffer-file-type) | |
695 | (symbol-function 'find-buffer-file-type) | |
696 | nil))) | |
697 | (unwind-protect | |
698 | (progn | |
699 | (fset 'find-buffer-file-type (lambda (filename) t)) | |
700 | (insert-file-contents filename visit beg end replace)) | |
701 | (if find-buffer-file-type-function | |
702 | (fset 'find-buffer-file-type find-buffer-file-type-function) | |
703 | (fmakunbound 'find-buffer-file-type))))) | |
704 | ||
705 | (defun find-file-noselect (filename &optional nowarn rawfile) | |
b4da00e9 RM |
706 | "Read file FILENAME into a buffer and return the buffer. |
707 | If a buffer exists visiting FILENAME, return that one, but | |
708 | verify that the file has not changed since visited or saved. | |
709 | The buffer is not selected, just returned to the caller." | |
e373f201 JB |
710 | (setq filename |
711 | (abbreviate-file-name | |
712 | (expand-file-name filename))) | |
b4da00e9 RM |
713 | (if (file-directory-p filename) |
714 | (if find-file-run-dired | |
4147a3cc KH |
715 | (dired-noselect (if find-file-visit-truename |
716 | (abbreviate-file-name (file-truename filename)) | |
717 | filename)) | |
b4da00e9 | 718 | (error "%s is a directory." filename)) |
f3e23606 RS |
719 | (let* ((buf (get-file-buffer filename)) |
720 | (truename (abbreviate-file-name (file-truename filename))) | |
721 | (number (nthcdr 10 (file-attributes truename))) | |
722 | ;; Find any buffer for a file which has same truename. | |
138c44f6 | 723 | (other (and (not buf) (find-buffer-visiting filename))) |
f3e23606 RS |
724 | error) |
725 | ;; Let user know if there is a buffer with the same truename. | |
138c44f6 KH |
726 | (if other |
727 | (progn | |
327bebe8 RS |
728 | (or nowarn |
729 | (string-equal filename (buffer-file-name other)) | |
730 | (message "%s and %s are the same file" | |
731 | filename (buffer-file-name other))) | |
138c44f6 KH |
732 | ;; Optionally also find that buffer. |
733 | (if (or find-file-existing-other-name find-file-visit-truename) | |
734 | (setq buf other)))) | |
b4da00e9 RM |
735 | (if buf |
736 | (or nowarn | |
737 | (verify-visited-file-modtime buf) | |
738 | (cond ((not (file-exists-p filename)) | |
739 | (error "File %s no longer exists!" filename)) | |
740 | ((yes-or-no-p | |
b7d19f4a KH |
741 | (if (string= (file-name-nondirectory filename) |
742 | (buffer-name buf)) | |
743 | (format | |
744 | (if (buffer-modified-p buf) | |
745 | "File %s changed on disk. Discard your edits? " | |
746 | "File %s changed on disk. Reread from disk? ") | |
747 | (file-name-nondirectory filename)) | |
748 | (format | |
749 | (if (buffer-modified-p buf) | |
750 | "File %s changed on disk. Discard your edits in %s? " | |
751 | "File %s changed on disk. Reread from disk into %s? ") | |
752 | (file-name-nondirectory filename) | |
753 | (buffer-name buf)))) | |
b4da00e9 RM |
754 | (save-excursion |
755 | (set-buffer buf) | |
756 | (revert-buffer t t))))) | |
757 | (save-excursion | |
f3e23606 RS |
758 | ;;; The truename stuff makes this obsolete. |
759 | ;;; (let* ((link-name (car (file-attributes filename))) | |
760 | ;;; (linked-buf (and (stringp link-name) | |
761 | ;;; (get-file-buffer link-name)))) | |
762 | ;;; (if (bufferp linked-buf) | |
763 | ;;; (message "Symbolic link to file in buffer %s" | |
764 | ;;; (buffer-name linked-buf)))) | |
b4da00e9 | 765 | (setq buf (create-file-buffer filename)) |
a2e12c0c | 766 | (set-buffer-major-mode buf) |
b4da00e9 RM |
767 | (set-buffer buf) |
768 | (erase-buffer) | |
40dfe94d RS |
769 | (if rawfile |
770 | (condition-case () | |
771 | (insert-file-contents-literally filename t) | |
772 | (file-error | |
773 | ;; Unconditionally set error | |
774 | (setq error t))) | |
775 | (condition-case () | |
776 | (insert-file-contents filename t) | |
777 | (file-error | |
778 | ;; Run find-file-not-found-hooks until one returns non-nil. | |
779 | (or (run-hook-with-args-until-success 'find-file-not-found-hooks) | |
780 | ;; If they fail too, set error. | |
781 | (setq error t))))) | |
f3e23606 | 782 | ;; Find the file's truename, and maybe use that as visited name. |
138c44f6 | 783 | (setq buffer-file-truename truename) |
1770543d RS |
784 | (setq buffer-file-number number) |
785 | ;; On VMS, we may want to remember which directory in a search list | |
786 | ;; the file was found in. | |
787 | (and (eq system-type 'vax-vms) | |
788 | (let (logical) | |
789 | (if (string-match ":" (file-name-directory filename)) | |
790 | (setq logical (substring (file-name-directory filename) | |
791 | 0 (match-beginning 0)))) | |
792 | (not (member logical find-file-not-true-dirname-list))) | |
793 | (setq buffer-file-name buffer-file-truename)) | |
1cc2fbeb | 794 | (if find-file-visit-truename |
27d0420c RS |
795 | (setq buffer-file-name |
796 | (setq filename | |
797 | (expand-file-name buffer-file-truename)))) | |
b4da00e9 RM |
798 | ;; Set buffer's default directory to that of the file. |
799 | (setq default-directory (file-name-directory filename)) | |
800 | ;; Turn off backup files for certain file names. Since | |
801 | ;; this is a permanent local, the major mode won't eliminate it. | |
802 | (and (not (funcall backup-enable-predicate buffer-file-name)) | |
803 | (progn | |
804 | (make-local-variable 'backup-inhibited) | |
805 | (setq backup-inhibited t))) | |
40dfe94d RS |
806 | (if rawfile |
807 | nil | |
808 | (after-find-file error (not nowarn))))) | |
b4da00e9 RM |
809 | buf))) |
810 | \f | |
f7d786d0 RS |
811 | (defvar after-find-file-from-revert-buffer nil) |
812 | ||
e0ab8879 RS |
813 | (defun after-find-file (&optional error warn noauto |
814 | after-find-file-from-revert-buffer) | |
b4da00e9 RM |
815 | "Called after finding a file and by the default revert function. |
816 | Sets buffer mode, parses local variables. | |
8cfb9d46 | 817 | Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an |
b4da00e9 RM |
818 | error in reading the file. WARN non-nil means warn if there |
819 | exists an auto-save file more recent than the visited file. | |
8cfb9d46 | 820 | NOAUTO means don't mess with auto-save mode. |
e0ab8879 RS |
821 | Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil |
822 | means this call was from `revert-buffer'. | |
b4da00e9 RM |
823 | Finishes by calling the functions in `find-file-hooks'." |
824 | (setq buffer-read-only (not (file-writable-p buffer-file-name))) | |
825 | (if noninteractive | |
826 | nil | |
827 | (let* (not-serious | |
828 | (msg | |
829 | (cond ((and error (file-attributes buffer-file-name)) | |
830 | (setq buffer-read-only t) | |
ff78d520 | 831 | "File exists, but cannot be read.") |
b4da00e9 RM |
832 | ((not buffer-read-only) |
833 | (if (and warn | |
834 | (file-newer-than-file-p (make-auto-save-file-name) | |
835 | buffer-file-name)) | |
836 | "Auto save file is newer; consider M-x recover-file" | |
837 | (setq not-serious t) | |
838 | (if error "(New file)" nil))) | |
839 | ((not error) | |
840 | (setq not-serious t) | |
841 | "Note: file is write protected") | |
842 | ((file-attributes (directory-file-name default-directory)) | |
843 | "File not found and directory write-protected") | |
4e43240a RS |
844 | ((file-exists-p (file-name-directory buffer-file-name)) |
845 | (setq buffer-read-only nil)) | |
b4da00e9 | 846 | (t |
5bbbceb1 | 847 | (setq buffer-read-only nil) |
4e43240a RS |
848 | (if (file-exists-p (file-name-directory (directory-file-name (file-name-directory buffer-file-name)))) |
849 | "Use M-x make-dir RET RET to create the directory" | |
850 | "Use C-u M-x make-dir RET RET to create directory and its parents"))))) | |
b4da00e9 RM |
851 | (if msg |
852 | (progn | |
853 | (message msg) | |
854 | (or not-serious (sit-for 1 nil t))))) | |
8cfb9d46 | 855 | (if (and auto-save-default (not noauto)) |
b4da00e9 RM |
856 | (auto-save-mode t))) |
857 | (normal-mode t) | |
a4f5efdc | 858 | (run-hooks 'find-file-hooks)) |
b4da00e9 RM |
859 | |
860 | (defun normal-mode (&optional find-file) | |
861 | "Choose the major mode for this buffer automatically. | |
862 | Also sets up any specified local variables of the file. | |
863 | Uses the visited file name, the -*- line, and the local variables spec. | |
864 | ||
865 | This function is called automatically from `find-file'. In that case, | |
866 | we may set up specified local variables depending on the value of | |
867 | `enable-local-variables': if it is t, we do; if it is nil, we don't; | |
868 | otherwise, we query. `enable-local-variables' is ignored if you | |
869 | run `normal-mode' explicitly." | |
870 | (interactive) | |
871 | (or find-file (funcall (or default-major-mode 'fundamental-mode))) | |
872 | (condition-case err | |
873 | (set-auto-mode) | |
874 | (error (message "File mode specification error: %s" | |
875 | (prin1-to-string err)))) | |
876 | (condition-case err | |
7b3f3dc2 JB |
877 | (let ((enable-local-variables (or (not find-file) |
878 | enable-local-variables))) | |
879 | (hack-local-variables)) | |
b4da00e9 RM |
880 | (error (message "File local-variables error: %s" |
881 | (prin1-to-string err))))) | |
882 | ||
f76e0cd0 RS |
883 | (defvar auto-mode-alist |
884 | '(("\\.text\\'" . text-mode) | |
885 | ("\\.c\\'" . c-mode) | |
886 | ("\\.h\\'" . c-mode) | |
887 | ("\\.tex\\'" . tex-mode) | |
888 | ("\\.ltx\\'" . latex-mode) | |
889 | ("\\.el\\'" . emacs-lisp-mode) | |
890 | ("\\.mm\\'" . nroff-mode) | |
891 | ("\\.me\\'" . nroff-mode) | |
892 | ("\\.ms\\'" . nroff-mode) | |
893 | ("\\.man\\'" . nroff-mode) | |
894 | ("\\.scm\\'" . scheme-mode) | |
895 | ("\\.l\\'" . lisp-mode) | |
896 | ("\\.lisp\\'" . lisp-mode) | |
897 | ("\\.f\\'" . fortran-mode) | |
898 | ("\\.for\\'" . fortran-mode) | |
899 | ("\\.p\\'" . pascal-mode) | |
900 | ("\\.pas\\'" . pascal-mode) | |
901 | ("\\.mss\\'" . scribe-mode) | |
902 | ("\\.ad[abs]\\'" . ada-mode) | |
903 | ("\\.icn\\'" . icon-mode) | |
904 | ("\\.pl\\'" . perl-mode) | |
905 | ("\\.cc\\'" . c++-mode) | |
906 | ("\\.hh\\'" . c++-mode) | |
907 | ("\\.C\\'" . c++-mode) | |
908 | ("\\.H\\'" . c++-mode) | |
909 | ("\\.cpp\\'" . c++-mode) | |
910 | ("\\.cxx\\'" . c++-mode) | |
911 | ("\\.hxx\\'" . c++-mode) | |
912 | ("\\.c\\+\\+\\'" . c++-mode) | |
913 | ("\\.h\\+\\+\\'" . c++-mode) | |
914 | ("\\.mk\\'" . makefile-mode) | |
915 | ("[Mm]akefile\\(.in\\)?\\'" . makefile-mode) | |
7b3f3dc2 JB |
916 | ;;; Less common extensions come here |
917 | ;;; so more common ones above are found faster. | |
f76e0cd0 RS |
918 | ("\\.texinfo\\'" . texinfo-mode) |
919 | ("\\.texi\\'" . texinfo-mode) | |
920 | ("\\.s\\'" . asm-mode) | |
600a5f71 KH |
921 | ("\\.S\\'" . asm-mode) |
922 | ("\\.asm\\'" . asm-mode) | |
f76e0cd0 RS |
923 | ("ChangeLog\\'" . change-log-mode) |
924 | ("change.log\\'" . change-log-mode) | |
925 | ("changelo\\'" . change-log-mode) | |
926 | ("ChangeLog.[0-9]+\\'" . change-log-mode) | |
927 | ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode) | |
928 | ("\\.scm\\.[0-9]*\\'" . scheme-mode) | |
c1fe251a KH |
929 | ;;; The following should come after the ChangeLog pattern |
930 | ;;; for the sake of ChangeLog.1, etc. | |
931 | ;;; and after the .scm.[0-9] pattern too. | |
f76e0cd0 RS |
932 | ("\\.[12345678]\\'" . nroff-mode) |
933 | ("\\.TeX\\'" . tex-mode) | |
934 | ("\\.sty\\'" . latex-mode) | |
935 | ("\\.cls\\'" . latex-mode) ;LaTeX 2e class | |
936 | ("\\.bbl\\'" . latex-mode) | |
937 | ("\\.bib\\'" . bibtex-mode) | |
938 | ("\\.article\\'" . text-mode) | |
939 | ("\\.letter\\'" . text-mode) | |
940 | ("\\.tcl\\'" . tcl-mode) | |
941 | ("\\.f90\\'" . f90-mode) | |
942 | ("\\.lsp\\'" . lisp-mode) | |
943 | ("\\.awk\\'" . awk-mode) | |
944 | ("\\.prolog\\'" . prolog-mode) | |
945 | ("\\.tar\\'" . tar-mode) | |
946 | ("\\.\\(arc\\|zip\\|lzh\\|zoo\\)\\'" . archive-mode) | |
947 | ;; Mailer puts message to be edited in | |
948 | ;; /tmp/Re.... or Message | |
949 | ("^/tmp/Re" . text-mode) | |
950 | ("/Message[0-9]*\\'" . text-mode) | |
951 | ("/drafts/[0-9]+\\'" . mh-letter-mode) | |
952 | ;; some news reader is reported to use this | |
953 | ("^/tmp/fol/" . text-mode) | |
954 | ("\\.y\\'" . c-mode) | |
955 | ("\\.lex\\'" . c-mode) | |
956 | ("\\.oak\\'" . scheme-mode) | |
957 | ("\\.sgm\\'" . sgml-mode) | |
958 | ("\\.sgml\\'" . sgml-mode) | |
959 | ("\\.dtd\\'" . sgml-mode) | |
960 | ;; .emacs following a directory delimiter | |
961 | ;; in either Unix or VMS syntax. | |
962 | ("[]>:/]\\..*emacs\\'" . emacs-lisp-mode) | |
963 | ;; _emacs following a directory delimiter | |
964 | ;; in MsDos syntax | |
965 | ("[:/]_emacs\\'" . emacs-lisp-mode) | |
966 | ("\\.ml\\'" . lisp-mode)) | |
7b3f3dc2 JB |
967 | "\ |
968 | Alist of filename patterns vs corresponding major mode functions. | |
116987ba RS |
969 | Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL). |
970 | \(NON-NIL stands for anything that is not nil; the value does not matter.) | |
971 | Visiting a file whose name matches REGEXP specifies FUNCTION as the | |
972 | mode function to use. FUNCTION will be called, unless it is nil. | |
973 | ||
974 | If the element has the form (REGEXP FUNCTION NON-NIL), then after | |
975 | calling FUNCTION (if it's not nil), we delete the suffix that matched | |
976 | REGEXP and search the list again for another match.") | |
7b3f3dc2 | 977 | |
c907d156 RS |
978 | (defconst interpreter-mode-alist |
979 | '(("perl" . perl-mode) | |
c907d156 | 980 | ("wish" . tcl-mode) |
e3998da1 | 981 | ("wishx" . tcl-mode) |
8db739de | 982 | ("tcl" . tcl-mode) |
e3998da1 | 983 | ("tclsh" . tcl-mode) |
8db739de | 984 | ("awk" . awk-mode) |
d4f567a1 | 985 | ("nawk" . awk-mode) |
8db739de NF |
986 | ("gawk" . awk-mode) |
987 | ("scm" . scheme-mode)) | |
c907d156 RS |
988 | "Alist mapping interpreter names to major modes. |
989 | This alist applies to files whose first line starts with `#!'. | |
990 | Each element looks like (INTERPRETER . MODE). | |
991 | The car of each element is compared with | |
992 | the name of the interpreter specified in the first line. | |
993 | If it matches, mode MODE is selected.") | |
994 | ||
b20ff6d0 | 995 | (defconst inhibit-first-line-modes-regexps '("\\.tar\\'") |
45fb3bb8 | 996 | "List of regexps; if one matches a file name, don't look for `-*-'.") |
a0c9f21b | 997 | |
b20ff6d0 RS |
998 | (defconst inhibit-first-line-modes-suffixes nil |
999 | "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'. | |
1000 | When checking `inhibit-first-line-modes-regexps', we first discard | |
1001 | from the end of the file name anything that matches one of these regexps.") | |
1002 | ||
bb157910 RS |
1003 | (defvar user-init-file |
1004 | "" ; set by command-line | |
1005 | "File name including directory of user's initialization file.") | |
1006 | ||
b4da00e9 RM |
1007 | (defun set-auto-mode () |
1008 | "Select major mode appropriate for current buffer. | |
e3998da1 RS |
1009 | This checks for a -*- mode tag in the buffer's text, |
1010 | compares the filename against the entries in `auto-mode-alist', | |
1011 | or checks the interpreter that runs this file against | |
1012 | `interpreter-mode-alist'. | |
1013 | ||
1014 | It does not check for the `mode:' local variable in the | |
1015 | Local Variables section of the file; for that, use `hack-local-variables'. | |
7b3f3dc2 | 1016 | |
f3e23606 | 1017 | If `enable-local-variables' is nil, this function does not check for a |
7b3f3dc2 | 1018 | -*- mode tag." |
b4da00e9 | 1019 | ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- |
d0fc03ef | 1020 | (let (beg end done modes) |
b4da00e9 RM |
1021 | (save-excursion |
1022 | (goto-char (point-min)) | |
1023 | (skip-chars-forward " \t\n") | |
9fa7bfe5 RS |
1024 | (and enable-local-variables |
1025 | ;; Don't look for -*- if this file name matches any | |
45fb3bb8 | 1026 | ;; of the regexps in inhibit-first-line-modes-regexps. |
cae111fa | 1027 | (let ((temp inhibit-first-line-modes-regexps) |
4bc3d240 RS |
1028 | (name (if buffer-file-name |
1029 | (file-name-sans-versions buffer-file-name) | |
1030 | (buffer-name)))) | |
38832b4c KH |
1031 | (while (let ((sufs inhibit-first-line-modes-suffixes)) |
1032 | (while (and sufs (not (string-match (car sufs) name))) | |
1033 | (setq sufs (cdr sufs))) | |
1034 | sufs) | |
1035 | (setq name (substring name 0 (match-beginning 0)))) | |
9fa7bfe5 | 1036 | (while (and temp |
b20ff6d0 | 1037 | (not (string-match (car temp) name))) |
9fa7bfe5 RS |
1038 | (setq temp (cdr temp))) |
1039 | (not temp)) | |
1040 | (search-forward "-*-" (save-excursion | |
1041 | ;; If the file begins with "#!" | |
1042 | ;; (exec interpreter magic), look | |
1043 | ;; for mode frobs in the first two | |
1044 | ;; lines. You cannot necessarily | |
1045 | ;; put them in the first line of | |
1046 | ;; such a file without screwing up | |
1047 | ;; the interpreter invocation. | |
1048 | (end-of-line (and (looking-at "^#!") 2)) | |
1049 | (point)) t) | |
1050 | (progn | |
1051 | (skip-chars-forward " \t") | |
1052 | (setq beg (point)) | |
1053 | (search-forward "-*-" | |
1054 | (save-excursion (end-of-line) (point)) | |
1055 | t)) | |
1056 | (progn | |
1057 | (forward-char -3) | |
1058 | (skip-chars-backward " \t") | |
1059 | (setq end (point)) | |
1060 | (goto-char beg) | |
1061 | (if (save-excursion (search-forward ":" end t)) | |
1062 | ;; Find all specifications for the `mode:' variable | |
57a0155c | 1063 | ;; and execute them left to right. |
9fa7bfe5 | 1064 | (while (let ((case-fold-search t)) |
6054fcc6 KH |
1065 | (or (and (looking-at "mode:") |
1066 | (goto-char (match-end 0))) | |
1067 | (re-search-forward "[ \t;]mode:" end t))) | |
9fa7bfe5 RS |
1068 | (skip-chars-forward " \t") |
1069 | (setq beg (point)) | |
1070 | (if (search-forward ";" end t) | |
1071 | (forward-char -1) | |
1072 | (goto-char end)) | |
1073 | (skip-chars-backward " \t") | |
d0fc03ef RS |
1074 | (setq modes (cons (intern (concat (downcase (buffer-substring beg (point))) "-mode")) |
1075 | modes))) | |
9fa7bfe5 | 1076 | ;; Simple -*-MODE-*- case. |
d0fc03ef RS |
1077 | (setq modes (cons (intern (concat (downcase (buffer-substring beg end)) |
1078 | "-mode")) | |
1079 | modes)))))) | |
1080 | ;; If we found modes to use, invoke them now, | |
1081 | ;; outside the save-excursion. | |
1082 | (if modes | |
1083 | (progn (mapcar 'funcall modes) | |
1084 | (setq done t))) | |
1085 | ;; If we didn't find a mode from a -*- line, try using the file name. | |
1086 | (if (and (not done) buffer-file-name) | |
1087 | (let ((name buffer-file-name) | |
1088 | (keep-going t)) | |
1089 | ;; Remove backup-suffixes from file name. | |
1090 | (setq name (file-name-sans-versions name)) | |
1091 | (while keep-going | |
1092 | (setq keep-going nil) | |
1093 | (let ((alist auto-mode-alist) | |
1094 | (mode nil)) | |
1095 | ;; Find first matching alist entry. | |
1096 | (let ((case-fold-search | |
1097 | (memq system-type '(vax-vms windows-nt)))) | |
1098 | (while (and (not mode) alist) | |
1099 | (if (string-match (car (car alist)) name) | |
1100 | (if (and (consp (cdr (car alist))) | |
1101 | (nth 2 (car alist))) | |
1102 | (progn | |
1103 | (setq mode (car (cdr (car alist))) | |
1104 | name (substring name 0 (match-beginning 0)) | |
1105 | keep-going t)) | |
1106 | (setq mode (cdr (car alist)) | |
1107 | keep-going nil))) | |
1108 | (setq alist (cdr alist)))) | |
1109 | (if mode | |
1110 | (funcall mode) | |
1111 | ;; If we can't deduce a mode from the file name, | |
1112 | ;; look for an interpreter specified in the first line. | |
1540e4e9 KH |
1113 | ;; As a special case, allow for things like "#!/bin/env perl", |
1114 | ;; which finds the interpreter anywhere in $PATH. | |
d0fc03ef RS |
1115 | (let ((interpreter |
1116 | (save-excursion | |
1117 | (goto-char (point-min)) | |
1540e4e9 KH |
1118 | (if (looking-at "#! *\\([^ \t\n]*/bin/env +\\)?\\([^ \t\n]+\\)") |
1119 | (buffer-substring (match-beginning 2) | |
1120 | (match-end 2)) | |
d0fc03ef RS |
1121 | ""))) |
1122 | elt) | |
1123 | ;; Map interpreter name to a mode. | |
1124 | (setq elt (assoc (file-name-nondirectory interpreter) | |
1125 | interpreter-mode-alist)) | |
1126 | (if elt | |
1127 | (funcall (cdr elt))))))))))) | |
b4da00e9 | 1128 | |
f3e23606 RS |
1129 | (defun hack-local-variables-prop-line () |
1130 | ;; Set local variables specified in the -*- line. | |
9fa7bfe5 RS |
1131 | ;; Ignore any specification for `mode:'; |
1132 | ;; set-auto-mode should already have handled that. | |
f3e23606 RS |
1133 | (save-excursion |
1134 | (goto-char (point-min)) | |
13a66180 KH |
1135 | (let ((result nil) |
1136 | (end (save-excursion (end-of-line (and (looking-at "^#!") 2)) (point)))) | |
f3e23606 RS |
1137 | ;; Parse the -*- line into the `result' alist. |
1138 | (cond ((not (search-forward "-*-" end t)) | |
1139 | ;; doesn't have one. | |
1140 | nil) | |
1141 | ((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)") | |
13a66180 KH |
1142 | ;; Simple form: "-*- MODENAME -*-". Already handled. |
1143 | nil) | |
f3e23606 RS |
1144 | (t |
1145 | ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-' | |
1146 | ;; (last ";" is optional). | |
1147 | (save-excursion | |
1148 | (if (search-forward "-*-" end t) | |
1149 | (setq end (- (point) 3)) | |
1150 | (error "-*- not terminated before end of line"))) | |
1151 | (while (< (point) end) | |
1152 | (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*") | |
1153 | (error "malformed -*- line")) | |
1154 | (goto-char (match-end 0)) | |
1c26a6f3 KH |
1155 | ;; There used to be a downcase here, |
1156 | ;; but the manual didn't say so, | |
1157 | ;; and people want to set var names that aren't all lc. | |
1158 | (let ((key (intern (buffer-substring | |
1159 | (match-beginning 1) | |
1160 | (match-end 1)))) | |
f3e23606 RS |
1161 | (val (save-restriction |
1162 | (narrow-to-region (point) end) | |
1163 | (read (current-buffer))))) | |
13a66180 KH |
1164 | (or (eq key 'mode) |
1165 | (setq result (cons (cons key val) result))) | |
f3e23606 RS |
1166 | (skip-chars-forward " \t;"))) |
1167 | (setq result (nreverse result)))) | |
f3e23606 RS |
1168 | |
1169 | (if (and result | |
1170 | (or (eq enable-local-variables t) | |
1171 | (and enable-local-variables | |
1172 | (save-window-excursion | |
6f931919 RS |
1173 | (condition-case nil |
1174 | (switch-to-buffer (current-buffer)) | |
1175 | (error | |
1176 | ;; If we fail to switch in the selected window, | |
1177 | ;; it is probably a minibuffer. | |
1178 | ;; So try another window. | |
1179 | (condition-case nil | |
1180 | (switch-to-buffer-other-window (current-buffer)) | |
1181 | (error | |
1182 | (switch-to-buffer-other-frame (current-buffer)))))) | |
f3e23606 RS |
1183 | (y-or-n-p (format "Set local variables as specified in -*- line of %s? " |
1184 | (file-name-nondirectory buffer-file-name))))))) | |
1185 | (while result | |
13a66180 | 1186 | (hack-one-local-variable (car (car result)) (cdr (car result))) |
9fa7bfe5 | 1187 | (setq result (cdr result))))))) |
f3e23606 | 1188 | |
1d517019 RS |
1189 | (defvar hack-local-variables-hook nil |
1190 | "Normal hook run after processing a file's local variables specs. | |
1191 | Major modes can use this to examine user-specified local variables | |
1192 | in order to initialize other data structure based on them.") | |
1193 | ||
7b3f3dc2 | 1194 | (defun hack-local-variables () |
5792c834 | 1195 | "Parse and put into effect this buffer's local variables spec." |
f3e23606 | 1196 | (hack-local-variables-prop-line) |
b4da00e9 RM |
1197 | ;; Look for "Local variables:" line in last page. |
1198 | (save-excursion | |
1199 | (goto-char (point-max)) | |
1200 | (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) | |
1201 | (if (let ((case-fold-search t)) | |
1202 | (and (search-forward "Local Variables:" nil t) | |
7b3f3dc2 | 1203 | (or (eq enable-local-variables t) |
b4da00e9 RM |
1204 | (and enable-local-variables |
1205 | (save-window-excursion | |
1206 | (switch-to-buffer (current-buffer)) | |
1207 | (save-excursion | |
1208 | (beginning-of-line) | |
1209 | (set-window-start (selected-window) (point))) | |
1210 | (y-or-n-p (format "Set local variables as specified at end of %s? " | |
51de78c1 RS |
1211 | (if buffer-file-name |
1212 | (file-name-nondirectory | |
1213 | buffer-file-name) | |
1214 | (concat "buffer " | |
1215 | (buffer-name)))))))))) | |
b4da00e9 | 1216 | (let ((continue t) |
2bba782c RS |
1217 | prefix prefixlen suffix beg |
1218 | (enable-local-eval enable-local-eval)) | |
b4da00e9 RM |
1219 | ;; The prefix is what comes before "local variables:" in its line. |
1220 | ;; The suffix is what comes after "local variables:" in its line. | |
1221 | (skip-chars-forward " \t") | |
1222 | (or (eolp) | |
1223 | (setq suffix (buffer-substring (point) | |
1224 | (progn (end-of-line) (point))))) | |
1225 | (goto-char (match-beginning 0)) | |
1226 | (or (bolp) | |
1227 | (setq prefix | |
1228 | (buffer-substring (point) | |
1229 | (progn (beginning-of-line) (point))))) | |
7b3f3dc2 | 1230 | |
b4da00e9 RM |
1231 | (if prefix (setq prefixlen (length prefix) |
1232 | prefix (regexp-quote prefix))) | |
1233 | (if suffix (setq suffix (concat (regexp-quote suffix) "$"))) | |
1234 | (while continue | |
1235 | ;; Look at next local variable spec. | |
1236 | (if selective-display (re-search-forward "[\n\C-m]") | |
1237 | (forward-line 1)) | |
1238 | ;; Skip the prefix, if any. | |
1239 | (if prefix | |
1240 | (if (looking-at prefix) | |
1241 | (forward-char prefixlen) | |
1242 | (error "Local variables entry is missing the prefix"))) | |
1243 | ;; Find the variable name; strip whitespace. | |
1244 | (skip-chars-forward " \t") | |
1245 | (setq beg (point)) | |
1246 | (skip-chars-forward "^:\n") | |
1247 | (if (eolp) (error "Missing colon in local variables entry")) | |
1248 | (skip-chars-backward " \t") | |
1249 | (let* ((str (buffer-substring beg (point))) | |
1250 | (var (read str)) | |
1251 | val) | |
1252 | ;; Setting variable named "end" means end of list. | |
1253 | (if (string-equal (downcase str) "end") | |
1254 | (setq continue nil) | |
1255 | ;; Otherwise read the variable value. | |
1256 | (skip-chars-forward "^:") | |
1257 | (forward-char 1) | |
1258 | (setq val (read (current-buffer))) | |
1259 | (skip-chars-backward "\n") | |
1260 | (skip-chars-forward " \t") | |
1261 | (or (if suffix (looking-at suffix) (eolp)) | |
1262 | (error "Local variables entry is terminated incorrectly")) | |
1263 | ;; Set the variable. "Variables" mode and eval are funny. | |
1d517019 RS |
1264 | (hack-one-local-variable var val))))))) |
1265 | (run-hooks 'hack-local-variables-hook)) | |
f3e23606 RS |
1266 | |
1267 | (defconst ignored-local-variables | |
1268 | '(enable-local-eval) | |
1269 | "Variables to be ignored in a file's local variable spec.") | |
1270 | ||
be0218a8 | 1271 | ;; Get confirmation before setting these variables as locals in a file. |
05ef1cda | 1272 | (put 'debugger 'risky-local-variable t) |
f6fa3ee3 | 1273 | (put 'enable-local-eval 'risky-local-variable t) |
fce47eea | 1274 | (put 'ignored-local-variables 'risky-local-variable t) |
be0218a8 RS |
1275 | (put 'eval 'risky-local-variable t) |
1276 | (put 'file-name-handler-alist 'risky-local-variable t) | |
1277 | (put 'minor-mode-map-alist 'risky-local-variable t) | |
1278 | (put 'after-load-alist 'risky-local-variable t) | |
f6fa3ee3 RS |
1279 | (put 'buffer-file-name 'risky-local-variable t) |
1280 | (put 'buffer-auto-save-file-name 'risky-local-variable t) | |
1281 | (put 'buffer-file-truename 'risky-local-variable t) | |
b0ffcc0d RS |
1282 | (put 'exec-path 'risky-local-variable t) |
1283 | (put 'load-path 'risky-local-variable t) | |
1284 | (put 'exec-directory 'risky-local-variable t) | |
1285 | (put 'process-environment 'risky-local-variable t) | |
9afa8bf7 RS |
1286 | ;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode. |
1287 | (put 'outline-level 'risky-local-variable t) | |
d98b741d | 1288 | (put 'rmail-output-file-alist 'risky-local-variable t) |
f6fa3ee3 | 1289 | |
6672c42b RS |
1290 | ;; This one is safe because the user gets to check it before it is used. |
1291 | (put 'compile-command 'safe-local-variable t) | |
1292 | ||
d0bd3513 RS |
1293 | (defun hack-one-local-variable-quotep (exp) |
1294 | (and (consp exp) (eq (car exp) 'quote) (consp (cdr exp)))) | |
1295 | ||
f3e23606 RS |
1296 | ;; "Set" one variable in a local variables spec. |
1297 | ;; A few variable names are treated specially. | |
1298 | (defun hack-one-local-variable (var val) | |
1299 | (cond ((eq var 'mode) | |
1300 | (funcall (intern (concat (downcase (symbol-name val)) | |
1301 | "-mode")))) | |
1302 | ((memq var ignored-local-variables) | |
1303 | nil) | |
1304 | ;; "Setting" eval means either eval it or do nothing. | |
7d3221d7 | 1305 | ;; Likewise for setting hook variables. |
be0218a8 | 1306 | ((or (get var 'risky-local-variable) |
6672c42b RS |
1307 | (and |
1308 | (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$" | |
1309 | (symbol-name var)) | |
1310 | (not (get var 'safe-local-variable)))) | |
d0bd3513 RS |
1311 | ;; Permit evaling a put of a harmless property |
1312 | ;; if the args do nothing tricky. | |
1313 | (if (or (and (eq var 'eval) | |
1314 | (consp val) | |
1315 | (eq (car val) 'put) | |
1316 | (hack-one-local-variable-quotep (nth 1 val)) | |
1317 | (hack-one-local-variable-quotep (nth 2 val)) | |
1318 | ;; Only allow safe values of lisp-indent-hook; | |
1319 | ;; not functions. | |
1320 | (or (numberp (nth 3 val)) | |
dc417415 | 1321 | (equal (nth 3 val) ''defun)) |
d0bd3513 RS |
1322 | (memq (nth 1 (nth 2 val)) |
1323 | '(lisp-indent-hook))) | |
1324 | ;; Permit eval if not root and user says ok. | |
c7e62660 | 1325 | (and (not (zerop (user-uid))) |
d0bd3513 RS |
1326 | (or (eq enable-local-eval t) |
1327 | (and enable-local-eval | |
1328 | (save-window-excursion | |
1329 | (switch-to-buffer (current-buffer)) | |
1330 | (save-excursion | |
1331 | (beginning-of-line) | |
1332 | (set-window-start (selected-window) (point))) | |
1333 | (setq enable-local-eval | |
1334 | (y-or-n-p (format "Process `eval' or hook local variables in file %s? " | |
1335 | (file-name-nondirectory buffer-file-name))))))))) | |
7d3221d7 RS |
1336 | (if (eq var 'eval) |
1337 | (save-excursion (eval val)) | |
1338 | (make-local-variable var) | |
1339 | (set var val)) | |
f3e23606 RS |
1340 | (message "Ignoring `eval:' in file's local variables"))) |
1341 | ;; Ordinary variable, really set it. | |
1342 | (t (make-local-variable var) | |
1343 | (set var val)))) | |
1344 | ||
b4da00e9 RM |
1345 | \f |
1346 | (defun set-visited-file-name (filename) | |
1347 | "Change name of file visited in current buffer to FILENAME. | |
1348 | The next time the buffer is saved it will go in the newly specified file. | |
1349 | nil or empty string as argument means make buffer not be visiting any file. | |
1350 | Remember to delete the initial contents of the minibuffer | |
1351 | if you wish to pass an empty string as the argument." | |
1352 | (interactive "FSet visited file name: ") | |
c11a94fe RS |
1353 | (if (buffer-base-buffer) |
1354 | (error "An indirect buffer cannot visit a file")) | |
a522e5bf RS |
1355 | (let (truename) |
1356 | (if filename | |
1357 | (setq filename | |
1358 | (if (string-equal filename "") | |
1359 | nil | |
1360 | (expand-file-name filename)))) | |
1361 | (if filename | |
1362 | (progn | |
1363 | (setq truename (file-truename filename)) | |
1364 | (if find-file-visit-truename | |
a522e5bf RS |
1365 | (setq filename truename)))) |
1366 | (or (equal filename buffer-file-name) | |
1367 | (progn | |
1368 | (and filename (lock-buffer filename)) | |
1369 | (unlock-buffer))) | |
1370 | (setq buffer-file-name filename) | |
1371 | (if filename ; make buffer name reflect filename. | |
1372 | (let ((new-name (file-name-nondirectory buffer-file-name))) | |
1373 | (if (string= new-name "") | |
1374 | (error "Empty file name")) | |
1375 | (if (eq system-type 'vax-vms) | |
1376 | (setq new-name (downcase new-name))) | |
1377 | (setq default-directory (file-name-directory buffer-file-name)) | |
1378 | (or (string= new-name (buffer-name)) | |
1379 | (rename-buffer new-name t)))) | |
1380 | (setq buffer-backed-up nil) | |
1381 | (clear-visited-file-modtime) | |
8ccdc29e | 1382 | ;; Abbreviate the file names of the buffer. |
4826e97f | 1383 | (if truename |
8ccdc29e RS |
1384 | (progn |
1385 | (setq buffer-file-truename (abbreviate-file-name truename)) | |
1386 | (if find-file-visit-truename | |
1387 | (setq buffer-file-name buffer-file-truename)))) | |
a522e5bf RS |
1388 | (setq buffer-file-number |
1389 | (if filename | |
2a47b4f5 | 1390 | (nthcdr 10 (file-attributes buffer-file-name)) |
a522e5bf | 1391 | nil))) |
b4da00e9 RM |
1392 | ;; write-file-hooks is normally used for things like ftp-find-file |
1393 | ;; that visit things that are not local files as if they were files. | |
1394 | ;; Changing to visit an ordinary local file instead should flush the hook. | |
1395 | (kill-local-variable 'write-file-hooks) | |
c9dca4e0 | 1396 | (kill-local-variable 'local-write-file-hooks) |
b4da00e9 RM |
1397 | (kill-local-variable 'revert-buffer-function) |
1398 | (kill-local-variable 'backup-inhibited) | |
ee81c959 RS |
1399 | ;; If buffer was read-only because of version control, |
1400 | ;; that reason is gone now, so make it writable. | |
1401 | (if vc-mode | |
1402 | (setq buffer-read-only nil)) | |
1403 | (kill-local-variable 'vc-mode) | |
b4da00e9 RM |
1404 | ;; Turn off backup files for certain file names. |
1405 | ;; Since this is a permanent local, the major mode won't eliminate it. | |
1406 | (and (not (funcall backup-enable-predicate buffer-file-name)) | |
1407 | (progn | |
1408 | (make-local-variable 'backup-inhibited) | |
1409 | (setq backup-inhibited t))) | |
c77a81cf RS |
1410 | (let ((oauto buffer-auto-save-file-name)) |
1411 | ;; If auto-save was not already on, turn it on if appropriate. | |
1412 | (if (not buffer-auto-save-file-name) | |
1413 | (and buffer-file-name auto-save-default | |
1414 | (auto-save-mode t)) | |
1415 | ;; If auto save is on, start using a new name. | |
1416 | ;; We deliberately don't rename or delete the old auto save | |
1417 | ;; for the old visited file name. This is because perhaps | |
1418 | ;; the user wants to save the new state and then compare with the | |
1419 | ;; previous state from the auto save file. | |
1420 | (setq buffer-auto-save-file-name | |
1421 | (make-auto-save-file-name))) | |
1422 | ;; Rename the old auto save file if any. | |
1423 | (and oauto buffer-auto-save-file-name | |
e6f0e76c | 1424 | (file-exists-p oauto) |
c77a81cf | 1425 | (rename-file oauto buffer-auto-save-file-name t))) |
b4da00e9 RM |
1426 | (if buffer-file-name |
1427 | (set-buffer-modified-p t))) | |
1428 | ||
c2fb8488 | 1429 | (defun write-file (filename &optional confirm) |
b4da00e9 | 1430 | "Write current buffer into file FILENAME. |
41f48cb1 RS |
1431 | Makes buffer visit that file, and marks it not modified. |
1432 | If the buffer is already visiting a file, you can specify | |
1433 | a directory name as FILENAME, to write a file of the same | |
c2fb8488 RS |
1434 | old name in that directory. |
1435 | If optional second arg CONFIRM is non-nil, | |
1436 | ask for confirmation for overwriting an existing file." | |
b4da00e9 RM |
1437 | ;; (interactive "FWrite file: ") |
1438 | (interactive | |
1439 | (list (if buffer-file-name | |
1440 | (read-file-name "Write file: " | |
1441 | nil nil nil nil) | |
1442 | (read-file-name "Write file: " | |
1443 | (cdr (assq 'default-directory | |
1444 | (buffer-local-variables))) | |
c2fb8488 RS |
1445 | nil nil (buffer-name))) |
1446 | t)) | |
b4da00e9 | 1447 | (or (null filename) (string-equal filename "") |
41f48cb1 RS |
1448 | (progn |
1449 | ;; If arg is just a directory, | |
1450 | ;; use same file name, but in that directory. | |
1451 | (if (and (file-directory-p filename) buffer-file-name) | |
1452 | (setq filename (concat (file-name-as-directory filename) | |
1453 | (file-name-nondirectory buffer-file-name)))) | |
c2fb8488 RS |
1454 | (and confirm |
1455 | (file-exists-p filename) | |
1456 | (or (y-or-n-p (format "File `%s' exists; overwrite? " filename)) | |
1457 | (error "Canceled"))) | |
41f48cb1 | 1458 | (set-visited-file-name filename))) |
b4da00e9 RM |
1459 | (set-buffer-modified-p t) |
1460 | (save-buffer)) | |
1461 | \f | |
1462 | (defun backup-buffer () | |
1463 | "Make a backup of the disk file visited by the current buffer, if appropriate. | |
1464 | This is normally done before saving the buffer the first time. | |
1465 | If the value is non-nil, it is the result of `file-modes' on the original | |
1466 | file; this means that the caller, after saving the buffer, should change | |
1467 | the modes of the new file to agree with the old modes." | |
1468 | (if (and make-backup-files (not backup-inhibited) | |
1469 | (not buffer-backed-up) | |
1470 | (file-exists-p buffer-file-name) | |
1471 | (memq (aref (elt (file-attributes buffer-file-name) 8) 0) | |
1472 | '(?- ?l))) | |
1473 | (let ((real-file-name buffer-file-name) | |
1474 | backup-info backupname targets setmodes) | |
1475 | ;; If specified name is a symbolic link, chase it to the target. | |
1476 | ;; Thus we make the backups in the directory where the real file is. | |
5dadeb29 | 1477 | (setq real-file-name (file-chase-links real-file-name)) |
b4da00e9 RM |
1478 | (setq backup-info (find-backup-file-name real-file-name) |
1479 | backupname (car backup-info) | |
1480 | targets (cdr backup-info)) | |
1481 | ;;; (if (file-directory-p buffer-file-name) | |
1482 | ;;; (error "Cannot save buffer in directory %s" buffer-file-name)) | |
eb650569 RS |
1483 | (if backup-info |
1484 | (condition-case () | |
1485 | (let ((delete-old-versions | |
1486 | ;; If have old versions to maybe delete, | |
1487 | ;; ask the user to confirm now, before doing anything. | |
1488 | ;; But don't actually delete til later. | |
1489 | (and targets | |
1490 | (or (eq delete-old-versions t) (eq delete-old-versions nil)) | |
1491 | (or delete-old-versions | |
1492 | (y-or-n-p (format "Delete excess backup versions of %s? " | |
1493 | real-file-name)))))) | |
1494 | ;; Actually write the back up file. | |
1495 | (condition-case () | |
1496 | (if (or file-precious-flag | |
1497 | ; (file-symlink-p buffer-file-name) | |
1498 | backup-by-copying | |
1499 | (and backup-by-copying-when-linked | |
1500 | (> (file-nlinks real-file-name) 1)) | |
1501 | (and backup-by-copying-when-mismatch | |
1502 | (let ((attr (file-attributes real-file-name))) | |
1503 | (or (nth 9 attr) | |
1504 | (not (file-ownership-preserved-p real-file-name)))))) | |
1505 | (condition-case () | |
1506 | (copy-file real-file-name backupname t t) | |
1507 | (file-error | |
1508 | ;; If copying fails because file BACKUPNAME | |
1509 | ;; is not writable, delete that file and try again. | |
1510 | (if (and (file-exists-p backupname) | |
1511 | (not (file-writable-p backupname))) | |
1512 | (delete-file backupname)) | |
1513 | (copy-file real-file-name backupname t t))) | |
1514 | ;; rename-file should delete old backup. | |
1515 | (rename-file real-file-name backupname t) | |
1516 | (setq setmodes (file-modes backupname))) | |
1517 | (file-error | |
1518 | ;; If trouble writing the backup, write it in ~. | |
1519 | (setq backupname (expand-file-name "~/%backup%~")) | |
1520 | (message "Cannot write backup file; backing up in ~/%%backup%%~") | |
1521 | (sleep-for 1) | |
1522 | (condition-case () | |
1523 | (copy-file real-file-name backupname t t) | |
1524 | (file-error | |
1525 | ;; If copying fails because file BACKUPNAME | |
1526 | ;; is not writable, delete that file and try again. | |
1527 | (if (and (file-exists-p backupname) | |
1528 | (not (file-writable-p backupname))) | |
1529 | (delete-file backupname)) | |
1530 | (copy-file real-file-name backupname t t))))) | |
1531 | (setq buffer-backed-up t) | |
1532 | ;; Now delete the old versions, if desired. | |
1533 | (if delete-old-versions | |
1534 | (while targets | |
1535 | (condition-case () | |
1536 | (delete-file (car targets)) | |
1537 | (file-error nil)) | |
1538 | (setq targets (cdr targets)))) | |
1539 | setmodes) | |
1540 | (file-error nil)))))) | |
b4da00e9 | 1541 | |
c3554e95 | 1542 | (defun file-name-sans-versions (name &optional keep-backup-version) |
b4da00e9 RM |
1543 | "Return FILENAME sans backup versions or strings. |
1544 | This is a separate procedure so your site-init or startup file can | |
c3554e95 RS |
1545 | redefine it. |
1546 | If the optional argument KEEP-BACKUP-VERSION is non-nil, | |
1547 | we do not remove backup version numbers, only true file version numbers." | |
6eaebaa2 | 1548 | (let ((handler (find-file-name-handler name 'file-name-sans-versions))) |
c3554e95 RS |
1549 | (if handler |
1550 | (funcall handler 'file-name-sans-versions name keep-backup-version) | |
1551 | (substring name 0 | |
1552 | (if (eq system-type 'vax-vms) | |
1553 | ;; VMS version number is (a) semicolon, optional | |
1554 | ;; sign, zero or more digits or (b) period, option | |
1555 | ;; sign, zero or more digits, provided this is the | |
1556 | ;; second period encountered outside of the | |
1557 | ;; device/directory part of the file name. | |
26add1bf KH |
1558 | (or (string-match ";[-+]?[0-9]*\\'" name) |
1559 | (if (string-match "\\.[^]>:]*\\(\\.[-+]?[0-9]*\\)\\'" | |
c3554e95 RS |
1560 | name) |
1561 | (match-beginning 1)) | |
1562 | (length name)) | |
1563 | (if keep-backup-version | |
1564 | (length name) | |
dbb12f2c | 1565 | (or (string-match "\\.~[0-9.]+~\\'" name) |
c3554e95 RS |
1566 | (string-match "~\\'" name) |
1567 | (length name)))))))) | |
b4da00e9 | 1568 | |
cb0cd911 RS |
1569 | (defun file-ownership-preserved-p (file) |
1570 | "Returns t if deleting FILE and rewriting it would preserve the owner." | |
1571 | (let ((handler (find-file-name-handler file 'file-ownership-preserved-p))) | |
1572 | (if handler | |
1573 | (funcall handler 'file-ownership-preserved-p file) | |
ec5533be | 1574 | (let ((attributes (file-attributes file))) |
306faa42 RS |
1575 | ;; Return t if the file doesn't exist, since it's true that no |
1576 | ;; information would be lost by an (attempted) delete and create. | |
1577 | (or (null attributes) | |
1578 | (= (nth 2 attributes) (user-uid))))))) | |
cb0cd911 | 1579 | |
20b5d24c RS |
1580 | (defun file-name-sans-extension (filename) |
1581 | "Return FILENAME sans final \"extension\". | |
1582 | The extension, in a file name, is the part that follows the last `.'." | |
1583 | (save-match-data | |
1584 | (let ((file (file-name-sans-versions (file-name-nondirectory filename))) | |
1585 | directory) | |
1586 | (if (string-match "\\.[^.]*\\'" file) | |
1587 | (if (setq directory (file-name-directory filename)) | |
1588 | (expand-file-name (substring file 0 (match-beginning 0)) | |
1589 | directory) | |
1590 | (substring file 0 (match-beginning 0))) | |
1591 | filename)))) | |
1592 | ||
b4da00e9 RM |
1593 | (defun make-backup-file-name (file) |
1594 | "Create the non-numeric backup file name for FILE. | |
1595 | This is a separate function so you can redefine it for customization." | |
bb157910 RS |
1596 | (if (eq system-type 'ms-dos) |
1597 | (let ((fn (file-name-nondirectory file))) | |
1598 | (concat (file-name-directory file) | |
066327ae KH |
1599 | (or |
1600 | (and (string-match "\\`[^.]+\\'" fn) | |
1601 | (concat (match-string 0 fn) ".~")) | |
1602 | (and (string-match "\\`[^.]+\\.\\(..?\\)?" fn) | |
1603 | (concat (match-string 0 fn) "~"))))) | |
bb157910 | 1604 | (concat file "~"))) |
b4da00e9 RM |
1605 | |
1606 | (defun backup-file-name-p (file) | |
1607 | "Return non-nil if FILE is a backup file name (numeric or not). | |
1608 | This is a separate function so you can redefine it for customization. | |
1609 | You may need to redefine `file-name-sans-versions' as well." | |
066327ae | 1610 | (string-match "~\\'" file)) |
b4da00e9 | 1611 | |
2d051399 RS |
1612 | ;; This is used in various files. |
1613 | ;; The usage of bv-length is not very clean, | |
1614 | ;; but I can't see a good alternative, | |
1615 | ;; so as of now I am leaving it alone. | |
1616 | (defun backup-extract-version (fn) | |
1617 | "Given the name of a numeric backup file, return the backup number. | |
1618 | Uses the free variable `bv-length', whose value should be | |
1619 | the index in the name where the version number begins." | |
1620 | (if (and (string-match "[0-9]+~$" fn bv-length) | |
1621 | (= (match-beginning 0) bv-length)) | |
1622 | (string-to-int (substring fn bv-length -1)) | |
1623 | 0)) | |
1624 | ||
b4da00e9 RM |
1625 | ;; I believe there is no need to alter this behavior for VMS; |
1626 | ;; since backup files are not made on VMS, it should not get called. | |
1627 | (defun find-backup-file-name (fn) | |
1628 | "Find a file name for a backup file, and suggestions for deletions. | |
1629 | Value is a list whose car is the name for the backup file | |
eb650569 RS |
1630 | and whose cdr is a list of old versions to consider deleting now. |
1631 | If the value is nil, don't make a backup." | |
1632 | (let ((handler (find-file-name-handler fn 'find-backup-file-name))) | |
1633 | ;; Run a handler for this function so that ange-ftp can refuse to do it. | |
1634 | (if handler | |
1635 | (funcall handler 'find-backup-file-name fn) | |
1636 | (if (eq version-control 'never) | |
b4da00e9 | 1637 | (list (make-backup-file-name fn)) |
eb650569 RS |
1638 | (let* ((base-versions (concat (file-name-nondirectory fn) ".~")) |
1639 | (bv-length (length base-versions)) | |
1640 | possibilities | |
1641 | (versions nil) | |
1642 | (high-water-mark 0) | |
1643 | (deserve-versions-p nil) | |
1644 | (number-to-delete 0)) | |
1645 | (condition-case () | |
1646 | (setq possibilities (file-name-all-completions | |
1647 | base-versions | |
1648 | (file-name-directory fn)) | |
1649 | versions (sort (mapcar | |
1650 | (function backup-extract-version) | |
1651 | possibilities) | |
1652 | '<) | |
1653 | high-water-mark (apply 'max 0 versions) | |
1654 | deserve-versions-p (or version-control | |
1655 | (> high-water-mark 0)) | |
1656 | number-to-delete (- (length versions) | |
1657 | kept-old-versions kept-new-versions -1)) | |
1658 | (file-error | |
1659 | (setq possibilities nil))) | |
1660 | (if (not deserve-versions-p) | |
1661 | (list (make-backup-file-name fn)) | |
1662 | (cons (concat fn ".~" (int-to-string (1+ high-water-mark)) "~") | |
1663 | (if (and (> number-to-delete 0) | |
1664 | ;; Delete nothing if there is overflow | |
1665 | ;; in the number of versions to keep. | |
1666 | (>= (+ kept-new-versions kept-old-versions -1) 0)) | |
1667 | (mapcar (function (lambda (n) | |
1668 | (concat fn ".~" (int-to-string n) "~"))) | |
1669 | (let ((v (nthcdr kept-old-versions versions))) | |
1670 | (rplacd (nthcdr (1- number-to-delete) v) ()) | |
1671 | v)))))))))) | |
b4da00e9 | 1672 | |
b4da00e9 RM |
1673 | (defun file-nlinks (filename) |
1674 | "Return number of names file FILENAME has." | |
1675 | (car (cdr (file-attributes filename)))) | |
6c636af9 RM |
1676 | |
1677 | (defun file-relative-name (filename &optional directory) | |
1678 | "Convert FILENAME to be relative to DIRECTORY (default: default-directory)." | |
1679 | (setq filename (expand-file-name filename) | |
77fb6aed RS |
1680 | directory (file-name-as-directory (expand-file-name |
1681 | (or directory default-directory)))) | |
b1fa544f KH |
1682 | (let ((ancestor "")) |
1683 | (while (not (string-match (concat "^" (regexp-quote directory)) filename)) | |
1684 | (setq directory (file-name-directory (substring directory 0 -1)) | |
1685 | ancestor (concat "../" ancestor))) | |
1686 | (concat ancestor (substring filename (match-end 0))))) | |
b4da00e9 RM |
1687 | \f |
1688 | (defun save-buffer (&optional args) | |
1689 | "Save current buffer in visited file if modified. Versions described below. | |
1690 | By default, makes the previous version into a backup file | |
1691 | if previously requested or if this is the first save. | |
ac9650be | 1692 | With 1 \\[universal-argument], marks this version |
b4da00e9 | 1693 | to become a backup when the next save is done. |
ac9650be | 1694 | With 2 \\[universal-argument]'s, |
b4da00e9 | 1695 | unconditionally makes the previous version into a backup file. |
ac9650be RS |
1696 | With 3 \\[universal-argument]'s, marks this version |
1697 | to become a backup when the next save is done, | |
1698 | and unconditionally makes the previous version into a backup file. | |
1699 | ||
b4da00e9 RM |
1700 | With argument of 0, never makes the previous version into a backup file. |
1701 | ||
1702 | If a file's name is FOO, the names of its numbered backup versions are | |
1703 | FOO.~i~ for various integers i. A non-numbered backup file is called FOO~. | |
1704 | Numeric backups (rather than FOO~) will be made if value of | |
1705 | `version-control' is not the atom `never' and either there are already | |
1706 | numeric versions of the file being backed up, or `version-control' is | |
1707 | non-nil. | |
1708 | We don't want excessive versions piling up, so there are variables | |
1709 | `kept-old-versions', which tells Emacs how many oldest versions to keep, | |
1710 | and `kept-new-versions', which tells how many newest versions to keep. | |
1711 | Defaults are 2 old versions and 2 new. | |
1712 | `dired-kept-versions' controls dired's clean-directory (.) command. | |
de7d5e1b | 1713 | If `delete-old-versions' is nil, system will query user |
b4da00e9 RM |
1714 | before trimming versions. Otherwise it does it silently." |
1715 | (interactive "p") | |
1716 | (let ((modp (buffer-modified-p)) | |
1717 | (large (> (buffer-size) 50000)) | |
b5a8e0fc RS |
1718 | (make-backup-files (or (and make-backup-files (not (eq args 0))) |
1719 | (memq args '(16 64))))) | |
b4da00e9 RM |
1720 | (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) |
1721 | (if (and modp large) (message "Saving file %s..." (buffer-file-name))) | |
1722 | (basic-save-buffer) | |
1723 | (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) | |
1724 | ||
1725 | (defun delete-auto-save-file-if-necessary (&optional force) | |
1726 | "Delete auto-save file for current buffer if `delete-auto-save-files' is t. | |
1727 | Normally delete only if the file was written by this Emacs since | |
1728 | the last real save, but optional arg FORCE non-nil means delete anyway." | |
1729 | (and buffer-auto-save-file-name delete-auto-save-files | |
1730 | (not (string= buffer-file-name buffer-auto-save-file-name)) | |
1731 | (or force (recent-auto-save-p)) | |
1732 | (progn | |
1733 | (condition-case () | |
1734 | (delete-file buffer-auto-save-file-name) | |
1735 | (file-error nil)) | |
1736 | (set-buffer-auto-saved)))) | |
1737 | ||
1cc852cc RS |
1738 | (defvar after-save-hook nil |
1739 | "Normal hook that is run after a buffer is saved to its file.") | |
1740 | ||
b4da00e9 | 1741 | (defun basic-save-buffer () |
1cc852cc RS |
1742 | "Save the current buffer in its visited file, if it has been modified. |
1743 | After saving the buffer, run `after-save-hook'." | |
b4da00e9 | 1744 | (interactive) |
c11a94fe RS |
1745 | (save-excursion |
1746 | ;; In an indirect buffer, save its base buffer instead. | |
1747 | (if (buffer-base-buffer) | |
1748 | (set-buffer (buffer-base-buffer))) | |
1749 | (if (buffer-modified-p) | |
1750 | (let ((recent-save (recent-auto-save-p)) | |
1751 | setmodes tempsetmodes) | |
1752 | ;; On VMS, rename file and buffer to get rid of version number. | |
1753 | (if (and (eq system-type 'vax-vms) | |
1754 | (not (string= buffer-file-name | |
1755 | (file-name-sans-versions buffer-file-name)))) | |
1756 | (let (buffer-new-name) | |
1757 | ;; Strip VMS version number before save. | |
1758 | (setq buffer-file-name | |
1759 | (file-name-sans-versions buffer-file-name)) | |
1760 | ;; Construct a (unique) buffer name to correspond. | |
1761 | (let ((buf (create-file-buffer (downcase buffer-file-name)))) | |
1762 | (setq buffer-new-name (buffer-name buf)) | |
1763 | (kill-buffer buf)) | |
1764 | (rename-buffer buffer-new-name))) | |
1765 | ;; If buffer has no file name, ask user for one. | |
1766 | (or buffer-file-name | |
182891ef RS |
1767 | (let ((filename |
1768 | (expand-file-name | |
1769 | (read-file-name "File to save in: ") nil))) | |
1770 | (and (file-exists-p filename) | |
1771 | (or (y-or-n-p (format "File `%s' exists; overwrite? " | |
1772 | filename)) | |
1773 | (error "Canceled"))) | |
1774 | (set-visited-file-name filename))) | |
c11a94fe RS |
1775 | (or (verify-visited-file-modtime (current-buffer)) |
1776 | (not (file-exists-p buffer-file-name)) | |
1777 | (yes-or-no-p | |
1778 | (format "%s has changed since visited or saved. Save anyway? " | |
1779 | (file-name-nondirectory buffer-file-name))) | |
1780 | (error "Save not confirmed")) | |
1781 | (save-restriction | |
1782 | (widen) | |
1783 | (and (> (point-max) 1) | |
1784 | (/= (char-after (1- (point-max))) ?\n) | |
1785 | (not (and (eq selective-display t) | |
1786 | (= (char-after (1- (point-max))) ?\r))) | |
1787 | (or (eq require-final-newline t) | |
1788 | (and require-final-newline | |
1789 | (y-or-n-p | |
1790 | (format "Buffer %s does not end in newline. Add one? " | |
1791 | (buffer-name))))) | |
1792 | (save-excursion | |
1793 | (goto-char (point-max)) | |
1794 | (insert ?\n))) | |
1795 | (or (run-hook-with-args-until-success 'write-contents-hooks) | |
1796 | (run-hook-with-args-until-success 'local-write-file-hooks) | |
1797 | (run-hook-with-args-until-success 'write-file-hooks) | |
1798 | ;; If a hook returned t, file is already "written". | |
1799 | ;; Otherwise, write it the usual way now. | |
1800 | (setq setmodes (basic-save-buffer-1))) | |
2a47b4f5 RS |
1801 | (setq buffer-file-number |
1802 | (nthcdr 10 (file-attributes buffer-file-name))) | |
c11a94fe RS |
1803 | (if setmodes |
1804 | (condition-case () | |
1805 | (set-file-modes buffer-file-name setmodes) | |
1806 | (error nil)))) | |
1807 | ;; If the auto-save file was recent before this command, | |
1808 | ;; delete it now. | |
1809 | (delete-auto-save-file-if-necessary recent-save) | |
49530862 RS |
1810 | ;; Support VC `implicit' locking. |
1811 | (vc-after-save) | |
c11a94fe RS |
1812 | (run-hooks 'after-save-hook)) |
1813 | (message "(No changes need to be saved)")))) | |
b4da00e9 | 1814 | |
87d26afc RS |
1815 | ;; This does the "real job" of writing a buffer into its visited file |
1816 | ;; and making a backup file. This is what is normally done | |
1817 | ;; but inhibited if one of write-file-hooks returns non-nil. | |
1818 | ;; It returns a value to store in setmodes. | |
1819 | (defun basic-save-buffer-1 () | |
1820 | (let (tempsetmodes setmodes) | |
1821 | (if (not (file-writable-p buffer-file-name)) | |
1822 | (let ((dir (file-name-directory buffer-file-name))) | |
1823 | (if (not (file-directory-p dir)) | |
1824 | (error "%s is not a directory" dir) | |
1825 | (if (not (file-exists-p buffer-file-name)) | |
1826 | (error "Directory %s write-protected" dir) | |
1827 | (if (yes-or-no-p | |
1828 | (format "File %s is write-protected; try to save anyway? " | |
1829 | (file-name-nondirectory | |
1830 | buffer-file-name))) | |
1831 | (setq tempsetmodes t) | |
1832 | (error "Attempt to save to a file which you aren't allowed to write")))))) | |
1833 | (or buffer-backed-up | |
1834 | (setq setmodes (backup-buffer))) | |
f4a0f59b RS |
1835 | (let ((dir (file-name-directory buffer-file-name))) |
1836 | (if (and file-precious-flag | |
1837 | (file-writable-p dir)) | |
1838 | ;; If file is precious, write temp name, then rename it. | |
1839 | ;; This requires write access to the containing dir, | |
1840 | ;; which is why we don't try it if we don't have that access. | |
1841 | (let ((realname buffer-file-name) | |
6782610c RS |
1842 | tempname temp nogood i succeed |
1843 | (old-modtime (visited-file-modtime))) | |
f4a0f59b RS |
1844 | (setq i 0) |
1845 | (setq nogood t) | |
1846 | ;; Find the temporary name to write under. | |
1847 | (while nogood | |
1848 | (setq tempname (format "%s#tmp#%d" dir i)) | |
1849 | (setq nogood (file-exists-p tempname)) | |
1850 | (setq i (1+ i))) | |
1851 | (unwind-protect | |
1852 | (progn (clear-visited-file-modtime) | |
1853 | (write-region (point-min) (point-max) | |
89095962 RS |
1854 | tempname nil realname |
1855 | buffer-file-truename) | |
f4a0f59b RS |
1856 | (setq succeed t)) |
1857 | ;; If writing the temp file fails, | |
1858 | ;; delete the temp file. | |
6782610c RS |
1859 | (or succeed |
1860 | (progn | |
1861 | (delete-file tempname) | |
1862 | (set-visited-file-modtime old-modtime)))) | |
f4a0f59b RS |
1863 | ;; Since we have created an entirely new file |
1864 | ;; and renamed it, make sure it gets the | |
1865 | ;; right permission bits set. | |
1866 | (setq setmodes (file-modes buffer-file-name)) | |
1867 | ;; We succeeded in writing the temp file, | |
1868 | ;; so rename it. | |
1869 | (rename-file tempname buffer-file-name t)) | |
1870 | ;; If file not writable, see if we can make it writable | |
1871 | ;; temporarily while we write it. | |
1872 | ;; But no need to do so if we have just backed it up | |
1873 | ;; (setmodes is set) because that says we're superseding. | |
1874 | (cond ((and tempsetmodes (not setmodes)) | |
1875 | ;; Change the mode back, after writing. | |
1876 | (setq setmodes (file-modes buffer-file-name)) | |
1877 | (set-file-modes buffer-file-name 511))) | |
1878 | (write-region (point-min) (point-max) | |
89095962 | 1879 | buffer-file-name nil t buffer-file-truename))) |
87d26afc RS |
1880 | setmodes)) |
1881 | ||
b4da00e9 RM |
1882 | (defun save-some-buffers (&optional arg exiting) |
1883 | "Save some modified file-visiting buffers. Asks user about each one. | |
5bbbceb1 JB |
1884 | Optional argument (the prefix) non-nil means save all with no questions. |
1885 | Optional second argument EXITING means ask about certain non-file buffers | |
1886 | as well as about file buffers." | |
b4da00e9 | 1887 | (interactive "P") |
907482b9 | 1888 | (save-window-excursion |
5625c2fc RS |
1889 | (let ((files-done |
1890 | (map-y-or-n-p | |
1891 | (function | |
1892 | (lambda (buffer) | |
1893 | (and (buffer-modified-p buffer) | |
c11a94fe | 1894 | (not (buffer-base-buffer buffer)) |
5625c2fc RS |
1895 | (or |
1896 | (buffer-file-name buffer) | |
1897 | (and exiting | |
1898 | (progn | |
1899 | (set-buffer buffer) | |
1900 | (and buffer-offer-save (> (buffer-size) 0))))) | |
1901 | (if arg | |
1902 | t | |
1903 | (if (buffer-file-name buffer) | |
1904 | (format "Save file %s? " | |
1905 | (buffer-file-name buffer)) | |
1906 | (format "Save buffer %s? " | |
1907 | (buffer-name buffer))))))) | |
1908 | (function | |
1909 | (lambda (buffer) | |
1910 | (set-buffer buffer) | |
1911 | (save-buffer))) | |
1912 | (buffer-list) | |
1913 | '("buffer" "buffers" "save") | |
1914 | (list (list ?\C-r (lambda (buf) | |
1915 | (view-buffer buf) | |
1916 | (setq view-exit-action | |
1917 | '(lambda (ignore) | |
1918 | (exit-recursive-edit))) | |
1919 | (recursive-edit) | |
1920 | ;; Return nil to ask about BUF again. | |
1921 | nil) | |
1922 | "display the current buffer")))) | |
1923 | (abbrevs-done | |
1924 | (and save-abbrevs abbrevs-changed | |
1925 | (progn | |
1926 | (if (or arg | |
1927 | (y-or-n-p (format "Save abbrevs in %s? " abbrev-file-name))) | |
1928 | (write-abbrev-file nil)) | |
1929 | ;; Don't keep bothering user if he says no. | |
1930 | (setq abbrevs-changed nil) | |
1931 | t)))) | |
1932 | (or (> files-done 0) abbrevs-done | |
1933 | (message "(No files need saving)"))))) | |
b4da00e9 RM |
1934 | \f |
1935 | (defun not-modified (&optional arg) | |
1936 | "Mark current buffer as unmodified, not needing to be saved. | |
a641f9a1 RM |
1937 | With prefix arg, mark buffer as modified, so \\[save-buffer] will save. |
1938 | ||
1939 | It is not a good idea to use this function in Lisp programs, because it | |
1940 | prints a message in the minibuffer. Instead, use `set-buffer-modified-p'." | |
b4da00e9 RM |
1941 | (interactive "P") |
1942 | (message (if arg "Modification-flag set" | |
1943 | "Modification-flag cleared")) | |
1944 | (set-buffer-modified-p arg)) | |
1945 | ||
1946 | (defun toggle-read-only (&optional arg) | |
1947 | "Change whether this buffer is visiting its file read-only. | |
1948 | With arg, set read-only iff arg is positive." | |
1949 | (interactive "P") | |
1950 | (setq buffer-read-only | |
1951 | (if (null arg) | |
1952 | (not buffer-read-only) | |
1953 | (> (prefix-numeric-value arg) 0))) | |
3941fe2c | 1954 | (force-mode-line-update)) |
b4da00e9 RM |
1955 | |
1956 | (defun insert-file (filename) | |
1957 | "Insert contents of file FILENAME into buffer after point. | |
1958 | Set mark after the inserted text. | |
1959 | ||
1960 | This function is meant for the user to run interactively. | |
1961 | Don't call it from programs! Use `insert-file-contents' instead. | |
1962 | \(Its calling sequence is different; see its documentation)." | |
6f931919 | 1963 | (interactive "*fInsert file: ") |
3be6243a RS |
1964 | (if (file-directory-p filename) |
1965 | (signal 'file-error (list "Opening input file" "file is a directory" | |
1966 | filename))) | |
b4da00e9 RM |
1967 | (let ((tem (insert-file-contents filename))) |
1968 | (push-mark (+ (point) (car (cdr tem)))))) | |
1969 | ||
1970 | (defun append-to-file (start end filename) | |
1971 | "Append the contents of the region to the end of file FILENAME. | |
1972 | When called from a function, expects three arguments, | |
1973 | START, END and FILENAME. START and END are buffer positions | |
1974 | saying what text to write." | |
1975 | (interactive "r\nFAppend to file: ") | |
1976 | (write-region start end filename t)) | |
1977 | ||
1978 | (defun file-newest-backup (filename) | |
1979 | "Return most recent backup file for FILENAME or nil if no backups exist." | |
1980 | (let* ((filename (expand-file-name filename)) | |
1981 | (file (file-name-nondirectory filename)) | |
1982 | (dir (file-name-directory filename)) | |
1983 | (comp (file-name-all-completions file dir)) | |
1984 | newest) | |
1985 | (while comp | |
1986 | (setq file (concat dir (car comp)) | |
1987 | comp (cdr comp)) | |
1988 | (if (and (backup-file-name-p file) | |
1989 | (or (null newest) (file-newer-than-file-p file newest))) | |
1990 | (setq newest file))) | |
1991 | newest)) | |
1992 | ||
1993 | (defun rename-uniquely () | |
1994 | "Rename current buffer to a similar name not already taken. | |
1995 | This function is useful for creating multiple shell process buffers | |
1996 | or multiple mail buffers, etc." | |
1997 | (interactive) | |
40eb8038 | 1998 | (save-match-data |
ed34f320 RS |
1999 | (let* ((base-name (if (and (string-match "<[0-9]+>\\'" (buffer-name)) |
2000 | (not (and buffer-file-name | |
2001 | (string= (buffer-name) | |
2002 | (file-name-nondirectory | |
2003 | buffer-file-name))))) | |
2004 | ;; If the existing buffer name has a <NNN>, | |
2005 | ;; which isn't part of the file name (if any), | |
2006 | ;; then get rid of that. | |
40eb8038 RS |
2007 | (substring (buffer-name) 0 (match-beginning 0)) |
2008 | (buffer-name))) | |
2009 | (new-buf (generate-new-buffer base-name)) | |
2010 | (name (buffer-name new-buf))) | |
2011 | (kill-buffer new-buf) | |
2012 | (rename-buffer name) | |
3941fe2c | 2013 | (force-mode-line-update)))) |
5bbbceb1 | 2014 | |
4e43240a | 2015 | (defun make-directory (dir &optional parents) |
5ce8bb89 RS |
2016 | "Create the directory DIR and any nonexistent parent dirs. |
2017 | Interactively, the default choice of directory to create | |
2018 | is the current default directory for file names. | |
2019 | That is useful when you have visited a file in a nonexistint directory. | |
2020 | ||
2021 | Noninteractively, the second (optional) argument PARENTS says whether | |
2022 | to create parent directories if they don't exist." | |
2023 | (interactive | |
2024 | (list (read-file-name "Make directory: " default-directory default-directory | |
2025 | nil nil) | |
2026 | t)) | |
6eaebaa2 | 2027 | (let ((handler (find-file-name-handler dir 'make-directory))) |
4e43240a RS |
2028 | (if handler |
2029 | (funcall handler 'make-directory dir parents) | |
2030 | (if (not parents) | |
2031 | (make-directory-internal dir) | |
2032 | (let ((dir (directory-file-name (expand-file-name dir))) | |
2033 | create-list) | |
2034 | (while (not (file-exists-p dir)) | |
2035 | (setq create-list (cons dir create-list) | |
2036 | dir (directory-file-name (file-name-directory dir)))) | |
2037 | (while create-list | |
2038 | (make-directory-internal (car create-list)) | |
2039 | (setq create-list (cdr create-list)))))))) | |
b4da00e9 RM |
2040 | \f |
2041 | (put 'revert-buffer-function 'permanent-local t) | |
2042 | (defvar revert-buffer-function nil | |
0973d78b RS |
2043 | "Function to use to revert this buffer, or nil to do the default. |
2044 | The function receives two arguments IGNORE-AUTO and NOCONFIRM, | |
2045 | which are the arguments that `revert-buffer' received.") | |
b4da00e9 RM |
2046 | |
2047 | (put 'revert-buffer-insert-file-contents-function 'permanent-local t) | |
2048 | (defvar revert-buffer-insert-file-contents-function nil | |
2049 | "Function to use to insert contents when reverting this buffer. | |
2050 | Gets two args, first the nominal file name to use, | |
2051 | and second, t if reading the auto-save file.") | |
2052 | ||
5f76e7d4 KH |
2053 | (defvar before-revert-hook nil |
2054 | "Normal hook for `revert-buffer' to run before reverting. | |
2055 | If `revert-buffer-function' is used to override the normal revert | |
2056 | mechanism, this hook is not used.") | |
2057 | ||
2058 | (defvar after-revert-hook nil | |
2059 | "Normal hook for `revert-buffer' to run after reverting. | |
2060 | Note that the hook value that it runs is the value that was in effect | |
2061 | before reverting; that makes a difference if you have buffer-local | |
2062 | hook functions. | |
2063 | ||
2064 | If `revert-buffer-function' is used to override the normal revert | |
2065 | mechanism, this hook is not used.") | |
2066 | ||
1ab31687 | 2067 | (defun revert-buffer (&optional ignore-auto noconfirm) |
b4da00e9 RM |
2068 | "Replace the buffer text with the text of the visited file on disk. |
2069 | This undoes all changes since the file was visited or saved. | |
8c0e7b73 JB |
2070 | With a prefix argument, offer to revert from latest auto-save file, if |
2071 | that is more recent than the visited file. | |
1ab31687 | 2072 | |
65ee6096 | 2073 | When called from Lisp, the first argument is IGNORE-AUTO; only offer |
1ab31687 JB |
2074 | to revert from the auto-save file when this is nil. Note that the |
2075 | sense of this argument is the reverse of the prefix argument, for the | |
2076 | sake of backward compatibility. IGNORE-AUTO is optional, defaulting | |
2077 | to nil. | |
2078 | ||
2079 | Optional second argument NOCONFIRM means don't ask for confirmation at | |
2080 | all. | |
b4da00e9 | 2081 | |
8c0e7b73 | 2082 | If the value of `revert-buffer-function' is non-nil, it is called to |
fb6208a6 RS |
2083 | do the work. |
2084 | ||
4fbf62ee KH |
2085 | The default revert function runs the hook `before-revert-hook' at the |
2086 | beginning and `after-revert-hook' at the end." | |
1ab31687 JB |
2087 | ;; I admit it's odd to reverse the sense of the prefix argument, but |
2088 | ;; there is a lot of code out there which assumes that the first | |
2089 | ;; argument should be t to avoid consulting the auto-save file, and | |
2090 | ;; there's no straightforward way to encourage authors to notice a | |
2091 | ;; reversal of the argument sense. So I'm just changing the user | |
2092 | ;; interface, but leaving the programmatic interface the same. | |
e0867e99 | 2093 | (interactive (list (not current-prefix-arg))) |
b4da00e9 | 2094 | (if revert-buffer-function |
1ab31687 | 2095 | (funcall revert-buffer-function ignore-auto noconfirm) |
b4da00e9 | 2096 | (let* ((opoint (point)) |
1ab31687 JB |
2097 | (auto-save-p (and (not ignore-auto) |
2098 | (recent-auto-save-p) | |
b4da00e9 RM |
2099 | buffer-auto-save-file-name |
2100 | (file-readable-p buffer-auto-save-file-name) | |
2101 | (y-or-n-p | |
2102 | "Buffer has been auto-saved recently. Revert from auto-save file? "))) | |
2103 | (file-name (if auto-save-p | |
2104 | buffer-auto-save-file-name | |
2105 | buffer-file-name))) | |
2106 | (cond ((null file-name) | |
2107 | (error "Buffer does not seem to be associated with any file")) | |
2108 | ((or noconfirm | |
2109 | (yes-or-no-p (format "Revert buffer from file %s? " | |
2110 | file-name))) | |
4fbf62ee | 2111 | (run-hooks 'before-revert-hook) |
b4da00e9 RM |
2112 | ;; If file was backed up but has changed since, |
2113 | ;; we shd make another backup. | |
2114 | (and (not auto-save-p) | |
5bbbceb1 | 2115 | (not (verify-visited-file-modtime (current-buffer))) |
b4da00e9 RM |
2116 | (setq buffer-backed-up nil)) |
2117 | ;; Get rid of all undo records for this buffer. | |
2118 | (or (eq buffer-undo-list t) | |
2119 | (setq buffer-undo-list nil)) | |
ba5c8c93 KH |
2120 | ;; Effectively copy the after-revert-hook status, |
2121 | ;; since after-find-file will clobber it. | |
2122 | (let ((global-hook (default-value 'after-revert-hook)) | |
2123 | (local-hook-p (local-variable-p 'after-revert-hook)) | |
2124 | (local-hook (and (local-variable-p 'after-revert-hook) | |
2125 | after-revert-hook))) | |
2126 | (let (buffer-read-only | |
2127 | ;; Don't make undo records for the reversion. | |
2128 | (buffer-undo-list t)) | |
2129 | (if revert-buffer-insert-file-contents-function | |
2130 | (funcall revert-buffer-insert-file-contents-function | |
2131 | file-name auto-save-p) | |
2132 | (if (not (file-exists-p file-name)) | |
2133 | (error "File %s no longer exists!" file-name)) | |
2134 | ;; Bind buffer-file-name to nil | |
2135 | ;; so that we don't try to lock the file. | |
2136 | (let ((buffer-file-name nil)) | |
2137 | (or auto-save-p | |
2138 | (unlock-buffer))) | |
2139 | (widen) | |
2140 | (insert-file-contents file-name (not auto-save-p) | |
2141 | nil nil t))) | |
2142 | (goto-char (min opoint (point-max))) | |
2143 | ;; Recompute the truename in case changes in symlinks | |
2144 | ;; have changed the truename. | |
2145 | (setq buffer-file-truename | |
2146 | (abbreviate-file-name (file-truename buffer-file-name))) | |
2147 | (after-find-file nil nil t t) | |
2148 | ;; Run after-revert-hook as it was before we reverted. | |
2149 | (setq-default revert-buffer-internal-hook global-hook) | |
2150 | (if local-hook-p | |
2151 | (progn | |
2152 | (make-local-variable 'revert-buffer-internal-hook) | |
2153 | (setq revert-buffer-internal-hook local-hook)) | |
2154 | (kill-local-variable 'revert-buffer-internal-hook)) | |
2155 | (run-hooks 'revert-buffer-internal-hook)) | |
4fbf62ee | 2156 | t))))) |
b4da00e9 RM |
2157 | |
2158 | (defun recover-file (file) | |
2159 | "Visit file FILE, but get contents from its last auto-save file." | |
10f7c7fc RS |
2160 | ;; Actually putting the file name in the minibuffer should be used |
2161 | ;; only rarely. | |
2162 | ;; Not just because users often use the default. | |
e1dadc17 | 2163 | (interactive "FRecover file: ") |
b4da00e9 | 2164 | (setq file (expand-file-name file)) |
f7da6740 RS |
2165 | (if (auto-save-file-name-p (file-name-nondirectory file)) |
2166 | (error "%s is an auto-save file" file)) | |
b4da00e9 RM |
2167 | (let ((file-name (let ((buffer-file-name file)) |
2168 | (make-auto-save-file-name)))) | |
945e1965 RS |
2169 | (cond ((if (file-exists-p file) |
2170 | (not (file-newer-than-file-p file-name file)) | |
2171 | (not (file-exists-p file-name))) | |
b4da00e9 RM |
2172 | (error "Auto-save file %s not current" file-name)) |
2173 | ((save-window-excursion | |
2174 | (if (not (eq system-type 'vax-vms)) | |
2175 | (with-output-to-temp-buffer "*Directory*" | |
2176 | (buffer-disable-undo standard-output) | |
2177 | (call-process "ls" nil standard-output nil | |
2dc2b736 RS |
2178 | (if (file-symlink-p file) "-lL" "-l") |
2179 | file file-name))) | |
b4da00e9 RM |
2180 | (yes-or-no-p (format "Recover auto save file %s? " file-name))) |
2181 | (switch-to-buffer (find-file-noselect file t)) | |
2182 | (let ((buffer-read-only nil)) | |
2183 | (erase-buffer) | |
2184 | (insert-file-contents file-name nil)) | |
8cfb9d46 | 2185 | (after-find-file nil nil t)) |
b4da00e9 RM |
2186 | (t (error "Recover-file cancelled."))))) |
2187 | ||
6598027d | 2188 | (defun recover-session () |
9aee5392 RS |
2189 | "Recover auto save files from a previous Emacs session. |
2190 | This command first displays a Dired buffer showing you the | |
2191 | previous sessions that you could recover from. | |
2192 | To choose one, move point to the proper line and then type C-c C-c. | |
2193 | Then you'll be asked about a number of files to recover." | |
2194 | (interactive) | |
5bcb0278 | 2195 | (dired (concat auto-save-list-file-prefix "*")) |
9aee5392 RS |
2196 | (goto-char (point-min)) |
2197 | (or (looking-at "Move to the session you want to recover,") | |
2198 | (let ((inhibit-read-only t)) | |
033ef863 RS |
2199 | (insert "Move to the session you want to recover,\n" |
2200 | "then type C-c C-c to select it.\n\n" | |
2201 | "You can also delete some of these files;\n" | |
2202 | "type d on a line to mark that file for deletion.\n\n"))) | |
9aee5392 | 2203 | (use-local-map (nconc (make-sparse-keymap) (current-local-map))) |
80280bb7 | 2204 | (define-key (current-local-map) "\C-c\C-c" 'recover-session-finish)) |
9aee5392 | 2205 | |
80280bb7 | 2206 | (defun recover-session-finish () |
9aee5392 RS |
2207 | "Choose one saved session to recover auto-save files from. |
2208 | This command is used in the special Dired buffer created by | |
80280bb7 | 2209 | \\[recover-session]." |
9aee5392 RS |
2210 | (interactive) |
2211 | ;; Get the name of the session file to recover from. | |
2212 | (let ((file (dired-get-filename)) | |
953a03b2 | 2213 | files |
9aee5392 | 2214 | (buffer (get-buffer-create " *recover*"))) |
033ef863 | 2215 | (dired-do-flagged-delete t) |
9aee5392 RS |
2216 | (unwind-protect |
2217 | (save-excursion | |
2218 | ;; Read in the auto-save-list file. | |
2219 | (set-buffer buffer) | |
2220 | (erase-buffer) | |
2221 | (insert-file-contents file) | |
953a03b2 RS |
2222 | ;; Loop thru the text of that file |
2223 | ;; and get out the names of the files to recover. | |
2224 | (while (not (eobp)) | |
2225 | (let (thisfile autofile) | |
2226 | (if (eolp) | |
2227 | ;; This is a pair of lines for a non-file-visiting buffer. | |
2228 | ;; Get the auto-save file name and manufacture | |
2229 | ;; a "visited file name" from that. | |
2230 | (progn | |
2231 | (forward-line 1) | |
2232 | (setq autofile | |
2233 | (buffer-substring-no-properties | |
2234 | (point) | |
2235 | (save-excursion | |
2236 | (end-of-line) | |
2237 | (point)))) | |
2238 | (setq thisfile | |
2239 | (expand-file-name | |
2240 | (substring | |
2241 | (file-name-nondirectory autofile) | |
2242 | 1 -1) | |
2243 | (file-name-directory autofile))) | |
2244 | (forward-line 1)) | |
2245 | ;; This pair of lines is a file-visiting | |
2246 | ;; buffer. Use the visited file name. | |
2247 | (progn | |
2248 | (setq thisfile | |
2249 | (buffer-substring-no-properties | |
2250 | (point) (progn (end-of-line) (point)))) | |
2251 | (forward-line 1) | |
2252 | (setq autofile | |
2253 | (buffer-substring-no-properties | |
2254 | (point) (progn (end-of-line) (point)))) | |
2255 | (forward-line 1))) | |
2256 | ;; Ignore a file if its auto-save file does not exist now. | |
2257 | (if (file-exists-p autofile) | |
2258 | (setq files (cons thisfile files))))) | |
2259 | (setq files (nreverse files)) | |
945e1965 RS |
2260 | ;; The file contains a pair of line for each auto-saved buffer. |
2261 | ;; The first line of the pair contains the visited file name | |
2262 | ;; or is empty if the buffer was not visiting a file. | |
2263 | ;; The second line is the auto-save file name. | |
953a03b2 RS |
2264 | (if files |
2265 | (map-y-or-n-p "Recover %s? " | |
2266 | (lambda (file) | |
2267 | (condition-case nil | |
2268 | (save-excursion (recover-file file)) | |
2269 | (error | |
2270 | "Failed to recover `%s'" file))) | |
2271 | files | |
2272 | '("file" "files" "recover")) | |
2273 | (message "No files can be recovered from this session now"))) | |
9aee5392 RS |
2274 | (kill-buffer buffer)))) |
2275 | ||
b4da00e9 RM |
2276 | (defun kill-some-buffers () |
2277 | "For each buffer, ask whether to kill it." | |
2278 | (interactive) | |
2279 | (let ((list (buffer-list))) | |
2280 | (while list | |
2281 | (let* ((buffer (car list)) | |
2282 | (name (buffer-name buffer))) | |
2283 | (and (not (string-equal name "")) | |
2284 | (/= (aref name 0) ? ) | |
2285 | (yes-or-no-p | |
2286 | (format "Buffer %s %s. Kill? " | |
2287 | name | |
2288 | (if (buffer-modified-p buffer) | |
2289 | "HAS BEEN EDITED" "is unmodified"))) | |
2290 | (kill-buffer buffer))) | |
2291 | (setq list (cdr list))))) | |
2292 | \f | |
2293 | (defun auto-save-mode (arg) | |
2294 | "Toggle auto-saving of contents of current buffer. | |
f3e23606 | 2295 | With prefix argument ARG, turn auto-saving on if positive, else off." |
b4da00e9 RM |
2296 | (interactive "P") |
2297 | (setq buffer-auto-save-file-name | |
2298 | (and (if (null arg) | |
74b9c2af RS |
2299 | (or (not buffer-auto-save-file-name) |
2300 | ;; If autosave is off because buffer has shrunk, | |
2301 | ;; then toggling should turn it on. | |
2302 | (< buffer-saved-size 0)) | |
b4da00e9 RM |
2303 | (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) |
2304 | (if (and buffer-file-name auto-save-visited-file-name | |
2305 | (not buffer-read-only)) | |
2306 | buffer-file-name | |
2307 | (make-auto-save-file-name)))) | |
0b7f1ef2 RS |
2308 | ;; If -1 was stored here, to temporarily turn off saving, |
2309 | ;; turn it back on. | |
2310 | (and (< buffer-saved-size 0) | |
2311 | (setq buffer-saved-size 0)) | |
b4da00e9 RM |
2312 | (if (interactive-p) |
2313 | (message "Auto-save %s (in this buffer)" | |
2314 | (if buffer-auto-save-file-name "on" "off"))) | |
2315 | buffer-auto-save-file-name) | |
2316 | ||
2317 | (defun rename-auto-save-file () | |
2318 | "Adjust current buffer's auto save file name for current conditions. | |
2319 | Also rename any existing auto save file, if it was made in this session." | |
2320 | (let ((osave buffer-auto-save-file-name)) | |
2321 | (setq buffer-auto-save-file-name | |
2322 | (make-auto-save-file-name)) | |
2323 | (if (and osave buffer-auto-save-file-name | |
2324 | (not (string= buffer-auto-save-file-name buffer-file-name)) | |
2325 | (not (string= buffer-auto-save-file-name osave)) | |
2326 | (file-exists-p osave) | |
2327 | (recent-auto-save-p)) | |
2328 | (rename-file osave buffer-auto-save-file-name t)))) | |
2329 | ||
2330 | (defun make-auto-save-file-name () | |
2331 | "Return file name to use for auto-saves of current buffer. | |
2332 | Does not consider `auto-save-visited-file-name' as that variable is checked | |
2333 | before calling this function. You can redefine this for customization. | |
2334 | See also `auto-save-file-name-p'." | |
2335 | (if buffer-file-name | |
2336 | (concat (file-name-directory buffer-file-name) | |
2337 | "#" | |
2338 | (file-name-nondirectory buffer-file-name) | |
2339 | "#") | |
0a1763b4 RS |
2340 | |
2341 | ;; Deal with buffers that don't have any associated files. (Mail | |
2342 | ;; mode tends to create a good number of these.) | |
2343 | ||
7d483e8c | 2344 | (let ((buffer-name (buffer-name)) |
0a1763b4 RS |
2345 | (limit 0)) |
2346 | ;; Use technique from Sebastian Kremer's auto-save | |
2347 | ;; package to turn slashes into \\!. This ensures that | |
2348 | ;; the auto-save buffer name is unique. | |
2349 | ||
2350 | (while (string-match "[/\\]" buffer-name limit) | |
2351 | (setq buffer-name (concat (substring buffer-name 0 (match-beginning 0)) | |
2352 | (if (string= (substring buffer-name | |
2353 | (match-beginning 0) | |
2354 | (match-end 0)) | |
2355 | "/") | |
2356 | "\\!" | |
2357 | "\\\\") | |
2358 | (substring buffer-name (match-end 0)))) | |
2359 | (setq limit (1+ (match-end 0)))) | |
2360 | ||
7d483e8c | 2361 | (expand-file-name (format "#%s#%s#" buffer-name (make-temp-name "")))))) |
b4da00e9 RM |
2362 | |
2363 | (defun auto-save-file-name-p (filename) | |
2364 | "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'. | |
2365 | FILENAME should lack slashes. You can redefine this for customization." | |
2366 | (string-match "^#.*#$" filename)) | |
2367 | \f | |
2368 | (defconst list-directory-brief-switches | |
2369 | (if (eq system-type 'vax-vms) "" "-CF") | |
2370 | "*Switches for list-directory to pass to `ls' for brief listing,") | |
2371 | ||
2372 | (defconst list-directory-verbose-switches | |
2373 | (if (eq system-type 'vax-vms) | |
2374 | "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)" | |
2375 | "-l") | |
2376 | "*Switches for list-directory to pass to `ls' for verbose listing,") | |
2377 | ||
2378 | (defun list-directory (dirname &optional verbose) | |
2379 | "Display a list of files in or matching DIRNAME, a la `ls'. | |
2380 | DIRNAME is globbed by the shell if necessary. | |
2381 | Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. | |
2382 | Actions controlled by variables `list-directory-brief-switches' | |
2383 | and `list-directory-verbose-switches'." | |
2384 | (interactive (let ((pfx current-prefix-arg)) | |
2385 | (list (read-file-name (if pfx "List directory (verbose): " | |
2386 | "List directory (brief): ") | |
2387 | nil default-directory nil) | |
2388 | pfx))) | |
2389 | (let ((switches (if verbose list-directory-verbose-switches | |
2390 | list-directory-brief-switches))) | |
2391 | (or dirname (setq dirname default-directory)) | |
2392 | (setq dirname (expand-file-name dirname)) | |
2393 | (with-output-to-temp-buffer "*Directory*" | |
2394 | (buffer-disable-undo standard-output) | |
2395 | (princ "Directory ") | |
2396 | (princ dirname) | |
2397 | (terpri) | |
c3554e95 RS |
2398 | (save-excursion |
2399 | (set-buffer "*Directory*") | |
a513a2f8 | 2400 | (setq default-directory (file-name-directory dirname)) |
c3554e95 RS |
2401 | (let ((wildcard (not (file-directory-p dirname)))) |
2402 | (insert-directory dirname switches wildcard (not wildcard))))))) | |
2403 | ||
2404 | (defvar insert-directory-program "ls" | |
2405 | "Absolute or relative name of the `ls' program used by `insert-directory'.") | |
2406 | ||
2407 | ;; insert-directory | |
2408 | ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and | |
2409 | ;; FULL-DIRECTORY-P is nil. | |
2410 | ;; The single line of output must display FILE's name as it was | |
2411 | ;; given, namely, an absolute path name. | |
2412 | ;; - must insert exactly one line for each file if WILDCARD or | |
2413 | ;; FULL-DIRECTORY-P is t, plus one optional "total" line | |
2414 | ;; before the file lines, plus optional text after the file lines. | |
2415 | ;; Lines are delimited by "\n", so filenames containing "\n" are not | |
2416 | ;; allowed. | |
2417 | ;; File lines should display the basename. | |
2418 | ;; - must be consistent with | |
2419 | ;; - functions dired-move-to-filename, (these two define what a file line is) | |
2420 | ;; dired-move-to-end-of-filename, | |
2421 | ;; dired-between-files, (shortcut for (not (dired-move-to-filename))) | |
2422 | ;; dired-insert-headerline | |
2423 | ;; dired-after-subdir-garbage (defines what a "total" line is) | |
2424 | ;; - variable dired-subdir-regexp | |
2425 | (defun insert-directory (file switches &optional wildcard full-directory-p) | |
a18b7c81 | 2426 | "Insert directory listing for FILE, formatted according to SWITCHES. |
c3554e95 | 2427 | Leaves point after the inserted text. |
727d277d | 2428 | SWITCHES may be a string of options, or a list of strings. |
c3554e95 RS |
2429 | Optional third arg WILDCARD means treat FILE as shell wildcard. |
2430 | Optional fourth arg FULL-DIRECTORY-P means file is a directory and | |
2431 | switches do not contain `d', so that a full listing is expected. | |
2432 | ||
2433 | This works by running a directory listing program | |
406e12d9 | 2434 | whose name is in the variable `insert-directory-program'. |
c3554e95 | 2435 | If WILDCARD, it also runs the shell specified by `shell-file-name'." |
c870ab8e RS |
2436 | ;; We need the directory in order to find the right handler. |
2437 | (let ((handler (find-file-name-handler (expand-file-name file) | |
2438 | 'insert-directory))) | |
c3554e95 RS |
2439 | (if handler |
2440 | (funcall handler 'insert-directory file switches | |
2441 | wildcard full-directory-p) | |
b4da00e9 | 2442 | (if (eq system-type 'vax-vms) |
c3554e95 RS |
2443 | (vms-read-directory file switches (current-buffer)) |
2444 | (if wildcard | |
a9fa0bd5 RS |
2445 | ;; Run ls in the directory of the file pattern we asked for. |
2446 | (let ((default-directory | |
2447 | (if (file-name-absolute-p file) | |
2448 | (file-name-directory file) | |
6e2dc7cb RS |
2449 | (file-name-directory (expand-file-name file)))) |
2450 | (pattern (file-name-nondirectory file)) | |
2451 | (beg 0)) | |
2452 | ;; Quote some characters that have special meanings in shells; | |
2453 | ;; but don't quote the wildcards--we want them to be special. | |
2454 | ;; We also currently don't quote the quoting characters | |
2455 | ;; in case people want to use them explicitly to quote | |
2456 | ;; wildcard characters. | |
d1739e52 | 2457 | (while (string-match "[ \t\n;<>&|()#$]" pattern beg) |
6e2dc7cb RS |
2458 | (setq pattern |
2459 | (concat (substring pattern 0 (match-beginning 0)) | |
2460 | "\\" | |
2461 | (substring pattern (match-beginning 0))) | |
2462 | beg (1+ (match-end 0)))) | |
c3554e95 | 2463 | (call-process shell-file-name nil t nil |
108aa1b5 RS |
2464 | "-c" (concat "\\" ;; Disregard shell aliases! |
2465 | insert-directory-program | |
727d277d RS |
2466 | " -d " |
2467 | (if (stringp switches) | |
2468 | switches | |
eb51e665 | 2469 | (mapconcat 'identity switches " ")) |
727d277d | 2470 | " " |
eb51e665 | 2471 | pattern))) |
a18b7c81 JB |
2472 | ;; SunOS 4.1.3, SVr4 and others need the "." to list the |
2473 | ;; directory if FILE is a symbolic link. | |
727d277d RS |
2474 | (apply 'call-process |
2475 | insert-directory-program nil t nil | |
2476 | (let (list) | |
9700caaf | 2477 | (if (listp switches) |
727d277d | 2478 | (setq list switches) |
9700caaf RS |
2479 | (if (not (equal switches "")) |
2480 | (progn | |
2481 | ;; Split the switches at any spaces | |
2482 | ;; so we can pass separate options as separate args. | |
2483 | (while (string-match " " switches) | |
2484 | (setq list (cons (substring switches 0 (match-beginning 0)) | |
2485 | list) | |
2486 | switches (substring switches (match-end 0)))) | |
2487 | (setq list (cons switches list))))) | |
727d277d RS |
2488 | (append list |
2489 | (list | |
2490 | (if full-directory-p | |
2491 | (concat (file-name-as-directory file) ".") | |
2492 | file)))))))))) | |
b4da00e9 | 2493 | |
88902b35 | 2494 | (defvar kill-emacs-query-functions nil |
65d5c6de | 2495 | "Functions to call with no arguments to query about killing Emacs. |
78c793d1 RS |
2496 | If any of these functions returns nil, killing Emacs is cancelled. |
2497 | `save-buffers-kill-emacs' (\\[save-buffers-kill-emacs]) calls these functions, | |
2498 | but `kill-emacs', the low level primitive, does not. | |
2499 | See also `kill-emacs-hook'.") | |
88902b35 | 2500 | |
b4da00e9 RM |
2501 | (defun save-buffers-kill-emacs (&optional arg) |
2502 | "Offer to save each buffer, then kill this Emacs process. | |
2503 | With prefix arg, silently save all file-visiting buffers, then kill." | |
2504 | (interactive "P") | |
2505 | (save-some-buffers arg t) | |
2506 | (and (or (not (memq t (mapcar (function | |
2507 | (lambda (buf) (and (buffer-file-name buf) | |
2508 | (buffer-modified-p buf)))) | |
2509 | (buffer-list)))) | |
2510 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) | |
2511 | (or (not (fboundp 'process-list)) | |
2512 | ;; process-list is not defined on VMS. | |
2513 | (let ((processes (process-list)) | |
2514 | active) | |
2515 | (while processes | |
528415e7 | 2516 | (and (memq (process-status (car processes)) '(run stop open)) |
b4da00e9 RM |
2517 | (let ((val (process-kill-without-query (car processes)))) |
2518 | (process-kill-without-query (car processes) val) | |
2519 | val) | |
2520 | (setq active t)) | |
2521 | (setq processes (cdr processes))) | |
2522 | (or (not active) | |
2523 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) | |
88902b35 | 2524 | ;; Query the user for other things, perhaps. |
fb15c113 | 2525 | (run-hook-with-args-until-failure 'kill-emacs-query-functions) |
b4da00e9 RM |
2526 | (kill-emacs))) |
2527 | \f | |
2528 | (define-key ctl-x-map "\C-f" 'find-file) | |
2529 | (define-key ctl-x-map "\C-q" 'toggle-read-only) | |
2530 | (define-key ctl-x-map "\C-r" 'find-file-read-only) | |
2531 | (define-key ctl-x-map "\C-v" 'find-alternate-file) | |
2532 | (define-key ctl-x-map "\C-s" 'save-buffer) | |
2533 | (define-key ctl-x-map "s" 'save-some-buffers) | |
2534 | (define-key ctl-x-map "\C-w" 'write-file) | |
2535 | (define-key ctl-x-map "i" 'insert-file) | |
2536 | (define-key esc-map "~" 'not-modified) | |
2537 | (define-key ctl-x-map "\C-d" 'list-directory) | |
2538 | (define-key ctl-x-map "\C-c" 'save-buffers-kill-emacs) | |
2539 | ||
2540 | (define-key ctl-x-4-map "f" 'find-file-other-window) | |
2541 | (define-key ctl-x-4-map "r" 'find-file-read-only-other-window) | |
2542 | (define-key ctl-x-4-map "\C-f" 'find-file-other-window) | |
2543 | (define-key ctl-x-4-map "b" 'switch-to-buffer-other-window) | |
924f0a24 | 2544 | (define-key ctl-x-4-map "\C-o" 'display-buffer) |
5bbbceb1 | 2545 | |
f98955ea JB |
2546 | (define-key ctl-x-5-map "b" 'switch-to-buffer-other-frame) |
2547 | (define-key ctl-x-5-map "f" 'find-file-other-frame) | |
2548 | (define-key ctl-x-5-map "\C-f" 'find-file-other-frame) | |
2549 | (define-key ctl-x-5-map "r" 'find-file-read-only-other-frame) | |
c0274f38 ER |
2550 | |
2551 | ;;; files.el ends here |