Mercurial > hg > xemacs-beta
annotate lisp/files.el @ 4640:8cef85a39d2c
Make CDPATH handling portable, accept entries not matching "/$".
2009-06-06 Aidan Kehoe <kehoea@parhasard.net>
* files.el (cd):
Make CDPATH handling portable, accept entries without trailing
slashes within it. Some style corrections from Stephen Turnbull,
thank you Stephen.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Sat, 06 Jun 2009 17:20:21 +0100 |
| parents | 555e21a66d51 |
| children | f2a991ff6db0 |
| rev | line source |
|---|---|
| 428 | 1 ;;; files.el --- file input and output commands for XEmacs. |
| 2 | |
| 3 ;; Copyright (C) 1985-1987, 1992-1995, 1997 Free Software Foundation, Inc. | |
| 4 ;; Copyright (C) 1995 Sun Microsystems. | |
| 1333 | 5 ;; Copyright (C) 2001, 2002, 2003 Ben Wing. |
| 428 | 6 |
| 7 ;; Maintainer: XEmacs Development Team | |
| 8 ;; Keywords: extensions, dumped | |
| 9 | |
| 10 ;; This file is part of XEmacs. | |
| 11 | |
| 12 ;; XEmacs is free software; you can redistribute it and/or modify it | |
| 13 ;; under the terms of the GNU General Public License as published by | |
| 14 ;; the Free Software Foundation; either version 2, or (at your option) | |
| 15 ;; any later version. | |
| 16 | |
| 17 ;; XEmacs is distributed in the hope that it will be useful, but | |
| 18 ;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 20 ;; General Public License for more details. | |
| 21 | |
| 22 ;; You should have received a copy of the GNU General Public License | |
| 23 ;; along with XEmacs; see the file COPYING. If not, write to the Free | |
| 24 ;; Software Foundation, Inc. 59 Temple Place - Suite 330, Boston, MA | |
| 25 ;; 02111-1307, USA. | |
| 26 | |
| 1333 | 27 ;;; [[ Synched up with: FSF 20.3 (but diverging) |
| 28 ;;; Warning: Merging this file is tough. Beware.]] | |
| 29 | |
| 30 ;;; Beware of sync messages with 20.x or 21.x! (Unless I did them, of | |
| 31 ;;; course ... :-) Those who did these synchronizations did not do proper | |
| 32 ;;; jobs and often left out lots of changes. In practice you need to do a | |
| 33 ;;; line-by-line comparison, and whenever encountering differences, see | |
| 34 ;;; what FSF 19.34 looks like to see if the changes are intentional or just | |
| 35 ;;; regressions. In at least one case below, our code was unchanged from | |
| 36 ;;; FSF 19.30! --ben | |
| 37 | |
| 38 ;;; Mostly synched to FSF 21.2 by Ben Wing using a line-by-line comparison, | |
| 39 ;;; except some really hard parts that have changed almost completely. | |
| 428 | 40 |
| 41 ;;; Commentary: | |
| 42 | |
| 43 ;; This file is dumped with XEmacs. | |
| 44 | |
| 1333 | 45 ;; BEGIN SYNC WITH FSF 21.2. |
| 46 | |
| 428 | 47 ;; Defines most of XEmacs's file- and directory-handling functions, |
| 48 ;; including basic file visiting, backup generation, link handling, | |
| 49 ;; ITS-id version control, load- and write-hook handling, and the like. | |
| 50 | |
| 51 ;;; Code: | |
| 52 | |
| 53 ;; XEmacs: Avoid compilation warnings. | |
| 54 (defvar coding-system-for-read) | |
| 55 (defvar buffer-file-coding-system) | |
| 56 | |
| 57 (defgroup files nil | |
| 58 "Support editing files." | |
| 59 :group 'emacs) | |
| 60 | |
| 61 (defgroup backup nil | |
| 62 "Backups of edited data files." | |
| 63 :group 'files) | |
| 64 | |
| 65 (defgroup find-file nil | |
| 66 "Finding and editing files." | |
| 67 :group 'files) | |
| 68 | |
| 1333 | 69 ;; XEmacs: In buffer.c (also) |
| 70 (defcustom delete-auto-save-files t | |
| 71 "*Non-nil means delete auto-save file when a buffer is saved or killed. | |
| 72 | |
| 73 Note that auto-save file will not be deleted if the buffer is killed | |
| 74 when it has unsaved changes." | |
| 75 :type 'boolean | |
| 76 :group 'auto-save) | |
| 428 | 77 |
| 78 ;; FSF has automount-dir-prefix. Our directory-abbrev-alist is more general. | |
| 79 ;; note: tmp_mnt bogosity conversion is established in paths.el. | |
| 80 (defcustom directory-abbrev-alist nil | |
| 81 "*Alist of abbreviations for file directories. | |
| 82 A list of elements of the form (FROM . TO), each meaning to replace | |
| 83 FROM with TO when it appears in a directory name. | |
| 84 This replacement is done when setting up the default directory of a | |
| 85 newly visited file. *Every* FROM string should start with \\\\` or ^. | |
| 86 | |
| 1333 | 87 Do not use `~' in the TO strings. |
| 88 They should be ordinary absolute directory names. | |
| 89 | |
| 428 | 90 Use this feature when you have directories which you normally refer to |
| 91 via absolute symbolic links or to eliminate automounter mount points | |
| 92 from the beginning of your filenames. Make TO the name of the link, | |
| 93 and FROM the name it is linked to." | |
| 94 :type '(repeat (cons :format "%v" | |
| 95 :value ("\\`" . "") | |
| 96 (regexp :tag "From") | |
| 97 (regexp :tag "To"))) | |
| 98 :group 'find-file) | |
| 99 | |
| 100 (defcustom make-backup-files t | |
| 101 "*Non-nil means make a backup of a file the first time it is saved. | |
| 102 This can be done by renaming the file or by copying. | |
| 103 | |
| 104 Renaming means that XEmacs renames the existing file so that it is a | |
| 105 backup file, then writes the buffer into a new file. Any other names | |
| 106 that the old file had will now refer to the backup file. The new file | |
| 107 is owned by you and its group is defaulted. | |
| 108 | |
| 109 Copying means that XEmacs copies the existing file into the backup | |
| 110 file, then writes the buffer on top of the existing file. Any other | |
| 111 names that the old file had will now refer to the new (edited) file. | |
| 112 The file's owner and group are unchanged. | |
| 113 | |
| 114 The choice of renaming or copying is controlled by the variables | |
| 115 `backup-by-copying', `backup-by-copying-when-linked' and | |
| 1333 | 116 `backup-by-copying-when-mismatch' and |
| 117 `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'." | |
| 428 | 118 :type 'boolean |
| 119 :group 'backup) | |
| 120 | |
| 121 ;; Do this so that local variables based on the file name | |
| 122 ;; are not overridden by the major mode. | |
| 123 (defvar backup-inhibited nil | |
| 124 "Non-nil means don't make a backup, regardless of the other parameters. | |
| 125 This variable is intended for use by making it local to a buffer. | |
| 126 But it is local only if you make it local.") | |
| 127 (put 'backup-inhibited 'permanent-local t) | |
| 128 | |
| 129 (defcustom backup-by-copying nil | |
| 130 "*Non-nil means always use copying to create backup files. | |
| 131 See documentation of variable `make-backup-files'." | |
| 132 :type 'boolean | |
| 133 :group 'backup) | |
| 134 | |
| 135 (defcustom backup-by-copying-when-linked nil | |
| 136 "*Non-nil means use copying to create backups for files with multiple names. | |
| 137 This causes the alternate names to refer to the latest version as edited. | |
| 138 This variable is relevant only if `backup-by-copying' is nil." | |
| 139 :type 'boolean | |
| 140 :group 'backup) | |
| 141 | |
| 142 (defcustom backup-by-copying-when-mismatch nil | |
| 143 "*Non-nil means create backups by copying if this preserves owner or group. | |
| 144 Renaming may still be used (subject to control of other variables) | |
| 145 when it would not result in changing the owner or group of the file; | |
| 146 that is, for files which are owned by you and whose group matches | |
| 147 the default for a new file created there by you. | |
| 148 This variable is relevant only if `backup-by-copying' is nil." | |
| 149 :type 'boolean | |
| 150 :group 'backup) | |
| 151 | |
| 1333 | 152 (defcustom backup-by-copying-when-privileged-mismatch 200 |
| 153 "*Non-nil means create backups by copying to preserve a privileged owner. | |
| 154 Renaming may still be used (subject to control of other variables) | |
| 155 when it would not result in changing the owner of the file or if the owner | |
| 156 has a user id greater than the value of this variable. This is useful | |
| 157 when low-numbered uid's are used for special system users (such as root) | |
| 158 that must maintain ownership of certain files. | |
| 159 This variable is relevant only if `backup-by-copying' and | |
| 160 `backup-by-copying-when-mismatch' are nil." | |
| 161 :type '(choice (const nil) integer) | |
| 162 :group 'backup) | |
| 163 | |
| 164 (defun normal-backup-enable-predicate (name) | |
| 165 "Default `backup-enable-predicate' function. | |
| 4266 | 166 Checks for files in the directory returned by `temp-directory' or specified |
| 167 by `small-temporary-file-directory'." | |
| 1333 | 168 (let ((temporary-file-directory (temp-directory))) |
| 169 (not (or (let ((comp (compare-strings temporary-file-directory 0 nil | |
| 170 name 0 nil))) | |
| 171 ;; Directory is under temporary-file-directory. | |
| 172 (and (not (eq comp t)) | |
| 173 (< comp (- (length temporary-file-directory))))) | |
| 174 (if small-temporary-file-directory | |
| 175 (let ((comp (compare-strings small-temporary-file-directory | |
| 176 0 nil | |
| 177 name 0 nil))) | |
| 178 ;; Directory is under small-temporary-file-directory. | |
| 179 (and (not (eq comp t)) | |
| 180 (< comp (- (length small-temporary-file-directory)))))))))) | |
| 181 | |
| 182 (defvar backup-enable-predicate 'normal-backup-enable-predicate | |
| 428 | 183 "Predicate that looks at a file name and decides whether to make backups. |
| 184 Called with an absolute file name as argument, it returns t to enable backup.") | |
| 185 | |
| 186 (defcustom buffer-offer-save nil | |
| 1333 | 187 "*Non-nil in a buffer means always offer to save buffer on exit. |
| 188 Do so even if the buffer is not visiting a file. | |
| 428 | 189 Automatically local in all buffers." |
| 190 :type 'boolean | |
| 191 :group 'find-file) | |
| 192 (make-variable-buffer-local 'buffer-offer-save) | |
| 193 | |
| 194 ;; FSF uses normal defconst | |
| 195 (defvaralias 'find-file-visit-truename 'find-file-use-truenames) | |
| 196 (defvaralias 'find-file-existing-other-name 'find-file-compare-truenames) | |
| 197 | |
| 198 (defcustom revert-without-query nil | |
| 199 "*Specify which files should be reverted without query. | |
| 200 The value is a list of regular expressions. | |
| 201 If the file name matches one of these regular expressions, | |
| 202 then `revert-buffer' reverts the file without querying | |
| 203 if the file has changed on disk and you have not edited the buffer." | |
| 204 :type '(repeat (regexp "")) | |
| 205 :group 'find-file) | |
| 206 | |
| 207 (defvar buffer-file-number nil | |
| 208 "The device number and file number of the file visited in the current buffer. | |
| 209 The value is a list of the form (FILENUM DEVNUM). | |
| 210 This pair of numbers uniquely identifies the file. | |
| 211 If the buffer is visiting a new file, the value is nil.") | |
| 212 (make-variable-buffer-local 'buffer-file-number) | |
| 213 (put 'buffer-file-number 'permanent-local t) | |
| 214 | |
| 215 (defvar buffer-file-numbers-unique (not (memq system-type '(windows-nt))) | |
| 216 "Non-nil means that buffer-file-number uniquely identifies files.") | |
| 217 | |
| 1333 | 218 ;; FSF 21.2. We use (temp-directory). |
| 219 ; (defvar temporary-file-directory | |
| 220 ; (file-name-as-directory | |
| 221 ; (cond ((memq system-type '(ms-dos windows-nt)) | |
| 222 ; (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp")) | |
| 223 ; ((memq system-type '(vax-vms axp-vms)) | |
| 224 ; (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:")) | |
| 225 ; (t | |
| 226 ; (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp")))) | |
| 227 ; "The directory for writing temporary files.") | |
| 228 | |
| 229 (defvar small-temporary-file-directory | |
| 230 (if (eq system-type 'ms-dos) (getenv "TMPDIR")) | |
| 231 "The directory for writing small temporary files. | |
| 232 If non-nil, this directory is used instead of `temporary-file-directory' | |
| 233 by programs that create small temporary files. This is for systems that | |
| 234 have fast storage with limited space, such as a RAM disk.") | |
| 235 | |
| 236 ; (defvar file-name-invalid-regexp | |
| 237 ; (cond ((and (eq system-type 'ms-dos) (not (msdos-long-file-names))) | |
| 238 ; (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive | |
| 239 ; "[+, ;=|<>\"?*]\\|\\[\\|\\]\\|" ; invalid characters | |
| 240 ; "[\000-\031]\\|" ; control characters | |
| 241 ; "\\(/\\.\\.?[^/]\\)\\|" ; leading dots | |
| 242 ; "\\(/[^/.]+\\.[^/.]*\\.\\)")) ; more than a single dot | |
| 243 ; ((memq system-type '(ms-dos windows-nt)) | |
| 244 ; (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive | |
| 245 ; "[|<>\"?*\000-\031]")) ; invalid characters | |
| 246 ; (t "[\000]")) | |
| 247 ; "Regexp recognizing file names which aren't allowed by the filesystem.") | |
| 248 | |
| 428 | 249 (defcustom file-precious-flag nil |
| 250 "*Non-nil means protect against I/O errors while saving files. | |
| 251 Some modes set this non-nil in particular buffers. | |
| 252 | |
| 253 This feature works by writing the new contents into a temporary file | |
| 254 and then renaming the temporary file to replace the original. | |
| 255 In this way, any I/O error in writing leaves the original untouched, | |
| 256 and there is never any instant where the file is nonexistent. | |
| 257 | |
| 258 Note that this feature forces backups to be made by copying. | |
| 259 Yet, at the same time, saving a precious file | |
| 260 breaks any hard links between it and other files." | |
| 261 :type 'boolean | |
| 262 :group 'backup) | |
| 263 | |
| 264 (defcustom version-control nil | |
| 265 "*Control use of version numbers for backup files. | |
| 266 t means make numeric backup versions unconditionally. | |
| 267 nil means make them for files that have some already. | |
| 268 `never' means do not make them." | |
| 1333 | 269 :type '(choice (const :tag "Never" never) |
| 270 (const :tag "If existing" nil) | |
| 271 (other :tag "Always" t)) | |
| 428 | 272 :group 'backup |
| 273 :group 'vc) | |
| 274 | |
| 275 ;; This is now defined in efs. | |
| 1333 | 276 ; (defcustom dired-kept-versions 2 |
| 277 ; "*When cleaning directory, number of versions to keep." | |
| 278 ; :type 'integer | |
| 279 ; :group 'backup | |
| 280 ; :group 'dired) | |
| 428 | 281 |
| 2103 | 282 (defcustom delete-old-versions (when noninteractive 'leave) |
| 428 | 283 "*If t, delete excess backup versions silently. |
| 284 If nil, ask confirmation. Any other value prevents any trimming." | |
| 285 :type '(choice (const :tag "Delete" t) | |
| 286 (const :tag "Ask" nil) | |
| 287 (sexp :tag "Leave" :format "%t\n" other)) | |
| 288 :group 'backup) | |
| 289 | |
| 290 (defcustom kept-old-versions 2 | |
| 291 "*Number of oldest versions to keep when a new numbered backup is made." | |
| 292 :type 'integer | |
| 293 :group 'backup) | |
| 294 | |
| 295 (defcustom kept-new-versions 2 | |
| 296 "*Number of newest versions to keep when a new numbered backup is made. | |
| 297 Includes the new backup. Must be > 0" | |
| 298 :type 'integer | |
| 299 :group 'backup) | |
| 300 | |
| 301 (defcustom require-final-newline nil | |
| 302 "*Value of t says silently ensure a file ends in a newline when it is saved. | |
| 303 Non-nil but not t says ask user whether to add a newline when there isn't one. | |
| 304 nil means don't add newlines." | |
| 305 :type '(choice (const :tag "Off" nil) | |
| 306 (const :tag "Add" t) | |
| 307 (sexp :tag "Ask" :format "%t\n" ask)) | |
| 308 :group 'editing-basics) | |
| 309 | |
| 310 (defcustom auto-save-default t | |
| 311 "*Non-nil says by default do auto-saving of every file-visiting buffer." | |
| 312 :type 'boolean | |
| 313 :group 'auto-save) | |
| 314 | |
| 315 (defcustom auto-save-visited-file-name nil | |
| 316 "*Non-nil says auto-save a buffer in the file it is visiting, when practical. | |
| 317 Normally auto-save files are written under other names." | |
| 318 :type 'boolean | |
| 319 :group 'auto-save) | |
| 320 | |
| 1333 | 321 (defcustom auto-save-file-name-transforms |
| 322 `(("\\`/[^/]*:\\(.+/\\)*\\(.*\\)" | |
| 323 ,(expand-file-name "\\2" (temp-directory)))) | |
| 324 "*Transforms to apply to buffer file name before making auto-save file name. | |
| 325 Each transform is a list (REGEXP REPLACEMENT): | |
| 326 REGEXP is a regular expression to match against the file name. | |
| 327 If it matches, `replace-match' is used to replace the | |
| 328 matching part with REPLACEMENT. | |
| 329 All the transforms in the list are tried, in the order they are listed. | |
| 330 When one transform applies, its result is final; | |
| 331 no further transforms are tried. | |
| 332 | |
| 4266 | 333 The default value is set up to put the auto-save file into the temporary |
| 334 directory (see the function `temp-directory') for editing a remote file." | |
| 1333 | 335 :group 'auto-save |
| 336 :type '(repeat (list (string :tag "Regexp") (string :tag "Replacement"))) | |
| 337 ;:version "21.1" | |
| 338 ) | |
| 339 | |
| 428 | 340 (defcustom save-abbrevs nil |
| 1333 | 341 "*Non-nil means save word abbrevs too when files are saved. |
| 342 If `silently', don't ask the user before saving. | |
| 1337 | 343 Loading an abbrev file sets this to t." |
| 1333 | 344 :type '(choice (const t) (const nil) (const silently)) |
| 1337 | 345 :group 'abbrev) |
| 346 | |
| 428 | 347 (defcustom find-file-run-dired t |
| 1333 | 348 "*Non-nil means allow `find-file' to visit directories. |
| 349 To visit the directory, `find-file' runs `find-directory-functions'." | |
| 350 :type 'boolean | |
| 351 :group 'find-file) | |
| 352 | |
| 353 (defcustom find-directory-functions '(cvs-dired-noselect dired-noselect) | |
| 354 "*List of functions to try in sequence to visit a directory. | |
| 355 Each function is called with the directory name as the sole argument | |
| 356 and should return either a buffer or nil." | |
| 357 :type '(hook :options (cvs-dired-noselect dired-noselect)) | |
| 428 | 358 :group 'find-file) |
| 359 | |
| 360 ;;;It is not useful to make this a local variable. | |
| 361 ;;;(put 'find-file-not-found-hooks 'permanent-local t) | |
| 362 (defvar find-file-not-found-hooks nil | |
| 363 "List of functions to be called for `find-file' on nonexistent file. | |
| 364 These functions are called as soon as the error is detected. | |
| 1333 | 365 Variable `buffer-file-name' is already set up. |
| 428 | 366 The functions are called in the order given until one of them returns non-nil.") |
| 367 | |
| 368 ;;;It is not useful to make this a local variable. | |
| 369 ;;;(put 'find-file-hooks 'permanent-local t) | |
| 370 (defvar find-file-hooks nil | |
| 371 "List of functions to be called after a buffer is loaded from a file. | |
| 372 The buffer's local variables (if any) will have been processed before the | |
| 373 functions are called.") | |
| 374 | |
| 375 (defvar write-file-hooks nil | |
| 376 "List of functions to be called before writing out a buffer to a file. | |
| 377 If one of them returns non-nil, the file is considered already written | |
| 378 and the rest are not called. | |
| 379 These hooks are considered to pertain to the visited file. | |
| 1333 | 380 So any buffer-local binding of `write-file-hooks' is |
| 381 discarded if you change the visited file name with \\[set-visited-file-name]. | |
| 382 | |
| 383 Don't make this variable buffer-local; instead, use `local-write-file-hooks'. | |
| 428 | 384 See also `write-contents-hooks' and `continue-save-buffer'.") |
| 385 ;;; However, in case someone does make it local... | |
| 386 (put 'write-file-hooks 'permanent-local t) | |
| 387 | |
| 388 (defvar local-write-file-hooks nil | |
| 389 "Just like `write-file-hooks', except intended for per-buffer use. | |
| 390 The functions in this list are called before the ones in | |
| 391 `write-file-hooks'. | |
| 392 | |
| 393 This variable is meant to be used for hooks that have to do with a | |
| 394 particular visited file. Therefore, it is a permanent local, so that | |
| 395 changing the major mode does not clear it. However, calling | |
| 396 `set-visited-file-name' does clear it.") | |
| 397 (make-variable-buffer-local 'local-write-file-hooks) | |
| 398 (put 'local-write-file-hooks 'permanent-local t) | |
| 399 | |
| 400 | |
| 401 ;; #### think about this (added by Sun). | |
| 402 (put 'after-set-visited-file-name-hooks 'permanent-local t) | |
| 403 (defvar after-set-visited-file-name-hooks nil | |
| 404 "List of functions to be called after \\[set-visited-file-name] | |
| 405 or during \\[write-file]. | |
| 444 | 406 You can use this hook to restore local values of `write-file-hooks', |
| 407 `after-save-hook', and `revert-buffer-function', which pertain | |
| 428 | 408 to a specific file and therefore are normally killed by a rename. |
| 444 | 409 Put hooks pertaining to the buffer contents on `write-contents-hooks' |
| 410 and `revert-buffer-insert-file-contents-function'.") | |
| 428 | 411 |
| 412 (defvar write-contents-hooks nil | |
| 413 "List of functions to be called before writing out a buffer to a file. | |
| 414 If one of them returns non-nil, the file is considered already written | |
| 415 and the rest are not called. | |
| 1333 | 416 |
| 417 This variable is meant to be used for hooks that pertain to the | |
| 418 buffer's contents, not to the particular visited file; thus, | |
| 419 `set-visited-file-name' does not clear this variable; but changing the | |
| 420 major mode does clear it. | |
| 421 | |
| 422 This variable automatically becomes buffer-local whenever it is set. | |
| 423 If you use `add-hook' to add elements to the list, use nil for the | |
| 424 LOCAL argument. | |
| 425 | |
| 428 | 426 See also `write-file-hooks' and `continue-save-buffer'.") |
| 1333 | 427 (make-variable-buffer-local 'write-contents-hooks) |
| 428 | 428 |
| 429 ;; XEmacs addition | |
| 430 ;; Energize needed this to hook into save-buffer at a lower level; we need | |
| 431 ;; to provide a new output method, but don't want to have to duplicate all | |
| 432 ;; of the backup file and file modes logic.that does not occur if one uses | |
| 433 ;; a write-file-hook which returns non-nil. | |
| 434 (put 'write-file-data-hooks 'permanent-local t) | |
| 435 (defvar write-file-data-hooks nil | |
| 436 "List of functions to be called to put the bytes on disk. | |
| 437 These functions receive the name of the file to write to as argument. | |
| 438 The default behavior is to call | |
| 439 (write-region (point-min) (point-max) filename nil t) | |
| 440 If one of them returns non-nil, the file is considered already written | |
| 441 and the rest are not called. | |
| 442 These hooks are considered to pertain to the visited file. | |
| 1333 | 443 So any buffer-local binding of `write-file-data-hooks' is |
| 444 discarded if you change the visited file name with \\[set-visited-file-name]. | |
| 428 | 445 See also `write-file-hooks'.") |
| 446 | |
| 447 (defcustom enable-local-variables t | |
| 1333 | 448 "*Control use of local variables in files you visit. |
| 428 | 449 The value can be t, nil or something else. |
| 1333 | 450 A value of t means file local variables specifications are obeyed; |
| 428 | 451 nil means they are ignored; anything else means query. |
| 1333 | 452 This variable also controls use of major modes specified in |
| 453 a -*- line. | |
| 454 | |
| 455 The command \\[normal-mode], when used interactively, | |
| 456 always obeys file local variable specifications and the -*- line, | |
| 428 | 457 and ignores this variable." |
| 458 :type '(choice (const :tag "Obey" t) | |
| 459 (const :tag "Ignore" nil) | |
| 460 (sexp :tag "Query" :format "%t\n" other)) | |
| 461 :group 'find-file) | |
| 462 | |
| 1333 | 463 ; (defvar local-enable-local-variables t |
| 464 ; "Like `enable-local-variables' but meant for buffer-local bindings. | |
| 465 ; The meaningful values are nil and non-nil. The default is non-nil. | |
| 466 ; If a major mode sets this to nil, buffer-locally, then any local | |
| 467 ; variables list in the file will be ignored. | |
| 468 | |
| 469 ; This variable does not affect the use of major modes | |
| 470 ; specified in a -*- line.") | |
| 471 | |
| 428 | 472 (defcustom enable-local-eval 'maybe |
| 473 "*Control processing of the \"variable\" `eval' in a file's local variables. | |
| 474 The value can be t, nil or something else. | |
| 475 A value of t means obey `eval' variables; | |
| 476 nil means ignore them; anything else means query. | |
| 477 | |
| 478 The command \\[normal-mode] always obeys local-variables lists | |
| 479 and ignores this variable." | |
| 480 :type '(choice (const :tag "Obey" t) | |
| 481 (const :tag "Ignore" nil) | |
| 482 (sexp :tag "Query" :format "%t\n" other)) | |
| 483 :group 'find-file) | |
| 484 | |
| 485 ;; Avoid losing in versions where CLASH_DETECTION is disabled. | |
| 486 (or (fboundp 'lock-buffer) | |
| 487 (defalias 'lock-buffer 'ignore)) | |
| 488 (or (fboundp 'unlock-buffer) | |
| 489 (defalias 'unlock-buffer 'ignore)) | |
| 1333 | 490 (or (fboundp 'file-locked-p) |
| 491 (defalias 'file-locked-p 'ignore)) | |
| 492 | |
| 493 (defvar view-read-only nil | |
| 494 "*Non-nil means buffers visiting files read-only, do it in view mode.") | |
| 428 | 495 |
| 496 ;;FSFmacs bastardized ange-ftp cruft | |
| 497 ;(defun ange-ftp-completion-hook-function (op &rest args) | |
| 1333 | 498 ; "Provides support for ange-ftp host name completion. |
| 499 ;Runs the usual ange-ftp hook, but only for completion operations." | |
| 500 ; ;; Having this here avoids the need to load ange-ftp when it's not | |
| 501 ; ;; really in use. | |
| 428 | 502 ; (if (memq op '(file-name-completion file-name-all-completions)) |
| 503 ; (apply 'ange-ftp-hook-function op args) | |
| 504 ; (let ((inhibit-file-name-handlers | |
| 505 ; (cons 'ange-ftp-completion-hook-function | |
| 506 ; (and (eq inhibit-file-name-operation op) | |
| 507 ; inhibit-file-name-handlers))) | |
| 508 ; (inhibit-file-name-operation op)) | |
| 509 ; (apply op args)) | |
| 510 | |
| 1333 | 511 ;; FSF 21.2: |
| 512 ;This function's standard definition is trivial; it just returns the argument. | |
| 513 ;However, on some systems, the function is redefined with a definition | |
| 514 ;that really does change some file names to canonicalize certain | |
| 515 ;patterns and to guarantee valid names." | |
| 428 | 516 (defun convert-standard-filename (filename) |
| 464 | 517 "Convert a standard file's name to something suitable for the current OS." |
| 518 (if (eq system-type 'windows-nt) | |
| 519 (let ((name (copy-sequence filename)) | |
| 520 (start 0)) | |
| 521 ;; leave ':' if part of drive specifier | |
| 819 | 522 (if (and (> (length name) 1) |
| 523 (eq (aref name 1) ?:)) | |
| 464 | 524 (setq start 2)) |
| 525 ;; destructively replace invalid filename characters with ! | |
| 526 (while (string-match "[?*:<>|\"\000-\037]" name start) | |
| 527 (aset name (match-beginning 0) ?!) | |
| 528 (setq start (match-end 0))) | |
| 529 ;; FSF: [convert directory separators to Windows format ...] | |
| 530 ;; unneeded in XEmacs. | |
| 531 name) | |
| 532 filename)) | |
| 533 | |
| 428 | 534 |
| 535 (defun pwd () | |
| 536 "Show the current default directory." | |
| 537 (interactive nil) | |
| 538 (message "Directory %s" default-directory)) | |
| 539 | |
| 540 (defvar cd-path nil | |
| 541 "Value of the CDPATH environment variable, as a list. | |
| 542 Not actually set up until the first time you use it.") | |
| 543 | |
| 544 (defvar cdpath-previous nil | |
| 545 "Prior value of the CDPATH environment variable.") | |
| 546 | |
| 547 (defun parse-colon-path (cd-path) | |
| 548 "Explode a colon-separated search path into a list of directory names. | |
| 549 | |
| 550 If you think you want to use this, you probably don't. This function | |
| 551 is provided for backward compatibility. A more robust implementation | |
| 552 of the same functionality is available as `split-path', which see." | |
| 553 (and cd-path | |
| 554 (let (cd-list (cd-start 0) cd-colon) | |
| 555 (setq cd-path (concat cd-path path-separator)) | |
| 556 (while (setq cd-colon (string-match path-separator cd-path cd-start)) | |
| 557 (setq cd-list | |
| 558 (nconc cd-list | |
| 559 (list (if (= cd-start cd-colon) | |
| 560 nil | |
| 561 (substitute-in-file-name | |
| 562 (file-name-as-directory | |
| 563 (substring cd-path cd-start cd-colon))))))) | |
| 564 (setq cd-start (+ cd-colon 1))) | |
| 565 cd-list))) | |
| 566 | |
| 567 (defun cd-absolute (dir) | |
| 568 "Change current directory to given absolute file name DIR." | |
| 569 ;; Put the name into directory syntax now, | |
| 570 ;; because otherwise expand-file-name may give some bad results. | |
| 571 (setq dir (file-name-as-directory dir)) | |
| 572 ;; XEmacs change: stig@hackvan.com | |
| 573 (if find-file-use-truenames | |
| 574 (setq dir (file-truename dir))) | |
| 575 (setq dir (abbreviate-file-name (expand-file-name dir))) | |
| 576 (cond ((not (file-directory-p dir)) | |
| 1333 | 577 (if (file-exists-p dir) |
| 578 (error "%s is not a directory" dir) | |
| 579 (error "%s: no such directory" dir))) | |
| 428 | 580 ;; this breaks ange-ftp, which doesn't (can't?) overload `file-executable-p'. |
| 581 ;;((not (file-executable-p dir)) | |
| 582 ;; (error "Cannot cd to %s: Permission denied" dir)) | |
| 583 (t | |
| 584 (setq default-directory dir)))) | |
| 585 | |
| 586 (defun cd (dir) | |
| 587 "Make DIR become the current buffer's default directory. | |
| 588 If your environment includes a `CDPATH' variable, try each one of that | |
| 589 colon-separated list of directories when resolving a relative directory name." | |
| 590 (interactive | |
| 591 ;; XEmacs change? (read-file-name => read-directory-name) | |
| 592 (list (read-directory-name "Change default directory: " | |
| 593 default-directory default-directory | |
| 594 (and (member cd-path '(nil ("./"))) | |
| 595 (null (getenv "CDPATH")))))) | |
| 596 (if (file-name-absolute-p dir) | |
| 597 (cd-absolute (expand-file-name dir)) | |
|
4640
8cef85a39d2c
Make CDPATH handling portable, accept entries not matching "/$".
Aidan Kehoe <kehoea@parhasard.net>
parents:
4400
diff
changeset
|
598 ;; XEmacs change. I'm not sure respecting CDPATH is the right thing to |
|
8cef85a39d2c
Make CDPATH handling portable, accept entries not matching "/$".
Aidan Kehoe <kehoea@parhasard.net>
parents:
4400
diff
changeset
|
599 ;; do under Windows. |
| 428 | 600 (unless (and cd-path (equal (getenv "CDPATH") cdpath-previous)) |
|
4640
8cef85a39d2c
Make CDPATH handling portable, accept entries not matching "/$".
Aidan Kehoe <kehoea@parhasard.net>
parents:
4400
diff
changeset
|
601 (let ((trypath (split-path (setq cdpath-previous (getenv "CDPATH"))))) |
|
8cef85a39d2c
Make CDPATH handling portable, accept entries not matching "/$".
Aidan Kehoe <kehoea@parhasard.net>
parents:
4400
diff
changeset
|
602 (setq cd-path (or (and trypath |
|
8cef85a39d2c
Make CDPATH handling portable, accept entries not matching "/$".
Aidan Kehoe <kehoea@parhasard.net>
parents:
4400
diff
changeset
|
603 (mapcar #'file-name-as-directory trypath)) |
|
8cef85a39d2c
Make CDPATH handling portable, accept entries not matching "/$".
Aidan Kehoe <kehoea@parhasard.net>
parents:
4400
diff
changeset
|
604 (file-name-as-directory ""))))) |
| 428 | 605 (or (catch 'found |
| 606 (mapcar #'(lambda (x) | |
| 607 (let ((f (expand-file-name (concat x dir)))) | |
| 608 (if (file-directory-p f) | |
| 609 (progn | |
| 610 (cd-absolute f) | |
| 611 (throw 'found t))))) | |
| 612 cd-path) | |
| 613 nil) | |
| 614 ;; jwz: give a better error message to those of us with the | |
| 615 ;; good taste not to use a kludge like $CDPATH. | |
| 616 (if (equal cd-path '("./")) | |
| 617 (error "No such directory: %s" (expand-file-name dir)) | |
| 618 (error "Directory not found in $CDPATH: %s" dir))))) | |
| 619 | |
| 620 (defun load-file (file) | |
| 621 "Load the Lisp file named FILE." | |
| 1333 | 622 ;; This is a case where .elc makes a lot of sense. |
| 623 (interactive (list (let ((completion-ignored-extensions | |
| 624 (remove ".elc" completion-ignored-extensions))) | |
| 625 (read-file-name "Load file: ")))) | |
| 428 | 626 (load (expand-file-name file) nil nil t)) |
| 627 | |
| 628 ; We now dump utils/lib-complete.el which has improved versions of this. | |
| 629 ;(defun load-library (library) | |
| 630 ; "Load the library named LIBRARY. | |
| 631 ;This is an interface to the function `load'." | |
| 632 ; (interactive "sLoad library: ") | |
| 633 ; (load library)) | |
| 634 ; | |
| 635 ;(defun find-library (library) | |
| 636 ; "Find the library of Lisp code named LIBRARY. | |
| 637 ;This searches `load-path' for a file named either \"LIBRARY\" or \"LIBRARY.el\"." | |
| 638 ; (interactive "sFind library file: ") | |
| 639 ; (let ((f (locate-file library load-path ":.el:"))) | |
| 640 ; (if f | |
| 641 ; (find-file f) | |
| 642 ; (error "Couldn't locate library %s" library)))) | |
| 643 | |
| 1333 | 644 (defun file-local-copy (file) |
| 428 | 645 "Copy the file FILE into a temporary file on this machine. |
| 646 Returns the name of the local copy, or nil, if FILE is directly | |
| 647 accessible." | |
| 1333 | 648 ;; This formerly had an optional BUFFER argument that wasn't used by |
| 649 ;; anything. | |
| 428 | 650 (let ((handler (find-file-name-handler file 'file-local-copy))) |
| 651 (if handler | |
| 652 (funcall handler 'file-local-copy file) | |
| 653 nil))) | |
| 654 | |
| 655 ;; XEmacs change block | |
| 656 ; We have this in C and use the realpath() system call. | |
| 657 | |
| 658 ;(defun file-truename (filename &optional counter prev-dirs) | |
| 659 ; [... lots of code snipped ...] | |
| 660 ; filename)) | |
| 661 | |
| 662 ;; XEmacs addition. Called from `insert-file-contents-internal' | |
| 663 ;; at the appropriate time. | |
| 664 (defun compute-buffer-file-truename (&optional buffer) | |
| 665 "Recompute BUFFER's value of `buffer-file-truename' | |
| 666 based on the current value of `buffer-file-name'. | |
| 667 BUFFER defaults to the current buffer if unspecified." | |
| 668 (save-excursion | |
| 669 (set-buffer (or buffer (current-buffer))) | |
| 670 (cond ((null buffer-file-name) | |
| 671 (setq buffer-file-truename nil)) | |
| 672 ((setq buffer-file-truename (file-truename buffer-file-name)) | |
| 673 ;; it exists, we're done. | |
| 674 nil) | |
| 675 (t | |
| 676 ;; the file doesn't exist, but maybe the directory does. | |
| 677 (let* ((dir (file-name-directory buffer-file-name)) | |
| 678 (truedir (file-truename dir))) | |
| 679 (if truedir (setq dir truedir)) | |
| 680 (setq buffer-file-truename | |
| 681 (expand-file-name (file-name-nondirectory buffer-file-name) | |
| 682 dir))))) | |
| 683 (if (and find-file-use-truenames buffer-file-truename) | |
| 684 (setq buffer-file-name (abbreviate-file-name buffer-file-truename) | |
| 685 default-directory (file-name-directory buffer-file-name))) | |
| 686 buffer-file-truename)) | |
| 687 ;; End XEmacs change block | |
| 688 | |
| 689 (defun file-chase-links (filename) | |
| 690 "Chase links in FILENAME until a name that is not a link. | |
| 691 Does not examine containing directories for links, | |
| 692 unlike `file-truename'." | |
| 693 (let (tem (count 100) (newname filename)) | |
| 694 (while (setq tem (file-symlink-p newname)) | |
| 695 (save-match-data | |
| 696 (if (= count 0) | |
| 697 (error "Apparent cycle of symbolic links for %s" filename)) | |
| 698 ;; In the context of a link, `//' doesn't mean what XEmacs thinks. | |
| 699 (while (string-match "//+" tem) | |
| 1333 | 700 (setq tem (replace-match "/" nil nil tem))) |
| 428 | 701 ;; Handle `..' by hand, since it needs to work in the |
| 702 ;; target of any directory symlink. | |
| 703 ;; This code is not quite complete; it does not handle | |
| 704 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose. | |
| 705 (while (string-match "\\`\\.\\./" tem) ;#### Unix specific | |
| 706 (setq tem (substring tem 3)) | |
| 707 (setq newname (file-name-as-directory | |
| 708 ;; Do the .. by hand. | |
| 709 (directory-file-name | |
| 710 (file-name-directory | |
| 711 ;; Chase links in the default dir of the symlink. | |
| 712 (file-chase-links | |
| 713 (directory-file-name | |
| 714 (file-name-directory newname)))))))) | |
| 715 (setq newname (expand-file-name tem (file-name-directory newname))) | |
| 716 (setq count (1- count)))) | |
| 717 newname)) | |
| 4266 | 718 |
| 719 (defun make-temp-file (prefix &optional dir-flag suffix) | |
| 720 "Create a temporary file. | |
| 721 The returned file name (created by appending some random characters at the | |
| 722 end of PREFIX, and expanding against the return value of `temp-directory' if | |
| 723 necessary), is guaranteed to point to a newly created empty file. You can | |
| 724 then use `write-region' to write new data into the file. | |
| 725 | |
| 726 If DIR-FLAG is non-nil, create a new empty directory instead of a file. | |
| 727 | |
| 728 If SUFFIX is non-nil, add that at the end of the file name. | |
| 729 | |
| 730 This function is analagous to mkstemp(3) under POSIX, avoiding the race | |
| 731 condition between testing for the existence of the generated filename (under | |
| 732 POSIX with mktemp(3), under Emacs Lisp with `make-temp-name') and creating | |
| 733 it." | |
| 734 (let ((umask (default-file-modes)) | |
| 735 (temporary-file-directory (temp-directory)) | |
| 736 file) | |
| 737 (unwind-protect | |
| 738 (progn | |
| 739 ;; Create temp files with strict access rights. It's easy to | |
| 740 ;; loosen them later, whereas it's impossible to close the | |
| 741 ;; time-window of loose permissions otherwise. | |
| 742 (set-default-file-modes #o700) | |
| 743 (while (condition-case () | |
| 744 (progn | |
| 745 (setq file | |
| 746 (make-temp-name | |
| 747 (expand-file-name prefix | |
| 748 temporary-file-directory))) | |
| 749 (if suffix | |
| 750 (setq file (concat file suffix))) | |
| 751 (if dir-flag | |
| 752 (make-directory file) | |
| 753 (write-region "" nil file nil 'silent nil 'excl)) | |
| 754 nil) | |
| 755 (file-already-exists t)) | |
| 756 ;; the file was somehow created by someone else between | |
| 757 ;; `make-temp-name' and `write-region', let's try again. | |
| 758 nil) | |
| 759 file) | |
| 760 ;; Reset the umask. | |
| 761 (set-default-file-modes umask)))) | |
| 762 | |
| 428 | 763 |
| 764 (defun switch-to-other-buffer (arg) | |
| 765 "Switch to the previous buffer. With a numeric arg, n, switch to the nth | |
| 766 most recent buffer. With an arg of 0, buries the current buffer at the | |
| 767 bottom of the buffer stack." | |
| 768 (interactive "p") | |
| 769 (if (eq arg 0) | |
| 770 (bury-buffer (current-buffer))) | |
| 771 (switch-to-buffer | |
| 772 (if (<= arg 1) (other-buffer (current-buffer)) | |
| 773 (nth (1+ arg) (buffer-list))))) | |
| 774 | |
| 1333 | 775 ;;FSF 21.2 |
| 776 ;Optional second arg NORECORD non-nil means | |
| 777 ;do not put this buffer at the front of the list of recently selected ones. | |
| 778 (defun switch-to-buffer-other-window (buffer) ;;FSF 21.2: &optional norecord | |
| 779 "Select buffer BUFFER in another window. | |
| 780 | |
| 781 This uses the function `display-buffer' as a subroutine; see its | |
| 782 documentation for additional customization information." | |
| 783 (interactive "BSwitch to buffer in other window: ") | |
| 428 | 784 (let ((pop-up-windows t)) |
| 785 ;; XEmacs: this used to have (selected-frame) as the third argument, | |
| 786 ;; but this is obnoxious. If the user wants the buffer in a | |
| 787 ;; different frame, then it should be this way. | |
| 788 | |
| 789 ;; Change documented above undone --mrb | |
| 790 (pop-to-buffer buffer t (selected-frame)))) | |
| 1333 | 791 ;(pop-to-buffer buffer t norecord))) |
| 792 | |
| 793 ;; FSF 21.2: | |
| 794 ; (defun switch-to-buffer-other-frame (buffer &optional norecord) | |
| 795 ; "Switch to buffer BUFFER in another frame. | |
| 796 ; Optional second arg NORECORD non-nil means | |
| 797 ; do not put this buffer at the front of the list of recently selected ones. | |
| 798 | |
| 799 ; This uses the function `display-buffer' as a subroutine; see its | |
| 800 ; documentation for additional customization information." | |
| 801 ; (interactive "BSwitch to buffer in other frame: ") | |
| 802 ; (let ((pop-up-frames t)) | |
| 803 ; (pop-to-buffer buffer t norecord) | |
| 804 ; (raise-frame (window-frame (selected-window))))) | |
| 428 | 805 |
| 806 (defun switch-to-buffer-other-frame (buffer) | |
| 1333 | 807 "Switch to buffer BUFFER in a newly-created frame. |
| 808 | |
| 809 This uses the function `display-buffer' as a subroutine; see its | |
| 810 documentation for additional customization information." | |
| 428 | 811 (interactive "BSwitch to buffer in other frame: ") |
| 812 (let* ((name (get-frame-name-for-buffer buffer)) | |
| 813 (frame (make-frame (if name | |
| 814 (list (cons 'name (symbol-name name))))))) | |
| 815 (pop-to-buffer buffer t frame) | |
| 816 (make-frame-visible frame) | |
| 817 buffer)) | |
| 818 | |
| 771 | 819 (defun switch-to-next-buffer (&optional n) |
| 820 "Switch to the next-most-recent buffer. | |
| 821 This essentially rotates the buffer list forward. | |
| 822 N (interactively, the prefix arg) specifies how many times to rotate | |
| 823 forward, and defaults to 1. Buffers whose name begins with a space | |
| 824 \(i.e. \"invisible\" buffers) are ignored." | |
| 825 ;; Here is a different interactive spec. Look up the function | |
| 826 ;; `interactive' (i.e. `C-h f interactive') to understand how this | |
| 827 ;; all works. | |
| 828 (interactive "p") | |
| 829 (dotimes (n (or n 1)) | |
| 830 (loop | |
| 831 do (bury-buffer (car (buffer-list))) | |
| 832 while (funcall buffers-tab-omit-function (car (buffer-list)))) | |
| 833 (switch-to-buffer (car (buffer-list))))) | |
| 834 | |
| 835 (defun switch-to-previous-buffer (&optional n) | |
| 836 "Switch to the previously most-recent buffer. | |
| 837 This essentially rotates the buffer list backward. | |
| 838 N (interactively, the prefix arg) specifies how many times to rotate | |
| 839 backward, and defaults to 1. Buffers whose name begins with a space | |
| 840 \(i.e. \"invisible\" buffers) are ignored." | |
| 841 (interactive "p") | |
| 842 (dotimes (n (or n 1)) | |
| 843 (loop | |
| 844 do (switch-to-buffer (car (last (buffer-list)))) | |
| 845 while (funcall buffers-tab-omit-function (car (buffer-list)))))) | |
| 846 | |
| 847 (defun switch-to-next-buffer-in-group (&optional n) | |
| 848 "Switch to the next-most-recent buffer in the current group. | |
| 849 This essentially rotates the buffer list forward. | |
| 850 N (interactively, the prefix arg) specifies how many times to rotate | |
| 851 forward, and defaults to 1. Buffers whose name begins with a space | |
| 852 \(i.e. \"invisible\" buffers) are ignored." | |
| 853 (interactive "p") | |
| 854 (dotimes (n (or n 1)) | |
| 855 (let ((curbuf (car (buffer-list)))) | |
| 856 (loop | |
| 857 do (bury-buffer (car (buffer-list))) | |
| 858 while (or (funcall buffers-tab-omit-function (car (buffer-list))) | |
| 859 (not (funcall buffers-tab-selection-function | |
| 860 curbuf (car (buffer-list))))))) | |
| 861 (switch-to-buffer (car (buffer-list))))) | |
| 862 | |
| 863 (defun switch-to-previous-buffer-in-group (&optional n) | |
| 864 "Switch to the previously most-recent buffer in the current group. | |
| 865 This essentially rotates the buffer list backward. | |
| 866 N (interactively, the prefix arg) specifies how many times to rotate | |
| 867 backward, and defaults to 1. Buffers whose name begins with a space | |
| 868 \(i.e. \"invisible\" buffers) are ignored." | |
| 869 (interactive "p") | |
| 870 (dotimes (n (or n 1)) | |
| 871 (let ((curbuf (car (buffer-list)))) | |
| 872 (loop | |
| 873 do (switch-to-buffer (car (last (buffer-list)))) | |
| 874 while (or (funcall buffers-tab-omit-function (car (buffer-list))) | |
| 875 (not (funcall buffers-tab-selection-function | |
| 876 curbuf (car (buffer-list))))))))) | |
| 877 | |
| 1333 | 878 (defun find-file (filename &optional codesys wildcards) |
| 428 | 879 "Edit file FILENAME. |
| 771 | 880 Switch to a buffer visiting file FILENAME, creating one if none already |
| 881 exists. Optional second argument specifies the coding system to use when | |
| 882 decoding the file. Interactively, with a prefix argument, you will be | |
| 883 prompted for the coding system. | |
| 884 | |
| 885 If you do not explicitly specify a coding system, the coding system | |
| 886 is determined as follows: | |
| 887 | |
| 888 1. `coding-system-for-read', if non-nil. (This is used by Lisp programs to | |
| 889 temporarily set an overriding coding system and should almost never | |
| 890 apply here in `find-file'.) | |
| 891 2. The result of `insert-file-contents-pre-hook', if non-nil. (This is a | |
| 892 complex interface for handling special cases.) | |
| 893 3. The matching value for this filename from `file-coding-system-alist', | |
| 894 if any. (This lets you specify the coding system to be used for | |
| 895 files with particular extensions, names, etc.) | |
| 896 4. `buffer-file-coding-system-for-read', if non-nil. (This is the global | |
| 897 default -- normally `undecided', so the built-in auto-detection | |
| 898 mechanism can do its thing.) | |
| 899 5. The coding system 'raw-text. | |
| 900 | |
| 901 See `insert-file-contents' for more details about how the process of | |
| 1333 | 902 determining the coding system works. |
| 903 | |
| 904 Interactively, or if WILDCARDS is non-nil in a call from Lisp, | |
| 905 expand wildcards (if any) and visit multiple files. Wildcard expansion | |
| 1745 | 906 can be suppressed by setting `find-file-wildcards' to `nil'." |
| 1333 | 907 (interactive (list (read-file-name "Find file: ") |
| 908 (and current-prefix-arg | |
| 909 (read-coding-system "Coding system: ")) | |
| 910 t)) | |
| 428 | 911 (if codesys |
| 2718 | 912 (let* ((coding-system-for-read (get-coding-system codesys)) |
| 913 (value (find-file-noselect filename nil nil wildcards)) | |
| 914 (bufname (if (listp value) (car (nreverse value)) value))) | |
| 915 ;; If a user explicitly specified the coding system with a prefix | |
| 916 ;; argument when opening a nonexistent file, insert-file-contents | |
| 917 ;; hasn't preserved that coding system as the local | |
| 918 ;; buffer-file-coding-system. Do that ourselves. | |
| 919 (unless (and bufname | |
| 920 (file-exists-p (buffer-file-name bufname)) | |
| 921 (local-variable-p 'buffer-file-coding-system bufname)) | |
| 922 (save-excursion | |
| 923 (set-buffer bufname) | |
| 924 (setq buffer-file-coding-system coding-system-for-read))) | |
| 925 (switch-to-buffer bufname)) | |
| 1333 | 926 (let ((value (find-file-noselect filename nil nil wildcards))) |
| 927 (if (listp value) | |
| 928 (mapcar 'switch-to-buffer (nreverse value)) | |
| 929 (switch-to-buffer value))))) | |
| 930 | |
| 931 (defun find-file-other-window (filename &optional codesys wildcards) | |
| 428 | 932 "Edit file FILENAME, in another window. |
| 771 | 933 May create a new window, or reuse an existing one. See the function |
| 934 `display-buffer'. Optional second argument specifies the coding system to | |
| 935 use when decoding the file. Interactively, with a prefix argument, you | |
| 936 will be prompted for the coding system." | |
| 1333 | 937 (interactive (list (read-file-name "Find file in other window: ") |
| 938 (and current-prefix-arg | |
| 939 (read-coding-system "Coding system: ")) | |
| 940 t)) | |
| 428 | 941 (if codesys |
| 942 (let ((coding-system-for-read | |
| 943 (get-coding-system codesys))) | |
| 1333 | 944 (let ((value (find-file-noselect filename nil nil wildcards))) |
| 945 (if (listp value) | |
| 946 (progn | |
| 947 (setq value (nreverse value)) | |
| 948 (switch-to-buffer-other-window (car value)) | |
| 949 (mapcar 'switch-to-buffer (cdr value))) | |
| 950 (switch-to-buffer-other-window value)))) | |
| 951 (let ((value (find-file-noselect filename nil nil wildcards))) | |
| 952 (if (listp value) | |
| 953 (progn | |
| 954 (setq value (nreverse value)) | |
| 955 (switch-to-buffer-other-window (car value)) | |
| 956 (mapcar 'switch-to-buffer (cdr value))) | |
| 957 (switch-to-buffer-other-window value))))) | |
| 958 | |
| 959 (defun find-file-other-frame (filename &optional codesys wildcards) | |
| 428 | 960 "Edit file FILENAME, in a newly-created frame. |
| 771 | 961 Optional second argument specifies the coding system to use when decoding |
| 962 the file. Interactively, with a prefix argument, you will be prompted for | |
| 963 the coding system." | |
| 1333 | 964 (interactive (list (read-file-name "Find file in other frame: ") |
| 965 (and current-prefix-arg | |
| 966 (read-coding-system "Coding system: ")) | |
| 967 t)) | |
| 428 | 968 (if codesys |
| 969 (let ((coding-system-for-read | |
| 970 (get-coding-system codesys))) | |
| 1333 | 971 (let ((value (find-file-noselect filename nil nil wildcards))) |
| 972 (if (listp value) | |
| 973 (progn | |
| 974 (setq value (nreverse value)) | |
| 975 (switch-to-buffer-other-frame (car value)) | |
| 976 (mapcar 'switch-to-buffer (cdr value))) | |
| 977 (switch-to-buffer-other-frame value)))) | |
| 978 (let ((value (find-file-noselect filename nil nil wildcards))) | |
| 979 (if (listp value) | |
| 980 (progn | |
| 981 (setq value (nreverse value)) | |
| 982 (switch-to-buffer-other-frame (car value)) | |
| 983 (mapcar 'switch-to-buffer (cdr value))) | |
| 984 (switch-to-buffer-other-frame value))))) | |
| 985 | |
| 986 (defun find-file-read-only (filename &optional codesys wildcards) | |
| 428 | 987 "Edit file FILENAME but don't allow changes. |
| 988 Like \\[find-file] but marks buffer as read-only. | |
| 989 Use \\[toggle-read-only] to permit editing. | |
| 771 | 990 Optional second argument specifies the coding system to use when decoding |
| 991 the file. Interactively, with a prefix argument, you will be prompted for | |
| 992 the coding system." | |
| 1333 | 993 (interactive (list (read-file-name "Find file read-only: ") |
| 994 (and current-prefix-arg | |
| 995 (read-coding-system "Coding system: ")) | |
| 996 t)) | |
| 428 | 997 (if codesys |
| 998 (let ((coding-system-for-read | |
| 999 (get-coding-system codesys))) | |
| 1333 | 1000 (find-file filename nil wildcards)) |
| 1001 (find-file filename nil wildcards)) | |
| 428 | 1002 (setq buffer-read-only t) |
| 1003 (current-buffer)) | |
| 1004 | |
| 1333 | 1005 (defun find-file-read-only-other-window (filename &optional codesys wildcards) |
| 428 | 1006 "Edit file FILENAME in another window but don't allow changes. |
| 1007 Like \\[find-file-other-window] but marks buffer as read-only. | |
| 1008 Use \\[toggle-read-only] to permit editing. | |
| 771 | 1009 Optional second argument specifies the coding system to use when decoding |
| 1010 the file. Interactively, with a prefix argument, you will be prompted for | |
| 1011 the coding system." | |
| 1333 | 1012 (interactive (list (read-file-name "Find file read-only other window: ") |
| 1013 (and current-prefix-arg | |
| 1014 (read-coding-system "Coding system: ")) | |
| 1015 t)) | |
| 428 | 1016 (if codesys |
| 1017 (let ((coding-system-for-read | |
| 1018 (get-coding-system codesys))) | |
| 1019 (find-file-other-window filename)) | |
| 1020 (find-file-other-window filename)) | |
| 1021 (setq buffer-read-only t) | |
| 1022 (current-buffer)) | |
| 1023 | |
| 1333 | 1024 (defun find-file-read-only-other-frame (filename &optional codesys wildcards) |
| 428 | 1025 "Edit file FILENAME in another frame but don't allow changes. |
| 1026 Like \\[find-file-other-frame] but marks buffer as read-only. | |
| 1027 Use \\[toggle-read-only] to permit editing. | |
| 771 | 1028 Optional second argument specifies the coding system to use when decoding |
| 1029 the file. Interactively, with a prefix argument, you will be prompted for | |
| 1030 the coding system." | |
| 1333 | 1031 (interactive (list (read-file-name "Find file read-only other frame: ") |
| 1032 (and current-prefix-arg | |
| 1033 (read-coding-system "Coding system: ")) | |
| 1034 t)) | |
| 428 | 1035 (if codesys |
| 1036 (let ((coding-system-for-read | |
| 1037 (get-coding-system codesys))) | |
| 1038 (find-file-other-frame filename)) | |
| 1039 (find-file-other-frame filename)) | |
| 1040 (setq buffer-read-only t) | |
| 1041 (current-buffer)) | |
| 1042 | |
| 1043 (defun find-alternate-file-other-window (filename &optional codesys) | |
| 1044 "Find file FILENAME as a replacement for the file in the next window. | |
| 771 | 1045 This command does not select that window. Optional second argument |
| 1046 specifies the coding system to use when decoding the file. Interactively, | |
| 428 | 1047 with a prefix argument, you will be prompted for the coding system." |
| 1048 (interactive | |
| 1049 (save-selected-window | |
| 1050 (other-window 1) | |
| 1051 (let ((file buffer-file-name) | |
| 1052 (file-name nil) | |
| 1053 (file-dir nil)) | |
| 1054 (and file | |
| 1055 (setq file-name (file-name-nondirectory file) | |
| 1056 file-dir (file-name-directory file))) | |
| 1057 (list (read-file-name | |
| 1058 "Find alternate file: " file-dir nil nil file-name) | |
| 771 | 1059 (if current-prefix-arg (read-coding-system "Coding-system: ")))))) |
| 428 | 1060 (if (one-window-p) |
| 1061 (find-file-other-window filename) | |
| 1062 (save-selected-window | |
| 1063 (other-window 1) | |
| 1064 (find-alternate-file filename codesys)))) | |
| 1065 | |
| 1066 (defun find-alternate-file (filename &optional codesys) | |
| 1067 "Find file FILENAME, select its buffer, kill previous buffer. | |
| 1068 If the current buffer now contains an empty file that you just visited | |
| 771 | 1069 \(presumably by mistake), use this command to visit the file you really |
| 1070 want. Optional second argument specifies the coding system to use when | |
| 1071 decoding the file. Interactively, with a prefix argument, you will be | |
| 1072 prompted for the coding system." | |
| 428 | 1073 (interactive |
| 1074 (let ((file buffer-file-name) | |
| 1075 (file-name nil) | |
| 1076 (file-dir nil)) | |
| 1077 (and file | |
| 1078 (setq file-name (file-name-nondirectory file) | |
| 1079 file-dir (file-name-directory file))) | |
| 1080 (list (read-file-name | |
| 1081 "Find alternate file: " file-dir nil nil file-name) | |
| 771 | 1082 (if current-prefix-arg (read-coding-system "Coding-system: "))))) |
| 428 | 1083 (and (buffer-modified-p) (buffer-file-name) |
| 1084 ;; (not buffer-read-only) | |
| 1085 (not (yes-or-no-p (format | |
| 1086 "Buffer %s is modified; kill anyway? " | |
| 1087 (buffer-name)))) | |
| 1088 (error "Aborted")) | |
| 1089 (let ((obuf (current-buffer)) | |
| 1090 (ofile buffer-file-name) | |
| 1091 (onum buffer-file-number) | |
| 1092 (otrue buffer-file-truename) | |
| 1093 (oname (buffer-name))) | |
| 1094 (if (get-buffer " **lose**") | |
| 1095 (kill-buffer " **lose**")) | |
| 1096 (rename-buffer " **lose**") | |
| 1097 (setq buffer-file-name nil) | |
| 1098 (setq buffer-file-number nil) | |
| 1099 (setq buffer-file-truename nil) | |
| 1100 (unwind-protect | |
| 1101 (progn | |
| 1102 (unlock-buffer) | |
| 1103 (if codesys | |
| 1104 (let ((coding-system-for-read | |
| 1105 (get-coding-system codesys))) | |
| 1106 (find-file filename)) | |
| 1107 (find-file filename))) | |
| 1108 (cond ((eq obuf (current-buffer)) | |
| 1109 (setq buffer-file-name ofile) | |
| 1110 (setq buffer-file-number onum) | |
| 1111 (setq buffer-file-truename otrue) | |
| 1112 (lock-buffer) | |
| 1113 (rename-buffer oname)))) | |
| 1114 (or (eq (current-buffer) obuf) | |
| 1115 (kill-buffer obuf)))) | |
| 1333 | 1116 |
| 428 | 1117 (defun create-file-buffer (filename) |
| 1118 "Create a suitably named buffer for visiting FILENAME, and return it. | |
| 1119 FILENAME (sans directory) is used unchanged if that name is free; | |
| 1120 otherwise a string <2> or <3> or ... is appended to get an unused name." | |
| 1121 (let ((handler (find-file-name-handler filename 'create-file-buffer))) | |
| 1122 (if handler | |
| 1123 (funcall handler 'create-file-buffer filename) | |
| 1124 (let ((lastname (file-name-nondirectory filename))) | |
| 1125 (if (string= lastname "") | |
| 1126 (setq lastname filename)) | |
| 1127 (generate-new-buffer lastname))))) | |
| 1128 | |
| 1129 (defun generate-new-buffer (name) | |
| 1130 "Create and return a buffer with a name based on NAME. | |
| 1131 Choose the buffer's name using `generate-new-buffer-name'." | |
| 1132 (get-buffer-create (generate-new-buffer-name name))) | |
| 1133 | |
| 1134 (defvar abbreviated-home-dir nil | |
| 1135 "The user's homedir abbreviated according to `directory-abbrev-alist'.") | |
| 1136 | |
| 1137 (defun abbreviate-file-name (filename &optional hack-homedir) | |
| 1138 "Return a version of FILENAME shortened using `directory-abbrev-alist'. | |
| 1333 | 1139 Type \\[describe-variable] directory-abbrev-alist RET for more information. |
| 428 | 1140 If optional argument HACK-HOMEDIR is non-nil, then this also substitutes |
| 1141 \"~\" for the user's home directory." | |
| 1142 (let ((handler (find-file-name-handler filename 'abbreviate-file-name))) | |
| 1143 (if handler | |
| 1144 (funcall handler 'abbreviate-file-name filename hack-homedir) | |
| 1145 ;; Get rid of the prefixes added by the automounter. | |
| 1146 ;;(if (and (string-match automount-dir-prefix filename) | |
| 1147 ;; (file-exists-p (file-name-directory | |
| 1148 ;; (substring filename (1- (match-end 0)))))) | |
| 1149 ;; (setq filename (substring filename (1- (match-end 0))))) | |
| 1150 (let ((tail directory-abbrev-alist)) | |
| 1151 ;; If any elt of directory-abbrev-alist matches this name, | |
| 1152 ;; abbreviate accordingly. | |
| 1153 (while tail | |
| 1154 (when (string-match (car (car tail)) filename) | |
| 1155 (setq filename | |
| 1156 (concat (cdr (car tail)) (substring filename (match-end 0))))) | |
| 1157 (setq tail (cdr tail)))) | |
| 1158 (when hack-homedir | |
| 1159 ;; Compute and save the abbreviated homedir name. | |
| 440 | 1160 ;; We defer computing this until the first time it's needed, |
| 1161 ;; to give time for directory-abbrev-alist to be set properly. | |
| 1162 ;; We include the separator at the end, to avoid spurious | |
| 1163 ;; matches such as `/usr/foobar' when the home dir is | |
| 1164 ;; `/usr/foo'. | |
| 428 | 1165 (or abbreviated-home-dir |
| 1166 (setq abbreviated-home-dir | |
| 1167 (let ((abbreviated-home-dir "$foo")) | |
| 440 | 1168 (concat "\\`" |
| 1169 (regexp-quote | |
| 1170 (abbreviate-file-name (expand-file-name "~"))) | |
| 1171 "\\(" | |
| 1172 (regexp-quote (string directory-sep-char)) | |
| 1173 "\\|\\'\\)")))) | |
| 428 | 1174 ;; If FILENAME starts with the abbreviated homedir, |
| 1175 ;; make it start with `~' instead. | |
| 1176 (if (and (string-match abbreviated-home-dir filename) | |
| 1177 ;; If the home dir is just /, don't change it. | |
| 440 | 1178 (not (and (= (match-end 0) 1) |
| 1179 (= (aref filename 0) directory-sep-char))) | |
| 1180 (not (and (eq system-type 'windows-nt) | |
| 428 | 1181 (save-match-data |
| 440 | 1182 (string-match (concat "\\`[a-zA-Z]:" |
| 1183 (regexp-quote | |
| 1184 (string directory-sep-char)) | |
| 1185 "\\'") | |
| 1186 filename))))) | |
| 428 | 1187 (setq filename |
| 1188 (concat "~" | |
| 440 | 1189 (match-string 1 filename) |
| 428 | 1190 (substring filename (match-end 0)))))) |
| 1191 filename))) | |
| 1192 | |
| 1193 (defcustom find-file-not-true-dirname-list nil | |
| 1194 "*List of logical names for which visiting shouldn't save the true dirname." | |
| 1195 :type '(repeat (string :tag "Name")) | |
| 1196 :group 'find-file) | |
| 1197 | |
| 1198 ;; This function is needed by FSF vc.el. I hope somebody can make it | |
| 1199 ;; work for XEmacs. -sb. | |
| 1200 ;; #### In what way does it not work? --hniksic | |
| 1201 (defun find-buffer-visiting (filename) | |
| 1202 "Return the buffer visiting file FILENAME (a string). | |
| 1203 This is like `get-file-buffer', except that it checks for any buffer | |
| 1204 visiting the same file, possibly under a different name. | |
| 1205 If there is no such live buffer, return nil." | |
| 1206 (let ((buf (get-file-buffer filename)) | |
| 1207 (truename (abbreviate-file-name (file-truename filename)))) | |
| 1208 (or buf | |
| 1209 (let ((list (buffer-list)) found) | |
| 1210 (while (and (not found) list) | |
| 1211 (save-excursion | |
| 1212 (set-buffer (car list)) | |
| 1213 (if (and buffer-file-name | |
| 1214 (string= buffer-file-truename truename)) | |
| 1215 (setq found (car list)))) | |
| 1216 (setq list (cdr list))) | |
| 1217 found) | |
| 1333 | 1218 (let* ((attributes (file-attributes truename)) |
| 1219 (number (nthcdr 10 attributes)) | |
| 1220 (list (buffer-list)) found) | |
| 428 | 1221 (and buffer-file-numbers-unique |
| 1222 number | |
| 1223 (while (and (not found) list) | |
| 1333 | 1224 (with-current-buffer (car list) |
| 1225 (if (and buffer-file-name | |
| 1226 (equal buffer-file-number number) | |
| 428 | 1227 ;; Verify this buffer's file number |
| 1228 ;; still belongs to its file. | |
| 1229 (file-exists-p buffer-file-name) | |
| 1333 | 1230 (equal (file-attributes buffer-file-name) |
| 1231 attributes)) | |
| 428 | 1232 (setq found (car list)))) |
| 1233 (setq list (cdr list)))) | |
| 1234 found)))) | |
| 1333 | 1235 |
| 1236 (defcustom find-file-wildcards t | |
| 1237 "*Non-nil means file-visiting commands should handle wildcards. | |
| 1238 For example, if you specify `*.c', that would visit all the files | |
| 1239 whose names match the pattern." | |
| 1240 :group 'files | |
| 1241 ; :version "20.4" | |
| 1242 :type 'boolean) | |
| 1243 | |
| 1244 (defcustom find-file-suppress-same-file-warnings nil | |
| 1245 "*Non-nil means suppress warning messages for symlinked files. | |
| 1246 When nil, Emacs prints a warning when visiting a file that is already | |
| 1247 visited, but with a different name. Setting this option to t | |
| 1248 suppresses this warning." | |
| 1249 :group 'files | |
| 1250 ; :version "21.1" | |
| 1251 :type 'boolean) | |
| 1252 | |
| 1253 (defun find-file-noselect (filename &optional nowarn rawfile wildcards) | |
| 1254 "Read file FILENAME into a buffer and return the buffer. | |
| 1255 If a buffer exists visiting FILENAME, return that one, but | |
| 1256 verify that the file has not changed since visited or saved. | |
| 1257 The buffer is not selected, just returned to the caller. | |
| 1258 If NOWARN is non-nil, warning messages will be suppressed. | |
| 1259 If RAWFILE is non-nil, the file is read literally." | |
| 1260 (setq filename | |
| 1261 (abbreviate-file-name | |
| 1262 (expand-file-name filename))) | |
| 1263 (if (file-directory-p filename) | |
| 1264 (or (and find-file-run-dired | |
| 1265 (loop for fn in find-directory-functions | |
| 1266 for x = (and (fboundp fn) | |
| 1267 (funcall fn | |
| 1268 (if find-file-use-truenames | |
| 1269 (abbreviate-file-name | |
| 1270 (file-truename filename)) | |
| 1271 filename))) | |
| 1272 if x | |
| 1273 return x)) | |
| 1274 (error "%s is a directory" filename)) | |
| 1275 (if (and wildcards | |
| 1276 find-file-wildcards | |
| 1277 (not (string-match "\\`/:" filename)) | |
| 1278 (string-match "[[*?]" filename)) | |
| 1279 (let ((files (condition-case nil | |
| 1280 (file-expand-wildcards filename t) | |
| 1281 (error (list filename)))) | |
| 1282 (find-file-wildcards nil)) | |
| 1283 (if (null files) | |
| 1284 (find-file-noselect filename) | |
| 1285 (mapcar #'find-file-noselect files))) | |
| 1286 (let* ((buf (get-file-buffer filename)) | |
| 1287 (truename (abbreviate-file-name (file-truename filename))) | |
| 1288 (number (nthcdr 10 (file-attributes truename))) | |
| 1289 ; ;; Find any buffer for a file which has same truename. | |
| 1290 ; (other (and (not buf) (find-buffer-visiting filename))) | |
| 1346 | 1291 ) |
| 1333 | 1292 |
| 1293 ; ;; Let user know if there is a buffer with the same truename. | |
| 1294 ; (if other | |
| 1295 ; (progn | |
| 1296 ; (or nowarn | |
| 1297 ; find-file-suppress-same-file-warnings | |
| 1298 ; (string-equal filename (buffer-file-name other)) | |
| 1299 ; (message "%s and %s are the same file" | |
| 1300 ; filename (buffer-file-name other))) | |
| 1301 ; ;; Optionally also find that buffer. | |
| 1302 ; (if (or find-file-existing-other-name find-file-visit-truename) | |
| 1303 ; (setq buf other)))) | |
| 1304 | |
| 1305 (when (and buf | |
| 1306 (or find-file-compare-truenames find-file-use-truenames) | |
| 1307 (not find-file-suppress-same-file-warnings) | |
| 1308 (not nowarn)) | |
| 1309 (save-excursion | |
| 1310 (set-buffer buf) | |
| 1311 (if (not (string-equal buffer-file-name filename)) | |
| 1312 (message "%s and %s are the same file (%s)" | |
| 1313 filename buffer-file-name | |
| 1314 buffer-file-truename)))) | |
| 1315 | |
| 1316 (if buf | |
| 1317 (progn | |
| 1318 (or nowarn | |
| 1319 (verify-visited-file-modtime buf) | |
| 1320 (cond ((not (file-exists-p filename)) | |
| 1321 (error "File %s no longer exists!" filename)) | |
| 1322 ;; Certain files should be reverted automatically | |
| 1323 ;; if they have changed on disk and not in the buffer. | |
| 1324 ((and (not (buffer-modified-p buf)) | |
| 1325 (dolist (rx revert-without-query nil) | |
| 1326 (when (string-match rx filename) | |
| 1327 (return t)))) | |
| 1328 (with-current-buffer buf | |
| 1329 (message "Reverting file %s..." filename) | |
| 1330 (revert-buffer t t) | |
| 1331 (message "Reverting file %s... done" filename))) | |
| 1332 ((yes-or-no-p | |
| 1333 (if (string= (file-name-nondirectory filename) | |
| 1334 (buffer-name buf)) | |
| 1335 (format | |
| 1336 (if (buffer-modified-p buf) | |
| 1337 (gettext "File %s changed on disk. Discard your edits? ") | |
| 1338 (gettext "File %s changed on disk. Reread from disk? ")) | |
| 1339 (file-name-nondirectory filename)) | |
| 1340 (format | |
| 1341 (if (buffer-modified-p buf) | |
| 1342 (gettext "File %s changed on disk. Discard your edits in %s? ") | |
| 1343 (gettext "File %s changed on disk. Reread from disk into %s? ")) | |
| 1344 (file-name-nondirectory filename) | |
| 1345 (buffer-name buf)))) | |
| 1346 (with-current-buffer buf | |
| 1347 (revert-buffer t t))))) | |
| 1348 (when (not (eq rawfile (not (null find-file-literally)))) | |
| 1349 (with-current-buffer buf | |
| 1350 (if (buffer-modified-p) | |
| 1351 (if (y-or-n-p (if rawfile | |
| 1352 "Save file and revisit literally? " | |
| 1353 "Save file and revisit non-literally? ")) | |
| 1354 (progn | |
| 1355 (save-buffer) | |
| 1356 (find-file-noselect-1 buf filename nowarn | |
| 1357 rawfile truename number)) | |
| 1358 (if (y-or-n-p (if rawfile | |
| 1359 "Discard your edits and revisit file literally? " | |
| 1360 "Discard your edits and revisit file non-literally? ")) | |
| 1361 (find-file-noselect-1 buf filename nowarn | |
| 1362 rawfile truename number) | |
| 1363 (error (if rawfile "File already visited non-literally" | |
| 1364 "File already visited literally")))) | |
| 1365 (if (y-or-n-p (if rawfile | |
| 1366 "Revisit file literally? " | |
| 1367 "Revisit file non-literally? ")) | |
| 1368 (find-file-noselect-1 buf filename nowarn | |
| 1369 rawfile truename number) | |
| 1370 (error (if rawfile "File already visited non-literally" | |
| 1371 "File already visited literally")))))) | |
| 1372 ;; Return the buffer we are using. | |
| 1373 buf) | |
| 1374 ;; Create a new buffer. | |
| 1375 (setq buf (create-file-buffer filename)) | |
| 1376 ;; Catch various signals, such as QUIT, and kill the buffer | |
| 1377 ;; in that case. | |
| 1378 (condition-case data | |
| 1379 (progn | |
| 1380 (set-buffer-major-mode buf) | |
| 1381 ;; find-file-noselect-1 may use a different buffer. | |
| 1382 (find-file-noselect-1 buf filename nowarn | |
| 1383 rawfile truename number)) | |
| 1384 (t | |
| 1385 (kill-buffer buf) | |
| 1386 (signal (car data) (cdr data))))))))) | |
| 1387 | |
| 1388 (defun find-file-noselect-1 (buf filename nowarn rawfile truename number) | |
| 1389 (let ((inhibit-read-only t) | |
| 1390 error) | |
| 1391 (with-current-buffer buf | |
| 1392 (kill-local-variable 'find-file-literally) | |
| 1393 ;; Needed in case we are re-visiting the file with a different | |
| 1394 ;; text representation. | |
| 1395 (kill-local-variable 'buffer-file-coding-system) | |
| 1396 (erase-buffer) | |
| 1397 ; (and (default-value 'enable-multibyte-characters) | |
| 1398 ; (not rawfile) | |
| 1399 ; (set-buffer-multibyte t)) | |
| 1400 (condition-case () | |
| 1401 (if rawfile | |
| 1402 (insert-file-contents-literally filename t) | |
| 1403 (insert-file-contents filename t)) | |
| 1404 (file-error | |
| 1405 (when (and (file-exists-p filename) | |
| 1406 (not (file-readable-p filename))) | |
| 1407 (signal 'file-error (list "File is not readable" filename))) | |
| 1408 (if rawfile | |
| 1409 ;; Unconditionally set error | |
| 1410 (setq error t) | |
| 1411 (or | |
| 1412 ;; Run find-file-not-found-hooks until one returns non-nil. | |
| 1413 (run-hook-with-args-until-success 'find-file-not-found-hooks) | |
| 1414 ;; If they fail too, set error. | |
| 1415 (setq error t))))) | |
| 1416 ;; Find the file's truename, and maybe use that as visited name. | |
| 1417 ;; automatically computed in XEmacs, unless jka-compr was used! | |
| 1418 (unless buffer-file-truename | |
| 1419 (setq buffer-file-truename truename)) | |
| 1420 (setq buffer-file-number number) | |
| 1421 (and find-file-use-truenames | |
| 1422 ;; This should be in C. Put pathname | |
| 1423 ;; abbreviations that have been explicitly | |
| 1424 ;; requested back into the pathname. Most | |
| 1425 ;; importantly, strip out automounter /tmp_mnt | |
| 1426 ;; directories so that auto-save will work | |
| 1427 (setq buffer-file-name (abbreviate-file-name buffer-file-name))) | |
| 1428 ;; Set buffer's default directory to that of the file. | |
| 1429 (setq default-directory (file-name-directory buffer-file-name)) | |
| 1430 ;; Turn off backup files for certain file names. Since | |
| 1431 ;; this is a permanent local, the major mode won't eliminate it. | |
| 1432 (and (not (funcall backup-enable-predicate buffer-file-name)) | |
| 1433 (progn | |
| 1434 (make-local-variable 'backup-inhibited) | |
| 1435 (setq backup-inhibited t))) | |
| 1436 (if rawfile | |
| 1437 (progn | |
| 1438 (setq buffer-file-coding-system 'no-conversion) | |
| 1439 (make-local-variable 'find-file-literally) | |
| 1440 (setq find-file-literally t)) | |
| 1441 (after-find-file error (not nowarn)) | |
| 1442 (setq buf (current-buffer))) | |
| 1443 (current-buffer)))) | |
| 1444 | |
| 444 | 1445 (defun insert-file-contents-literally (filename &optional visit start end replace) |
| 1333 | 1446 "Like `insert-file-contents', but only reads in the file literally. |
| 1447 A buffer may be modified in several ways after reading into the buffer, | |
| 1448 due to Emacs features such as format decoding, character code | |
| 1449 conversion, `find-file-hooks', automatic uncompression, etc. | |
| 1450 | |
| 1451 This function ensures that none of these modifications will take place." | |
| 442 | 1452 (let ((wrap-func (find-file-name-handler filename |
| 1453 'insert-file-contents-literally))) | |
| 444 | 1454 (if wrap-func |
| 442 | 1455 (funcall wrap-func 'insert-file-contents-literally filename |
| 444 | 1456 visit start end replace) |
| 442 | 1457 (let ((file-name-handler-alist nil) |
| 1458 (format-alist nil) | |
| 1459 (after-insert-file-functions nil) | |
| 1460 (coding-system-for-read 'binary) | |
| 1461 (coding-system-for-write 'binary) | |
| 1462 (find-buffer-file-type-function | |
| 1463 (if (fboundp 'find-buffer-file-type) | |
| 1464 (symbol-function 'find-buffer-file-type) | |
| 1333 | 1465 nil)) |
| 1466 (inhibit-file-name-handlers '(jka-compr-handler image-file-handler)) | |
| 1467 (inhibit-file-name-operation 'insert-file-contents)) | |
| 442 | 1468 (unwind-protect |
| 1469 (progn | |
| 1470 (fset 'find-buffer-file-type (lambda (filename) t)) | |
| 444 | 1471 (insert-file-contents filename visit start end replace)) |
| 442 | 1472 (if find-buffer-file-type-function |
| 1473 (fset 'find-buffer-file-type find-buffer-file-type-function) | |
| 1474 (fmakunbound 'find-buffer-file-type))))))) | |
| 428 | 1475 |
| 1333 | 1476 (defun insert-file-literally (filename) |
| 1477 "Insert contents of file FILENAME into buffer after point with no conversion. | |
| 1478 | |
| 1479 This function is meant for the user to run interactively. | |
| 1480 Don't call it from programs! Use `insert-file-contents-literally' instead. | |
| 1481 \(Its calling sequence is different; see its documentation)." | |
| 1482 (interactive "*fInsert file literally: ") | |
| 428 | 1483 (if (file-directory-p filename) |
| 1333 | 1484 (signal 'file-error (list "Opening input file" "file is a directory" |
| 1485 filename))) | |
| 1486 (let ((tem (insert-file-contents-literally filename))) | |
| 1487 (push-mark (+ (point) (car (cdr tem)))))) | |
| 1488 | |
| 1489 (defvar find-file-literally nil | |
| 1490 "Non-nil if this buffer was made by `find-file-literally' or equivalent. | |
| 1491 This is a permanent local.") | |
| 1492 (put 'find-file-literally 'permanent-local t) | |
| 1493 | |
| 1494 (defun find-file-literally (filename) | |
| 1495 "Visit file FILENAME with no conversion of any kind. | |
| 1496 Format conversion and character code conversion are both disabled, | |
| 1497 and multibyte characters are disabled in the resulting buffer. | |
| 1498 The major mode used is Fundamental mode regardless of the file name, | |
| 1499 and local variable specifications in the file are ignored. | |
| 1500 Automatic uncompression and adding a newline at the end of the | |
| 1501 file due to `require-final-newline' is also disabled. | |
| 1502 | |
| 1503 You cannot absolutely rely on this function to result in | |
| 1504 visiting the file literally. If Emacs already has a buffer | |
| 1505 which is visiting the file, you get the existing buffer, | |
| 1506 regardless of whether it was created literally or not. | |
| 1507 | |
| 1508 In a Lisp program, if you want to be sure of accessing a file's | |
| 1509 contents literally, you should create a temporary buffer and then read | |
| 1510 the file contents into it using `insert-file-contents-literally'." | |
| 1511 (interactive "FFind file literally: ") | |
| 1512 (switch-to-buffer (find-file-noselect filename nil t))) | |
| 428 | 1513 |
| 1514 (defvar after-find-file-from-revert-buffer nil) | |
| 1515 | |
| 1516 (defun after-find-file (&optional error warn noauto | |
| 1517 after-find-file-from-revert-buffer | |
| 1518 nomodes) | |
| 1519 "Called after finding a file and by the default revert function. | |
| 1520 Sets buffer mode, parses local variables. | |
| 1521 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an | |
| 1522 error in reading the file. WARN non-nil means warn if there | |
| 1523 exists an auto-save file more recent than the visited file. | |
| 1524 NOAUTO means don't mess with auto-save mode. | |
| 1525 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil | |
| 1526 means this call was from `revert-buffer'. | |
| 1527 Fifth arg NOMODES non-nil means don't alter the file's modes. | |
| 1333 | 1528 Finishes by calling the functions in `find-file-hooks' |
| 1529 unless NOMODES is non-nil." | |
| 428 | 1530 (setq buffer-read-only (not (file-writable-p buffer-file-name))) |
| 1531 (if noninteractive | |
| 1532 nil | |
| 1533 (let* (not-serious | |
| 1534 (msg | |
| 1333 | 1535 (cond |
| 1536 ((not warn) nil) | |
| 1537 ((and error (file-attributes buffer-file-name)) | |
| 1538 (setq buffer-read-only t) | |
| 1539 (gettext "File exists, but cannot be read.")) | |
| 1540 ((not buffer-read-only) | |
| 1541 (if (and warn | |
| 1542 (file-newer-than-file-p (make-auto-save-file-name) | |
| 1543 buffer-file-name)) | |
| 1544 (format "%s has auto save data; consider M-x recover-file" | |
| 1545 (file-name-nondirectory buffer-file-name)) | |
| 1546 (setq not-serious t) | |
| 1547 (if error (gettext "(New file)") nil))) | |
| 1548 ((not error) | |
| 1549 (setq not-serious t) | |
| 1550 (gettext "Note: file is write protected")) | |
| 1551 ((file-attributes (directory-file-name default-directory)) | |
| 1552 (gettext "File not found and directory write-protected")) | |
| 1553 ((file-exists-p (file-name-directory buffer-file-name)) | |
| 1554 (setq buffer-read-only nil)) | |
| 1555 (t | |
| 1556 ;; If the directory the buffer is in doesn't exist, | |
| 1557 ;; offer to create it. It's better to do this now | |
| 1558 ;; than when we save the buffer, because we want | |
| 1559 ;; autosaving to work. | |
| 1560 (setq buffer-read-only nil) | |
| 1561 ;; XEmacs | |
| 1562 (or (file-exists-p (file-name-directory buffer-file-name)) | |
| 1563 (condition-case nil | |
| 1564 (if (yes-or-no-p | |
| 1565 (format | |
| 1566 "\ | |
| 428 | 1567 The directory containing %s does not exist. Create? " |
| 1333 | 1568 (abbreviate-file-name buffer-file-name))) |
| 1569 (make-directory (file-name-directory | |
| 1570 buffer-file-name) | |
| 1571 t)) | |
| 1572 (quit | |
| 1573 (kill-buffer (current-buffer)) | |
| 1574 (signal 'quit nil)))) | |
| 1575 nil)))) | |
| 428 | 1576 (if msg |
| 1577 (progn | |
| 1578 (message "%s" msg) | |
| 1579 (or not-serious (sit-for 1 t))))) | |
| 1333 | 1580 (when (and auto-save-default (not noauto)) |
| 428 | 1581 (auto-save-mode t))) |
| 1333 | 1582 ;; Make people do a little extra work (C-x C-q) |
| 1583 ;; before altering a backup file. | |
| 1584 (when (backup-file-name-p buffer-file-name) | |
| 1585 (setq buffer-read-only t)) | |
| 428 | 1586 (unless nomodes |
| 1333 | 1587 ;; #### No view-mode-disable. |
| 1588 ; (when view-read-only | |
| 1589 ; (and-boundp 'view-mode (view-mode-disable))) | |
| 428 | 1590 (normal-mode t) |
| 1333 | 1591 (when (and buffer-read-only |
| 1592 view-read-only | |
| 1593 (not (eq (get major-mode 'mode-class) 'special))) | |
| 1594 (view-mode)) | |
| 428 | 1595 (run-hooks 'find-file-hooks))) |
| 1596 | |
| 1597 (defun normal-mode (&optional find-file) | |
| 1598 "Choose the major mode for this buffer automatically. | |
| 1599 Also sets up any specified local variables of the file. | |
| 1600 Uses the visited file name, the -*- line, and the local variables spec. | |
| 1601 | |
| 1602 This function is called automatically from `find-file'. In that case, | |
| 1333 | 1603 we may set up the file-specified mode and local variables, |
| 1604 depending on the value of `enable-local-variables': if it is t, we do; | |
| 1605 if it is nil, we don't; otherwise, we query. | |
| 1606 In addition, if `local-enable-local-variables' is nil, we do | |
| 1607 not set local variables (though we do notice a mode specified with -*-.) | |
| 1608 | |
| 1609 `enable-local-variables' is ignored if you run `normal-mode' interactively, | |
| 1610 or from Lisp without specifying the optional argument FIND-FILE; | |
| 1611 in that case, this function acts as if `enable-local-variables' were t." | |
| 428 | 1612 (interactive) |
| 1613 (or find-file (funcall (or default-major-mode 'fundamental-mode))) | |
| 793 | 1614 (and (with-trapping-errors |
| 1615 :operation "File mode specification" | |
| 1616 :class 'file-mode-spec | |
| 1617 :error-form nil | |
| 1618 (set-auto-mode) | |
| 1619 t) | |
| 1620 (with-trapping-errors | |
| 1621 :operation "File local-variables" | |
| 1622 :class 'local-variables | |
| 1623 :error-form nil | |
| 1333 | 1624 ;; FSF 21.2: |
| 1625 ; (let ((enable-local-variables (or (not find-file) | |
| 1626 ; enable-local-variables))) | |
| 1627 ; (hack-local-variables)) | |
| 793 | 1628 (hack-local-variables (not find-file))))) |
| 428 | 1629 |
| 1333 | 1630 ;; END SYNC WITH FSF 21.2. |
| 1631 | |
| 1024 | 1632 ;; `auto-mode-alist' used to contain entries for modes in core and in packages. |
| 1633 ;; The applicable entries are now located in the corresponding modes in | |
| 1634 ;; packages, the ones here are for core modes. Ditto for | |
| 1635 ;; `interpreter-mode-alist' below. | |
| 1636 ;; Per Abrahamsen suggested splitting auto-mode-alist to | |
| 428 | 1637 ;; several distinct variables such as, in order of precedence, |
| 1638 ;; `user-auto-mode-alist' for users, `package-auto-mode-alist' for | |
| 1639 ;; packages and `auto-mode-alist' (which might also be called | |
| 1640 ;; `default-auto-mode-alist') for default stuff, such as some of the | |
| 1641 ;; entries below. | |
| 1642 | |
| 1643 (defvar auto-mode-alist | |
| 1644 '(("\\.te?xt\\'" . text-mode) | |
| 1645 ("\\.el\\'" . emacs-lisp-mode) | |
| 1646 ("\\.c?l\\(?:i?sp\\)?\\'" . lisp-mode) | |
| 1647 ("\\.article\\'" . text-mode) | |
| 1648 ("\\.letter\\'" . text-mode) | |
| 1649 ;; Mailer puts message to be edited in /tmp/Re.... or Message | |
| 1650 ;; #### Unix-specific! | |
| 1651 ("\\`/tmp/Re" . text-mode) | |
| 1652 ("/Message[0-9]*\\'" . text-mode) | |
| 1653 ;; some news reader is reported to use this | |
| 1654 ("^/tmp/fol/" . text-mode) | |
| 1655 ;; .emacs following a directory delimiter in either Unix or | |
| 1656 ;; Windows syntax. | |
| 1657 ("[/\\][._].*emacs\\'" . emacs-lisp-mode) | |
| 1658 ("\\.ml\\'" . lisp-mode) | |
| 1659 ) | |
| 1660 "Alist of filename patterns vs. corresponding major mode functions. | |
| 1661 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL). | |
| 1662 \(NON-NIL stands for anything that is not nil; the value does not matter.) | |
| 1663 Visiting a file whose name matches REGEXP specifies FUNCTION as the | |
| 1664 mode function to use. FUNCTION will be called, unless it is nil. | |
| 1665 | |
| 1666 If the element has the form (REGEXP FUNCTION NON-NIL), then after | |
| 1667 calling FUNCTION (if it's not nil), we delete the suffix that matched | |
| 1668 REGEXP and search the list again for another match.") | |
| 1669 | |
| 1670 (defvar interpreter-mode-alist | |
| 1024 | 1671 '(("emacs" . emacs-lisp-mode)) |
| 428 | 1672 "Alist mapping interpreter names to major modes. |
| 1673 This alist is used to guess the major mode of a file based on the | |
| 1674 contents of the first line. This line often contains something like: | |
| 1675 #!/bin/sh | |
| 1676 but may contain something more imaginative like | |
| 1677 #! /bin/env python | |
| 1678 or | |
| 1679 eval 'exec perl -w -S $0 ${1+\"$@\"}'. | |
| 1680 | |
| 1681 Each alist element looks like (INTERPRETER . MODE). | |
| 1682 The car of each element is a regular expression which is compared | |
| 1683 with the name of the interpreter specified in the first line. | |
| 1684 If it matches, mode MODE is selected.") | |
| 1685 | |
| 1686 (defvar binary-file-regexps | |
| 444 | 1687 '("\\.\\(?:bz2\\|elc\\|g\\(if\\|z\\)\\|jp\\(eg\\|g\\)\\|png\\|t\\(ar\\|gz\\|iff\\)\\|[Zo]\\)\\'") |
| 428 | 1688 "List of regexps of filenames containing binary (non-text) data.") |
| 1689 | |
| 1690 ; (eval-when-compile | |
| 1691 ; (require 'regexp-opt) | |
| 1692 ; (list | |
| 1693 ; (format "\\.\\(?:%s\\)\\'" | |
| 1694 ; (regexp-opt | |
| 1695 ; '("tar" | |
| 1696 ; "tgz" | |
| 1697 ; "gz" | |
| 1698 ; "bz2" | |
| 1699 ; "Z" | |
| 1700 ; "o" | |
| 1701 ; "elc" | |
| 1702 ; "png" | |
| 1703 ; "gif" | |
| 1704 ; "tiff" | |
| 1705 ; "jpg" | |
| 1706 ; "jpeg")))))) | |
| 444 | 1707 |
| 428 | 1708 (defvar inhibit-first-line-modes-regexps |
| 444 | 1709 binary-file-regexps |
| 428 | 1710 "List of regexps; if one matches a file name, don't look for `-*-'.") |
| 1711 | |
| 1712 (defvar inhibit-first-line-modes-suffixes nil | |
| 1713 "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'. | |
| 1714 When checking `inhibit-first-line-modes-regexps', we first discard | |
| 1715 from the end of the file name anything that matches one of these regexps.") | |
| 1716 | |
| 1333 | 1717 ;; Junk from FSF 21.2. Unnecessary in XEmacs, since `interpreter-mode-alist' |
| 1718 ;; can have regexps. | |
| 1719 ; (defvar auto-mode-interpreter-regexp | |
| 1720 ; "#![ \t]?\\([^ \t\n]*\ | |
| 1721 ; /bin/env[ \t]\\)?\\([^ \t\n]+\\)" | |
| 1722 ; "Regular expression matching interpreters, for file mode determination. | |
| 1723 ; This regular expression is matched against the first line of a file | |
| 1724 ; to determine the file's mode in `set-auto-mode' when Emacs can't deduce | |
| 1725 ; a mode from the file's name. If it matches, the file is assumed to | |
| 1726 ; be interpreted by the interpreter matched by the second group of the | |
| 1727 ; regular expression. The mode is then determined as the mode associated | |
| 1728 ; with that interpreter in `interpreter-mode-alist'.") | |
| 1729 | |
| 428 | 1730 (defvar user-init-file |
| 1731 nil ; set by command-line | |
| 1732 "File name including directory of user's initialization file.") | |
| 1733 | |
| 1734 (defun set-auto-mode (&optional just-from-file-name) | |
| 1735 "Select major mode appropriate for current buffer. | |
| 1736 This checks for a -*- mode tag in the buffer's text, | |
| 1737 compares the filename against the entries in `auto-mode-alist', | |
| 1738 or checks the interpreter that runs this file against | |
| 1739 `interpreter-mode-alist'. | |
| 1740 | |
| 1741 It does not check for the `mode:' local variable in the | |
| 1742 Local Variables section of the file; for that, use `hack-local-variables'. | |
| 1743 | |
| 1744 If `enable-local-variables' is nil, this function does not check for a | |
| 1745 -*- mode tag. | |
| 1746 | |
| 1747 If the optional argument JUST-FROM-FILE-NAME is non-nil, | |
| 1748 then we do not set anything but the major mode, | |
| 1749 and we don't even do that unless it would come from the file name." | |
| 1750 (save-excursion | |
| 1751 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- | |
| 1752 ;; Do this by calling the hack-local-variables helper to avoid redundancy. | |
| 1753 ;; We bind enable-local-variables to nil this time because we're going to | |
| 1754 ;; call hack-local-variables-prop-line again later, "for real." Note that | |
| 1755 ;; this temporary binding does not prevent hack-local-variables-prop-line | |
| 1756 ;; from setting the major mode. | |
| 1757 (or (and enable-local-variables | |
| 1758 (let ((enable-local-variables nil)) | |
| 1759 (hack-local-variables-prop-line nil)) | |
| 1760 ) | |
| 1761 ;; It's not in the -*- line, so check the auto-mode-alist, unless | |
| 1762 ;; this buffer isn't associated with a file. | |
| 1763 (null buffer-file-name) | |
| 1764 (let ((name (file-name-sans-versions buffer-file-name)) | |
| 1765 (keep-going t)) | |
| 1766 (while keep-going | |
| 1767 (setq keep-going nil) | |
| 1768 (let ((alist auto-mode-alist) | |
| 1769 (mode nil)) | |
| 440 | 1770 |
| 428 | 1771 ;; Find first matching alist entry. |
| 440 | 1772 |
| 1773 ;; #### This is incorrect. In NT, case sensitivity is a volume | |
| 1774 ;; property. For instance, NFS mounts *are* case sensitive. | |
| 1775 ;; Need internal function (file-name-case-sensitive f), F | |
| 1776 ;; being file or directory name. - kkm | |
| 428 | 1777 (let ((case-fold-search |
| 440 | 1778 (eq system-type 'windows-nt))) |
| 428 | 1779 (while (and (not mode) alist) |
| 1780 (if (string-match (car (car alist)) name) | |
| 1781 (if (and (consp (cdr (car alist))) | |
| 1782 (nth 2 (car alist))) | |
| 1783 (progn | |
| 1784 (setq mode (car (cdr (car alist))) | |
| 1785 name (substring name 0 (match-beginning 0)) | |
| 1786 keep-going t)) | |
| 1787 (setq mode (cdr (car alist)) | |
| 1788 keep-going nil))) | |
| 1789 (setq alist (cdr alist)))) | |
| 1790 (unless just-from-file-name | |
| 1791 ;; If we can't deduce a mode from the file name, | |
| 1792 ;; look for an interpreter specified in the first line. | |
| 1793 (if (and (null mode) | |
| 1794 (save-excursion ; XEmacs | |
| 1795 (goto-char (point-min)) | |
| 1796 (looking-at "#!"))) | |
| 1797 (let ((firstline | |
| 1798 (buffer-substring | |
| 1799 (point-min) | |
| 1800 (save-excursion | |
| 1801 (goto-char (point-min)) (end-of-line) (point))))) | |
| 1802 (setq alist interpreter-mode-alist) | |
| 1803 (while alist | |
| 1804 (if (string-match (car (car alist)) firstline) | |
| 1805 (progn | |
| 1806 (setq mode (cdr (car alist))) | |
| 1807 (setq alist nil)) | |
| 1808 (setq alist (cdr alist))))))) | |
| 1809 (if mode | |
| 1810 (if (not (fboundp mode)) | |
| 1811 (let ((name (package-get-package-provider mode))) | |
| 1812 (if name | |
| 1813 (message "Mode %s is not installed. Download package %s" mode name) | |
| 1814 (message "Mode %s either doesn't exist or is not a known package" mode)) | |
| 1815 (sit-for 2) | |
| 1816 (error "%s" mode)) | |
| 1817 (unless (and just-from-file-name | |
| 1818 (or | |
| 1819 ;; Don't reinvoke major mode. | |
| 1820 (eq mode major-mode) | |
| 1821 ;; Don't lose on minor modes. | |
| 1822 (assq mode minor-mode-alist))) | |
| 1823 (funcall mode)))))))))) | |
| 1824 | |
| 1825 (defvar hack-local-variables-hook nil | |
| 1826 "Normal hook run after processing a file's local variables specs. | |
| 1827 Major modes can use this to examine user-specified local variables | |
| 1828 in order to initialize other data structure based on them. | |
| 1829 | |
| 1830 This hook runs even if there were no local variables or if their | |
| 1831 evaluation was suppressed. See also `enable-local-variables' and | |
| 1832 `enable-local-eval'.") | |
| 1833 | |
| 1834 (defun hack-local-variables (&optional force) | |
| 1835 "Parse, and bind or evaluate as appropriate, any local variables | |
| 1836 for current buffer." | |
| 1837 ;; Don't look for -*- if this file name matches any | |
| 1838 ;; of the regexps in inhibit-first-line-modes-regexps. | |
| 1839 (if (or (null buffer-file-name) ; don't lose if buffer has no file! | |
| 1840 (not (let ((temp inhibit-first-line-modes-regexps) | |
| 1841 (name (if buffer-file-name | |
| 1842 (file-name-sans-versions buffer-file-name) | |
| 1843 (buffer-name)))) | |
| 1844 (while (let ((sufs inhibit-first-line-modes-suffixes)) | |
| 1845 (while (and sufs (not | |
| 1846 (string-match (car sufs) name))) | |
| 1847 (setq sufs (cdr sufs))) | |
| 1848 sufs) | |
| 1849 (setq name (substring name 0 (match-beginning 0)))) | |
| 1850 (while (and temp | |
| 1851 (not (string-match (car temp) name))) | |
| 1852 (setq temp (cdr temp)) | |
| 1853 temp)))) | |
| 1854 (progn | |
| 1855 ;; Look for variables in the -*- line. | |
| 1856 (hack-local-variables-prop-line force) | |
| 1857 ;; Look for "Local variables:" block in last page. | |
| 1858 (hack-local-variables-last-page force))) | |
| 1859 (run-hooks 'hack-local-variables-hook)) | |
| 1860 | |
| 1861 ;;; Local variables may be specified in the last page of the file (within 3k | |
| 1862 ;;; from the end of the file and after the last ^L) in the form | |
| 1863 ;;; | |
| 1864 ;;; Local variables: | |
| 1865 ;;; variable-name: variable-value | |
| 1866 ;;; end: | |
| 1867 ;;; | |
| 1868 ;;; The lines may begin with a common prefix, like ";;; " in the above | |
| 1869 ;;; example. They may also have a common suffix (" */" for example). In | |
| 1870 ;;; this form, the local variable "mode" can be used to change the major | |
| 1871 ;;; mode, and the local variable "eval" can be used to evaluate an arbitrary | |
| 1872 ;;; form. | |
| 1873 ;;; | |
| 1874 ;;; Local variables may also be specified in the first line of the file. | |
| 1875 ;;; Embedded in this line are a pair of "-*-" sequences. What lies between | |
| 1876 ;;; them are variable-name/variable-value pairs, like: | |
| 1877 ;;; | |
| 1878 ;;; -*- mode: emacs-lisp -*- | |
| 1879 ;;; or -*- mode: postscript; version-control: never -*- | |
| 1880 ;;; or -*- tags-file-name: "/foo/bar/TAGS" -*- | |
| 1881 ;;; | |
| 1882 ;;; The local variable "eval" is not used with this form. For hysterical | |
| 1883 ;;; reasons, the syntax "-*- modename -*-" is allowed as well. | |
| 1884 ;;; | |
| 1885 | |
| 1886 (defun hack-local-variables-p (modeline) | |
| 1887 (or (eq enable-local-variables t) | |
| 1888 (and enable-local-variables | |
| 1889 (save-window-excursion | |
| 1890 (condition-case nil | |
| 1891 (switch-to-buffer (current-buffer)) | |
| 1892 (error | |
| 1893 ;; If we fail to switch in the selected window, | |
| 1894 ;; it is probably a minibuffer. | |
| 1895 ;; So try another window. | |
| 1896 (condition-case nil | |
| 1897 (switch-to-buffer-other-window (current-buffer)) | |
| 1898 (error | |
| 1899 (switch-to-buffer-other-frame (current-buffer)))))) | |
| 1900 (or modeline (save-excursion | |
| 1901 (beginning-of-line) | |
| 1902 (set-window-start (selected-window) (point)))) | |
| 1903 (y-or-n-p (format | |
| 1904 "Set local variables as specified %s of %s? " | |
| 1905 (if modeline "in -*- line" "at end") | |
| 1906 (if buffer-file-name | |
| 1907 (file-name-nondirectory buffer-file-name) | |
| 1908 (concat "buffer " (buffer-name))))))))) | |
| 1909 | |
| 1910 (defun hack-local-variables-last-page (&optional force) | |
| 1911 ;; Set local variables set in the "Local Variables:" block of the last page. | |
| 1912 (save-excursion | |
| 1913 (goto-char (point-max)) | |
| 1914 (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) | |
| 1915 (if (let ((case-fold-search t)) | |
| 1916 (and (search-forward "Local Variables:" nil t) | |
| 1917 (or force | |
| 1918 (hack-local-variables-p nil)))) | |
| 1919 (let ((continue t) | |
| 444 | 1920 prefix prefixlen suffix start |
| 428 | 1921 (enable-local-eval enable-local-eval)) |
| 1922 ;; The prefix is what comes before "local variables:" in its line. | |
| 1923 ;; The suffix is what comes after "local variables:" in its line. | |
| 1924 (skip-chars-forward " \t") | |
| 1925 (or (eolp) | |
| 1926 (setq suffix (buffer-substring (point) | |
| 1927 (progn (end-of-line) (point))))) | |
| 1928 (goto-char (match-beginning 0)) | |
| 1929 (or (bolp) | |
| 1930 (setq prefix | |
| 1931 (buffer-substring (point) | |
| 1932 (progn (beginning-of-line) (point))))) | |
| 1933 (if prefix (setq prefixlen (length prefix) | |
| 1934 prefix (regexp-quote prefix))) | |
| 1935 (if suffix (setq suffix (concat (regexp-quote suffix) "$"))) | |
| 1936 (while continue | |
| 1937 ;; Look at next local variable spec. | |
| 1938 (if selective-display (re-search-forward "[\n\C-m]") | |
| 1939 (forward-line 1)) | |
| 1940 ;; Skip the prefix, if any. | |
| 1941 (if prefix | |
| 1942 (if (looking-at prefix) | |
| 1943 (forward-char prefixlen) | |
| 1944 (error "Local variables entry is missing the prefix"))) | |
| 1945 ;; Find the variable name; strip whitespace. | |
| 1946 (skip-chars-forward " \t") | |
| 444 | 1947 (setq start (point)) |
| 428 | 1948 (skip-chars-forward "^:\n") |
| 1949 (if (eolp) (error "Missing colon in local variables entry")) | |
| 1950 (skip-chars-backward " \t") | |
| 444 | 1951 (let* ((str (buffer-substring start (point))) |
| 428 | 1952 (var (read str)) |
| 1953 val) | |
| 1954 ;; Setting variable named "end" means end of list. | |
| 801 | 1955 (if (equalp str "end") |
| 428 | 1956 (setq continue nil) |
| 1957 ;; Otherwise read the variable value. | |
| 1958 (skip-chars-forward "^:") | |
| 1959 (forward-char 1) | |
| 1960 (setq val (read (current-buffer))) | |
| 1961 (skip-chars-backward "\n") | |
| 1962 (skip-chars-forward " \t") | |
| 1963 (or (if suffix (looking-at suffix) (eolp)) | |
| 1964 (error "Local variables entry is terminated incorrectly")) | |
| 1965 ;; Set the variable. "Variables" mode and eval are funny. | |
| 1966 (hack-one-local-variable var val)))))))) | |
| 1967 | |
| 1968 ;; jwz - New Version 20.1/19.15 | |
| 1969 (defun hack-local-variables-prop-line (&optional force) | |
| 1970 ;; Set local variables specified in the -*- line. | |
| 1971 ;; Returns t if mode was set. | |
| 1972 (let ((result nil)) | |
| 1973 (save-excursion | |
| 1974 (goto-char (point-min)) | |
| 1975 (skip-chars-forward " \t\n\r") | |
| 1976 (let ((end (save-excursion | |
| 1977 ;; If the file begins with "#!" | |
| 1978 ;; (un*x exec interpreter magic), look | |
| 1979 ;; for mode frobs in the first two | |
| 1980 ;; lines. You cannot necessarily | |
| 1981 ;; put them in the first line of | |
| 1982 ;; such a file without screwing up | |
| 1983 ;; the interpreter invocation. | |
| 1984 (end-of-line (and (looking-at "^#!") 2)) | |
| 1985 (point)))) | |
| 1986 ;; Parse the -*- line into the `result' alist. | |
| 1987 (cond ((not (search-forward "-*-" end t)) | |
| 1988 ;; doesn't have one. | |
| 1989 (setq force t)) | |
| 442 | 1990 ((looking-at "[ \t]*\\([^ \t\n\r:;]+?\\)\\([ \t]*-\\*-\\)") |
| 428 | 1991 ;; Antiquated form: "-*- ModeName -*-". |
| 1992 (setq result | |
| 1993 (list (cons 'mode | |
| 1994 (intern (buffer-substring | |
| 1995 (match-beginning 1) | |
| 1996 (match-end 1))))) | |
| 1997 )) | |
| 1998 (t | |
| 1999 ;; Usual form: '-*-' [ <variable> ':' <value> ';' ]* '-*-' | |
| 2000 ;; (last ";" is optional). | |
| 2001 (save-excursion | |
| 2002 (if (search-forward "-*-" end t) | |
| 2003 (setq end (- (point) 3)) | |
| 2004 (error "-*- not terminated before end of line"))) | |
| 2005 (while (< (point) end) | |
| 2006 (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*") | |
| 2007 (error "malformed -*- line")) | |
| 2008 (goto-char (match-end 0)) | |
| 2009 ;; There used to be a downcase here, | |
| 2010 ;; but the manual didn't say so, | |
| 2011 ;; and people want to set var names that aren't all lc. | |
| 2012 (let ((key (intern (buffer-substring | |
| 2013 (match-beginning 1) | |
| 2014 (match-end 1)))) | |
| 2015 (val (save-restriction | |
| 2016 (narrow-to-region (point) end) | |
| 2017 (read (current-buffer))))) | |
| 2018 ;; Case sensitivity! Icepicks in my forehead! | |
| 801 | 2019 (if (equalp (symbol-name key) "mode") |
| 428 | 2020 (setq key 'mode)) |
| 2021 (setq result (cons (cons key val) result)) | |
| 2022 (skip-chars-forward " \t;"))) | |
| 2023 (setq result (nreverse result)))))) | |
| 2024 | |
| 2025 (let ((set-any-p (or force | |
| 2026 ;; It's OK to force null specifications. | |
| 2027 (null result) | |
| 2028 ;; It's OK to force mode-only specifications. | |
| 2029 (let ((remaining result) | |
| 2030 (mode-specs-only t)) | |
| 2031 (while remaining | |
| 2032 (if (eq (car (car remaining)) 'mode) | |
| 2033 (setq remaining (cdr remaining)) | |
| 2034 ;; Otherwise, we have a real local. | |
| 2035 (setq mode-specs-only nil | |
| 2036 remaining nil)) | |
| 2037 ) | |
| 2038 mode-specs-only) | |
| 2039 ;; Otherwise, check. | |
| 2040 (hack-local-variables-p t))) | |
| 2041 (mode-p nil)) | |
| 2042 (while result | |
| 2043 (let ((key (car (car result))) | |
| 2044 (val (cdr (car result)))) | |
| 2045 (cond ((eq key 'mode) | |
| 2046 (setq mode-p t) | |
| 2047 (let ((mode (intern (concat (downcase (symbol-name val)) | |
| 2048 "-mode")))) | |
| 2049 ;; Without this guard, `normal-mode' would potentially run | |
| 2050 ;; the major mode function twice: once via `set-auto-mode' | |
| 2051 ;; and once via `hack-local-variables'. | |
| 2052 (if (not (eq mode major-mode)) | |
| 2053 (funcall mode)) | |
| 2054 )) | |
| 2055 (set-any-p | |
| 2056 (hack-one-local-variable key val)) | |
| 2057 (t | |
| 2058 nil))) | |
| 2059 (setq result (cdr result))) | |
| 2060 mode-p))) | |
| 2061 | |
| 1333 | 2062 ;; BEGIN SYNC WITH FSF 21.2. |
| 2063 | |
| 428 | 2064 (defconst ignored-local-variables |
| 2065 (list 'enable-local-eval) | |
| 2066 "Variables to be ignored in a file's local variable spec.") | |
| 2067 | |
| 2068 ;; Get confirmation before setting these variables as locals in a file. | |
| 2069 (put 'debugger 'risky-local-variable t) | |
| 2070 (put 'enable-local-eval 'risky-local-variable t) | |
| 2071 (put 'ignored-local-variables 'risky-local-variable t) | |
| 2072 (put 'eval 'risky-local-variable t) | |
| 2073 (put 'file-name-handler-alist 'risky-local-variable t) | |
| 2074 (put 'minor-mode-map-alist 'risky-local-variable t) | |
| 2075 (put 'after-load-alist 'risky-local-variable t) | |
| 2076 (put 'buffer-file-name 'risky-local-variable t) | |
| 2077 (put 'buffer-auto-save-file-name 'risky-local-variable t) | |
| 2078 (put 'buffer-file-truename 'risky-local-variable t) | |
| 2079 (put 'exec-path 'risky-local-variable t) | |
| 2080 (put 'load-path 'risky-local-variable t) | |
| 2081 (put 'exec-directory 'risky-local-variable t) | |
| 2082 (put 'process-environment 'risky-local-variable t) | |
| 1333 | 2083 (put 'dabbrev-case-fold-search 'risky-local-variable t) |
| 2084 (put 'dabbrev-case-replace 'risky-local-variable t) | |
| 428 | 2085 ;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode. |
| 2086 (put 'outline-level 'risky-local-variable t) | |
| 2087 (put 'rmail-output-file-alist 'risky-local-variable t) | |
| 2088 | |
| 2089 ;; This one is safe because the user gets to check it before it is used. | |
| 2090 (put 'compile-command 'safe-local-variable t) | |
| 2091 | |
| 1333 | 2092 (defun hack-one-local-variable-quotep (exp) |
| 2093 (and (consp exp) (eq (car exp) 'quote) (consp (cdr exp)))) | |
| 2094 | |
| 428 | 2095 (defun hack-one-local-variable (var val) |
| 1333 | 2096 "\"Set\" one variable in a local variables spec. |
| 2097 A few variable names are treated specially." | |
| 428 | 2098 (cond ((eq var 'mode) |
| 2099 (funcall (intern (concat (downcase (symbol-name val)) | |
| 2100 "-mode")))) | |
| 1333 | 2101 ((eq var 'coding) |
| 2102 ;; We have already handled coding: tag in set-auto-coding. | |
| 2103 nil) | |
| 428 | 2104 ((memq var ignored-local-variables) |
| 2105 nil) | |
| 2106 ;; "Setting" eval means either eval it or do nothing. | |
| 2107 ;; Likewise for setting hook variables. | |
| 2108 ((or (get var 'risky-local-variable) | |
| 2109 (and | |
| 1333 | 2110 (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$\\|-predicate$" |
| 428 | 2111 (symbol-name var)) |
| 2112 (not (get var 'safe-local-variable)))) | |
| 1333 | 2113 ;; Permit evalling a put of a harmless property. |
| 2114 ;; if the args do nothing tricky. | |
| 2115 (if (or (and (eq var 'eval) | |
| 2116 (consp val) | |
| 2117 (eq (car val) 'put) | |
| 2118 (hack-one-local-variable-quotep (nth 1 val)) | |
| 2119 (hack-one-local-variable-quotep (nth 2 val)) | |
| 2120 ;; Only allow safe values of lisp-indent-hook; | |
| 2121 ;; not functions. | |
| 2122 (or (numberp (nth 3 val)) | |
| 2123 (equal (nth 3 val) ''defun)) | |
| 2124 (memq (nth 1 (nth 2 val)) | |
| 2125 '(lisp-indent-hook))) | |
| 2126 ;; Permit eval if not root and user says ok. | |
| 2127 (and (not (zerop (user-uid))) | |
| 2128 (or (eq enable-local-eval t) | |
| 2129 (and enable-local-eval | |
| 2130 (save-window-excursion | |
| 2131 (switch-to-buffer (current-buffer)) | |
| 2132 (save-excursion | |
| 2133 (beginning-of-line) | |
| 2134 (set-window-start (selected-window) (point))) | |
| 2135 (setq enable-local-eval | |
| 2136 (y-or-n-p (format "Process `eval' or hook local variables in %s? " | |
| 2137 (if buffer-file-name | |
| 2138 (concat "file " (file-name-nondirectory buffer-file-name)) | |
| 2139 (concat "buffer " (buffer-name))))))))))) | |
| 428 | 2140 (if (eq var 'eval) |
| 2141 (save-excursion (eval val)) | |
| 2142 (make-local-variable var) | |
| 2143 (set var val)) | |
| 1333 | 2144 (message "Ignoring `eval:' in the local variables list"))) |
| 428 | 2145 ;; Ordinary variable, really set it. |
| 2146 (t (make-local-variable var) | |
| 2147 (set var val)))) | |
| 502 | 2148 |
| 2149 (defun find-coding-system-magic-cookie-in-file (file) | |
| 2150 "Look for the coding-system magic cookie in FILE. | |
| 2151 The coding-system magic cookie is either the local variable specification | |
| 2152 -*- ... coding: ... -*- on the first line, or the exact string | |
| 2153 \";;;###coding system: \" somewhere within the first 3000 characters | |
| 2154 of the file. If found, the coding system name (as a string) is returned; | |
| 2155 otherwise nil is returned. Note that it is extremely unlikely that | |
| 2156 either such string would occur coincidentally as the result of encoding | |
| 2157 some characters in a non-ASCII charset, and that the spaces make it | |
| 2158 even less likely since the space character is not a valid octet in any | |
| 2159 ISO 2022 encoding of most non-ASCII charsets." | |
| 2160 (save-excursion | |
| 2161 (with-temp-buffer | |
| 2162 (let ((coding-system-for-read 'raw-text)) | |
| 2434 | 2163 (insert-file-contents file nil 0 3000)) |
| 502 | 2164 (goto-char (point-min)) |
| 2165 (or (and (looking-at | |
| 2166 "^[^\n]*-\\*-[^\n]*coding: \\([^ \t\n;]+\\)[^\n]*-\\*-") | |
| 2167 (buffer-substring (match-beginning 1) (match-end 1))) | |
| 2168 ;; (save-excursion | |
| 2169 ;; (let (start end) | |
| 2170 ;; (and (re-search-forward "^;+[ \t]*Local Variables:" nil t) | |
| 2171 ;; (setq start (match-end 0)) | |
| 2172 ;; (re-search-forward "\n;+[ \t]*End:") | |
| 2173 ;; (setq end (match-beginning 0)) | |
| 2174 ;; (save-restriction | |
| 2175 ;; (narrow-to-region start end) | |
| 2176 ;; (goto-char start) | |
| 2177 ;; (re-search-forward "^;;; coding: \\([^\n]+\\)$" nil t) | |
| 2178 ;; ) | |
| 2179 ;; (let ((codesys | |
| 2180 ;; (intern (buffer-substring | |
| 2181 ;; (match-beginning 1)(match-end 1))))) | |
| 2182 ;; (if (find-coding-system codesys) codesys)) | |
| 2183 ;; ))) | |
| 2184 (let ((case-fold-search nil)) | |
| 2185 (if (search-forward | |
| 2186 ";;;###coding system: " (+ (point-min) 3000) t) | |
| 2187 (let ((start (point)) | |
| 2188 (end (progn | |
| 2189 (skip-chars-forward "^ \t\n\r") | |
| 2190 (point)))) | |
| 2191 (if (> end start) (buffer-substring start end)) | |
| 2192 ))) | |
| 2193 )))) | |
| 428 | 2194 |
| 1333 | 2195 |
| 428 | 2196 (defcustom change-major-mode-with-file-name t |
| 2197 "*Non-nil means \\[write-file] should set the major mode from the file name. | |
| 2198 However, the mode will not be changed if | |
| 2199 \(1) a local variables list or the `-*-' line specifies a major mode, or | |
| 2200 \(2) the current major mode is a \"special\" mode, | |
| 2201 \ not suitable for ordinary files, or | |
| 2202 \(3) the new file name does not particularly specify any mode." | |
| 2203 :type 'boolean | |
| 2204 :group 'editing-basics) | |
| 2205 | |
| 2206 (defun set-visited-file-name (filename &optional no-query along-with-file) | |
| 2207 "Change name of file visited in current buffer to FILENAME. | |
| 2208 The next time the buffer is saved it will go in the newly specified file. | |
| 2209 nil or empty string as argument means make buffer not be visiting any file. | |
| 2210 Remember to delete the initial contents of the minibuffer | |
| 2211 if you wish to pass an empty string as the argument. | |
| 2212 | |
| 2213 The optional second argument NO-QUERY, if non-nil, inhibits asking for | |
| 2214 confirmation in the case where another buffer is already visiting FILENAME. | |
| 2215 | |
| 2216 The optional third argument ALONG-WITH-FILE, if non-nil, means that | |
| 2217 the old visited file has been renamed to the new name FILENAME." | |
| 2218 (interactive "FSet visited file name: ") | |
| 2219 (if (buffer-base-buffer) | |
| 2220 (error "An indirect buffer cannot visit a file")) | |
| 2221 (let (truename) | |
| 2222 (if filename | |
| 2223 (setq filename | |
| 2224 (if (string-equal filename "") | |
| 2225 nil | |
| 2226 (expand-file-name filename)))) | |
| 2227 (if filename | |
| 2228 (progn | |
| 2229 (setq truename (file-truename filename)) | |
| 2230 ;; #### Do we need to check if truename is non-nil? | |
| 2231 (if find-file-use-truenames | |
| 2232 (setq filename truename)))) | |
| 2233 (let ((buffer (and filename (find-buffer-visiting filename)))) | |
| 2234 (and buffer (not (eq buffer (current-buffer))) | |
| 2235 (not no-query) | |
| 2236 (not (y-or-n-p (message "A buffer is visiting %s; proceed? " | |
| 2237 filename))) | |
| 2238 (error "Aborted"))) | |
| 2239 (or (equal filename buffer-file-name) | |
| 2240 (progn | |
| 2241 (and filename (lock-buffer filename)) | |
| 2242 (unlock-buffer))) | |
| 2243 (setq buffer-file-name filename) | |
| 2244 (if filename ; make buffer name reflect filename. | |
| 2245 (let ((new-name (file-name-nondirectory buffer-file-name))) | |
| 2246 (if (string= new-name "") | |
| 2247 (error "Empty file name")) | |
| 2248 (setq default-directory (file-name-directory buffer-file-name)) | |
| 2249 (or (string= new-name (buffer-name)) | |
| 2250 (rename-buffer new-name t)))) | |
| 2251 (setq buffer-backed-up nil) | |
| 2252 (or along-with-file | |
| 2253 (clear-visited-file-modtime)) | |
| 2254 (compute-buffer-file-truename) ; insert-file-contents does this too. | |
| 2255 ; ;; Abbreviate the file names of the buffer. | |
| 2256 ; (if truename | |
| 2257 ; (progn | |
| 2258 ; (setq buffer-file-truename (abbreviate-file-name truename)) | |
| 2259 ; (if find-file-visit-truename | |
| 2260 ; (setq buffer-file-name buffer-file-truename)))) | |
| 2261 (setq buffer-file-number | |
| 2262 (if filename | |
| 2263 (nthcdr 10 (file-attributes buffer-file-name)) | |
| 2264 nil))) | |
| 2265 ;; write-file-hooks is normally used for things like ftp-find-file | |
| 2266 ;; that visit things that are not local files as if they were files. | |
| 2267 ;; Changing to visit an ordinary local file instead should flush the hook. | |
| 2268 (kill-local-variable 'write-file-hooks) | |
| 2269 (kill-local-variable 'after-save-hook) | |
| 2270 (kill-local-variable 'local-write-file-hooks) | |
| 2271 (kill-local-variable 'write-file-data-hooks) | |
| 2272 (kill-local-variable 'revert-buffer-function) | |
| 2273 (kill-local-variable 'backup-inhibited) | |
| 2274 ;; If buffer was read-only because of version control, | |
| 2275 ;; that reason is gone now, so make it writable. | |
| 502 | 2276 (if-boundp 'vc-mode |
| 2277 (progn | |
| 2278 (if vc-mode | |
| 2279 (setq buffer-read-only nil)) | |
| 2280 (kill-local-variable 'vc-mode))) | |
| 428 | 2281 ;; Turn off backup files for certain file names. |
| 2282 ;; Since this is a permanent local, the major mode won't eliminate it. | |
| 2283 (and buffer-file-name | |
| 2284 (not (funcall backup-enable-predicate buffer-file-name)) | |
| 2285 (progn | |
| 2286 (make-local-variable 'backup-inhibited) | |
| 2287 (setq backup-inhibited t))) | |
| 2288 (let ((oauto buffer-auto-save-file-name)) | |
| 2289 ;; If auto-save was not already on, turn it on if appropriate. | |
| 2290 (if (not buffer-auto-save-file-name) | |
| 2291 (and buffer-file-name auto-save-default | |
| 2292 (auto-save-mode t)) | |
| 2293 ;; If auto save is on, start using a new name. | |
| 2294 ;; We deliberately don't rename or delete the old auto save | |
| 2295 ;; for the old visited file name. This is because perhaps | |
| 2296 ;; the user wants to save the new state and then compare with the | |
| 2297 ;; previous state from the auto save file. | |
| 2298 (setq buffer-auto-save-file-name | |
| 2299 (make-auto-save-file-name))) | |
| 2300 ;; Rename the old auto save file if any. | |
| 2301 (and oauto buffer-auto-save-file-name | |
| 2302 (file-exists-p oauto) | |
| 2303 (rename-file oauto buffer-auto-save-file-name t))) | |
| 2304 (if buffer-file-name | |
| 2305 (not along-with-file) | |
| 2306 (set-buffer-modified-p t)) | |
| 2307 ;; Update the major mode, if the file name determines it. | |
| 2308 (condition-case nil | |
| 2309 ;; Don't change the mode if it is special. | |
| 2310 (or (not change-major-mode-with-file-name) | |
| 2311 (get major-mode 'mode-class) | |
| 2312 ;; Don't change the mode if the local variable list specifies it. | |
| 2313 (hack-local-variables t) | |
| 2314 (set-auto-mode t)) | |
| 2315 (error nil)) | |
| 1333 | 2316 ;; #### ?? not in FSF. |
| 428 | 2317 (run-hooks 'after-set-visited-file-name-hooks)) |
| 2318 | |
| 2319 (defun write-file (filename &optional confirm codesys) | |
| 2320 "Write current buffer into file FILENAME. | |
| 1333 | 2321 This makes the buffer visit that file, and marks it as not modified. |
| 2322 | |
| 2323 If you specify just a directory name as FILENAME, that means to use | |
| 2324 the default file name but in that directory. You can also yank | |
| 2325 the default file name into the minibuffer to edit it, using M-n. | |
| 2326 | |
| 2327 If the buffer is not already visiting a file, the default file name | |
| 2328 for the output file is the buffer name. | |
| 2329 | |
| 2330 If optional second arg CONFIRM is non-nil, this function | |
| 2331 asks for confirmation before overwriting an existing file. | |
| 2332 Interactively, this is always the case. | |
| 771 | 2333 |
| 2334 Optional third argument specifies the coding system to use when encoding | |
| 2335 the file. Interactively, with a prefix argument, you will be prompted for | |
| 2336 the coding system." | |
| 428 | 2337 ;; (interactive "FWrite file: ") |
| 2338 (interactive | |
| 2339 (list (if buffer-file-name | |
| 2340 (read-file-name "Write file: " | |
| 2341 nil nil nil nil) | |
| 1333 | 2342 (read-file-name "Write file: " default-directory |
| 2343 (expand-file-name | |
| 2344 (file-name-nondirectory (buffer-name)) | |
| 2345 default-directory) | |
| 2346 nil nil)) | |
| 428 | 2347 t |
| 771 | 2348 (if current-prefix-arg (read-coding-system "Coding system: ")))) |
| 428 | 2349 (and (eq (current-buffer) mouse-grabbed-buffer) |
| 2350 (error "Can't write minibuffer window")) | |
| 2351 (or (null filename) (string-equal filename "") | |
| 2352 (progn | |
| 2353 ;; If arg is just a directory, | |
| 1333 | 2354 ;; use the default file name, but in that directory. |
| 2355 (if (file-directory-p filename) | |
| 428 | 2356 (setq filename (concat (file-name-as-directory filename) |
| 1333 | 2357 (file-name-nondirectory |
| 2358 (or buffer-file-name (buffer-name)))))) | |
| 428 | 2359 (and confirm |
| 2360 (file-exists-p filename) | |
| 2361 (or (y-or-n-p (format "File `%s' exists; overwrite? " filename)) | |
| 2362 (error "Canceled"))) | |
| 1333 | 2363 (set-visited-file-name filename (not confirm)))) |
| 428 | 2364 (set-buffer-modified-p t) |
| 1333 | 2365 ;; Make buffer writable if file is writable. |
| 2366 (and buffer-file-name | |
| 2367 (file-writable-p buffer-file-name) | |
| 2368 (setq buffer-read-only nil)) | |
| 428 | 2369 (if codesys |
| 2370 (let ((buffer-file-coding-system (get-coding-system codesys))) | |
| 2371 (save-buffer)) | |
| 2372 (save-buffer))) | |
| 2373 | |
| 1333 | 2374 |
| 428 | 2375 (defun backup-buffer () |
| 2376 "Make a backup of the disk file visited by the current buffer, if appropriate. | |
| 2377 This is normally done before saving the buffer the first time. | |
| 1333 | 2378 If the value is non-nil, it is the result of `file-modes' on the original |
| 2379 file; this means that the caller, after saving the buffer, should change | |
| 2380 the modes of the new file to agree with the old modes. | |
| 2381 | |
| 2382 A backup may be done by renaming or by copying; see documentation of | |
| 2383 variable `make-backup-files'. If it's done by renaming, then the file is | |
| 2384 no longer accessible under its old name." | |
| 428 | 2385 (if buffer-file-name |
| 2386 (let ((handler (find-file-name-handler buffer-file-name 'backup-buffer))) | |
| 2387 (if handler | |
| 2388 (funcall handler 'backup-buffer) | |
| 2389 (if (and make-backup-files | |
| 2390 (not backup-inhibited) | |
| 2391 (not buffer-backed-up) | |
| 2392 (file-exists-p buffer-file-name) | |
| 2393 (memq (aref (elt (file-attributes buffer-file-name) 8) 0) | |
| 2394 '(?- ?l))) | |
| 2395 (let ((real-file-name buffer-file-name) | |
| 2396 backup-info backupname targets setmodes) | |
| 2397 ;; If specified name is a symbolic link, chase it to the target. | |
| 2398 ;; Thus we make the backups in the directory where the real file is. | |
| 2399 (setq real-file-name (file-chase-links real-file-name)) | |
| 2400 (setq backup-info (find-backup-file-name real-file-name) | |
| 2401 backupname (car backup-info) | |
| 2402 targets (cdr backup-info)) | |
| 2403 ;;; (if (file-directory-p buffer-file-name) | |
| 2404 ;;; (error "Cannot save buffer in directory %s" buffer-file-name)) | |
| 2405 (if backup-info | |
| 2406 (condition-case () | |
| 2407 (let ((delete-old-versions | |
| 2408 ;; If have old versions to maybe delete, | |
| 2409 ;; ask the user to confirm now, before doing anything. | |
| 440 | 2410 ;; But don't actually delete till later. |
| 428 | 2411 (and targets |
| 2412 (or (eq delete-old-versions t) | |
| 2413 (eq delete-old-versions nil)) | |
| 2414 (or delete-old-versions | |
| 2415 (y-or-n-p (format "Delete excess backup versions of %s? " | |
| 2416 real-file-name)))))) | |
| 2417 ;; Actually write the back up file. | |
| 2418 (condition-case () | |
| 2419 (if (or file-precious-flag | |
| 2420 ; (file-symlink-p buffer-file-name) | |
| 2421 backup-by-copying | |
| 2422 (and backup-by-copying-when-linked | |
| 2423 (> (file-nlinks real-file-name) 1)) | |
| 1333 | 2424 (and (or backup-by-copying-when-mismatch |
| 2425 (integerp backup-by-copying-when-privileged-mismatch)) | |
| 428 | 2426 (let ((attr (file-attributes real-file-name))) |
| 1333 | 2427 (and (or backup-by-copying-when-mismatch |
| 2428 (and (integerp (nth 2 attr)) | |
| 2429 (integerp backup-by-copying-when-privileged-mismatch) | |
| 2430 (<= (nth 2 attr) backup-by-copying-when-privileged-mismatch))) | |
| 2431 (or (nth 9 attr) | |
| 2432 (not (file-ownership-preserved-p real-file-name))))))) | |
| 428 | 2433 (condition-case () |
| 2434 (copy-file real-file-name backupname t t) | |
| 2435 (file-error | |
| 2436 ;; If copying fails because file BACKUPNAME | |
| 2437 ;; is not writable, delete that file and try again. | |
| 2438 (if (and (file-exists-p backupname) | |
| 2439 (not (file-writable-p backupname))) | |
| 2440 (delete-file backupname)) | |
| 2441 (copy-file real-file-name backupname t t))) | |
| 2442 ;; rename-file should delete old backup. | |
| 2443 (rename-file real-file-name backupname t) | |
| 2444 (setq setmodes (file-modes backupname))) | |
| 2445 (file-error | |
| 2710 | 2446 ;; If trouble writing the backup, write |
| 2447 ;; it in `auto-save-directory'. Fall | |
| 2448 ;; back to $HOME if that's not possible. | |
| 464 | 2449 (setq backupname |
| 2710 | 2450 (expand-file-name "%backup%~" |
| 2451 (or (when (and auto-save-directory | |
| 2452 (file-writable-p auto-save-directory)) | |
| 2453 auto-save-directory) | |
| 2454 (getenv "HOME")))) | |
| 1333 | 2455 (lwarn 'file 'alert "Cannot write backup file; backing up in %s" |
| 2456 (file-name-nondirectory backupname)) | |
| 428 | 2457 (sleep-for 1) |
| 2458 (condition-case () | |
| 2459 (copy-file real-file-name backupname t t) | |
| 2460 (file-error | |
| 2461 ;; If copying fails because file BACKUPNAME | |
| 2462 ;; is not writable, delete that file and try again. | |
| 2463 (if (and (file-exists-p backupname) | |
| 2464 (not (file-writable-p backupname))) | |
| 2465 (delete-file backupname)) | |
| 2466 (copy-file real-file-name backupname t t))))) | |
| 2467 (setq buffer-backed-up t) | |
| 2468 ;; Now delete the old versions, if desired. | |
| 2469 (if delete-old-versions | |
| 2470 (while targets | |
| 2471 (ignore-file-errors (delete-file (car targets))) | |
| 2472 (setq targets (cdr targets)))) | |
| 2473 setmodes) | |
| 2474 (file-error nil))))))))) | |
| 2475 | |
| 2476 (defun file-name-sans-versions (name &optional keep-backup-version) | |
| 2477 "Return FILENAME sans backup versions or strings. | |
| 2478 This is a separate procedure so your site-init or startup file can | |
| 2479 redefine it. | |
| 2480 If the optional argument KEEP-BACKUP-VERSION is non-nil, | |
| 2481 we do not remove backup version numbers, only true file version numbers." | |
| 2482 (let ((handler (find-file-name-handler name 'file-name-sans-versions))) | |
| 2483 (if handler | |
| 2484 (funcall handler 'file-name-sans-versions name keep-backup-version) | |
| 2485 (substring name 0 | |
| 2486 (if keep-backup-version | |
| 2487 (length name) | |
| 2488 (or (string-match "\\.~[0-9.]+~\\'" name) | |
| 2489 ;; XEmacs - VC uses extensions like ".~tagname~" or ".~1.1.5.2~" | |
| 2490 (let ((pos (string-match "\\.~\\([^.~ \t]+\\|[0-9.]+\\)~\\'" name))) | |
| 2491 (and pos | |
| 2492 ;; #### - is this filesystem check too paranoid? | |
| 2493 (file-exists-p (substring name 0 pos)) | |
| 2494 pos)) | |
| 2495 (string-match "~\\'" name) | |
| 2496 (length name))))))) | |
| 2497 | |
| 2498 (defun file-ownership-preserved-p (file) | |
| 2499 "Return t if deleting FILE and rewriting it would preserve the owner." | |
| 2500 (let ((handler (find-file-name-handler file 'file-ownership-preserved-p))) | |
| 2501 (if handler | |
| 2502 (funcall handler 'file-ownership-preserved-p file) | |
| 2503 (let ((attributes (file-attributes file))) | |
| 2504 ;; Return t if the file doesn't exist, since it's true that no | |
| 2505 ;; information would be lost by an (attempted) delete and create. | |
| 2506 (or (null attributes) | |
| 2507 (= (nth 2 attributes) (user-uid))))))) | |
| 2508 | |
| 2509 (defun file-name-sans-extension (filename) | |
| 2510 "Return FILENAME sans final \"extension\". | |
| 2511 The extension, in a file name, is the part that follows the last `.'." | |
| 2512 (save-match-data | |
| 2513 (let ((file (file-name-sans-versions (file-name-nondirectory filename))) | |
| 2514 directory) | |
| 2515 (if (string-match "\\.[^.]*\\'" file) | |
| 2516 (if (setq directory (file-name-directory filename)) | |
| 2517 (expand-file-name (substring file 0 (match-beginning 0)) | |
| 2518 directory) | |
| 2519 (substring file 0 (match-beginning 0))) | |
| 2520 filename)))) | |
| 2521 | |
| 2522 (defun file-name-extension (filename &optional period) | |
| 2523 "Return FILENAME's final \"extension\". | |
| 2524 The extension, in a file name, is the part that follows the last `.'. | |
| 2525 Return nil for extensionless file names such as `foo'. | |
| 3061 | 2526 Return the empty string for file names such as `foo'. |
| 428 | 2527 |
| 2528 If PERIOD is non-nil, then the returned value includes the period | |
| 2529 that delimits the extension, and if FILENAME has no extension, | |
| 2530 the value is \"\"." | |
| 2531 (save-match-data | |
| 2532 (let ((file (file-name-sans-versions (file-name-nondirectory filename)))) | |
| 2533 (if (string-match "\\.[^.]*\\'" file) | |
| 2534 (substring file (+ (match-beginning 0) (if period 0 1))) | |
| 2535 (if period | |
| 2536 ""))))) | |
| 2537 | |
| 1333 | 2538 (defcustom make-backup-file-name-function nil |
| 2539 "A function to use instead of the default `make-backup-file-name'. | |
| 2540 A value of nil gives the default `make-backup-file-name' behaviour. | |
| 2541 | |
| 2542 This could be buffer-local to do something special for specific | |
| 2543 files. If you define it, you may need to change `backup-file-name-p' | |
| 2544 and `file-name-sans-versions' too. | |
| 2545 | |
| 2546 See also `backup-directory-alist'." | |
| 2547 :group 'backup | |
| 2548 :type '(choice (const :tag "Default" nil) | |
| 2549 (function :tag "Your function"))) | |
| 2550 | |
| 2551 (defcustom backup-directory-alist nil | |
| 2552 "Alist of filename patterns and backup directory names. | |
| 2553 Each element looks like (REGEXP . DIRECTORY). Backups of files with | |
| 2554 names matching REGEXP will be made in DIRECTORY. DIRECTORY may be | |
| 2555 relative or absolute. If it is absolute, so that all matching files | |
| 2556 are backed up into the same directory, the file names in this | |
| 2557 directory will be the full name of the file backed up with all | |
| 2558 directory separators changed to `!' to prevent clashes. This will not | |
| 2559 work correctly if your filesystem truncates the resulting name. | |
| 2560 | |
| 2561 For the common case of all backups going into one directory, the alist | |
| 2562 should contain a single element pairing \".\" with the appropriate | |
| 2563 directory name. | |
| 2564 | |
| 2565 If this variable is nil, or it fails to match a filename, the backup | |
| 2566 is made in the original file's directory. | |
| 2567 | |
| 2568 On MS-DOS filesystems without long names this variable is always | |
| 2569 ignored." | |
| 2570 :group 'backup | |
| 2571 :type '(repeat (cons (regexp :tag "Regexp matching filename") | |
| 2572 (directory :tag "Backup directory name")))) | |
| 2573 | |
| 428 | 2574 (defun make-backup-file-name (file) |
| 2575 "Create the non-numeric backup file name for FILE. | |
| 1333 | 2576 Normally this will just be the file's name with `~' appended. |
| 2577 Customization hooks are provided as follows. | |
| 2578 | |
| 2579 If the variable `make-backup-file-name-function' is non-nil, its value | |
| 2580 should be a function which will be called with FILE as its argument; | |
| 2581 the resulting name is used. | |
| 2582 | |
| 2583 Otherwise a match for FILE is sought in `backup-directory-alist'; see | |
| 2584 the documentation of that variable. If the directory for the backup | |
| 2585 doesn't exist, it is created." | |
| 2586 (if make-backup-file-name-function | |
| 2587 (funcall make-backup-file-name-function file) | |
| 2588 ; (if (and (eq system-type 'ms-dos) | |
| 2589 ; (not (msdos-long-file-names))) | |
| 2590 ; (let ((fn (file-name-nondirectory file))) | |
| 2591 ; (concat (file-name-directory file) | |
| 2592 ; (or (and (string-match "\\`[^.]+\\'" fn) | |
| 2593 ; (concat (match-string 0 fn) ".~")) | |
| 2594 ; (and (string-match "\\`[^.]+\\.\\(..?\\)?" fn) | |
| 2595 ; (concat (match-string 0 fn) "~"))))) | |
| 2596 (concat (make-backup-file-name-1 file) "~"))) | |
| 2597 | |
| 2598 (defun make-backup-file-name-1 (file) | |
| 2599 "Subroutine of `make-backup-file-name' and `find-backup-file-name'." | |
| 2600 (let ((alist backup-directory-alist) | |
| 2601 elt backup-directory dir-sep-string) | |
| 2602 (while alist | |
| 2603 (setq elt (pop alist)) | |
| 2604 (if (string-match (car elt) file) | |
| 2605 (setq backup-directory (cdr elt) | |
| 2606 alist nil))) | |
| 2607 (if (null backup-directory) | |
| 2608 file | |
| 2609 (unless (file-exists-p backup-directory) | |
| 2610 (condition-case nil | |
| 2611 (make-directory backup-directory 'parents) | |
| 2612 (file-error file))) | |
| 2613 (if (file-name-absolute-p backup-directory) | |
| 2614 (progn | |
| 2615 (when (memq system-type '(windows-nt ms-dos)) | |
| 2616 ;; Normalize DOSish file names: convert all slashes to | |
| 2617 ;; directory-sep-char, downcase the drive letter, if any, | |
| 2618 ;; and replace the leading "x:" with "/drive_x". | |
| 2619 (or (file-name-absolute-p file) | |
| 2620 (setq file (expand-file-name file))) ; make defaults explicit | |
| 2621 ;; Replace any invalid file-name characters (for the | |
| 2622 ;; case of backing up remote files). | |
| 2623 (setq file (expand-file-name (convert-standard-filename file))) | |
| 2624 (setq dir-sep-string (char-to-string directory-sep-char)) | |
| 2625 (if (eq (aref file 1) ?:) | |
| 2626 (setq file (concat dir-sep-string | |
| 2627 "drive_" | |
| 2628 (char-to-string (downcase (aref file 0))) | |
| 2629 (if (eq (aref file 2) directory-sep-char) | |
| 2630 "" | |
| 2631 dir-sep-string) | |
| 2632 (substring file 2))))) | |
| 2633 ;; Make the name unique by substituting directory | |
| 2634 ;; separators. It may not really be worth bothering about | |
| 2635 ;; doubling `!'s in the original name... | |
| 2636 (expand-file-name | |
| 2637 (subst-char-in-string | |
| 2638 directory-sep-char ?! | |
| 2639 (replace-regexp-in-string "!" "!!" file)) | |
| 2640 backup-directory)) | |
| 2641 (expand-file-name (file-name-nondirectory file) | |
| 2642 (file-name-as-directory | |
| 2643 (expand-file-name backup-directory | |
| 2644 (file-name-directory file)))))))) | |
| 428 | 2645 |
| 2646 (defun backup-file-name-p (file) | |
| 2647 "Return non-nil if FILE is a backup file name (numeric or not). | |
| 2648 This is a separate function so you can redefine it for customization. | |
| 2649 You may need to redefine `file-name-sans-versions' as well." | |
| 440 | 2650 (string-match "~\\'" file)) |
| 428 | 2651 |
| 1333 | 2652 (defvar backup-extract-version-start) |
| 2653 | |
| 428 | 2654 ;; This is used in various files. |
| 1333 | 2655 ;; The usage of backup-extract-version-start is not very clean, |
| 2656 ;; but I can't see a good alternative, so as of now I am leaving it alone. | |
| 428 | 2657 (defun backup-extract-version (fn) |
| 1333 | 2658 "Given the name of a numeric backup file, FN, return the backup number. |
| 2659 Uses the free variable `backup-extract-version-start', whose value should be | |
| 428 | 2660 the index in the name where the version number begins." |
| 1333 | 2661 (if (and (string-match "[0-9]+~$" fn backup-extract-version-start) |
| 2662 (= (match-beginning 0) backup-extract-version-start)) | |
| 2663 (string-to-int (substring fn backup-extract-version-start -1)) | |
| 428 | 2664 0)) |
| 2665 | |
| 1333 | 2666 ;; [[ FSF 21.2 says: |
| 2667 ;; I believe there is no need to alter this behavior for VMS; | |
| 2668 ;; since backup files are not made on VMS, it should not get called. ]] | |
| 428 | 2669 (defun find-backup-file-name (fn) |
| 1333 | 2670 "Find a file name for a backup file FN, and suggestions for deletions. |
| 428 | 2671 Value is a list whose car is the name for the backup file |
| 1333 | 2672 and whose cdr is a list of old versions to consider deleting now. |
| 2673 If the value is nil, don't make a backup. | |
| 2674 Uses `backup-directory-alist' in the same way as does | |
| 2675 `make-backup-file-name'." | |
| 428 | 2676 (let ((handler (find-file-name-handler fn 'find-backup-file-name))) |
| 2677 ;; Run a handler for this function so that ange-ftp can refuse to do it. | |
| 2678 (if handler | |
| 2679 (funcall handler 'find-backup-file-name fn) | |
| 1333 | 2680 (if (or (eq version-control 'never) |
| 2681 ;; We don't support numbered backups on plain MS-DOS | |
| 2682 ;; when long file names are unavailable. | |
| 2683 ; (and (eq system-type 'ms-dos) | |
| 2684 ; (not (msdos-long-file-names))) | |
| 2685 ) | |
| 428 | 2686 (list (make-backup-file-name fn)) |
| 1333 | 2687 (let* ((basic-name (make-backup-file-name-1 fn)) |
| 2688 (base-versions (concat (file-name-nondirectory basic-name) | |
| 2689 ".~")) | |
| 2690 (backup-extract-version-start (length base-versions)) | |
| 428 | 2691 (high-water-mark 0) |
| 1333 | 2692 (number-to-delete 0) |
| 2693 possibilities deserve-versions-p versions) | |
| 428 | 2694 (condition-case () |
| 2695 (setq possibilities (file-name-all-completions | |
| 2696 base-versions | |
| 1333 | 2697 (file-name-directory basic-name)) |
| 2698 versions (sort (mapcar #'backup-extract-version | |
| 2699 possibilities) | |
| 2700 #'<) | |
| 2701 high-water-mark (apply 'max 0 versions) | |
| 428 | 2702 deserve-versions-p (or version-control |
| 2703 (> high-water-mark 0)) | |
| 2704 number-to-delete (- (length versions) | |
| 1333 | 2705 kept-old-versions |
| 2706 kept-new-versions | |
| 2707 -1)) | |
| 2708 (file-error (setq possibilities nil))) | |
| 428 | 2709 (if (not deserve-versions-p) |
| 2710 (list (make-backup-file-name fn)) | |
| 1333 | 2711 (cons (format "%s.~%d~" basic-name (1+ high-water-mark)) |
| 428 | 2712 (if (and (> number-to-delete 0) |
| 2713 ;; Delete nothing if there is overflow | |
| 2714 ;; in the number of versions to keep. | |
| 2715 (>= (+ kept-new-versions kept-old-versions -1) 0)) | |
| 1333 | 2716 (mapcar (lambda (n) |
| 2717 (format "%s.~%d~" basic-name n)) | |
| 428 | 2718 (let ((v (nthcdr kept-old-versions versions))) |
| 2719 (rplacd (nthcdr (1- number-to-delete) v) ()) | |
| 2720 v)))))))))) | |
| 2721 | |
| 2722 (defun file-nlinks (filename) | |
| 2723 "Return number of names file FILENAME has." | |
| 2724 (car (cdr (file-attributes filename)))) | |
| 2725 | |
| 2726 (defun file-relative-name (filename &optional directory) | |
| 1333 | 2727 "Convert FILENAME to be relative to DIRECTORY (default: `default-directory'). |
| 428 | 2728 This function returns a relative file name which is equivalent to FILENAME |
| 2729 when used with that default directory as the default. | |
| 442 | 2730 If this is impossible (which can happen on MS Windows when the file name |
| 2731 and directory use different drive names) then it returns FILENAME." | |
| 428 | 2732 (save-match-data |
| 2733 (let ((fname (expand-file-name filename))) | |
| 2734 (setq directory (file-name-as-directory | |
| 2735 (expand-file-name (or directory default-directory)))) | |
| 2736 ;; On Microsoft OSes, if FILENAME and DIRECTORY have different | |
| 2737 ;; drive names, they can't be relative, so return the absolute name. | |
| 440 | 2738 (if (and (eq system-type 'windows-nt) |
| 428 | 2739 (not (string-equal (substring fname 0 2) |
| 2740 (substring directory 0 2)))) | |
| 2741 filename | |
| 2742 (let ((ancestor ".") | |
| 2743 (fname-dir (file-name-as-directory fname))) | |
| 2744 (while (and (not (string-match (concat "^" (regexp-quote directory)) | |
| 2745 fname-dir)) | |
| 2746 (not (string-match (concat "^" (regexp-quote directory)) fname))) | |
| 2747 (setq directory (file-name-directory (substring directory 0 -1)) | |
| 2748 ancestor (if (equal ancestor ".") | |
| 2749 ".." | |
| 2750 (concat "../" ancestor)))) | |
| 2751 ;; Now ancestor is empty, or .., or ../.., etc. | |
| 2752 (if (string-match (concat "^" (regexp-quote directory)) fname) | |
| 2753 ;; We matched within FNAME's directory part. | |
| 2754 ;; Add the rest of FNAME onto ANCESTOR. | |
| 2755 (let ((rest (substring fname (match-end 0)))) | |
| 2756 (if (and (equal ancestor ".") | |
| 2757 (not (equal rest ""))) | |
| 2758 ;; But don't bother with ANCESTOR if it would give us `./'. | |
| 2759 rest | |
| 2760 (concat (file-name-as-directory ancestor) rest))) | |
| 2761 ;; We matched FNAME's directory equivalent. | |
| 2762 ancestor)))))) | |
| 2763 | |
| 2764 (defun save-buffer (&optional args) | |
| 2765 "Save current buffer in visited file if modified. Versions described below. | |
| 2766 By default, makes the previous version into a backup file | |
| 2767 if previously requested or if this is the first save. | |
| 1333 | 2768 With 1 \\[universal-argument], marks this version |
| 428 | 2769 to become a backup when the next save is done. |
| 1333 | 2770 With 2 \\[universal-argument]'s, |
| 428 | 2771 unconditionally makes the previous version into a backup file. |
| 1333 | 2772 With 3 \\[universal-argument]'s, marks this version |
| 2773 to become a backup when the next save is done, | |
| 2774 and unconditionally makes the previous version into a backup file. | |
| 2775 | |
| 2776 With argument of 0, never make the previous version into a backup file. | |
| 428 | 2777 |
| 2778 If a file's name is FOO, the names of its numbered backup versions are | |
| 2779 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~. | |
| 2780 Numeric backups (rather than FOO~) will be made if value of | |
| 2781 `version-control' is not the atom `never' and either there are already | |
| 2782 numeric versions of the file being backed up, or `version-control' is | |
| 2783 non-nil. | |
| 2784 We don't want excessive versions piling up, so there are variables | |
| 1333 | 2785 `kept-old-versions', which tells Emacs how many oldest versions to keep, |
| 428 | 2786 and `kept-new-versions', which tells how many newest versions to keep. |
| 2787 Defaults are 2 old versions and 2 new. | |
| 2788 `dired-kept-versions' controls dired's clean-directory (.) command. | |
| 2789 If `delete-old-versions' is nil, system will query user | |
| 1333 | 2790 before trimming versions. Otherwise it does it silently. |
| 2791 | |
| 2792 If `vc-make-backup-files' is nil, which is the default, | |
| 2793 no backup files are made for files managed by version control. | |
| 2794 (This is because the version control system itself records previous versions.) | |
| 2795 | |
| 2796 See the subroutine `basic-save-buffer' for more information." | |
| 428 | 2797 (interactive "_p") |
| 2798 (let ((modp (buffer-modified-p)) | |
| 2799 (large (> (buffer-size) 50000)) | |
| 2800 (make-backup-files (or (and make-backup-files (not (eq args 0))) | |
| 2801 (memq args '(16 64))))) | |
| 2802 (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) | |
| 1333 | 2803 (if (and modp large (buffer-file-name)) |
| 2804 (display-message 'progress (format "Saving file %s..." | |
| 2805 (buffer-file-name)))) | |
| 428 | 2806 (basic-save-buffer) |
| 2807 (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) | |
| 2808 | |
| 2809 (defun delete-auto-save-file-if-necessary (&optional force) | |
| 2810 "Delete auto-save file for current buffer if `delete-auto-save-files' is t. | |
| 1333 | 2811 Normally delete only if the file was written by this XEmacs since |
| 2812 the last real save, but optional arg FORCE non-nil means delete anyway." | |
| 428 | 2813 (and buffer-auto-save-file-name delete-auto-save-files |
| 2814 (not (string= buffer-file-name buffer-auto-save-file-name)) | |
| 2815 (or force (recent-auto-save-p)) | |
| 2816 (progn | |
| 2817 (ignore-file-errors (delete-file buffer-auto-save-file-name)) | |
| 2818 (set-buffer-auto-saved)))) | |
| 2819 | |
| 2820 ;; XEmacs change (from Sun) | |
| 2821 ;; used to communicate with continue-save-buffer: | |
| 2822 (defvar continue-save-buffer-hooks-tail nil) | |
| 2823 | |
| 2824 ;; Not in FSFmacs | |
| 2825 (defun basic-write-file-data (realname truename) | |
| 2826 ;; call the hooks until the bytes are put | |
| 2827 ;; call write-region as a last resort | |
| 2828 (let ((region-written nil) | |
| 2829 (hooks write-file-data-hooks)) | |
| 2830 (while (and hooks (not region-written)) | |
| 2831 (setq region-written (funcall (car hooks) realname) | |
| 2832 hooks (cdr hooks))) | |
| 2833 (if (not region-written) | |
| 2834 (write-region (point-min) (point-max) realname nil t truename)))) | |
| 2835 | |
| 1333 | 2836 ; (defvar auto-save-hook nil |
| 2837 ; "Normal hook run just before auto-saving.") | |
| 2838 | |
| 428 | 2839 (put 'after-save-hook 'permanent-local t) |
| 2840 (defvar after-save-hook nil | |
| 2841 "Normal hook that is run after a buffer is saved to its file. | |
| 2842 These hooks are considered to pertain to the visited file. | |
| 2843 So this list is cleared if you change the visited file name.") | |
| 2844 | |
| 1333 | 2845 (defvar save-buffer-coding-system nil |
| 2846 "If non-nil, use this coding system for saving the buffer. | |
| 2847 More precisely, use this coding system in place of the | |
| 2848 value of `buffer-file-coding-system', when saving the buffer. | |
| 2849 Calling `write-region' for any purpose other than saving the buffer | |
| 2850 will still use `buffer-file-coding-system'; this variable has no effect | |
| 2851 in such cases.") | |
| 2852 | |
| 2853 (make-variable-buffer-local 'save-buffer-coding-system) | |
| 2854 (put 'save-buffer-coding-system 'permanent-local t) | |
| 2855 | |
| 428 | 2856 (defun files-fetch-hook-value (hook) |
| 4156 | 2857 (let ((localval (copy-list (symbol-value hook))) |
| 2858 (globalval (copy-list (default-value hook)))) | |
| 428 | 2859 (if (memq t localval) |
| 2860 (setq localval (append (delq t localval) (delq t globalval)))) | |
| 2861 localval)) | |
| 2862 | |
| 2863 (defun basic-save-buffer () | |
| 2864 "Save the current buffer in its visited file, if it has been modified. | |
| 1333 | 2865 The hooks `write-contents-hooks', `local-write-file-hooks' and |
| 2866 `write-file-hooks' get a chance to do the job of saving; if they do not, | |
| 2116 | 2867 then the buffer is saved in the visited file in the usual way. |
| 1333 | 2868 After saving the buffer, this function runs `after-save-hook'." |
| 428 | 2869 (interactive) |
| 1333 | 2870 (save-current-buffer |
| 428 | 2871 ;; In an indirect buffer, save its base buffer instead. |
| 2872 (if (buffer-base-buffer) | |
| 2873 (set-buffer (buffer-base-buffer))) | |
| 2874 (if (buffer-modified-p) | |
| 2875 (let ((recent-save (recent-auto-save-p))) | |
| 2876 ;; If buffer has no file name, ask user for one. | |
| 2877 (or buffer-file-name | |
| 2878 (let ((filename | |
| 2879 (expand-file-name | |
| 2880 (read-file-name "File to save in: ") nil))) | |
| 2881 (and (file-exists-p filename) | |
| 2882 (or (y-or-n-p (format "File `%s' exists; overwrite? " | |
| 2883 filename)) | |
| 2884 (error "Canceled"))) | |
| 2885 (set-visited-file-name filename))) | |
| 2886 (or (verify-visited-file-modtime (current-buffer)) | |
| 2887 (not (file-exists-p buffer-file-name)) | |
| 2888 (yes-or-no-p | |
| 2889 (format "%s has changed since visited or saved. Save anyway? " | |
| 2890 (file-name-nondirectory buffer-file-name))) | |
| 2891 (error "Save not confirmed")) | |
| 2892 (save-restriction | |
| 2893 (widen) | |
| 1333 | 2894 (save-excursion |
| 2895 (and (> (point-max) 1) | |
| 2896 (not find-file-literally) | |
| 2897 (not (eq (char-after (1- (point-max))) ?\n)) | |
| 2898 (not (and (eq selective-display t) | |
| 2899 (eq (char-after (1- (point-max))) ?\r))) | |
| 2900 (or (eq require-final-newline t) | |
| 2901 (and require-final-newline | |
| 2902 (y-or-n-p | |
| 2903 (format "Buffer %s does not end in newline. Add one? " | |
| 2904 (buffer-name))))) | |
| 2905 (save-excursion | |
| 2906 (goto-char (point-max)) | |
| 2907 (insert ?\n)))) | |
| 2908 | |
| 2909 ;; Support VC version backups. | |
| 2910 (if-fboundp 'vc-before-save | |
| 2911 (vc-before-save)) | |
| 434 | 2912 |
| 444 | 2913 ;; Run the write-file-hooks until one returns non-nil. |
| 428 | 2914 ;; Bind after-save-hook to nil while running the |
| 2915 ;; write-file-hooks so that if this function is called | |
| 2916 ;; recursively (from inside a write-file-hook) the | |
| 2917 ;; after-hooks will only get run once (from the | |
| 2918 ;; outermost call). | |
| 2919 ;; | |
| 2920 ;; Ugh, have to duplicate logic of run-hook-with-args-until-success | |
| 2921 (let ((hooks (append (files-fetch-hook-value 'write-contents-hooks) | |
| 2922 (files-fetch-hook-value | |
| 2923 'local-write-file-hooks) | |
| 2924 (files-fetch-hook-value 'write-file-hooks))) | |
| 2925 (after-save-hook nil) | |
| 2926 (local-write-file-hooks nil) | |
| 2927 (write-contents-hooks nil) | |
| 2928 (write-file-hooks nil) | |
| 2929 done) | |
| 2930 (while (and hooks | |
| 2931 (let ((continue-save-buffer-hooks-tail hooks)) | |
| 2932 (not (setq done (funcall (car hooks)))))) | |
| 2933 (setq hooks (cdr hooks))) | |
| 2934 ;; If a hook returned t, file is already "written". | |
| 2935 ;; Otherwise, write it the usual way now. | |
| 2936 (if (not done) | |
| 2937 (basic-save-buffer-1))) | |
| 2938 ;; XEmacs: next two clauses (buffer-file-number setting and | |
| 1333 | 2939 ;; set-file-modes) moved into basic-save-buffer-1 for use by |
| 2940 ;; continue-save-buffer. | |
| 428 | 2941 ) |
| 2942 ;; If the auto-save file was recent before this command, | |
| 2943 ;; delete it now. | |
| 2944 (delete-auto-save-file-if-necessary recent-save) | |
| 2945 ;; Support VC `implicit' locking. | |
| 502 | 2946 (if-fboundp 'vc-after-save |
| 2947 (vc-after-save)) | |
| 428 | 2948 (run-hooks 'after-save-hook)) |
| 2949 (display-message 'no-log "(No changes need to be saved)")))) | |
| 2950 | |
| 2951 ;; This does the "real job" of writing a buffer into its visited file | |
| 2952 ;; and making a backup file. This is what is normally done | |
| 2953 ;; but inhibited if one of write-file-hooks returns non-nil. | |
| 2954 ;; It returns a value to store in setmodes. | |
| 2955 (defun basic-save-buffer-1 () | |
| 1333 | 2956 (if save-buffer-coding-system |
| 2957 (let ((coding-system-for-write save-buffer-coding-system)) | |
| 2958 (basic-save-buffer-2)) | |
| 2959 (basic-save-buffer-2))) | |
| 2960 | |
| 2961 (defun basic-save-buffer-2 () | |
| 428 | 2962 (let (setmodes tempsetmodes) |
| 2963 (if (not (file-writable-p buffer-file-name)) | |
| 2964 (let ((dir (file-name-directory buffer-file-name))) | |
| 2965 (if (not (file-directory-p dir)) | |
| 1333 | 2966 (if (file-exists-p dir) |
| 2967 (error "%s is not a directory" dir) | |
| 2968 (error "%s: no such directory" buffer-file-name)) | |
| 428 | 2969 (if (not (file-exists-p buffer-file-name)) |
| 2970 (error "Directory %s write-protected" dir) | |
| 2971 (if (yes-or-no-p | |
| 2972 (format "File %s is write-protected; try to save anyway? " | |
| 2973 (file-name-nondirectory | |
| 2974 buffer-file-name))) | |
| 2975 (setq tempsetmodes t) | |
| 2976 (error | |
| 2977 "Attempt to save to a file which you aren't allowed to write")))))) | |
| 2978 (or buffer-backed-up | |
| 2979 (setq setmodes (backup-buffer))) | |
| 2980 (let ((dir (file-name-directory buffer-file-name))) | |
| 2981 (if (and file-precious-flag | |
| 2982 (file-writable-p dir)) | |
| 2983 ;; If file is precious, write temp name, then rename it. | |
| 2984 ;; This requires write access to the containing dir, | |
| 2985 ;; which is why we don't try it if we don't have that access. | |
| 2986 (let ((realname buffer-file-name) | |
| 2987 tempname nogood i succeed | |
| 2988 (old-modtime (visited-file-modtime))) | |
| 2989 (setq i 0) | |
| 2990 (setq nogood t) | |
| 2991 ;; Find the temporary name to write under. | |
| 2992 (while nogood | |
| 2993 (setq tempname (format "%s#tmp#%d" dir i)) | |
| 2994 (setq nogood (file-exists-p tempname)) | |
| 2995 (setq i (1+ i))) | |
| 2996 (unwind-protect | |
| 2997 (progn (clear-visited-file-modtime) | |
| 2998 (write-region (point-min) (point-max) | |
| 2999 tempname nil realname | |
| 3000 buffer-file-truename) | |
| 3001 (setq succeed t)) | |
| 3002 ;; If writing the temp file fails, | |
| 3003 ;; delete the temp file. | |
| 3004 (or succeed | |
| 3005 (progn | |
| 1333 | 3006 (ignore-file-errors |
| 3007 (delete-file tempname)) | |
| 428 | 3008 (set-visited-file-modtime old-modtime)))) |
| 3009 ;; Since we have created an entirely new file | |
| 3010 ;; and renamed it, make sure it gets the | |
| 3011 ;; right permission bits set. | |
| 3012 (setq setmodes (file-modes buffer-file-name)) | |
| 3013 ;; We succeeded in writing the temp file, | |
| 3014 ;; so rename it. | |
| 3015 (rename-file tempname buffer-file-name t)) | |
| 3016 ;; If file not writable, see if we can make it writable | |
| 3017 ;; temporarily while we write it. | |
| 3018 ;; But no need to do so if we have just backed it up | |
| 3019 ;; (setmodes is set) because that says we're superseding. | |
| 3020 (cond ((and tempsetmodes (not setmodes)) | |
| 3021 ;; Change the mode back, after writing. | |
| 3022 (setq setmodes (file-modes buffer-file-name)) | |
| 1333 | 3023 (set-file-modes buffer-file-name (logior setmodes 128)))) |
| 428 | 3024 (basic-write-file-data buffer-file-name buffer-file-truename))) |
| 1333 | 3025 ;; #### FSF 21.2. We don't have last-coding-system-used. |
| 3026 ; ;; Now we have saved the current buffer. Let's make sure | |
| 3027 ; ;; that buffer-file-coding-system is fixed to what | |
| 3028 ; ;; actually used for saving by binding it locally. | |
| 3029 ; (if save-buffer-coding-system | |
| 3030 ; (setq save-buffer-coding-system last-coding-system-used) | |
| 3031 ; (setq buffer-file-coding-system last-coding-system-used)) | |
| 428 | 3032 (setq buffer-file-number |
| 3033 (if buffer-file-name | |
| 3034 (nth 10 (file-attributes buffer-file-name)) | |
| 3035 nil)) | |
| 3036 (if setmodes | |
| 3037 (condition-case () | |
| 3038 (set-file-modes buffer-file-name setmodes) | |
| 3039 (error nil))))) | |
| 3040 | |
| 3041 ;; XEmacs change, from Sun | |
| 3042 (defun continue-save-buffer () | |
| 3043 "Provide a clean way for a write-file-hook to wrap AROUND | |
| 3044 the execution of the remaining hooks and writing to disk. | |
| 3045 Do not call this function except from a functions | |
| 444 | 3046 on the `write-file-hooks' or `write-contents-hooks' list. |
| 428 | 3047 A hook that calls this function must return non-nil, |
| 444 | 3048 to signal completion to its caller. `continue-save-buffer' |
| 428 | 3049 always returns non-nil." |
| 3050 (let ((hooks (cdr (or continue-save-buffer-hooks-tail | |
| 3051 (error | |
| 3052 "continue-save-buffer called outside a write-file-hook!")))) | |
| 3053 (done nil)) | |
| 3054 ;; Do something like this: | |
| 3055 ;; (let ((write-file-hooks hooks)) (basic-save-buffer)) | |
| 3056 ;; First run the rest of the hooks. | |
| 3057 (while (and hooks | |
| 3058 (let ((continue-save-buffer-hooks-tail hooks)) | |
| 3059 (not (setq done (funcall (car hooks)))))) | |
| 3060 (setq hooks (cdr hooks))) | |
| 3061 ;; | |
| 3062 ;; If a hook returned t, file is already "written". | |
| 3063 (if (not done) | |
| 3064 (basic-save-buffer-1)) | |
| 3065 'continue-save-buffer)) | |
| 3066 | |
| 3067 (defcustom save-some-buffers-query-display-buffer t | |
| 3068 "*Non-nil makes `\\[save-some-buffers]' switch to the buffer offered for saving." | |
| 3069 :type 'boolean | |
| 3070 :group 'editing-basics) | |
| 3071 | |
| 1333 | 3072 (defun save-some-buffers (&optional arg pred) |
| 428 | 3073 "Save some modified file-visiting buffers. Asks user about each one. |
| 3074 Optional argument (the prefix) non-nil means save all with no questions. | |
| 1333 | 3075 Optional second argument PRED determines which buffers are considered: |
| 3076 If PRED is nil, all the file-visiting buffers are considered. | |
| 3077 If PRED is t, then certain non-file buffers will also be considered. | |
| 3078 If PRED is a zero-argument function, it indicates for each buffer whether | |
| 3079 to consider it or not when called with that buffer current." | |
| 428 | 3080 (interactive "P") |
| 3081 (save-excursion | |
| 3082 ;; `delete-other-windows' can bomb during autoloads generation, so | |
| 3083 ;; guard it well. | |
| 3084 (if (or noninteractive | |
| 3085 (eq (selected-window) (minibuffer-window)) | |
| 3086 (not save-some-buffers-query-display-buffer)) | |
| 3087 ;; If playing with windows is unsafe or undesired, just do the | |
| 3088 ;; usual drill. | |
| 1333 | 3089 (save-some-buffers-1 arg pred nil) |
| 428 | 3090 ;; Else, protect the windows. |
| 3091 (when (save-window-excursion | |
| 1333 | 3092 (save-some-buffers-1 arg pred t)) |
| 428 | 3093 ;; Force redisplay. |
| 3094 (sit-for 0))))) | |
| 3095 | |
| 3096 ;; XEmacs - do not use queried flag | |
| 1333 | 3097 (defun save-some-buffers-1 (arg pred switch-buffer) |
| 428 | 3098 (let* ((switched nil) |
| 612 | 3099 (last-buffer nil) |
| 428 | 3100 (files-done |
| 3101 (map-y-or-n-p | |
| 3102 (lambda (buffer) | |
| 612 | 3103 (prog1 |
| 3104 (and (buffer-modified-p buffer) | |
| 3105 (not (buffer-base-buffer buffer)) | |
| 3106 ;; XEmacs addition: | |
| 3107 (not (symbol-value-in-buffer 'save-buffers-skip buffer)) | |
| 3108 (or | |
| 3109 (buffer-file-name buffer) | |
| 1333 | 3110 (and pred |
| 612 | 3111 (progn |
| 3112 (set-buffer buffer) | |
| 3113 (and buffer-offer-save (> (buffer-size) 0))))) | |
| 1333 | 3114 (or (not (functionp pred)) |
| 3115 (with-current-buffer buffer (funcall pred))) | |
| 612 | 3116 (if arg |
| 3117 t | |
| 3118 ;; #### We should provide a per-buffer means to | |
| 3119 ;; disable the switching. For instance, you might | |
| 3120 ;; want to turn it off for buffers the contents of | |
| 3121 ;; which is meaningless to humans, such as | |
| 3122 ;; `.newsrc.eld'. | |
| 3123 (when (and switch-buffer | |
| 3124 ;; map-y-or-n-p is displaying help | |
| 3125 (not (eq last-buffer buffer))) | |
| 3126 (unless (one-window-p) | |
| 3127 (delete-other-windows)) | |
| 3128 (setq switched t) | |
| 3129 ;; #### Consider using `display-buffer' here for 21.1! | |
| 3130 ;;(display-buffer buffer nil (selected-frame))) | |
| 3131 (switch-to-buffer buffer t)) | |
| 3132 (if (buffer-file-name buffer) | |
| 3133 (format "Save file %s? " | |
| 3134 (buffer-file-name buffer)) | |
| 3135 (format "Save buffer %s? " | |
| 3136 (buffer-name buffer))))) | |
| 3137 (setq last-buffer buffer))) | |
| 428 | 3138 (lambda (buffer) |
| 3139 (set-buffer buffer) | |
| 3140 (condition-case () | |
| 3141 (save-buffer) | |
| 3142 (error nil))) | |
| 3143 (buffer-list) | |
| 3144 '("buffer" "buffers" "save") | |
| 3145 ;;instead of this we just say "yes all", "no all", etc. | |
| 3146 ;;"save all the rest" | |
| 3147 ;;"save only this buffer" "save no more buffers") | |
| 3148 ;; this is rather bogus. --ben | |
| 3149 ;; (it makes the dialog box too big, and you get an error | |
| 3150 ;; "wrong type argument: framep, nil" when you hit q after | |
| 3151 ;; choosing the option from the dialog box) | |
| 3152 | |
| 3153 ;; We should fix the dialog box rather than disabling | |
| 3154 ;; this! --hniksic | |
| 3155 (list (list ?\C-r (lambda (buf) | |
| 3156 ;; #### FSF has an EXIT-ACTION argument | |
| 3157 ;; to `view-buffer'. | |
| 1333 | 3158 (view-buffer buf |
| 3159 ; (function | |
| 3160 ; (lambda (ignore) | |
| 3161 ; (exit-recursive-edit)))) | |
| 3162 ) | |
| 502 | 3163 (with-boundp 'view-exit-action |
| 3164 (setq view-exit-action | |
| 3165 (lambda (ignore) | |
| 3166 (exit-recursive-edit)))) | |
| 428 | 3167 (recursive-edit) |
| 3168 ;; Return nil to ask about BUF again. | |
| 3169 nil) | |
| 442 | 3170 "%_Display Buffer")))) |
| 428 | 3171 (abbrevs-done |
| 3172 (and save-abbrevs abbrevs-changed | |
| 3173 (progn | |
| 3174 (if (or arg | |
| 1333 | 3175 (eq save-abbrevs 'silently) |
| 428 | 3176 (y-or-n-p (format "Save abbrevs in %s? " abbrev-file-name))) |
| 3177 (write-abbrev-file nil)) | |
| 3178 ;; Don't keep bothering user if he says no. | |
| 3179 (setq abbrevs-changed nil) | |
| 3180 t)))) | |
| 3181 (or (> files-done 0) abbrevs-done | |
| 3182 (display-message 'no-log "(No files need saving)")) | |
| 3183 switched)) | |
| 3184 | |
| 3185 | |
| 1333 | 3186 |
| 428 | 3187 (defun not-modified (&optional arg) |
| 3188 "Mark current buffer as unmodified, not needing to be saved. | |
| 3189 With prefix arg, mark buffer as modified, so \\[save-buffer] will save. | |
| 3190 | |
| 3191 It is not a good idea to use this function in Lisp programs, because it | |
| 3192 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'." | |
| 3193 (interactive "_P") | |
| 3194 (if arg ;; rewritten for I18N3 snarfing | |
| 3195 (display-message 'command "Modification-flag set") | |
| 3196 (display-message 'command "Modification-flag cleared")) | |
| 3197 (set-buffer-modified-p arg)) | |
| 3198 | |
| 3199 (defun toggle-read-only (&optional arg) | |
| 1333 | 3200 "Change whether this buffer is visiting its file read-only. |
| 3201 With arg, set read-only iff arg is positive. | |
| 3202 If visiting file read-only and `view-read-only' is non-nil, enter view mode." | |
| 3203 (interactive "P") | |
| 3204 (cond | |
| 3205 ((and arg (if (> (prefix-numeric-value arg) 0) buffer-read-only | |
| 3206 (not buffer-read-only))) ; If buffer-read-only is set correctly, | |
| 3207 nil) ; do nothing. | |
| 3208 ;; Toggle. | |
| 3209 ((and buffer-read-only view-minor-mode) | |
| 3210 ;(View-exit-and-edit) | |
| 3211 (view-mode) | |
| 3212 (make-local-variable 'view-read-only) | |
| 3213 (setq view-read-only t)) ; Must leave view mode. | |
| 3214 ((and (not buffer-read-only) view-read-only | |
| 3215 (not (eq (get major-mode 'mode-class) 'special))) | |
| 3216 ;(view-mode-enter) | |
| 3217 (view-mode)) | |
| 3218 (t (setq buffer-read-only (not buffer-read-only)) | |
| 3219 (force-mode-line-update)))) | |
| 428 | 3220 |
| 3221 (defun insert-file (filename &optional codesys) | |
| 3222 "Insert contents of file FILENAME into buffer after point. | |
| 3223 Set mark after the inserted text. | |
| 3224 | |
| 771 | 3225 Optional second argument specifies the coding system to use when decoding |
| 3226 the file. Interactively, with a prefix argument, you will be prompted for | |
| 3227 the coding system. | |
| 428 | 3228 |
| 771 | 3229 This function is meant for the user to run interactively. Don't call it |
| 3230 from programs! Use `insert-file-contents' instead. \(Its calling sequence | |
| 3231 is different; see its documentation)." | |
| 428 | 3232 (interactive "*fInsert file: \nZCoding system: ") |
| 3233 (if (file-directory-p filename) | |
| 3234 (signal 'file-error (list "Opening input file" "file is a directory" | |
| 3235 filename))) | |
| 3236 (let ((tem | |
| 3237 (if codesys | |
| 3238 (let ((coding-system-for-read | |
| 3239 (get-coding-system codesys))) | |
| 3240 (insert-file-contents filename)) | |
| 3241 (insert-file-contents filename)))) | |
| 3242 (push-mark (+ (point) (car (cdr tem)))))) | |
| 3243 | |
| 3244 (defun append-to-file (start end filename &optional codesys) | |
| 3245 "Append the contents of the region to the end of file FILENAME. | |
| 771 | 3246 When called from a function, expects three arguments, START, END and |
| 3247 FILENAME. START and END are buffer positions saying what text to write. | |
| 3248 Optional fourth argument specifies the coding system to use when encoding | |
| 3249 the file. Interactively, with a prefix argument, you will be prompted for | |
| 3250 the coding system." | |
| 428 | 3251 (interactive "r\nFAppend to file: \nZCoding system: ") |
| 3252 (if codesys | |
| 3253 (let ((buffer-file-coding-system (get-coding-system codesys))) | |
| 3254 (write-region start end filename t)) | |
| 3255 (write-region start end filename t))) | |
| 3256 | |
| 3257 (defun file-newest-backup (filename) | |
| 3258 "Return most recent backup file for FILENAME or nil if no backups exist." | |
| 1333 | 3259 ;; `make-backup-file-name' will get us the right directory for |
| 3260 ;; ordinary or numeric backups. It might create a directory for | |
| 3261 ;; backups as a side-effect, according to `backup-directory-alist'. | |
| 3262 (let* ((filename (file-name-sans-versions | |
| 3263 (make-backup-file-name filename))) | |
| 428 | 3264 (file (file-name-nondirectory filename)) |
| 3265 (dir (file-name-directory filename)) | |
| 3266 (comp (file-name-all-completions file dir)) | |
| 1333 | 3267 (newest nil) |
| 3268 tem) | |
| 428 | 3269 (while comp |
| 1333 | 3270 (setq tem (pop comp)) |
| 3271 (cond ((and (backup-file-name-p tem) | |
| 3272 (string= (file-name-sans-versions tem) file)) | |
| 3273 (setq tem (concat dir tem)) | |
| 3274 (if (or (null newest) | |
| 3275 (file-newer-than-file-p tem newest)) | |
| 3276 (setq newest tem))))) | |
| 428 | 3277 newest)) |
| 3278 | |
| 3279 (defun rename-uniquely () | |
| 3280 "Rename current buffer to a similar name not already taken. | |
| 3281 This function is useful for creating multiple shell process buffers | |
| 3282 or multiple mail buffers, etc." | |
| 3283 (interactive) | |
| 3284 (save-match-data | |
| 1333 | 3285 (let ((base-name (buffer-name))) |
| 3286 (and (string-match "<[0-9]+>\\'" base-name) | |
| 3287 (not (and buffer-file-name | |
| 3288 (string= base-name | |
| 3289 (file-name-nondirectory buffer-file-name)))) | |
| 3290 ;; If the existing buffer name has a <NNN>, | |
| 3291 ;; which isn't part of the file name (if any), | |
| 3292 ;; then get rid of that. | |
| 3293 (setq base-name (substring base-name 0 (match-beginning 0)))) | |
| 3294 (rename-buffer (generate-new-buffer-name base-name)) | |
| 3295 (force-mode-line-update)))) | |
| 428 | 3296 |
| 3297 (defun make-directory-path (path) | |
| 3298 "Create all the directories along path that don't exist yet." | |
| 3299 (interactive "Fdirectory path to create: ") | |
| 3300 (make-directory path t)) | |
| 3301 | |
| 3302 (defun make-directory (dir &optional parents) | |
| 3303 "Create the directory DIR and any nonexistent parent dirs. | |
| 3304 Interactively, the default choice of directory to create | |
| 3305 is the current default directory for file names. | |
| 3306 That is useful when you have visited a file in a nonexistent directory. | |
| 3307 | |
| 3308 Noninteractively, the second (optional) argument PARENTS says whether | |
| 3309 to create parent directories if they don't exist." | |
| 3310 (interactive (list (let ((current-prefix-arg current-prefix-arg)) | |
| 3311 (read-directory-name "Create directory: ")) | |
| 3312 current-prefix-arg)) | |
| 3313 (let ((handler (find-file-name-handler dir 'make-directory))) | |
| 3314 (if handler | |
| 3315 (funcall handler 'make-directory dir parents) | |
| 3316 (if (not parents) | |
| 3317 (make-directory-internal dir) | |
| 3318 (let ((dir (directory-file-name (expand-file-name dir))) | |
| 3319 create-list) | |
| 3320 (while (not (file-exists-p dir)) | |
| 3321 (setq create-list (cons dir create-list) | |
| 3322 dir (directory-file-name (file-name-directory dir)))) | |
| 3323 (while create-list | |
| 3324 (make-directory-internal (car create-list)) | |
| 3325 (setq create-list (cdr create-list)))))))) | |
| 3326 | |
| 3327 (put 'revert-buffer-function 'permanent-local t) | |
| 3328 (defvar revert-buffer-function nil | |
| 3329 "Function to use to revert this buffer, or nil to do the default. | |
| 3330 The function receives two arguments IGNORE-AUTO and NOCONFIRM, | |
| 3331 which are the arguments that `revert-buffer' received.") | |
| 3332 | |
| 3333 (put 'revert-buffer-insert-file-contents-function 'permanent-local t) | |
| 3334 (defvar revert-buffer-insert-file-contents-function nil | |
| 3335 "Function to use to insert contents when reverting this buffer. | |
| 3336 Gets two args, first the nominal file name to use, | |
| 849 | 3337 and second, t if reading the auto-save file. |
| 3338 If the current buffer contents are to be discarded, the function must do | |
| 1333 | 3339 so itself. |
| 3340 | |
| 3341 The function you specify is responsible for updating (or preserving) point.") | |
| 428 | 3342 |
| 3343 (defvar before-revert-hook nil | |
| 3344 "Normal hook for `revert-buffer' to run before reverting. | |
| 3345 If `revert-buffer-function' is used to override the normal revert | |
| 3346 mechanism, this hook is not used.") | |
| 3347 | |
| 3348 (defvar after-revert-hook nil | |
| 3349 "Normal hook for `revert-buffer' to run after reverting. | |
| 3350 Note that the hook value that it runs is the value that was in effect | |
| 3351 before reverting; that makes a difference if you have buffer-local | |
| 3352 hook functions. | |
| 3353 | |
| 3354 If `revert-buffer-function' is used to override the normal revert | |
| 3355 mechanism, this hook is not used.") | |
| 3356 | |
| 3357 (defvar revert-buffer-internal-hook nil | |
| 3358 "Don't use this.") | |
| 3359 | |
| 1333 | 3360 ;; END SYNC WITH FSF 21.2. |
| 3361 | |
| 428 | 3362 (defun revert-buffer (&optional ignore-auto noconfirm preserve-modes) |
| 3363 "Replace the buffer text with the text of the visited file on disk. | |
| 3364 This undoes all changes since the file was visited or saved. | |
| 3365 With a prefix argument, offer to revert from latest auto-save file, if | |
| 3366 that is more recent than the visited file. | |
| 3367 | |
| 849 | 3368 This command also refreshes certain special buffers that contain text |
| 3369 which doesn't come from a file, but reflects some other data base | |
| 3370 instead: for example, Dired buffers and buffer-list buffers. This is | |
| 3371 implemented by having the modes set `revert-buffer-function'. | |
| 428 | 3372 |
| 3373 When called from Lisp, the first argument is IGNORE-AUTO; only offer | |
| 3374 to revert from the auto-save file when this is nil. Note that the | |
| 3375 sense of this argument is the reverse of the prefix argument, for the | |
| 3376 sake of backward compatibility. IGNORE-AUTO is optional, defaulting | |
| 3377 to nil. | |
| 3378 | |
| 3379 Optional second argument NOCONFIRM means don't ask for confirmation at | |
| 3380 all. | |
| 3381 | |
| 3382 Optional third argument PRESERVE-MODES non-nil means don't alter | |
| 849 | 3383 the buffer's modes. Otherwise, reinitialize them using `normal-mode'. |
| 428 | 3384 |
| 3385 If the value of `revert-buffer-function' is non-nil, it is called to | |
| 3386 do all the work for this command. Otherwise, the hooks | |
| 3387 `before-revert-hook' and `after-revert-hook' are run at the beginning | |
| 3388 and the end, and if `revert-buffer-insert-file-contents-function' is | |
| 819 | 3389 non-nil, it is called instead of rereading visited file contents. |
| 3390 | |
| 849 | 3391 If the buffer-modified flag is nil, and we are not reverting from an |
| 3392 auto-save file, then compare the contents of the buffer and the file. | |
| 3393 Revert only if they differ." | |
| 428 | 3394 |
| 3395 ;; I admit it's odd to reverse the sense of the prefix argument, but | |
| 3396 ;; there is a lot of code out there which assumes that the first | |
| 3397 ;; argument should be t to avoid consulting the auto-save file, and | |
| 3398 ;; there's no straightforward way to encourage authors to notice a | |
| 3399 ;; reversal of the argument sense. So I'm just changing the user | |
| 3400 ;; interface, but leaving the programmatic interface the same. | |
| 3401 (interactive (list (not current-prefix-arg))) | |
| 3402 (if revert-buffer-function | |
| 3403 (funcall revert-buffer-function ignore-auto noconfirm) | |
| 3404 (let* ((opoint (point)) | |
| 819 | 3405 (newbuf nil) |
| 988 | 3406 (found nil) |
| 819 | 3407 (delay-prompt nil) |
| 428 | 3408 (auto-save-p (and (not ignore-auto) |
| 3409 (recent-auto-save-p) | |
| 3410 buffer-auto-save-file-name | |
| 3411 (file-readable-p buffer-auto-save-file-name) | |
| 3412 (y-or-n-p | |
| 3413 "Buffer has been auto-saved recently. Revert from auto-save file? "))) | |
| 3414 (file-name (if auto-save-p | |
| 3415 buffer-auto-save-file-name | |
| 3416 buffer-file-name))) | |
| 3417 (cond ((null file-name) | |
| 3418 (error "Buffer does not seem to be associated with any file")) | |
| 3419 ((or noconfirm | |
| 3420 (and (not (buffer-modified-p)) | |
| 988 | 3421 (dolist (rx revert-without-query found) |
| 3422 (when (string-match rx file-name) | |
| 3423 (setq found t)))) | |
| 819 | 3424 ;; If we might perform an optimized revert then we |
| 3425 ;; want to delay prompting in case we don't need to | |
| 3426 ;; do it at all | |
| 3427 (and (not auto-save-p) | |
| 3428 (not (buffer-modified-p)) | |
| 3429 (setq delay-prompt t)) | |
| 428 | 3430 (yes-or-no-p (format "Revert buffer from file %s? " |
| 3431 file-name))) | |
| 3432 (run-hooks 'before-revert-hook) | |
| 819 | 3433 ;; Only perform our optimized revert if nothing obvious |
| 3434 ;; has changed. | |
| 3435 (cond ((or auto-save-p | |
| 3436 (buffer-modified-p) | |
| 3437 (and (setq newbuf (revert-buffer-internal | |
| 3438 file-name)) | |
| 988 | 3439 (or noconfirm found |
| 838 | 3440 (and delay-prompt |
| 3441 (yes-or-no-p | |
| 3442 (format "Revert buffer from file %s? " | |
| 3443 file-name)))))) | |
| 819 | 3444 ;; If file was backed up but has changed since, |
| 3445 ;; we should make another backup. | |
| 3446 (and (not auto-save-p) | |
| 3447 (not (verify-visited-file-modtime (current-buffer))) | |
| 3448 (setq buffer-backed-up nil)) | |
| 3449 ;; Get rid of all undo records for this buffer. | |
| 3450 (or (eq buffer-undo-list t) | |
| 3451 (setq buffer-undo-list nil)) | |
| 3452 ;; Effectively copy the after-revert-hook status, | |
| 3453 ;; since after-find-file will clobber it. | |
| 3454 (let ((global-hook (default-value 'after-revert-hook)) | |
| 3455 (local-hook-p (local-variable-p 'after-revert-hook | |
| 3456 (current-buffer))) | |
| 3457 (local-hook (and (local-variable-p 'after-revert-hook | |
| 3458 (current-buffer)) | |
| 3459 after-revert-hook))) | |
| 3460 (let (buffer-read-only | |
| 3461 ;; Don't make undo records for the reversion. | |
| 3462 (buffer-undo-list t)) | |
| 3463 (if revert-buffer-insert-file-contents-function | |
| 3464 (funcall revert-buffer-insert-file-contents-function | |
| 3465 file-name auto-save-p) | |
| 3466 (if (not (file-exists-p file-name)) | |
| 3467 (error "File %s no longer exists!" file-name)) | |
| 3468 ;; Bind buffer-file-name to nil | |
| 3469 ;; so that we don't try to lock the file. | |
| 3470 (let ((buffer-file-name nil)) | |
| 3471 (or auto-save-p | |
| 3472 (unlock-buffer))) | |
| 3473 (widen) | |
| 3474 ;; When reading in an autosave, it's encoded using | |
| 3475 ;; `escape-quoted', so we need to use it. (It is always | |
| 3476 ;; safe to specify `escape-quoted': | |
| 3477 ;; | |
| 3478 ;; 1. If file-coding but no Mule, `escape-quoted' is | |
| 3479 ;; aliased to `binary'. | |
| 3480 ;; 2. If no file-coding, all coding systems devolve into | |
| 3481 ;; `binary'. | |
| 3482 ;; 3. ASCII and ISO8859-1 are encoded the same in both | |
| 3483 ;; `binary' and `escape-quoted', so they will be | |
| 3484 ;; compatible for the most part.) | |
| 3485 ;; | |
| 3486 ;; Otherwise, use coding-system-for-read if explicitly | |
| 3487 ;; given (e.g. the "Revert Buffer with Specified | |
| 3488 ;; Encoding" menu entries), or use the coding system | |
| 3489 ;; that the file was loaded as. | |
| 3490 (let* ((coding-system-for-read | |
| 3491 (if auto-save-p 'escape-quoted | |
| 3492 (or coding-system-for-read | |
| 3493 buffer-file-coding-system-when-loaded))) | |
| 3494 ;; If the bfcs wasn't changed from its original | |
| 3495 ;; value (other than possible EOL change), then we | |
| 3496 ;; should update it for the new coding system. | |
| 3497 (should-update-bfcs | |
| 3498 (eq (coding-system-base | |
| 3499 buffer-file-coding-system-when-loaded) | |
| 3500 (coding-system-base | |
| 3501 buffer-file-coding-system))) | |
| 3502 (old-bfcs buffer-file-coding-system) | |
| 3503 ;; But if the EOL was changed, match it in the new | |
| 3504 ;; value of bfcs. | |
| 3505 (adjust-eol | |
| 3506 (and should-update-bfcs | |
| 3507 (not | |
| 3508 (eq (get-coding-system | |
| 3509 buffer-file-coding-system-when-loaded) | |
| 3510 (get-coding-system | |
| 3511 buffer-file-coding-system)))))) | |
| 3512 (insert-file-contents file-name (not auto-save-p) | |
| 3513 nil nil t) | |
| 3514 (when should-update-bfcs | |
| 3515 (setq buffer-file-coding-system old-bfcs) | |
| 3516 (set-buffer-file-coding-system | |
| 3517 (if adjust-eol | |
| 3518 (coding-system-base | |
| 3519 buffer-file-coding-system-when-loaded) | |
| 771 | 3520 buffer-file-coding-system-when-loaded) |
| 4024 | 3521 (not adjust-eol) t))))) |
| 819 | 3522 (goto-char (min opoint (point-max))) |
| 3523 ;; Recompute the truename in case changes in symlinks | |
| 3524 ;; have changed the truename. | |
| 3525 ;;XEmacs: already done by insert-file-contents | |
| 3526 ;;(setq buffer-file-truename | |
| 3527 ;;(abbreviate-file-name (file-truename buffer-file-name))) | |
| 3528 (after-find-file nil nil t t preserve-modes) | |
| 3529 ;; Run after-revert-hook as it was before we reverted. | |
| 3530 (setq-default revert-buffer-internal-hook global-hook) | |
| 3531 (if local-hook-p | |
| 3532 (progn | |
| 3533 (make-local-variable 'revert-buffer-internal-hook) | |
| 3534 (setq revert-buffer-internal-hook local-hook)) | |
| 3535 (kill-local-variable 'revert-buffer-internal-hook)) | |
| 3536 (run-hooks 'revert-buffer-internal-hook))) | |
| 3537 ((null newbuf) | |
| 3538 ;; The resultant buffer is identical, alter | |
| 3539 ;; modtime, update mods and exit | |
| 3540 (set-visited-file-modtime) | |
| 2030 | 3541 (after-find-file nil nil t t t) |
| 3542 ;; We preserved modes above so fixup the local | |
| 3543 ;; variables manually | |
| 3544 (condition-case err | |
| 3545 (hack-local-variables) | |
| 3546 (error (lwarn 'local-variables 'warning | |
| 3547 "File local-variables error: %s" | |
| 3548 (error-message-string err))))) | |
| 819 | 3549 (t t)) |
| 428 | 3550 t))))) |
| 3551 | |
| 2030 | 3552 ;; #### wouldn't something like `revert-buffer-compare-with-file' be a |
| 3553 ;; better name? | |
| 3554 ;; #### why is the argument optional? | |
| 819 | 3555 (defun revert-buffer-internal (&optional file-name) |
| 849 | 3556 "Read contents of FILE-NAME into a buffer, and compare to current buffer. |
| 3557 Return nil if identical, and the new buffer if different." | |
| 3558 | |
| 819 | 3559 (let* ((newbuf (get-buffer-create " *revert*")) |
| 3714 | 3560 bmin bmax |
| 3561 ;; #### b-f-c-s is _not necessarily_ the coding system that | |
| 3562 ;; was used to read in the file. See its docstring. | |
| 3563 (coding-system buffer-file-coding-system)) | |
| 819 | 3564 (save-excursion |
| 3565 (set-buffer newbuf) | |
| 826 | 3566 (with-obsolete-variable '(before-change-function after-change-function) |
| 3567 (let (buffer-read-only | |
| 3568 (buffer-undo-list t) | |
| 3569 after-change-function | |
| 3570 after-change-functions | |
| 3571 before-change-function | |
| 3638 | 3572 before-change-functions |
| 3714 | 3573 (coding-system-for-read coding-system) |
| 3574 ) | |
| 826 | 3575 (if revert-buffer-insert-file-contents-function |
| 3576 (funcall revert-buffer-insert-file-contents-function | |
| 3577 file-name nil) | |
| 3578 (if (not (file-exists-p file-name)) | |
| 3579 (error "File %s no longer exists!" file-name)) | |
| 3580 (widen) | |
| 863 | 3581 (insert-file-contents file-name nil nil nil t) |
| 826 | 3582 (setq bmin (point-min) |
| 3583 bmax (point-max)))))) | |
| 819 | 3584 (if (not (and (eq bmin (point-min)) |
| 3585 (eq bmax (point-max)) | |
| 3586 (eq (compare-buffer-substrings | |
| 3587 newbuf bmin bmax (current-buffer) bmin bmax) 0))) | |
| 3588 newbuf | |
| 863 | 3589 (and (kill-buffer newbuf) nil)))) |
| 819 | 3590 |
| 1333 | 3591 ;; BEGIN SYNC WITH FSF 21.2. |
| 3592 | |
| 844 | 3593 (defvar recover-file-diff-program "diff" |
| 3594 "Absolute or relative name of the `diff' program used by `recover-file'.") | |
| 3595 (defvar recover-file-diff-arguments '("-c") | |
| 3596 "List of arguments (switches) to pass to `diff' by `recover-file'.") | |
| 3597 | |
| 428 | 3598 (defun recover-file (file) |
| 3599 "Visit file FILE, but get contents from its last auto-save file." | |
| 3600 ;; Actually putting the file name in the minibuffer should be used | |
| 3601 ;; only rarely. | |
| 3602 ;; Not just because users often use the default. | |
| 3603 (interactive "FRecover file: ") | |
| 3604 (setq file (expand-file-name file)) | |
| 3605 (let ((handler (or (find-file-name-handler file 'recover-file) | |
| 3606 (find-file-name-handler | |
| 3607 (let ((buffer-file-name file)) | |
| 3608 (make-auto-save-file-name)) | |
| 3609 'recover-file)))) | |
| 3610 (if handler | |
| 3611 (funcall handler 'recover-file file) | |
| 464 | 3612 (if (auto-save-file-name-p (file-name-nondirectory file)) |
| 428 | 3613 (error "%s is an auto-save file" file)) |
| 3614 (let ((file-name (let ((buffer-file-name file)) | |
| 3615 (make-auto-save-file-name)))) | |
| 3616 (cond ((if (file-exists-p file) | |
| 3617 (not (file-newer-than-file-p file-name file)) | |
| 3618 (not (file-exists-p file-name))) | |
| 3619 (error "Auto-save file %s not current" file-name)) | |
| 844 | 3620 (t |
| 3621 (save-window-excursion | |
| 464 | 3622 ;; XEmacs change: use insert-directory instead of |
| 844 | 3623 ;; calling ls directly. Add option for diff. |
| 464 | 3624 (with-output-to-temp-buffer "*Directory*" |
| 3625 (buffer-disable-undo standard-output) | |
| 3626 (save-excursion | |
| 1346 | 3627 (let ((switches |
| 3628 (declare-boundp dired-listing-switches))) | |
| 1333 | 3629 (if (file-symlink-p file) |
| 3630 (setq switches (concat switches "L"))) | |
| 3631 (set-buffer standard-output) | |
| 3632 ;; XEmacs had the following line, not in FSF. | |
| 3633 (setq default-directory (file-name-directory file)) | |
| 3634 ;; Use insert-directory-safely, not insert-directory, | |
| 3635 ;; because these files might not exist. In particular, | |
| 3636 ;; FILE might not exist if the auto-save file was for | |
| 3637 ;; a buffer that didn't visit a file, such as "*mail*". | |
| 3638 ;; The code in v20.x called `ls' directly, so we need | |
| 3639 ;; to emulate what `ls' did in that case. | |
| 3640 (insert-directory-safely file switches) | |
| 3641 (insert-directory-safely file-name switches)))) | |
| 844 | 3642 (block nil |
| 3643 (while t | |
| 3644 (case (get-user-response | |
| 3645 nil | |
| 3646 ;; Formerly included file name. Useless now that | |
| 3647 ;; we display an ls of the files, and potentially | |
| 3648 ;; fills up the minibuffer, esp. with autosaves | |
| 3649 ;; all in one directory. | |
| 3650 "Recover auto save file? " | |
| 3651 '(("yes" "%_Yes" yes) | |
| 3652 ("no" "%_No" no) | |
| 3653 ("diff" "%_Diff" diff))) | |
| 3654 (no (error "Recover-file cancelled.")) | |
| 3655 (yes | |
| 3656 (switch-to-buffer (find-file-noselect file t)) | |
| 1333 | 3657 (let ((buffer-read-only nil) |
| 3658 ;; Keep the current buffer-file-coding-system. | |
| 3659 (coding-system buffer-file-coding-system) | |
| 3660 ;; Auto-saved file shoule be read without any code conversion. | |
| 3661 (coding-system-for-read 'escape-quoted)) | |
| 844 | 3662 (erase-buffer) |
| 1333 | 3663 (insert-file-contents file-name nil) |
| 4024 | 3664 (set-buffer-file-coding-system coding-system |
| 3665 nil t)) | |
| 844 | 3666 (after-find-file nil nil t) |
| 3667 (return nil)) | |
| 3668 (diff | |
| 3669 ;; rather than just diff the two files (which would | |
| 3670 ;; be easy), we have to deal with the fact that | |
| 3671 ;; they may be in different formats, since | |
| 3672 ;; auto-saves are always in escape-quoted. so, we | |
| 3673 ;; read the file into a buffer (#### should we look | |
| 3674 ;; at or use a file if it's already in a buffer? | |
| 3675 ;; maybe we would find hints as to the encoding of | |
| 3676 ;; the file?), then we save the resulting buffer in | |
| 3677 ;; escape-quoted, do the diff (between two files | |
| 3678 ;; both in escape-quoted) and read in the results | |
| 3679 ;; using coding system escape-quoted. That way, we | |
| 3680 ;; should get what's correct most of the time. | |
| 3681 (let ((buffer (generate-new-buffer "*recover*")) | |
| 3682 (temp | |
| 3683 (make-temp-name | |
| 3684 (concat (file-name-as-directory | |
| 3685 (temp-directory)) | |
| 3686 (file-name-nondirectory file) "-")))) | |
| 3687 (unwind-protect | |
| 3688 (progn | |
| 3689 (save-current-buffer | |
| 3690 (set-buffer buffer) | |
| 3691 (insert-file-contents file) | |
| 3692 (let ((coding-system-for-write | |
| 3693 'escape-quoted)) | |
| 3694 (write-region (point-min) (point-max) | |
| 3695 temp nil 'silent))) | |
| 3696 (with-output-to-temp-buffer "*Autosave Diff*" | |
| 3697 (buffer-disable-undo standard-output) | |
| 3698 (let ((coding-system-for-read | |
| 3699 'escape-quoted)) | |
| 3700 (condition-case ferr | |
| 3701 (apply #'call-process | |
| 3702 recover-file-diff-program | |
| 3703 nil standard-output nil | |
| 3704 (append | |
| 3705 recover-file-diff-arguments | |
| 3706 (list temp file-name))) | |
| 3707 (io-error | |
| 3708 (save-excursion | |
| 1346 | 3709 (let ((switches |
| 3710 (declare-boundp | |
| 3711 dired-listing-switches))) | |
| 1333 | 3712 (if (file-symlink-p file) |
| 3713 (setq switches (concat switches "L"))) | |
| 3714 (set-buffer standard-output) | |
| 3715 ;; XEmacs had the following line, not in FSF. | |
| 3716 (setq default-directory (file-name-directory file)) | |
| 1346 | 3717 ;; Use insert-directory-safely, |
| 3718 ;; not insert-directory, because | |
| 3719 ;; these files might not exist. | |
| 3720 ;; In particular, FILE might not | |
| 3721 ;; exist if the auto-save file | |
| 3722 ;; was for a buffer that didn't | |
| 3723 ;; visit a file, such as | |
| 3724 ;; "*mail*". The code in v20.x | |
| 3725 ;; called `ls' directly, so we | |
| 3726 ;; need to emulate what `ls' did | |
| 3727 ;; in that case. | |
| 1333 | 3728 (insert-directory-safely file switches) |
| 3729 (insert-directory-safely file-name switches)) | |
| 844 | 3730 (terpri) |
| 3731 (princ "Error during diff: ") | |
| 3732 (display-error ferr | |
| 3733 standard-output))))))) | |
| 3734 (ignore-errors (kill-buffer buffer)) | |
| 3735 (ignore-file-errors | |
| 3736 (delete-file temp))))))))))))))) | |
| 428 | 3737 |
| 3738 (defun recover-session () | |
| 3739 "Recover auto save files from a previous Emacs session. | |
| 3740 This command first displays a Dired buffer showing you the | |
| 3741 previous sessions that you could recover from. | |
| 3742 To choose one, move point to the proper line and then type C-c C-c. | |
| 3743 Then you'll be asked about a number of files to recover." | |
| 3744 (interactive) | |
| 3745 (unless (fboundp 'dired) | |
| 3746 (error "recover-session requires dired")) | |
| 3747 (if (null auto-save-list-file-prefix) | |
| 3748 (error | |
| 3749 "You set `auto-save-list-file-prefix' to disable making session files")) | |
| 1333 | 3750 (let ((dir (file-name-directory auto-save-list-file-prefix))) |
| 3751 (unless (file-directory-p dir) | |
| 3752 (make-directory dir t))) | |
| 851 | 3753 (let* ((auto-save-list-dir |
| 3754 (file-name-directory auto-save-list-file-prefix)) | |
| 3755 (files (directory-files | |
| 3756 auto-save-list-dir | |
| 3757 t | |
| 3758 (concat "^" (regexp-quote (file-name-nondirectory | |
| 3759 auto-save-list-file-prefix))))) | |
| 3760 (files (sort (delete-if-not #'Recover-session-files-from-auto-save-list-file | |
| 3761 files) #'file-newer-than-file-p))) | |
| 3762 (unless files | |
| 3763 (error "No sessions can be recovered now")) | |
| 3764 (declare-fboundp (dired (cons auto-save-list-dir files))) | |
| 1333 | 3765 (save-excursion |
| 3766 (goto-char (point-min)) | |
| 3767 (or (looking-at "Move to the session you want to recover,") | |
| 3768 (let ((inhibit-read-only t)) | |
| 3769 (delete-matching-lines "^[ \t]*total.*$") | |
| 3770 (insert "Move to the session you want to recover,\n" | |
| 3771 "then type C-c C-c to select it.\n\n" | |
| 3772 "You can also delete some of these files;\n" | |
| 3773 "type d on a line to mark that file for deletion.\n\n")))) | |
| 851 | 3774 (use-local-map (let ((map (make-sparse-keymap))) |
| 3775 (set-keymap-parents map (list (current-local-map))) | |
| 3776 map)) | |
| 3777 (define-key (current-local-map) "\C-c\C-c" 'recover-session-finish))) | |
| 428 | 3778 |
| 851 | 3779 (defun Recover-session-files-from-auto-save-list-file (file) |
| 3780 "Return the auto save files in list file FILE that are current." | |
| 3781 (let (files | |
| 428 | 3782 (buffer (get-buffer-create " *recover*"))) |
| 3783 (unwind-protect | |
| 3784 (save-excursion | |
| 3785 ;; Read in the auto-save-list file. | |
| 3786 (set-buffer buffer) | |
| 3787 (erase-buffer) | |
| 771 | 3788 (let ((coding-system-for-read 'escape-quoted)) |
| 3789 (insert-file-contents file)) | |
| 428 | 3790 ;; Loop thru the text of that file |
| 3791 ;; and get out the names of the files to recover. | |
| 3792 (while (not (eobp)) | |
| 3793 (let (thisfile autofile) | |
| 3794 (if (eolp) | |
| 3795 ;; This is a pair of lines for a non-file-visiting buffer. | |
| 3796 ;; Get the auto-save file name and manufacture | |
| 3797 ;; a "visited file name" from that. | |
| 3798 (progn | |
| 3799 (forward-line 1) | |
| 3800 (setq autofile | |
| 3801 (buffer-substring-no-properties | |
| 3802 (point) | |
| 3803 (save-excursion | |
| 3804 (end-of-line) | |
| 3805 (point)))) | |
| 3806 (setq thisfile | |
| 3807 (expand-file-name | |
| 3808 (substring | |
| 3809 (file-name-nondirectory autofile) | |
| 3810 1 -1) | |
| 3811 (file-name-directory autofile))) | |
| 3812 (forward-line 1)) | |
| 3813 ;; This pair of lines is a file-visiting | |
| 3814 ;; buffer. Use the visited file name. | |
| 3815 (progn | |
| 3816 (setq thisfile | |
| 3817 (buffer-substring-no-properties | |
| 3818 (point) (progn (end-of-line) (point)))) | |
| 3819 (forward-line 1) | |
| 3820 (setq autofile | |
| 3821 (buffer-substring-no-properties | |
| 3822 (point) (progn (end-of-line) (point)))) | |
| 3823 (forward-line 1))) | |
| 3824 ;; Ignore a file if its auto-save file does not exist now. | |
| 3825 (if (file-exists-p autofile) | |
| 3826 (setq files (cons thisfile files))))) | |
| 851 | 3827 (setq files (nreverse files))) |
| 428 | 3828 (kill-buffer buffer)))) |
| 3829 | |
| 851 | 3830 (defun recover-session-finish () |
| 3831 "Choose one saved session to recover auto-save files from. | |
| 3832 This command is used in the special Dired buffer created by | |
| 3833 \\[recover-session]." | |
| 3834 (interactive) | |
| 3835 ;; Get the name of the session file to recover from. | |
| 3836 (let ((file (declare-fboundp (dired-get-filename)))) | |
| 1346 | 3837 (declare-fboundp (dired-unmark 1)) |
| 851 | 3838 ;; #### dired-do-flagged-delete in FSF. |
| 3839 ;; This version is for ange-ftp | |
| 1346 | 3840 ;;(declare-fboundp (dired-do-deletions t)) |
| 851 | 3841 ;; This version is for efs |
| 3842 (declare-fboundp (dired-expunge-deletions)) | |
| 3843 (let ((files (Recover-session-files-from-auto-save-list-file file))) | |
| 3844 ;; The file contains a pair of line for each auto-saved buffer. | |
| 3845 ;; The first line of the pair contains the visited file name | |
| 3846 ;; or is empty if the buffer was not visiting a file. | |
| 3847 ;; The second line is the auto-save file name. | |
| 3848 (if files | |
| 3849 (map-y-or-n-p "Recover %s? " | |
| 3850 (lambda (file) | |
| 3851 (condition-case nil | |
| 3852 (save-excursion (recover-file file)) | |
| 3853 (error | |
| 3854 (lwarn 'recover 'alert | |
| 3855 "Failed to recover `%s'" file)))) | |
| 3856 files | |
| 3857 '("file" "files" "recover")) | |
| 3858 (message "No files can be recovered from this session now"))))) | |
| 3859 | |
| 428 | 3860 (defun kill-some-buffers (&optional list) |
| 3861 "For each buffer in LIST, ask whether to kill it. | |
| 3862 LIST defaults to all existing live buffers." | |
| 3863 (interactive) | |
| 3864 (if (null list) | |
| 3865 (setq list (buffer-list))) | |
| 3866 (while list | |
| 3867 (let* ((buffer (car list)) | |
| 3868 (name (buffer-name buffer))) | |
| 3869 (and (not (string-equal name "")) | |
| 1333 | 3870 (not (eq (aref name 0) ?\ )) |
| 428 | 3871 (yes-or-no-p |
| 3872 (format | |
| 3873 (if (buffer-modified-p buffer) | |
| 3874 (gettext "Buffer %s HAS BEEN EDITED. Kill? ") | |
| 3875 (gettext "Buffer %s is unmodified. Kill? ")) | |
| 3876 name)) | |
| 3877 (kill-buffer buffer))) | |
| 3878 (setq list (cdr list)))) | |
| 3879 | |
| 3880 (defun auto-save-mode (arg) | |
| 3881 "Toggle auto-saving of contents of current buffer. | |
| 3882 With prefix argument ARG, turn auto-saving on if positive, else off." | |
| 3883 (interactive "P") | |
| 3884 (setq buffer-auto-save-file-name | |
| 3885 (and (if (null arg) | |
| 3886 (or (not buffer-auto-save-file-name) | |
| 3887 ;; If autosave is off because buffer has shrunk, | |
| 3888 ;; then toggling should turn it on. | |
| 3889 (< buffer-saved-size 0)) | |
| 3890 (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) | |
| 3891 (if (and buffer-file-name auto-save-visited-file-name | |
| 3892 (not buffer-read-only)) | |
| 3893 buffer-file-name | |
| 3894 (make-auto-save-file-name)))) | |
| 3895 ;; If -1 was stored here, to temporarily turn off saving, | |
| 3896 ;; turn it back on. | |
| 3897 (and (< buffer-saved-size 0) | |
| 3898 (setq buffer-saved-size 0)) | |
| 3899 (if (interactive-p) | |
| 3900 (if buffer-auto-save-file-name ;; rewritten for I18N3 snarfing | |
| 3901 (display-message 'command "Auto-save on (in this buffer)") | |
| 3902 (display-message 'command "Auto-save off (in this buffer)"))) | |
| 3903 buffer-auto-save-file-name) | |
| 3904 | |
| 3905 (defun rename-auto-save-file () | |
| 3906 "Adjust current buffer's auto save file name for current conditions. | |
| 3907 Also rename any existing auto save file, if it was made in this session." | |
| 3908 (let ((osave buffer-auto-save-file-name)) | |
| 3909 (setq buffer-auto-save-file-name | |
| 3910 (make-auto-save-file-name)) | |
| 3911 (if (and osave buffer-auto-save-file-name | |
| 3912 (not (string= buffer-auto-save-file-name buffer-file-name)) | |
| 3913 (not (string= buffer-auto-save-file-name osave)) | |
| 3914 (file-exists-p osave) | |
| 3915 (recent-auto-save-p)) | |
| 3916 (rename-file osave buffer-auto-save-file-name t)))) | |
| 3917 | |
| 1333 | 3918 ;; END SYNC WITH FSF 21.2. |
| 3919 | |
| 464 | 3920 ;; make-auto-save-file-name and auto-save-file-name-p are now only in |
| 3921 ;; auto-save.el. | |
| 428 | 3922 |
| 3923 | |
| 1333 | 3924 ;; BEGIN SYNC WITH FSF 21.2. |
| 3925 | |
| 428 | 3926 (defun wildcard-to-regexp (wildcard) |
| 3927 "Given a shell file name pattern WILDCARD, return an equivalent regexp. | |
| 3928 The generated regexp will match a filename iff the filename | |
| 3929 matches that wildcard according to shell rules. Only wildcards known | |
| 3930 by `sh' are supported." | |
| 3931 (let* ((i (string-match "[[.*+\\^$?]" wildcard)) | |
| 3932 ;; Copy the initial run of non-special characters. | |
| 3933 (result (substring wildcard 0 i)) | |
| 3934 (len (length wildcard))) | |
| 3935 ;; If no special characters, we're almost done. | |
| 3936 (if i | |
| 3937 (while (< i len) | |
| 3938 (let ((ch (aref wildcard i)) | |
| 3939 j) | |
| 3940 (setq | |
| 3941 result | |
| 3942 (concat result | |
| 3943 (cond | |
| 1333 | 3944 ((and (eq ch ?\[) |
| 3945 (< (1+ i) len) | |
| 3946 (eq (aref wildcard (1+ i)) ?\])) | |
| 3947 "\\[") | |
| 428 | 3948 ((eq ch ?\[) ; [...] maps to regexp char class |
| 3949 (progn | |
| 3950 (setq i (1+ i)) | |
| 3951 (concat | |
| 3952 (cond | |
| 3953 ((eq (aref wildcard i) ?!) ; [!...] -> [^...] | |
| 3954 (progn | |
| 3955 (setq i (1+ i)) | |
| 3956 (if (eq (aref wildcard i) ?\]) | |
| 3957 (progn | |
| 3958 (setq i (1+ i)) | |
| 3959 "[^]") | |
| 3960 "[^"))) | |
| 3961 ((eq (aref wildcard i) ?^) | |
| 3962 ;; Found "[^". Insert a `\0' character | |
| 3963 ;; (which cannot happen in a filename) | |
| 3964 ;; into the character class, so that `^' | |
| 3965 ;; is not the first character after `[', | |
| 3966 ;; and thus non-special in a regexp. | |
| 3967 (progn | |
| 3968 (setq i (1+ i)) | |
| 3969 "[\000^")) | |
| 3970 ((eq (aref wildcard i) ?\]) | |
| 3971 ;; I don't think `]' can appear in a | |
| 3972 ;; character class in a wildcard, but | |
| 3973 ;; let's be general here. | |
| 3974 (progn | |
| 3975 (setq i (1+ i)) | |
| 3976 "[]")) | |
| 3977 (t "[")) | |
| 3978 (prog1 ; copy everything upto next `]'. | |
| 3979 (substring wildcard | |
| 3980 i | |
| 3981 (setq j (string-match | |
| 3982 "]" wildcard i))) | |
| 3983 (setq i (if j (1- j) (1- len))))))) | |
| 3984 ((eq ch ?.) "\\.") | |
| 3985 ((eq ch ?*) "[^\000]*") | |
| 3986 ((eq ch ?+) "\\+") | |
| 3987 ((eq ch ?^) "\\^") | |
| 3988 ((eq ch ?$) "\\$") | |
| 3989 ((eq ch ?\\) "\\\\") ; probably cannot happen... | |
| 3990 ((eq ch ??) "[^\000]") | |
| 3991 (t (char-to-string ch))))) | |
| 3992 (setq i (1+ i))))) | |
| 3993 ;; Shell wildcards should match the entire filename, | |
| 3994 ;; not its part. Make the regexp say so. | |
| 3995 (concat "\\`" result "\\'"))) | |
| 3996 | |
| 3997 (defcustom list-directory-brief-switches "-CF" | |
| 3998 "*Switches for list-directory to pass to `ls' for brief listing." | |
| 3999 :type 'string | |
| 4000 :group 'dired) | |
| 4001 | |
| 4002 (defcustom list-directory-verbose-switches "-l" | |
| 4003 "*Switches for list-directory to pass to `ls' for verbose listing," | |
| 4004 :type 'string | |
| 4005 :group 'dired) | |
| 4006 | |
| 1333 | 4007 (defun file-expand-wildcards (pattern &optional full) |
| 4008 "Expand wildcard pattern PATTERN. | |
| 4009 This returns a list of file names which match the pattern. | |
| 4010 | |
| 4011 If PATTERN is written as an absolute relative file name, | |
| 4012 the values are absolute also. | |
| 4013 | |
| 4014 If PATTERN is written as a relative file name, it is interpreted | |
| 4015 relative to the current default directory, `default-directory'. | |
| 4016 The file names returned are normally also relative to the current | |
| 4017 default directory. However, if FULL is non-nil, they are absolute." | |
| 4018 (let* ((nondir (file-name-nondirectory pattern)) | |
| 4019 (dirpart (file-name-directory pattern)) | |
| 4020 ;; A list of all dirs that DIRPART specifies. | |
| 4021 ;; This can be more than one dir | |
| 4022 ;; if DIRPART contains wildcards. | |
| 4023 (dirs (if (and dirpart (string-match "[[*?]" dirpart)) | |
| 4024 (mapcar 'file-name-as-directory | |
| 4025 (file-expand-wildcards (directory-file-name dirpart))) | |
| 4026 (list dirpart))) | |
| 4027 contents) | |
| 4028 (while dirs | |
| 4029 (when (or (null (car dirs)) ; Possible if DIRPART is not wild. | |
| 4030 (file-directory-p (directory-file-name (car dirs)))) | |
| 4031 (let ((this-dir-contents | |
| 4032 ;; Filter out "." and ".." | |
| 4033 (delq nil | |
| 4034 (mapcar #'(lambda (name) | |
| 4035 (unless (string-match "\\`\\.\\.?\\'" | |
| 4036 (file-name-nondirectory name)) | |
| 4037 name)) | |
| 4038 (directory-files (or (car dirs) ".") full | |
| 4039 (wildcard-to-regexp nondir)))))) | |
| 4040 (setq contents | |
| 4041 (nconc | |
| 4042 (if (and (car dirs) (not full)) | |
| 4043 (mapcar (function (lambda (name) (concat (car dirs) name))) | |
| 4044 this-dir-contents) | |
| 4045 this-dir-contents) | |
| 4046 contents)))) | |
| 4047 (setq dirs (cdr dirs))) | |
| 4048 contents)) | |
| 4049 | |
| 428 | 4050 (defun list-directory (dirname &optional verbose) |
| 4051 "Display a list of files in or matching DIRNAME, a la `ls'. | |
| 4052 DIRNAME is globbed by the shell if necessary. | |
| 4053 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. | |
| 4054 Actions controlled by variables `list-directory-brief-switches' | |
| 4055 and `list-directory-verbose-switches'." | |
| 4056 (interactive (let ((pfx current-prefix-arg)) | |
| 4057 (list (read-file-name (if pfx (gettext "List directory (verbose): ") | |
| 4058 (gettext "List directory (brief): ")) | |
| 4059 nil default-directory nil) | |
| 4060 pfx))) | |
| 4061 (let ((switches (if verbose list-directory-verbose-switches | |
| 4062 list-directory-brief-switches))) | |
| 4063 (or dirname (setq dirname default-directory)) | |
| 4064 (setq dirname (expand-file-name dirname)) | |
| 4065 (with-output-to-temp-buffer "*Directory*" | |
| 4066 (buffer-disable-undo standard-output) | |
| 4067 (princ "Directory ") | |
| 4068 (princ dirname) | |
| 4069 (terpri) | |
| 4070 (save-excursion | |
| 4071 (set-buffer "*Directory*") | |
| 1333 | 4072 (setq default-directory |
| 4073 (if (file-directory-p dirname) | |
| 4074 (file-name-as-directory dirname) | |
| 4075 (file-name-directory dirname))) | |
| 428 | 4076 (let ((wildcard (not (file-directory-p dirname)))) |
| 4077 (insert-directory dirname switches wildcard (not wildcard))))))) | |
| 4078 | |
| 1333 | 4079 (defun shell-quote-wildcard-pattern (pattern) |
| 4080 "Quote characters special to the shell in PATTERN, leave wildcards alone. | |
| 4081 | |
| 4082 PATTERN is assumed to represent a file-name wildcard suitable for the | |
| 4083 underlying filesystem. For Unix and GNU/Linux, the characters from the | |
| 4084 set [ \\t\\n;<>&|()#$] are quoted with a backslash; for DOS/Windows, all | |
| 4085 the parts of the pattern which don't include wildcard characters are | |
| 4086 quoted with double quotes. | |
| 4087 Existing quote characters in PATTERN are left alone, so you can pass | |
| 4088 PATTERN that already quotes some of the special characters." | |
| 4089 (save-match-data | |
| 4090 (cond | |
| 4091 ((memq system-type '(ms-dos windows-nt)) | |
| 4092 ;; DOS/Windows don't allow `"' in file names. So if the | |
| 4093 ;; argument has quotes, we can safely assume it is already | |
| 4094 ;; quoted by the caller. | |
| 4095 (if (or (string-match "[\"]" pattern) | |
| 4096 ;; We quote [&()#$'] in case their shell is a port of a | |
| 4097 ;; Unixy shell. We quote [,=+] because stock DOS and | |
| 4098 ;; Windows shells require that in some cases, such as | |
| 4099 ;; passing arguments to batch files that use positional | |
| 4100 ;; arguments like %1. | |
| 4101 (not (string-match "[ \t;&()#$',=+]" pattern))) | |
| 4102 pattern | |
| 4103 (let ((result "\"") | |
| 4104 (beg 0) | |
| 4105 end) | |
| 4106 (while (string-match "[*?]+" pattern beg) | |
| 4107 (setq end (match-beginning 0) | |
| 4108 result (concat result (substring pattern beg end) | |
| 4109 "\"" | |
| 4110 (substring pattern end (match-end 0)) | |
| 4111 "\"") | |
| 4112 beg (match-end 0))) | |
| 4113 (concat result (substring pattern beg) "\"")))) | |
| 4114 (t | |
| 4115 (let ((beg 0)) | |
| 4116 (while (string-match "[ \t\n;<>&|()#$]" pattern beg) | |
| 4117 (setq pattern | |
| 4118 (concat (substring pattern 0 (match-beginning 0)) | |
| 4119 "\\" | |
| 4120 (substring pattern (match-beginning 0))) | |
| 4121 beg (1+ (match-end 0))))) | |
| 4122 pattern)))) | |
| 4123 | |
| 4124 | |
| 428 | 4125 (defvar insert-directory-program "ls" |
| 4126 "Absolute or relative name of the `ls' program used by `insert-directory'.") | |
| 4127 | |
| 4128 ;; insert-directory | |
| 4129 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and | |
| 4130 ;; FULL-DIRECTORY-P is nil. | |
| 4131 ;; The single line of output must display FILE's name as it was | |
| 4132 ;; given, namely, an absolute path name. | |
| 4133 ;; - must insert exactly one line for each file if WILDCARD or | |
| 4134 ;; FULL-DIRECTORY-P is t, plus one optional "total" line | |
| 4135 ;; before the file lines, plus optional text after the file lines. | |
| 4136 ;; Lines are delimited by "\n", so filenames containing "\n" are not | |
| 4137 ;; allowed. | |
| 4138 ;; File lines should display the basename. | |
| 4139 ;; - must be consistent with | |
| 4140 ;; - functions dired-move-to-filename, (these two define what a file line is) | |
| 4141 ;; dired-move-to-end-of-filename, | |
| 4142 ;; dired-between-files, (shortcut for (not (dired-move-to-filename))) | |
| 4143 ;; dired-insert-headerline | |
| 4144 ;; dired-after-subdir-garbage (defines what a "total" line is) | |
| 4145 ;; - variable dired-subdir-regexp | |
| 1606 | 4146 ;; - may be passed "--dired" as argument in SWITCHES. |
| 4147 ;; Filename handlers might have to remove this switch if their | |
| 4148 ;; "ls" command does not support it. | |
| 1333 | 4149 |
| 4150 ;; END SYNC WITH FSF 21.2. | |
| 4151 | |
| 2671 | 4152 (defvar insert-directory-ls-version 'unknown) |
| 4153 | |
| 428 | 4154 (defun insert-directory (file switches &optional wildcard full-directory-p) |
| 4155 "Insert directory listing for FILE, formatted according to SWITCHES. | |
| 4156 Leaves point after the inserted text. | |
| 4157 SWITCHES may be a string of options, or a list of strings. | |
| 4158 Optional third arg WILDCARD means treat FILE as shell wildcard. | |
| 4159 Optional fourth arg FULL-DIRECTORY-P means file is a directory and | |
| 4160 switches do not contain `d', so that a full listing is expected. | |
| 4161 | |
| 4162 This works by running a directory listing program | |
| 4163 whose name is in the variable `insert-directory-program'. | |
| 4164 If WILDCARD, it also runs the shell specified by `shell-file-name'." | |
| 4165 ;; We need the directory in order to find the right handler. | |
| 4166 (let ((handler (find-file-name-handler (expand-file-name file) | |
| 4167 'insert-directory))) | |
| 1606 | 4168 (cond |
| 4169 (handler | |
| 4170 (funcall handler 'insert-directory file switches | |
| 4171 wildcard full-directory-p)) | |
| 4172 ;; [mswindows-insert-directory should be called | |
| 4173 ;; nt-insert-directory - kkm]. not true any more according to | |
| 4174 ;; my new naming scheme. --ben | |
| 4175 ((and (fboundp 'mswindows-insert-directory) | |
| 4176 (eq system-type 'windows-nt)) | |
| 4177 (declare-fboundp (mswindows-insert-directory | |
| 4178 file switches wildcard full-directory-p))) | |
| 4179 (t | |
| 4180 (let* ((beg (point)) | |
|
4400
555e21a66d51
2008-01-13 Michael Sperber <mike@xemacs.org>
Mike Sperber <sperber@deinprogramm.de>
parents:
4266
diff
changeset
|
4181 ;; on Unix, assume that ls will output in what the |
|
555e21a66d51
2008-01-13 Michael Sperber <mike@xemacs.org>
Mike Sperber <sperber@deinprogramm.de>
parents:
4266
diff
changeset
|
4182 ;; file-name coding system specifies |
|
555e21a66d51
2008-01-13 Michael Sperber <mike@xemacs.org>
Mike Sperber <sperber@deinprogramm.de>
parents:
4266
diff
changeset
|
4183 (coding-system-for-read (get-coding-system 'file-name)) |
| 1606 | 4184 (result |
| 4185 (if wildcard | |
| 4186 ;; Run ls in the directory of the file pattern we asked for. | |
| 4187 (let ((default-directory | |
| 4188 (if (file-name-absolute-p file) | |
| 4189 (file-name-directory file) | |
| 4190 (file-name-directory (expand-file-name file)))) | |
| 4191 (pattern (file-name-nondirectory file)) | |
| 4192 (start 0)) | |
| 4193 ;; Quote some characters that have special meanings in shells; | |
| 4194 ;; but don't quote the wildcards--we want them to be special. | |
| 4195 ;; We also currently don't quote the quoting characters | |
| 4196 ;; in case people want to use them explicitly to quote | |
| 4197 ;; wildcard characters. | |
| 4198 ;;#### Unix-specific | |
| 4199 (while (string-match "[ \t\n;<>&|()#$]" pattern start) | |
| 4200 (setq pattern | |
| 4201 (concat (substring pattern 0 (match-beginning 0)) | |
| 4202 "\\" | |
| 4203 (substring pattern (match-beginning 0))) | |
| 4204 start (1+ (match-end 0)))) | |
| 4205 (call-process shell-file-name nil t nil | |
| 4206 "-c" (concat "\\" ;; Disregard shell aliases! | |
| 4207 insert-directory-program | |
| 4208 " -d " | |
| 4209 (if (stringp switches) | |
| 4210 switches | |
| 4211 (mapconcat 'identity switches " ")) | |
| 4212 " " | |
| 4213 pattern))) | |
| 4214 ;; SunOS 4.1.3, SVr4 and others need the "." to list the | |
| 4215 ;; directory if FILE is a symbolic link. | |
| 4216 (apply 'call-process | |
| 4217 insert-directory-program nil t nil | |
| 4218 (let (list) | |
| 4219 (if (listp switches) | |
| 4220 (setq list switches) | |
| 4221 (if (not (equal switches "")) | |
| 4222 (let ((switches switches)) | |
| 4223 ;; Split the switches at any spaces | |
| 4224 ;; so we can pass separate options as separate args. | |
| 4225 (while (string-match " " switches) | |
| 4226 (setq list (cons (substring switches 0 (match-beginning 0)) | |
| 4227 list) | |
| 4228 switches (substring switches (match-end 0)))) | |
| 4229 (setq list (cons switches list))))) | |
| 4230 (append list | |
| 4231 (list | |
| 4232 (if full-directory-p | |
| 4233 (concat (file-name-as-directory file) | |
| 4234 ;;#### Unix-specific | |
| 4235 ".") | |
| 4236 file)))))))) | |
| 2671 | 4237 |
| 4238 ;; If we got "//DIRED//" in the output, it means we got a real | |
| 4239 ;; directory listing, even if `ls' returned nonzero. | |
| 4240 ;; So ignore any errors. | |
| 4241 (when (if (stringp switches) | |
| 4242 (string-match "--dired\\>" switches) | |
| 4243 (member "--dired" switches)) | |
| 4244 (save-excursion | |
| 4245 (forward-line -2) | |
| 4246 (when (looking-at "//SUBDIRED//") | |
| 4247 (forward-line -1)) | |
| 4248 (if (looking-at "//DIRED//") | |
| 4249 (setq result 0)))) | |
| 4250 | |
| 4251 (when (and (not (eq 0 result)) | |
| 4252 (eq insert-directory-ls-version 'unknown)) | |
| 4253 ;; The first time ls returns an error, | |
| 4254 ;; find the version numbers of ls, | |
| 4255 ;; and set insert-directory-ls-version | |
| 4256 ;; to > if it is more than 5.2.1, < if it is less, nil if it | |
| 4257 ;; is equal or if the info cannot be obtained. | |
| 4258 ;; (That can mean it isn't GNU ls.) | |
| 4259 (let ((version-out | |
| 4260 (with-temp-buffer | |
| 4261 (call-process "ls" nil t nil "--version") | |
| 4262 (buffer-string)))) | |
| 4263 (if (string-match "ls (.*utils) \\([0-9.]*\\)$" version-out) | |
| 4264 (let* ((version (match-string 1 version-out)) | |
| 4265 (split (split-string version "[.]")) | |
| 4266 (numbers (mapcar 'string-to-int split)) | |
| 4267 (min '(5 2 1)) | |
| 4268 comparison) | |
| 4269 (while (and (not comparison) (or numbers min)) | |
| 4270 (cond ((null min) | |
| 4271 (setq comparison '>)) | |
| 4272 ((null numbers) | |
| 4273 (setq comparison '<)) | |
| 4274 ((> (car numbers) (car min)) | |
| 4275 (setq comparison '>)) | |
| 4276 ((< (car numbers) (car min)) | |
| 4277 (setq comparison '<)) | |
| 4278 (t | |
| 4279 (setq numbers (cdr numbers) | |
| 4280 min (cdr min))))) | |
| 4281 (setq insert-directory-ls-version (or comparison '=))) | |
| 4282 (setq insert-directory-ls-version nil)))) | |
| 4283 | |
| 4284 ;; For GNU ls versions 5.2.2 and up, ignore minor errors. | |
| 4285 (when (and (eq 1 result) (eq insert-directory-ls-version '>)) | |
| 4286 (setq result 0)) | |
| 4287 | |
| 1606 | 4288 ;; If `insert-directory-program' failed, signal an error. |
| 2671 | 4289 (unless (eq 0 result) |
| 4290 ;; Delete the error message it may have output. | |
| 4291 (delete-region beg (point)) | |
| 4292 ;; On non-Posix systems, we cannot open a directory, so | |
| 4293 ;; don't even try, because that will always result in | |
| 4294 ;; the ubiquitous "Access denied". Instead, show the | |
| 4295 ;; command line so the user can try to guess what went wrong. | |
| 4296 (if (and (file-directory-p file) | |
| 4297 (memq system-type '(ms-dos windows-nt))) | |
| 4298 (error | |
| 4299 "Reading directory: \"%s %s -- %s\" exited with status %s" | |
| 4300 insert-directory-program | |
| 4301 (if (listp switches) (concat switches) switches) | |
| 4302 file result) | |
| 4303 (error "Listing directory failed"))) | |
| 1606 | 4304 |
| 4305 (when (or (and (listp switches) | |
| 4306 (member "--dired" switches)) | |
| 4307 (string-match "--dired\\>" switches)) | |
| 4308 (forward-line -2) | |
| 4309 (when (looking-at "//SUBDIRED//") | |
| 4310 (delete-region (point) (progn (forward-line 1) (point))) | |
| 4311 (forward-line -1)) | |
| 2671 | 4312 (if (looking-at "//DIRED//") |
| 4313 (let ((end (line-end-position)) | |
| 4314 (linebeg (point)) | |
| 4315 error-lines) | |
| 4316 ;; Find all the lines that are error messages, | |
| 4317 ;; and record the bounds of each one. | |
| 4318 (goto-char beg) | |
| 4319 (while (< (point) linebeg) | |
| 4320 (or (eql (following-char) ?\s) | |
| 4321 (push (list (point) (line-end-position)) error-lines)) | |
| 4322 (forward-line 1)) | |
| 4323 (setq error-lines (nreverse error-lines)) | |
| 4324 ;; Now read the numeric positions of file names. | |
| 4325 (goto-char linebeg) | |
| 4326 (forward-word 1) | |
| 4327 (forward-char 3) | |
| 4328 (while (< (point) end) | |
| 4329 (let ((start (insert-directory-adj-pos | |
| 4330 (+ beg (read (current-buffer))) | |
| 4331 error-lines)) | |
| 4332 (end (insert-directory-adj-pos | |
| 4333 (+ beg (read (current-buffer))) | |
| 4334 error-lines))) | |
| 4335 (if (memq (char-after end) '(?\n ?\ )) | |
| 4336 ;; End is followed by \n or by " -> ". | |
| 4337 (let ((filename-extent (make-extent start end))) | |
| 4338 (set-extent-property filename-extent 'dired-file-name t) | |
| 4339 (set-extent-property filename-extent 'start-open t) | |
| 4340 (set-extent-property filename-extent 'end-open t)) | |
| 4341 ;; It seems that we can't trust ls's output as to | |
| 4342 ;; byte positions of filenames. | |
| 4343 (map-extents | |
| 4344 #'(lambda (extent maparg) | |
| 4345 (delete-extent extent) | |
| 4346 nil) | |
| 4347 nil beg (point) nil nil 'dired-file-name) | |
| 4348 (end-of-line)))) | |
| 4349 (goto-char end) | |
| 4350 (beginning-of-line) | |
| 4351 (delete-region (point) (progn (forward-line 1) (point)))) | |
| 4352 ;; Take care of the case where the ls output contains a | |
| 4353 ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line | |
| 4354 ;; and we went one line too far back (see above). | |
| 4355 (forward-line 1)) | |
| 4356 (if (looking-at "//DIRED-OPTIONS//") | |
| 4357 (delete-region (point) (progn (forward-line 1) (point)))))))))) | |
| 4358 | |
| 4359 (defun insert-directory-adj-pos (pos error-lines) | |
| 4360 "Convert `ls --dired' file name position value POS to a buffer position. | |
| 4361 File name position values returned in ls --dired output | |
| 4362 count only stdout; they don't count the error messages sent to stderr. | |
| 4363 So this function converts to them to real buffer positions. | |
| 4364 ERROR-LINES is a list of buffer positions of error message lines, | |
| 4365 of the form (START END)." | |
| 4366 (while (and error-lines (< (caar error-lines) pos)) | |
| 4367 (setq pos (+ pos (- (nth 1 (car error-lines)) (nth 0 (car error-lines))))) | |
| 4368 (pop error-lines)) | |
| 4369 pos) | |
| 428 | 4370 |
| 1333 | 4371 ;; BEGIN SYNC WITH FSF 21.2. |
| 4372 | |
| 4373 (defun insert-directory-safely (file switches | |
| 4374 &optional wildcard full-directory-p) | |
| 4375 "Insert directory listing for FILE, formatted according to SWITCHES. | |
| 4376 | |
| 4377 Like `insert-directory', but if FILE does not exist, it inserts a | |
| 4378 message to that effect instead of signaling an error." | |
| 4379 (if (file-exists-p file) | |
| 4380 (insert-directory file switches wildcard full-directory-p) | |
| 4381 ;; Simulate the message printed by `ls'. | |
| 4382 (insert (format "%s: No such file or directory\n" file)))) | |
| 4383 | |
| 428 | 4384 (defvar kill-emacs-query-functions nil |
| 4385 "Functions to call with no arguments to query about killing XEmacs. | |
| 4386 If any of these functions returns nil, killing Emacs is cancelled. | |
| 4387 `save-buffers-kill-emacs' (\\[save-buffers-kill-emacs]) calls these functions, | |
| 4388 but `kill-emacs', the low level primitive, does not. | |
| 4389 See also `kill-emacs-hook'.") | |
| 4390 | |
| 1333 | 4391 (defcustom confirm-kill-emacs nil |
| 4392 "How to ask for confirmation when leaving Emacs. | |
| 4393 If nil, the default, don't ask at all. If the value is non-nil, it should | |
| 4394 be a predicate function such as `yes-or-no-p'." | |
| 4395 :type '(choice (const :tag "Ask with yes-or-no-p" yes-or-no-p) | |
| 4396 (const :tag "Ask with y-or-n-p" y-or-n-p) | |
| 4397 (const :tag "Don't confirm" nil)) | |
| 4398 :group 'emacs | |
| 4399 ;:version "21.1" | |
| 4400 ) | |
| 4401 | |
| 428 | 4402 (defun save-buffers-kill-emacs (&optional arg) |
| 4403 "Offer to save each buffer, then kill this XEmacs process. | |
| 4404 With prefix arg, silently save all file-visiting buffers, then kill." | |
| 4405 (interactive "P") | |
| 4406 (save-some-buffers arg t) | |
| 4407 (and (or (not (memq t (mapcar #'(lambda (buf) (and (buffer-file-name buf) | |
| 4408 (buffer-modified-p buf))) | |
| 4409 (buffer-list)))) | |
| 4410 (yes-or-no-p "Modified buffers exist; exit anyway? ")) | |
| 4411 (or (not (fboundp 'process-list)) | |
| 4412 ;; process-list is not defined on VMS. | |
| 4413 (let ((processes (process-list)) | |
| 4414 active) | |
| 4415 (while processes | |
| 4416 (and (memq (process-status (car processes)) '(run stop open)) | |
| 4417 (let ((val (process-kill-without-query (car processes)))) | |
| 4418 (process-kill-without-query (car processes) val) | |
| 4419 val) | |
| 4420 (setq active t)) | |
| 4421 (setq processes (cdr processes))) | |
| 4422 (or | |
| 4423 (not active) | |
| 4424 (save-excursion | |
| 4425 (save-window-excursion | |
| 4426 (delete-other-windows) | |
| 4427 (list-processes) | |
| 4428 (yes-or-no-p | |
| 4429 "Active processes exist; kill them and exit anyway? ")))))) | |
| 4430 ;; Query the user for other things, perhaps. | |
| 4431 (run-hook-with-args-until-failure 'kill-emacs-query-functions) | |
| 1333 | 4432 (or (null confirm-kill-emacs) |
| 4433 (funcall confirm-kill-emacs "Really exit Emacs? ")) | |
| 428 | 4434 (kill-emacs))) |
| 4435 | |
| 4436 (defun symlink-expand-file-name (filename) | |
| 4437 "If FILENAME is a symlink, return its non-symlink equivalent. | |
| 4438 Unlike `file-truename', this doesn't chase symlinks in directory | |
| 4439 components of the file or expand a relative pathname into an | |
| 4440 absolute one." | |
| 4441 (let ((count 20)) | |
| 4442 (while (and (> count 0) (file-symlink-p filename)) | |
| 4443 (setq filename (file-symlink-p filename) | |
| 4444 count (1- count))) | |
| 4445 (if (> count 0) | |
| 4446 filename | |
| 4447 (error "Apparently circular symlink path")))) | |
| 4448 | |
| 4449 ;; Suggested by Michael Kifer <kifer@CS.SunySB.EDU> | |
| 4450 (defun file-remote-p (file-name) | |
| 4451 "Test whether FILE-NAME is looked for on a remote system." | |
| 776 | 4452 (cond ((not (declare-boundp allow-remote-paths)) nil) |
| 502 | 4453 ((fboundp 'ange-ftp-ftp-path) |
| 4454 (declare-fboundp (ange-ftp-ftp-path file-name))) | |
| 4455 ((fboundp 'efs-ftp-path) | |
| 4456 (declare-fboundp (efs-ftp-path file-name))) | |
| 428 | 4457 (t nil))) |
| 4458 | |
| 1333 | 4459 |
| 4460 ;; We use /: as a prefix to "quote" a file name | |
| 4461 ;; so that magic file name handlers will not apply to it. | |
| 4462 | |
| 4463 (setq file-name-handler-alist | |
| 4464 (cons '("\\`/:" . file-name-non-special) | |
| 4465 file-name-handler-alist)) | |
| 4466 | |
| 4467 ;; We depend on being the last handler on the list, | |
| 4468 ;; so that anything else which does need handling | |
| 4469 ;; has been handled already. | |
| 4470 ;; So it is safe for us to inhibit *all* magic file name handlers. | |
| 4471 | |
| 4472 (defun file-name-non-special (operation &rest arguments) | |
| 4473 (let ((file-name-handler-alist nil) | |
| 4474 (default-directory | |
| 4475 (if (eq operation 'insert-directory) | |
| 4476 (directory-file-name | |
| 4477 (expand-file-name | |
| 4478 (unhandled-file-name-directory default-directory))) | |
| 4479 default-directory)) | |
| 4480 ;; Get a list of the indices of the args which are file names. | |
| 4481 (file-arg-indices | |
| 4482 (cdr (or (assq operation | |
| 4483 ;; The first four are special because they | |
| 4484 ;; return a file name. We want to include the /: | |
| 4485 ;; in the return value. | |
| 4486 ;; So just avoid stripping it in the first place. | |
| 4487 '((expand-file-name . nil) | |
| 4488 ;; `identity' means just return the first arg | |
| 4489 ;; as stripped of its quoting. | |
| 4490 (substitute-in-file-name . identity) | |
| 4491 (file-name-directory . nil) | |
| 4492 (file-name-as-directory . nil) | |
| 4493 (directory-file-name . nil) | |
| 4494 (file-name-completion 0 1) | |
| 4495 (file-name-all-completions 0 1) | |
| 4496 (rename-file 0 1) | |
| 4497 (copy-file 0 1) | |
| 4498 (make-symbolic-link 0 1) | |
| 4499 (add-name-to-file 0 1))) | |
| 4500 ;; For all other operations, treat the first argument only | |
| 4501 ;; as the file name. | |
| 4502 '(nil 0)))) | |
| 4503 ;; Copy ARGUMENTS so we can replace elements in it. | |
| 4504 (arguments (copy-sequence arguments))) | |
| 4505 ;; Strip off the /: from the file names that have this handler. | |
| 4506 (save-match-data | |
| 4507 (while (consp file-arg-indices) | |
| 4508 (let ((pair (nthcdr (car file-arg-indices) arguments))) | |
| 4509 (and (car pair) | |
| 4510 (string-match "\\`/:" (car pair)) | |
| 4511 (setcar pair | |
| 4512 (if (= (length (car pair)) 2) | |
| 4513 "/" | |
| 4514 (substring (car pair) 2))))) | |
| 4515 (setq file-arg-indices (cdr file-arg-indices)))) | |
| 4516 (if (eq file-arg-indices 'identity) | |
| 4517 (car arguments) | |
| 4518 (apply operation arguments)))) | |
| 4519 | |
| 4520 ;; END SYNC WITH FSF 21.2. | |
| 428 | 4521 |
| 4522 ;;; files.el ends here |