| 1 | ;;; files.el --- file input and output commands for Emacs |
| 2 | |
| 3 | ;; Copyright (C) 1985, 86, 87, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002 |
| 4 | ;;; Free Software Foundation, Inc. |
| 5 | |
| 6 | ;; Maintainer: FSF |
| 7 | |
| 8 | ;; This file is part of GNU Emacs. |
| 9 | |
| 10 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by |
| 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
| 13 | ;; any later version. |
| 14 | |
| 15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ;; GNU General Public License for more details. |
| 19 | |
| 20 | ;; You should have received a copy of the GNU General Public License |
| 21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
| 22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | ;; Boston, MA 02111-1307, USA. |
| 24 | |
| 25 | ;;; Commentary: |
| 26 | |
| 27 | ;; Defines most of Emacs's file- and directory-handling functions, |
| 28 | ;; including basic file visiting, backup generation, link handling, |
| 29 | ;; ITS-id version control, load- and write-hook handling, and the like. |
| 30 | |
| 31 | ;;; Code: |
| 32 | |
| 33 | (defgroup backup nil |
| 34 | "Backups of edited data files." |
| 35 | :group 'files) |
| 36 | |
| 37 | (defgroup find-file nil |
| 38 | "Finding files." |
| 39 | :group 'files) |
| 40 | |
| 41 | |
| 42 | (defcustom delete-auto-save-files t |
| 43 | "*Non-nil means delete auto-save file when a buffer is saved or killed. |
| 44 | |
| 45 | Note that auto-save file will not be deleted if the buffer is killed |
| 46 | when it has unsaved changes." |
| 47 | :type 'boolean |
| 48 | :group 'auto-save) |
| 49 | |
| 50 | (defcustom directory-abbrev-alist |
| 51 | nil |
| 52 | "*Alist of abbreviations for file directories. |
| 53 | A list of elements of the form (FROM . TO), each meaning to replace |
| 54 | FROM with TO when it appears in a directory name. This replacement is |
| 55 | done when setting up the default directory of a newly visited file. |
| 56 | *Every* FROM string should start with `^'. |
| 57 | |
| 58 | Do not use `~' in the TO strings. |
| 59 | They should be ordinary absolute directory names. |
| 60 | |
| 61 | Use this feature when you have directories which you normally refer to |
| 62 | via absolute symbolic links. Make TO the name of the link, and FROM |
| 63 | the name it is linked to." |
| 64 | :type '(repeat (cons :format "%v" |
| 65 | :value ("" . "") |
| 66 | (regexp :tag "From") |
| 67 | (regexp :tag "To"))) |
| 68 | :group 'abbrev |
| 69 | :group 'find-file) |
| 70 | |
| 71 | ;; Turn off backup files on VMS since it has version numbers. |
| 72 | (defcustom make-backup-files (not (eq system-type 'vax-vms)) |
| 73 | "*Non-nil means make a backup of a file the first time it is saved. |
| 74 | This can be done by renaming the file or by copying. |
| 75 | |
| 76 | Renaming means that Emacs renames the existing file so that it is a |
| 77 | backup file, then writes the buffer into a new file. Any other names |
| 78 | that the old file had will now refer to the backup file. The new file |
| 79 | is owned by you and its group is defaulted. |
| 80 | |
| 81 | Copying means that Emacs copies the existing file into the backup |
| 82 | file, then writes the buffer on top of the existing file. Any other |
| 83 | names that the old file had will now refer to the new (edited) file. |
| 84 | The file's owner and group are unchanged. |
| 85 | |
| 86 | The choice of renaming or copying is controlled by the variables |
| 87 | `backup-by-copying', `backup-by-copying-when-linked', |
| 88 | `backup-by-copying-when-mismatch' and |
| 89 | `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'." |
| 90 | :type 'boolean |
| 91 | :group 'backup) |
| 92 | |
| 93 | ;; Do this so that local variables based on the file name |
| 94 | ;; are not overridden by the major mode. |
| 95 | (defvar backup-inhibited nil |
| 96 | "Non-nil means don't make a backup, regardless of the other parameters. |
| 97 | This variable is intended for use by making it local to a buffer. |
| 98 | But it is local only if you make it local.") |
| 99 | (put 'backup-inhibited 'permanent-local t) |
| 100 | |
| 101 | (defcustom backup-by-copying nil |
| 102 | "*Non-nil means always use copying to create backup files. |
| 103 | See documentation of variable `make-backup-files'." |
| 104 | :type 'boolean |
| 105 | :group 'backup) |
| 106 | |
| 107 | (defcustom backup-by-copying-when-linked nil |
| 108 | "*Non-nil means use copying to create backups for files with multiple names. |
| 109 | This causes the alternate names to refer to the latest version as edited. |
| 110 | This variable is relevant only if `backup-by-copying' is nil." |
| 111 | :type 'boolean |
| 112 | :group 'backup) |
| 113 | |
| 114 | (defcustom backup-by-copying-when-mismatch nil |
| 115 | "*Non-nil means create backups by copying if this preserves owner or group. |
| 116 | Renaming may still be used (subject to control of other variables) |
| 117 | when it would not result in changing the owner or group of the file; |
| 118 | that is, for files which are owned by you and whose group matches |
| 119 | the default for a new file created there by you. |
| 120 | This variable is relevant only if `backup-by-copying' is nil." |
| 121 | :type 'boolean |
| 122 | :group 'backup) |
| 123 | |
| 124 | (defcustom backup-by-copying-when-privileged-mismatch 200 |
| 125 | "*Non-nil means create backups by copying to preserve a privileged owner. |
| 126 | Renaming may still be used (subject to control of other variables) |
| 127 | when it would not result in changing the owner of the file or if the owner |
| 128 | has a user id greater than the value of this variable. This is useful |
| 129 | when low-numbered uid's are used for special system users (such as root) |
| 130 | that must maintain ownership of certain files. |
| 131 | This variable is relevant only if `backup-by-copying' and |
| 132 | `backup-by-copying-when-mismatch' are nil." |
| 133 | :type '(choice (const nil) integer) |
| 134 | :group 'backup) |
| 135 | |
| 136 | (defvar backup-enable-predicate 'normal-backup-enable-predicate |
| 137 | "Predicate that looks at a file name and decides whether to make backups. |
| 138 | Called with an absolute file name as argument, it returns t to enable backup.") |
| 139 | |
| 140 | (defcustom buffer-offer-save nil |
| 141 | "*Non-nil in a buffer means always offer to save buffer on exit. |
| 142 | Do so even if the buffer is not visiting a file. |
| 143 | Automatically local in all buffers." |
| 144 | :type 'boolean |
| 145 | :group 'backup) |
| 146 | (make-variable-buffer-local 'buffer-offer-save) |
| 147 | |
| 148 | (defcustom find-file-existing-other-name t |
| 149 | "*Non-nil means find a file under alternative names, in existing buffers. |
| 150 | This means if any existing buffer is visiting the file you want |
| 151 | under another name, you get the existing buffer instead of a new buffer." |
| 152 | :type 'boolean |
| 153 | :group 'find-file) |
| 154 | |
| 155 | (defcustom find-file-visit-truename nil |
| 156 | "*Non-nil means visit a file under its truename. |
| 157 | The truename of a file is found by chasing all links |
| 158 | both at the file level and at the levels of the containing directories." |
| 159 | :type 'boolean |
| 160 | :group 'find-file) |
| 161 | |
| 162 | (defcustom revert-without-query |
| 163 | nil |
| 164 | "*Specify which files should be reverted without query. |
| 165 | The value is a list of regular expressions. |
| 166 | If the file name matches one of these regular expressions, |
| 167 | then `revert-buffer' reverts the file without querying |
| 168 | if the file has changed on disk and you have not edited the buffer." |
| 169 | :type '(repeat regexp) |
| 170 | :group 'find-file) |
| 171 | |
| 172 | (defvar buffer-file-number nil |
| 173 | "The device number and file number of the file visited in the current buffer. |
| 174 | The value is a list of the form (FILENUM DEVNUM). |
| 175 | This pair of numbers uniquely identifies the file. |
| 176 | If the buffer is visiting a new file, the value is nil.") |
| 177 | (make-variable-buffer-local 'buffer-file-number) |
| 178 | (put 'buffer-file-number 'permanent-local t) |
| 179 | |
| 180 | (defvar buffer-file-numbers-unique (not (memq system-type '(windows-nt))) |
| 181 | "Non-nil means that buffer-file-number uniquely identifies files.") |
| 182 | |
| 183 | (defvar buffer-file-read-only nil |
| 184 | "Non-nil if visited file was read-only when visited.") |
| 185 | (make-variable-buffer-local 'buffer-file-read-only) |
| 186 | |
| 187 | (defcustom temporary-file-directory |
| 188 | (file-name-as-directory |
| 189 | (cond ((memq system-type '(ms-dos windows-nt)) |
| 190 | (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp")) |
| 191 | ((memq system-type '(vax-vms axp-vms)) |
| 192 | (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:")) |
| 193 | (t |
| 194 | (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp")))) |
| 195 | "The directory for writing temporary files." |
| 196 | :group 'files |
| 197 | :type 'directory) |
| 198 | |
| 199 | (defcustom small-temporary-file-directory |
| 200 | (if (eq system-type 'ms-dos) (getenv "TMPDIR")) |
| 201 | "The directory for writing small temporary files. |
| 202 | If non-nil, this directory is used instead of `temporary-file-directory' |
| 203 | by programs that create small temporary files. This is for systems that |
| 204 | have fast storage with limited space, such as a RAM disk." |
| 205 | :group 'files |
| 206 | :type '(choice (const nil) directory)) |
| 207 | |
| 208 | ;; The system null device. (Should reference NULL_DEVICE from C.) |
| 209 | (defvar null-device "/dev/null" "The system null device.") |
| 210 | |
| 211 | (defvar file-name-invalid-regexp |
| 212 | (cond ((and (eq system-type 'ms-dos) (not (msdos-long-file-names))) |
| 213 | (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive |
| 214 | "[+, ;=|<>\"?*]\\|\\[\\|\\]\\|" ; invalid characters |
| 215 | "[\000-\031]\\|" ; control characters |
| 216 | "\\(/\\.\\.?[^/]\\)\\|" ; leading dots |
| 217 | "\\(/[^/.]+\\.[^/.]*\\.\\)")) ; more than a single dot |
| 218 | ((memq system-type '(ms-dos windows-nt)) |
| 219 | (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive |
| 220 | "[|<>\"?*\000-\031]")) ; invalid characters |
| 221 | (t "[\000]")) |
| 222 | "Regexp recognizing file names which aren't allowed by the filesystem.") |
| 223 | |
| 224 | (defcustom file-precious-flag nil |
| 225 | "*Non-nil means protect against I/O errors while saving files. |
| 226 | Some modes set this non-nil in particular buffers. |
| 227 | |
| 228 | This feature works by writing the new contents into a temporary file |
| 229 | and then renaming the temporary file to replace the original. |
| 230 | In this way, any I/O error in writing leaves the original untouched, |
| 231 | and there is never any instant where the file is nonexistent. |
| 232 | |
| 233 | Note that this feature forces backups to be made by copying. |
| 234 | Yet, at the same time, saving a precious file |
| 235 | breaks any hard links between it and other files." |
| 236 | :type 'boolean |
| 237 | :group 'backup) |
| 238 | |
| 239 | (defcustom version-control nil |
| 240 | "*Control use of version numbers for backup files. |
| 241 | t means make numeric backup versions unconditionally. |
| 242 | nil means make them for files that have some already. |
| 243 | `never' means do not make them." |
| 244 | :type '(choice (const :tag "Never" never) |
| 245 | (const :tag "If existing" nil) |
| 246 | (other :tag "Always" t)) |
| 247 | :group 'backup |
| 248 | :group 'vc) |
| 249 | |
| 250 | (defcustom dired-kept-versions 2 |
| 251 | "*When cleaning directory, number of versions to keep." |
| 252 | :type 'integer |
| 253 | :group 'backup |
| 254 | :group 'dired) |
| 255 | |
| 256 | (defcustom delete-old-versions nil |
| 257 | "*If t, delete excess backup versions silently. |
| 258 | If nil, ask confirmation. Any other value prevents any trimming." |
| 259 | :type '(choice (const :tag "Delete" t) |
| 260 | (const :tag "Ask" nil) |
| 261 | (other :tag "Leave" other)) |
| 262 | :group 'backup) |
| 263 | |
| 264 | (defcustom kept-old-versions 2 |
| 265 | "*Number of oldest versions to keep when a new numbered backup is made." |
| 266 | :type 'integer |
| 267 | :group 'backup) |
| 268 | |
| 269 | (defcustom kept-new-versions 2 |
| 270 | "*Number of newest versions to keep when a new numbered backup is made. |
| 271 | Includes the new backup. Must be > 0" |
| 272 | :type 'integer |
| 273 | :group 'backup) |
| 274 | |
| 275 | (defcustom require-final-newline nil |
| 276 | "*Value of t says silently ensure a file ends in a newline when it is saved. |
| 277 | Non-nil but not t says ask user whether to add a newline when there isn't one. |
| 278 | nil means don't add newlines." |
| 279 | :type '(choice (const :tag "Off" nil) |
| 280 | (const :tag "Add" t) |
| 281 | (other :tag "Ask" ask)) |
| 282 | :group 'editing-basics) |
| 283 | |
| 284 | (defcustom auto-save-default t |
| 285 | "*Non-nil says by default do auto-saving of every file-visiting buffer." |
| 286 | :type 'boolean |
| 287 | :group 'auto-save) |
| 288 | |
| 289 | (defcustom auto-save-visited-file-name nil |
| 290 | "*Non-nil says auto-save a buffer in the file it is visiting, when practical. |
| 291 | Normally auto-save files are written under other names." |
| 292 | :type 'boolean |
| 293 | :group 'auto-save) |
| 294 | |
| 295 | (defcustom auto-save-file-name-transforms |
| 296 | `(("\\`/[^/]*:\\(.+/\\)*\\(.*\\)" |
| 297 | ;; Don't put "\\2" inside expand-file-name, since it will be |
| 298 | ;; transformed to "/2" on DOS/Windows. |
| 299 | ,(concat temporary-file-directory "\\2") t)) |
| 300 | "*Transforms to apply to buffer file name before making auto-save file name. |
| 301 | Each transform is a list (REGEXP REPLACEMENT UNIQUIFY): |
| 302 | REGEXP is a regular expression to match against the file name. |
| 303 | If it matches, `replace-match' is used to replace the |
| 304 | matching part with REPLACEMENT. |
| 305 | If the optional element UNIQUIFY is non-nil, the auto-save file name is |
| 306 | constructed by taking the directory part of the replaced file-name, |
| 307 | concatenated with the buffer file name with all directory separators |
| 308 | changed to `!' to prevent clashes. This will not work |
| 309 | correctly if your filesystem truncates the resulting name. |
| 310 | |
| 311 | All the transforms in the list are tried, in the order they are listed. |
| 312 | When one transform applies, its result is final; |
| 313 | no further transforms are tried. |
| 314 | |
| 315 | The default value is set up to put the auto-save file into the |
| 316 | temporary directory (see the variable `temporary-file-directory') for |
| 317 | editing a remote file. |
| 318 | |
| 319 | On MS-DOS filesystems without long names this variable is always |
| 320 | ignored." |
| 321 | :group 'auto-save |
| 322 | :type '(repeat (list (string :tag "Regexp") (string :tag "Replacement") |
| 323 | (boolean :tag "Uniquify"))) |
| 324 | :version "21.1") |
| 325 | |
| 326 | (defcustom save-abbrevs t |
| 327 | "*Non-nil means save word abbrevs too when files are saved. |
| 328 | If `silently', don't ask the user before saving." |
| 329 | :type '(choice (const t) (const nil) (const silently)) |
| 330 | :group 'abbrev) |
| 331 | |
| 332 | (defcustom find-file-run-dired t |
| 333 | "*Non-nil means allow `find-file' to visit directories. |
| 334 | To visit the directory, `find-file' runs `find-directory-functions'." |
| 335 | :type 'boolean |
| 336 | :group 'find-file) |
| 337 | |
| 338 | (defcustom find-directory-functions '(cvs-dired-noselect dired-noselect) |
| 339 | "*List of functions to try in sequence to visit a directory. |
| 340 | Each function is called with the directory name as the sole argument |
| 341 | and should return either a buffer or nil." |
| 342 | :type '(hook :options (cvs-dired-noselect dired-noselect)) |
| 343 | :group 'find-file) |
| 344 | |
| 345 | ;;;It is not useful to make this a local variable. |
| 346 | ;;;(put 'find-file-not-found-hooks 'permanent-local t) |
| 347 | (defvar find-file-not-found-hooks nil |
| 348 | "List of functions to be called for `find-file' on nonexistent file. |
| 349 | These functions are called as soon as the error is detected. |
| 350 | Variable `buffer-file-name' is already set up. |
| 351 | The functions are called in the order given until one of them returns non-nil.") |
| 352 | |
| 353 | ;;;It is not useful to make this a local variable. |
| 354 | ;;;(put 'find-file-hooks 'permanent-local t) |
| 355 | (defvar find-file-hooks nil |
| 356 | "List of functions to be called after a buffer is loaded from a file. |
| 357 | The buffer's local variables (if any) will have been processed before the |
| 358 | functions are called.") |
| 359 | |
| 360 | (defvar write-file-hooks nil |
| 361 | "List of functions to be called before writing out a buffer to a file. |
| 362 | If one of them returns non-nil, the file is considered already written |
| 363 | and the rest are not called. |
| 364 | These hooks are considered to pertain to the visited file. |
| 365 | So any buffer-local binding of `write-file-hooks' is |
| 366 | discarded if you change the visited file name with \\[set-visited-file-name]. |
| 367 | |
| 368 | Don't make this variable buffer-local; instead, use `local-write-file-hooks'. |
| 369 | See also `write-contents-hooks'.") |
| 370 | ;;; However, in case someone does make it local... |
| 371 | (put 'write-file-hooks 'permanent-local t) |
| 372 | |
| 373 | (defvar local-write-file-hooks nil |
| 374 | "Just like `write-file-hooks', except intended for per-buffer use. |
| 375 | The functions in this list are called before the ones in |
| 376 | `write-file-hooks'. |
| 377 | |
| 378 | This variable is meant to be used for hooks that have to do with a |
| 379 | particular visited file. Therefore, it is a permanent local, so that |
| 380 | changing the major mode does not clear it. However, calling |
| 381 | `set-visited-file-name' does clear it.") |
| 382 | (make-variable-buffer-local 'local-write-file-hooks) |
| 383 | (put 'local-write-file-hooks 'permanent-local t) |
| 384 | |
| 385 | (defvar write-contents-hooks nil |
| 386 | "List of functions to be called before writing out a buffer to a file. |
| 387 | If one of them returns non-nil, the file is considered already written |
| 388 | and the rest are not called. |
| 389 | |
| 390 | This variable is meant to be used for hooks that pertain to the |
| 391 | buffer's contents, not to the particular visited file; thus, |
| 392 | `set-visited-file-name' does not clear this variable; but changing the |
| 393 | major mode does clear it. |
| 394 | |
| 395 | This variable automatically becomes buffer-local whenever it is set. |
| 396 | If you use `add-hook' to add elements to the list, use nil for the |
| 397 | LOCAL argument. |
| 398 | |
| 399 | See also `write-file-hooks'.") |
| 400 | (make-variable-buffer-local 'write-contents-hooks) |
| 401 | |
| 402 | (defcustom enable-local-variables t |
| 403 | "*Control use of local variables in files you visit. |
| 404 | The value can be t, nil or something else. |
| 405 | A value of t means file local variables specifications are obeyed; |
| 406 | nil means they are ignored; anything else means query. |
| 407 | This variable also controls use of major modes specified in |
| 408 | a -*- line. |
| 409 | |
| 410 | The command \\[normal-mode], when used interactively, |
| 411 | always obeys file local variable specifications and the -*- line, |
| 412 | and ignores this variable." |
| 413 | :type '(choice (const :tag "Obey" t) |
| 414 | (const :tag "Ignore" nil) |
| 415 | (other :tag "Query" other)) |
| 416 | :group 'find-file) |
| 417 | |
| 418 | (defvar local-enable-local-variables t |
| 419 | "Like `enable-local-variables' but meant for buffer-local bindings. |
| 420 | The meaningful values are nil and non-nil. The default is non-nil. |
| 421 | If a major mode sets this to nil, buffer-locally, then any local |
| 422 | variables list in the file will be ignored. |
| 423 | |
| 424 | This variable does not affect the use of major modes |
| 425 | specified in a -*- line.") |
| 426 | |
| 427 | (defcustom enable-local-eval 'maybe |
| 428 | "*Control processing of the \"variable\" `eval' in a file's local variables. |
| 429 | The value can be t, nil or something else. |
| 430 | A value of t means obey `eval' variables; |
| 431 | nil means ignore them; anything else means query. |
| 432 | |
| 433 | The command \\[normal-mode] always obeys local-variables lists |
| 434 | and ignores this variable." |
| 435 | :type '(choice (const :tag "Obey" t) |
| 436 | (const :tag "Ignore" nil) |
| 437 | (other :tag "Query" other)) |
| 438 | :group 'find-file) |
| 439 | |
| 440 | ;; Avoid losing in versions where CLASH_DETECTION is disabled. |
| 441 | (or (fboundp 'lock-buffer) |
| 442 | (defalias 'lock-buffer 'ignore)) |
| 443 | (or (fboundp 'unlock-buffer) |
| 444 | (defalias 'unlock-buffer 'ignore)) |
| 445 | (or (fboundp 'file-locked-p) |
| 446 | (defalias 'file-locked-p 'ignore)) |
| 447 | |
| 448 | (defvar view-read-only nil |
| 449 | "*Non-nil means buffers visiting files read-only, do it in view mode.") |
| 450 | |
| 451 | (defun ange-ftp-completion-hook-function (op &rest args) |
| 452 | "Provides support for ange-ftp host name completion. |
| 453 | Runs the usual ange-ftp hook, but only for completion operations." |
| 454 | ;; Having this here avoids the need to load ange-ftp when it's not |
| 455 | ;; really in use. |
| 456 | (if (memq op '(file-name-completion file-name-all-completions)) |
| 457 | (apply 'ange-ftp-hook-function op args) |
| 458 | (let ((inhibit-file-name-handlers |
| 459 | (cons 'ange-ftp-completion-hook-function |
| 460 | (and (eq inhibit-file-name-operation op) |
| 461 | inhibit-file-name-handlers))) |
| 462 | (inhibit-file-name-operation op)) |
| 463 | (apply op args)))) |
| 464 | |
| 465 | (defun convert-standard-filename (filename) |
| 466 | "Convert a standard file's name to something suitable for the current OS. |
| 467 | This function's standard definition is trivial; it just returns the argument. |
| 468 | However, on some systems, the function is redefined with a definition |
| 469 | that really does change some file names to canonicalize certain |
| 470 | patterns and to guarantee valid names." |
| 471 | filename) |
| 472 | |
| 473 | (defun read-directory-name (prompt &optional dir default-dirname mustmatch initial) |
| 474 | "Read directory name, prompting with PROMPT and completing in directory DIR. |
| 475 | Value is not expanded---you must call `expand-file-name' yourself. |
| 476 | Default name to DEFAULT-DIRNAME if user enters a null string. |
| 477 | (If DEFAULT-DIRNAME is omitted, the current buffer's directory is used, |
| 478 | except that if INITIAL is specified, that combined with DIR is used.) |
| 479 | Fourth arg MUSTMATCH non-nil means require existing directory's name. |
| 480 | Non-nil and non-t means also require confirmation after completion. |
| 481 | Fifth arg INITIAL specifies text to start with. |
| 482 | DIR defaults to current buffer's directory default." |
| 483 | (unless dir |
| 484 | (setq dir default-directory)) |
| 485 | (unless default-dirname |
| 486 | (setq default-dirname |
| 487 | (if initial (concat dir initial) default-directory))) |
| 488 | (read-file-name prompt dir default-dirname mustmatch initial |
| 489 | 'file-directory-p)) |
| 490 | |
| 491 | \f |
| 492 | (defun pwd () |
| 493 | "Show the current default directory." |
| 494 | (interactive nil) |
| 495 | (message "Directory %s" default-directory)) |
| 496 | |
| 497 | (defvar cd-path nil |
| 498 | "Value of the CDPATH environment variable, as a list. |
| 499 | Not actually set up until the first time you use it.") |
| 500 | |
| 501 | (defun parse-colon-path (cd-path) |
| 502 | "Explode a colon-separated search path into a list of directory names. |
| 503 | \(For values of `colon' equal to `path-separator'.)" |
| 504 | ;; We could use split-string here. |
| 505 | (and cd-path |
| 506 | (let (cd-prefix cd-list (cd-start 0) cd-colon) |
| 507 | (setq cd-path (concat cd-path path-separator)) |
| 508 | (while (setq cd-colon (string-match path-separator cd-path cd-start)) |
| 509 | (setq cd-list |
| 510 | (nconc cd-list |
| 511 | (list (if (= cd-start cd-colon) |
| 512 | nil |
| 513 | (substitute-in-file-name |
| 514 | (file-name-as-directory |
| 515 | (substring cd-path cd-start cd-colon))))))) |
| 516 | (setq cd-start (+ cd-colon 1))) |
| 517 | cd-list))) |
| 518 | |
| 519 | (defun cd-absolute (dir) |
| 520 | "Change current directory to given absolute file name DIR." |
| 521 | ;; Put the name into directory syntax now, |
| 522 | ;; because otherwise expand-file-name may give some bad results. |
| 523 | (if (not (eq system-type 'vax-vms)) |
| 524 | (setq dir (file-name-as-directory dir))) |
| 525 | (setq dir (abbreviate-file-name (expand-file-name dir))) |
| 526 | (if (not (file-directory-p dir)) |
| 527 | (if (file-exists-p dir) |
| 528 | (error "%s is not a directory" dir) |
| 529 | (error "%s: no such directory" dir)) |
| 530 | (if (file-executable-p dir) |
| 531 | (setq default-directory dir) |
| 532 | (error "Cannot cd to %s: Permission denied" dir)))) |
| 533 | |
| 534 | (defun cd (dir) |
| 535 | "Make DIR become the current buffer's default directory. |
| 536 | If your environment includes a `CDPATH' variable, try each one of that |
| 537 | colon-separated list of directories when resolving a relative directory name." |
| 538 | (interactive |
| 539 | (list (read-directory-name "Change default directory: " |
| 540 | default-directory default-directory |
| 541 | (and (member cd-path '(nil ("./"))) |
| 542 | (null (getenv "CDPATH")))))) |
| 543 | (if (file-name-absolute-p dir) |
| 544 | (cd-absolute (expand-file-name dir)) |
| 545 | (if (null cd-path) |
| 546 | (let ((trypath (parse-colon-path (getenv "CDPATH")))) |
| 547 | (setq cd-path (or trypath (list "./"))))) |
| 548 | (if (not (catch 'found |
| 549 | (mapcar |
| 550 | (function (lambda (x) |
| 551 | (let ((f (expand-file-name (concat x dir)))) |
| 552 | (if (file-directory-p f) |
| 553 | (progn |
| 554 | (cd-absolute f) |
| 555 | (throw 'found t)))))) |
| 556 | cd-path) |
| 557 | nil)) |
| 558 | (error "No such directory found via CDPATH environment variable")))) |
| 559 | |
| 560 | (defun load-file (file) |
| 561 | "Load the Lisp file named FILE." |
| 562 | ;; This is a case where .elc makes a lot of sense. |
| 563 | (interactive (list (let ((completion-ignored-extensions |
| 564 | (remove ".elc" completion-ignored-extensions))) |
| 565 | (read-file-name "Load file: ")))) |
| 566 | (load (expand-file-name file) nil nil t)) |
| 567 | |
| 568 | (defun locate-file (filename path &optional suffixes predicate) |
| 569 | "Search for FILENAME through PATH. |
| 570 | If SUFFIXES is non-nil, it should be a list of suffixes to append to |
| 571 | file name when searching. If SUFFIXES is nil, it is equivalent to '(\"\"). |
| 572 | If non-nil, PREDICATE is used instead of `file-readable-p'. |
| 573 | PREDICATE can also be an integer to pass to the `access' system call, |
| 574 | in which case file-name handlers are ignored. This usage is deprecated. |
| 575 | |
| 576 | For compatibility, PREDICATE can also be one of the symbols |
| 577 | `executable', `readable', `writable', or `exists', or a list of |
| 578 | one or more of those symbols." |
| 579 | (if (and predicate (symbolp predicate) (not (functionp predicate))) |
| 580 | (setq predicate (list predicate))) |
| 581 | (when (and (consp predicate) (not (functionp predicate))) |
| 582 | (setq predicate |
| 583 | (logior (if (memq 'executable predicate) 1 0) |
| 584 | (if (memq 'writable predicate) 2 0) |
| 585 | (if (memq 'readable predicate) 4 0)))) |
| 586 | (locate-file-internal filename path suffixes predicate)) |
| 587 | |
| 588 | (defun locate-file-completion (string path-and-suffixes action) |
| 589 | "Do completion for file names passed to `locate-file'. |
| 590 | PATH-AND-SUFFIXES is a pair of lists (DIRECTORIES . SUFFIXES)." |
| 591 | (if (file-name-absolute-p string) |
| 592 | (read-file-name-internal string nil action) |
| 593 | (let ((names nil) |
| 594 | (suffix (concat (regexp-opt (cdr path-and-suffixes) t) "\\'")) |
| 595 | (string-dir (file-name-directory string))) |
| 596 | (dolist (dir (car path-and-suffixes)) |
| 597 | (if string-dir (setq dir (expand-file-name string-dir dir))) |
| 598 | (when (file-directory-p dir) |
| 599 | (dolist (file (file-name-all-completions |
| 600 | (file-name-nondirectory string) dir)) |
| 601 | (push (if string-dir (concat string-dir file) file) names) |
| 602 | (when (string-match suffix file) |
| 603 | (setq file (substring file 0 (match-beginning 0))) |
| 604 | (push (if string-dir (concat string-dir file) file) names))))) |
| 605 | (if action |
| 606 | (all-completions string (mapcar 'list names)) |
| 607 | (try-completion string (mapcar 'list names)))))) |
| 608 | |
| 609 | (defun load-library (library) |
| 610 | "Load the library named LIBRARY. |
| 611 | This is an interface to the function `load'." |
| 612 | (interactive |
| 613 | (list (completing-read "Load library: " |
| 614 | 'locate-file-completion |
| 615 | (cons load-path load-suffixes)))) |
| 616 | (load library)) |
| 617 | |
| 618 | (defun file-local-copy (file) |
| 619 | "Copy the file FILE into a temporary file on this machine. |
| 620 | Returns the name of the local copy, or nil, if FILE is directly |
| 621 | accessible." |
| 622 | ;; This formerly had an optional BUFFER argument that wasn't used by |
| 623 | ;; anything. |
| 624 | (let ((handler (find-file-name-handler file 'file-local-copy))) |
| 625 | (if handler |
| 626 | (funcall handler 'file-local-copy file) |
| 627 | nil))) |
| 628 | |
| 629 | (defun file-truename (filename &optional counter prev-dirs) |
| 630 | "Return the truename of FILENAME, which should be absolute. |
| 631 | The truename of a file name is found by chasing symbolic links |
| 632 | both at the level of the file and at the level of the directories |
| 633 | containing it, until no links are left at any level. |
| 634 | |
| 635 | The arguments COUNTER and PREV-DIRS are used only in recursive calls. |
| 636 | Do not specify them in other calls." |
| 637 | ;; COUNTER can be a cons cell whose car is the count of how many more links |
| 638 | ;; to chase before getting an error. |
| 639 | ;; PREV-DIRS can be a cons cell whose car is an alist |
| 640 | ;; of truenames we've just recently computed. |
| 641 | |
| 642 | ;; The last test looks dubious, maybe `+' is meant here? --simon. |
| 643 | (if (or (string= filename "") (string= filename "~") |
| 644 | (and (string= (substring filename 0 1) "~") |
| 645 | (string-match "~[^/]*" filename))) |
| 646 | (progn |
| 647 | (setq filename (expand-file-name filename)) |
| 648 | (if (string= filename "") |
| 649 | (setq filename "/")))) |
| 650 | (or counter (setq counter (list 100))) |
| 651 | (let (done |
| 652 | ;; For speed, remove the ange-ftp completion handler from the list. |
| 653 | ;; We know it's not needed here. |
| 654 | ;; For even more speed, do this only on the outermost call. |
| 655 | (file-name-handler-alist |
| 656 | (if prev-dirs file-name-handler-alist |
| 657 | (let ((tem (copy-sequence file-name-handler-alist))) |
| 658 | (delq (rassq 'ange-ftp-completion-hook-function tem) tem))))) |
| 659 | (or prev-dirs (setq prev-dirs (list nil))) |
| 660 | |
| 661 | ;; andrewi@harlequin.co.uk - none of the following code (except for |
| 662 | ;; invoking the file-name handler) currently applies on Windows |
| 663 | ;; (ie. there are no native symlinks), but there is an issue with |
| 664 | ;; case differences being ignored by the OS, and short "8.3 DOS" |
| 665 | ;; name aliases existing for all files. (The short names are not |
| 666 | ;; reported by directory-files, but can be used to refer to files.) |
| 667 | ;; It seems appropriate for file-truename to resolve these issues in |
| 668 | ;; the most natural way, which on Windows is to call the function |
| 669 | ;; `w32-long-file-name' - this returns the exact name of a file as |
| 670 | ;; it is stored on disk (expanding short name aliases with the full |
| 671 | ;; name in the process). |
| 672 | (if (eq system-type 'windows-nt) |
| 673 | (let ((handler (find-file-name-handler filename 'file-truename)) |
| 674 | newname) |
| 675 | ;; For file name that has a special handler, call handler. |
| 676 | ;; This is so that ange-ftp can save time by doing a no-op. |
| 677 | (if handler |
| 678 | (setq filename (funcall handler 'file-truename filename)) |
| 679 | ;; If filename contains a wildcard, newname will be the old name. |
| 680 | (if (string-match "[[*?]" filename) |
| 681 | (setq newname filename) |
| 682 | ;; If filename doesn't exist, newname will be nil. |
| 683 | (setq newname (w32-long-file-name filename))) |
| 684 | (setq filename (or newname filename))) |
| 685 | (setq done t))) |
| 686 | |
| 687 | ;; If this file directly leads to a link, process that iteratively |
| 688 | ;; so that we don't use lots of stack. |
| 689 | (while (not done) |
| 690 | (setcar counter (1- (car counter))) |
| 691 | (if (< (car counter) 0) |
| 692 | (error "Apparent cycle of symbolic links for %s" filename)) |
| 693 | (let ((handler (find-file-name-handler filename 'file-truename))) |
| 694 | ;; For file name that has a special handler, call handler. |
| 695 | ;; This is so that ange-ftp can save time by doing a no-op. |
| 696 | (if handler |
| 697 | (setq filename (funcall handler 'file-truename filename) |
| 698 | done t) |
| 699 | (let ((dir (or (file-name-directory filename) default-directory)) |
| 700 | target dirfile) |
| 701 | ;; Get the truename of the directory. |
| 702 | (setq dirfile (directory-file-name dir)) |
| 703 | ;; If these are equal, we have the (or a) root directory. |
| 704 | (or (string= dir dirfile) |
| 705 | ;; If this is the same dir we last got the truename for, |
| 706 | ;; save time--don't recalculate. |
| 707 | (if (assoc dir (car prev-dirs)) |
| 708 | (setq dir (cdr (assoc dir (car prev-dirs)))) |
| 709 | (let ((old dir) |
| 710 | (new (file-name-as-directory (file-truename dirfile counter prev-dirs)))) |
| 711 | (setcar prev-dirs (cons (cons old new) (car prev-dirs))) |
| 712 | (setq dir new)))) |
| 713 | (if (equal ".." (file-name-nondirectory filename)) |
| 714 | (setq filename |
| 715 | (directory-file-name (file-name-directory (directory-file-name dir))) |
| 716 | done t) |
| 717 | (if (equal "." (file-name-nondirectory filename)) |
| 718 | (setq filename (directory-file-name dir) |
| 719 | done t) |
| 720 | ;; Put it back on the file name. |
| 721 | (setq filename (concat dir (file-name-nondirectory filename))) |
| 722 | ;; Is the file name the name of a link? |
| 723 | (setq target (file-symlink-p filename)) |
| 724 | (if target |
| 725 | ;; Yes => chase that link, then start all over |
| 726 | ;; since the link may point to a directory name that uses links. |
| 727 | ;; We can't safely use expand-file-name here |
| 728 | ;; since target might look like foo/../bar where foo |
| 729 | ;; is itself a link. Instead, we handle . and .. above. |
| 730 | (setq filename |
| 731 | (if (file-name-absolute-p target) |
| 732 | target |
| 733 | (concat dir target)) |
| 734 | done nil) |
| 735 | ;; No, we are done! |
| 736 | (setq done t)))))))) |
| 737 | filename)) |
| 738 | |
| 739 | (defun file-chase-links (filename) |
| 740 | "Chase links in FILENAME until a name that is not a link. |
| 741 | Does not examine containing directories for links, |
| 742 | unlike `file-truename'." |
| 743 | (let (tem (count 100) (newname filename)) |
| 744 | (while (setq tem (file-symlink-p newname)) |
| 745 | (save-match-data |
| 746 | (if (= count 0) |
| 747 | (error "Apparent cycle of symbolic links for %s" filename)) |
| 748 | ;; In the context of a link, `//' doesn't mean what Emacs thinks. |
| 749 | (while (string-match "//+" tem) |
| 750 | (setq tem (replace-match "/" nil nil tem))) |
| 751 | ;; Handle `..' by hand, since it needs to work in the |
| 752 | ;; target of any directory symlink. |
| 753 | ;; This code is not quite complete; it does not handle |
| 754 | ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose. |
| 755 | (while (string-match "\\`\\.\\./" tem) |
| 756 | (setq tem (substring tem 3)) |
| 757 | (setq newname (expand-file-name newname)) |
| 758 | ;; Chase links in the default dir of the symlink. |
| 759 | (setq newname |
| 760 | (file-chase-links |
| 761 | (directory-file-name (file-name-directory newname)))) |
| 762 | ;; Now find the parent of that dir. |
| 763 | (setq newname (file-name-directory newname))) |
| 764 | (setq newname (expand-file-name tem (file-name-directory newname))) |
| 765 | (setq count (1- count)))) |
| 766 | newname)) |
| 767 | \f |
| 768 | (defun switch-to-buffer-other-window (buffer &optional norecord) |
| 769 | "Select buffer BUFFER in another window. |
| 770 | Optional second arg NORECORD non-nil means |
| 771 | do not put this buffer at the front of the list of recently selected ones. |
| 772 | |
| 773 | This uses the function `display-buffer' as a subroutine; see its |
| 774 | documentation for additional customization information." |
| 775 | (interactive "BSwitch to buffer in other window: ") |
| 776 | (let ((pop-up-windows t)) |
| 777 | (pop-to-buffer buffer t norecord))) |
| 778 | |
| 779 | (defun switch-to-buffer-other-frame (buffer &optional norecord) |
| 780 | "Switch to buffer BUFFER in another frame. |
| 781 | Optional second arg NORECORD non-nil means |
| 782 | do not put this buffer at the front of the list of recently selected ones. |
| 783 | |
| 784 | This uses the function `display-buffer' as a subroutine; see its |
| 785 | documentation for additional customization information." |
| 786 | (interactive "BSwitch to buffer in other frame: ") |
| 787 | (let ((pop-up-frames t)) |
| 788 | (pop-to-buffer buffer t norecord) |
| 789 | (raise-frame (window-frame (selected-window))))) |
| 790 | |
| 791 | (defun find-file-read-args (prompt) |
| 792 | (list (let ((find-file-default |
| 793 | (and buffer-file-name |
| 794 | (abbreviate-file-name buffer-file-name))) |
| 795 | (munge-default-fun |
| 796 | (lambda () |
| 797 | (setq minibuffer-default find-file-default) |
| 798 | ;; Clear out this hook so it does not interfere |
| 799 | ;; with any recursive minibuffer usage. |
| 800 | (pop minibuffer-setup-hook))) |
| 801 | (minibuffer-setup-hook |
| 802 | minibuffer-setup-hook)) |
| 803 | (add-hook 'minibuffer-setup-hook munge-default-fun) |
| 804 | (read-file-name prompt nil default-directory)) |
| 805 | current-prefix-arg)) |
| 806 | |
| 807 | (defun find-file (filename &optional wildcards) |
| 808 | "Edit file FILENAME. |
| 809 | Switch to a buffer visiting file FILENAME, |
| 810 | creating one if none already exists. |
| 811 | Interactively, the default if you just type RET is the current directory, |
| 812 | but the visited file name is available through the minibuffer history: |
| 813 | type M-n to pull it into the minibuffer. |
| 814 | |
| 815 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
| 816 | expand wildcards (if any) and visit multiple files. Wildcard expansion |
| 817 | can be suppressed by setting `find-file-wildcards'." |
| 818 | (interactive |
| 819 | (find-file-read-args "Find file: ")) |
| 820 | (let ((value (find-file-noselect filename nil nil wildcards))) |
| 821 | (if (listp value) |
| 822 | (mapcar 'switch-to-buffer (nreverse value)) |
| 823 | (switch-to-buffer value)))) |
| 824 | |
| 825 | (defun find-file-other-window (filename &optional wildcards) |
| 826 | "Edit file FILENAME, in another window. |
| 827 | May create a new window, or reuse an existing one. |
| 828 | See the function `display-buffer'. |
| 829 | |
| 830 | Interactively, the default if you just type RET is the current directory, |
| 831 | but the visited file name is available through the minibuffer history: |
| 832 | type M-n to pull it into the minibuffer. |
| 833 | |
| 834 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
| 835 | expand wildcards (if any) and visit multiple files." |
| 836 | (interactive (find-file-read-args "FFind file in other window: ")) |
| 837 | (let ((value (find-file-noselect filename nil nil wildcards))) |
| 838 | (if (listp value) |
| 839 | (progn |
| 840 | (setq value (nreverse value)) |
| 841 | (switch-to-buffer-other-window (car value)) |
| 842 | (mapcar 'switch-to-buffer (cdr value))) |
| 843 | (switch-to-buffer-other-window value)))) |
| 844 | |
| 845 | (defun find-file-other-frame (filename &optional wildcards) |
| 846 | "Edit file FILENAME, in another frame. |
| 847 | May create a new frame, or reuse an existing one. |
| 848 | See the function `display-buffer'. |
| 849 | |
| 850 | Interactively, the default if you just type RET is the current directory, |
| 851 | but the visited file name is available through the minibuffer history: |
| 852 | type M-n to pull it into the minibuffer. |
| 853 | |
| 854 | Interactively, or if WILDCARDS is non-nil in a call from Lisp, |
| 855 | expand wildcards (if any) and visit multiple files." |
| 856 | (interactive (find-file-read-args "FFind file in other frame: ")) |
| 857 | (let ((value (find-file-noselect filename nil nil wildcards))) |
| 858 | (if (listp value) |
| 859 | (progn |
| 860 | (setq value (nreverse value)) |
| 861 | (switch-to-buffer-other-frame (car value)) |
| 862 | (mapcar 'switch-to-buffer (cdr value))) |
| 863 | (switch-to-buffer-other-frame value)))) |
| 864 | |
| 865 | (defun find-file-read-only (filename &optional wildcards) |
| 866 | "Edit file FILENAME but don't allow changes. |
| 867 | Like \\[find-file] but marks buffer as read-only. |
| 868 | Use \\[toggle-read-only] to permit editing." |
| 869 | (interactive (find-file-read-args "fFind file read-only: ")) |
| 870 | (find-file filename wildcards) |
| 871 | (toggle-read-only 1) |
| 872 | (current-buffer)) |
| 873 | |
| 874 | (defun find-file-read-only-other-window (filename &optional wildcards) |
| 875 | "Edit file FILENAME in another window but don't allow changes. |
| 876 | Like \\[find-file-other-window] but marks buffer as read-only. |
| 877 | Use \\[toggle-read-only] to permit editing." |
| 878 | (interactive (find-file-read-args "fFind file read-only other window: ")) |
| 879 | (find-file-other-window filename wildcards) |
| 880 | (toggle-read-only 1) |
| 881 | (current-buffer)) |
| 882 | |
| 883 | (defun find-file-read-only-other-frame (filename &optional wildcards) |
| 884 | "Edit file FILENAME in another frame but don't allow changes. |
| 885 | Like \\[find-file-other-frame] but marks buffer as read-only. |
| 886 | Use \\[toggle-read-only] to permit editing." |
| 887 | (interactive (find-file-read-args "fFind file read-only other frame: ")) |
| 888 | (find-file-other-frame filename wildcards) |
| 889 | (toggle-read-only 1) |
| 890 | (current-buffer)) |
| 891 | |
| 892 | (defun find-alternate-file-other-window (filename) |
| 893 | "Find file FILENAME as a replacement for the file in the next window. |
| 894 | This command does not select that window." |
| 895 | (interactive |
| 896 | (save-selected-window |
| 897 | (other-window 1) |
| 898 | (let ((file buffer-file-name) |
| 899 | (file-name nil) |
| 900 | (file-dir nil)) |
| 901 | (and file |
| 902 | (setq file-name (file-name-nondirectory file) |
| 903 | file-dir (file-name-directory file))) |
| 904 | (list (read-file-name |
| 905 | "Find alternate file: " file-dir nil nil file-name))))) |
| 906 | (if (one-window-p) |
| 907 | (find-file-other-window filename) |
| 908 | (save-selected-window |
| 909 | (other-window 1) |
| 910 | (find-alternate-file filename)))) |
| 911 | |
| 912 | (defun find-alternate-file (filename) |
| 913 | "Find file FILENAME, select its buffer, kill previous buffer. |
| 914 | If the current buffer now contains an empty file that you just visited |
| 915 | \(presumably by mistake), use this command to visit the file you really want." |
| 916 | (interactive |
| 917 | (let ((file buffer-file-name) |
| 918 | (file-name nil) |
| 919 | (file-dir nil)) |
| 920 | (and file |
| 921 | (setq file-name (file-name-nondirectory file) |
| 922 | file-dir (file-name-directory file))) |
| 923 | (list (read-file-name |
| 924 | "Find alternate file: " file-dir nil nil file-name)))) |
| 925 | (and (buffer-modified-p) (buffer-file-name) |
| 926 | ;; (not buffer-read-only) |
| 927 | (not (yes-or-no-p (format "Buffer %s is modified; kill anyway? " |
| 928 | (buffer-name)))) |
| 929 | (error "Aborted")) |
| 930 | (let ((obuf (current-buffer)) |
| 931 | (ofile buffer-file-name) |
| 932 | (onum buffer-file-number) |
| 933 | (otrue buffer-file-truename) |
| 934 | (oname (buffer-name))) |
| 935 | (if (get-buffer " **lose**") |
| 936 | (kill-buffer " **lose**")) |
| 937 | (rename-buffer " **lose**") |
| 938 | (unwind-protect |
| 939 | (progn |
| 940 | (unlock-buffer) |
| 941 | (setq buffer-file-name nil) |
| 942 | (setq buffer-file-number nil) |
| 943 | (setq buffer-file-truename nil) |
| 944 | (find-file filename)) |
| 945 | (cond ((eq obuf (current-buffer)) |
| 946 | (setq buffer-file-name ofile) |
| 947 | (setq buffer-file-number onum) |
| 948 | (setq buffer-file-truename otrue) |
| 949 | (lock-buffer) |
| 950 | (rename-buffer oname)))) |
| 951 | (or (eq (current-buffer) obuf) |
| 952 | (kill-buffer obuf)))) |
| 953 | \f |
| 954 | (defun create-file-buffer (filename) |
| 955 | "Create a suitably named buffer for visiting FILENAME, and return it. |
| 956 | FILENAME (sans directory) is used unchanged if that name is free; |
| 957 | otherwise a string <2> or <3> or ... is appended to get an unused name." |
| 958 | (let ((lastname (file-name-nondirectory filename))) |
| 959 | (if (string= lastname "") |
| 960 | (setq lastname filename)) |
| 961 | (generate-new-buffer lastname))) |
| 962 | |
| 963 | (defun generate-new-buffer (name) |
| 964 | "Create and return a buffer with a name based on NAME. |
| 965 | Choose the buffer's name using `generate-new-buffer-name'." |
| 966 | (get-buffer-create (generate-new-buffer-name name))) |
| 967 | |
| 968 | (defcustom automount-dir-prefix "^/tmp_mnt/" |
| 969 | "Regexp to match the automounter prefix in a directory name." |
| 970 | :group 'files |
| 971 | :type 'regexp) |
| 972 | |
| 973 | (defvar abbreviated-home-dir nil |
| 974 | "The user's homedir abbreviated according to `directory-abbrev-alist'.") |
| 975 | |
| 976 | (defun abbreviate-file-name (filename) |
| 977 | "Return a version of FILENAME shortened using `directory-abbrev-alist'. |
| 978 | This also substitutes \"~\" for the user's home directory. |
| 979 | Type \\[describe-variable] directory-abbrev-alist RET for more information." |
| 980 | ;; Get rid of the prefixes added by the automounter. |
| 981 | (if (and automount-dir-prefix |
| 982 | (string-match automount-dir-prefix filename) |
| 983 | (file-exists-p (file-name-directory |
| 984 | (substring filename (1- (match-end 0)))))) |
| 985 | (setq filename (substring filename (1- (match-end 0))))) |
| 986 | (let ((tail directory-abbrev-alist)) |
| 987 | ;; If any elt of directory-abbrev-alist matches this name, |
| 988 | ;; abbreviate accordingly. |
| 989 | (while tail |
| 990 | (if (string-match (car (car tail)) filename) |
| 991 | (setq filename |
| 992 | (concat (cdr (car tail)) (substring filename (match-end 0))))) |
| 993 | (setq tail (cdr tail))) |
| 994 | ;; Compute and save the abbreviated homedir name. |
| 995 | ;; We defer computing this until the first time it's needed, to |
| 996 | ;; give time for directory-abbrev-alist to be set properly. |
| 997 | ;; We include a slash at the end, to avoid spurious matches |
| 998 | ;; such as `/usr/foobar' when the home dir is `/usr/foo'. |
| 999 | (or abbreviated-home-dir |
| 1000 | (setq abbreviated-home-dir |
| 1001 | (let ((abbreviated-home-dir "$foo")) |
| 1002 | (concat "^" (abbreviate-file-name (expand-file-name "~")) |
| 1003 | "\\(/\\|$\\)")))) |
| 1004 | |
| 1005 | ;; If FILENAME starts with the abbreviated homedir, |
| 1006 | ;; make it start with `~' instead. |
| 1007 | (if (and (string-match abbreviated-home-dir filename) |
| 1008 | ;; If the home dir is just /, don't change it. |
| 1009 | (not (and (= (match-end 0) 1) |
| 1010 | (= (aref filename 0) ?/))) |
| 1011 | ;; MS-DOS root directories can come with a drive letter; |
| 1012 | ;; Novell Netware allows drive letters beyond `Z:'. |
| 1013 | (not (and (or (eq system-type 'ms-dos) |
| 1014 | (eq system-type 'windows-nt)) |
| 1015 | (save-match-data |
| 1016 | (string-match "^[a-zA-`]:/$" filename))))) |
| 1017 | (setq filename |
| 1018 | (concat "~" |
| 1019 | (substring filename (match-beginning 1) (match-end 1)) |
| 1020 | (substring filename (match-end 0))))) |
| 1021 | filename)) |
| 1022 | |
| 1023 | (defcustom find-file-not-true-dirname-list nil |
| 1024 | "*List of logical names for which visiting shouldn't save the true dirname. |
| 1025 | On VMS, when you visit a file using a logical name that searches a path, |
| 1026 | you may or may not want the visited file name to record the specific |
| 1027 | directory where the file was found. If you *do not* want that, add the logical |
| 1028 | name to this list as a string." |
| 1029 | :type '(repeat (string :tag "Name")) |
| 1030 | :group 'find-file) |
| 1031 | |
| 1032 | (defun find-buffer-visiting (filename) |
| 1033 | "Return the buffer visiting file FILENAME (a string). |
| 1034 | This is like `get-file-buffer', except that it checks for any buffer |
| 1035 | visiting the same file, possibly under a different name. |
| 1036 | If there is no such live buffer, return nil." |
| 1037 | (let ((buf (get-file-buffer filename)) |
| 1038 | (truename (abbreviate-file-name (file-truename filename)))) |
| 1039 | (or buf |
| 1040 | (let ((list (buffer-list)) found) |
| 1041 | (while (and (not found) list) |
| 1042 | (save-excursion |
| 1043 | (set-buffer (car list)) |
| 1044 | (if (and buffer-file-name |
| 1045 | (string= buffer-file-truename truename)) |
| 1046 | (setq found (car list)))) |
| 1047 | (setq list (cdr list))) |
| 1048 | found) |
| 1049 | (let* ((attributes (file-attributes truename)) |
| 1050 | (number (nthcdr 10 attributes)) |
| 1051 | (list (buffer-list)) found) |
| 1052 | (and buffer-file-numbers-unique |
| 1053 | number |
| 1054 | (while (and (not found) list) |
| 1055 | (with-current-buffer (car list) |
| 1056 | (if (and buffer-file-name |
| 1057 | (equal buffer-file-number number) |
| 1058 | ;; Verify this buffer's file number |
| 1059 | ;; still belongs to its file. |
| 1060 | (file-exists-p buffer-file-name) |
| 1061 | (equal (file-attributes buffer-file-name) |
| 1062 | attributes)) |
| 1063 | (setq found (car list)))) |
| 1064 | (setq list (cdr list)))) |
| 1065 | found)))) |
| 1066 | \f |
| 1067 | (defcustom find-file-wildcards t |
| 1068 | "*Non-nil means file-visiting commands should handle wildcards. |
| 1069 | For example, if you specify `*.c', that would visit all the files |
| 1070 | whose names match the pattern." |
| 1071 | :group 'files |
| 1072 | :version "20.4" |
| 1073 | :type 'boolean) |
| 1074 | |
| 1075 | (defcustom find-file-suppress-same-file-warnings nil |
| 1076 | "*Non-nil means suppress warning messages for symlinked files. |
| 1077 | When nil, Emacs prints a warning when visiting a file that is already |
| 1078 | visited, but with a different name. Setting this option to t |
| 1079 | suppresses this warning." |
| 1080 | :group 'files |
| 1081 | :version "21.1" |
| 1082 | :type 'boolean) |
| 1083 | |
| 1084 | (defun find-file-noselect (filename &optional nowarn rawfile wildcards) |
| 1085 | "Read file FILENAME into a buffer and return the buffer. |
| 1086 | If a buffer exists visiting FILENAME, return that one, but |
| 1087 | verify that the file has not changed since visited or saved. |
| 1088 | The buffer is not selected, just returned to the caller. |
| 1089 | Optional first arg NOWARN non-nil means suppress any warning messages. |
| 1090 | Optional second arg RAWFILE non-nil means the file is read literally. |
| 1091 | Optional third arg WILDCARDS non-nil means do wildcard processing |
| 1092 | and visit all the matching files. When wildcards are actually |
| 1093 | used and expanded, the value is a list of buffers |
| 1094 | that are visiting the various files." |
| 1095 | (setq filename |
| 1096 | (abbreviate-file-name |
| 1097 | (expand-file-name filename))) |
| 1098 | (if (file-directory-p filename) |
| 1099 | (or (and find-file-run-dired |
| 1100 | (run-hook-with-args-until-success |
| 1101 | 'find-directory-functions |
| 1102 | (if find-file-visit-truename |
| 1103 | (abbreviate-file-name (file-truename filename)) |
| 1104 | filename))) |
| 1105 | (error "%s is a directory" filename)) |
| 1106 | (if (and wildcards |
| 1107 | find-file-wildcards |
| 1108 | (not (string-match "\\`/:" filename)) |
| 1109 | (string-match "[[*?]" filename)) |
| 1110 | (let ((files (condition-case nil |
| 1111 | (file-expand-wildcards filename t) |
| 1112 | (error (list filename)))) |
| 1113 | (find-file-wildcards nil)) |
| 1114 | (if (null files) |
| 1115 | (find-file-noselect filename) |
| 1116 | (mapcar #'find-file-noselect files))) |
| 1117 | (let* ((buf (get-file-buffer filename)) |
| 1118 | (truename (abbreviate-file-name (file-truename filename))) |
| 1119 | (number (nthcdr 10 (file-attributes truename))) |
| 1120 | ;; Find any buffer for a file which has same truename. |
| 1121 | (other (and (not buf) (find-buffer-visiting filename)))) |
| 1122 | ;; Let user know if there is a buffer with the same truename. |
| 1123 | (if other |
| 1124 | (progn |
| 1125 | (or nowarn |
| 1126 | find-file-suppress-same-file-warnings |
| 1127 | (string-equal filename (buffer-file-name other)) |
| 1128 | (message "%s and %s are the same file" |
| 1129 | filename (buffer-file-name other))) |
| 1130 | ;; Optionally also find that buffer. |
| 1131 | (if (or find-file-existing-other-name find-file-visit-truename) |
| 1132 | (setq buf other)))) |
| 1133 | (if buf |
| 1134 | ;; We are using an existing buffer. |
| 1135 | (progn |
| 1136 | (or nowarn |
| 1137 | (verify-visited-file-modtime buf) |
| 1138 | (cond ((not (file-exists-p filename)) |
| 1139 | (error "File %s no longer exists!" filename)) |
| 1140 | ;; Certain files should be reverted automatically |
| 1141 | ;; if they have changed on disk and not in the buffer. |
| 1142 | ((and (not (buffer-modified-p buf)) |
| 1143 | (let ((tail revert-without-query) |
| 1144 | (found nil)) |
| 1145 | (while tail |
| 1146 | (if (string-match (car tail) filename) |
| 1147 | (setq found t)) |
| 1148 | (setq tail (cdr tail))) |
| 1149 | found)) |
| 1150 | (with-current-buffer buf |
| 1151 | (message "Reverting file %s..." filename) |
| 1152 | (revert-buffer t t) |
| 1153 | (message "Reverting file %s...done" filename))) |
| 1154 | ((yes-or-no-p |
| 1155 | (if (string= (file-name-nondirectory filename) |
| 1156 | (buffer-name buf)) |
| 1157 | (format |
| 1158 | (if (buffer-modified-p buf) |
| 1159 | "File %s changed on disk. Discard your edits? " |
| 1160 | "File %s changed on disk. Reread from disk? ") |
| 1161 | (file-name-nondirectory filename)) |
| 1162 | (format |
| 1163 | (if (buffer-modified-p buf) |
| 1164 | "File %s changed on disk. Discard your edits in %s? " |
| 1165 | "File %s changed on disk. Reread from disk into %s? ") |
| 1166 | (file-name-nondirectory filename) |
| 1167 | (buffer-name buf)))) |
| 1168 | (with-current-buffer buf |
| 1169 | (revert-buffer t t))))) |
| 1170 | (with-current-buffer buf |
| 1171 | |
| 1172 | ;; Check if a formerly read-only file has become |
| 1173 | ;; writable and vice versa, but if the buffer agrees |
| 1174 | ;; with the new state of the file, that is ok too. |
| 1175 | (let ((read-only (not (file-writable-p buffer-file-name)))) |
| 1176 | (unless (or (eq read-only buffer-file-read-only) |
| 1177 | (eq read-only buffer-read-only)) |
| 1178 | (when (or nowarn |
| 1179 | (let ((question |
| 1180 | (format "File %s is %s on disk. Change buffer mode? " |
| 1181 | buffer-file-name |
| 1182 | (if read-only "read-only" "writable")))) |
| 1183 | (y-or-n-p question))) |
| 1184 | (setq buffer-read-only read-only))) |
| 1185 | (setq buffer-file-read-only read-only)) |
| 1186 | |
| 1187 | (when (and (not (eq (not (null rawfile)) |
| 1188 | (not (null find-file-literally)))) |
| 1189 | ;; It is confusing to ask whether to visit |
| 1190 | ;; non-literally if they have the file in |
| 1191 | ;; hexl-mode. |
| 1192 | (not (eq major-mode 'hexl-mode))) |
| 1193 | (if (buffer-modified-p) |
| 1194 | (if (y-or-n-p (if rawfile |
| 1195 | "Save file and revisit literally? " |
| 1196 | "Save file and revisit non-literally? ")) |
| 1197 | (progn |
| 1198 | (save-buffer) |
| 1199 | (find-file-noselect-1 buf filename nowarn |
| 1200 | rawfile truename number)) |
| 1201 | (if (y-or-n-p (if rawfile |
| 1202 | "Discard your edits and revisit file literally? " |
| 1203 | "Discard your edits and revisit file non-literally? ")) |
| 1204 | (find-file-noselect-1 buf filename nowarn |
| 1205 | rawfile truename number) |
| 1206 | (error (if rawfile "File already visited non-literally" |
| 1207 | "File already visited literally")))) |
| 1208 | (if (y-or-n-p (if rawfile |
| 1209 | "Revisit file literally? " |
| 1210 | "Revisit file non-literally? ")) |
| 1211 | (find-file-noselect-1 buf filename nowarn |
| 1212 | rawfile truename number) |
| 1213 | (error (if rawfile "File already visited non-literally" |
| 1214 | "File already visited literally")))))) |
| 1215 | ;; Return the buffer we are using. |
| 1216 | buf) |
| 1217 | ;; Create a new buffer. |
| 1218 | (setq buf (create-file-buffer filename)) |
| 1219 | (set-buffer-major-mode buf) |
| 1220 | ;; find-file-noselect-1 may use a different buffer. |
| 1221 | (find-file-noselect-1 buf filename nowarn |
| 1222 | rawfile truename number)))))) |
| 1223 | |
| 1224 | (defun find-file-noselect-1 (buf filename nowarn rawfile truename number) |
| 1225 | (let ((inhibit-read-only t) |
| 1226 | error) |
| 1227 | (with-current-buffer buf |
| 1228 | (kill-local-variable 'find-file-literally) |
| 1229 | ;; Needed in case we are re-visiting the file with a different |
| 1230 | ;; text representation. |
| 1231 | (kill-local-variable 'buffer-file-coding-system) |
| 1232 | (erase-buffer) |
| 1233 | (and (default-value 'enable-multibyte-characters) |
| 1234 | (not rawfile) |
| 1235 | (set-buffer-multibyte t)) |
| 1236 | (if rawfile |
| 1237 | (condition-case () |
| 1238 | (insert-file-contents-literally filename t) |
| 1239 | (file-error |
| 1240 | (when (and (file-exists-p filename) |
| 1241 | (not (file-readable-p filename))) |
| 1242 | (kill-buffer buf) |
| 1243 | (signal 'file-error (list "File is not readable" |
| 1244 | filename))) |
| 1245 | ;; Unconditionally set error |
| 1246 | (setq error t))) |
| 1247 | (condition-case () |
| 1248 | (insert-file-contents filename t) |
| 1249 | (file-error |
| 1250 | (when (and (file-exists-p filename) |
| 1251 | (not (file-readable-p filename))) |
| 1252 | (kill-buffer buf) |
| 1253 | (signal 'file-error (list "File is not readable" |
| 1254 | filename))) |
| 1255 | ;; Run find-file-not-found-hooks until one returns non-nil. |
| 1256 | (or (run-hook-with-args-until-success 'find-file-not-found-hooks) |
| 1257 | ;; If they fail too, set error. |
| 1258 | (setq error t))))) |
| 1259 | ;; Record the file's truename, and maybe use that as visited name. |
| 1260 | (if (equal filename buffer-file-name) |
| 1261 | (setq buffer-file-truename truename) |
| 1262 | (setq buffer-file-truename |
| 1263 | (abbreviate-file-name (file-truename buffer-file-name)))) |
| 1264 | (setq buffer-file-number number) |
| 1265 | ;; On VMS, we may want to remember which directory in a search list |
| 1266 | ;; the file was found in. |
| 1267 | (and (eq system-type 'vax-vms) |
| 1268 | (let (logical) |
| 1269 | (if (string-match ":" (file-name-directory filename)) |
| 1270 | (setq logical (substring (file-name-directory filename) |
| 1271 | 0 (match-beginning 0)))) |
| 1272 | (not (member logical find-file-not-true-dirname-list))) |
| 1273 | (setq buffer-file-name buffer-file-truename)) |
| 1274 | (if find-file-visit-truename |
| 1275 | (setq buffer-file-name |
| 1276 | (setq filename |
| 1277 | (expand-file-name buffer-file-truename)))) |
| 1278 | ;; Set buffer's default directory to that of the file. |
| 1279 | (setq default-directory (file-name-directory buffer-file-name)) |
| 1280 | ;; Turn off backup files for certain file names. Since |
| 1281 | ;; this is a permanent local, the major mode won't eliminate it. |
| 1282 | (and (not (funcall backup-enable-predicate buffer-file-name)) |
| 1283 | (progn |
| 1284 | (make-local-variable 'backup-inhibited) |
| 1285 | (setq backup-inhibited t))) |
| 1286 | (if rawfile |
| 1287 | (progn |
| 1288 | (set-buffer-multibyte nil) |
| 1289 | (setq buffer-file-coding-system 'no-conversion) |
| 1290 | (make-local-variable 'find-file-literally) |
| 1291 | (setq find-file-literally t)) |
| 1292 | (after-find-file error (not nowarn))) |
| 1293 | (current-buffer)))) |
| 1294 | \f |
| 1295 | (defun insert-file-contents-literally (filename &optional visit beg end replace) |
| 1296 | "Like `insert-file-contents', but only reads in the file literally. |
| 1297 | A buffer may be modified in several ways after reading into the buffer, |
| 1298 | to Emacs features such as format decoding, character code |
| 1299 | conversion, `find-file-hooks', automatic uncompression, etc. |
| 1300 | |
| 1301 | This function ensures that none of these modifications will take place." |
| 1302 | (let ((format-alist nil) |
| 1303 | (after-insert-file-functions nil) |
| 1304 | (coding-system-for-read 'no-conversion) |
| 1305 | (coding-system-for-write 'no-conversion) |
| 1306 | (find-buffer-file-type-function |
| 1307 | (if (fboundp 'find-buffer-file-type) |
| 1308 | (symbol-function 'find-buffer-file-type) |
| 1309 | nil)) |
| 1310 | (inhibit-file-name-handlers '(jka-compr-handler image-file-handler)) |
| 1311 | (inhibit-file-name-operation 'insert-file-contents)) |
| 1312 | (unwind-protect |
| 1313 | (progn |
| 1314 | (fset 'find-buffer-file-type (lambda (filename) t)) |
| 1315 | (insert-file-contents filename visit beg end replace)) |
| 1316 | (if find-buffer-file-type-function |
| 1317 | (fset 'find-buffer-file-type find-buffer-file-type-function) |
| 1318 | (fmakunbound 'find-buffer-file-type))))) |
| 1319 | |
| 1320 | (defun insert-file-literally (filename) |
| 1321 | "Insert contents of file FILENAME into buffer after point with no conversion. |
| 1322 | |
| 1323 | This function is meant for the user to run interactively. |
| 1324 | Don't call it from programs! Use `insert-file-contents-literally' instead. |
| 1325 | \(Its calling sequence is different; see its documentation)." |
| 1326 | (interactive "*fInsert file literally: ") |
| 1327 | (if (file-directory-p filename) |
| 1328 | (signal 'file-error (list "Opening input file" "file is a directory" |
| 1329 | filename))) |
| 1330 | (let ((tem (insert-file-contents-literally filename))) |
| 1331 | (push-mark (+ (point) (car (cdr tem)))))) |
| 1332 | |
| 1333 | (defvar find-file-literally nil |
| 1334 | "Non-nil if this buffer was made by `find-file-literally' or equivalent. |
| 1335 | This is a permanent local.") |
| 1336 | (put 'find-file-literally 'permanent-local t) |
| 1337 | |
| 1338 | (defun find-file-literally (filename) |
| 1339 | "Visit file FILENAME with no conversion of any kind. |
| 1340 | Format conversion and character code conversion are both disabled, |
| 1341 | and multibyte characters are disabled in the resulting buffer. |
| 1342 | The major mode used is Fundamental mode regardless of the file name, |
| 1343 | and local variable specifications in the file are ignored. |
| 1344 | Automatic uncompression and adding a newline at the end of the |
| 1345 | file due to `require-final-newline' is also disabled. |
| 1346 | |
| 1347 | You cannot absolutely rely on this function to result in |
| 1348 | visiting the file literally. If Emacs already has a buffer |
| 1349 | which is visiting the file, you get the existing buffer, |
| 1350 | regardless of whether it was created literally or not. |
| 1351 | |
| 1352 | In a Lisp program, if you want to be sure of accessing a file's |
| 1353 | contents literally, you should create a temporary buffer and then read |
| 1354 | the file contents into it using `insert-file-contents-literally'." |
| 1355 | (interactive "FFind file literally: ") |
| 1356 | (switch-to-buffer (find-file-noselect filename nil t))) |
| 1357 | \f |
| 1358 | (defvar after-find-file-from-revert-buffer nil) |
| 1359 | |
| 1360 | (defun after-find-file (&optional error warn noauto |
| 1361 | after-find-file-from-revert-buffer |
| 1362 | nomodes) |
| 1363 | "Called after finding a file and by the default revert function. |
| 1364 | Sets buffer mode, parses local variables. |
| 1365 | Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an |
| 1366 | error in reading the file. WARN non-nil means warn if there |
| 1367 | exists an auto-save file more recent than the visited file. |
| 1368 | NOAUTO means don't mess with auto-save mode. |
| 1369 | Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil |
| 1370 | means this call was from `revert-buffer'. |
| 1371 | Fifth arg NOMODES non-nil means don't alter the file's modes. |
| 1372 | Finishes by calling the functions in `find-file-hooks' |
| 1373 | unless NOMODES is non-nil." |
| 1374 | (setq buffer-read-only (not (file-writable-p buffer-file-name))) |
| 1375 | (if noninteractive |
| 1376 | nil |
| 1377 | (let* (not-serious |
| 1378 | (msg |
| 1379 | (cond |
| 1380 | ((not warn) nil) |
| 1381 | ((and error (file-attributes buffer-file-name)) |
| 1382 | (setq buffer-read-only t) |
| 1383 | "File exists, but cannot be read") |
| 1384 | ((not buffer-read-only) |
| 1385 | (if (and warn |
| 1386 | ;; No need to warn if buffer is auto-saved |
| 1387 | ;; under the name of the visited file. |
| 1388 | (not (and buffer-file-name |
| 1389 | auto-save-visited-file-name)) |
| 1390 | (file-newer-than-file-p (or buffer-auto-save-file-name |
| 1391 | (make-auto-save-file-name)) |
| 1392 | buffer-file-name)) |
| 1393 | (format "%s has auto save data; consider M-x recover-file" |
| 1394 | (file-name-nondirectory buffer-file-name)) |
| 1395 | (setq not-serious t) |
| 1396 | (if error "(New file)" nil))) |
| 1397 | ((not error) |
| 1398 | (setq not-serious t) |
| 1399 | "Note: file is write protected") |
| 1400 | ((file-attributes (directory-file-name default-directory)) |
| 1401 | "File not found and directory write-protected") |
| 1402 | ((file-exists-p (file-name-directory buffer-file-name)) |
| 1403 | (setq buffer-read-only nil)) |
| 1404 | (t |
| 1405 | (setq buffer-read-only nil) |
| 1406 | (if (file-exists-p (file-name-directory (directory-file-name (file-name-directory buffer-file-name)))) |
| 1407 | "Use M-x make-directory RET RET to create the directory" |
| 1408 | "Use C-u M-x make-directory RET RET to create directory and its parents"))))) |
| 1409 | (when msg |
| 1410 | (message "%s" msg) |
| 1411 | (or not-serious (sit-for 1 nil t)))) |
| 1412 | (when (and auto-save-default (not noauto)) |
| 1413 | (auto-save-mode t))) |
| 1414 | ;; Make people do a little extra work (C-x C-q) |
| 1415 | ;; before altering a backup file. |
| 1416 | (when (backup-file-name-p buffer-file-name) |
| 1417 | (setq buffer-read-only t)) |
| 1418 | (unless nomodes |
| 1419 | (when (and view-read-only view-mode) |
| 1420 | (view-mode-disable)) |
| 1421 | (normal-mode t) |
| 1422 | (when (and buffer-read-only |
| 1423 | view-read-only |
| 1424 | (not (eq (get major-mode 'mode-class) 'special))) |
| 1425 | (view-mode-enter)) |
| 1426 | (run-hooks 'find-file-hooks))) |
| 1427 | |
| 1428 | (defun normal-mode (&optional find-file) |
| 1429 | "Choose the major mode for this buffer automatically. |
| 1430 | Also sets up any specified local variables of the file. |
| 1431 | Uses the visited file name, the -*- line, and the local variables spec. |
| 1432 | |
| 1433 | This function is called automatically from `find-file'. In that case, |
| 1434 | we may set up the file-specified mode and local variables, |
| 1435 | depending on the value of `enable-local-variables': if it is t, we do; |
| 1436 | if it is nil, we don't; otherwise, we query. |
| 1437 | In addition, if `local-enable-local-variables' is nil, we do |
| 1438 | not set local variables (though we do notice a mode specified with -*-.) |
| 1439 | |
| 1440 | `enable-local-variables' is ignored if you run `normal-mode' interactively, |
| 1441 | or from Lisp without specifying the optional argument FIND-FILE; |
| 1442 | in that case, this function acts as if `enable-local-variables' were t." |
| 1443 | (interactive) |
| 1444 | (or find-file (funcall (or default-major-mode 'fundamental-mode))) |
| 1445 | (condition-case err |
| 1446 | (set-auto-mode) |
| 1447 | (error (message "File mode specification error: %s" |
| 1448 | (prin1-to-string err)))) |
| 1449 | (condition-case err |
| 1450 | (let ((enable-local-variables (or (not find-file) |
| 1451 | enable-local-variables))) |
| 1452 | (hack-local-variables)) |
| 1453 | (error (message "File local-variables error: %s" |
| 1454 | (prin1-to-string err))))) |
| 1455 | |
| 1456 | (defvar auto-mode-alist |
| 1457 | (mapc |
| 1458 | (lambda (elt) |
| 1459 | (cons (purecopy (car elt)) (cdr elt))) |
| 1460 | '(("\\.te?xt\\'" . text-mode) |
| 1461 | ("\\.c\\'" . c-mode) |
| 1462 | ("\\.h\\'" . c-mode) |
| 1463 | ("\\.tex\\'" . tex-mode) |
| 1464 | ("\\.ltx\\'" . latex-mode) |
| 1465 | ("\\.el\\'" . emacs-lisp-mode) |
| 1466 | ("\\.scm\\'" . scheme-mode) |
| 1467 | ("\\.l\\'" . lisp-mode) |
| 1468 | ("\\.lisp\\'" . lisp-mode) |
| 1469 | ("\\.f\\'" . fortran-mode) |
| 1470 | ("\\.F\\'" . fortran-mode) |
| 1471 | ("\\.for\\'" . fortran-mode) |
| 1472 | ("\\.p\\'" . pascal-mode) |
| 1473 | ("\\.pas\\'" . pascal-mode) |
| 1474 | ("\\.ad[abs]\\'" . ada-mode) |
| 1475 | ("\\.\\([pP]\\([Llm]\\|erl\\)\\|al\\)\\'" . perl-mode) |
| 1476 | ("\\.s?html?\\'" . html-mode) |
| 1477 | ("\\.cc\\'" . c++-mode) |
| 1478 | ("\\.hh\\'" . c++-mode) |
| 1479 | ("\\.hpp\\'" . c++-mode) |
| 1480 | ("\\.C\\'" . c++-mode) |
| 1481 | ("\\.H\\'" . c++-mode) |
| 1482 | ("\\.cpp\\'" . c++-mode) |
| 1483 | ("\\.cxx\\'" . c++-mode) |
| 1484 | ("\\.hxx\\'" . c++-mode) |
| 1485 | ("\\.c\\+\\+\\'" . c++-mode) |
| 1486 | ("\\.h\\+\\+\\'" . c++-mode) |
| 1487 | ("\\.m\\'" . objc-mode) |
| 1488 | ("\\.java\\'" . java-mode) |
| 1489 | ("\\.mk\\'" . makefile-mode) |
| 1490 | ("\\(M\\|m\\|GNUm\\)akefile\\(\\.in\\)?\\'" . makefile-mode) |
| 1491 | ("\\.am\\'" . makefile-mode) ;For Automake. |
| 1492 | ;; Less common extensions come here |
| 1493 | ;; so more common ones above are found faster. |
| 1494 | ("\\.texinfo\\'" . texinfo-mode) |
| 1495 | ("\\.te?xi\\'" . texinfo-mode) |
| 1496 | ("\\.s\\'" . asm-mode) |
| 1497 | ("\\.S\\'" . asm-mode) |
| 1498 | ("\\.asm\\'" . asm-mode) |
| 1499 | ("ChangeLog\\'" . change-log-mode) |
| 1500 | ("change\\.log\\'" . change-log-mode) |
| 1501 | ("changelo\\'" . change-log-mode) |
| 1502 | ("ChangeLog\\.[0-9]+\\'" . change-log-mode) |
| 1503 | ;; for MSDOS and MS-Windows (which are case-insensitive) |
| 1504 | ("changelog\\'" . change-log-mode) |
| 1505 | ("changelog\\.[0-9]+\\'" . change-log-mode) |
| 1506 | ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode) |
| 1507 | ("\\.scm\\.[0-9]*\\'" . scheme-mode) |
| 1508 | ("\\.[ck]?sh\\'\\|\\.shar\\'\\|/\\.z?profile\\'" . sh-mode) |
| 1509 | ("\\(/\\|\\`\\)\\.\\(bash_profile\\|z?login\\|bash_login\\|z?logout\\)\\'" . sh-mode) |
| 1510 | ("\\(/\\|\\`\\)\\.\\(bash_logout\\|shrc\\|[kz]shrc\\|bashrc\\|t?cshrc\\|esrc\\)\\'" . sh-mode) |
| 1511 | ("\\(/\\|\\`\\)\\.\\([kz]shenv\\|xinitrc\\|startxrc\\|xsession\\)\\'" . sh-mode) |
| 1512 | ("\\.m?spec\\'" . sh-mode) |
| 1513 | ("\\.mm\\'" . nroff-mode) |
| 1514 | ("\\.me\\'" . nroff-mode) |
| 1515 | ("\\.ms\\'" . nroff-mode) |
| 1516 | ("\\.man\\'" . nroff-mode) |
| 1517 | ("\\.\\(u?lpc\\|pike\\|pmod\\)\\'" . pike-mode) |
| 1518 | ("\\.TeX\\'" . tex-mode) |
| 1519 | ("\\.sty\\'" . latex-mode) |
| 1520 | ("\\.cls\\'" . latex-mode) ;LaTeX 2e class |
| 1521 | ("\\.clo\\'" . latex-mode) ;LaTeX 2e class option |
| 1522 | ("\\.bbl\\'" . latex-mode) |
| 1523 | ("\\.bib\\'" . bibtex-mode) |
| 1524 | ("\\.sql\\'" . sql-mode) |
| 1525 | ("\\.m4\\'" . m4-mode) |
| 1526 | ("\\.mc\\'" . m4-mode) |
| 1527 | ("\\.mf\\'" . metafont-mode) |
| 1528 | ("\\.mp\\'" . metapost-mode) |
| 1529 | ("\\.vhdl?\\'" . vhdl-mode) |
| 1530 | ("\\.article\\'" . text-mode) |
| 1531 | ("\\.letter\\'" . text-mode) |
| 1532 | ("\\.tcl\\'" . tcl-mode) |
| 1533 | ("\\.exp\\'" . tcl-mode) |
| 1534 | ("\\.itcl\\'" . tcl-mode) |
| 1535 | ("\\.itk\\'" . tcl-mode) |
| 1536 | ("\\.icn\\'" . icon-mode) |
| 1537 | ("\\.sim\\'" . simula-mode) |
| 1538 | ("\\.mss\\'" . scribe-mode) |
| 1539 | ("\\.f90\\'" . f90-mode) |
| 1540 | ("\\.f95\\'" . f90-mode) |
| 1541 | ("\\.indent\\.pro\\'" . fundamental-mode) ; to avoid idlwave-mode |
| 1542 | ("\\.pro\\'" . idlwave-mode) |
| 1543 | ("\\.lsp\\'" . lisp-mode) |
| 1544 | ("\\.awk\\'" . awk-mode) |
| 1545 | ("\\.prolog\\'" . prolog-mode) |
| 1546 | ("\\.tar\\'" . tar-mode) |
| 1547 | ("\\.\\(arc\\|zip\\|lzh\\|zoo\\|jar\\)\\'" . archive-mode) |
| 1548 | ("\\.\\(ARC\\|ZIP\\|LZH\\|ZOO\\|JAR\\)\\'" . archive-mode) |
| 1549 | ;; Mailer puts message to be edited in |
| 1550 | ;; /tmp/Re.... or Message |
| 1551 | ("\\`/tmp/Re" . text-mode) |
| 1552 | ("/Message[0-9]*\\'" . text-mode) |
| 1553 | ("/drafts/[0-9]+\\'" . mh-letter-mode) |
| 1554 | ("\\.zone\\'" . zone-mode) |
| 1555 | ;; some news reader is reported to use this |
| 1556 | ("\\`/tmp/fol/" . text-mode) |
| 1557 | ("\\.y\\'" . c-mode) |
| 1558 | ("\\.lex\\'" . c-mode) |
| 1559 | ("\\.oak\\'" . scheme-mode) |
| 1560 | ("\\.sgml?\\'" . sgml-mode) |
| 1561 | ("\\.xml\\'" . sgml-mode) |
| 1562 | ("\\.dtd\\'" . sgml-mode) |
| 1563 | ("\\.ds\\(ss\\)?l\\'" . dsssl-mode) |
| 1564 | ("\\.idl\\'" . idl-mode) |
| 1565 | ;; .emacs following a directory delimiter |
| 1566 | ;; in Unix, MSDOG or VMS syntax. |
| 1567 | ("[]>:/\\]\\..*emacs\\'" . emacs-lisp-mode) |
| 1568 | ("\\`\\..*emacs\\'" . emacs-lisp-mode) |
| 1569 | ;; _emacs following a directory delimiter |
| 1570 | ;; in MsDos syntax |
| 1571 | ("[:/]_emacs\\'" . emacs-lisp-mode) |
| 1572 | ("/crontab\\.X*[0-9]+\\'" . shell-script-mode) |
| 1573 | ("\\.ml\\'" . lisp-mode) |
| 1574 | ("\\.\\(asn\\|mib\\|smi\\)\\'" . snmp-mode) |
| 1575 | ("\\.\\(as\\|mi\\|sm\\)2\\'" . snmpv2-mode) |
| 1576 | ("\\.\\(diffs?\\|patch\\|rej\\)\\'" . diff-mode) |
| 1577 | ("\\.\\(dif\\|pat\\)\\'" . diff-mode) ; for MSDOG |
| 1578 | ("\\.[eE]?[pP][sS]\\'" . ps-mode) |
| 1579 | ("configure\\.\\(ac\\|in\\)\\'" . autoconf-mode) |
| 1580 | ("BROWSE\\'" . ebrowse-tree-mode) |
| 1581 | ("\\.ebrowse\\'" . ebrowse-tree-mode) |
| 1582 | ("#\\*mail\\*" . mail-mode) |
| 1583 | ;; Get rid of any trailing .n.m and try again. |
| 1584 | ;; This is for files saved by cvs-merge that look like .#<file>.<rev> |
| 1585 | ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~. |
| 1586 | ;; Using mode nil rather than `ignore' would let the search continue |
| 1587 | ;; through this list (with the shortened name) rather than start over. |
| 1588 | ("\\.~?[0-9]+\\.[0-9][-.0-9]*~?\\'" ignore t) |
| 1589 | ;; The following should come after the ChangeLog pattern |
| 1590 | ;; for the sake of ChangeLog.1, etc. |
| 1591 | ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too. |
| 1592 | ("\\.[1-9]\\'" . nroff-mode) |
| 1593 | ("\\.g\\'" . antlr-mode))) |
| 1594 | "Alist of filename patterns vs corresponding major mode functions. |
| 1595 | Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL). |
| 1596 | \(NON-NIL stands for anything that is not nil; the value does not matter.) |
| 1597 | Visiting a file whose name matches REGEXP specifies FUNCTION as the |
| 1598 | mode function to use. FUNCTION will be called, unless it is nil. |
| 1599 | |
| 1600 | If the element has the form (REGEXP FUNCTION NON-NIL), then after |
| 1601 | calling FUNCTION (if it's not nil), we delete the suffix that matched |
| 1602 | REGEXP and search the list again for another match.") |
| 1603 | |
| 1604 | |
| 1605 | (defvar interpreter-mode-alist |
| 1606 | (mapc |
| 1607 | (lambda (l) |
| 1608 | (cons (purecopy (car l)) (cdr l))) |
| 1609 | '(("perl" . perl-mode) |
| 1610 | ("perl5" . perl-mode) |
| 1611 | ("miniperl" . perl-mode) |
| 1612 | ("wish" . tcl-mode) |
| 1613 | ("wishx" . tcl-mode) |
| 1614 | ("tcl" . tcl-mode) |
| 1615 | ("tclsh" . tcl-mode) |
| 1616 | ("awk" . awk-mode) |
| 1617 | ("mawk" . awk-mode) |
| 1618 | ("nawk" . awk-mode) |
| 1619 | ("gawk" . awk-mode) |
| 1620 | ("scm" . scheme-mode) |
| 1621 | ("ash" . sh-mode) |
| 1622 | ("bash" . sh-mode) |
| 1623 | ("bash2" . sh-mode) |
| 1624 | ("csh" . sh-mode) |
| 1625 | ("dtksh" . sh-mode) |
| 1626 | ("es" . sh-mode) |
| 1627 | ("itcsh" . sh-mode) |
| 1628 | ("jsh" . sh-mode) |
| 1629 | ("ksh" . sh-mode) |
| 1630 | ("oash" . sh-mode) |
| 1631 | ("pdksh" . sh-mode) |
| 1632 | ("rc" . sh-mode) |
| 1633 | ("rpm" . sh-mode) |
| 1634 | ("sh" . sh-mode) |
| 1635 | ("sh5" . sh-mode) |
| 1636 | ("tcsh" . sh-mode) |
| 1637 | ("wksh" . sh-mode) |
| 1638 | ("wsh" . sh-mode) |
| 1639 | ("zsh" . sh-mode) |
| 1640 | ("tail" . text-mode) |
| 1641 | ("more" . text-mode) |
| 1642 | ("less" . text-mode) |
| 1643 | ("pg" . text-mode) |
| 1644 | ("make" . makefile-mode) ; Debian uses this |
| 1645 | ("guile" . scheme-mode) |
| 1646 | ("clisp" . lisp-mode))) |
| 1647 | "Alist mapping interpreter names to major modes. |
| 1648 | This alist applies to files whose first line starts with `#!'. |
| 1649 | Each element looks like (INTERPRETER . MODE). |
| 1650 | The car of each element is compared with |
| 1651 | the name of the interpreter specified in the first line. |
| 1652 | If it matches, mode MODE is selected.") |
| 1653 | |
| 1654 | (defvar inhibit-first-line-modes-regexps '("\\.tar\\'" "\\.tgz\\'") |
| 1655 | "List of regexps; if one matches a file name, don't look for `-*-'.") |
| 1656 | |
| 1657 | (defvar inhibit-first-line-modes-suffixes nil |
| 1658 | "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'. |
| 1659 | When checking `inhibit-first-line-modes-regexps', we first discard |
| 1660 | from the end of the file name anything that matches one of these regexps.") |
| 1661 | |
| 1662 | (defvar auto-mode-interpreter-regexp |
| 1663 | "#![ \t]?\\([^ \t\n]*\ |
| 1664 | /bin/env[ \t]\\)?\\([^ \t\n]+\\)" |
| 1665 | "Regular expression matching interpreters, for file mode determination. |
| 1666 | This regular expression is matched against the first line of a file |
| 1667 | to determine the file's mode in `set-auto-mode' when Emacs can't deduce |
| 1668 | a mode from the file's name. If it matches, the file is assumed to |
| 1669 | be interpreted by the interpreter matched by the second group of the |
| 1670 | regular expression. The mode is then determined as the mode associated |
| 1671 | with that interpreter in `interpreter-mode-alist'.") |
| 1672 | |
| 1673 | (defun set-auto-mode (&optional just-from-file-name) |
| 1674 | "Select major mode appropriate for current buffer. |
| 1675 | This checks for a -*- mode tag in the buffer's text, |
| 1676 | compares the filename against the entries in `auto-mode-alist', |
| 1677 | or checks the interpreter that runs this file against |
| 1678 | `interpreter-mode-alist'. |
| 1679 | |
| 1680 | It does not check for the `mode:' local variable in the |
| 1681 | Local Variables section of the file; for that, use `hack-local-variables'. |
| 1682 | |
| 1683 | If `enable-local-variables' is nil, this function does not check for a |
| 1684 | -*- mode tag. |
| 1685 | |
| 1686 | If the optional argument JUST-FROM-FILE-NAME is non-nil, |
| 1687 | then we do not set anything but the major mode, |
| 1688 | and we don't even do that unless it would come from the file name." |
| 1689 | ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- |
| 1690 | (let (end done modes) |
| 1691 | (save-excursion |
| 1692 | (goto-char (point-min)) |
| 1693 | (skip-chars-forward " \t\n") |
| 1694 | (and enable-local-variables |
| 1695 | (setq end (set-auto-mode-1)) |
| 1696 | (if (save-excursion (search-forward ":" end t)) |
| 1697 | ;; Find all specifications for the `mode:' variable |
| 1698 | ;; and execute them left to right. |
| 1699 | (while (let ((case-fold-search t)) |
| 1700 | (or (and (looking-at "mode:") |
| 1701 | (goto-char (match-end 0))) |
| 1702 | (re-search-forward "[ \t;]mode:" end t))) |
| 1703 | (skip-chars-forward " \t") |
| 1704 | (let ((beg (point))) |
| 1705 | (if (search-forward ";" end t) |
| 1706 | (forward-char -1) |
| 1707 | (goto-char end)) |
| 1708 | (skip-chars-backward " \t") |
| 1709 | (push (intern (concat (downcase (buffer-substring beg (point))) "-mode")) |
| 1710 | modes))) |
| 1711 | ;; Simple -*-MODE-*- case. |
| 1712 | (push (intern (concat (downcase (buffer-substring (point) end)) |
| 1713 | "-mode")) |
| 1714 | modes)))) |
| 1715 | ;; If we found modes to use, invoke them now, |
| 1716 | ;; outside the save-excursion. |
| 1717 | (unless just-from-file-name |
| 1718 | (dolist (mode (nreverse modes)) |
| 1719 | (if (not (functionp mode)) |
| 1720 | (message "Ignoring unknown mode `%s'" mode) |
| 1721 | (setq done t) |
| 1722 | (funcall mode)))) |
| 1723 | ;; If we didn't find a mode from a -*- line, try using the file name. |
| 1724 | (if (and (not done) buffer-file-name) |
| 1725 | (let ((name buffer-file-name) |
| 1726 | (keep-going t)) |
| 1727 | ;; Remove backup-suffixes from file name. |
| 1728 | (setq name (file-name-sans-versions name)) |
| 1729 | (while keep-going |
| 1730 | (setq keep-going nil) |
| 1731 | (let ((alist auto-mode-alist) |
| 1732 | (mode nil)) |
| 1733 | ;; Find first matching alist entry. |
| 1734 | (let ((case-fold-search |
| 1735 | (memq system-type '(vax-vms windows-nt)))) |
| 1736 | (while (and (not mode) alist) |
| 1737 | (if (string-match (car (car alist)) name) |
| 1738 | (if (and (consp (cdr (car alist))) |
| 1739 | (nth 2 (car alist))) |
| 1740 | (setq mode (car (cdr (car alist))) |
| 1741 | name (substring name 0 (match-beginning 0)) |
| 1742 | keep-going t) |
| 1743 | (setq mode (cdr (car alist)) |
| 1744 | keep-going nil))) |
| 1745 | (setq alist (cdr alist)))) |
| 1746 | (if mode |
| 1747 | ;; When JUST-FROM-FILE-NAME is set, |
| 1748 | ;; we are working on behalf of set-visited-file-name. |
| 1749 | ;; In that case, if the major mode specified is the |
| 1750 | ;; same one we already have, don't actually reset it. |
| 1751 | ;; We don't want to lose minor modes such as Font Lock. |
| 1752 | (unless (and just-from-file-name (eq mode major-mode)) |
| 1753 | (funcall mode)) |
| 1754 | ;; If we can't deduce a mode from the file name, |
| 1755 | ;; look for an interpreter specified in the first line. |
| 1756 | ;; As a special case, allow for things like "#!/bin/env perl", |
| 1757 | ;; which finds the interpreter anywhere in $PATH. |
| 1758 | (let ((interpreter |
| 1759 | (save-excursion |
| 1760 | (goto-char (point-min)) |
| 1761 | (if (looking-at auto-mode-interpreter-regexp) |
| 1762 | (match-string 2) |
| 1763 | ""))) |
| 1764 | elt) |
| 1765 | ;; Map interpreter name to a mode. |
| 1766 | (setq elt (assoc (file-name-nondirectory interpreter) |
| 1767 | interpreter-mode-alist)) |
| 1768 | (unless just-from-file-name |
| 1769 | (if elt |
| 1770 | (funcall (cdr elt)))))))))))) |
| 1771 | |
| 1772 | |
| 1773 | (defun set-auto-mode-1 () |
| 1774 | "Find the -*- spec in the buffer. |
| 1775 | Call with point at the place to start searching from. |
| 1776 | If one is found, set point to the beginning |
| 1777 | and return the position of the end. |
| 1778 | Otherwise, return nil; point may be changed." |
| 1779 | (let (beg end) |
| 1780 | (and |
| 1781 | ;; Don't look for -*- if this file name matches any |
| 1782 | ;; of the regexps in inhibit-first-line-modes-regexps. |
| 1783 | (let ((temp inhibit-first-line-modes-regexps) |
| 1784 | (name (if buffer-file-name |
| 1785 | (file-name-sans-versions buffer-file-name) |
| 1786 | (buffer-name)))) |
| 1787 | (while (let ((sufs inhibit-first-line-modes-suffixes)) |
| 1788 | (while (and sufs (not (string-match (car sufs) name))) |
| 1789 | (setq sufs (cdr sufs))) |
| 1790 | sufs) |
| 1791 | (setq name (substring name 0 (match-beginning 0)))) |
| 1792 | (while (and temp |
| 1793 | (not (string-match (car temp) name))) |
| 1794 | (setq temp (cdr temp))) |
| 1795 | (not temp)) |
| 1796 | |
| 1797 | (search-forward "-*-" (save-excursion |
| 1798 | ;; If the file begins with "#!" |
| 1799 | ;; (exec interpreter magic), look |
| 1800 | ;; for mode frobs in the first two |
| 1801 | ;; lines. You cannot necessarily |
| 1802 | ;; put them in the first line of |
| 1803 | ;; such a file without screwing up |
| 1804 | ;; the interpreter invocation. |
| 1805 | (end-of-line (and (looking-at "^#!") 2)) |
| 1806 | (point)) t) |
| 1807 | (progn |
| 1808 | (skip-chars-forward " \t") |
| 1809 | (setq beg (point)) |
| 1810 | (search-forward "-*-" |
| 1811 | (save-excursion (end-of-line) (point)) |
| 1812 | t)) |
| 1813 | (progn |
| 1814 | (forward-char -3) |
| 1815 | (skip-chars-backward " \t") |
| 1816 | (setq end (point)) |
| 1817 | (goto-char beg) |
| 1818 | end)))) |
| 1819 | |
| 1820 | (defun hack-local-variables-prop-line () |
| 1821 | "Set local variables specified in the -*- line. |
| 1822 | Ignore any specification for `mode:' and `coding:'; |
| 1823 | `set-auto-mode' should already have handled `mode:', |
| 1824 | `set-auto-coding' should already have handled `coding:'." |
| 1825 | (save-excursion |
| 1826 | (goto-char (point-min)) |
| 1827 | (let ((result nil) |
| 1828 | (end (set-auto-mode-1)) |
| 1829 | (enable-local-variables |
| 1830 | (and local-enable-local-variables enable-local-variables))) |
| 1831 | ;; Parse the -*- line into the `result' alist. |
| 1832 | (cond ((not end) |
| 1833 | nil) |
| 1834 | ((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)") |
| 1835 | ;; Simple form: "-*- MODENAME -*-". Already handled. |
| 1836 | nil) |
| 1837 | (t |
| 1838 | ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-' |
| 1839 | ;; (last ";" is optional). |
| 1840 | (while (< (point) end) |
| 1841 | (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*") |
| 1842 | (error "Malformed -*- line")) |
| 1843 | (goto-char (match-end 0)) |
| 1844 | ;; There used to be a downcase here, |
| 1845 | ;; but the manual didn't say so, |
| 1846 | ;; and people want to set var names that aren't all lc. |
| 1847 | (let ((key (intern (buffer-substring |
| 1848 | (match-beginning 1) |
| 1849 | (match-end 1)))) |
| 1850 | (val (save-restriction |
| 1851 | (narrow-to-region (point) end) |
| 1852 | (read (current-buffer))))) |
| 1853 | ;; It is traditional to ignore |
| 1854 | ;; case when checking for `mode' in set-auto-mode, |
| 1855 | ;; so we must do that here as well. |
| 1856 | ;; That is inconsistent, but we're stuck with it. |
| 1857 | ;; The same can be said for `coding' in set-auto-coding. |
| 1858 | (or (equal (downcase (symbol-name key)) "mode") |
| 1859 | (equal (downcase (symbol-name key)) "coding") |
| 1860 | (setq result (cons (cons key val) result))) |
| 1861 | (skip-chars-forward " \t;"))) |
| 1862 | (setq result (nreverse result)))) |
| 1863 | |
| 1864 | (if (and result |
| 1865 | (or (eq enable-local-variables t) |
| 1866 | (and enable-local-variables |
| 1867 | (save-window-excursion |
| 1868 | (condition-case nil |
| 1869 | (switch-to-buffer (current-buffer)) |
| 1870 | (error |
| 1871 | ;; If we fail to switch in the selected window, |
| 1872 | ;; it is probably a minibuffer. |
| 1873 | ;; So try another window. |
| 1874 | (condition-case nil |
| 1875 | (switch-to-buffer-other-window (current-buffer)) |
| 1876 | (error |
| 1877 | (switch-to-buffer-other-frame (current-buffer)))))) |
| 1878 | (y-or-n-p (format "Set local variables as specified in -*- line of %s? " |
| 1879 | (file-name-nondirectory buffer-file-name))))))) |
| 1880 | (let ((enable-local-eval enable-local-eval)) |
| 1881 | (while result |
| 1882 | (hack-one-local-variable (car (car result)) (cdr (car result))) |
| 1883 | (setq result (cdr result)))))))) |
| 1884 | |
| 1885 | (defvar hack-local-variables-hook nil |
| 1886 | "Normal hook run after processing a file's local variables specs. |
| 1887 | Major modes can use this to examine user-specified local variables |
| 1888 | in order to initialize other data structure based on them.") |
| 1889 | |
| 1890 | (defun hack-local-variables (&optional mode-only) |
| 1891 | "Parse and put into effect this buffer's local variables spec. |
| 1892 | If MODE-ONLY is non-nil, all we do is check whether the major mode |
| 1893 | is specified, returning t if it is specified." |
| 1894 | (unless mode-only |
| 1895 | (hack-local-variables-prop-line)) |
| 1896 | ;; Look for "Local variables:" line in last page. |
| 1897 | (let (mode-specified |
| 1898 | (enable-local-variables |
| 1899 | (and local-enable-local-variables enable-local-variables))) |
| 1900 | (save-excursion |
| 1901 | (goto-char (point-max)) |
| 1902 | (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) |
| 1903 | (if (let ((case-fold-search t)) |
| 1904 | (and (search-forward "Local Variables:" nil t) |
| 1905 | (or (eq enable-local-variables t) |
| 1906 | mode-only |
| 1907 | (and enable-local-variables |
| 1908 | (save-window-excursion |
| 1909 | (switch-to-buffer (current-buffer)) |
| 1910 | (save-excursion |
| 1911 | (beginning-of-line) |
| 1912 | (set-window-start (selected-window) (point))) |
| 1913 | (y-or-n-p (format "Set local variables as specified at end of %s? " |
| 1914 | (if buffer-file-name |
| 1915 | (file-name-nondirectory |
| 1916 | buffer-file-name) |
| 1917 | (concat "buffer " |
| 1918 | (buffer-name)))))))))) |
| 1919 | (let ((continue t) |
| 1920 | prefix prefixlen suffix beg |
| 1921 | mode-specified |
| 1922 | (enable-local-eval enable-local-eval)) |
| 1923 | ;; The prefix is what comes before "local variables:" in its line. |
| 1924 | ;; The suffix is what comes after "local variables:" in its line. |
| 1925 | (skip-chars-forward " \t") |
| 1926 | (or (eolp) |
| 1927 | (setq suffix (buffer-substring (point) |
| 1928 | (progn (end-of-line) (point))))) |
| 1929 | (goto-char (match-beginning 0)) |
| 1930 | (or (bolp) |
| 1931 | (setq prefix |
| 1932 | (buffer-substring (point) |
| 1933 | (progn (beginning-of-line) (point))))) |
| 1934 | |
| 1935 | (if prefix (setq prefixlen (length prefix) |
| 1936 | prefix (regexp-quote prefix))) |
| 1937 | (if suffix (setq suffix (concat (regexp-quote suffix) "$"))) |
| 1938 | (while continue |
| 1939 | ;; Look at next local variable spec. |
| 1940 | (if selective-display (re-search-forward "[\n\C-m]") |
| 1941 | (forward-line 1)) |
| 1942 | ;; Skip the prefix, if any. |
| 1943 | (if prefix |
| 1944 | (if (looking-at prefix) |
| 1945 | (forward-char prefixlen) |
| 1946 | (error "Local variables entry is missing the prefix"))) |
| 1947 | ;; Find the variable name; strip whitespace. |
| 1948 | (skip-chars-forward " \t") |
| 1949 | (setq beg (point)) |
| 1950 | (skip-chars-forward "^:\n") |
| 1951 | (if (eolp) (error "Missing colon in local variables entry")) |
| 1952 | (skip-chars-backward " \t") |
| 1953 | (let* ((str (buffer-substring beg (point))) |
| 1954 | (var (read str)) |
| 1955 | val) |
| 1956 | ;; Setting variable named "end" means end of list. |
| 1957 | (if (string-equal (downcase str) "end") |
| 1958 | (setq continue nil) |
| 1959 | ;; Otherwise read the variable value. |
| 1960 | (skip-chars-forward "^:") |
| 1961 | (forward-char 1) |
| 1962 | (setq val (read (current-buffer))) |
| 1963 | (skip-chars-backward "\n") |
| 1964 | (skip-chars-forward " \t") |
| 1965 | (or (if suffix (looking-at suffix) (eolp)) |
| 1966 | (error "Local variables entry is terminated incorrectly")) |
| 1967 | (if mode-only |
| 1968 | (if (eq var 'mode) |
| 1969 | (setq mode-specified t)) |
| 1970 | ;; Set the variable. "Variables" mode and eval are funny. |
| 1971 | (hack-one-local-variable var val)))))))) |
| 1972 | (unless mode-only |
| 1973 | (run-hooks 'hack-local-variables-hook)) |
| 1974 | mode-specified)) |
| 1975 | |
| 1976 | (defvar ignored-local-variables |
| 1977 | '(enable-local-eval) |
| 1978 | "Variables to be ignored in a file's local variable spec.") |
| 1979 | |
| 1980 | ;; Get confirmation before setting these variables as locals in a file. |
| 1981 | (put 'debugger 'risky-local-variable t) |
| 1982 | (put 'enable-local-eval 'risky-local-variable t) |
| 1983 | (put 'ignored-local-variables 'risky-local-variable t) |
| 1984 | (put 'eval 'risky-local-variable t) |
| 1985 | (put 'file-name-handler-alist 'risky-local-variable t) |
| 1986 | (put 'minor-mode-alist 'risky-local-variable t) |
| 1987 | (put 'minor-mode-map-alist 'risky-local-variable t) |
| 1988 | (put 'minor-mode-overriding-map-alist 'risky-local-variable t) |
| 1989 | (put 'overriding-local-map 'risky-local-variable t) |
| 1990 | (put 'overriding-terminal-local-map 'risky-local-variable t) |
| 1991 | (put 'auto-mode-alist 'risky-local-variable t) |
| 1992 | (put 'after-load-alist 'risky-local-variable t) |
| 1993 | (put 'buffer-file-name 'risky-local-variable t) |
| 1994 | (put 'buffer-undo-list 'risky-local-variable t) |
| 1995 | (put 'buffer-auto-save-file-name 'risky-local-variable t) |
| 1996 | (put 'buffer-file-truename 'risky-local-variable t) |
| 1997 | (put 'default-text-properties 'risky-local-variable t) |
| 1998 | (put 'exec-path 'risky-local-variable t) |
| 1999 | (put 'load-path 'risky-local-variable t) |
| 2000 | (put 'exec-directory 'risky-local-variable t) |
| 2001 | (put 'process-environment 'risky-local-variable t) |
| 2002 | (put 'dabbrev-case-fold-search 'risky-local-variable t) |
| 2003 | (put 'dabbrev-case-replace 'risky-local-variable t) |
| 2004 | ;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode. |
| 2005 | (put 'outline-level 'risky-local-variable t) |
| 2006 | (put 'rmail-output-file-alist 'risky-local-variable t) |
| 2007 | (put 'font-lock-defaults 'risky-local-variable t) |
| 2008 | (put 'special-display-buffer-names 'risky-local-variable t) |
| 2009 | (put 'frame-title-format 'risky-local-variable t) |
| 2010 | (put 'global-mode-string 'risky-local-variable t) |
| 2011 | (put 'header-line-format 'risky-local-variable t) |
| 2012 | (put 'icon-title-format 'risky-local-variable t) |
| 2013 | (put 'input-method-alist 'risky-local-variable t) |
| 2014 | (put 'format-alist 'risky-local-variable t) |
| 2015 | (put 'vc-mode 'risky-local-variable t) |
| 2016 | (put 'imenu-generic-expression 'risky-local-variable t) |
| 2017 | (put 'imenu-index-alist 'risky-local-variable t) |
| 2018 | (put 'standard-input 'risky-local-variable t) |
| 2019 | (put 'standard-output 'risky-local-variable t) |
| 2020 | (put 'unread-command-events 'risky-local-variable t) |
| 2021 | (put 'max-lisp-eval-depth 'risky-local-variable t) |
| 2022 | (put 'max-specpdl-size 'risky-local-variable t) |
| 2023 | (put 'mode-line-format 'risky-local-variable t) |
| 2024 | (put 'mode-line-modified 'risky-local-variable t) |
| 2025 | (put 'mode-line-mule-info 'risky-local-variable t) |
| 2026 | (put 'mode-line-buffer-identification 'risky-local-variable t) |
| 2027 | (put 'mode-line-modes 'risky-local-variable t) |
| 2028 | (put 'mode-line-position 'risky-local-variable t) |
| 2029 | (put 'display-time-string 'risky-local-variable t) |
| 2030 | |
| 2031 | ;; This one is safe because the user gets to check it before it is used. |
| 2032 | (put 'compile-command 'safe-local-variable t) |
| 2033 | |
| 2034 | (defun hack-one-local-variable-quotep (exp) |
| 2035 | (and (consp exp) (eq (car exp) 'quote) (consp (cdr exp)))) |
| 2036 | |
| 2037 | (defun hack-one-local-variable (var val) |
| 2038 | "\"Set\" one variable in a local variables spec. |
| 2039 | A few patterns are specified so that any name which matches one |
| 2040 | is considered risky." |
| 2041 | (cond ((eq var 'mode) |
| 2042 | (funcall (intern (concat (downcase (symbol-name val)) |
| 2043 | "-mode")))) |
| 2044 | ((eq var 'coding) |
| 2045 | ;; We have already handled coding: tag in set-auto-coding. |
| 2046 | nil) |
| 2047 | ((memq var ignored-local-variables) |
| 2048 | nil) |
| 2049 | ;; "Setting" eval means either eval it or do nothing. |
| 2050 | ;; Likewise for setting hook variables. |
| 2051 | ((or (get var 'risky-local-variable) |
| 2052 | (and |
| 2053 | (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$\\|-predicate$\\|font-lock-keywords$\\|font-lock-keywords-[0-9]+$\\|font-lock-syntactic-keywords$\\|-frame-alist$\\|-mode-alist$\\|-map$\\|-map-alist$" |
| 2054 | (symbol-name var)) |
| 2055 | (not (get var 'safe-local-variable)))) |
| 2056 | ;; Permit evalling a put of a harmless property. |
| 2057 | ;; if the args do nothing tricky. |
| 2058 | (if (or (and (eq var 'eval) |
| 2059 | (consp val) |
| 2060 | (eq (car val) 'put) |
| 2061 | (hack-one-local-variable-quotep (nth 1 val)) |
| 2062 | (hack-one-local-variable-quotep (nth 2 val)) |
| 2063 | ;; Only allow safe values of lisp-indent-hook; |
| 2064 | ;; not functions. |
| 2065 | (or (numberp (nth 3 val)) |
| 2066 | (equal (nth 3 val) ''defun)) |
| 2067 | (memq (nth 1 (nth 2 val)) |
| 2068 | '(lisp-indent-hook))) |
| 2069 | ;; Permit eval if not root and user says ok. |
| 2070 | (and (not (zerop (user-uid))) |
| 2071 | (or (eq enable-local-eval t) |
| 2072 | (and enable-local-eval |
| 2073 | (save-window-excursion |
| 2074 | (switch-to-buffer (current-buffer)) |
| 2075 | (save-excursion |
| 2076 | (beginning-of-line) |
| 2077 | (set-window-start (selected-window) (point))) |
| 2078 | (setq enable-local-eval |
| 2079 | (y-or-n-p (format "Process `eval' or hook local variables in %s? " |
| 2080 | (if buffer-file-name |
| 2081 | (concat "file " (file-name-nondirectory buffer-file-name)) |
| 2082 | (concat "buffer " (buffer-name))))))))))) |
| 2083 | (if (eq var 'eval) |
| 2084 | (save-excursion (eval val)) |
| 2085 | (make-local-variable var) |
| 2086 | (set var val)) |
| 2087 | (message "Ignoring `eval:' in the local variables list"))) |
| 2088 | ;; Ordinary variable, really set it. |
| 2089 | (t (make-local-variable var) |
| 2090 | ;; Make sure the string has no text properties. |
| 2091 | ;; Some text properties can get evaluated in various ways, |
| 2092 | ;; so it is risky to put them on with a local variable list. |
| 2093 | (if (stringp val) |
| 2094 | (set-text-properties 0 (length val) nil val)) |
| 2095 | (set var val)))) |
| 2096 | |
| 2097 | \f |
| 2098 | (defcustom change-major-mode-with-file-name t |
| 2099 | "*Non-nil means \\[write-file] should set the major mode from the file name. |
| 2100 | However, the mode will not be changed if |
| 2101 | \(1) a local variables list or the `-*-' line specifies a major mode, or |
| 2102 | \(2) the current major mode is a \"special\" mode, |
| 2103 | \ not suitable for ordinary files, or |
| 2104 | \(3) the new file name does not particularly specify any mode." |
| 2105 | :type 'boolean |
| 2106 | :group 'editing-basics) |
| 2107 | |
| 2108 | (defun set-visited-file-name (filename &optional no-query along-with-file) |
| 2109 | "Change name of file visited in current buffer to FILENAME. |
| 2110 | The next time the buffer is saved it will go in the newly specified file. |
| 2111 | nil or empty string as argument means make buffer not be visiting any file. |
| 2112 | Remember to delete the initial contents of the minibuffer |
| 2113 | if you wish to pass an empty string as the argument. |
| 2114 | |
| 2115 | The optional second argument NO-QUERY, if non-nil, inhibits asking for |
| 2116 | confirmation in the case where another buffer is already visiting FILENAME. |
| 2117 | |
| 2118 | The optional third argument ALONG-WITH-FILE, if non-nil, means that |
| 2119 | the old visited file has been renamed to the new name FILENAME." |
| 2120 | (interactive "FSet visited file name: ") |
| 2121 | (if (buffer-base-buffer) |
| 2122 | (error "An indirect buffer cannot visit a file")) |
| 2123 | (let (truename) |
| 2124 | (if filename |
| 2125 | (setq filename |
| 2126 | (if (string-equal filename "") |
| 2127 | nil |
| 2128 | (expand-file-name filename)))) |
| 2129 | (if filename |
| 2130 | (progn |
| 2131 | (setq truename (file-truename filename)) |
| 2132 | (if find-file-visit-truename |
| 2133 | (setq filename truename)))) |
| 2134 | (let ((buffer (and filename (find-buffer-visiting filename)))) |
| 2135 | (and buffer (not (eq buffer (current-buffer))) |
| 2136 | (not no-query) |
| 2137 | (not (y-or-n-p (message "A buffer is visiting %s; proceed? " |
| 2138 | filename))) |
| 2139 | (error "Aborted"))) |
| 2140 | (or (equal filename buffer-file-name) |
| 2141 | (progn |
| 2142 | (and filename (lock-buffer filename)) |
| 2143 | (unlock-buffer))) |
| 2144 | (setq buffer-file-name filename) |
| 2145 | (if filename ; make buffer name reflect filename. |
| 2146 | (let ((new-name (file-name-nondirectory buffer-file-name))) |
| 2147 | (if (string= new-name "") |
| 2148 | (error "Empty file name")) |
| 2149 | (if (eq system-type 'vax-vms) |
| 2150 | (setq new-name (downcase new-name))) |
| 2151 | (setq default-directory (file-name-directory buffer-file-name)) |
| 2152 | (or (string= new-name (buffer-name)) |
| 2153 | (rename-buffer new-name t)))) |
| 2154 | (setq buffer-backed-up nil) |
| 2155 | (or along-with-file |
| 2156 | (clear-visited-file-modtime)) |
| 2157 | ;; Abbreviate the file names of the buffer. |
| 2158 | (if truename |
| 2159 | (progn |
| 2160 | (setq buffer-file-truename (abbreviate-file-name truename)) |
| 2161 | (if find-file-visit-truename |
| 2162 | (setq buffer-file-name buffer-file-truename)))) |
| 2163 | (setq buffer-file-number |
| 2164 | (if filename |
| 2165 | (nthcdr 10 (file-attributes buffer-file-name)) |
| 2166 | nil))) |
| 2167 | ;; write-file-hooks is normally used for things like ftp-find-file |
| 2168 | ;; that visit things that are not local files as if they were files. |
| 2169 | ;; Changing to visit an ordinary local file instead should flush the hook. |
| 2170 | (kill-local-variable 'write-file-hooks) |
| 2171 | (kill-local-variable 'local-write-file-hooks) |
| 2172 | (kill-local-variable 'revert-buffer-function) |
| 2173 | (kill-local-variable 'backup-inhibited) |
| 2174 | ;; If buffer was read-only because of version control, |
| 2175 | ;; that reason is gone now, so make it writable. |
| 2176 | (if vc-mode |
| 2177 | (setq buffer-read-only nil)) |
| 2178 | (kill-local-variable 'vc-mode) |
| 2179 | ;; Turn off backup files for certain file names. |
| 2180 | ;; Since this is a permanent local, the major mode won't eliminate it. |
| 2181 | (and buffer-file-name |
| 2182 | (not (funcall backup-enable-predicate buffer-file-name)) |
| 2183 | (progn |
| 2184 | (make-local-variable 'backup-inhibited) |
| 2185 | (setq backup-inhibited t))) |
| 2186 | (let ((oauto buffer-auto-save-file-name)) |
| 2187 | ;; If auto-save was not already on, turn it on if appropriate. |
| 2188 | (if (not buffer-auto-save-file-name) |
| 2189 | (and buffer-file-name auto-save-default |
| 2190 | (auto-save-mode t)) |
| 2191 | ;; If auto save is on, start using a new name. |
| 2192 | ;; We deliberately don't rename or delete the old auto save |
| 2193 | ;; for the old visited file name. This is because perhaps |
| 2194 | ;; the user wants to save the new state and then compare with the |
| 2195 | ;; previous state from the auto save file. |
| 2196 | (setq buffer-auto-save-file-name |
| 2197 | (make-auto-save-file-name))) |
| 2198 | ;; Rename the old auto save file if any. |
| 2199 | (and oauto buffer-auto-save-file-name |
| 2200 | (file-exists-p oauto) |
| 2201 | (rename-file oauto buffer-auto-save-file-name t))) |
| 2202 | (and buffer-file-name |
| 2203 | (not along-with-file) |
| 2204 | (set-buffer-modified-p t)) |
| 2205 | ;; Update the major mode, if the file name determines it. |
| 2206 | (condition-case nil |
| 2207 | ;; Don't change the mode if it is special. |
| 2208 | (or (not change-major-mode-with-file-name) |
| 2209 | (get major-mode 'mode-class) |
| 2210 | ;; Don't change the mode if the local variable list specifies it. |
| 2211 | (hack-local-variables t) |
| 2212 | (set-auto-mode t)) |
| 2213 | (error nil))) |
| 2214 | |
| 2215 | (defun write-file (filename &optional confirm) |
| 2216 | "Write current buffer into file FILENAME. |
| 2217 | This makes the buffer visit that file, and marks it as not modified. |
| 2218 | |
| 2219 | If you specify just a directory name as FILENAME, that means to use |
| 2220 | the default file name but in that directory. You can also yank |
| 2221 | the default file name into the minibuffer to edit it, using M-n. |
| 2222 | |
| 2223 | If the buffer is not already visiting a file, the default file name |
| 2224 | for the output file is the buffer name. |
| 2225 | |
| 2226 | If optional second arg CONFIRM is non-nil, this function |
| 2227 | asks for confirmation before overwriting an existing file. |
| 2228 | Interactively, confirmation is required unless you supply a prefix argument." |
| 2229 | ;; (interactive "FWrite file: ") |
| 2230 | (interactive |
| 2231 | (list (if buffer-file-name |
| 2232 | (read-file-name "Write file: " |
| 2233 | nil nil nil nil) |
| 2234 | (read-file-name "Write file: " default-directory |
| 2235 | (expand-file-name |
| 2236 | (file-name-nondirectory (buffer-name)) |
| 2237 | default-directory) |
| 2238 | nil nil)) |
| 2239 | (not current-prefix-arg))) |
| 2240 | (or (null filename) (string-equal filename "") |
| 2241 | (progn |
| 2242 | ;; If arg is just a directory, |
| 2243 | ;; use the default file name, but in that directory. |
| 2244 | (if (file-directory-p filename) |
| 2245 | (setq filename (concat (file-name-as-directory filename) |
| 2246 | (file-name-nondirectory |
| 2247 | (or buffer-file-name (buffer-name)))))) |
| 2248 | (and confirm |
| 2249 | (file-exists-p filename) |
| 2250 | (or (y-or-n-p (format "File `%s' exists; overwrite? " filename)) |
| 2251 | (error "Canceled"))) |
| 2252 | (set-visited-file-name filename (not confirm)))) |
| 2253 | (set-buffer-modified-p t) |
| 2254 | ;; Make buffer writable if file is writable. |
| 2255 | (and buffer-file-name |
| 2256 | (file-writable-p buffer-file-name) |
| 2257 | (setq buffer-read-only nil)) |
| 2258 | (save-buffer)) |
| 2259 | \f |
| 2260 | (defun backup-buffer () |
| 2261 | "Make a backup of the disk file visited by the current buffer, if appropriate. |
| 2262 | This is normally done before saving the buffer the first time. |
| 2263 | If the value is non-nil, it is the result of `file-modes' on the original |
| 2264 | file; this means that the caller, after saving the buffer, should change |
| 2265 | the modes of the new file to agree with the old modes. |
| 2266 | |
| 2267 | A backup may be done by renaming or by copying; see documentation of |
| 2268 | variable `make-backup-files'. If it's done by renaming, then the file is |
| 2269 | no longer accessible under its old name." |
| 2270 | (if (and make-backup-files (not backup-inhibited) |
| 2271 | (not buffer-backed-up) |
| 2272 | (file-exists-p buffer-file-name) |
| 2273 | (memq (aref (elt (file-attributes buffer-file-name) 8) 0) |
| 2274 | '(?- ?l))) |
| 2275 | (let ((real-file-name buffer-file-name) |
| 2276 | backup-info backupname targets setmodes) |
| 2277 | ;; If specified name is a symbolic link, chase it to the target. |
| 2278 | ;; Thus we make the backups in the directory where the real file is. |
| 2279 | (setq real-file-name (file-chase-links real-file-name)) |
| 2280 | (setq backup-info (find-backup-file-name real-file-name) |
| 2281 | backupname (car backup-info) |
| 2282 | targets (cdr backup-info)) |
| 2283 | ;; (if (file-directory-p buffer-file-name) |
| 2284 | ;; (error "Cannot save buffer in directory %s" buffer-file-name)) |
| 2285 | (if backup-info |
| 2286 | (condition-case () |
| 2287 | (let ((delete-old-versions |
| 2288 | ;; If have old versions to maybe delete, |
| 2289 | ;; ask the user to confirm now, before doing anything. |
| 2290 | ;; But don't actually delete til later. |
| 2291 | (and targets |
| 2292 | (or (eq delete-old-versions t) (eq delete-old-versions nil)) |
| 2293 | (or delete-old-versions |
| 2294 | (y-or-n-p (format "Delete excess backup versions of %s? " |
| 2295 | real-file-name)))))) |
| 2296 | ;; Actually write the back up file. |
| 2297 | (condition-case () |
| 2298 | (if (or file-precious-flag |
| 2299 | ; (file-symlink-p buffer-file-name) |
| 2300 | backup-by-copying |
| 2301 | (and backup-by-copying-when-linked |
| 2302 | (> (file-nlinks real-file-name) 1)) |
| 2303 | (and (or backup-by-copying-when-mismatch |
| 2304 | (integerp backup-by-copying-when-privileged-mismatch)) |
| 2305 | (let ((attr (file-attributes real-file-name))) |
| 2306 | (and (or backup-by-copying-when-mismatch |
| 2307 | (and (integerp (nth 2 attr)) |
| 2308 | (integerp backup-by-copying-when-privileged-mismatch) |
| 2309 | (<= (nth 2 attr) backup-by-copying-when-privileged-mismatch))) |
| 2310 | (or (nth 9 attr) |
| 2311 | (not (file-ownership-preserved-p real-file-name))))))) |
| 2312 | (condition-case () |
| 2313 | (copy-file real-file-name backupname t t) |
| 2314 | (file-error |
| 2315 | ;; If copying fails because file BACKUPNAME |
| 2316 | ;; is not writable, delete that file and try again. |
| 2317 | (if (and (file-exists-p backupname) |
| 2318 | (not (file-writable-p backupname))) |
| 2319 | (delete-file backupname)) |
| 2320 | (copy-file real-file-name backupname t t))) |
| 2321 | ;; rename-file should delete old backup. |
| 2322 | (rename-file real-file-name backupname t) |
| 2323 | (setq setmodes (file-modes backupname))) |
| 2324 | (file-error |
| 2325 | ;; If trouble writing the backup, write it in ~. |
| 2326 | (setq backupname (expand-file-name |
| 2327 | (convert-standard-filename |
| 2328 | "~/%backup%~"))) |
| 2329 | (message "Cannot write backup file; backing up in %s" |
| 2330 | (file-name-nondirectory backupname)) |
| 2331 | (sleep-for 1) |
| 2332 | (condition-case () |
| 2333 | (copy-file real-file-name backupname t t) |
| 2334 | (file-error |
| 2335 | ;; If copying fails because file BACKUPNAME |
| 2336 | ;; is not writable, delete that file and try again. |
| 2337 | (if (and (file-exists-p backupname) |
| 2338 | (not (file-writable-p backupname))) |
| 2339 | (delete-file backupname)) |
| 2340 | (copy-file real-file-name backupname t t))))) |
| 2341 | (setq buffer-backed-up t) |
| 2342 | ;; Now delete the old versions, if desired. |
| 2343 | (if delete-old-versions |
| 2344 | (while targets |
| 2345 | (condition-case () |
| 2346 | (delete-file (car targets)) |
| 2347 | (file-error nil)) |
| 2348 | (setq targets (cdr targets)))) |
| 2349 | setmodes) |
| 2350 | (file-error nil)))))) |
| 2351 | |
| 2352 | (defun file-name-sans-versions (name &optional keep-backup-version) |
| 2353 | "Return file NAME sans backup versions or strings. |
| 2354 | This is a separate procedure so your site-init or startup file can |
| 2355 | redefine it. |
| 2356 | If the optional argument KEEP-BACKUP-VERSION is non-nil, |
| 2357 | we do not remove backup version numbers, only true file version numbers." |
| 2358 | (let ((handler (find-file-name-handler name 'file-name-sans-versions))) |
| 2359 | (if handler |
| 2360 | (funcall handler 'file-name-sans-versions name keep-backup-version) |
| 2361 | (substring name 0 |
| 2362 | (if (eq system-type 'vax-vms) |
| 2363 | ;; VMS version number is (a) semicolon, optional |
| 2364 | ;; sign, zero or more digits or (b) period, option |
| 2365 | ;; sign, zero or more digits, provided this is the |
| 2366 | ;; second period encountered outside of the |
| 2367 | ;; device/directory part of the file name. |
| 2368 | (or (string-match ";[-+]?[0-9]*\\'" name) |
| 2369 | (if (string-match "\\.[^]>:]*\\(\\.[-+]?[0-9]*\\)\\'" |
| 2370 | name) |
| 2371 | (match-beginning 1)) |
| 2372 | (length name)) |
| 2373 | (if keep-backup-version |
| 2374 | (length name) |
| 2375 | (or (string-match "\\.~[0-9.]+~\\'" name) |
| 2376 | (string-match "~\\'" name) |
| 2377 | (length name)))))))) |
| 2378 | |
| 2379 | (defun file-ownership-preserved-p (file) |
| 2380 | "Return t if deleting FILE and rewriting it would preserve the owner." |
| 2381 | (let ((handler (find-file-name-handler file 'file-ownership-preserved-p))) |
| 2382 | (if handler |
| 2383 | (funcall handler 'file-ownership-preserved-p file) |
| 2384 | (let ((attributes (file-attributes file))) |
| 2385 | ;; Return t if the file doesn't exist, since it's true that no |
| 2386 | ;; information would be lost by an (attempted) delete and create. |
| 2387 | (or (null attributes) |
| 2388 | (= (nth 2 attributes) (user-uid))))))) |
| 2389 | |
| 2390 | (defun file-name-sans-extension (filename) |
| 2391 | "Return FILENAME sans final \"extension\". |
| 2392 | The extension, in a file name, is the part that follows the last `.', |
| 2393 | except that a leading `.', if any, doesn't count." |
| 2394 | (save-match-data |
| 2395 | (let ((file (file-name-sans-versions (file-name-nondirectory filename))) |
| 2396 | directory) |
| 2397 | (if (and (string-match "\\.[^.]*\\'" file) |
| 2398 | (not (eq 0 (match-beginning 0)))) |
| 2399 | (if (setq directory (file-name-directory filename)) |
| 2400 | (expand-file-name (substring file 0 (match-beginning 0)) |
| 2401 | directory) |
| 2402 | (substring file 0 (match-beginning 0))) |
| 2403 | filename)))) |
| 2404 | |
| 2405 | (defun file-name-extension (filename &optional period) |
| 2406 | "Return FILENAME's final \"extension\". |
| 2407 | The extension, in a file name, is the part that follows the last `.', |
| 2408 | except that a leading `.', if any, doesn't count. |
| 2409 | Return nil for extensionless file names such as `foo'. |
| 2410 | Return the empty string for file names such as `foo.'. |
| 2411 | |
| 2412 | If PERIOD is non-nil, then the returned value includes the period |
| 2413 | that delimits the extension, and if FILENAME has no extension, |
| 2414 | the value is \"\"." |
| 2415 | (save-match-data |
| 2416 | (let ((file (file-name-sans-versions (file-name-nondirectory filename)))) |
| 2417 | (if (and (string-match "\\.[^.]*\\'" file) |
| 2418 | (not (eq 0 (match-beginning 0)))) |
| 2419 | (substring file (+ (match-beginning 0) (if period 0 1))) |
| 2420 | (if period |
| 2421 | ""))))) |
| 2422 | |
| 2423 | (defcustom make-backup-file-name-function nil |
| 2424 | "A function to use instead of the default `make-backup-file-name'. |
| 2425 | A value of nil gives the default `make-backup-file-name' behaviour. |
| 2426 | |
| 2427 | This could be buffer-local to do something special for specific |
| 2428 | files. If you define it, you may need to change `backup-file-name-p' |
| 2429 | and `file-name-sans-versions' too. |
| 2430 | |
| 2431 | See also `backup-directory-alist'." |
| 2432 | :group 'backup |
| 2433 | :type '(choice (const :tag "Default" nil) |
| 2434 | (function :tag "Your function"))) |
| 2435 | |
| 2436 | (defcustom backup-directory-alist nil |
| 2437 | "Alist of filename patterns and backup directory names. |
| 2438 | Each element looks like (REGEXP . DIRECTORY). Backups of files with |
| 2439 | names matching REGEXP will be made in DIRECTORY. DIRECTORY may be |
| 2440 | relative or absolute. If it is absolute, so that all matching files |
| 2441 | are backed up into the same directory, the file names in this |
| 2442 | directory will be the full name of the file backed up with all |
| 2443 | directory separators changed to `!' to prevent clashes. This will not |
| 2444 | work correctly if your filesystem truncates the resulting name. |
| 2445 | |
| 2446 | For the common case of all backups going into one directory, the alist |
| 2447 | should contain a single element pairing \".\" with the appropriate |
| 2448 | directory name. |
| 2449 | |
| 2450 | If this variable is nil, or it fails to match a filename, the backup |
| 2451 | is made in the original file's directory. |
| 2452 | |
| 2453 | On MS-DOS filesystems without long names this variable is always |
| 2454 | ignored." |
| 2455 | :group 'backup |
| 2456 | :type '(repeat (cons (regexp :tag "Regexp matching filename") |
| 2457 | (directory :tag "Backup directory name")))) |
| 2458 | |
| 2459 | (defun normal-backup-enable-predicate (name) |
| 2460 | "Default `backup-enable-predicate' function. |
| 2461 | Checks for files in `temporary-file-directory' or |
| 2462 | `small-temporary-file-directory'." |
| 2463 | (not (or (let ((comp (compare-strings temporary-file-directory 0 nil |
| 2464 | name 0 nil))) |
| 2465 | ;; Directory is under temporary-file-directory. |
| 2466 | (and (not (eq comp t)) |
| 2467 | (< comp (- (length temporary-file-directory))))) |
| 2468 | (if small-temporary-file-directory |
| 2469 | (let ((comp (compare-strings small-temporary-file-directory |
| 2470 | 0 nil |
| 2471 | name 0 nil))) |
| 2472 | ;; Directory is under small-temporary-file-directory. |
| 2473 | (and (not (eq comp t)) |
| 2474 | (< comp (- (length small-temporary-file-directory))))))))) |
| 2475 | |
| 2476 | (defun make-backup-file-name (file) |
| 2477 | "Create the non-numeric backup file name for FILE. |
| 2478 | Normally this will just be the file's name with `~' appended. |
| 2479 | Customization hooks are provided as follows. |
| 2480 | |
| 2481 | If the variable `make-backup-file-name-function' is non-nil, its value |
| 2482 | should be a function which will be called with FILE as its argument; |
| 2483 | the resulting name is used. |
| 2484 | |
| 2485 | Otherwise a match for FILE is sought in `backup-directory-alist'; see |
| 2486 | the documentation of that variable. If the directory for the backup |
| 2487 | doesn't exist, it is created." |
| 2488 | (if make-backup-file-name-function |
| 2489 | (funcall make-backup-file-name-function file) |
| 2490 | (if (and (eq system-type 'ms-dos) |
| 2491 | (not (msdos-long-file-names))) |
| 2492 | (let ((fn (file-name-nondirectory file))) |
| 2493 | (concat (file-name-directory file) |
| 2494 | (or (and (string-match "\\`[^.]+\\'" fn) |
| 2495 | (concat (match-string 0 fn) ".~")) |
| 2496 | (and (string-match "\\`[^.]+\\.\\(..?\\)?" fn) |
| 2497 | (concat (match-string 0 fn) "~"))))) |
| 2498 | (concat (make-backup-file-name-1 file) "~")))) |
| 2499 | |
| 2500 | (defun make-backup-file-name-1 (file) |
| 2501 | "Subroutine of `make-backup-file-name' and `find-backup-file-name'." |
| 2502 | (let ((alist backup-directory-alist) |
| 2503 | elt backup-directory dir-sep-string) |
| 2504 | (while alist |
| 2505 | (setq elt (pop alist)) |
| 2506 | (if (string-match (car elt) file) |
| 2507 | (setq backup-directory (cdr elt) |
| 2508 | alist nil))) |
| 2509 | (if (null backup-directory) |
| 2510 | file |
| 2511 | (unless (file-exists-p backup-directory) |
| 2512 | (condition-case nil |
| 2513 | (make-directory backup-directory 'parents) |
| 2514 | (file-error file))) |
| 2515 | (if (file-name-absolute-p backup-directory) |
| 2516 | (progn |
| 2517 | (when (memq system-type '(windows-nt ms-dos)) |
| 2518 | ;; Normalize DOSish file names: convert all slashes to |
| 2519 | ;; directory-sep-char, downcase the drive letter, if any, |
| 2520 | ;; and replace the leading "x:" with "/drive_x". |
| 2521 | (or (file-name-absolute-p file) |
| 2522 | (setq file (expand-file-name file))) ; make defaults explicit |
| 2523 | ;; Replace any invalid file-name characters (for the |
| 2524 | ;; case of backing up remote files). |
| 2525 | (setq file (expand-file-name (convert-standard-filename file))) |
| 2526 | (setq dir-sep-string (char-to-string directory-sep-char)) |
| 2527 | (if (eq (aref file 1) ?:) |
| 2528 | (setq file (concat dir-sep-string |
| 2529 | "drive_" |
| 2530 | (char-to-string (downcase (aref file 0))) |
| 2531 | (if (eq (aref file 2) directory-sep-char) |
| 2532 | "" |
| 2533 | dir-sep-string) |
| 2534 | (substring file 2))))) |
| 2535 | ;; Make the name unique by substituting directory |
| 2536 | ;; separators. It may not really be worth bothering about |
| 2537 | ;; doubling `!'s in the original name... |
| 2538 | (expand-file-name |
| 2539 | (subst-char-in-string |
| 2540 | directory-sep-char ?! |
| 2541 | (replace-regexp-in-string "!" "!!" file)) |
| 2542 | backup-directory)) |
| 2543 | (expand-file-name (file-name-nondirectory file) |
| 2544 | (file-name-as-directory |
| 2545 | (expand-file-name backup-directory |
| 2546 | (file-name-directory file)))))))) |
| 2547 | |
| 2548 | (defun backup-file-name-p (file) |
| 2549 | "Return non-nil if FILE is a backup file name (numeric or not). |
| 2550 | This is a separate function so you can redefine it for customization. |
| 2551 | You may need to redefine `file-name-sans-versions' as well." |
| 2552 | (string-match "~\\'" file)) |
| 2553 | |
| 2554 | (defvar backup-extract-version-start) |
| 2555 | |
| 2556 | ;; This is used in various files. |
| 2557 | ;; The usage of backup-extract-version-start is not very clean, |
| 2558 | ;; but I can't see a good alternative, so as of now I am leaving it alone. |
| 2559 | (defun backup-extract-version (fn) |
| 2560 | "Given the name of a numeric backup file, FN, return the backup number. |
| 2561 | Uses the free variable `backup-extract-version-start', whose value should be |
| 2562 | the index in the name where the version number begins." |
| 2563 | (if (and (string-match "[0-9]+~$" fn backup-extract-version-start) |
| 2564 | (= (match-beginning 0) backup-extract-version-start)) |
| 2565 | (string-to-int (substring fn backup-extract-version-start -1)) |
| 2566 | 0)) |
| 2567 | |
| 2568 | ;; I believe there is no need to alter this behavior for VMS; |
| 2569 | ;; since backup files are not made on VMS, it should not get called. |
| 2570 | (defun find-backup-file-name (fn) |
| 2571 | "Find a file name for a backup file FN, and suggestions for deletions. |
| 2572 | Value is a list whose car is the name for the backup file |
| 2573 | and whose cdr is a list of old versions to consider deleting now. |
| 2574 | If the value is nil, don't make a backup. |
| 2575 | Uses `backup-directory-alist' in the same way as does |
| 2576 | `make-backup-file-name'." |
| 2577 | (let ((handler (find-file-name-handler fn 'find-backup-file-name))) |
| 2578 | ;; Run a handler for this function so that ange-ftp can refuse to do it. |
| 2579 | (if handler |
| 2580 | (funcall handler 'find-backup-file-name fn) |
| 2581 | (if (or (eq version-control 'never) |
| 2582 | ;; We don't support numbered backups on plain MS-DOS |
| 2583 | ;; when long file names are unavailable. |
| 2584 | (and (eq system-type 'ms-dos) |
| 2585 | (not (msdos-long-file-names)))) |
| 2586 | (list (make-backup-file-name fn)) |
| 2587 | (let* ((basic-name (make-backup-file-name-1 fn)) |
| 2588 | (base-versions (concat (file-name-nondirectory basic-name) |
| 2589 | ".~")) |
| 2590 | (backup-extract-version-start (length base-versions)) |
| 2591 | (high-water-mark 0) |
| 2592 | (number-to-delete 0) |
| 2593 | possibilities deserve-versions-p versions) |
| 2594 | (condition-case () |
| 2595 | (setq possibilities (file-name-all-completions |
| 2596 | base-versions |
| 2597 | (file-name-directory basic-name)) |
| 2598 | versions (sort (mapcar #'backup-extract-version |
| 2599 | possibilities) |
| 2600 | #'<) |
| 2601 | high-water-mark (apply 'max 0 versions) |
| 2602 | deserve-versions-p (or version-control |
| 2603 | (> high-water-mark 0)) |
| 2604 | number-to-delete (- (length versions) |
| 2605 | kept-old-versions |
| 2606 | kept-new-versions |
| 2607 | -1)) |
| 2608 | (file-error (setq possibilities nil))) |
| 2609 | (if (not deserve-versions-p) |
| 2610 | (list (make-backup-file-name fn)) |
| 2611 | (cons (format "%s.~%d~" basic-name (1+ high-water-mark)) |
| 2612 | (if (and (> number-to-delete 0) |
| 2613 | ;; Delete nothing if there is overflow |
| 2614 | ;; in the number of versions to keep. |
| 2615 | (>= (+ kept-new-versions kept-old-versions -1) 0)) |
| 2616 | (mapcar (lambda (n) |
| 2617 | (format "%s.~%d~" basic-name n)) |
| 2618 | (let ((v (nthcdr kept-old-versions versions))) |
| 2619 | (rplacd (nthcdr (1- number-to-delete) v) ()) |
| 2620 | v)))))))))) |
| 2621 | |
| 2622 | (defun file-nlinks (filename) |
| 2623 | "Return number of names file FILENAME has." |
| 2624 | (car (cdr (file-attributes filename)))) |
| 2625 | |
| 2626 | (defun file-relative-name (filename &optional directory) |
| 2627 | "Convert FILENAME to be relative to DIRECTORY (default: `default-directory'). |
| 2628 | This function returns a relative file name which is equivalent to FILENAME |
| 2629 | when used with that default directory as the default. |
| 2630 | If this is impossible (which can happen on MSDOS and Windows |
| 2631 | when the file name and directory use different drive names) |
| 2632 | then it returns FILENAME." |
| 2633 | (save-match-data |
| 2634 | (let ((fname (expand-file-name filename))) |
| 2635 | (setq directory (file-name-as-directory |
| 2636 | (expand-file-name (or directory default-directory)))) |
| 2637 | ;; On Microsoft OSes, if FILENAME and DIRECTORY have different |
| 2638 | ;; drive names, they can't be relative, so return the absolute name. |
| 2639 | (if (and (or (eq system-type 'ms-dos) |
| 2640 | (eq system-type 'windows-nt)) |
| 2641 | (not (string-equal (substring fname 0 2) |
| 2642 | (substring directory 0 2)))) |
| 2643 | filename |
| 2644 | (let ((ancestor ".") |
| 2645 | (fname-dir (file-name-as-directory fname))) |
| 2646 | (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir)) |
| 2647 | (not (string-match (concat "^" (regexp-quote directory)) fname))) |
| 2648 | (setq directory (file-name-directory (substring directory 0 -1)) |
| 2649 | ancestor (if (equal ancestor ".") |
| 2650 | ".." |
| 2651 | (concat "../" ancestor)))) |
| 2652 | ;; Now ancestor is empty, or .., or ../.., etc. |
| 2653 | (if (string-match (concat "^" (regexp-quote directory)) fname) |
| 2654 | ;; We matched within FNAME's directory part. |
| 2655 | ;; Add the rest of FNAME onto ANCESTOR. |
| 2656 | (let ((rest (substring fname (match-end 0)))) |
| 2657 | (if (and (equal ancestor ".") |
| 2658 | (not (equal rest ""))) |
| 2659 | ;; But don't bother with ANCESTOR if it would give us `./'. |
| 2660 | rest |
| 2661 | (concat (file-name-as-directory ancestor) rest))) |
| 2662 | ;; We matched FNAME's directory equivalent. |
| 2663 | ancestor)))))) |
| 2664 | \f |
| 2665 | (defun save-buffer (&optional args) |
| 2666 | "Save current buffer in visited file if modified. Versions described below. |
| 2667 | By default, makes the previous version into a backup file |
| 2668 | if previously requested or if this is the first save. |
| 2669 | With 1 \\[universal-argument], marks this version |
| 2670 | to become a backup when the next save is done. |
| 2671 | With 2 \\[universal-argument]'s, |
| 2672 | unconditionally makes the previous version into a backup file. |
| 2673 | With 3 \\[universal-argument]'s, marks this version |
| 2674 | to become a backup when the next save is done, |
| 2675 | and unconditionally makes the previous version into a backup file. |
| 2676 | |
| 2677 | With argument of 0, never make the previous version into a backup file. |
| 2678 | |
| 2679 | If a file's name is FOO, the names of its numbered backup versions are |
| 2680 | FOO.~i~ for various integers i. A non-numbered backup file is called FOO~. |
| 2681 | Numeric backups (rather than FOO~) will be made if value of |
| 2682 | `version-control' is not the atom `never' and either there are already |
| 2683 | numeric versions of the file being backed up, or `version-control' is |
| 2684 | non-nil. |
| 2685 | We don't want excessive versions piling up, so there are variables |
| 2686 | `kept-old-versions', which tells Emacs how many oldest versions to keep, |
| 2687 | and `kept-new-versions', which tells how many newest versions to keep. |
| 2688 | Defaults are 2 old versions and 2 new. |
| 2689 | `dired-kept-versions' controls dired's clean-directory (.) command. |
| 2690 | If `delete-old-versions' is nil, system will query user |
| 2691 | before trimming versions. Otherwise it does it silently. |
| 2692 | |
| 2693 | If `vc-make-backup-files' is nil, which is the default, |
| 2694 | no backup files are made for files managed by version control. |
| 2695 | (This is because the version control system itself records previous versions.) |
| 2696 | |
| 2697 | See the subroutine `basic-save-buffer' for more information." |
| 2698 | (interactive "p") |
| 2699 | (let ((modp (buffer-modified-p)) |
| 2700 | (large (> (buffer-size) 50000)) |
| 2701 | (make-backup-files (or (and make-backup-files (not (eq args 0))) |
| 2702 | (memq args '(16 64))))) |
| 2703 | (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) |
| 2704 | (if (and modp large (buffer-file-name)) |
| 2705 | (message "Saving file %s..." (buffer-file-name))) |
| 2706 | (basic-save-buffer) |
| 2707 | (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) |
| 2708 | |
| 2709 | (defun delete-auto-save-file-if-necessary (&optional force) |
| 2710 | "Delete auto-save file for current buffer if `delete-auto-save-files' is t. |
| 2711 | Normally delete only if the file was written by this Emacs since |
| 2712 | the last real save, but optional arg FORCE non-nil means delete anyway." |
| 2713 | (and buffer-auto-save-file-name delete-auto-save-files |
| 2714 | (not (string= buffer-file-name buffer-auto-save-file-name)) |
| 2715 | (or force (recent-auto-save-p)) |
| 2716 | (progn |
| 2717 | (condition-case () |
| 2718 | (delete-file buffer-auto-save-file-name) |
| 2719 | (file-error nil)) |
| 2720 | (set-buffer-auto-saved)))) |
| 2721 | |
| 2722 | (defvar auto-save-hook nil |
| 2723 | "Normal hook run just before auto-saving.") |
| 2724 | |
| 2725 | (defcustom after-save-hook nil |
| 2726 | "Normal hook that is run after a buffer is saved to its file." |
| 2727 | :options '(executable-make-buffer-file-executable-if-script-p) |
| 2728 | :type 'hook |
| 2729 | :group 'files) |
| 2730 | |
| 2731 | (defvar save-buffer-coding-system nil |
| 2732 | "If non-nil, use this coding system for saving the buffer. |
| 2733 | More precisely, use this coding system in place of the |
| 2734 | value of `buffer-file-coding-system', when saving the buffer. |
| 2735 | Calling `write-region' for any purpose other than saving the buffer |
| 2736 | will still use `buffer-file-coding-system'; this variable has no effect |
| 2737 | in such cases.") |
| 2738 | |
| 2739 | (make-variable-buffer-local 'save-buffer-coding-system) |
| 2740 | (put 'save-buffer-coding-system 'permanent-local t) |
| 2741 | |
| 2742 | (defun basic-save-buffer () |
| 2743 | "Save the current buffer in its visited file, if it has been modified. |
| 2744 | The hooks `write-contents-hooks', `local-write-file-hooks' and |
| 2745 | `write-file-hooks' get a chance to do the job of saving; if they do not, |
| 2746 | then the buffer is saved in the visited file file in the usual way. |
| 2747 | After saving the buffer, this function runs `after-save-hook'." |
| 2748 | (interactive) |
| 2749 | (save-current-buffer |
| 2750 | ;; In an indirect buffer, save its base buffer instead. |
| 2751 | (if (buffer-base-buffer) |
| 2752 | (set-buffer (buffer-base-buffer))) |
| 2753 | (if (buffer-modified-p) |
| 2754 | (let ((recent-save (recent-auto-save-p)) |
| 2755 | setmodes tempsetmodes) |
| 2756 | ;; On VMS, rename file and buffer to get rid of version number. |
| 2757 | (if (and (eq system-type 'vax-vms) |
| 2758 | (not (string= buffer-file-name |
| 2759 | (file-name-sans-versions buffer-file-name)))) |
| 2760 | (let (buffer-new-name) |
| 2761 | ;; Strip VMS version number before save. |
| 2762 | (setq buffer-file-name |
| 2763 | (file-name-sans-versions buffer-file-name)) |
| 2764 | ;; Construct a (unique) buffer name to correspond. |
| 2765 | (let ((buf (create-file-buffer (downcase buffer-file-name)))) |
| 2766 | (setq buffer-new-name (buffer-name buf)) |
| 2767 | (kill-buffer buf)) |
| 2768 | (rename-buffer buffer-new-name))) |
| 2769 | ;; If buffer has no file name, ask user for one. |
| 2770 | (or buffer-file-name |
| 2771 | (let ((filename |
| 2772 | (expand-file-name |
| 2773 | (read-file-name "File to save in: ") nil))) |
| 2774 | (and (file-exists-p filename) |
| 2775 | (or (y-or-n-p (format "File `%s' exists; overwrite? " |
| 2776 | filename)) |
| 2777 | (error "Canceled"))) |
| 2778 | (set-visited-file-name filename))) |
| 2779 | (or (verify-visited-file-modtime (current-buffer)) |
| 2780 | (not (file-exists-p buffer-file-name)) |
| 2781 | (yes-or-no-p |
| 2782 | (format "%s has changed since visited or saved. Save anyway? " |
| 2783 | (file-name-nondirectory buffer-file-name))) |
| 2784 | (error "Save not confirmed")) |
| 2785 | (save-restriction |
| 2786 | (widen) |
| 2787 | (save-excursion |
| 2788 | (and (> (point-max) 1) |
| 2789 | (not find-file-literally) |
| 2790 | (/= (char-after (1- (point-max))) ?\n) |
| 2791 | (not (and (eq selective-display t) |
| 2792 | (= (char-after (1- (point-max))) ?\r))) |
| 2793 | (or (eq require-final-newline t) |
| 2794 | (and require-final-newline |
| 2795 | (y-or-n-p |
| 2796 | (format "Buffer %s does not end in newline. Add one? " |
| 2797 | (buffer-name))))) |
| 2798 | (save-excursion |
| 2799 | (goto-char (point-max)) |
| 2800 | (insert ?\n)))) |
| 2801 | ;; Support VC version backups. |
| 2802 | (vc-before-save) |
| 2803 | (or (run-hook-with-args-until-success 'write-contents-hooks) |
| 2804 | (run-hook-with-args-until-success 'local-write-file-hooks) |
| 2805 | (run-hook-with-args-until-success 'write-file-hooks) |
| 2806 | ;; If a hook returned t, file is already "written". |
| 2807 | ;; Otherwise, write it the usual way now. |
| 2808 | (setq setmodes (basic-save-buffer-1))) |
| 2809 | ;; Now we have saved the current buffer. Let's make sure |
| 2810 | ;; that buffer-file-coding-system is fixed to what |
| 2811 | ;; actually used for saving by binding it locally. |
| 2812 | (if save-buffer-coding-system |
| 2813 | (setq save-buffer-coding-system last-coding-system-used) |
| 2814 | (setq buffer-file-coding-system last-coding-system-used)) |
| 2815 | (setq buffer-file-number |
| 2816 | (nthcdr 10 (file-attributes buffer-file-name))) |
| 2817 | (if setmodes |
| 2818 | (condition-case () |
| 2819 | (set-file-modes buffer-file-name setmodes) |
| 2820 | (error nil)))) |
| 2821 | ;; If the auto-save file was recent before this command, |
| 2822 | ;; delete it now. |
| 2823 | (delete-auto-save-file-if-necessary recent-save) |
| 2824 | ;; Support VC `implicit' locking. |
| 2825 | (vc-after-save) |
| 2826 | (run-hooks 'after-save-hook)) |
| 2827 | (message "(No changes need to be saved)")))) |
| 2828 | |
| 2829 | ;; This does the "real job" of writing a buffer into its visited file |
| 2830 | ;; and making a backup file. This is what is normally done |
| 2831 | ;; but inhibited if one of write-file-hooks returns non-nil. |
| 2832 | ;; It returns a value to store in setmodes. |
| 2833 | (defun basic-save-buffer-1 () |
| 2834 | (if save-buffer-coding-system |
| 2835 | (let ((coding-system-for-write save-buffer-coding-system)) |
| 2836 | (basic-save-buffer-2)) |
| 2837 | (basic-save-buffer-2))) |
| 2838 | |
| 2839 | (defun basic-save-buffer-2 () |
| 2840 | (let (tempsetmodes setmodes) |
| 2841 | (if (not (file-writable-p buffer-file-name)) |
| 2842 | (let ((dir (file-name-directory buffer-file-name))) |
| 2843 | (if (not (file-directory-p dir)) |
| 2844 | (if (file-exists-p dir) |
| 2845 | (error "%s is not a directory" dir) |
| 2846 | (error "%s: no such directory" buffer-file-name)) |
| 2847 | (if (not (file-exists-p buffer-file-name)) |
| 2848 | (error "Directory %s write-protected" dir) |
| 2849 | (if (yes-or-no-p |
| 2850 | (format "File %s is write-protected; try to save anyway? " |
| 2851 | (file-name-nondirectory |
| 2852 | buffer-file-name))) |
| 2853 | (setq tempsetmodes t) |
| 2854 | (error "Attempt to save to a file which you aren't allowed to write")))))) |
| 2855 | (or buffer-backed-up |
| 2856 | (setq setmodes (backup-buffer))) |
| 2857 | (let ((dir (file-name-directory buffer-file-name))) |
| 2858 | (if (and file-precious-flag |
| 2859 | (file-writable-p dir)) |
| 2860 | ;; If file is precious, write temp name, then rename it. |
| 2861 | ;; This requires write access to the containing dir, |
| 2862 | ;; which is why we don't try it if we don't have that access. |
| 2863 | (let ((realname buffer-file-name) |
| 2864 | tempname temp nogood i succeed |
| 2865 | (old-modtime (visited-file-modtime))) |
| 2866 | (setq i 0) |
| 2867 | (setq nogood t) |
| 2868 | ;; Find the temporary name to write under. |
| 2869 | (while nogood |
| 2870 | (setq tempname (format |
| 2871 | (if (and (eq system-type 'ms-dos) |
| 2872 | (not (msdos-long-file-names))) |
| 2873 | "%s#%d.tm#" ; MSDOS limits files to 8+3 |
| 2874 | (if (memq system-type '(vax-vms axp-vms)) |
| 2875 | "%s$tmp$%d" |
| 2876 | "%s#tmp#%d")) |
| 2877 | dir i)) |
| 2878 | (setq nogood (file-exists-p tempname)) |
| 2879 | (setq i (1+ i))) |
| 2880 | (unwind-protect |
| 2881 | (progn (clear-visited-file-modtime) |
| 2882 | (write-region (point-min) (point-max) |
| 2883 | tempname nil realname |
| 2884 | buffer-file-truename) |
| 2885 | (setq succeed t)) |
| 2886 | ;; If writing the temp file fails, |
| 2887 | ;; delete the temp file. |
| 2888 | (or succeed |
| 2889 | (progn |
| 2890 | (condition-case nil |
| 2891 | (delete-file tempname) |
| 2892 | (file-error nil)) |
| 2893 | (set-visited-file-modtime old-modtime)))) |
| 2894 | ;; Since we have created an entirely new file |
| 2895 | ;; and renamed it, make sure it gets the |
| 2896 | ;; right permission bits set. |
| 2897 | (setq setmodes (file-modes buffer-file-name)) |
| 2898 | ;; We succeeded in writing the temp file, |
| 2899 | ;; so rename it. |
| 2900 | (rename-file tempname buffer-file-name t)) |
| 2901 | ;; If file not writable, see if we can make it writable |
| 2902 | ;; temporarily while we write it. |
| 2903 | ;; But no need to do so if we have just backed it up |
| 2904 | ;; (setmodes is set) because that says we're superseding. |
| 2905 | (cond ((and tempsetmodes (not setmodes)) |
| 2906 | ;; Change the mode back, after writing. |
| 2907 | (setq setmodes (file-modes buffer-file-name)) |
| 2908 | (set-file-modes buffer-file-name (logior setmodes 128)))) |
| 2909 | (write-region (point-min) (point-max) |
| 2910 | buffer-file-name nil t buffer-file-truename))) |
| 2911 | setmodes)) |
| 2912 | |
| 2913 | (defun save-some-buffers (&optional arg pred) |
| 2914 | "Save some modified file-visiting buffers. Asks user about each one. |
| 2915 | Optional argument (the prefix) non-nil means save all with no questions. |
| 2916 | Optional second argument PRED determines which buffers are considered: |
| 2917 | If PRED is nil, all the file-visiting buffers are considered. |
| 2918 | If PRED is t, then certain non-file buffers will also be considered. |
| 2919 | If PRED is a zero-argument function, it indicates for each buffer whether |
| 2920 | to consider it or not when called with that buffer current." |
| 2921 | (interactive "P") |
| 2922 | (save-window-excursion |
| 2923 | (let* ((queried nil) |
| 2924 | (files-done |
| 2925 | (map-y-or-n-p |
| 2926 | (function |
| 2927 | (lambda (buffer) |
| 2928 | (and (buffer-modified-p buffer) |
| 2929 | (not (buffer-base-buffer buffer)) |
| 2930 | (or |
| 2931 | (buffer-file-name buffer) |
| 2932 | (and pred |
| 2933 | (progn |
| 2934 | (set-buffer buffer) |
| 2935 | (and buffer-offer-save (> (buffer-size) 0))))) |
| 2936 | (or (not (functionp pred)) |
| 2937 | (with-current-buffer buffer (funcall pred))) |
| 2938 | (if arg |
| 2939 | t |
| 2940 | (setq queried t) |
| 2941 | (if (buffer-file-name buffer) |
| 2942 | (format "Save file %s? " |
| 2943 | (buffer-file-name buffer)) |
| 2944 | (format "Save buffer %s? " |
| 2945 | (buffer-name buffer))))))) |
| 2946 | (function |
| 2947 | (lambda (buffer) |
| 2948 | (set-buffer buffer) |
| 2949 | (save-buffer))) |
| 2950 | (buffer-list) |
| 2951 | '("buffer" "buffers" "save") |
| 2952 | (list (list ?\C-r (lambda (buf) |
| 2953 | (view-buffer buf |
| 2954 | (function |
| 2955 | (lambda (ignore) |
| 2956 | (exit-recursive-edit)))) |
| 2957 | (recursive-edit) |
| 2958 | ;; Return nil to ask about BUF again. |
| 2959 | nil) |
| 2960 | "display the current buffer")))) |
| 2961 | (abbrevs-done |
| 2962 | (and save-abbrevs abbrevs-changed |
| 2963 | (progn |
| 2964 | (if (or arg |
| 2965 | (eq save-abbrevs 'silently) |
| 2966 | (y-or-n-p (format "Save abbrevs in %s? " |
| 2967 | abbrev-file-name))) |
| 2968 | (write-abbrev-file nil)) |
| 2969 | ;; Don't keep bothering user if he says no. |
| 2970 | (setq abbrevs-changed nil) |
| 2971 | t)))) |
| 2972 | (or queried (> files-done 0) abbrevs-done |
| 2973 | (message "(No files need saving)"))))) |
| 2974 | \f |
| 2975 | (defun not-modified (&optional arg) |
| 2976 | "Mark current buffer as unmodified, not needing to be saved. |
| 2977 | With prefix arg, mark buffer as modified, so \\[save-buffer] will save. |
| 2978 | |
| 2979 | It is not a good idea to use this function in Lisp programs, because it |
| 2980 | prints a message in the minibuffer. Instead, use `set-buffer-modified-p'." |
| 2981 | (interactive "P") |
| 2982 | (message (if arg "Modification-flag set" |
| 2983 | "Modification-flag cleared")) |
| 2984 | (set-buffer-modified-p arg)) |
| 2985 | |
| 2986 | (defun toggle-read-only (&optional arg) |
| 2987 | "Change whether this buffer is visiting its file read-only. |
| 2988 | With arg, set read-only iff arg is positive. |
| 2989 | If visiting file read-only and `view-read-only' is non-nil, enter view mode." |
| 2990 | (interactive "P") |
| 2991 | (cond |
| 2992 | ((and arg (if (> (prefix-numeric-value arg) 0) buffer-read-only |
| 2993 | (not buffer-read-only))) ; If buffer-read-only is set correctly, |
| 2994 | nil) ; do nothing. |
| 2995 | ;; Toggle. |
| 2996 | ((and buffer-read-only view-mode) |
| 2997 | (View-exit-and-edit) |
| 2998 | (make-local-variable 'view-read-only) |
| 2999 | (setq view-read-only t)) ; Must leave view mode. |
| 3000 | ((and (not buffer-read-only) view-read-only |
| 3001 | (not (eq (get major-mode 'mode-class) 'special))) |
| 3002 | (view-mode-enter)) |
| 3003 | (t (setq buffer-read-only (not buffer-read-only)) |
| 3004 | (force-mode-line-update)))) |
| 3005 | |
| 3006 | (defun insert-file (filename) |
| 3007 | "Insert contents of file FILENAME into buffer after point. |
| 3008 | Set mark after the inserted text. |
| 3009 | |
| 3010 | This function is meant for the user to run interactively. |
| 3011 | Don't call it from programs! Use `insert-file-contents' instead. |
| 3012 | \(Its calling sequence is different; see its documentation)." |
| 3013 | (interactive "*fInsert file: ") |
| 3014 | (if (file-directory-p filename) |
| 3015 | (signal 'file-error (list "Opening input file" "file is a directory" |
| 3016 | filename))) |
| 3017 | (let ((tem (insert-file-contents filename))) |
| 3018 | (push-mark (+ (point) (car (cdr tem)))))) |
| 3019 | |
| 3020 | (defun append-to-file (start end filename) |
| 3021 | "Append the contents of the region to the end of file FILENAME. |
| 3022 | When called from a function, expects three arguments, |
| 3023 | START, END and FILENAME. START and END are buffer positions |
| 3024 | saying what text to write." |
| 3025 | (interactive "r\nFAppend to file: ") |
| 3026 | (write-region start end filename t)) |
| 3027 | |
| 3028 | (defun file-newest-backup (filename) |
| 3029 | "Return most recent backup file for FILENAME or nil if no backups exist." |
| 3030 | ;; `make-backup-file-name' will get us the right directory for |
| 3031 | ;; ordinary or numeric backups. It might create a directory for |
| 3032 | ;; backups as a side-effect, according to `backup-directory-alist'. |
| 3033 | (let* ((filename (file-name-sans-versions |
| 3034 | (make-backup-file-name filename))) |
| 3035 | (file (file-name-nondirectory filename)) |
| 3036 | (dir (file-name-directory filename)) |
| 3037 | (comp (file-name-all-completions file dir)) |
| 3038 | (newest nil) |
| 3039 | tem) |
| 3040 | (while comp |
| 3041 | (setq tem (pop comp)) |
| 3042 | (cond ((and (backup-file-name-p tem) |
| 3043 | (string= (file-name-sans-versions tem) file)) |
| 3044 | (setq tem (concat dir tem)) |
| 3045 | (if (or (null newest) |
| 3046 | (file-newer-than-file-p tem newest)) |
| 3047 | (setq newest tem))))) |
| 3048 | newest)) |
| 3049 | |
| 3050 | (defun rename-uniquely () |
| 3051 | "Rename current buffer to a similar name not already taken. |
| 3052 | This function is useful for creating multiple shell process buffers |
| 3053 | or multiple mail buffers, etc." |
| 3054 | (interactive) |
| 3055 | (save-match-data |
| 3056 | (let ((base-name (buffer-name))) |
| 3057 | (and (string-match "<[0-9]+>\\'" base-name) |
| 3058 | (not (and buffer-file-name |
| 3059 | (string= base-name |
| 3060 | (file-name-nondirectory buffer-file-name)))) |
| 3061 | ;; If the existing buffer name has a <NNN>, |
| 3062 | ;; which isn't part of the file name (if any), |
| 3063 | ;; then get rid of that. |
| 3064 | (setq base-name (substring base-name 0 (match-beginning 0)))) |
| 3065 | (rename-buffer (generate-new-buffer-name base-name)) |
| 3066 | (force-mode-line-update)))) |
| 3067 | |
| 3068 | (defun make-directory (dir &optional parents) |
| 3069 | "Create the directory DIR and any nonexistent parent dirs. |
| 3070 | Interactively, the default choice of directory to create |
| 3071 | is the current default directory for file names. |
| 3072 | That is useful when you have visited a file in a nonexistent directory. |
| 3073 | |
| 3074 | Noninteractively, the second (optional) argument PARENTS says whether |
| 3075 | to create parent directories if they don't exist." |
| 3076 | (interactive |
| 3077 | (list (read-file-name "Make directory: " default-directory default-directory |
| 3078 | nil nil) |
| 3079 | t)) |
| 3080 | (let ((handler (find-file-name-handler dir 'make-directory))) |
| 3081 | (if handler |
| 3082 | (funcall handler 'make-directory dir parents) |
| 3083 | (if (not parents) |
| 3084 | (make-directory-internal dir) |
| 3085 | (let ((dir (directory-file-name (expand-file-name dir))) |
| 3086 | create-list) |
| 3087 | (while (not (file-exists-p dir)) |
| 3088 | (setq create-list (cons dir create-list) |
| 3089 | dir (directory-file-name (file-name-directory dir)))) |
| 3090 | (while create-list |
| 3091 | (make-directory-internal (car create-list)) |
| 3092 | (setq create-list (cdr create-list)))))))) |
| 3093 | \f |
| 3094 | (put 'revert-buffer-function 'permanent-local t) |
| 3095 | (defvar revert-buffer-function nil |
| 3096 | "Function to use to revert this buffer, or nil to do the default. |
| 3097 | The function receives two arguments IGNORE-AUTO and NOCONFIRM, |
| 3098 | which are the arguments that `revert-buffer' received.") |
| 3099 | |
| 3100 | (put 'revert-buffer-insert-file-contents-function 'permanent-local t) |
| 3101 | (defvar revert-buffer-insert-file-contents-function nil |
| 3102 | "Function to use to insert contents when reverting this buffer. |
| 3103 | Gets two args, first the nominal file name to use, |
| 3104 | and second, t if reading the auto-save file. |
| 3105 | |
| 3106 | The function you specify is responsible for updating (or preserving) point.") |
| 3107 | |
| 3108 | (defvar before-revert-hook nil |
| 3109 | "Normal hook for `revert-buffer' to run before reverting. |
| 3110 | If `revert-buffer-function' is used to override the normal revert |
| 3111 | mechanism, this hook is not used.") |
| 3112 | |
| 3113 | (defvar after-revert-hook nil |
| 3114 | "Normal hook for `revert-buffer' to run after reverting. |
| 3115 | Note that the hook value that it runs is the value that was in effect |
| 3116 | before reverting; that makes a difference if you have buffer-local |
| 3117 | hook functions. |
| 3118 | |
| 3119 | If `revert-buffer-function' is used to override the normal revert |
| 3120 | mechanism, this hook is not used.") |
| 3121 | |
| 3122 | (defvar revert-buffer-internal-hook) |
| 3123 | |
| 3124 | (defun revert-buffer (&optional ignore-auto noconfirm preserve-modes) |
| 3125 | "Replace current buffer text with the text of the visited file on disk. |
| 3126 | This undoes all changes since the file was visited or saved. |
| 3127 | With a prefix argument, offer to revert from latest auto-save file, if |
| 3128 | that is more recent than the visited file. |
| 3129 | |
| 3130 | This command also works for special buffers that contain text which |
| 3131 | doesn't come from a file, but reflects some other data base instead: |
| 3132 | for example, Dired buffers and buffer-list buffers. In these cases, |
| 3133 | it reconstructs the buffer contents from the appropriate data base. |
| 3134 | |
| 3135 | When called from Lisp, the first argument is IGNORE-AUTO; only offer |
| 3136 | to revert from the auto-save file when this is nil. Note that the |
| 3137 | sense of this argument is the reverse of the prefix argument, for the |
| 3138 | sake of backward compatibility. IGNORE-AUTO is optional, defaulting |
| 3139 | to nil. |
| 3140 | |
| 3141 | Optional second argument NOCONFIRM means don't ask for confirmation at |
| 3142 | all. (The local variable `revert-without-query', if non-nil, prevents |
| 3143 | confirmation.) |
| 3144 | |
| 3145 | Optional third argument PRESERVE-MODES non-nil means don't alter |
| 3146 | the files modes. Normally we reinitialize them using `normal-mode'. |
| 3147 | |
| 3148 | If the value of `revert-buffer-function' is non-nil, it is called to |
| 3149 | do all the work for this command. Otherwise, the hooks |
| 3150 | `before-revert-hook' and `after-revert-hook' are run at the beginning |
| 3151 | and the end, and if `revert-buffer-insert-file-contents-function' is |
| 3152 | non-nil, it is called instead of rereading visited file contents." |
| 3153 | |
| 3154 | ;; I admit it's odd to reverse the sense of the prefix argument, but |
| 3155 | ;; there is a lot of code out there which assumes that the first |
| 3156 | ;; argument should be t to avoid consulting the auto-save file, and |
| 3157 | ;; there's no straightforward way to encourage authors to notice a |
| 3158 | ;; reversal of the argument sense. So I'm just changing the user |
| 3159 | ;; interface, but leaving the programmatic interface the same. |
| 3160 | (interactive (list (not current-prefix-arg))) |
| 3161 | (if revert-buffer-function |
| 3162 | (funcall revert-buffer-function ignore-auto noconfirm) |
| 3163 | (let* ((auto-save-p (and (not ignore-auto) |
| 3164 | (recent-auto-save-p) |
| 3165 | buffer-auto-save-file-name |
| 3166 | (file-readable-p buffer-auto-save-file-name) |
| 3167 | (y-or-n-p |
| 3168 | "Buffer has been auto-saved recently. Revert from auto-save file? "))) |
| 3169 | (file-name (if auto-save-p |
| 3170 | buffer-auto-save-file-name |
| 3171 | buffer-file-name))) |
| 3172 | (cond ((null file-name) |
| 3173 | (error "Buffer does not seem to be associated with any file")) |
| 3174 | ((or noconfirm |
| 3175 | (and (not (buffer-modified-p)) |
| 3176 | (let ((tail revert-without-query) |
| 3177 | (found nil)) |
| 3178 | (while tail |
| 3179 | (if (string-match (car tail) file-name) |
| 3180 | (setq found t)) |
| 3181 | (setq tail (cdr tail))) |
| 3182 | found)) |
| 3183 | (yes-or-no-p (format "Revert buffer from file %s? " |
| 3184 | file-name))) |
| 3185 | (run-hooks 'before-revert-hook) |
| 3186 | ;; If file was backed up but has changed since, |
| 3187 | ;; we shd make another backup. |
| 3188 | (and (not auto-save-p) |
| 3189 | (not (verify-visited-file-modtime (current-buffer))) |
| 3190 | (setq buffer-backed-up nil)) |
| 3191 | ;; Get rid of all undo records for this buffer. |
| 3192 | (or (eq buffer-undo-list t) |
| 3193 | (setq buffer-undo-list nil)) |
| 3194 | ;; Effectively copy the after-revert-hook status, |
| 3195 | ;; since after-find-file will clobber it. |
| 3196 | (let ((global-hook (default-value 'after-revert-hook)) |
| 3197 | (local-hook-p (local-variable-p 'after-revert-hook)) |
| 3198 | (local-hook (and (local-variable-p 'after-revert-hook) |
| 3199 | after-revert-hook))) |
| 3200 | (let (buffer-read-only |
| 3201 | ;; Don't make undo records for the reversion. |
| 3202 | (buffer-undo-list t)) |
| 3203 | (if revert-buffer-insert-file-contents-function |
| 3204 | (funcall revert-buffer-insert-file-contents-function |
| 3205 | file-name auto-save-p) |
| 3206 | (if (not (file-exists-p file-name)) |
| 3207 | (error "File %s no longer exists!" file-name)) |
| 3208 | ;; Bind buffer-file-name to nil |
| 3209 | ;; so that we don't try to lock the file. |
| 3210 | (let ((buffer-file-name nil)) |
| 3211 | (or auto-save-p |
| 3212 | (unlock-buffer))) |
| 3213 | (widen) |
| 3214 | (let ((coding-system-for-read |
| 3215 | ;; Auto-saved file shoule be read without |
| 3216 | ;; any code conversion. |
| 3217 | (if auto-save-p 'emacs-mule-unix |
| 3218 | coding-system-for-read))) |
| 3219 | ;; Note that this preserves point in an intelligent way. |
| 3220 | (insert-file-contents file-name (not auto-save-p) |
| 3221 | nil nil t)))) |
| 3222 | ;; Recompute the truename in case changes in symlinks |
| 3223 | ;; have changed the truename. |
| 3224 | (setq buffer-file-truename |
| 3225 | (abbreviate-file-name (file-truename buffer-file-name))) |
| 3226 | (after-find-file nil nil t t preserve-modes) |
| 3227 | ;; Run after-revert-hook as it was before we reverted. |
| 3228 | (setq-default revert-buffer-internal-hook global-hook) |
| 3229 | (if local-hook-p |
| 3230 | (progn |
| 3231 | (make-local-variable 'revert-buffer-internal-hook) |
| 3232 | (setq revert-buffer-internal-hook local-hook)) |
| 3233 | (kill-local-variable 'revert-buffer-internal-hook)) |
| 3234 | (run-hooks 'revert-buffer-internal-hook)) |
| 3235 | t))))) |
| 3236 | |
| 3237 | (defun recover-file (file) |
| 3238 | "Visit file FILE, but get contents from its last auto-save file." |
| 3239 | ;; Actually putting the file name in the minibuffer should be used |
| 3240 | ;; only rarely. |
| 3241 | ;; Not just because users often use the default. |
| 3242 | (interactive "FRecover file: ") |
| 3243 | (setq file (expand-file-name file)) |
| 3244 | (if (auto-save-file-name-p (file-name-nondirectory file)) |
| 3245 | (error "%s is an auto-save file" file)) |
| 3246 | (let ((file-name (let ((buffer-file-name file)) |
| 3247 | (make-auto-save-file-name)))) |
| 3248 | (cond ((if (file-exists-p file) |
| 3249 | (not (file-newer-than-file-p file-name file)) |
| 3250 | (not (file-exists-p file-name))) |
| 3251 | (error "Auto-save file %s not current" file-name)) |
| 3252 | ((save-window-excursion |
| 3253 | (with-output-to-temp-buffer "*Directory*" |
| 3254 | (buffer-disable-undo standard-output) |
| 3255 | (save-excursion |
| 3256 | (let ((switches dired-listing-switches)) |
| 3257 | (if (file-symlink-p file) |
| 3258 | (setq switches (concat switches "L"))) |
| 3259 | (set-buffer standard-output) |
| 3260 | ;; Use insert-directory-safely, not insert-directory, |
| 3261 | ;; because these files might not exist. In particular, |
| 3262 | ;; FILE might not exist if the auto-save file was for |
| 3263 | ;; a buffer that didn't visit a file, such as "*mail*". |
| 3264 | ;; The code in v20.x called `ls' directly, so we need |
| 3265 | ;; to emulate what `ls' did in that case. |
| 3266 | (insert-directory-safely file switches) |
| 3267 | (insert-directory-safely file-name switches)))) |
| 3268 | (yes-or-no-p (format "Recover auto save file %s? " file-name))) |
| 3269 | (switch-to-buffer (find-file-noselect file t)) |
| 3270 | (let ((buffer-read-only nil) |
| 3271 | ;; Keep the current buffer-file-coding-system. |
| 3272 | (coding-system buffer-file-coding-system) |
| 3273 | ;; Auto-saved file shoule be read without any code conversion. |
| 3274 | (coding-system-for-read 'emacs-mule-unix)) |
| 3275 | (erase-buffer) |
| 3276 | (insert-file-contents file-name nil) |
| 3277 | (set-buffer-file-coding-system coding-system)) |
| 3278 | (after-find-file nil nil t)) |
| 3279 | (t (error "Recover-file cancelled"))))) |
| 3280 | |
| 3281 | (defun recover-session () |
| 3282 | "Recover auto save files from a previous Emacs session. |
| 3283 | This command first displays a Dired buffer showing you the |
| 3284 | previous sessions that you could recover from. |
| 3285 | To choose one, move point to the proper line and then type C-c C-c. |
| 3286 | Then you'll be asked about a number of files to recover." |
| 3287 | (interactive) |
| 3288 | (if (null auto-save-list-file-prefix) |
| 3289 | (error "You set `auto-save-list-file-prefix' to disable making session files")) |
| 3290 | (let ((dir (file-name-directory auto-save-list-file-prefix))) |
| 3291 | (unless (file-directory-p dir) |
| 3292 | (make-directory dir t))) |
| 3293 | (let ((ls-lisp-support-shell-wildcards t)) |
| 3294 | (dired (concat auto-save-list-file-prefix "*") |
| 3295 | (concat dired-listing-switches "t"))) |
| 3296 | (save-excursion |
| 3297 | (goto-char (point-min)) |
| 3298 | (or (looking-at " Move to the session you want to recover,") |
| 3299 | (let ((inhibit-read-only t)) |
| 3300 | ;; Each line starts with a space |
| 3301 | ;; so that Font Lock mode won't highlight the first character. |
| 3302 | (insert " Move to the session you want to recover,\n" |
| 3303 | " then type C-c C-c to select it.\n\n" |
| 3304 | " You can also delete some of these files;\n" |
| 3305 | " type d on a line to mark that file for deletion.\n\n")))) |
| 3306 | (use-local-map (nconc (make-sparse-keymap) (current-local-map))) |
| 3307 | (define-key (current-local-map) "\C-c\C-c" 'recover-session-finish)) |
| 3308 | |
| 3309 | (defun recover-session-finish () |
| 3310 | "Choose one saved session to recover auto-save files from. |
| 3311 | This command is used in the special Dired buffer created by |
| 3312 | \\[recover-session]." |
| 3313 | (interactive) |
| 3314 | ;; Get the name of the session file to recover from. |
| 3315 | (let ((file (dired-get-filename)) |
| 3316 | files |
| 3317 | (buffer (get-buffer-create " *recover*"))) |
| 3318 | (dired-unmark 1) |
| 3319 | (dired-do-flagged-delete t) |
| 3320 | (unwind-protect |
| 3321 | (save-excursion |
| 3322 | ;; Read in the auto-save-list file. |
| 3323 | (set-buffer buffer) |
| 3324 | (erase-buffer) |
| 3325 | (insert-file-contents file) |
| 3326 | ;; Loop thru the text of that file |
| 3327 | ;; and get out the names of the files to recover. |
| 3328 | (while (not (eobp)) |
| 3329 | (let (thisfile autofile) |
| 3330 | (if (eolp) |
| 3331 | ;; This is a pair of lines for a non-file-visiting buffer. |
| 3332 | ;; Get the auto-save file name and manufacture |
| 3333 | ;; a "visited file name" from that. |
| 3334 | (progn |
| 3335 | (forward-line 1) |
| 3336 | (setq autofile |
| 3337 | (buffer-substring-no-properties |
| 3338 | (point) |
| 3339 | (save-excursion |
| 3340 | (end-of-line) |
| 3341 | (point)))) |
| 3342 | (setq thisfile |
| 3343 | (expand-file-name |
| 3344 | (substring |
| 3345 | (file-name-nondirectory autofile) |
| 3346 | 1 -1) |
| 3347 | (file-name-directory autofile))) |
| 3348 | (forward-line 1)) |
| 3349 | ;; This pair of lines is a file-visiting |
| 3350 | ;; buffer. Use the visited file name. |
| 3351 | (progn |
| 3352 | (setq thisfile |
| 3353 | (buffer-substring-no-properties |
| 3354 | (point) (progn (end-of-line) (point)))) |
| 3355 | (forward-line 1) |
| 3356 | (setq autofile |
| 3357 | (buffer-substring-no-properties |
| 3358 | (point) (progn (end-of-line) (point)))) |
| 3359 | (forward-line 1))) |
| 3360 | ;; Ignore a file if its auto-save file does not exist now. |
| 3361 | (if (file-exists-p autofile) |
| 3362 | (setq files (cons thisfile files))))) |
| 3363 | (setq files (nreverse files)) |
| 3364 | ;; The file contains a pair of line for each auto-saved buffer. |
| 3365 | ;; The first line of the pair contains the visited file name |
| 3366 | ;; or is empty if the buffer was not visiting a file. |
| 3367 | ;; The second line is the auto-save file name. |
| 3368 | (if files |
| 3369 | (map-y-or-n-p "Recover %s? " |
| 3370 | (lambda (file) |
| 3371 | (condition-case nil |
| 3372 | (save-excursion (recover-file file)) |
| 3373 | (error |
| 3374 | "Failed to recover `%s'" file))) |
| 3375 | files |
| 3376 | '("file" "files" "recover")) |
| 3377 | (message "No files can be recovered from this session now"))) |
| 3378 | (kill-buffer buffer)))) |
| 3379 | |
| 3380 | (defun kill-some-buffers (&optional list) |
| 3381 | "For each buffer in LIST, ask whether to kill it. |
| 3382 | LIST defaults to all existing live buffers." |
| 3383 | (interactive) |
| 3384 | (if (null list) |
| 3385 | (setq list (buffer-list))) |
| 3386 | (while list |
| 3387 | (let* ((buffer (car list)) |
| 3388 | (name (buffer-name buffer))) |
| 3389 | (and (not (string-equal name "")) |
| 3390 | (/= (aref name 0) ? ) |
| 3391 | (yes-or-no-p |
| 3392 | (format "Buffer %s %s. Kill? " |
| 3393 | name |
| 3394 | (if (buffer-modified-p buffer) |
| 3395 | "HAS BEEN EDITED" "is unmodified"))) |
| 3396 | (kill-buffer buffer))) |
| 3397 | (setq list (cdr list)))) |
| 3398 | \f |
| 3399 | (defun auto-save-mode (arg) |
| 3400 | "Toggle auto-saving of contents of current buffer. |
| 3401 | With prefix argument ARG, turn auto-saving on if positive, else off." |
| 3402 | (interactive "P") |
| 3403 | (setq buffer-auto-save-file-name |
| 3404 | (and (if (null arg) |
| 3405 | (or (not buffer-auto-save-file-name) |
| 3406 | ;; If auto-save is off because buffer has shrunk, |
| 3407 | ;; then toggling should turn it on. |
| 3408 | (< buffer-saved-size 0)) |
| 3409 | (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) |
| 3410 | (if (and buffer-file-name auto-save-visited-file-name |
| 3411 | (not buffer-read-only)) |
| 3412 | buffer-file-name |
| 3413 | (make-auto-save-file-name)))) |
| 3414 | ;; If -1 was stored here, to temporarily turn off saving, |
| 3415 | ;; turn it back on. |
| 3416 | (and (< buffer-saved-size 0) |
| 3417 | (setq buffer-saved-size 0)) |
| 3418 | (if (interactive-p) |
| 3419 | (message "Auto-save %s (in this buffer)" |
| 3420 | (if buffer-auto-save-file-name "on" "off"))) |
| 3421 | buffer-auto-save-file-name) |
| 3422 | |
| 3423 | (defun rename-auto-save-file () |
| 3424 | "Adjust current buffer's auto save file name for current conditions. |
| 3425 | Also rename any existing auto save file, if it was made in this session." |
| 3426 | (let ((osave buffer-auto-save-file-name)) |
| 3427 | (setq buffer-auto-save-file-name |
| 3428 | (make-auto-save-file-name)) |
| 3429 | (if (and osave buffer-auto-save-file-name |
| 3430 | (not (string= buffer-auto-save-file-name buffer-file-name)) |
| 3431 | (not (string= buffer-auto-save-file-name osave)) |
| 3432 | (file-exists-p osave) |
| 3433 | (recent-auto-save-p)) |
| 3434 | (rename-file osave buffer-auto-save-file-name t)))) |
| 3435 | |
| 3436 | (defun make-auto-save-file-name () |
| 3437 | "Return file name to use for auto-saves of current buffer. |
| 3438 | Does not consider `auto-save-visited-file-name' as that variable is checked |
| 3439 | before calling this function. You can redefine this for customization. |
| 3440 | See also `auto-save-file-name-p'." |
| 3441 | (if buffer-file-name |
| 3442 | (let ((list auto-save-file-name-transforms) |
| 3443 | (filename buffer-file-name) |
| 3444 | result uniq) |
| 3445 | ;; Apply user-specified translations |
| 3446 | ;; to the file name. |
| 3447 | (while (and list (not result)) |
| 3448 | (if (string-match (car (car list)) filename) |
| 3449 | (setq result (replace-match (cadr (car list)) t nil |
| 3450 | filename) |
| 3451 | uniq (car (cddr (car list))))) |
| 3452 | (setq list (cdr list))) |
| 3453 | (if result |
| 3454 | (if uniq |
| 3455 | (setq filename (concat |
| 3456 | (file-name-directory result) |
| 3457 | (subst-char-in-string |
| 3458 | directory-sep-char ?! |
| 3459 | (replace-regexp-in-string "!" "!!" |
| 3460 | filename)))) |
| 3461 | (setq filename result))) |
| 3462 | (setq result |
| 3463 | (if (and (eq system-type 'ms-dos) |
| 3464 | (not (msdos-long-file-names))) |
| 3465 | ;; We truncate the file name to DOS 8+3 limits |
| 3466 | ;; before doing anything else, because the regexp |
| 3467 | ;; passed to string-match below cannot handle |
| 3468 | ;; extensions longer than 3 characters, multiple |
| 3469 | ;; dots, and other atrocities. |
| 3470 | (let ((fn (dos-8+3-filename |
| 3471 | (file-name-nondirectory buffer-file-name)))) |
| 3472 | (string-match |
| 3473 | "\\`\\([^.]+\\)\\(\\.\\(..?\\)?.?\\|\\)\\'" |
| 3474 | fn) |
| 3475 | (concat (file-name-directory buffer-file-name) |
| 3476 | "#" (match-string 1 fn) |
| 3477 | "." (match-string 3 fn) "#")) |
| 3478 | (concat (file-name-directory filename) |
| 3479 | "#" |
| 3480 | (file-name-nondirectory filename) |
| 3481 | "#"))) |
| 3482 | ;; Make sure auto-save file names don't contain characters |
| 3483 | ;; invalid for the underlying filesystem. |
| 3484 | (if (and (memq system-type '(ms-dos windows-nt)) |
| 3485 | ;; Don't modify remote (ange-ftp) filenames |
| 3486 | (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" result))) |
| 3487 | (convert-standard-filename result) |
| 3488 | result)) |
| 3489 | |
| 3490 | ;; Deal with buffers that don't have any associated files. (Mail |
| 3491 | ;; mode tends to create a good number of these.) |
| 3492 | |
| 3493 | (let ((buffer-name (buffer-name)) |
| 3494 | (limit 0) |
| 3495 | filename) |
| 3496 | ;; Eliminate all slashes and backslashes by |
| 3497 | ;; replacing them with sequences that start with %. |
| 3498 | ;; Quote % also, to keep distinct names distinct. |
| 3499 | (while (string-match "[/\\%]" buffer-name limit) |
| 3500 | (let* ((character (aref buffer-name (match-beginning 0))) |
| 3501 | (replacement |
| 3502 | (cond ((eq character ?%) "%%") |
| 3503 | ((eq character ?/) "%+") |
| 3504 | ((eq character ?\\) "%-")))) |
| 3505 | (setq buffer-name (replace-match replacement t t buffer-name)) |
| 3506 | (setq limit (1+ (match-end 0))))) |
| 3507 | ;; Generate the file name. |
| 3508 | (setq file-name |
| 3509 | (make-temp-file |
| 3510 | (let ((fname |
| 3511 | (expand-file-name |
| 3512 | (format "#%s#" buffer-name) |
| 3513 | ;; Try a few alternative directories, to get one we can |
| 3514 | ;; write it. |
| 3515 | (cond |
| 3516 | ((file-writable-p default-directory) default-directory) |
| 3517 | ((file-writable-p "/var/tmp/") "/var/tmp/") |
| 3518 | ("~/"))))) |
| 3519 | (if (and (memq system-type '(ms-dos windows-nt)) |
| 3520 | ;; Don't modify remote (ange-ftp) filenames |
| 3521 | (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" fname))) |
| 3522 | ;; The call to convert-standard-filename is in case |
| 3523 | ;; buffer-name includes characters not allowed by the |
| 3524 | ;; DOS/Windows filesystems. make-temp-file writes to the |
| 3525 | ;; file it creates, so we must fix the file name _before_ |
| 3526 | ;; make-temp-file is called. |
| 3527 | (convert-standard-filename fname) |
| 3528 | fname)) |
| 3529 | nil "#")) |
| 3530 | ;; make-temp-file creates the file, |
| 3531 | ;; but we don't want it to exist until we do an auto-save. |
| 3532 | (condition-case () |
| 3533 | (delete-file file-name) |
| 3534 | (file-error nil)) |
| 3535 | file-name))) |
| 3536 | |
| 3537 | (defun auto-save-file-name-p (filename) |
| 3538 | "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'. |
| 3539 | FILENAME should lack slashes. You can redefine this for customization." |
| 3540 | (string-match "^#.*#$" filename)) |
| 3541 | \f |
| 3542 | (defun wildcard-to-regexp (wildcard) |
| 3543 | "Given a shell file name pattern WILDCARD, return an equivalent regexp. |
| 3544 | The generated regexp will match a filename iff the filename |
| 3545 | matches that wildcard according to shell rules. Only wildcards known |
| 3546 | by `sh' are supported." |
| 3547 | (let* ((i (string-match "[[.*+\\^$?]" wildcard)) |
| 3548 | ;; Copy the initial run of non-special characters. |
| 3549 | (result (substring wildcard 0 i)) |
| 3550 | (len (length wildcard))) |
| 3551 | ;; If no special characters, we're almost done. |
| 3552 | (if i |
| 3553 | (while (< i len) |
| 3554 | (let ((ch (aref wildcard i)) |
| 3555 | j) |
| 3556 | (setq |
| 3557 | result |
| 3558 | (concat result |
| 3559 | (cond |
| 3560 | ((and (eq ch ?\[) |
| 3561 | (< (1+ i) len) |
| 3562 | (eq (aref wildcard (1+ i)) ?\])) |
| 3563 | "\\[") |
| 3564 | ((eq ch ?\[) ; [...] maps to regexp char class |
| 3565 | (progn |
| 3566 | (setq i (1+ i)) |
| 3567 | (concat |
| 3568 | (cond |
| 3569 | ((eq (aref wildcard i) ?!) ; [!...] -> [^...] |
| 3570 | (progn |
| 3571 | (setq i (1+ i)) |
| 3572 | (if (eq (aref wildcard i) ?\]) |
| 3573 | (progn |
| 3574 | (setq i (1+ i)) |
| 3575 | "[^]") |
| 3576 | "[^"))) |
| 3577 | ((eq (aref wildcard i) ?^) |
| 3578 | ;; Found "[^". Insert a `\0' character |
| 3579 | ;; (which cannot happen in a filename) |
| 3580 | ;; into the character class, so that `^' |
| 3581 | ;; is not the first character after `[', |
| 3582 | ;; and thus non-special in a regexp. |
| 3583 | (progn |
| 3584 | (setq i (1+ i)) |
| 3585 | "[\000^")) |
| 3586 | ((eq (aref wildcard i) ?\]) |
| 3587 | ;; I don't think `]' can appear in a |
| 3588 | ;; character class in a wildcard, but |
| 3589 | ;; let's be general here. |
| 3590 | (progn |
| 3591 | (setq i (1+ i)) |
| 3592 | "[]")) |
| 3593 | (t "[")) |
| 3594 | (prog1 ; copy everything upto next `]'. |
| 3595 | (substring wildcard |
| 3596 | i |
| 3597 | (setq j (string-match |
| 3598 | "]" wildcard i))) |
| 3599 | (setq i (if j (1- j) (1- len))))))) |
| 3600 | ((eq ch ?.) "\\.") |
| 3601 | ((eq ch ?*) "[^\000]*") |
| 3602 | ((eq ch ?+) "\\+") |
| 3603 | ((eq ch ?^) "\\^") |
| 3604 | ((eq ch ?$) "\\$") |
| 3605 | ((eq ch ?\\) "\\\\") ; probably cannot happen... |
| 3606 | ((eq ch ??) "[^\000]") |
| 3607 | (t (char-to-string ch))))) |
| 3608 | (setq i (1+ i))))) |
| 3609 | ;; Shell wildcards should match the entire filename, |
| 3610 | ;; not its part. Make the regexp say so. |
| 3611 | (concat "\\`" result "\\'"))) |
| 3612 | \f |
| 3613 | (defcustom list-directory-brief-switches |
| 3614 | (if (eq system-type 'vax-vms) "" "-CF") |
| 3615 | "*Switches for `list-directory' to pass to `ls' for brief listing." |
| 3616 | :type 'string |
| 3617 | :group 'dired) |
| 3618 | |
| 3619 | (defcustom list-directory-verbose-switches |
| 3620 | (if (eq system-type 'vax-vms) |
| 3621 | "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)" |
| 3622 | "-l") |
| 3623 | "*Switches for `list-directory' to pass to `ls' for verbose listing." |
| 3624 | :type 'string |
| 3625 | :group 'dired) |
| 3626 | |
| 3627 | (defun file-expand-wildcards (pattern &optional full) |
| 3628 | "Expand wildcard pattern PATTERN. |
| 3629 | This returns a list of file names which match the pattern. |
| 3630 | |
| 3631 | If PATTERN is written as an absolute relative file name, |
| 3632 | the values are absolute also. |
| 3633 | |
| 3634 | If PATTERN is written as a relative file name, it is interpreted |
| 3635 | relative to the current default directory, `default-directory'. |
| 3636 | The file names returned are normally also relative to the current |
| 3637 | default directory. However, if FULL is non-nil, they are absolute." |
| 3638 | (save-match-data |
| 3639 | (let* ((nondir (file-name-nondirectory pattern)) |
| 3640 | (dirpart (file-name-directory pattern)) |
| 3641 | ;; A list of all dirs that DIRPART specifies. |
| 3642 | ;; This can be more than one dir |
| 3643 | ;; if DIRPART contains wildcards. |
| 3644 | (dirs (if (and dirpart (string-match "[[*?]" dirpart)) |
| 3645 | (mapcar 'file-name-as-directory |
| 3646 | (file-expand-wildcards (directory-file-name dirpart))) |
| 3647 | (list dirpart))) |
| 3648 | contents) |
| 3649 | (while dirs |
| 3650 | (when (or (null (car dirs)) ; Possible if DIRPART is not wild. |
| 3651 | (file-directory-p (directory-file-name (car dirs)))) |
| 3652 | (let ((this-dir-contents |
| 3653 | ;; Filter out "." and ".." |
| 3654 | (delq nil |
| 3655 | (mapcar #'(lambda (name) |
| 3656 | (unless (string-match "\\`\\.\\.?\\'" |
| 3657 | (file-name-nondirectory name)) |
| 3658 | name)) |
| 3659 | (directory-files (or (car dirs) ".") full |
| 3660 | (wildcard-to-regexp nondir)))))) |
| 3661 | (setq contents |
| 3662 | (nconc |
| 3663 | (if (and (car dirs) (not full)) |
| 3664 | (mapcar (function (lambda (name) (concat (car dirs) name))) |
| 3665 | this-dir-contents) |
| 3666 | this-dir-contents) |
| 3667 | contents)))) |
| 3668 | (setq dirs (cdr dirs))) |
| 3669 | contents))) |
| 3670 | |
| 3671 | (defun list-directory (dirname &optional verbose) |
| 3672 | "Display a list of files in or matching DIRNAME, a la `ls'. |
| 3673 | DIRNAME is globbed by the shell if necessary. |
| 3674 | Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. |
| 3675 | Actions controlled by variables `list-directory-brief-switches' |
| 3676 | and `list-directory-verbose-switches'." |
| 3677 | (interactive (let ((pfx current-prefix-arg)) |
| 3678 | (list (read-file-name (if pfx "List directory (verbose): " |
| 3679 | "List directory (brief): ") |
| 3680 | nil default-directory nil) |
| 3681 | pfx))) |
| 3682 | (let ((switches (if verbose list-directory-verbose-switches |
| 3683 | list-directory-brief-switches)) |
| 3684 | buffer) |
| 3685 | (or dirname (setq dirname default-directory)) |
| 3686 | (setq dirname (expand-file-name dirname)) |
| 3687 | (with-output-to-temp-buffer "*Directory*" |
| 3688 | (setq buffer standard-output) |
| 3689 | (buffer-disable-undo standard-output) |
| 3690 | (princ "Directory ") |
| 3691 | (princ dirname) |
| 3692 | (terpri) |
| 3693 | (save-excursion |
| 3694 | (set-buffer "*Directory*") |
| 3695 | (let ((wildcard (not (file-directory-p dirname)))) |
| 3696 | (insert-directory dirname switches wildcard (not wildcard))))) |
| 3697 | ;; Finishing with-output-to-temp-buffer seems to clobber default-directory. |
| 3698 | (with-current-buffer buffer |
| 3699 | (setq default-directory |
| 3700 | (if (file-directory-p dirname) |
| 3701 | (file-name-as-directory dirname) |
| 3702 | (file-name-directory dirname)))))) |
| 3703 | |
| 3704 | (defun shell-quote-wildcard-pattern (pattern) |
| 3705 | "Quote characters special to the shell in PATTERN, leave wildcards alone. |
| 3706 | |
| 3707 | PATTERN is assumed to represent a file-name wildcard suitable for the |
| 3708 | underlying filesystem. For Unix and GNU/Linux, the characters from the |
| 3709 | set [ \\t\\n;<>&|()#$] are quoted with a backslash; for DOS/Windows, all |
| 3710 | the parts of the pattern which don't include wildcard characters are |
| 3711 | quoted with double quotes. |
| 3712 | Existing quote characters in PATTERN are left alone, so you can pass |
| 3713 | PATTERN that already quotes some of the special characters." |
| 3714 | (save-match-data |
| 3715 | (cond |
| 3716 | ((memq system-type '(ms-dos windows-nt)) |
| 3717 | ;; DOS/Windows don't allow `"' in file names. So if the |
| 3718 | ;; argument has quotes, we can safely assume it is already |
| 3719 | ;; quoted by the caller. |
| 3720 | (if (or (string-match "[\"]" pattern) |
| 3721 | ;; We quote [&()#$'] in case their shell is a port of a |
| 3722 | ;; Unixy shell. We quote [,=+] because stock DOS and |
| 3723 | ;; Windows shells require that in some cases, such as |
| 3724 | ;; passing arguments to batch files that use positional |
| 3725 | ;; arguments like %1. |
| 3726 | (not (string-match "[ \t;&()#$',=+]" pattern))) |
| 3727 | pattern |
| 3728 | (let ((result "\"") |
| 3729 | (beg 0) |
| 3730 | end) |
| 3731 | (while (string-match "[*?]+" pattern beg) |
| 3732 | (setq end (match-beginning 0) |
| 3733 | result (concat result (substring pattern beg end) |
| 3734 | "\"" |
| 3735 | (substring pattern end (match-end 0)) |
| 3736 | "\"") |
| 3737 | beg (match-end 0))) |
| 3738 | (concat result (substring pattern beg) "\"")))) |
| 3739 | (t |
| 3740 | (let ((beg 0)) |
| 3741 | (while (string-match "[ \t\n;<>&|()#$]" pattern beg) |
| 3742 | (setq pattern |
| 3743 | (concat (substring pattern 0 (match-beginning 0)) |
| 3744 | "\\" |
| 3745 | (substring pattern (match-beginning 0))) |
| 3746 | beg (1+ (match-end 0))))) |
| 3747 | pattern)))) |
| 3748 | |
| 3749 | |
| 3750 | (defvar insert-directory-program "ls" |
| 3751 | "Absolute or relative name of the `ls' program used by `insert-directory'.") |
| 3752 | |
| 3753 | (defcustom directory-free-space-program "df" |
| 3754 | "*Program to get the amount of free space on a file system. |
| 3755 | We assume the output has the format of `df'. |
| 3756 | The value of this variable must be just a command name or file name; |
| 3757 | if you want to specify options, use `directory-free-space-args'. |
| 3758 | |
| 3759 | A value of nil disables this feature. |
| 3760 | |
| 3761 | If the function `file-system-info' is defined, it is always used in |
| 3762 | preference to the program given by this variable." |
| 3763 | :type '(choice (string :tag "Program") (const :tag "None" nil)) |
| 3764 | :group 'dired) |
| 3765 | |
| 3766 | (defcustom directory-free-space-args "-Pk" |
| 3767 | "*Options to use when running `directory-free-space-program'." |
| 3768 | :type 'string |
| 3769 | :group 'dired) |
| 3770 | |
| 3771 | (defun get-free-disk-space (dir) |
| 3772 | "Return the mount of free space on directory DIR's file system. |
| 3773 | The result is a string that gives the number of free 1KB blocks, |
| 3774 | or nil if the system call or the program which retrieve the infornmation |
| 3775 | fail. |
| 3776 | |
| 3777 | This function calls `file-system-info' if it is available, or invokes the |
| 3778 | program specified by `directory-free-space-program' if that is non-nil." |
| 3779 | ;; Try to find the number of free blocks. Non-Posix systems don't |
| 3780 | ;; always have df, but might have an equivalent system call. |
| 3781 | (if (fboundp 'file-system-info) |
| 3782 | (let ((fsinfo (file-system-info dir))) |
| 3783 | (if fsinfo |
| 3784 | (format "%.0f" (/ (nth 2 fsinfo) 1024)))) |
| 3785 | (save-match-data |
| 3786 | (with-temp-buffer |
| 3787 | (when (and directory-free-space-program |
| 3788 | (zerop (call-process directory-free-space-program |
| 3789 | nil t nil |
| 3790 | directory-free-space-args |
| 3791 | dir))) |
| 3792 | ;; Usual format is a header line followed by a line of |
| 3793 | ;; numbers. |
| 3794 | (goto-char (point-min)) |
| 3795 | (forward-line 1) |
| 3796 | (if (not (eobp)) |
| 3797 | (progn |
| 3798 | ;; Move to the end of the "available blocks" number. |
| 3799 | (skip-chars-forward "^ \t") |
| 3800 | (forward-word 3) |
| 3801 | ;; Copy it into AVAILABLE. |
| 3802 | (let ((end (point))) |
| 3803 | (forward-word -1) |
| 3804 | (buffer-substring (point) end))))))))) |
| 3805 | |
| 3806 | |
| 3807 | ;; insert-directory |
| 3808 | ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and |
| 3809 | ;; FULL-DIRECTORY-P is nil. |
| 3810 | ;; The single line of output must display FILE's name as it was |
| 3811 | ;; given, namely, an absolute path name. |
| 3812 | ;; - must insert exactly one line for each file if WILDCARD or |
| 3813 | ;; FULL-DIRECTORY-P is t, plus one optional "total" line |
| 3814 | ;; before the file lines, plus optional text after the file lines. |
| 3815 | ;; Lines are delimited by "\n", so filenames containing "\n" are not |
| 3816 | ;; allowed. |
| 3817 | ;; File lines should display the basename. |
| 3818 | ;; - must be consistent with |
| 3819 | ;; - functions dired-move-to-filename, (these two define what a file line is) |
| 3820 | ;; dired-move-to-end-of-filename, |
| 3821 | ;; dired-between-files, (shortcut for (not (dired-move-to-filename))) |
| 3822 | ;; dired-insert-headerline |
| 3823 | ;; dired-after-subdir-garbage (defines what a "total" line is) |
| 3824 | ;; - variable dired-subdir-regexp |
| 3825 | (defun insert-directory (file switches &optional wildcard full-directory-p) |
| 3826 | "Insert directory listing for FILE, formatted according to SWITCHES. |
| 3827 | Leaves point after the inserted text. |
| 3828 | SWITCHES may be a string of options, or a list of strings. |
| 3829 | Optional third arg WILDCARD means treat FILE as shell wildcard. |
| 3830 | Optional fourth arg FULL-DIRECTORY-P means file is a directory and |
| 3831 | switches do not contain `d', so that a full listing is expected. |
| 3832 | |
| 3833 | This works by running a directory listing program |
| 3834 | whose name is in the variable `insert-directory-program'. |
| 3835 | If WILDCARD, it also runs the shell specified by `shell-file-name'." |
| 3836 | ;; We need the directory in order to find the right handler. |
| 3837 | (let ((handler (find-file-name-handler (expand-file-name file) |
| 3838 | 'insert-directory))) |
| 3839 | (if handler |
| 3840 | (funcall handler 'insert-directory file switches |
| 3841 | wildcard full-directory-p) |
| 3842 | (if (eq system-type 'vax-vms) |
| 3843 | (vms-read-directory file switches (current-buffer)) |
| 3844 | (let (result available) |
| 3845 | |
| 3846 | ;; Read the actual directory using `insert-directory-program'. |
| 3847 | ;; RESULT gets the status code. |
| 3848 | (let ((coding-system-for-read |
| 3849 | (and enable-multibyte-characters |
| 3850 | (or file-name-coding-system |
| 3851 | default-file-name-coding-system))) |
| 3852 | ;; This is to control encoding the arguments in call-process. |
| 3853 | (coding-system-for-write coding-system-for-read)) |
| 3854 | (setq result |
| 3855 | (if wildcard |
| 3856 | ;; Run ls in the directory part of the file pattern |
| 3857 | ;; using the last component as argument. |
| 3858 | (let ((default-directory |
| 3859 | (if (file-name-absolute-p file) |
| 3860 | (file-name-directory file) |
| 3861 | (file-name-directory (expand-file-name file)))) |
| 3862 | (pattern (file-name-nondirectory file))) |
| 3863 | (call-process |
| 3864 | shell-file-name nil t nil |
| 3865 | "-c" |
| 3866 | (concat (if (memq system-type '(ms-dos windows-nt)) |
| 3867 | "" |
| 3868 | "\\") ; Disregard Unix shell aliases! |
| 3869 | insert-directory-program |
| 3870 | " -d " |
| 3871 | (if (stringp switches) |
| 3872 | switches |
| 3873 | (mapconcat 'identity switches " ")) |
| 3874 | " -- " |
| 3875 | ;; Quote some characters that have |
| 3876 | ;; special meanings in shells; but |
| 3877 | ;; don't quote the wildcards--we want |
| 3878 | ;; them to be special. We also |
| 3879 | ;; currently don't quote the quoting |
| 3880 | ;; characters in case people want to |
| 3881 | ;; use them explicitly to quote |
| 3882 | ;; wildcard characters. |
| 3883 | (shell-quote-wildcard-pattern pattern)))) |
| 3884 | ;; SunOS 4.1.3, SVr4 and others need the "." to list the |
| 3885 | ;; directory if FILE is a symbolic link. |
| 3886 | (apply 'call-process |
| 3887 | insert-directory-program nil t nil |
| 3888 | (append |
| 3889 | (if (listp switches) switches |
| 3890 | (unless (equal switches "") |
| 3891 | ;; Split the switches at any spaces so we can |
| 3892 | ;; pass separate options as separate args. |
| 3893 | (split-string switches))) |
| 3894 | ;; Avoid lossage if FILE starts with `-'. |
| 3895 | '("--") |
| 3896 | (progn |
| 3897 | (if (string-match "\\`~" file) |
| 3898 | (setq file (expand-file-name file))) |
| 3899 | (list |
| 3900 | (if full-directory-p |
| 3901 | (concat (file-name-as-directory file) ".") |
| 3902 | file)))))))) |
| 3903 | |
| 3904 | ;; If `insert-directory-program' failed, signal an error. |
| 3905 | (if (/= result 0) |
| 3906 | ;; On non-Posix systems, we cannot open a directory, so |
| 3907 | ;; don't even try, because that will always result in |
| 3908 | ;; the ubiquitous "Access denied". Instead, show the |
| 3909 | ;; command line so the user can try to guess what went wrong. |
| 3910 | (if (and (file-directory-p file) |
| 3911 | (memq system-type '(ms-dos windows-nt))) |
| 3912 | (error |
| 3913 | "Reading directory: \"%s %s -- %s\" exited with status %s" |
| 3914 | insert-directory-program |
| 3915 | (if (listp switches) (concat switches) switches) |
| 3916 | file result) |
| 3917 | ;; Unix. Access the file to get a suitable error. |
| 3918 | (access-file file "Reading directory") |
| 3919 | (error "Listing directory failed but `access-file' worked"))) |
| 3920 | |
| 3921 | ;; Try to insert the amount of free space. |
| 3922 | (save-excursion |
| 3923 | (goto-char (point-min)) |
| 3924 | ;; First find the line to put it on. |
| 3925 | (when (re-search-forward "^total" nil t) |
| 3926 | (let ((available (get-free-disk-space "."))) |
| 3927 | (when available |
| 3928 | ;; Replace "total" with "used", to avoid confusion. |
| 3929 | (replace-match "total used in directory") |
| 3930 | (end-of-line) |
| 3931 | (insert " available " available)))))))))) |
| 3932 | |
| 3933 | (defun insert-directory-safely (file switches |
| 3934 | &optional wildcard full-directory-p) |
| 3935 | "Insert directory listing for FILE, formatted according to SWITCHES. |
| 3936 | |
| 3937 | Like `insert-directory', but if FILE does not exist, it inserts a |
| 3938 | message to that effect instead of signaling an error." |
| 3939 | (if (file-exists-p file) |
| 3940 | (insert-directory file switches wildcard full-directory-p) |
| 3941 | ;; Simulate the message printed by `ls'. |
| 3942 | (insert (format "%s: No such file or directory\n" file)))) |
| 3943 | |
| 3944 | (defvar kill-emacs-query-functions nil |
| 3945 | "Functions to call with no arguments to query about killing Emacs. |
| 3946 | If any of these functions returns nil, killing Emacs is cancelled. |
| 3947 | `save-buffers-kill-emacs' (\\[save-buffers-kill-emacs]) calls these functions, |
| 3948 | but `kill-emacs', the low level primitive, does not. |
| 3949 | See also `kill-emacs-hook'.") |
| 3950 | |
| 3951 | (defcustom confirm-kill-emacs nil |
| 3952 | "How to ask for confirmation when leaving Emacs. |
| 3953 | If nil, the default, don't ask at all. If the value is non-nil, it should |
| 3954 | be a predicate function such as `yes-or-no-p'." |
| 3955 | :type '(choice (const :tag "Ask with yes-or-no-p" yes-or-no-p) |
| 3956 | (const :tag "Ask with y-or-n-p" y-or-n-p) |
| 3957 | (const :tag "Don't confirm" nil)) |
| 3958 | :group 'emacs |
| 3959 | :version "21.1") |
| 3960 | |
| 3961 | (defun save-buffers-kill-emacs (&optional arg) |
| 3962 | "Offer to save each buffer, then kill this Emacs process. |
| 3963 | With prefix arg, silently save all file-visiting buffers, then kill." |
| 3964 | (interactive "P") |
| 3965 | (save-some-buffers arg t) |
| 3966 | (and (or (not (memq t (mapcar (function |
| 3967 | (lambda (buf) (and (buffer-file-name buf) |
| 3968 | (buffer-modified-p buf)))) |
| 3969 | (buffer-list)))) |
| 3970 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) |
| 3971 | (or (not (fboundp 'process-list)) |
| 3972 | ;; process-list is not defined on VMS. |
| 3973 | (let ((processes (process-list)) |
| 3974 | active) |
| 3975 | (while processes |
| 3976 | (and (memq (process-status (car processes)) '(run stop open listen)) |
| 3977 | (process-query-on-exit-flag (car processes)) |
| 3978 | (setq active t)) |
| 3979 | (setq processes (cdr processes))) |
| 3980 | (or (not active) |
| 3981 | (list-processes t) |
| 3982 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) |
| 3983 | ;; Query the user for other things, perhaps. |
| 3984 | (run-hook-with-args-until-failure 'kill-emacs-query-functions) |
| 3985 | (or (null confirm-kill-emacs) |
| 3986 | (funcall confirm-kill-emacs "Really exit Emacs? ")) |
| 3987 | (kill-emacs))) |
| 3988 | \f |
| 3989 | ;; We use /: as a prefix to "quote" a file name |
| 3990 | ;; so that magic file name handlers will not apply to it. |
| 3991 | |
| 3992 | (setq file-name-handler-alist |
| 3993 | (cons '("\\`/:" . file-name-non-special) |
| 3994 | file-name-handler-alist)) |
| 3995 | |
| 3996 | ;; We depend on being the last handler on the list, |
| 3997 | ;; so that anything else which does need handling |
| 3998 | ;; has been handled already. |
| 3999 | ;; So it is safe for us to inhibit *all* magic file name handlers. |
| 4000 | |
| 4001 | (defun file-name-non-special (operation &rest arguments) |
| 4002 | (let ((file-name-handler-alist nil) |
| 4003 | (default-directory |
| 4004 | (if (eq operation 'insert-directory) |
| 4005 | (directory-file-name |
| 4006 | (expand-file-name |
| 4007 | (unhandled-file-name-directory default-directory))) |
| 4008 | default-directory)) |
| 4009 | ;; Get a list of the indices of the args which are file names. |
| 4010 | (file-arg-indices |
| 4011 | (cdr (or (assq operation |
| 4012 | ;; The first five are special because they |
| 4013 | ;; return a file name. We want to include the /: |
| 4014 | ;; in the return value. |
| 4015 | ;; So just avoid stripping it in the first place. |
| 4016 | '((expand-file-name . nil) |
| 4017 | (file-name-directory . nil) |
| 4018 | (file-name-as-directory . nil) |
| 4019 | (directory-file-name . nil) |
| 4020 | (file-name-sans-versions . nil) |
| 4021 | ;; `identity' means just return the first arg |
| 4022 | ;; as stripped of its quoting. |
| 4023 | (substitute-in-file-name . identity) |
| 4024 | (file-name-completion 1) |
| 4025 | (file-name-all-completions 1) |
| 4026 | (rename-file 0 1) |
| 4027 | (copy-file 0 1) |
| 4028 | (make-symbolic-link 0 1) |
| 4029 | (add-name-to-file 0 1))) |
| 4030 | ;; For all other operations, treat the first argument only |
| 4031 | ;; as the file name. |
| 4032 | '(nil 0)))) |
| 4033 | ;; Copy ARGUMENTS so we can replace elements in it. |
| 4034 | (arguments (copy-sequence arguments))) |
| 4035 | ;; Strip off the /: from the file names that have this handler. |
| 4036 | (save-match-data |
| 4037 | (while (consp file-arg-indices) |
| 4038 | (let ((pair (nthcdr (car file-arg-indices) arguments))) |
| 4039 | (and (car pair) |
| 4040 | (string-match "\\`/:" (car pair)) |
| 4041 | (setcar pair |
| 4042 | (if (= (length (car pair)) 2) |
| 4043 | "/" |
| 4044 | (substring (car pair) 2))))) |
| 4045 | (setq file-arg-indices (cdr file-arg-indices)))) |
| 4046 | (if (eq file-arg-indices 'identity) |
| 4047 | (car arguments) |
| 4048 | (apply operation arguments)))) |
| 4049 | \f |
| 4050 | (define-key ctl-x-map "\C-f" 'find-file) |
| 4051 | (define-key ctl-x-map "\C-r" 'find-file-read-only) |
| 4052 | (define-key ctl-x-map "\C-v" 'find-alternate-file) |
| 4053 | (define-key ctl-x-map "\C-s" 'save-buffer) |
| 4054 | (define-key ctl-x-map "s" 'save-some-buffers) |
| 4055 | (define-key ctl-x-map "\C-w" 'write-file) |
| 4056 | (define-key ctl-x-map "i" 'insert-file) |
| 4057 | (define-key esc-map "~" 'not-modified) |
| 4058 | (define-key ctl-x-map "\C-d" 'list-directory) |
| 4059 | (define-key ctl-x-map "\C-c" 'save-buffers-kill-emacs) |
| 4060 | |
| 4061 | (define-key ctl-x-4-map "f" 'find-file-other-window) |
| 4062 | (define-key ctl-x-4-map "r" 'find-file-read-only-other-window) |
| 4063 | (define-key ctl-x-4-map "\C-f" 'find-file-other-window) |
| 4064 | (define-key ctl-x-4-map "b" 'switch-to-buffer-other-window) |
| 4065 | (define-key ctl-x-4-map "\C-o" 'display-buffer) |
| 4066 | |
| 4067 | (define-key ctl-x-5-map "b" 'switch-to-buffer-other-frame) |
| 4068 | (define-key ctl-x-5-map "f" 'find-file-other-frame) |
| 4069 | (define-key ctl-x-5-map "\C-f" 'find-file-other-frame) |
| 4070 | (define-key ctl-x-5-map "r" 'find-file-read-only-other-frame) |
| 4071 | |
| 4072 | ;;; files.el ends here |