| 1 | ;;; files.el --- file input and output commands for Emacs |
| 2 | |
| 3 | ;; Copyright (C) 1985, 86, 87, 92, 93, |
| 4 | ;; 94, 95, 1996 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 | :type 'boolean |
| 45 | :group 'auto-save) |
| 46 | |
| 47 | (defcustom directory-abbrev-alist |
| 48 | nil |
| 49 | "*Alist of abbreviations for file directories. |
| 50 | A list of elements of the form (FROM . TO), each meaning to replace |
| 51 | FROM with TO when it appears in a directory name. This replacement is |
| 52 | done when setting up the default directory of a newly visited file. |
| 53 | *Every* FROM string should start with `^'. |
| 54 | |
| 55 | Do not use `~' in the TO strings. |
| 56 | They should be ordinary absolute directory names. |
| 57 | |
| 58 | Use this feature when you have directories which you normally refer to |
| 59 | via absolute symbolic links. Make TO the name of the link, and FROM |
| 60 | the name it is linked to." |
| 61 | :type '(repeat (cons :format "%v" |
| 62 | :value ("" . "") |
| 63 | (regexp :tag "From") |
| 64 | (regexp :tag "To"))) |
| 65 | :group 'abbrev |
| 66 | :group 'find-file) |
| 67 | |
| 68 | ;;; Turn off backup files on VMS since it has version numbers. |
| 69 | (defcustom make-backup-files (not (eq system-type 'vax-vms)) |
| 70 | "*Non-nil means make a backup of a file the first time it is saved. |
| 71 | This can be done by renaming the file or by copying. |
| 72 | |
| 73 | Renaming means that Emacs renames the existing file so that it is a |
| 74 | backup file, then writes the buffer into a new file. Any other names |
| 75 | that the old file had will now refer to the backup file. The new file |
| 76 | is owned by you and its group is defaulted. |
| 77 | |
| 78 | Copying means that Emacs copies the existing file into the backup |
| 79 | file, then writes the buffer on top of the existing file. Any other |
| 80 | names that the old file had will now refer to the new (edited) file. |
| 81 | The file's owner and group are unchanged. |
| 82 | |
| 83 | The choice of renaming or copying is controlled by the variables |
| 84 | `backup-by-copying', `backup-by-copying-when-linked' and |
| 85 | `backup-by-copying-when-mismatch'. See also `backup-inhibited'." |
| 86 | :type 'boolean |
| 87 | :group 'backup) |
| 88 | |
| 89 | ;; Do this so that local variables based on the file name |
| 90 | ;; are not overridden by the major mode. |
| 91 | (defvar backup-inhibited nil |
| 92 | "Non-nil means don't make a backup, regardless of the other parameters. |
| 93 | This variable is intended for use by making it local to a buffer. |
| 94 | But it is local only if you make it local.") |
| 95 | (put 'backup-inhibited 'permanent-local t) |
| 96 | |
| 97 | (defcustom backup-by-copying nil |
| 98 | "*Non-nil means always use copying to create backup files. |
| 99 | See documentation of variable `make-backup-files'." |
| 100 | :type 'boolean |
| 101 | :group 'backup) |
| 102 | |
| 103 | (defcustom backup-by-copying-when-linked nil |
| 104 | "*Non-nil means use copying to create backups for files with multiple names. |
| 105 | This causes the alternate names to refer to the latest version as edited. |
| 106 | This variable is relevant only if `backup-by-copying' is nil." |
| 107 | :type 'boolean |
| 108 | :group 'backup) |
| 109 | |
| 110 | (defcustom backup-by-copying-when-mismatch nil |
| 111 | "*Non-nil means create backups by copying if this preserves owner or group. |
| 112 | Renaming may still be used (subject to control of other variables) |
| 113 | when it would not result in changing the owner or group of the file; |
| 114 | that is, for files which are owned by you and whose group matches |
| 115 | the default for a new file created there by you. |
| 116 | This variable is relevant only if `backup-by-copying' is nil." |
| 117 | :type 'boolean |
| 118 | :group 'backup) |
| 119 | |
| 120 | (defvar backup-enable-predicate |
| 121 | '(lambda (name) |
| 122 | (or (< (length name) 5) |
| 123 | (not (string-equal "/tmp/" (substring name 0 5))))) |
| 124 | "Predicate that looks at a file name and decides whether to make backups. |
| 125 | Called with an absolute file name as argument, it returns t to enable backup.") |
| 126 | |
| 127 | (defcustom buffer-offer-save nil |
| 128 | "*Non-nil in a buffer means offer to save the buffer on exit |
| 129 | even if the buffer is not visiting a file. |
| 130 | Automatically local in all buffers." |
| 131 | :type 'boolean |
| 132 | :group 'backup) |
| 133 | (make-variable-buffer-local 'buffer-offer-save) |
| 134 | |
| 135 | (defcustom find-file-existing-other-name t |
| 136 | "*Non-nil means find a file under alternative names, in existing buffers. |
| 137 | This means if any existing buffer is visiting the file you want |
| 138 | under another name, you get the existing buffer instead of a new buffer." |
| 139 | :type 'boolean |
| 140 | :group 'find-file) |
| 141 | |
| 142 | (defcustom find-file-visit-truename nil |
| 143 | "*Non-nil means visit a file under its truename. |
| 144 | The truename of a file is found by chasing all links |
| 145 | both at the file level and at the levels of the containing directories." |
| 146 | :type 'boolean |
| 147 | :group 'find-file) |
| 148 | |
| 149 | (defcustom revert-without-query |
| 150 | nil |
| 151 | "*Specify which files should be reverted without query. |
| 152 | The value is a list of regular expressions. |
| 153 | If the file name matches one of these regular expressions, |
| 154 | then `revert-buffer' reverts the file without querying |
| 155 | if the file has changed on disk and you have not edited the buffer." |
| 156 | :type '(repeat regexp) |
| 157 | :group 'find-file) |
| 158 | |
| 159 | (defvar buffer-file-number nil |
| 160 | "The device number and file number of the file visited in the current buffer. |
| 161 | The value is a list of the form (FILENUM DEVNUM). |
| 162 | This pair of numbers uniquely identifies the file. |
| 163 | If the buffer is visiting a new file, the value is nil.") |
| 164 | (make-variable-buffer-local 'buffer-file-number) |
| 165 | (put 'buffer-file-number 'permanent-local t) |
| 166 | |
| 167 | (defvar buffer-file-numbers-unique (not (memq system-type '(windows-nt))) |
| 168 | "Non-nil means that buffer-file-number uniquely identifies files.") |
| 169 | |
| 170 | (defcustom file-precious-flag nil |
| 171 | "*Non-nil means protect against I/O errors while saving files. |
| 172 | Some modes set this non-nil in particular buffers. |
| 173 | |
| 174 | This feature works by writing the new contents into a temporary file |
| 175 | and then renaming the temporary file to replace the original. |
| 176 | In this way, any I/O error in writing leaves the original untouched, |
| 177 | and there is never any instant where the file is nonexistent. |
| 178 | |
| 179 | Note that this feature forces backups to be made by copying. |
| 180 | Yet, at the same time, saving a precious file |
| 181 | breaks any hard links between it and other files." |
| 182 | :type 'boolean |
| 183 | :group 'backup) |
| 184 | |
| 185 | (defcustom version-control nil |
| 186 | "*Control use of version numbers for backup files. |
| 187 | t means make numeric backup versions unconditionally. |
| 188 | nil means make them for files that have some already. |
| 189 | `never' means do not make them." |
| 190 | :type 'boolean |
| 191 | :group 'backup |
| 192 | :group 'vc) |
| 193 | |
| 194 | (defcustom dired-kept-versions 2 |
| 195 | "*When cleaning directory, number of versions to keep." |
| 196 | :type 'integer |
| 197 | :group 'backup |
| 198 | :group 'dired) |
| 199 | |
| 200 | (defcustom delete-old-versions nil |
| 201 | "*If t, delete excess backup versions silently. |
| 202 | If nil, ask confirmation. Any other value prevents any trimming." |
| 203 | :type '(choice (const :tag "Delete" t) |
| 204 | (const :tag "Ask" nil) |
| 205 | (sexp :tag "Leave" :format "%t\n" other)) |
| 206 | :group 'backup) |
| 207 | |
| 208 | (defcustom kept-old-versions 2 |
| 209 | "*Number of oldest versions to keep when a new numbered backup is made." |
| 210 | :type 'integer |
| 211 | :group 'backup) |
| 212 | |
| 213 | (defcustom kept-new-versions 2 |
| 214 | "*Number of newest versions to keep when a new numbered backup is made. |
| 215 | Includes the new backup. Must be > 0" |
| 216 | :type 'integer |
| 217 | :group 'backup) |
| 218 | |
| 219 | (defcustom require-final-newline nil |
| 220 | "*Value of t says silently ensure a file ends in a newline when it is saved. |
| 221 | Non-nil but not t says ask user whether to add a newline when there isn't one. |
| 222 | nil means don't add newlines." |
| 223 | :type '(choice (const :tag "Off" nil) |
| 224 | (const :tag "Add" t) |
| 225 | (sexp :tag "Ask" :format "%t\n" ask)) |
| 226 | :group 'editing-basics) |
| 227 | |
| 228 | (defcustom auto-save-default t |
| 229 | "*Non-nil says by default do auto-saving of every file-visiting buffer." |
| 230 | :type 'boolean |
| 231 | :group 'auto-save) |
| 232 | |
| 233 | (defcustom auto-save-visited-file-name nil |
| 234 | "*Non-nil says auto-save a buffer in the file it is visiting, when practical. |
| 235 | Normally auto-save files are written under other names." |
| 236 | :type 'boolean |
| 237 | :group 'auto-save) |
| 238 | |
| 239 | (defcustom save-abbrevs nil |
| 240 | "*Non-nil means save word abbrevs too when files are saved. |
| 241 | Loading an abbrev file sets this to t." |
| 242 | :type 'boolean |
| 243 | :group 'abbrev) |
| 244 | |
| 245 | (defcustom find-file-run-dired t |
| 246 | "*Non-nil says run dired if `find-file' is given the name of a directory." |
| 247 | :type 'boolean |
| 248 | :group 'find-file) |
| 249 | |
| 250 | ;;;It is not useful to make this a local variable. |
| 251 | ;;;(put 'find-file-not-found-hooks 'permanent-local t) |
| 252 | (defvar find-file-not-found-hooks nil |
| 253 | "List of functions to be called for `find-file' on nonexistent file. |
| 254 | These functions are called as soon as the error is detected. |
| 255 | `buffer-file-name' is already set up. |
| 256 | The functions are called in the order given until one of them returns non-nil.") |
| 257 | |
| 258 | ;;;It is not useful to make this a local variable. |
| 259 | ;;;(put 'find-file-hooks 'permanent-local t) |
| 260 | (defvar find-file-hooks nil |
| 261 | "List of functions to be called after a buffer is loaded from a file. |
| 262 | The buffer's local variables (if any) will have been processed before the |
| 263 | functions are called.") |
| 264 | |
| 265 | (defvar write-file-hooks nil |
| 266 | "List of functions to be called before writing out a buffer to a file. |
| 267 | If one of them returns non-nil, the file is considered already written |
| 268 | and the rest are not called. |
| 269 | These hooks are considered to pertain to the visited file. |
| 270 | So this list is cleared if you change the visited file name. |
| 271 | |
| 272 | Don't make this variable buffer-local; instead, use `local-write-file-hooks'. |
| 273 | See also `write-contents-hooks'.") |
| 274 | ;;; However, in case someone does make it local... |
| 275 | (put 'write-file-hooks 'permanent-local t) |
| 276 | |
| 277 | (defvar local-write-file-hooks nil |
| 278 | "Just like `write-file-hooks', except intended for per-buffer use. |
| 279 | The functions in this list are called before the ones in |
| 280 | `write-file-hooks'. |
| 281 | |
| 282 | This variable is meant to be used for hooks that have to do with a |
| 283 | particular visited file. Therefore, it is a permanent local, so that |
| 284 | changing the major mode does not clear it. However, calling |
| 285 | `set-visited-file-name' does clear it.") |
| 286 | (make-variable-buffer-local 'local-write-file-hooks) |
| 287 | (put 'local-write-file-hooks 'permanent-local t) |
| 288 | |
| 289 | (defvar write-contents-hooks nil |
| 290 | "List of functions to be called before writing out a buffer to a file. |
| 291 | If one of them returns non-nil, the file is considered already written |
| 292 | and the rest are not called. |
| 293 | |
| 294 | This variable is meant to be used for hooks that pertain to the |
| 295 | buffer's contents, not to the particular visited file; thus, |
| 296 | `set-visited-file-name' does not clear this variable; but changing the |
| 297 | major mode does clear it. |
| 298 | |
| 299 | This variable automatically becomes buffer-local whenever it is set. |
| 300 | If you use `add-hook' to add elements to the list, use nil for the |
| 301 | LOCAL argument. |
| 302 | |
| 303 | See also `write-file-hooks'.") |
| 304 | (make-variable-buffer-local 'write-contents-hooks) |
| 305 | |
| 306 | (defcustom enable-local-variables t |
| 307 | "*Control use of local variables in files you visit. |
| 308 | The value can be t, nil or something else. |
| 309 | A value of t means file local variables specifications are obeyed; |
| 310 | nil means they are ignored; anything else means query. |
| 311 | |
| 312 | The command \\[normal-mode] always obeys file local variable |
| 313 | specifications and ignores this variable." |
| 314 | :type '(choice (const :tag "Obey" t) |
| 315 | (const :tag "Ignore" nil) |
| 316 | (sexp :tag "Query" :format "%t\n" other)) |
| 317 | :group 'find-file) |
| 318 | |
| 319 | (defcustom enable-local-eval 'maybe |
| 320 | "*Control processing of the \"variable\" `eval' in a file's local variables. |
| 321 | The value can be t, nil or something else. |
| 322 | A value of t means obey `eval' variables; |
| 323 | nil means ignore them; anything else means query. |
| 324 | |
| 325 | The command \\[normal-mode] always obeys local-variables lists |
| 326 | and ignores this variable." |
| 327 | :type '(choice (const :tag "Obey" t) |
| 328 | (const :tag "Ignore" nil) |
| 329 | (sexp :tag "Query" :format "%t\n" other)) |
| 330 | :group 'find-file) |
| 331 | |
| 332 | ;; Avoid losing in versions where CLASH_DETECTION is disabled. |
| 333 | (or (fboundp 'lock-buffer) |
| 334 | (defalias 'lock-buffer 'ignore)) |
| 335 | (or (fboundp 'unlock-buffer) |
| 336 | (defalias 'unlock-buffer 'ignore)) |
| 337 | (or (fboundp 'file-locked-p) |
| 338 | (defalias 'file-locked-p 'ignore)) |
| 339 | |
| 340 | (defvar view-read-only nil |
| 341 | "*Non-nil means buffers visiting files read-only, do it in view mode.") |
| 342 | |
| 343 | ;; This hook function provides support for ange-ftp host name |
| 344 | ;; completion. It runs the usual ange-ftp hook, but only for |
| 345 | ;; completion operations. Having this here avoids the need |
| 346 | ;; to load ange-ftp when it's not really in use. |
| 347 | (defun ange-ftp-completion-hook-function (op &rest args) |
| 348 | (if (memq op '(file-name-completion file-name-all-completions)) |
| 349 | (apply 'ange-ftp-hook-function op args) |
| 350 | (let ((inhibit-file-name-handlers |
| 351 | (cons 'ange-ftp-completion-hook-function |
| 352 | (and (eq inhibit-file-name-operation op) |
| 353 | inhibit-file-name-handlers))) |
| 354 | (inhibit-file-name-operation op)) |
| 355 | (apply op args)))) |
| 356 | |
| 357 | (defun convert-standard-filename (filename) |
| 358 | "Convert a standard file's name to something suitable for the current OS. |
| 359 | This function's standard definition is trivial; it just returns the argument. |
| 360 | However, on some systems, the function is redefined |
| 361 | with a definition that really does change some file names." |
| 362 | filename) |
| 363 | \f |
| 364 | (defun pwd () |
| 365 | "Show the current default directory." |
| 366 | (interactive nil) |
| 367 | (message "Directory %s" default-directory)) |
| 368 | |
| 369 | (defvar cd-path nil |
| 370 | "Value of the CDPATH environment variable, as a list. |
| 371 | Not actually set up until the first time you you use it.") |
| 372 | |
| 373 | (defvar path-separator ":" |
| 374 | "Character used to separate directories in search paths.") |
| 375 | |
| 376 | (defun parse-colon-path (cd-path) |
| 377 | "Explode a colon-separated search path into a list of directory names." |
| 378 | (and cd-path |
| 379 | (let (cd-prefix cd-list (cd-start 0) cd-colon) |
| 380 | (setq cd-path (concat cd-path path-separator)) |
| 381 | (while (setq cd-colon (string-match path-separator cd-path cd-start)) |
| 382 | (setq cd-list |
| 383 | (nconc cd-list |
| 384 | (list (if (= cd-start cd-colon) |
| 385 | nil |
| 386 | (substitute-in-file-name |
| 387 | (file-name-as-directory |
| 388 | (substring cd-path cd-start cd-colon))))))) |
| 389 | (setq cd-start (+ cd-colon 1))) |
| 390 | cd-list))) |
| 391 | |
| 392 | (defun cd-absolute (dir) |
| 393 | "Change current directory to given absolute file name DIR." |
| 394 | ;; Put the name into directory syntax now, |
| 395 | ;; because otherwise expand-file-name may give some bad results. |
| 396 | (if (not (eq system-type 'vax-vms)) |
| 397 | (setq dir (file-name-as-directory dir))) |
| 398 | (setq dir (abbreviate-file-name (expand-file-name dir))) |
| 399 | (if (not (file-directory-p dir)) |
| 400 | (if (file-exists-p dir) |
| 401 | (error "%s is not a directory" dir) |
| 402 | (error "%s: no such directory" dir)) |
| 403 | (if (file-executable-p dir) |
| 404 | (setq default-directory dir) |
| 405 | (error "Cannot cd to %s: Permission denied" dir)))) |
| 406 | |
| 407 | (defun cd (dir) |
| 408 | "Make DIR become the current buffer's default directory. |
| 409 | If your environment includes a `CDPATH' variable, try each one of that |
| 410 | colon-separated list of directories when resolving a relative directory name." |
| 411 | (interactive |
| 412 | (list (read-file-name "Change default directory: " |
| 413 | default-directory default-directory |
| 414 | (and (member cd-path '(nil ("./"))) |
| 415 | (null (getenv "CDPATH")))))) |
| 416 | (if (file-name-absolute-p dir) |
| 417 | (cd-absolute (expand-file-name dir)) |
| 418 | (if (null cd-path) |
| 419 | (let ((trypath (parse-colon-path (getenv "CDPATH")))) |
| 420 | (setq cd-path (or trypath (list "./"))))) |
| 421 | (if (not (catch 'found |
| 422 | (mapcar |
| 423 | (function (lambda (x) |
| 424 | (let ((f (expand-file-name (concat x dir)))) |
| 425 | (if (file-directory-p f) |
| 426 | (progn |
| 427 | (cd-absolute f) |
| 428 | (throw 'found t)))))) |
| 429 | cd-path) |
| 430 | nil)) |
| 431 | (error "No such directory found via CDPATH environment variable")))) |
| 432 | |
| 433 | (defun load-file (file) |
| 434 | "Load the Lisp file named FILE." |
| 435 | (interactive "fLoad file: ") |
| 436 | (load (expand-file-name file) nil nil t)) |
| 437 | |
| 438 | (defun load-library (library) |
| 439 | "Load the library named LIBRARY. |
| 440 | This is an interface to the function `load'." |
| 441 | (interactive "sLoad library: ") |
| 442 | (load library)) |
| 443 | |
| 444 | (defun file-local-copy (file &optional buffer) |
| 445 | "Copy the file FILE into a temporary file on this machine. |
| 446 | Returns the name of the local copy, or nil, if FILE is directly |
| 447 | accessible." |
| 448 | (let ((handler (find-file-name-handler file 'file-local-copy))) |
| 449 | (if handler |
| 450 | (funcall handler 'file-local-copy file) |
| 451 | nil))) |
| 452 | |
| 453 | (defun file-truename (filename &optional counter prev-dirs) |
| 454 | "Return the truename of FILENAME, which should be absolute. |
| 455 | The truename of a file name is found by chasing symbolic links |
| 456 | both at the level of the file and at the level of the directories |
| 457 | containing it, until no links are left at any level. |
| 458 | |
| 459 | The arguments COUNTER and PREV-DIRS are used only in recursive calls. |
| 460 | Do not specify them in other calls." |
| 461 | ;; COUNTER can be a cons cell whose car is the count of how many more links |
| 462 | ;; to chase before getting an error. |
| 463 | ;; PREV-DIRS can be a cons cell whose car is an alist |
| 464 | ;; of truenames we've just recently computed. |
| 465 | |
| 466 | ;; The last test looks dubious, maybe `+' is meant here? --simon. |
| 467 | (if (or (string= filename "") (string= filename "~") |
| 468 | (and (string= (substring filename 0 1) "~") |
| 469 | (string-match "~[^/]*" filename))) |
| 470 | (progn |
| 471 | (setq filename (expand-file-name filename)) |
| 472 | (if (string= filename "") |
| 473 | (setq filename "/")))) |
| 474 | (or counter (setq counter (list 100))) |
| 475 | (let (done |
| 476 | ;; For speed, remove the ange-ftp completion handler from the list. |
| 477 | ;; We know it's not needed here. |
| 478 | ;; For even more speed, do this only on the outermost call. |
| 479 | (file-name-handler-alist |
| 480 | (if prev-dirs file-name-handler-alist |
| 481 | (let ((tem (copy-sequence file-name-handler-alist))) |
| 482 | (delq (rassq 'ange-ftp-completion-hook-function tem) tem))))) |
| 483 | (or prev-dirs (setq prev-dirs (list nil))) |
| 484 | |
| 485 | ;; andrewi@harlequin.co.uk - none of the following code (except for |
| 486 | ;; invoking the file-name handler) currently applies on Windows |
| 487 | ;; (ie. there are no native symlinks), but there is an issue with |
| 488 | ;; case differences being ignored by the OS, and short "8.3 DOS" |
| 489 | ;; name aliases existing for all files. (The short names are not |
| 490 | ;; reported by directory-files, but can be used to refer to files.) |
| 491 | ;; It seems appropriate for file-truename to resolve these issues in |
| 492 | ;; the most natural way, which on Windows is to call the function |
| 493 | ;; `w32-long-file-name' - this returns the exact name of a file as |
| 494 | ;; it is stored on disk (expanding short name aliases with the full |
| 495 | ;; name in the process). |
| 496 | (if (eq system-type 'windows-nt) |
| 497 | (let ((handler (find-file-name-handler filename 'file-truename)) |
| 498 | newname) |
| 499 | ;; For file name that has a special handler, call handler. |
| 500 | ;; This is so that ange-ftp can save time by doing a no-op. |
| 501 | (if handler |
| 502 | (setq filename (funcall handler 'file-truename filename)) |
| 503 | ;; If filename contains a wildcard, newname will be the old name. |
| 504 | (if (string-match "[*?]" filename) |
| 505 | (setq newname filename) |
| 506 | ;; If filename doesn't exist, newname will be nil. |
| 507 | (setq newname (w32-long-file-name filename))) |
| 508 | (setq filename (or newname filename))) |
| 509 | (setq done t))) |
| 510 | |
| 511 | ;; If this file directly leads to a link, process that iteratively |
| 512 | ;; so that we don't use lots of stack. |
| 513 | (while (not done) |
| 514 | (setcar counter (1- (car counter))) |
| 515 | (if (< (car counter) 0) |
| 516 | (error "Apparent cycle of symbolic links for %s" filename)) |
| 517 | (let ((handler (find-file-name-handler filename 'file-truename))) |
| 518 | ;; For file name that has a special handler, call handler. |
| 519 | ;; This is so that ange-ftp can save time by doing a no-op. |
| 520 | (if handler |
| 521 | (setq filename (funcall handler 'file-truename filename) |
| 522 | done t) |
| 523 | (let ((dir (or (file-name-directory filename) default-directory)) |
| 524 | target dirfile) |
| 525 | ;; Get the truename of the directory. |
| 526 | (setq dirfile (directory-file-name dir)) |
| 527 | ;; If these are equal, we have the (or a) root directory. |
| 528 | (or (string= dir dirfile) |
| 529 | ;; If this is the same dir we last got the truename for, |
| 530 | ;; save time--don't recalculate. |
| 531 | (if (assoc dir (car prev-dirs)) |
| 532 | (setq dir (cdr (assoc dir (car prev-dirs)))) |
| 533 | (let ((old dir) |
| 534 | (new (file-name-as-directory (file-truename dirfile counter prev-dirs)))) |
| 535 | (setcar prev-dirs (cons (cons old new) (car prev-dirs))) |
| 536 | (setq dir new)))) |
| 537 | (if (equal ".." (file-name-nondirectory filename)) |
| 538 | (setq filename |
| 539 | (directory-file-name (file-name-directory (directory-file-name dir))) |
| 540 | done t) |
| 541 | (if (equal "." (file-name-nondirectory filename)) |
| 542 | (setq filename (directory-file-name dir) |
| 543 | done t) |
| 544 | ;; Put it back on the file name. |
| 545 | (setq filename (concat dir (file-name-nondirectory filename))) |
| 546 | ;; Is the file name the name of a link? |
| 547 | (setq target (file-symlink-p filename)) |
| 548 | (if target |
| 549 | ;; Yes => chase that link, then start all over |
| 550 | ;; since the link may point to a directory name that uses links. |
| 551 | ;; We can't safely use expand-file-name here |
| 552 | ;; since target might look like foo/../bar where foo |
| 553 | ;; is itself a link. Instead, we handle . and .. above. |
| 554 | (setq filename |
| 555 | (if (file-name-absolute-p target) |
| 556 | target |
| 557 | (concat dir target)) |
| 558 | done nil) |
| 559 | ;; No, we are done! |
| 560 | (setq done t)))))))) |
| 561 | filename)) |
| 562 | |
| 563 | (defun file-chase-links (filename) |
| 564 | "Chase links in FILENAME until a name that is not a link. |
| 565 | Does not examine containing directories for links, |
| 566 | unlike `file-truename'." |
| 567 | (let (tem (count 100) (newname filename)) |
| 568 | (while (setq tem (file-symlink-p newname)) |
| 569 | (save-match-data |
| 570 | (if (= count 0) |
| 571 | (error "Apparent cycle of symbolic links for %s" filename)) |
| 572 | ;; In the context of a link, `//' doesn't mean what Emacs thinks. |
| 573 | (while (string-match "//+" tem) |
| 574 | (setq tem (replace-match "/" nil nil tem))) |
| 575 | ;; Handle `..' by hand, since it needs to work in the |
| 576 | ;; target of any directory symlink. |
| 577 | ;; This code is not quite complete; it does not handle |
| 578 | ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose. |
| 579 | (while (string-match "\\`\\.\\./" tem) |
| 580 | (setq tem (substring tem 3)) |
| 581 | (setq newname (expand-file-name newname)) |
| 582 | ;; Chase links in the default dir of the symlink. |
| 583 | (setq newname |
| 584 | (file-chase-links |
| 585 | (directory-file-name (file-name-directory newname)))) |
| 586 | ;; Now find the parent of that dir. |
| 587 | (setq newname (file-name-directory newname))) |
| 588 | (setq newname (expand-file-name tem (file-name-directory newname))) |
| 589 | (setq count (1- count)))) |
| 590 | newname)) |
| 591 | \f |
| 592 | (defun switch-to-buffer-other-window (buffer &optional norecord) |
| 593 | "Select buffer BUFFER in another window. |
| 594 | Optional second arg NORECORD non-nil means |
| 595 | do not put this buffer at the front of the list of recently selected ones." |
| 596 | (interactive "BSwitch to buffer in other window: ") |
| 597 | (let ((pop-up-windows t)) |
| 598 | (pop-to-buffer buffer t norecord))) |
| 599 | |
| 600 | (defun switch-to-buffer-other-frame (buffer &optional norecord) |
| 601 | "Switch to buffer BUFFER in another frame. |
| 602 | Optional second arg NORECORD non-nil means |
| 603 | do not put this buffer at the front of the list of recently selected ones." |
| 604 | (interactive "BSwitch to buffer in other frame: ") |
| 605 | (let ((pop-up-frames t)) |
| 606 | (pop-to-buffer buffer t norecord) |
| 607 | (raise-frame (window-frame (selected-window))))) |
| 608 | |
| 609 | (defun find-file (filename) |
| 610 | "Edit file FILENAME. |
| 611 | Switch to a buffer visiting file FILENAME, |
| 612 | creating one if none already exists." |
| 613 | (interactive "FFind file: ") |
| 614 | (switch-to-buffer (find-file-noselect filename))) |
| 615 | |
| 616 | (defun find-file-other-window (filename) |
| 617 | "Edit file FILENAME, in another window. |
| 618 | May create a new window, or reuse an existing one. |
| 619 | See the function `display-buffer'." |
| 620 | (interactive "FFind file in other window: ") |
| 621 | (switch-to-buffer-other-window (find-file-noselect filename))) |
| 622 | |
| 623 | (defun find-file-other-frame (filename) |
| 624 | "Edit file FILENAME, in another frame. |
| 625 | May create a new frame, or reuse an existing one. |
| 626 | See the function `display-buffer'." |
| 627 | (interactive "FFind file in other frame: ") |
| 628 | (switch-to-buffer-other-frame (find-file-noselect filename))) |
| 629 | |
| 630 | (defun find-file-read-only (filename) |
| 631 | "Edit file FILENAME but don't allow changes. |
| 632 | Like \\[find-file] but marks buffer as read-only. |
| 633 | Use \\[toggle-read-only] to permit editing." |
| 634 | (interactive "fFind file read-only: ") |
| 635 | (find-file filename) |
| 636 | (toggle-read-only 1) |
| 637 | (current-buffer)) |
| 638 | |
| 639 | (defun find-file-read-only-other-window (filename) |
| 640 | "Edit file FILENAME in another window but don't allow changes. |
| 641 | Like \\[find-file-other-window] but marks buffer as read-only. |
| 642 | Use \\[toggle-read-only] to permit editing." |
| 643 | (interactive "fFind file read-only other window: ") |
| 644 | (find-file-other-window filename) |
| 645 | (toggle-read-only 1) |
| 646 | (current-buffer)) |
| 647 | |
| 648 | (defun find-file-read-only-other-frame (filename) |
| 649 | "Edit file FILENAME in another frame but don't allow changes. |
| 650 | Like \\[find-file-other-frame] but marks buffer as read-only. |
| 651 | Use \\[toggle-read-only] to permit editing." |
| 652 | (interactive "fFind file read-only other frame: ") |
| 653 | (find-file-other-frame filename) |
| 654 | (toggle-read-only 1) |
| 655 | (current-buffer)) |
| 656 | |
| 657 | (defun find-alternate-file-other-window (filename) |
| 658 | "Find file FILENAME as a replacement for the file in the next window. |
| 659 | This command does not select that window." |
| 660 | (interactive |
| 661 | (save-selected-window |
| 662 | (other-window 1) |
| 663 | (let ((file buffer-file-name) |
| 664 | (file-name nil) |
| 665 | (file-dir nil)) |
| 666 | (and file |
| 667 | (setq file-name (file-name-nondirectory file) |
| 668 | file-dir (file-name-directory file))) |
| 669 | (list (read-file-name |
| 670 | "Find alternate file: " file-dir nil nil file-name))))) |
| 671 | (if (one-window-p) |
| 672 | (find-file-other-window filename) |
| 673 | (save-selected-window |
| 674 | (other-window 1) |
| 675 | (find-alternate-file filename)))) |
| 676 | |
| 677 | (defun find-alternate-file (filename) |
| 678 | "Find file FILENAME, select its buffer, kill previous buffer. |
| 679 | If the current buffer now contains an empty file that you just visited |
| 680 | \(presumably by mistake), use this command to visit the file you really want." |
| 681 | (interactive |
| 682 | (let ((file buffer-file-name) |
| 683 | (file-name nil) |
| 684 | (file-dir nil)) |
| 685 | (and file |
| 686 | (setq file-name (file-name-nondirectory file) |
| 687 | file-dir (file-name-directory file))) |
| 688 | (list (read-file-name |
| 689 | "Find alternate file: " file-dir nil nil file-name)))) |
| 690 | (and (buffer-modified-p) (buffer-file-name) |
| 691 | ;; (not buffer-read-only) |
| 692 | (not (yes-or-no-p (format "Buffer %s is modified; kill anyway? " |
| 693 | (buffer-name)))) |
| 694 | (error "Aborted")) |
| 695 | (let ((obuf (current-buffer)) |
| 696 | (ofile buffer-file-name) |
| 697 | (onum buffer-file-number) |
| 698 | (otrue buffer-file-truename) |
| 699 | (oname (buffer-name))) |
| 700 | (if (get-buffer " **lose**") |
| 701 | (kill-buffer " **lose**")) |
| 702 | (rename-buffer " **lose**") |
| 703 | (unwind-protect |
| 704 | (progn |
| 705 | (unlock-buffer) |
| 706 | (setq buffer-file-name nil) |
| 707 | (setq buffer-file-number nil) |
| 708 | (setq buffer-file-truename nil) |
| 709 | (find-file filename)) |
| 710 | (cond ((eq obuf (current-buffer)) |
| 711 | (setq buffer-file-name ofile) |
| 712 | (setq buffer-file-number onum) |
| 713 | (setq buffer-file-truename otrue) |
| 714 | (lock-buffer) |
| 715 | (rename-buffer oname)))) |
| 716 | (or (eq (current-buffer) obuf) |
| 717 | (kill-buffer obuf)))) |
| 718 | \f |
| 719 | (defun create-file-buffer (filename) |
| 720 | "Create a suitably named buffer for visiting FILENAME, and return it. |
| 721 | FILENAME (sans directory) is used unchanged if that name is free; |
| 722 | otherwise a string <2> or <3> or ... is appended to get an unused name." |
| 723 | (let ((lastname (file-name-nondirectory filename))) |
| 724 | (if (string= lastname "") |
| 725 | (setq lastname filename)) |
| 726 | (generate-new-buffer lastname))) |
| 727 | |
| 728 | (defun generate-new-buffer (name) |
| 729 | "Create and return a buffer with a name based on NAME. |
| 730 | Choose the buffer's name using `generate-new-buffer-name'." |
| 731 | (get-buffer-create (generate-new-buffer-name name))) |
| 732 | |
| 733 | (defvar automount-dir-prefix "^/tmp_mnt/" |
| 734 | "Regexp to match the automounter prefix in a directory name.") |
| 735 | |
| 736 | (defvar abbreviated-home-dir nil |
| 737 | "The user's homedir abbreviated according to `directory-abbrev-list'.") |
| 738 | |
| 739 | (defun abbreviate-file-name (filename) |
| 740 | "Return a version of FILENAME shortened using `directory-abbrev-alist'. |
| 741 | This also substitutes \"~\" for the user's home directory. |
| 742 | Type \\[describe-variable] directory-abbrev-alist RET for more information." |
| 743 | ;; Get rid of the prefixes added by the automounter. |
| 744 | (if (and automount-dir-prefix |
| 745 | (string-match automount-dir-prefix filename) |
| 746 | (file-exists-p (file-name-directory |
| 747 | (substring filename (1- (match-end 0)))))) |
| 748 | (setq filename (substring filename (1- (match-end 0))))) |
| 749 | (let ((tail directory-abbrev-alist)) |
| 750 | ;; If any elt of directory-abbrev-alist matches this name, |
| 751 | ;; abbreviate accordingly. |
| 752 | (while tail |
| 753 | (if (string-match (car (car tail)) filename) |
| 754 | (setq filename |
| 755 | (concat (cdr (car tail)) (substring filename (match-end 0))))) |
| 756 | (setq tail (cdr tail))) |
| 757 | ;; Compute and save the abbreviated homedir name. |
| 758 | ;; We defer computing this until the first time it's needed, to |
| 759 | ;; give time for directory-abbrev-alist to be set properly. |
| 760 | ;; We include a slash at the end, to avoid spurious matches |
| 761 | ;; such as `/usr/foobar' when the home dir is `/usr/foo'. |
| 762 | (or abbreviated-home-dir |
| 763 | (setq abbreviated-home-dir |
| 764 | (let ((abbreviated-home-dir "$foo")) |
| 765 | (concat "^" (abbreviate-file-name (expand-file-name "~")) |
| 766 | "\\(/\\|$\\)")))) |
| 767 | |
| 768 | ;; If FILENAME starts with the abbreviated homedir, |
| 769 | ;; make it start with `~' instead. |
| 770 | (if (and (string-match abbreviated-home-dir filename) |
| 771 | ;; If the home dir is just /, don't change it. |
| 772 | (not (and (= (match-end 0) 1) |
| 773 | (= (aref filename 0) ?/))) |
| 774 | ;; MS-DOS root directories can come with a drive letter; |
| 775 | ;; Novell Netware allows drive letters beyond `Z:'. |
| 776 | (not (and (or (eq system-type 'ms-dos) |
| 777 | (eq system-type 'windows-nt)) |
| 778 | (save-match-data |
| 779 | (string-match "^[a-zA-`]:/$" filename))))) |
| 780 | (setq filename |
| 781 | (concat "~" |
| 782 | (substring filename (match-beginning 1) (match-end 1)) |
| 783 | (substring filename (match-end 0))))) |
| 784 | filename)) |
| 785 | |
| 786 | (defcustom find-file-not-true-dirname-list nil |
| 787 | "*List of logical names for which visiting shouldn't save the true dirname. |
| 788 | On VMS, when you visit a file using a logical name that searches a path, |
| 789 | you may or may not want the visited file name to record the specific |
| 790 | directory where the file was found. If you *do not* want that, add the logical |
| 791 | name to this list as a string." |
| 792 | :type '(repeat (string :tag "Name")) |
| 793 | :group 'find-file) |
| 794 | |
| 795 | (defun find-buffer-visiting (filename) |
| 796 | "Return the buffer visiting file FILENAME (a string). |
| 797 | This is like `get-file-buffer', except that it checks for any buffer |
| 798 | visiting the same file, possibly under a different name. |
| 799 | If there is no such live buffer, return nil." |
| 800 | (let ((buf (get-file-buffer filename)) |
| 801 | (truename (abbreviate-file-name (file-truename filename)))) |
| 802 | (or buf |
| 803 | (let ((list (buffer-list)) found) |
| 804 | (while (and (not found) list) |
| 805 | (save-excursion |
| 806 | (set-buffer (car list)) |
| 807 | (if (and buffer-file-name |
| 808 | (string= buffer-file-truename truename)) |
| 809 | (setq found (car list)))) |
| 810 | (setq list (cdr list))) |
| 811 | found) |
| 812 | (let ((number (nthcdr 10 (file-attributes truename))) |
| 813 | (list (buffer-list)) found) |
| 814 | (and buffer-file-numbers-unique |
| 815 | number |
| 816 | (while (and (not found) list) |
| 817 | (save-excursion |
| 818 | (set-buffer (car list)) |
| 819 | (if (and buffer-file-name |
| 820 | (equal buffer-file-number number) |
| 821 | ;; Verify this buffer's file number |
| 822 | ;; still belongs to its file. |
| 823 | (file-exists-p buffer-file-name) |
| 824 | (equal (nthcdr 10 (file-attributes buffer-file-name)) |
| 825 | number)) |
| 826 | (setq found (car list)))) |
| 827 | (setq list (cdr list)))) |
| 828 | found)))) |
| 829 | \f |
| 830 | (defun find-file-noselect (filename &optional nowarn rawfile) |
| 831 | "Read file FILENAME into a buffer and return the buffer. |
| 832 | If a buffer exists visiting FILENAME, return that one, but |
| 833 | verify that the file has not changed since visited or saved. |
| 834 | The buffer is not selected, just returned to the caller. |
| 835 | Optional first arg NOWARN non-nil means suppress any warning messages. |
| 836 | Optional second arg RAWFILE non-nil means the file is read literally." |
| 837 | (setq filename |
| 838 | (abbreviate-file-name |
| 839 | (expand-file-name filename))) |
| 840 | (if (file-directory-p filename) |
| 841 | (if find-file-run-dired |
| 842 | (dired-noselect (if find-file-visit-truename |
| 843 | (abbreviate-file-name (file-truename filename)) |
| 844 | filename)) |
| 845 | (error "%s is a directory" filename)) |
| 846 | (let* ((buf (get-file-buffer filename)) |
| 847 | (truename (abbreviate-file-name (file-truename filename))) |
| 848 | (number (nthcdr 10 (file-attributes truename))) |
| 849 | ;; Find any buffer for a file which has same truename. |
| 850 | (other (and (not buf) (find-buffer-visiting filename))) |
| 851 | error) |
| 852 | ;; Let user know if there is a buffer with the same truename. |
| 853 | (if other |
| 854 | (progn |
| 855 | (or nowarn |
| 856 | (string-equal filename (buffer-file-name other)) |
| 857 | (message "%s and %s are the same file" |
| 858 | filename (buffer-file-name other))) |
| 859 | ;; Optionally also find that buffer. |
| 860 | (if (or find-file-existing-other-name find-file-visit-truename) |
| 861 | (setq buf other)))) |
| 862 | (if buf |
| 863 | (or nowarn |
| 864 | (verify-visited-file-modtime buf) |
| 865 | (cond ((not (file-exists-p filename)) |
| 866 | (error "File %s no longer exists!" filename)) |
| 867 | ;; Certain files should be reverted automatically |
| 868 | ;; if they have changed on disk and not in the buffer. |
| 869 | ((and (not (buffer-modified-p buf)) |
| 870 | (let ((tail revert-without-query) |
| 871 | (found nil)) |
| 872 | (while tail |
| 873 | (if (string-match (car tail) filename) |
| 874 | (setq found t)) |
| 875 | (setq tail (cdr tail))) |
| 876 | found)) |
| 877 | (with-current-buffer buf |
| 878 | (message "Reverting file %s..." filename) |
| 879 | (revert-buffer t t) |
| 880 | (message "Reverting file %s...done" filename))) |
| 881 | ((yes-or-no-p |
| 882 | (if (string= (file-name-nondirectory filename) |
| 883 | (buffer-name buf)) |
| 884 | (format |
| 885 | (if (buffer-modified-p buf) |
| 886 | "File %s changed on disk. Discard your edits? " |
| 887 | "File %s changed on disk. Reread from disk? ") |
| 888 | (file-name-nondirectory filename)) |
| 889 | (format |
| 890 | (if (buffer-modified-p buf) |
| 891 | "File %s changed on disk. Discard your edits in %s? " |
| 892 | "File %s changed on disk. Reread from disk into %s? ") |
| 893 | (file-name-nondirectory filename) |
| 894 | (buffer-name buf)))) |
| 895 | (with-current-buffer buf |
| 896 | (revert-buffer t t))) |
| 897 | ((not (eq rawfile (not (null find-file-literally)))) |
| 898 | (if rawfile |
| 899 | (message "File is already visited, and not literally") |
| 900 | (message "File is already visited, and visited literally"))))) |
| 901 | (save-excursion |
| 902 | ;;; The truename stuff makes this obsolete. |
| 903 | ;;; (let* ((link-name (car (file-attributes filename))) |
| 904 | ;;; (linked-buf (and (stringp link-name) |
| 905 | ;;; (get-file-buffer link-name)))) |
| 906 | ;;; (if (bufferp linked-buf) |
| 907 | ;;; (message "Symbolic link to file in buffer %s" |
| 908 | ;;; (buffer-name linked-buf)))) |
| 909 | (setq buf (create-file-buffer filename)) |
| 910 | (set-buffer-major-mode buf) |
| 911 | (set-buffer buf) |
| 912 | (erase-buffer) |
| 913 | (if rawfile |
| 914 | (condition-case () |
| 915 | (insert-file-contents-literally filename t) |
| 916 | (file-error |
| 917 | ;; Unconditionally set error |
| 918 | (setq error t))) |
| 919 | (condition-case () |
| 920 | (insert-file-contents filename t) |
| 921 | (file-error |
| 922 | ;; Run find-file-not-found-hooks until one returns non-nil. |
| 923 | (or (run-hook-with-args-until-success 'find-file-not-found-hooks) |
| 924 | ;; If they fail too, set error. |
| 925 | (setq error t))))) |
| 926 | ;; Find the file's truename, and maybe use that as visited name. |
| 927 | (setq buffer-file-truename truename) |
| 928 | (setq buffer-file-number number) |
| 929 | ;; On VMS, we may want to remember which directory in a search list |
| 930 | ;; the file was found in. |
| 931 | (and (eq system-type 'vax-vms) |
| 932 | (let (logical) |
| 933 | (if (string-match ":" (file-name-directory filename)) |
| 934 | (setq logical (substring (file-name-directory filename) |
| 935 | 0 (match-beginning 0)))) |
| 936 | (not (member logical find-file-not-true-dirname-list))) |
| 937 | (setq buffer-file-name buffer-file-truename)) |
| 938 | (if find-file-visit-truename |
| 939 | (setq buffer-file-name |
| 940 | (setq filename |
| 941 | (expand-file-name buffer-file-truename)))) |
| 942 | ;; Set buffer's default directory to that of the file. |
| 943 | (setq default-directory (file-name-directory filename)) |
| 944 | ;; Turn off backup files for certain file names. Since |
| 945 | ;; this is a permanent local, the major mode won't eliminate it. |
| 946 | (and (not (funcall backup-enable-predicate buffer-file-name)) |
| 947 | (progn |
| 948 | (make-local-variable 'backup-inhibited) |
| 949 | (setq backup-inhibited t))) |
| 950 | (if rawfile |
| 951 | (progn |
| 952 | (setq enable-multibyte-characters nil) |
| 953 | (make-local-variable 'find-file-literally) |
| 954 | (setq find-file-literally t)) |
| 955 | (after-find-file error (not nowarn)) |
| 956 | (setq buf (current-buffer))))) |
| 957 | buf))) |
| 958 | \f |
| 959 | (defun insert-file-contents-literally (filename &optional visit beg end replace) |
| 960 | "Like `insert-file-contents', but only reads in the file literally. |
| 961 | A buffer may be modified in several ways after reading into the buffer, |
| 962 | to Emacs features such as format decoding, character code |
| 963 | conversion, find-file-hooks, automatic uncompression, etc. |
| 964 | |
| 965 | This function ensures that none of these modifications will take place." |
| 966 | (let ((format-alist nil) |
| 967 | (after-insert-file-functions nil) |
| 968 | (coding-system-for-read 'no-conversion) |
| 969 | (coding-system-for-write 'no-conversion) |
| 970 | (jka-compr-compression-info-list nil) |
| 971 | (find-buffer-file-type-function |
| 972 | (if (fboundp 'find-buffer-file-type) |
| 973 | (symbol-function 'find-buffer-file-type) |
| 974 | nil))) |
| 975 | (unwind-protect |
| 976 | (progn |
| 977 | (fset 'find-buffer-file-type (lambda (filename) t)) |
| 978 | (insert-file-contents filename visit beg end replace)) |
| 979 | (if find-buffer-file-type-function |
| 980 | (fset 'find-buffer-file-type find-buffer-file-type-function) |
| 981 | (fmakunbound 'find-buffer-file-type))))) |
| 982 | |
| 983 | (defun insert-file-literally (filename) |
| 984 | "Insert contents of file FILENAME into buffer after point with no conversion. |
| 985 | |
| 986 | This function is meant for the user to run interactively. |
| 987 | Don't call it from programs! Use `insert-file-contents-literally' instead. |
| 988 | \(Its calling sequence is different; see its documentation)." |
| 989 | (interactive "*fInsert file literally: ") |
| 990 | (if (file-directory-p filename) |
| 991 | (signal 'file-error (list "Opening input file" "file is a directory" |
| 992 | filename))) |
| 993 | (let ((tem (insert-file-contents-literally filename))) |
| 994 | (push-mark (+ (point) (car (cdr tem)))))) |
| 995 | |
| 996 | (defvar find-file-literally nil |
| 997 | "Non-nil if this buffer was made by `find-file-literally' or equivalent. |
| 998 | This is a permanent local.") |
| 999 | (put 'find-file-literally 'permanent-local t) |
| 1000 | |
| 1001 | (defun find-file-literally (filename) |
| 1002 | "Visit file FILENAME with no conversion of any kind. |
| 1003 | Format conversion and character code conversion are both disabled, |
| 1004 | and multibyte characters are disabled in the resulting buffer. |
| 1005 | The major mode used is Fundamental mode regardless of the file name, |
| 1006 | and local variable specifications in the file are ignored. |
| 1007 | Automatic uncompression is also disabled. |
| 1008 | |
| 1009 | You cannot absolutely rely on this function to result in |
| 1010 | visiting the file literally. If Emacs already has a buffer |
| 1011 | which is visiting the file, you get the existing buffer, |
| 1012 | regardless of whether it was created literally or not. |
| 1013 | |
| 1014 | In a Lisp program, if you want to be sure of accessing a file's |
| 1015 | contents literally, you should create a temporary buffer and then read |
| 1016 | the file contents into it using `insert-file-contents-literally'." |
| 1017 | (interactive "FFind file literally: ") |
| 1018 | (switch-to-buffer (find-file-noselect filename nil t))) |
| 1019 | \f |
| 1020 | (defvar after-find-file-from-revert-buffer nil) |
| 1021 | |
| 1022 | (defun after-find-file (&optional error warn noauto |
| 1023 | after-find-file-from-revert-buffer |
| 1024 | nomodes) |
| 1025 | "Called after finding a file and by the default revert function. |
| 1026 | Sets buffer mode, parses local variables. |
| 1027 | Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an |
| 1028 | error in reading the file. WARN non-nil means warn if there |
| 1029 | exists an auto-save file more recent than the visited file. |
| 1030 | NOAUTO means don't mess with auto-save mode. |
| 1031 | Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil |
| 1032 | means this call was from `revert-buffer'. |
| 1033 | Fifth arg NOMODES non-nil means don't alter the file's modes. |
| 1034 | Finishes by calling the functions in `find-file-hooks' |
| 1035 | unless NOMODES is non-nil." |
| 1036 | (setq buffer-read-only (not (file-writable-p buffer-file-name))) |
| 1037 | (if noninteractive |
| 1038 | nil |
| 1039 | (let* (not-serious |
| 1040 | (msg |
| 1041 | (cond ((and error (file-attributes buffer-file-name)) |
| 1042 | (setq buffer-read-only t) |
| 1043 | "File exists, but cannot be read.") |
| 1044 | ((not buffer-read-only) |
| 1045 | (if (and warn |
| 1046 | (file-newer-than-file-p (make-auto-save-file-name) |
| 1047 | buffer-file-name)) |
| 1048 | (format "%s has auto save data; consider M-x recover-file" |
| 1049 | (file-name-nondirectory buffer-file-name)) |
| 1050 | (setq not-serious t) |
| 1051 | (if error "(New file)" nil))) |
| 1052 | ((not error) |
| 1053 | (setq not-serious t) |
| 1054 | "Note: file is write protected") |
| 1055 | ((file-attributes (directory-file-name default-directory)) |
| 1056 | "File not found and directory write-protected") |
| 1057 | ((file-exists-p (file-name-directory buffer-file-name)) |
| 1058 | (setq buffer-read-only nil)) |
| 1059 | (t |
| 1060 | (setq buffer-read-only nil) |
| 1061 | (if (file-exists-p (file-name-directory (directory-file-name (file-name-directory buffer-file-name)))) |
| 1062 | "Use M-x make-dir RET RET to create the directory" |
| 1063 | "Use C-u M-x make-dir RET RET to create directory and its parents"))))) |
| 1064 | (if msg |
| 1065 | (progn |
| 1066 | (message msg) |
| 1067 | (or not-serious (sit-for 1 nil t))))) |
| 1068 | (if (and auto-save-default (not noauto)) |
| 1069 | (auto-save-mode t))) |
| 1070 | (if nomodes |
| 1071 | nil |
| 1072 | (normal-mode t) |
| 1073 | (if (and buffer-read-only view-read-only |
| 1074 | (not (eq (get major-mode 'mode-class) 'special))) |
| 1075 | (view-mode-enter)) |
| 1076 | (run-hooks 'find-file-hooks))) |
| 1077 | |
| 1078 | (defun normal-mode (&optional find-file) |
| 1079 | "Choose the major mode for this buffer automatically. |
| 1080 | Also sets up any specified local variables of the file. |
| 1081 | Uses the visited file name, the -*- line, and the local variables spec. |
| 1082 | |
| 1083 | This function is called automatically from `find-file'. In that case, |
| 1084 | we may set up specified local variables depending on the value of |
| 1085 | `enable-local-variables': if it is t, we do; if it is nil, we don't; |
| 1086 | otherwise, we query. `enable-local-variables' is ignored if you |
| 1087 | run `normal-mode' explicitly." |
| 1088 | (interactive) |
| 1089 | (or find-file (funcall (or default-major-mode 'fundamental-mode))) |
| 1090 | (condition-case err |
| 1091 | (set-auto-mode) |
| 1092 | (error (message "File mode specification error: %s" |
| 1093 | (prin1-to-string err)))) |
| 1094 | (condition-case err |
| 1095 | (let ((enable-local-variables (or (not find-file) |
| 1096 | enable-local-variables))) |
| 1097 | (hack-local-variables)) |
| 1098 | (error (message "File local-variables error: %s" |
| 1099 | (prin1-to-string err))))) |
| 1100 | |
| 1101 | (defvar auto-mode-alist |
| 1102 | '(("\\.te?xt\\'" . text-mode) |
| 1103 | ("\\.c\\'" . c-mode) |
| 1104 | ("\\.h\\'" . c-mode) |
| 1105 | ("\\.tex\\'" . tex-mode) |
| 1106 | ("\\.ltx\\'" . latex-mode) |
| 1107 | ("\\.el\\'" . emacs-lisp-mode) |
| 1108 | ("\\.mm\\'" . nroff-mode) |
| 1109 | ("\\.me\\'" . nroff-mode) |
| 1110 | ("\\.ms\\'" . nroff-mode) |
| 1111 | ("\\.man\\'" . nroff-mode) |
| 1112 | ("\\.scm\\'" . scheme-mode) |
| 1113 | ("\\.l\\'" . lisp-mode) |
| 1114 | ("\\.lisp\\'" . lisp-mode) |
| 1115 | ("\\.f\\'" . fortran-mode) |
| 1116 | ("\\.F\\'" . fortran-mode) |
| 1117 | ("\\.for\\'" . fortran-mode) |
| 1118 | ("\\.p\\'" . pascal-mode) |
| 1119 | ("\\.pas\\'" . pascal-mode) |
| 1120 | ("\\.ad[abs]\\'" . ada-mode) |
| 1121 | ("\\.pl\\'" . perl-mode) |
| 1122 | ("\\.pm\\'" . perl-mode) |
| 1123 | ("\\.s?html?\\'" . html-mode) |
| 1124 | ("\\.cc\\'" . c++-mode) |
| 1125 | ("\\.hh\\'" . c++-mode) |
| 1126 | ("\\.hpp\\'" . c++-mode) |
| 1127 | ("\\.C\\'" . c++-mode) |
| 1128 | ("\\.H\\'" . c++-mode) |
| 1129 | ("\\.cpp\\'" . c++-mode) |
| 1130 | ("\\.cxx\\'" . c++-mode) |
| 1131 | ("\\.hxx\\'" . c++-mode) |
| 1132 | ("\\.c\\+\\+\\'" . c++-mode) |
| 1133 | ("\\.h\\+\\+\\'" . c++-mode) |
| 1134 | ("\\.m\\'" . objc-mode) |
| 1135 | ("\\.java\\'" . java-mode) |
| 1136 | ("\\.mk\\'" . makefile-mode) |
| 1137 | ("\\(M\\|m\\|GNUm\\)akefile\\(.in\\)?\\'" . makefile-mode) |
| 1138 | ;;; Less common extensions come here |
| 1139 | ;;; so more common ones above are found faster. |
| 1140 | ("\\.texinfo\\'" . texinfo-mode) |
| 1141 | ("\\.te?xi\\'" . texinfo-mode) |
| 1142 | ("\\.s\\'" . asm-mode) |
| 1143 | ("\\.S\\'" . asm-mode) |
| 1144 | ("\\.asm\\'" . asm-mode) |
| 1145 | ("ChangeLog\\'" . change-log-mode) |
| 1146 | ("change.log\\'" . change-log-mode) |
| 1147 | ("changelo\\'" . change-log-mode) |
| 1148 | ("ChangeLog.[0-9]+\\'" . change-log-mode) |
| 1149 | ;; for MSDOS and MS-Windows (which are case-insensitive) |
| 1150 | ("changelog\\'" . change-log-mode) |
| 1151 | ("changelog.[0-9]+\\'" . change-log-mode) |
| 1152 | ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode) |
| 1153 | ("\\.scm\\.[0-9]*\\'" . scheme-mode) |
| 1154 | ("\\.[ck]?sh\\'\\|\\.shar\\'\\|/\\.z?profile\\'" . sh-mode) |
| 1155 | ("/\\.\\(bash_profile\\|z?login\\|bash_login\\|z?logout\\)\\'" . sh-mode) |
| 1156 | ("/\\.\\(bash_logout\\|[kz]shrc\\|bashrc\\|t?cshrc\\|esrc\\)\\'" . sh-mode) |
| 1157 | ("/\\.\\([kz]shenv\\|xinitrc\\|startxrc\\|xsession\\)\\'" . sh-mode) |
| 1158 | ;;; The following should come after the ChangeLog pattern |
| 1159 | ;;; for the sake of ChangeLog.1, etc. |
| 1160 | ;;; and after the .scm.[0-9] pattern too. |
| 1161 | ("\\.[12345678]\\'" . nroff-mode) |
| 1162 | ("\\.TeX\\'" . tex-mode) |
| 1163 | ("\\.sty\\'" . latex-mode) |
| 1164 | ("\\.cls\\'" . latex-mode) ;LaTeX 2e class |
| 1165 | ("\\.clo\\'" . latex-mode) ;LaTeX 2e class option |
| 1166 | ("\\.bbl\\'" . latex-mode) |
| 1167 | ("\\.bib\\'" . bibtex-mode) |
| 1168 | ("\\.m4\\'" . m4-mode) |
| 1169 | ("\\.mc\\'" . m4-mode) |
| 1170 | ("\\.mf\\'" . metafont-mode) |
| 1171 | ("\\.mp\\'" . metapost-mode) |
| 1172 | ("\\.article\\'" . text-mode) |
| 1173 | ("\\.letter\\'" . text-mode) |
| 1174 | ("\\.tcl\\'" . tcl-mode) |
| 1175 | ("\\.exp\\'" . tcl-mode) |
| 1176 | ("\\.itcl\\'" . tcl-mode) |
| 1177 | ("\\.itk\\'" . tcl-mode) |
| 1178 | ("\\.icn\\'" . icon-mode) |
| 1179 | ("\\.sim\\'" . simula-mode) |
| 1180 | ("\\.mss\\'" . scribe-mode) |
| 1181 | ("\\.f90\\'" . f90-mode) |
| 1182 | ("\\.lsp\\'" . lisp-mode) |
| 1183 | ("\\.awk\\'" . awk-mode) |
| 1184 | ("\\.prolog\\'" . prolog-mode) |
| 1185 | ("\\.tar\\'" . tar-mode) |
| 1186 | ("\\.\\(arc\\|zip\\|lzh\\|zoo\\|jar\\)\\'" . archive-mode) |
| 1187 | ("\\.\\(ARC\\|ZIP\\|LZH\\|ZOO\\|JAR\\)\\'" . archive-mode) |
| 1188 | ;; Mailer puts message to be edited in |
| 1189 | ;; /tmp/Re.... or Message |
| 1190 | ("\\`/tmp/Re" . text-mode) |
| 1191 | ("/Message[0-9]*\\'" . text-mode) |
| 1192 | ("/drafts/[0-9]+\\'" . mh-letter-mode) |
| 1193 | ;; some news reader is reported to use this |
| 1194 | ("\\`/tmp/fol/" . text-mode) |
| 1195 | ("\\.y\\'" . c-mode) |
| 1196 | ("\\.lex\\'" . c-mode) |
| 1197 | ("\\.oak\\'" . scheme-mode) |
| 1198 | ("\\.sgml?\\'" . sgml-mode) |
| 1199 | ("\\.dtd\\'" . sgml-mode) |
| 1200 | ("\\.ds\\(ss\\)?l\\'" . dsssl-mode) |
| 1201 | ;; .emacs following a directory delimiter |
| 1202 | ;; in Unix, MSDOG or VMS syntax. |
| 1203 | ("[]>:/\\]\\..*emacs\\'" . emacs-lisp-mode) |
| 1204 | ;; _emacs following a directory delimiter |
| 1205 | ;; in MsDos syntax |
| 1206 | ("[:/]_emacs\\'" . emacs-lisp-mode) |
| 1207 | ("\\.ml\\'" . lisp-mode)) |
| 1208 | "\ |
| 1209 | Alist of filename patterns vs corresponding major mode functions. |
| 1210 | Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL). |
| 1211 | \(NON-NIL stands for anything that is not nil; the value does not matter.) |
| 1212 | Visiting a file whose name matches REGEXP specifies FUNCTION as the |
| 1213 | mode function to use. FUNCTION will be called, unless it is nil. |
| 1214 | |
| 1215 | If the element has the form (REGEXP FUNCTION NON-NIL), then after |
| 1216 | calling FUNCTION (if it's not nil), we delete the suffix that matched |
| 1217 | REGEXP and search the list again for another match.") |
| 1218 | |
| 1219 | (defvar interpreter-mode-alist |
| 1220 | '(("perl" . perl-mode) |
| 1221 | ("perl5" . perl-mode) |
| 1222 | ("wish" . tcl-mode) |
| 1223 | ("wishx" . tcl-mode) |
| 1224 | ("tcl" . tcl-mode) |
| 1225 | ("tclsh" . tcl-mode) |
| 1226 | ("awk" . awk-mode) |
| 1227 | ("mawk" . awk-mode) |
| 1228 | ("nawk" . awk-mode) |
| 1229 | ("gawk" . awk-mode) |
| 1230 | ("scm" . scheme-mode) |
| 1231 | ("ash" . sh-mode) |
| 1232 | ("bash" . sh-mode) |
| 1233 | ("csh" . sh-mode) |
| 1234 | ("dtksh" . sh-mode) |
| 1235 | ("es" . sh-mode) |
| 1236 | ("itcsh" . sh-mode) |
| 1237 | ("jsh" . sh-mode) |
| 1238 | ("ksh" . sh-mode) |
| 1239 | ("oash" . sh-mode) |
| 1240 | ("pdksh" . sh-mode) |
| 1241 | ("rc" . sh-mode) |
| 1242 | ("sh" . sh-mode) |
| 1243 | ("sh5" . sh-mode) |
| 1244 | ("tcsh" . sh-mode) |
| 1245 | ("wksh" . sh-mode) |
| 1246 | ("wsh" . sh-mode) |
| 1247 | ("zsh" . sh-mode) |
| 1248 | ("tail" . text-mode) |
| 1249 | ("more" . text-mode) |
| 1250 | ("less" . text-mode) |
| 1251 | ("pg" . text-mode)) |
| 1252 | "Alist mapping interpreter names to major modes. |
| 1253 | This alist applies to files whose first line starts with `#!'. |
| 1254 | Each element looks like (INTERPRETER . MODE). |
| 1255 | The car of each element is compared with |
| 1256 | the name of the interpreter specified in the first line. |
| 1257 | If it matches, mode MODE is selected.") |
| 1258 | |
| 1259 | (defvar inhibit-first-line-modes-regexps '("\\.tar\\'" "\\.tgz\\'") |
| 1260 | "List of regexps; if one matches a file name, don't look for `-*-'.") |
| 1261 | |
| 1262 | (defvar inhibit-first-line-modes-suffixes nil |
| 1263 | "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'. |
| 1264 | When checking `inhibit-first-line-modes-regexps', we first discard |
| 1265 | from the end of the file name anything that matches one of these regexps.") |
| 1266 | |
| 1267 | (defvar user-init-file |
| 1268 | "" ; set by command-line |
| 1269 | "File name including directory of user's initialization file.") |
| 1270 | |
| 1271 | (defun set-auto-mode (&optional just-from-file-name) |
| 1272 | "Select major mode appropriate for current buffer. |
| 1273 | This checks for a -*- mode tag in the buffer's text, |
| 1274 | compares the filename against the entries in `auto-mode-alist', |
| 1275 | or checks the interpreter that runs this file against |
| 1276 | `interpreter-mode-alist'. |
| 1277 | |
| 1278 | It does not check for the `mode:' local variable in the |
| 1279 | Local Variables section of the file; for that, use `hack-local-variables'. |
| 1280 | |
| 1281 | If `enable-local-variables' is nil, this function does not check for a |
| 1282 | -*- mode tag. |
| 1283 | |
| 1284 | If the optional argument JUST-FROM-FILE-NAME is non-nil, |
| 1285 | then we do not set anything but the major mode, |
| 1286 | and we don't even do that unless it would come from the file name." |
| 1287 | ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- |
| 1288 | (let (beg end done modes) |
| 1289 | (save-excursion |
| 1290 | (goto-char (point-min)) |
| 1291 | (skip-chars-forward " \t\n") |
| 1292 | (and enable-local-variables |
| 1293 | ;; Don't look for -*- if this file name matches any |
| 1294 | ;; of the regexps in inhibit-first-line-modes-regexps. |
| 1295 | (let ((temp inhibit-first-line-modes-regexps) |
| 1296 | (name (if buffer-file-name |
| 1297 | (file-name-sans-versions buffer-file-name) |
| 1298 | (buffer-name)))) |
| 1299 | (while (let ((sufs inhibit-first-line-modes-suffixes)) |
| 1300 | (while (and sufs (not (string-match (car sufs) name))) |
| 1301 | (setq sufs (cdr sufs))) |
| 1302 | sufs) |
| 1303 | (setq name (substring name 0 (match-beginning 0)))) |
| 1304 | (while (and temp |
| 1305 | (not (string-match (car temp) name))) |
| 1306 | (setq temp (cdr temp))) |
| 1307 | (not temp)) |
| 1308 | (search-forward "-*-" (save-excursion |
| 1309 | ;; If the file begins with "#!" |
| 1310 | ;; (exec interpreter magic), look |
| 1311 | ;; for mode frobs in the first two |
| 1312 | ;; lines. You cannot necessarily |
| 1313 | ;; put them in the first line of |
| 1314 | ;; such a file without screwing up |
| 1315 | ;; the interpreter invocation. |
| 1316 | (end-of-line (and (looking-at "^#!") 2)) |
| 1317 | (point)) t) |
| 1318 | (progn |
| 1319 | (skip-chars-forward " \t") |
| 1320 | (setq beg (point)) |
| 1321 | (search-forward "-*-" |
| 1322 | (save-excursion (end-of-line) (point)) |
| 1323 | t)) |
| 1324 | (progn |
| 1325 | (forward-char -3) |
| 1326 | (skip-chars-backward " \t") |
| 1327 | (setq end (point)) |
| 1328 | (goto-char beg) |
| 1329 | (if (save-excursion (search-forward ":" end t)) |
| 1330 | ;; Find all specifications for the `mode:' variable |
| 1331 | ;; and execute them left to right. |
| 1332 | (while (let ((case-fold-search t)) |
| 1333 | (or (and (looking-at "mode:") |
| 1334 | (goto-char (match-end 0))) |
| 1335 | (re-search-forward "[ \t;]mode:" end t))) |
| 1336 | (skip-chars-forward " \t") |
| 1337 | (setq beg (point)) |
| 1338 | (if (search-forward ";" end t) |
| 1339 | (forward-char -1) |
| 1340 | (goto-char end)) |
| 1341 | (skip-chars-backward " \t") |
| 1342 | (setq modes (cons (intern (concat (downcase (buffer-substring beg (point))) "-mode")) |
| 1343 | modes))) |
| 1344 | ;; Simple -*-MODE-*- case. |
| 1345 | (setq modes (cons (intern (concat (downcase (buffer-substring beg end)) |
| 1346 | "-mode")) |
| 1347 | modes)))))) |
| 1348 | ;; If we found modes to use, invoke them now, |
| 1349 | ;; outside the save-excursion. |
| 1350 | (when modes |
| 1351 | (unless just-from-file-name |
| 1352 | (mapcar 'funcall (nreverse modes))) |
| 1353 | (setq done t)) |
| 1354 | ;; If we didn't find a mode from a -*- line, try using the file name. |
| 1355 | (if (and (not done) buffer-file-name) |
| 1356 | (let ((name buffer-file-name) |
| 1357 | (keep-going t)) |
| 1358 | ;; Remove backup-suffixes from file name. |
| 1359 | (setq name (file-name-sans-versions name)) |
| 1360 | (while keep-going |
| 1361 | (setq keep-going nil) |
| 1362 | (let ((alist auto-mode-alist) |
| 1363 | (mode nil)) |
| 1364 | ;; Find first matching alist entry. |
| 1365 | (let ((case-fold-search |
| 1366 | (memq system-type '(vax-vms windows-nt)))) |
| 1367 | (while (and (not mode) alist) |
| 1368 | (if (string-match (car (car alist)) name) |
| 1369 | (if (and (consp (cdr (car alist))) |
| 1370 | (nth 2 (car alist))) |
| 1371 | (progn |
| 1372 | (setq mode (car (cdr (car alist))) |
| 1373 | name (substring name 0 (match-beginning 0)) |
| 1374 | keep-going t)) |
| 1375 | (setq mode (cdr (car alist)) |
| 1376 | keep-going nil))) |
| 1377 | (setq alist (cdr alist)))) |
| 1378 | (if mode |
| 1379 | (funcall mode) |
| 1380 | ;; If we can't deduce a mode from the file name, |
| 1381 | ;; look for an interpreter specified in the first line. |
| 1382 | ;; As a special case, allow for things like "#!/bin/env perl", |
| 1383 | ;; which finds the interpreter anywhere in $PATH. |
| 1384 | (let ((interpreter |
| 1385 | (save-excursion |
| 1386 | (goto-char (point-min)) |
| 1387 | (if (looking-at "#![ \t]?\\([^ \t\n]*/bin/env[ \t]\\)?\\([^ \t\n]+\\)") |
| 1388 | (buffer-substring (match-beginning 2) |
| 1389 | (match-end 2)) |
| 1390 | ""))) |
| 1391 | elt) |
| 1392 | ;; Map interpreter name to a mode. |
| 1393 | (setq elt (assoc (file-name-nondirectory interpreter) |
| 1394 | interpreter-mode-alist)) |
| 1395 | (unless just-from-file-name |
| 1396 | (if elt |
| 1397 | (funcall (cdr elt)))))))))))) |
| 1398 | |
| 1399 | (defun hack-local-variables-prop-line () |
| 1400 | ;; Set local variables specified in the -*- line. |
| 1401 | ;; Ignore any specification for `mode:' and `coding:'; |
| 1402 | ;; set-auto-mode should already have handled `mode:', |
| 1403 | ;; set-auto-coding should already have handled `coding:'. |
| 1404 | (save-excursion |
| 1405 | (goto-char (point-min)) |
| 1406 | (let ((result nil) |
| 1407 | (end (save-excursion (end-of-line (and (looking-at "^#!") 2)) (point)))) |
| 1408 | ;; Parse the -*- line into the `result' alist. |
| 1409 | (cond ((not (search-forward "-*-" end t)) |
| 1410 | ;; doesn't have one. |
| 1411 | nil) |
| 1412 | ((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)") |
| 1413 | ;; Simple form: "-*- MODENAME -*-". Already handled. |
| 1414 | nil) |
| 1415 | (t |
| 1416 | ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-' |
| 1417 | ;; (last ";" is optional). |
| 1418 | (save-excursion |
| 1419 | (if (search-forward "-*-" end t) |
| 1420 | (setq end (- (point) 3)) |
| 1421 | (error "-*- not terminated before end of line"))) |
| 1422 | (while (< (point) end) |
| 1423 | (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*") |
| 1424 | (error "malformed -*- line")) |
| 1425 | (goto-char (match-end 0)) |
| 1426 | ;; There used to be a downcase here, |
| 1427 | ;; but the manual didn't say so, |
| 1428 | ;; and people want to set var names that aren't all lc. |
| 1429 | (let ((key (intern (buffer-substring |
| 1430 | (match-beginning 1) |
| 1431 | (match-end 1)))) |
| 1432 | (val (save-restriction |
| 1433 | (narrow-to-region (point) end) |
| 1434 | (read (current-buffer))))) |
| 1435 | ;; It is traditional to ignore |
| 1436 | ;; case when checking for `mode' in set-auto-mode, |
| 1437 | ;; so we must do that here as well. |
| 1438 | ;; That is inconsistent, but we're stuck with it. |
| 1439 | ;; The same can be said for `coding' in set-auto-coding. |
| 1440 | (or (equal (downcase (symbol-name key)) "mode") |
| 1441 | (equal (downcase (symbol-name key)) "coding") |
| 1442 | (setq result (cons (cons key val) result))) |
| 1443 | (skip-chars-forward " \t;"))) |
| 1444 | (setq result (nreverse result)))) |
| 1445 | |
| 1446 | (if (and result |
| 1447 | (or (eq enable-local-variables t) |
| 1448 | (and enable-local-variables |
| 1449 | (save-window-excursion |
| 1450 | (condition-case nil |
| 1451 | (switch-to-buffer (current-buffer)) |
| 1452 | (error |
| 1453 | ;; If we fail to switch in the selected window, |
| 1454 | ;; it is probably a minibuffer. |
| 1455 | ;; So try another window. |
| 1456 | (condition-case nil |
| 1457 | (switch-to-buffer-other-window (current-buffer)) |
| 1458 | (error |
| 1459 | (switch-to-buffer-other-frame (current-buffer)))))) |
| 1460 | (y-or-n-p (format "Set local variables as specified in -*- line of %s? " |
| 1461 | (file-name-nondirectory buffer-file-name))))))) |
| 1462 | (let ((enable-local-eval enable-local-eval)) |
| 1463 | (while result |
| 1464 | (hack-one-local-variable (car (car result)) (cdr (car result))) |
| 1465 | (setq result (cdr result)))))))) |
| 1466 | |
| 1467 | (defvar hack-local-variables-hook nil |
| 1468 | "Normal hook run after processing a file's local variables specs. |
| 1469 | Major modes can use this to examine user-specified local variables |
| 1470 | in order to initialize other data structure based on them.") |
| 1471 | |
| 1472 | (defun hack-local-variables (&optional mode-only) |
| 1473 | "Parse and put into effect this buffer's local variables spec. |
| 1474 | If MODE-ONLY is non-nil, all we do is check whether the major mode |
| 1475 | is specified, returning t if it is specified." |
| 1476 | (unless mode-only |
| 1477 | (hack-local-variables-prop-line)) |
| 1478 | ;; Look for "Local variables:" line in last page. |
| 1479 | (let (mode-specified) |
| 1480 | (save-excursion |
| 1481 | (goto-char (point-max)) |
| 1482 | (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move) |
| 1483 | (if (let ((case-fold-search t)) |
| 1484 | (and (search-forward "Local Variables:" nil t) |
| 1485 | (or (eq enable-local-variables t) |
| 1486 | mode-only |
| 1487 | (and enable-local-variables |
| 1488 | (save-window-excursion |
| 1489 | (switch-to-buffer (current-buffer)) |
| 1490 | (save-excursion |
| 1491 | (beginning-of-line) |
| 1492 | (set-window-start (selected-window) (point))) |
| 1493 | (y-or-n-p (format "Set local variables as specified at end of %s? " |
| 1494 | (if buffer-file-name |
| 1495 | (file-name-nondirectory |
| 1496 | buffer-file-name) |
| 1497 | (concat "buffer " |
| 1498 | (buffer-name)))))))))) |
| 1499 | (let ((continue t) |
| 1500 | prefix prefixlen suffix beg |
| 1501 | mode-specified |
| 1502 | (enable-local-eval enable-local-eval)) |
| 1503 | ;; The prefix is what comes before "local variables:" in its line. |
| 1504 | ;; The suffix is what comes after "local variables:" in its line. |
| 1505 | (skip-chars-forward " \t") |
| 1506 | (or (eolp) |
| 1507 | (setq suffix (buffer-substring (point) |
| 1508 | (progn (end-of-line) (point))))) |
| 1509 | (goto-char (match-beginning 0)) |
| 1510 | (or (bolp) |
| 1511 | (setq prefix |
| 1512 | (buffer-substring (point) |
| 1513 | (progn (beginning-of-line) (point))))) |
| 1514 | |
| 1515 | (if prefix (setq prefixlen (length prefix) |
| 1516 | prefix (regexp-quote prefix))) |
| 1517 | (if suffix (setq suffix (concat (regexp-quote suffix) "$"))) |
| 1518 | (while continue |
| 1519 | ;; Look at next local variable spec. |
| 1520 | (if selective-display (re-search-forward "[\n\C-m]") |
| 1521 | (forward-line 1)) |
| 1522 | ;; Skip the prefix, if any. |
| 1523 | (if prefix |
| 1524 | (if (looking-at prefix) |
| 1525 | (forward-char prefixlen) |
| 1526 | (error "Local variables entry is missing the prefix"))) |
| 1527 | ;; Find the variable name; strip whitespace. |
| 1528 | (skip-chars-forward " \t") |
| 1529 | (setq beg (point)) |
| 1530 | (skip-chars-forward "^:\n") |
| 1531 | (if (eolp) (error "Missing colon in local variables entry")) |
| 1532 | (skip-chars-backward " \t") |
| 1533 | (let* ((str (buffer-substring beg (point))) |
| 1534 | (var (read str)) |
| 1535 | val) |
| 1536 | ;; Setting variable named "end" means end of list. |
| 1537 | (if (string-equal (downcase str) "end") |
| 1538 | (setq continue nil) |
| 1539 | ;; Otherwise read the variable value. |
| 1540 | (skip-chars-forward "^:") |
| 1541 | (forward-char 1) |
| 1542 | (setq val (read (current-buffer))) |
| 1543 | (skip-chars-backward "\n") |
| 1544 | (skip-chars-forward " \t") |
| 1545 | (or (if suffix (looking-at suffix) (eolp)) |
| 1546 | (error "Local variables entry is terminated incorrectly")) |
| 1547 | (if mode-only |
| 1548 | (if (eq var 'mode) |
| 1549 | (setq mode-specified t)) |
| 1550 | ;; Set the variable. "Variables" mode and eval are funny. |
| 1551 | (hack-one-local-variable var val)))))))) |
| 1552 | (unless mode-only |
| 1553 | (run-hooks 'hack-local-variables-hook)) |
| 1554 | mode-specified)) |
| 1555 | |
| 1556 | (defvar ignored-local-variables |
| 1557 | '(enable-local-eval) |
| 1558 | "Variables to be ignored in a file's local variable spec.") |
| 1559 | |
| 1560 | ;; Get confirmation before setting these variables as locals in a file. |
| 1561 | (put 'debugger 'risky-local-variable t) |
| 1562 | (put 'enable-local-eval 'risky-local-variable t) |
| 1563 | (put 'ignored-local-variables 'risky-local-variable t) |
| 1564 | (put 'eval 'risky-local-variable t) |
| 1565 | (put 'file-name-handler-alist 'risky-local-variable t) |
| 1566 | (put 'minor-mode-map-alist 'risky-local-variable t) |
| 1567 | (put 'after-load-alist 'risky-local-variable t) |
| 1568 | (put 'buffer-file-name 'risky-local-variable t) |
| 1569 | (put 'buffer-auto-save-file-name 'risky-local-variable t) |
| 1570 | (put 'buffer-file-truename 'risky-local-variable t) |
| 1571 | (put 'exec-path 'risky-local-variable t) |
| 1572 | (put 'load-path 'risky-local-variable t) |
| 1573 | (put 'exec-directory 'risky-local-variable t) |
| 1574 | (put 'process-environment 'risky-local-variable t) |
| 1575 | (put 'dabbrev-case-fold-search 'risky-local-variable t) |
| 1576 | (put 'dabbrev-case-replace 'risky-local-variable t) |
| 1577 | ;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode. |
| 1578 | (put 'outline-level 'risky-local-variable t) |
| 1579 | (put 'rmail-output-file-alist 'risky-local-variable t) |
| 1580 | |
| 1581 | ;; This one is safe because the user gets to check it before it is used. |
| 1582 | (put 'compile-command 'safe-local-variable t) |
| 1583 | |
| 1584 | (defun hack-one-local-variable-quotep (exp) |
| 1585 | (and (consp exp) (eq (car exp) 'quote) (consp (cdr exp)))) |
| 1586 | |
| 1587 | ;; "Set" one variable in a local variables spec. |
| 1588 | ;; A few variable names are treated specially. |
| 1589 | (defun hack-one-local-variable (var val) |
| 1590 | (cond ((eq var 'mode) |
| 1591 | (funcall (intern (concat (downcase (symbol-name val)) |
| 1592 | "-mode")))) |
| 1593 | ((eq var 'coding) |
| 1594 | ;; We have already handled coding: tag in set-auto-coding. |
| 1595 | nil) |
| 1596 | ((memq var ignored-local-variables) |
| 1597 | nil) |
| 1598 | ;; "Setting" eval means either eval it or do nothing. |
| 1599 | ;; Likewise for setting hook variables. |
| 1600 | ((or (get var 'risky-local-variable) |
| 1601 | (and |
| 1602 | (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$" |
| 1603 | (symbol-name var)) |
| 1604 | (not (get var 'safe-local-variable)))) |
| 1605 | ;; Permit evalling a put of a harmless property. |
| 1606 | ;; if the args do nothing tricky. |
| 1607 | (if (or (and (eq var 'eval) |
| 1608 | (consp val) |
| 1609 | (eq (car val) 'put) |
| 1610 | (hack-one-local-variable-quotep (nth 1 val)) |
| 1611 | (hack-one-local-variable-quotep (nth 2 val)) |
| 1612 | ;; Only allow safe values of lisp-indent-hook; |
| 1613 | ;; not functions. |
| 1614 | (or (numberp (nth 3 val)) |
| 1615 | (equal (nth 3 val) ''defun)) |
| 1616 | (memq (nth 1 (nth 2 val)) |
| 1617 | '(lisp-indent-hook))) |
| 1618 | ;; Permit eval if not root and user says ok. |
| 1619 | (and (not (zerop (user-uid))) |
| 1620 | (or (eq enable-local-eval t) |
| 1621 | (and enable-local-eval |
| 1622 | (save-window-excursion |
| 1623 | (switch-to-buffer (current-buffer)) |
| 1624 | (save-excursion |
| 1625 | (beginning-of-line) |
| 1626 | (set-window-start (selected-window) (point))) |
| 1627 | (setq enable-local-eval |
| 1628 | (y-or-n-p (format "Process `eval' or hook local variables in file %s? " |
| 1629 | (file-name-nondirectory buffer-file-name))))))))) |
| 1630 | (if (eq var 'eval) |
| 1631 | (save-excursion (eval val)) |
| 1632 | (make-local-variable var) |
| 1633 | (set var val)) |
| 1634 | (message "Ignoring `eval:' in file's local variables"))) |
| 1635 | ;; Ordinary variable, really set it. |
| 1636 | (t (make-local-variable var) |
| 1637 | (set var val)))) |
| 1638 | |
| 1639 | \f |
| 1640 | (defcustom change-major-mode-with-file-name t |
| 1641 | "*Non-nil means \\[write-file] should set the major mode from the file name. |
| 1642 | However, the mode will not be changed if |
| 1643 | \(1) a local variables list or the `-*-' line specifies a major mode, or |
| 1644 | \(2) the current major mode is a \"special\" mode, |
| 1645 | \ not suitable for ordinary files, or |
| 1646 | \(3) the new file name does not particularly specify any mode." |
| 1647 | :type 'boolean |
| 1648 | :group 'editing-basics) |
| 1649 | |
| 1650 | (defun set-visited-file-name (filename &optional no-query along-with-file) |
| 1651 | "Change name of file visited in current buffer to FILENAME. |
| 1652 | The next time the buffer is saved it will go in the newly specified file. |
| 1653 | nil or empty string as argument means make buffer not be visiting any file. |
| 1654 | Remember to delete the initial contents of the minibuffer |
| 1655 | if you wish to pass an empty string as the argument. |
| 1656 | |
| 1657 | The optional second argument NO-QUERY, if non-nil, inhibits asking for |
| 1658 | confirmation in the case where another buffer is already visiting FILENAME. |
| 1659 | |
| 1660 | The optional third argument ALONG-WITH-FILE, if non-nil, means that |
| 1661 | the old visited file has been renamed to the new name FILENAME." |
| 1662 | (interactive "FSet visited file name: ") |
| 1663 | (if (buffer-base-buffer) |
| 1664 | (error "An indirect buffer cannot visit a file")) |
| 1665 | (let (truename) |
| 1666 | (if filename |
| 1667 | (setq filename |
| 1668 | (if (string-equal filename "") |
| 1669 | nil |
| 1670 | (expand-file-name filename)))) |
| 1671 | (if filename |
| 1672 | (progn |
| 1673 | (setq truename (file-truename filename)) |
| 1674 | (if find-file-visit-truename |
| 1675 | (setq filename truename)))) |
| 1676 | (let ((buffer (and filename (find-buffer-visiting filename)))) |
| 1677 | (and buffer (not (eq buffer (current-buffer))) |
| 1678 | (not no-query) |
| 1679 | (not (y-or-n-p (message "A buffer is visiting %s; proceed? " |
| 1680 | filename))) |
| 1681 | (error "Aborted"))) |
| 1682 | (or (equal filename buffer-file-name) |
| 1683 | (progn |
| 1684 | (and filename (lock-buffer filename)) |
| 1685 | (unlock-buffer))) |
| 1686 | (setq buffer-file-name filename) |
| 1687 | (if filename ; make buffer name reflect filename. |
| 1688 | (let ((new-name (file-name-nondirectory buffer-file-name))) |
| 1689 | (if (string= new-name "") |
| 1690 | (error "Empty file name")) |
| 1691 | (if (eq system-type 'vax-vms) |
| 1692 | (setq new-name (downcase new-name))) |
| 1693 | (setq default-directory (file-name-directory buffer-file-name)) |
| 1694 | (or (string= new-name (buffer-name)) |
| 1695 | (rename-buffer new-name t)))) |
| 1696 | (setq buffer-backed-up nil) |
| 1697 | (or along-with-file |
| 1698 | (clear-visited-file-modtime)) |
| 1699 | ;; Abbreviate the file names of the buffer. |
| 1700 | (if truename |
| 1701 | (progn |
| 1702 | (setq buffer-file-truename (abbreviate-file-name truename)) |
| 1703 | (if find-file-visit-truename |
| 1704 | (setq buffer-file-name buffer-file-truename)))) |
| 1705 | (setq buffer-file-number |
| 1706 | (if filename |
| 1707 | (nthcdr 10 (file-attributes buffer-file-name)) |
| 1708 | nil))) |
| 1709 | ;; write-file-hooks is normally used for things like ftp-find-file |
| 1710 | ;; that visit things that are not local files as if they were files. |
| 1711 | ;; Changing to visit an ordinary local file instead should flush the hook. |
| 1712 | (kill-local-variable 'write-file-hooks) |
| 1713 | (kill-local-variable 'local-write-file-hooks) |
| 1714 | (kill-local-variable 'revert-buffer-function) |
| 1715 | (kill-local-variable 'backup-inhibited) |
| 1716 | ;; If buffer was read-only because of version control, |
| 1717 | ;; that reason is gone now, so make it writable. |
| 1718 | (if vc-mode |
| 1719 | (setq buffer-read-only nil)) |
| 1720 | (kill-local-variable 'vc-mode) |
| 1721 | ;; Turn off backup files for certain file names. |
| 1722 | ;; Since this is a permanent local, the major mode won't eliminate it. |
| 1723 | (and (not (funcall backup-enable-predicate buffer-file-name)) |
| 1724 | (progn |
| 1725 | (make-local-variable 'backup-inhibited) |
| 1726 | (setq backup-inhibited t))) |
| 1727 | (let ((oauto buffer-auto-save-file-name)) |
| 1728 | ;; If auto-save was not already on, turn it on if appropriate. |
| 1729 | (if (not buffer-auto-save-file-name) |
| 1730 | (and buffer-file-name auto-save-default |
| 1731 | (auto-save-mode t)) |
| 1732 | ;; If auto save is on, start using a new name. |
| 1733 | ;; We deliberately don't rename or delete the old auto save |
| 1734 | ;; for the old visited file name. This is because perhaps |
| 1735 | ;; the user wants to save the new state and then compare with the |
| 1736 | ;; previous state from the auto save file. |
| 1737 | (setq buffer-auto-save-file-name |
| 1738 | (make-auto-save-file-name))) |
| 1739 | ;; Rename the old auto save file if any. |
| 1740 | (and oauto buffer-auto-save-file-name |
| 1741 | (file-exists-p oauto) |
| 1742 | (rename-file oauto buffer-auto-save-file-name t))) |
| 1743 | (and buffer-file-name |
| 1744 | (not along-with-file) |
| 1745 | (set-buffer-modified-p t)) |
| 1746 | ;; Update the major mode, if the file name determines it. |
| 1747 | (condition-case nil |
| 1748 | ;; Don't change the mode if it is special. |
| 1749 | (or (not change-major-mode-with-file-name) |
| 1750 | (get major-mode 'mode-class) |
| 1751 | ;; Don't change the mode if the local variable list specifies it. |
| 1752 | (hack-local-variables t) |
| 1753 | (set-auto-mode t)) |
| 1754 | (error nil))) |
| 1755 | |
| 1756 | (defun write-file (filename &optional confirm) |
| 1757 | "Write current buffer into file FILENAME. |
| 1758 | Makes buffer visit that file, and marks it not modified. |
| 1759 | If the buffer is already visiting a file, you can specify |
| 1760 | a directory name as FILENAME, to write a file of the same |
| 1761 | old name in that directory. |
| 1762 | |
| 1763 | If optional second arg CONFIRM is non-nil, |
| 1764 | ask for confirmation for overwriting an existing file. |
| 1765 | Interactively, confirmation is required unless you supply a prefix argument." |
| 1766 | ;; (interactive "FWrite file: ") |
| 1767 | (interactive |
| 1768 | (list (if buffer-file-name |
| 1769 | (read-file-name "Write file: " |
| 1770 | nil nil nil nil) |
| 1771 | (read-file-name "Write file: " |
| 1772 | (cdr (assq 'default-directory |
| 1773 | (buffer-local-variables))) |
| 1774 | nil nil (buffer-name))) |
| 1775 | (not current-prefix-arg))) |
| 1776 | (or (null filename) (string-equal filename "") |
| 1777 | (progn |
| 1778 | ;; If arg is just a directory, |
| 1779 | ;; use same file name, but in that directory. |
| 1780 | (if (and (file-directory-p filename) buffer-file-name) |
| 1781 | (setq filename (concat (file-name-as-directory filename) |
| 1782 | (file-name-nondirectory buffer-file-name)))) |
| 1783 | (and confirm |
| 1784 | (file-exists-p filename) |
| 1785 | (or (y-or-n-p (format "File `%s' exists; overwrite? " filename)) |
| 1786 | (error "Canceled"))) |
| 1787 | (set-visited-file-name filename (not confirm)))) |
| 1788 | (set-buffer-modified-p t) |
| 1789 | (save-buffer)) |
| 1790 | \f |
| 1791 | (defun backup-buffer () |
| 1792 | "Make a backup of the disk file visited by the current buffer, if appropriate. |
| 1793 | This is normally done before saving the buffer the first time. |
| 1794 | If the value is non-nil, it is the result of `file-modes' on the original |
| 1795 | file; this means that the caller, after saving the buffer, should change |
| 1796 | the modes of the new file to agree with the old modes. |
| 1797 | |
| 1798 | A backup may be done by renaming or by copying; see documentation of |
| 1799 | variable `make-backup-files'. If it's done by renaming, then the file is |
| 1800 | no longer accessible under its old name." |
| 1801 | (if (and make-backup-files (not backup-inhibited) |
| 1802 | (not buffer-backed-up) |
| 1803 | (file-exists-p buffer-file-name) |
| 1804 | (memq (aref (elt (file-attributes buffer-file-name) 8) 0) |
| 1805 | '(?- ?l))) |
| 1806 | (let ((real-file-name buffer-file-name) |
| 1807 | backup-info backupname targets setmodes) |
| 1808 | ;; If specified name is a symbolic link, chase it to the target. |
| 1809 | ;; Thus we make the backups in the directory where the real file is. |
| 1810 | (setq real-file-name (file-chase-links real-file-name)) |
| 1811 | (setq backup-info (find-backup-file-name real-file-name) |
| 1812 | backupname (car backup-info) |
| 1813 | targets (cdr backup-info)) |
| 1814 | ;;; (if (file-directory-p buffer-file-name) |
| 1815 | ;;; (error "Cannot save buffer in directory %s" buffer-file-name)) |
| 1816 | (if backup-info |
| 1817 | (condition-case () |
| 1818 | (let ((delete-old-versions |
| 1819 | ;; If have old versions to maybe delete, |
| 1820 | ;; ask the user to confirm now, before doing anything. |
| 1821 | ;; But don't actually delete til later. |
| 1822 | (and targets |
| 1823 | (or (eq delete-old-versions t) (eq delete-old-versions nil)) |
| 1824 | (or delete-old-versions |
| 1825 | (y-or-n-p (format "Delete excess backup versions of %s? " |
| 1826 | real-file-name)))))) |
| 1827 | ;; Actually write the back up file. |
| 1828 | (condition-case () |
| 1829 | (if (or file-precious-flag |
| 1830 | ; (file-symlink-p buffer-file-name) |
| 1831 | backup-by-copying |
| 1832 | (and backup-by-copying-when-linked |
| 1833 | (> (file-nlinks real-file-name) 1)) |
| 1834 | (and backup-by-copying-when-mismatch |
| 1835 | (let ((attr (file-attributes real-file-name))) |
| 1836 | (or (nth 9 attr) |
| 1837 | (not (file-ownership-preserved-p real-file-name)))))) |
| 1838 | (condition-case () |
| 1839 | (copy-file real-file-name backupname t t) |
| 1840 | (file-error |
| 1841 | ;; If copying fails because file BACKUPNAME |
| 1842 | ;; is not writable, delete that file and try again. |
| 1843 | (if (and (file-exists-p backupname) |
| 1844 | (not (file-writable-p backupname))) |
| 1845 | (delete-file backupname)) |
| 1846 | (copy-file real-file-name backupname t t))) |
| 1847 | ;; rename-file should delete old backup. |
| 1848 | (rename-file real-file-name backupname t) |
| 1849 | (setq setmodes (file-modes backupname))) |
| 1850 | (file-error |
| 1851 | ;; If trouble writing the backup, write it in ~. |
| 1852 | (setq backupname (expand-file-name |
| 1853 | (convert-standard-filename |
| 1854 | "~/%backup%~"))) |
| 1855 | (message "Cannot write backup file; backing up in %s" |
| 1856 | (file-name-nondirectory backupname)) |
| 1857 | (sleep-for 1) |
| 1858 | (condition-case () |
| 1859 | (copy-file real-file-name backupname t t) |
| 1860 | (file-error |
| 1861 | ;; If copying fails because file BACKUPNAME |
| 1862 | ;; is not writable, delete that file and try again. |
| 1863 | (if (and (file-exists-p backupname) |
| 1864 | (not (file-writable-p backupname))) |
| 1865 | (delete-file backupname)) |
| 1866 | (copy-file real-file-name backupname t t))))) |
| 1867 | (setq buffer-backed-up t) |
| 1868 | ;; Now delete the old versions, if desired. |
| 1869 | (if delete-old-versions |
| 1870 | (while targets |
| 1871 | (condition-case () |
| 1872 | (delete-file (car targets)) |
| 1873 | (file-error nil)) |
| 1874 | (setq targets (cdr targets)))) |
| 1875 | setmodes) |
| 1876 | (file-error nil)))))) |
| 1877 | |
| 1878 | (defun file-name-sans-versions (name &optional keep-backup-version) |
| 1879 | "Return FILENAME sans backup versions or strings. |
| 1880 | This is a separate procedure so your site-init or startup file can |
| 1881 | redefine it. |
| 1882 | If the optional argument KEEP-BACKUP-VERSION is non-nil, |
| 1883 | we do not remove backup version numbers, only true file version numbers." |
| 1884 | (let ((handler (find-file-name-handler name 'file-name-sans-versions))) |
| 1885 | (if handler |
| 1886 | (funcall handler 'file-name-sans-versions name keep-backup-version) |
| 1887 | (substring name 0 |
| 1888 | (if (eq system-type 'vax-vms) |
| 1889 | ;; VMS version number is (a) semicolon, optional |
| 1890 | ;; sign, zero or more digits or (b) period, option |
| 1891 | ;; sign, zero or more digits, provided this is the |
| 1892 | ;; second period encountered outside of the |
| 1893 | ;; device/directory part of the file name. |
| 1894 | (or (string-match ";[-+]?[0-9]*\\'" name) |
| 1895 | (if (string-match "\\.[^]>:]*\\(\\.[-+]?[0-9]*\\)\\'" |
| 1896 | name) |
| 1897 | (match-beginning 1)) |
| 1898 | (length name)) |
| 1899 | (if keep-backup-version |
| 1900 | (length name) |
| 1901 | (or (string-match "\\.~[0-9.]+~\\'" name) |
| 1902 | (string-match "~\\'" name) |
| 1903 | (length name)))))))) |
| 1904 | |
| 1905 | (defun file-ownership-preserved-p (file) |
| 1906 | "Returns t if deleting FILE and rewriting it would preserve the owner." |
| 1907 | (let ((handler (find-file-name-handler file 'file-ownership-preserved-p))) |
| 1908 | (if handler |
| 1909 | (funcall handler 'file-ownership-preserved-p file) |
| 1910 | (let ((attributes (file-attributes file))) |
| 1911 | ;; Return t if the file doesn't exist, since it's true that no |
| 1912 | ;; information would be lost by an (attempted) delete and create. |
| 1913 | (or (null attributes) |
| 1914 | (= (nth 2 attributes) (user-uid))))))) |
| 1915 | |
| 1916 | (defun file-name-sans-extension (filename) |
| 1917 | "Return FILENAME sans final \"extension\". |
| 1918 | The extension, in a file name, is the part that follows the last `.'." |
| 1919 | (save-match-data |
| 1920 | (let ((file (file-name-sans-versions (file-name-nondirectory filename))) |
| 1921 | directory) |
| 1922 | (if (string-match "\\.[^.]*\\'" file) |
| 1923 | (if (setq directory (file-name-directory filename)) |
| 1924 | (expand-file-name (substring file 0 (match-beginning 0)) |
| 1925 | directory) |
| 1926 | (substring file 0 (match-beginning 0))) |
| 1927 | filename)))) |
| 1928 | |
| 1929 | (defun file-name-extension (filename &optional period) |
| 1930 | "Return FILENAME's final \"extension\". |
| 1931 | The extension, in a file name, is the part that follows the last `.'. |
| 1932 | Return nil for extensionless file names such as `foo'. |
| 1933 | Return the empty string for file names such as `foo.'. |
| 1934 | |
| 1935 | If PERIOD is non-nil, then the returned value includes the period |
| 1936 | that delimits the extension, and if FILENAME has no extension, |
| 1937 | the value is \"\"." |
| 1938 | (save-match-data |
| 1939 | (let ((file (file-name-sans-versions (file-name-nondirectory filename)))) |
| 1940 | (if (string-match "\\.[^.]*\\'" file) |
| 1941 | (substring file (+ (match-beginning 0) (if period 0 1))) |
| 1942 | (if period |
| 1943 | ""))))) |
| 1944 | |
| 1945 | (defun make-backup-file-name (file) |
| 1946 | "Create the non-numeric backup file name for FILE. |
| 1947 | This is a separate function so you can redefine it for customization." |
| 1948 | (if (and (eq system-type 'ms-dos) |
| 1949 | (not (msdos-long-file-names))) |
| 1950 | (let ((fn (file-name-nondirectory file))) |
| 1951 | (concat (file-name-directory file) |
| 1952 | (or |
| 1953 | (and (string-match "\\`[^.]+\\'" fn) |
| 1954 | (concat (match-string 0 fn) ".~")) |
| 1955 | (and (string-match "\\`[^.]+\\.\\(..?\\)?" fn) |
| 1956 | (concat (match-string 0 fn) "~"))))) |
| 1957 | (concat file "~"))) |
| 1958 | |
| 1959 | (defun backup-file-name-p (file) |
| 1960 | "Return non-nil if FILE is a backup file name (numeric or not). |
| 1961 | This is a separate function so you can redefine it for customization. |
| 1962 | You may need to redefine `file-name-sans-versions' as well." |
| 1963 | (string-match "~\\'" file)) |
| 1964 | |
| 1965 | (defvar backup-extract-version-start) |
| 1966 | |
| 1967 | ;; This is used in various files. |
| 1968 | ;; The usage of bv-length is not very clean, |
| 1969 | ;; but I can't see a good alternative, |
| 1970 | ;; so as of now I am leaving it alone. |
| 1971 | (defun backup-extract-version (fn) |
| 1972 | "Given the name of a numeric backup file, return the backup number. |
| 1973 | Uses the free variable `backup-extract-version-start', whose value should be |
| 1974 | the index in the name where the version number begins." |
| 1975 | (if (and (string-match "[0-9]+~$" fn backup-extract-version-start) |
| 1976 | (= (match-beginning 0) backup-extract-version-start)) |
| 1977 | (string-to-int (substring fn backup-extract-version-start -1)) |
| 1978 | 0)) |
| 1979 | |
| 1980 | ;; I believe there is no need to alter this behavior for VMS; |
| 1981 | ;; since backup files are not made on VMS, it should not get called. |
| 1982 | (defun find-backup-file-name (fn) |
| 1983 | "Find a file name for a backup file, and suggestions for deletions. |
| 1984 | Value is a list whose car is the name for the backup file |
| 1985 | and whose cdr is a list of old versions to consider deleting now. |
| 1986 | If the value is nil, don't make a backup." |
| 1987 | (let ((handler (find-file-name-handler fn 'find-backup-file-name))) |
| 1988 | ;; Run a handler for this function so that ange-ftp can refuse to do it. |
| 1989 | (if handler |
| 1990 | (funcall handler 'find-backup-file-name fn) |
| 1991 | (if (eq version-control 'never) |
| 1992 | (list (make-backup-file-name fn)) |
| 1993 | (let* ((base-versions (concat (file-name-nondirectory fn) ".~")) |
| 1994 | (backup-extract-version-start (length base-versions)) |
| 1995 | possibilities |
| 1996 | (versions nil) |
| 1997 | (high-water-mark 0) |
| 1998 | (deserve-versions-p nil) |
| 1999 | (number-to-delete 0)) |
| 2000 | (condition-case () |
| 2001 | (setq possibilities (file-name-all-completions |
| 2002 | base-versions |
| 2003 | (file-name-directory fn)) |
| 2004 | versions (sort (mapcar |
| 2005 | (function backup-extract-version) |
| 2006 | possibilities) |
| 2007 | '<) |
| 2008 | high-water-mark (apply 'max 0 versions) |
| 2009 | deserve-versions-p (or version-control |
| 2010 | (> high-water-mark 0)) |
| 2011 | number-to-delete (- (length versions) |
| 2012 | kept-old-versions kept-new-versions -1)) |
| 2013 | (file-error |
| 2014 | (setq possibilities nil))) |
| 2015 | (if (not deserve-versions-p) |
| 2016 | (list (make-backup-file-name fn)) |
| 2017 | (cons (concat fn ".~" (int-to-string (1+ high-water-mark)) "~") |
| 2018 | (if (and (> number-to-delete 0) |
| 2019 | ;; Delete nothing if there is overflow |
| 2020 | ;; in the number of versions to keep. |
| 2021 | (>= (+ kept-new-versions kept-old-versions -1) 0)) |
| 2022 | (mapcar (function (lambda (n) |
| 2023 | (concat fn ".~" (int-to-string n) "~"))) |
| 2024 | (let ((v (nthcdr kept-old-versions versions))) |
| 2025 | (rplacd (nthcdr (1- number-to-delete) v) ()) |
| 2026 | v)))))))))) |
| 2027 | |
| 2028 | (defun file-nlinks (filename) |
| 2029 | "Return number of names file FILENAME has." |
| 2030 | (car (cdr (file-attributes filename)))) |
| 2031 | |
| 2032 | (defun file-relative-name (filename &optional directory) |
| 2033 | "Convert FILENAME to be relative to DIRECTORY (default: default-directory). |
| 2034 | This function returns a relative file name which is equivalent to FILENAME |
| 2035 | when used with that default directory as the default. |
| 2036 | If this is impossible (which can happen on MSDOS and Windows |
| 2037 | when the file name and directory use different drive names) |
| 2038 | then it returns FILENAME." |
| 2039 | (save-match-data |
| 2040 | (let ((fname (expand-file-name filename))) |
| 2041 | (setq directory (file-name-as-directory |
| 2042 | (expand-file-name (or directory default-directory)))) |
| 2043 | ;; On Microsoft OSes, if FILENAME and DIRECTORY have different |
| 2044 | ;; drive names, they can't be relative, so return the absolute name. |
| 2045 | (if (and (or (eq system-type 'ms-dos) |
| 2046 | (eq system-type 'windows-nt)) |
| 2047 | (not (string-equal (substring fname 0 2) |
| 2048 | (substring directory 0 2)))) |
| 2049 | filename |
| 2050 | (let ((ancestor ".") |
| 2051 | (fname-dir (file-name-as-directory fname))) |
| 2052 | (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir)) |
| 2053 | (not (string-match (concat "^" (regexp-quote directory)) fname))) |
| 2054 | (setq directory (file-name-directory (substring directory 0 -1)) |
| 2055 | ancestor (if (equal ancestor ".") |
| 2056 | ".." |
| 2057 | (concat "../" ancestor)))) |
| 2058 | ;; Now ancestor is empty, or .., or ../.., etc. |
| 2059 | (if (string-match (concat "^" (regexp-quote directory)) fname) |
| 2060 | ;; We matched within FNAME's directory part. |
| 2061 | ;; Add the rest of FNAME onto ANCESTOR. |
| 2062 | (let ((rest (substring fname (match-end 0)))) |
| 2063 | (if (and (equal ancestor ".") |
| 2064 | (not (equal rest ""))) |
| 2065 | ;; But don't bother with ANCESTOR if it would give us `./'. |
| 2066 | rest |
| 2067 | (concat (file-name-as-directory ancestor) rest))) |
| 2068 | ;; We matched FNAME's directory equivalent. |
| 2069 | ancestor)))))) |
| 2070 | \f |
| 2071 | (defun save-buffer (&optional args) |
| 2072 | "Save current buffer in visited file if modified. Versions described below. |
| 2073 | By default, makes the previous version into a backup file |
| 2074 | if previously requested or if this is the first save. |
| 2075 | With 1 \\[universal-argument], marks this version |
| 2076 | to become a backup when the next save is done. |
| 2077 | With 2 \\[universal-argument]'s, |
| 2078 | unconditionally makes the previous version into a backup file. |
| 2079 | With 3 \\[universal-argument]'s, marks this version |
| 2080 | to become a backup when the next save is done, |
| 2081 | and unconditionally makes the previous version into a backup file. |
| 2082 | |
| 2083 | With argument of 0, never makes the previous version into a backup file. |
| 2084 | |
| 2085 | If a file's name is FOO, the names of its numbered backup versions are |
| 2086 | FOO.~i~ for various integers i. A non-numbered backup file is called FOO~. |
| 2087 | Numeric backups (rather than FOO~) will be made if value of |
| 2088 | `version-control' is not the atom `never' and either there are already |
| 2089 | numeric versions of the file being backed up, or `version-control' is |
| 2090 | non-nil. |
| 2091 | We don't want excessive versions piling up, so there are variables |
| 2092 | `kept-old-versions', which tells Emacs how many oldest versions to keep, |
| 2093 | and `kept-new-versions', which tells how many newest versions to keep. |
| 2094 | Defaults are 2 old versions and 2 new. |
| 2095 | `dired-kept-versions' controls dired's clean-directory (.) command. |
| 2096 | If `delete-old-versions' is nil, system will query user |
| 2097 | before trimming versions. Otherwise it does it silently." |
| 2098 | (interactive "p") |
| 2099 | (let ((modp (buffer-modified-p)) |
| 2100 | (large (> (buffer-size) 50000)) |
| 2101 | (make-backup-files (or (and make-backup-files (not (eq args 0))) |
| 2102 | (memq args '(16 64))))) |
| 2103 | (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) |
| 2104 | (if (and modp large) (message "Saving file %s..." (buffer-file-name))) |
| 2105 | (basic-save-buffer) |
| 2106 | (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) |
| 2107 | |
| 2108 | (defun delete-auto-save-file-if-necessary (&optional force) |
| 2109 | "Delete auto-save file for current buffer if `delete-auto-save-files' is t. |
| 2110 | Normally delete only if the file was written by this Emacs since |
| 2111 | the last real save, but optional arg FORCE non-nil means delete anyway." |
| 2112 | (and buffer-auto-save-file-name delete-auto-save-files |
| 2113 | (not (string= buffer-file-name buffer-auto-save-file-name)) |
| 2114 | (or force (recent-auto-save-p)) |
| 2115 | (progn |
| 2116 | (condition-case () |
| 2117 | (delete-file buffer-auto-save-file-name) |
| 2118 | (file-error nil)) |
| 2119 | (set-buffer-auto-saved)))) |
| 2120 | |
| 2121 | (defvar after-save-hook nil |
| 2122 | "Normal hook that is run after a buffer is saved to its file.") |
| 2123 | |
| 2124 | (defun basic-save-buffer () |
| 2125 | "Save the current buffer in its visited file, if it has been modified. |
| 2126 | After saving the buffer, run `after-save-hook'." |
| 2127 | (interactive) |
| 2128 | (save-excursion |
| 2129 | ;; In an indirect buffer, save its base buffer instead. |
| 2130 | (if (buffer-base-buffer) |
| 2131 | (set-buffer (buffer-base-buffer))) |
| 2132 | (if (buffer-modified-p) |
| 2133 | (let ((recent-save (recent-auto-save-p)) |
| 2134 | setmodes tempsetmodes) |
| 2135 | ;; On VMS, rename file and buffer to get rid of version number. |
| 2136 | (if (and (eq system-type 'vax-vms) |
| 2137 | (not (string= buffer-file-name |
| 2138 | (file-name-sans-versions buffer-file-name)))) |
| 2139 | (let (buffer-new-name) |
| 2140 | ;; Strip VMS version number before save. |
| 2141 | (setq buffer-file-name |
| 2142 | (file-name-sans-versions buffer-file-name)) |
| 2143 | ;; Construct a (unique) buffer name to correspond. |
| 2144 | (let ((buf (create-file-buffer (downcase buffer-file-name)))) |
| 2145 | (setq buffer-new-name (buffer-name buf)) |
| 2146 | (kill-buffer buf)) |
| 2147 | (rename-buffer buffer-new-name))) |
| 2148 | ;; If buffer has no file name, ask user for one. |
| 2149 | (or buffer-file-name |
| 2150 | (let ((filename |
| 2151 | (expand-file-name |
| 2152 | (read-file-name "File to save in: ") nil))) |
| 2153 | (and (file-exists-p filename) |
| 2154 | (or (y-or-n-p (format "File `%s' exists; overwrite? " |
| 2155 | filename)) |
| 2156 | (error "Canceled"))) |
| 2157 | (set-visited-file-name filename))) |
| 2158 | (or (verify-visited-file-modtime (current-buffer)) |
| 2159 | (not (file-exists-p buffer-file-name)) |
| 2160 | (yes-or-no-p |
| 2161 | (format "%s has changed since visited or saved. Save anyway? " |
| 2162 | (file-name-nondirectory buffer-file-name))) |
| 2163 | (error "Save not confirmed")) |
| 2164 | (save-restriction |
| 2165 | (widen) |
| 2166 | (and (> (point-max) 1) |
| 2167 | (/= (char-after (1- (point-max))) ?\n) |
| 2168 | (not (and (eq selective-display t) |
| 2169 | (= (char-after (1- (point-max))) ?\r))) |
| 2170 | (or (eq require-final-newline t) |
| 2171 | (and require-final-newline |
| 2172 | (y-or-n-p |
| 2173 | (format "Buffer %s does not end in newline. Add one? " |
| 2174 | (buffer-name))))) |
| 2175 | (save-excursion |
| 2176 | (goto-char (point-max)) |
| 2177 | (insert ?\n))) |
| 2178 | (or (run-hook-with-args-until-success 'write-contents-hooks) |
| 2179 | (run-hook-with-args-until-success 'local-write-file-hooks) |
| 2180 | (run-hook-with-args-until-success 'write-file-hooks) |
| 2181 | ;; If a hook returned t, file is already "written". |
| 2182 | ;; Otherwise, write it the usual way now. |
| 2183 | (setq setmodes (basic-save-buffer-1))) |
| 2184 | ;; Now we have saved the current buffer. Let's make sure |
| 2185 | ;; that buffer-file-coding-system is fixed to what |
| 2186 | ;; actually used for saving by binding it locally. |
| 2187 | (setq buffer-file-coding-system last-coding-system-used) |
| 2188 | (setq buffer-file-number |
| 2189 | (nthcdr 10 (file-attributes buffer-file-name))) |
| 2190 | (if setmodes |
| 2191 | (condition-case () |
| 2192 | (set-file-modes buffer-file-name setmodes) |
| 2193 | (error nil)))) |
| 2194 | ;; If the auto-save file was recent before this command, |
| 2195 | ;; delete it now. |
| 2196 | (delete-auto-save-file-if-necessary recent-save) |
| 2197 | ;; Support VC `implicit' locking. |
| 2198 | (vc-after-save) |
| 2199 | (run-hooks 'after-save-hook)) |
| 2200 | (message "(No changes need to be saved)")))) |
| 2201 | |
| 2202 | ;; This does the "real job" of writing a buffer into its visited file |
| 2203 | ;; and making a backup file. This is what is normally done |
| 2204 | ;; but inhibited if one of write-file-hooks returns non-nil. |
| 2205 | ;; It returns a value to store in setmodes. |
| 2206 | (defun basic-save-buffer-1 () |
| 2207 | (let (tempsetmodes setmodes) |
| 2208 | (if (not (file-writable-p buffer-file-name)) |
| 2209 | (let ((dir (file-name-directory buffer-file-name))) |
| 2210 | (if (not (file-directory-p dir)) |
| 2211 | (if (file-exists-p dir) |
| 2212 | (error "%s is not a directory" dir) |
| 2213 | (error "%s: no such directory" buffer-file-name)) |
| 2214 | (if (not (file-exists-p buffer-file-name)) |
| 2215 | (error "Directory %s write-protected" dir) |
| 2216 | (if (yes-or-no-p |
| 2217 | (format "File %s is write-protected; try to save anyway? " |
| 2218 | (file-name-nondirectory |
| 2219 | buffer-file-name))) |
| 2220 | (setq tempsetmodes t) |
| 2221 | (error "Attempt to save to a file which you aren't allowed to write")))))) |
| 2222 | (or buffer-backed-up |
| 2223 | (setq setmodes (backup-buffer))) |
| 2224 | (let ((dir (file-name-directory buffer-file-name))) |
| 2225 | (if (and file-precious-flag |
| 2226 | (file-writable-p dir)) |
| 2227 | ;; If file is precious, write temp name, then rename it. |
| 2228 | ;; This requires write access to the containing dir, |
| 2229 | ;; which is why we don't try it if we don't have that access. |
| 2230 | (let ((realname buffer-file-name) |
| 2231 | tempname temp nogood i succeed |
| 2232 | (old-modtime (visited-file-modtime))) |
| 2233 | (setq i 0) |
| 2234 | (setq nogood t) |
| 2235 | ;; Find the temporary name to write under. |
| 2236 | (while nogood |
| 2237 | (setq tempname (format |
| 2238 | (if (and (eq system-type 'ms-dos) |
| 2239 | (not (msdos-long-file-names))) |
| 2240 | "%s#%d.tm#" ; MSDOS limits files to 8+3 |
| 2241 | "%s#tmp#%d") |
| 2242 | dir i)) |
| 2243 | (setq nogood (file-exists-p tempname)) |
| 2244 | (setq i (1+ i))) |
| 2245 | (unwind-protect |
| 2246 | (progn (clear-visited-file-modtime) |
| 2247 | (write-region (point-min) (point-max) |
| 2248 | tempname nil realname |
| 2249 | buffer-file-truename) |
| 2250 | (setq succeed t)) |
| 2251 | ;; If writing the temp file fails, |
| 2252 | ;; delete the temp file. |
| 2253 | (or succeed |
| 2254 | (progn |
| 2255 | (delete-file tempname) |
| 2256 | (set-visited-file-modtime old-modtime)))) |
| 2257 | ;; Since we have created an entirely new file |
| 2258 | ;; and renamed it, make sure it gets the |
| 2259 | ;; right permission bits set. |
| 2260 | (setq setmodes (file-modes buffer-file-name)) |
| 2261 | ;; We succeeded in writing the temp file, |
| 2262 | ;; so rename it. |
| 2263 | (rename-file tempname buffer-file-name t)) |
| 2264 | ;; If file not writable, see if we can make it writable |
| 2265 | ;; temporarily while we write it. |
| 2266 | ;; But no need to do so if we have just backed it up |
| 2267 | ;; (setmodes is set) because that says we're superseding. |
| 2268 | (cond ((and tempsetmodes (not setmodes)) |
| 2269 | ;; Change the mode back, after writing. |
| 2270 | (setq setmodes (file-modes buffer-file-name)) |
| 2271 | (set-file-modes buffer-file-name 511))) |
| 2272 | (write-region (point-min) (point-max) |
| 2273 | buffer-file-name nil t buffer-file-truename))) |
| 2274 | setmodes)) |
| 2275 | |
| 2276 | (defun save-some-buffers (&optional arg exiting) |
| 2277 | "Save some modified file-visiting buffers. Asks user about each one. |
| 2278 | Optional argument (the prefix) non-nil means save all with no questions. |
| 2279 | Optional second argument EXITING means ask about certain non-file buffers |
| 2280 | as well as about file buffers." |
| 2281 | (interactive "P") |
| 2282 | (save-window-excursion |
| 2283 | (let* ((queried nil) |
| 2284 | (files-done |
| 2285 | (map-y-or-n-p |
| 2286 | (function |
| 2287 | (lambda (buffer) |
| 2288 | (and (buffer-modified-p buffer) |
| 2289 | (not (buffer-base-buffer buffer)) |
| 2290 | (or |
| 2291 | (buffer-file-name buffer) |
| 2292 | (and exiting |
| 2293 | (progn |
| 2294 | (set-buffer buffer) |
| 2295 | (and buffer-offer-save (> (buffer-size) 0))))) |
| 2296 | (if arg |
| 2297 | t |
| 2298 | (setq queried t) |
| 2299 | (if (buffer-file-name buffer) |
| 2300 | (format "Save file %s? " |
| 2301 | (buffer-file-name buffer)) |
| 2302 | (format "Save buffer %s? " |
| 2303 | (buffer-name buffer))))))) |
| 2304 | (function |
| 2305 | (lambda (buffer) |
| 2306 | (set-buffer buffer) |
| 2307 | (save-buffer))) |
| 2308 | (buffer-list) |
| 2309 | '("buffer" "buffers" "save") |
| 2310 | (list (list ?\C-r (lambda (buf) |
| 2311 | (view-buffer buf |
| 2312 | (function |
| 2313 | (lambda (ignore) |
| 2314 | (exit-recursive-edit)))) |
| 2315 | (recursive-edit) |
| 2316 | ;; Return nil to ask about BUF again. |
| 2317 | nil) |
| 2318 | "display the current buffer")))) |
| 2319 | (abbrevs-done |
| 2320 | (and save-abbrevs abbrevs-changed |
| 2321 | (progn |
| 2322 | (if (or arg |
| 2323 | (y-or-n-p (format "Save abbrevs in %s? " |
| 2324 | abbrev-file-name))) |
| 2325 | (write-abbrev-file nil)) |
| 2326 | ;; Don't keep bothering user if he says no. |
| 2327 | (setq abbrevs-changed nil) |
| 2328 | t)))) |
| 2329 | (or queried (> files-done 0) abbrevs-done |
| 2330 | (message "(No files need saving)"))))) |
| 2331 | \f |
| 2332 | (defun not-modified (&optional arg) |
| 2333 | "Mark current buffer as unmodified, not needing to be saved. |
| 2334 | With prefix arg, mark buffer as modified, so \\[save-buffer] will save. |
| 2335 | |
| 2336 | It is not a good idea to use this function in Lisp programs, because it |
| 2337 | prints a message in the minibuffer. Instead, use `set-buffer-modified-p'." |
| 2338 | (interactive "P") |
| 2339 | (message (if arg "Modification-flag set" |
| 2340 | "Modification-flag cleared")) |
| 2341 | (set-buffer-modified-p arg)) |
| 2342 | |
| 2343 | (defun toggle-read-only (&optional arg) |
| 2344 | "Change whether this buffer is visiting its file read-only. |
| 2345 | With arg, set read-only iff arg is positive. |
| 2346 | If visiting file read-only and `view-read-only' is non-nil, enter view mode." |
| 2347 | (interactive "P") |
| 2348 | (cond |
| 2349 | ((and arg (if (> (prefix-numeric-value arg) 0) buffer-read-only |
| 2350 | (not buffer-read-only))) ; If buffer-read-only is set correctly, |
| 2351 | nil) ; do nothing. |
| 2352 | ;; Toggle. |
| 2353 | ((and buffer-read-only view-mode) |
| 2354 | (View-exit-and-edit)) ; Must leave view mode. |
| 2355 | ((and (not buffer-read-only) view-read-only |
| 2356 | (not (eq (get major-mode 'mode-class) 'special))) |
| 2357 | (view-mode-enter)) |
| 2358 | (t (setq buffer-read-only (not buffer-read-only)) |
| 2359 | (force-mode-line-update)))) |
| 2360 | |
| 2361 | (defun insert-file (filename) |
| 2362 | "Insert contents of file FILENAME into buffer after point. |
| 2363 | Set mark after the inserted text. |
| 2364 | |
| 2365 | This function is meant for the user to run interactively. |
| 2366 | Don't call it from programs! Use `insert-file-contents' instead. |
| 2367 | \(Its calling sequence is different; see its documentation)." |
| 2368 | (interactive "*fInsert file: ") |
| 2369 | (if (file-directory-p filename) |
| 2370 | (signal 'file-error (list "Opening input file" "file is a directory" |
| 2371 | filename))) |
| 2372 | (let ((tem (insert-file-contents filename))) |
| 2373 | (push-mark (+ (point) (car (cdr tem)))))) |
| 2374 | |
| 2375 | (defun append-to-file (start end filename) |
| 2376 | "Append the contents of the region to the end of file FILENAME. |
| 2377 | When called from a function, expects three arguments, |
| 2378 | START, END and FILENAME. START and END are buffer positions |
| 2379 | saying what text to write." |
| 2380 | (interactive "r\nFAppend to file: ") |
| 2381 | (write-region start end filename t)) |
| 2382 | |
| 2383 | (defun file-newest-backup (filename) |
| 2384 | "Return most recent backup file for FILENAME or nil if no backups exist." |
| 2385 | (let* ((filename (expand-file-name filename)) |
| 2386 | (file (file-name-nondirectory filename)) |
| 2387 | (dir (file-name-directory filename)) |
| 2388 | (comp (file-name-all-completions file dir)) |
| 2389 | (newest nil) |
| 2390 | tem) |
| 2391 | (while comp |
| 2392 | (setq tem (car comp) |
| 2393 | comp (cdr comp)) |
| 2394 | (cond ((and (backup-file-name-p tem) |
| 2395 | (string= (file-name-sans-versions tem) file)) |
| 2396 | (setq tem (concat dir tem)) |
| 2397 | (if (or (null newest) |
| 2398 | (file-newer-than-file-p tem newest)) |
| 2399 | (setq newest tem))))) |
| 2400 | newest)) |
| 2401 | |
| 2402 | (defun rename-uniquely () |
| 2403 | "Rename current buffer to a similar name not already taken. |
| 2404 | This function is useful for creating multiple shell process buffers |
| 2405 | or multiple mail buffers, etc." |
| 2406 | (interactive) |
| 2407 | (save-match-data |
| 2408 | (let* ((base-name (if (and (string-match "<[0-9]+>\\'" (buffer-name)) |
| 2409 | (not (and buffer-file-name |
| 2410 | (string= (buffer-name) |
| 2411 | (file-name-nondirectory |
| 2412 | buffer-file-name))))) |
| 2413 | ;; If the existing buffer name has a <NNN>, |
| 2414 | ;; which isn't part of the file name (if any), |
| 2415 | ;; then get rid of that. |
| 2416 | (substring (buffer-name) 0 (match-beginning 0)) |
| 2417 | (buffer-name))) |
| 2418 | (new-buf (generate-new-buffer base-name)) |
| 2419 | (name (buffer-name new-buf))) |
| 2420 | (kill-buffer new-buf) |
| 2421 | (rename-buffer name) |
| 2422 | (force-mode-line-update)))) |
| 2423 | |
| 2424 | (defun make-directory (dir &optional parents) |
| 2425 | "Create the directory DIR and any nonexistent parent dirs. |
| 2426 | Interactively, the default choice of directory to create |
| 2427 | is the current default directory for file names. |
| 2428 | That is useful when you have visited a file in a nonexistent directory. |
| 2429 | |
| 2430 | Noninteractively, the second (optional) argument PARENTS says whether |
| 2431 | to create parent directories if they don't exist." |
| 2432 | (interactive |
| 2433 | (list (read-file-name "Make directory: " default-directory default-directory |
| 2434 | nil nil) |
| 2435 | t)) |
| 2436 | (let ((handler (find-file-name-handler dir 'make-directory))) |
| 2437 | (if handler |
| 2438 | (funcall handler 'make-directory dir parents) |
| 2439 | (if (not parents) |
| 2440 | (make-directory-internal dir) |
| 2441 | (let ((dir (directory-file-name (expand-file-name dir))) |
| 2442 | create-list) |
| 2443 | (while (not (file-exists-p dir)) |
| 2444 | (setq create-list (cons dir create-list) |
| 2445 | dir (directory-file-name (file-name-directory dir)))) |
| 2446 | (while create-list |
| 2447 | (make-directory-internal (car create-list)) |
| 2448 | (setq create-list (cdr create-list)))))))) |
| 2449 | \f |
| 2450 | (put 'revert-buffer-function 'permanent-local t) |
| 2451 | (defvar revert-buffer-function nil |
| 2452 | "Function to use to revert this buffer, or nil to do the default. |
| 2453 | The function receives two arguments IGNORE-AUTO and NOCONFIRM, |
| 2454 | which are the arguments that `revert-buffer' received.") |
| 2455 | |
| 2456 | (put 'revert-buffer-insert-file-contents-function 'permanent-local t) |
| 2457 | (defvar revert-buffer-insert-file-contents-function nil |
| 2458 | "Function to use to insert contents when reverting this buffer. |
| 2459 | Gets two args, first the nominal file name to use, |
| 2460 | and second, t if reading the auto-save file.") |
| 2461 | |
| 2462 | (defvar before-revert-hook nil |
| 2463 | "Normal hook for `revert-buffer' to run before reverting. |
| 2464 | If `revert-buffer-function' is used to override the normal revert |
| 2465 | mechanism, this hook is not used.") |
| 2466 | |
| 2467 | (defvar after-revert-hook nil |
| 2468 | "Normal hook for `revert-buffer' to run after reverting. |
| 2469 | Note that the hook value that it runs is the value that was in effect |
| 2470 | before reverting; that makes a difference if you have buffer-local |
| 2471 | hook functions. |
| 2472 | |
| 2473 | If `revert-buffer-function' is used to override the normal revert |
| 2474 | mechanism, this hook is not used.") |
| 2475 | |
| 2476 | (defun revert-buffer (&optional ignore-auto noconfirm preserve-modes) |
| 2477 | "Replace current buffer text with the text of the visited file on disk. |
| 2478 | This undoes all changes since the file was visited or saved. |
| 2479 | With a prefix argument, offer to revert from latest auto-save file, if |
| 2480 | that is more recent than the visited file. |
| 2481 | |
| 2482 | This command also works for special buffers that contain text which |
| 2483 | doesn't come from a file, but reflects some other data base instead: |
| 2484 | for example, Dired buffers and buffer-list buffers. In these cases, |
| 2485 | it reconstructs the buffer contents from the appropriate data base. |
| 2486 | |
| 2487 | When called from Lisp, the first argument is IGNORE-AUTO; only offer |
| 2488 | to revert from the auto-save file when this is nil. Note that the |
| 2489 | sense of this argument is the reverse of the prefix argument, for the |
| 2490 | sake of backward compatibility. IGNORE-AUTO is optional, defaulting |
| 2491 | to nil. |
| 2492 | |
| 2493 | Optional second argument NOCONFIRM means don't ask for confirmation at |
| 2494 | all. |
| 2495 | |
| 2496 | Optional third argument PRESERVE-MODES non-nil means don't alter |
| 2497 | the files modes. Normally we reinitialize them using `normal-mode'. |
| 2498 | |
| 2499 | If the value of `revert-buffer-function' is non-nil, it is called to |
| 2500 | do all the work for this command. Otherwise, the hooks |
| 2501 | `before-revert-hook' and `after-revert-hook' are run at the beginning |
| 2502 | and the end, and if `revert-buffer-insert-file-contents-function' is |
| 2503 | non-nil, it is called instead of rereading visited file contents." |
| 2504 | |
| 2505 | ;; I admit it's odd to reverse the sense of the prefix argument, but |
| 2506 | ;; there is a lot of code out there which assumes that the first |
| 2507 | ;; argument should be t to avoid consulting the auto-save file, and |
| 2508 | ;; there's no straightforward way to encourage authors to notice a |
| 2509 | ;; reversal of the argument sense. So I'm just changing the user |
| 2510 | ;; interface, but leaving the programmatic interface the same. |
| 2511 | (interactive (list (not current-prefix-arg))) |
| 2512 | (if revert-buffer-function |
| 2513 | (funcall revert-buffer-function ignore-auto noconfirm) |
| 2514 | (let* ((opoint (point)) |
| 2515 | (auto-save-p (and (not ignore-auto) |
| 2516 | (recent-auto-save-p) |
| 2517 | buffer-auto-save-file-name |
| 2518 | (file-readable-p buffer-auto-save-file-name) |
| 2519 | (y-or-n-p |
| 2520 | "Buffer has been auto-saved recently. Revert from auto-save file? "))) |
| 2521 | (file-name (if auto-save-p |
| 2522 | buffer-auto-save-file-name |
| 2523 | buffer-file-name))) |
| 2524 | (cond ((null file-name) |
| 2525 | (error "Buffer does not seem to be associated with any file")) |
| 2526 | ((or noconfirm |
| 2527 | (and (not (buffer-modified-p)) |
| 2528 | (let ((tail revert-without-query) |
| 2529 | (found nil)) |
| 2530 | (while tail |
| 2531 | (if (string-match (car tail) file-name) |
| 2532 | (setq found t)) |
| 2533 | (setq tail (cdr tail))) |
| 2534 | found)) |
| 2535 | (yes-or-no-p (format "Revert buffer from file %s? " |
| 2536 | file-name))) |
| 2537 | (run-hooks 'before-revert-hook) |
| 2538 | ;; If file was backed up but has changed since, |
| 2539 | ;; we shd make another backup. |
| 2540 | (and (not auto-save-p) |
| 2541 | (not (verify-visited-file-modtime (current-buffer))) |
| 2542 | (setq buffer-backed-up nil)) |
| 2543 | ;; Get rid of all undo records for this buffer. |
| 2544 | (or (eq buffer-undo-list t) |
| 2545 | (setq buffer-undo-list nil)) |
| 2546 | ;; Effectively copy the after-revert-hook status, |
| 2547 | ;; since after-find-file will clobber it. |
| 2548 | (let ((global-hook (default-value 'after-revert-hook)) |
| 2549 | (local-hook-p (local-variable-p 'after-revert-hook)) |
| 2550 | (local-hook (and (local-variable-p 'after-revert-hook) |
| 2551 | after-revert-hook))) |
| 2552 | (let (buffer-read-only |
| 2553 | ;; Don't make undo records for the reversion. |
| 2554 | (buffer-undo-list t)) |
| 2555 | (if revert-buffer-insert-file-contents-function |
| 2556 | (funcall revert-buffer-insert-file-contents-function |
| 2557 | file-name auto-save-p) |
| 2558 | (if (not (file-exists-p file-name)) |
| 2559 | (error "File %s no longer exists!" file-name)) |
| 2560 | ;; Bind buffer-file-name to nil |
| 2561 | ;; so that we don't try to lock the file. |
| 2562 | (let ((buffer-file-name nil)) |
| 2563 | (or auto-save-p |
| 2564 | (unlock-buffer))) |
| 2565 | (widen) |
| 2566 | (let ((coding-system-for-read |
| 2567 | ;; Auto-saved file shoule be read without |
| 2568 | ;; any code conversion. |
| 2569 | (if auto-save-p 'no-conversion |
| 2570 | coding-system-for-read))) |
| 2571 | (insert-file-contents file-name (not auto-save-p) |
| 2572 | nil nil t)))) |
| 2573 | (goto-char (min opoint (point-max))) |
| 2574 | ;; Recompute the truename in case changes in symlinks |
| 2575 | ;; have changed the truename. |
| 2576 | (setq buffer-file-truename |
| 2577 | (abbreviate-file-name (file-truename buffer-file-name))) |
| 2578 | (after-find-file nil nil t t preserve-modes) |
| 2579 | ;; Run after-revert-hook as it was before we reverted. |
| 2580 | (setq-default revert-buffer-internal-hook global-hook) |
| 2581 | (if local-hook-p |
| 2582 | (progn |
| 2583 | (make-local-variable 'revert-buffer-internal-hook) |
| 2584 | (setq revert-buffer-internal-hook local-hook)) |
| 2585 | (kill-local-variable 'revert-buffer-internal-hook)) |
| 2586 | (run-hooks 'revert-buffer-internal-hook)) |
| 2587 | t))))) |
| 2588 | |
| 2589 | (defun recover-file (file) |
| 2590 | "Visit file FILE, but get contents from its last auto-save file." |
| 2591 | ;; Actually putting the file name in the minibuffer should be used |
| 2592 | ;; only rarely. |
| 2593 | ;; Not just because users often use the default. |
| 2594 | (interactive "FRecover file: ") |
| 2595 | (setq file (expand-file-name file)) |
| 2596 | (if (auto-save-file-name-p (file-name-nondirectory file)) |
| 2597 | (error "%s is an auto-save file" file)) |
| 2598 | (let ((file-name (let ((buffer-file-name file)) |
| 2599 | (make-auto-save-file-name)))) |
| 2600 | (cond ((if (file-exists-p file) |
| 2601 | (not (file-newer-than-file-p file-name file)) |
| 2602 | (not (file-exists-p file-name))) |
| 2603 | (error "Auto-save file %s not current" file-name)) |
| 2604 | ((save-window-excursion |
| 2605 | (if (not (memq system-type '(vax-vms windows-nt))) |
| 2606 | (with-output-to-temp-buffer "*Directory*" |
| 2607 | (buffer-disable-undo standard-output) |
| 2608 | (call-process "ls" nil standard-output nil |
| 2609 | (if (file-symlink-p file) "-lL" "-l") |
| 2610 | file file-name))) |
| 2611 | (yes-or-no-p (format "Recover auto save file %s? " file-name))) |
| 2612 | (switch-to-buffer (find-file-noselect file t)) |
| 2613 | (let ((buffer-read-only nil) |
| 2614 | ;; Auto-saved file shoule be read without any code conversion. |
| 2615 | (coding-system-for-read 'no-conversion)) |
| 2616 | (erase-buffer) |
| 2617 | (insert-file-contents file-name nil)) |
| 2618 | (after-find-file nil nil t)) |
| 2619 | (t (error "Recover-file cancelled"))))) |
| 2620 | |
| 2621 | (defun recover-session () |
| 2622 | "Recover auto save files from a previous Emacs session. |
| 2623 | This command first displays a Dired buffer showing you the |
| 2624 | previous sessions that you could recover from. |
| 2625 | To choose one, move point to the proper line and then type C-c C-c. |
| 2626 | Then you'll be asked about a number of files to recover." |
| 2627 | (interactive) |
| 2628 | (if (null auto-save-list-file-prefix) |
| 2629 | (error "You set `auto-save-list-file-prefix' to disable making session files")) |
| 2630 | (let ((ls-lisp-support-shell-wildcards t)) |
| 2631 | (dired (concat auto-save-list-file-prefix "*") |
| 2632 | (concat dired-listing-switches "t"))) |
| 2633 | (goto-char (point-min)) |
| 2634 | (or (looking-at "Move to the session you want to recover,") |
| 2635 | (let ((inhibit-read-only t)) |
| 2636 | (insert "Move to the session you want to recover,\n" |
| 2637 | "then type C-c C-c to select it.\n\n" |
| 2638 | "You can also delete some of these files;\n" |
| 2639 | "type d on a line to mark that file for deletion.\n\n"))) |
| 2640 | (use-local-map (nconc (make-sparse-keymap) (current-local-map))) |
| 2641 | (define-key (current-local-map) "\C-c\C-c" 'recover-session-finish)) |
| 2642 | |
| 2643 | (defun recover-session-finish () |
| 2644 | "Choose one saved session to recover auto-save files from. |
| 2645 | This command is used in the special Dired buffer created by |
| 2646 | \\[recover-session]." |
| 2647 | (interactive) |
| 2648 | ;; Get the name of the session file to recover from. |
| 2649 | (let ((file (dired-get-filename)) |
| 2650 | files |
| 2651 | (buffer (get-buffer-create " *recover*"))) |
| 2652 | (dired-do-flagged-delete t) |
| 2653 | (unwind-protect |
| 2654 | (save-excursion |
| 2655 | ;; Read in the auto-save-list file. |
| 2656 | (set-buffer buffer) |
| 2657 | (erase-buffer) |
| 2658 | (insert-file-contents file) |
| 2659 | ;; Loop thru the text of that file |
| 2660 | ;; and get out the names of the files to recover. |
| 2661 | (while (not (eobp)) |
| 2662 | (let (thisfile autofile) |
| 2663 | (if (eolp) |
| 2664 | ;; This is a pair of lines for a non-file-visiting buffer. |
| 2665 | ;; Get the auto-save file name and manufacture |
| 2666 | ;; a "visited file name" from that. |
| 2667 | (progn |
| 2668 | (forward-line 1) |
| 2669 | (setq autofile |
| 2670 | (buffer-substring-no-properties |
| 2671 | (point) |
| 2672 | (save-excursion |
| 2673 | (end-of-line) |
| 2674 | (point)))) |
| 2675 | (setq thisfile |
| 2676 | (expand-file-name |
| 2677 | (substring |
| 2678 | (file-name-nondirectory autofile) |
| 2679 | 1 -1) |
| 2680 | (file-name-directory autofile))) |
| 2681 | (forward-line 1)) |
| 2682 | ;; This pair of lines is a file-visiting |
| 2683 | ;; buffer. Use the visited file name. |
| 2684 | (progn |
| 2685 | (setq thisfile |
| 2686 | (buffer-substring-no-properties |
| 2687 | (point) (progn (end-of-line) (point)))) |
| 2688 | (forward-line 1) |
| 2689 | (setq autofile |
| 2690 | (buffer-substring-no-properties |
| 2691 | (point) (progn (end-of-line) (point)))) |
| 2692 | (forward-line 1))) |
| 2693 | ;; Ignore a file if its auto-save file does not exist now. |
| 2694 | (if (file-exists-p autofile) |
| 2695 | (setq files (cons thisfile files))))) |
| 2696 | (setq files (nreverse files)) |
| 2697 | ;; The file contains a pair of line for each auto-saved buffer. |
| 2698 | ;; The first line of the pair contains the visited file name |
| 2699 | ;; or is empty if the buffer was not visiting a file. |
| 2700 | ;; The second line is the auto-save file name. |
| 2701 | (if files |
| 2702 | (map-y-or-n-p "Recover %s? " |
| 2703 | (lambda (file) |
| 2704 | (condition-case nil |
| 2705 | (save-excursion (recover-file file)) |
| 2706 | (error |
| 2707 | "Failed to recover `%s'" file))) |
| 2708 | files |
| 2709 | '("file" "files" "recover")) |
| 2710 | (message "No files can be recovered from this session now"))) |
| 2711 | (kill-buffer buffer)))) |
| 2712 | |
| 2713 | (defun kill-some-buffers (&optional list) |
| 2714 | "For each buffer in LIST, ask whether to kill it. |
| 2715 | LIST defaults to all existing live buffers." |
| 2716 | (interactive) |
| 2717 | (if (null list) |
| 2718 | (setq list (buffer-list))) |
| 2719 | (while list |
| 2720 | (let* ((buffer (car list)) |
| 2721 | (name (buffer-name buffer))) |
| 2722 | (and (not (string-equal name "")) |
| 2723 | (/= (aref name 0) ? ) |
| 2724 | (yes-or-no-p |
| 2725 | (format "Buffer %s %s. Kill? " |
| 2726 | name |
| 2727 | (if (buffer-modified-p buffer) |
| 2728 | "HAS BEEN EDITED" "is unmodified"))) |
| 2729 | (kill-buffer buffer))) |
| 2730 | (setq list (cdr list)))) |
| 2731 | \f |
| 2732 | (defun auto-save-mode (arg) |
| 2733 | "Toggle auto-saving of contents of current buffer. |
| 2734 | With prefix argument ARG, turn auto-saving on if positive, else off." |
| 2735 | (interactive "P") |
| 2736 | (setq buffer-auto-save-file-name |
| 2737 | (and (if (null arg) |
| 2738 | (or (not buffer-auto-save-file-name) |
| 2739 | ;; If autosave is off because buffer has shrunk, |
| 2740 | ;; then toggling should turn it on. |
| 2741 | (< buffer-saved-size 0)) |
| 2742 | (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) |
| 2743 | (if (and buffer-file-name auto-save-visited-file-name |
| 2744 | (not buffer-read-only)) |
| 2745 | buffer-file-name |
| 2746 | (make-auto-save-file-name)))) |
| 2747 | ;; If -1 was stored here, to temporarily turn off saving, |
| 2748 | ;; turn it back on. |
| 2749 | (and (< buffer-saved-size 0) |
| 2750 | (setq buffer-saved-size 0)) |
| 2751 | (if (interactive-p) |
| 2752 | (message "Auto-save %s (in this buffer)" |
| 2753 | (if buffer-auto-save-file-name "on" "off"))) |
| 2754 | buffer-auto-save-file-name) |
| 2755 | |
| 2756 | (defun rename-auto-save-file () |
| 2757 | "Adjust current buffer's auto save file name for current conditions. |
| 2758 | Also rename any existing auto save file, if it was made in this session." |
| 2759 | (let ((osave buffer-auto-save-file-name)) |
| 2760 | (setq buffer-auto-save-file-name |
| 2761 | (make-auto-save-file-name)) |
| 2762 | (if (and osave buffer-auto-save-file-name |
| 2763 | (not (string= buffer-auto-save-file-name buffer-file-name)) |
| 2764 | (not (string= buffer-auto-save-file-name osave)) |
| 2765 | (file-exists-p osave) |
| 2766 | (recent-auto-save-p)) |
| 2767 | (rename-file osave buffer-auto-save-file-name t)))) |
| 2768 | |
| 2769 | (defun make-auto-save-file-name () |
| 2770 | "Return file name to use for auto-saves of current buffer. |
| 2771 | Does not consider `auto-save-visited-file-name' as that variable is checked |
| 2772 | before calling this function. You can redefine this for customization. |
| 2773 | See also `auto-save-file-name-p'." |
| 2774 | (if buffer-file-name |
| 2775 | (if (and (eq system-type 'ms-dos) |
| 2776 | (not (msdos-long-file-names))) |
| 2777 | (let ((fn (file-name-nondirectory buffer-file-name))) |
| 2778 | (string-match "\\`\\([^.]+\\)\\(\\.\\(..?\\)?.?\\|\\)\\'" fn) |
| 2779 | (concat (file-name-directory buffer-file-name) |
| 2780 | "#" (match-string 1 fn) |
| 2781 | "." (match-string 3 fn) "#")) |
| 2782 | (concat (file-name-directory buffer-file-name) |
| 2783 | "#" |
| 2784 | (file-name-nondirectory buffer-file-name) |
| 2785 | "#")) |
| 2786 | |
| 2787 | ;; Deal with buffers that don't have any associated files. (Mail |
| 2788 | ;; mode tends to create a good number of these.) |
| 2789 | |
| 2790 | (let ((buffer-name (buffer-name)) |
| 2791 | (limit 0)) |
| 2792 | ;; Eliminate all slashes and backslashes by |
| 2793 | ;; replacing them with sequences that start with %. |
| 2794 | ;; Quote % also, to keep distinct names distinct. |
| 2795 | (while (string-match "[/\\%]" buffer-name limit) |
| 2796 | (let* ((character (aref buffer-name (match-beginning 0))) |
| 2797 | (replacement |
| 2798 | (cond ((eq character ?%) "%%") |
| 2799 | ((eq character ?/) "%+") |
| 2800 | ((eq character ?\\) "%-")))) |
| 2801 | (setq buffer-name (replace-match replacement t t buffer-name)) |
| 2802 | (setq limit (1+ (match-end 0))))) |
| 2803 | ;; Generate the file name. |
| 2804 | (expand-file-name |
| 2805 | (format "#%s#%s#" buffer-name (make-temp-name "")) |
| 2806 | ;; Try a few alternative directories, to get one we can write it. |
| 2807 | (cond |
| 2808 | ((file-writable-p default-directory) default-directory) |
| 2809 | ((file-writable-p "/var/tmp/") "/var/tmp/") |
| 2810 | ("~/")))))) |
| 2811 | |
| 2812 | (defun auto-save-file-name-p (filename) |
| 2813 | "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'. |
| 2814 | FILENAME should lack slashes. You can redefine this for customization." |
| 2815 | (string-match "^#.*#$" filename)) |
| 2816 | \f |
| 2817 | (defun wildcard-to-regexp (wildcard) |
| 2818 | "Given a shell file name pattern WILDCARD, return an equivalent regexp. |
| 2819 | The generated regexp will match a filename iff the filename |
| 2820 | matches that wildcard according to shell rules. Only wildcards known |
| 2821 | by `sh' are supported." |
| 2822 | (let* ((i (string-match "[[.*+\\^$?]" wildcard)) |
| 2823 | ;; Copy the initial run of non-special characters. |
| 2824 | (result (substring wildcard 0 i)) |
| 2825 | (len (length wildcard))) |
| 2826 | ;; If no special characters, we're almost done. |
| 2827 | (if i |
| 2828 | (while (< i len) |
| 2829 | (let ((ch (aref wildcard i)) |
| 2830 | j) |
| 2831 | (setq |
| 2832 | result |
| 2833 | (concat result |
| 2834 | (cond |
| 2835 | ((and (eq ch ?\[) |
| 2836 | (< (1+ i) len) |
| 2837 | (eq (aref wildcard (1+ i)) ?\])) |
| 2838 | "\\[") |
| 2839 | ((eq ch ?\[) ; [...] maps to regexp char class |
| 2840 | (progn |
| 2841 | (setq i (1+ i)) |
| 2842 | (concat |
| 2843 | (cond |
| 2844 | ((eq (aref wildcard i) ?!) ; [!...] -> [^...] |
| 2845 | (progn |
| 2846 | (setq i (1+ i)) |
| 2847 | (if (eq (aref wildcard i) ?\]) |
| 2848 | (progn |
| 2849 | (setq i (1+ i)) |
| 2850 | "[^]") |
| 2851 | "[^"))) |
| 2852 | ((eq (aref wildcard i) ?^) |
| 2853 | ;; Found "[^". Insert a `\0' character |
| 2854 | ;; (which cannot happen in a filename) |
| 2855 | ;; into the character class, so that `^' |
| 2856 | ;; is not the first character after `[', |
| 2857 | ;; and thus non-special in a regexp. |
| 2858 | (progn |
| 2859 | (setq i (1+ i)) |
| 2860 | "[\000^")) |
| 2861 | ((eq (aref wildcard i) ?\]) |
| 2862 | ;; I don't think `]' can appear in a |
| 2863 | ;; character class in a wildcard, but |
| 2864 | ;; let's be general here. |
| 2865 | (progn |
| 2866 | (setq i (1+ i)) |
| 2867 | "[]")) |
| 2868 | (t "[")) |
| 2869 | (prog1 ; copy everything upto next `]'. |
| 2870 | (substring wildcard |
| 2871 | i |
| 2872 | (setq j (string-match |
| 2873 | "]" wildcard i))) |
| 2874 | (setq i (if j (1- j) (1- len))))))) |
| 2875 | ((eq ch ?.) "\\.") |
| 2876 | ((eq ch ?*) "[^\000]*") |
| 2877 | ((eq ch ?+) "\\+") |
| 2878 | ((eq ch ?^) "\\^") |
| 2879 | ((eq ch ?$) "\\$") |
| 2880 | ((eq ch ?\\) "\\\\") ; probably cannot happen... |
| 2881 | ((eq ch ??) "[^\000]") |
| 2882 | (t (char-to-string ch))))) |
| 2883 | (setq i (1+ i))))) |
| 2884 | ;; Shell wildcards should match the entire filename, |
| 2885 | ;; not its part. Make the regexp say so. |
| 2886 | (concat "\\`" result "\\'"))) |
| 2887 | \f |
| 2888 | (defcustom list-directory-brief-switches |
| 2889 | (if (eq system-type 'vax-vms) "" "-CF") |
| 2890 | "*Switches for list-directory to pass to `ls' for brief listing," |
| 2891 | :type 'string |
| 2892 | :group 'dired) |
| 2893 | |
| 2894 | (defcustom list-directory-verbose-switches |
| 2895 | (if (eq system-type 'vax-vms) |
| 2896 | "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)" |
| 2897 | "-l") |
| 2898 | "*Switches for list-directory to pass to `ls' for verbose listing," |
| 2899 | :type 'string |
| 2900 | :group 'dired) |
| 2901 | |
| 2902 | (defun list-directory (dirname &optional verbose) |
| 2903 | "Display a list of files in or matching DIRNAME, a la `ls'. |
| 2904 | DIRNAME is globbed by the shell if necessary. |
| 2905 | Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. |
| 2906 | Actions controlled by variables `list-directory-brief-switches' |
| 2907 | and `list-directory-verbose-switches'." |
| 2908 | (interactive (let ((pfx current-prefix-arg)) |
| 2909 | (list (read-file-name (if pfx "List directory (verbose): " |
| 2910 | "List directory (brief): ") |
| 2911 | nil default-directory nil) |
| 2912 | pfx))) |
| 2913 | (let ((switches (if verbose list-directory-verbose-switches |
| 2914 | list-directory-brief-switches))) |
| 2915 | (or dirname (setq dirname default-directory)) |
| 2916 | (setq dirname (expand-file-name dirname)) |
| 2917 | (with-output-to-temp-buffer "*Directory*" |
| 2918 | (buffer-disable-undo standard-output) |
| 2919 | (princ "Directory ") |
| 2920 | (princ dirname) |
| 2921 | (terpri) |
| 2922 | (save-excursion |
| 2923 | (set-buffer "*Directory*") |
| 2924 | (setq default-directory |
| 2925 | (if (file-directory-p dirname) |
| 2926 | (file-name-as-directory dirname) |
| 2927 | (file-name-directory dirname))) |
| 2928 | (let ((wildcard (not (file-directory-p dirname)))) |
| 2929 | (insert-directory dirname switches wildcard (not wildcard))))))) |
| 2930 | |
| 2931 | (defvar insert-directory-program "ls" |
| 2932 | "Absolute or relative name of the `ls' program used by `insert-directory'.") |
| 2933 | |
| 2934 | ;; insert-directory |
| 2935 | ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and |
| 2936 | ;; FULL-DIRECTORY-P is nil. |
| 2937 | ;; The single line of output must display FILE's name as it was |
| 2938 | ;; given, namely, an absolute path name. |
| 2939 | ;; - must insert exactly one line for each file if WILDCARD or |
| 2940 | ;; FULL-DIRECTORY-P is t, plus one optional "total" line |
| 2941 | ;; before the file lines, plus optional text after the file lines. |
| 2942 | ;; Lines are delimited by "\n", so filenames containing "\n" are not |
| 2943 | ;; allowed. |
| 2944 | ;; File lines should display the basename. |
| 2945 | ;; - must be consistent with |
| 2946 | ;; - functions dired-move-to-filename, (these two define what a file line is) |
| 2947 | ;; dired-move-to-end-of-filename, |
| 2948 | ;; dired-between-files, (shortcut for (not (dired-move-to-filename))) |
| 2949 | ;; dired-insert-headerline |
| 2950 | ;; dired-after-subdir-garbage (defines what a "total" line is) |
| 2951 | ;; - variable dired-subdir-regexp |
| 2952 | (defun insert-directory (file switches &optional wildcard full-directory-p) |
| 2953 | "Insert directory listing for FILE, formatted according to SWITCHES. |
| 2954 | Leaves point after the inserted text. |
| 2955 | SWITCHES may be a string of options, or a list of strings. |
| 2956 | Optional third arg WILDCARD means treat FILE as shell wildcard. |
| 2957 | Optional fourth arg FULL-DIRECTORY-P means file is a directory and |
| 2958 | switches do not contain `d', so that a full listing is expected. |
| 2959 | |
| 2960 | This works by running a directory listing program |
| 2961 | whose name is in the variable `insert-directory-program'. |
| 2962 | If WILDCARD, it also runs the shell specified by `shell-file-name'." |
| 2963 | ;; We need the directory in order to find the right handler. |
| 2964 | (let ((handler (find-file-name-handler (expand-file-name file) |
| 2965 | 'insert-directory))) |
| 2966 | (if handler |
| 2967 | (funcall handler 'insert-directory file switches |
| 2968 | wildcard full-directory-p) |
| 2969 | (if (eq system-type 'vax-vms) |
| 2970 | (vms-read-directory file switches (current-buffer)) |
| 2971 | (or (= 0 |
| 2972 | (if wildcard |
| 2973 | ;; Run ls in the directory of the file pattern we asked for. |
| 2974 | (let ((default-directory |
| 2975 | (if (file-name-absolute-p file) |
| 2976 | (file-name-directory file) |
| 2977 | (file-name-directory (expand-file-name file)))) |
| 2978 | (pattern (file-name-nondirectory file)) |
| 2979 | (beg 0)) |
| 2980 | ;; Quote some characters that have special meanings in shells; |
| 2981 | ;; but don't quote the wildcards--we want them to be special. |
| 2982 | ;; We also currently don't quote the quoting characters |
| 2983 | ;; in case people want to use them explicitly to quote |
| 2984 | ;; wildcard characters. |
| 2985 | (while (string-match "[ \t\n;<>&|()#$]" pattern beg) |
| 2986 | (setq pattern |
| 2987 | (concat (substring pattern 0 (match-beginning 0)) |
| 2988 | "\\" |
| 2989 | (substring pattern (match-beginning 0))) |
| 2990 | beg (1+ (match-end 0)))) |
| 2991 | (call-process shell-file-name nil t nil |
| 2992 | "-c" (concat "\\" ;; Disregard shell aliases! |
| 2993 | insert-directory-program |
| 2994 | " -d " |
| 2995 | (if (stringp switches) |
| 2996 | switches |
| 2997 | (mapconcat 'identity switches " ")) |
| 2998 | " -- " |
| 2999 | (encode-coding-string |
| 3000 | pattern |
| 3001 | file-name-coding-system t)))) |
| 3002 | ;; SunOS 4.1.3, SVr4 and others need the "." to list the |
| 3003 | ;; directory if FILE is a symbolic link. |
| 3004 | (apply 'call-process |
| 3005 | insert-directory-program nil t nil |
| 3006 | (let (list) |
| 3007 | (if (listp switches) |
| 3008 | (setq list switches) |
| 3009 | (if (not (equal switches "")) |
| 3010 | (progn |
| 3011 | ;; Split the switches at any spaces |
| 3012 | ;; so we can pass separate options as separate args. |
| 3013 | (while (string-match " " switches) |
| 3014 | (setq list (cons (substring switches 0 (match-beginning 0)) |
| 3015 | list) |
| 3016 | switches (substring switches (match-end 0)))) |
| 3017 | (setq list (nreverse (cons switches list)))))) |
| 3018 | (append list |
| 3019 | ;; Avoid lossage if FILE starts with `-'. |
| 3020 | '("--") |
| 3021 | (list |
| 3022 | (encode-coding-string |
| 3023 | (if full-directory-p |
| 3024 | (concat (file-name-as-directory file) ".") |
| 3025 | file) |
| 3026 | file-name-coding-system t))))))) |
| 3027 | ;; We get here if ls failed. |
| 3028 | ;; Access the file to get a suitable error. |
| 3029 | (access-file file "Reading directory")))))) |
| 3030 | |
| 3031 | (defvar kill-emacs-query-functions nil |
| 3032 | "Functions to call with no arguments to query about killing Emacs. |
| 3033 | If any of these functions returns nil, killing Emacs is cancelled. |
| 3034 | `save-buffers-kill-emacs' (\\[save-buffers-kill-emacs]) calls these functions, |
| 3035 | but `kill-emacs', the low level primitive, does not. |
| 3036 | See also `kill-emacs-hook'.") |
| 3037 | |
| 3038 | (defun save-buffers-kill-emacs (&optional arg) |
| 3039 | "Offer to save each buffer, then kill this Emacs process. |
| 3040 | With prefix arg, silently save all file-visiting buffers, then kill." |
| 3041 | (interactive "P") |
| 3042 | (save-some-buffers arg t) |
| 3043 | (and (or (not (memq t (mapcar (function |
| 3044 | (lambda (buf) (and (buffer-file-name buf) |
| 3045 | (buffer-modified-p buf)))) |
| 3046 | (buffer-list)))) |
| 3047 | (yes-or-no-p "Modified buffers exist; exit anyway? ")) |
| 3048 | (or (not (fboundp 'process-list)) |
| 3049 | ;; process-list is not defined on VMS. |
| 3050 | (let ((processes (process-list)) |
| 3051 | active) |
| 3052 | (while processes |
| 3053 | (and (memq (process-status (car processes)) '(run stop open)) |
| 3054 | (let ((val (process-kill-without-query (car processes)))) |
| 3055 | (process-kill-without-query (car processes) val) |
| 3056 | val) |
| 3057 | (setq active t)) |
| 3058 | (setq processes (cdr processes))) |
| 3059 | (or (not active) |
| 3060 | (yes-or-no-p "Active processes exist; kill them and exit anyway? ")))) |
| 3061 | ;; Query the user for other things, perhaps. |
| 3062 | (run-hook-with-args-until-failure 'kill-emacs-query-functions) |
| 3063 | (kill-emacs))) |
| 3064 | \f |
| 3065 | ;; We use /: as a prefix to "quote" a file name |
| 3066 | ;; so that magic file name handlers will not apply to it. |
| 3067 | |
| 3068 | (setq file-name-handler-alist |
| 3069 | (cons '("\\`/:" . file-name-non-special) |
| 3070 | file-name-handler-alist)) |
| 3071 | |
| 3072 | ;; We depend on being the last handler on the list, |
| 3073 | ;; so that anything else which does need handling |
| 3074 | ;; has been handled already. |
| 3075 | ;; So it is safe for us to inhibit *all* magic file name handlers. |
| 3076 | |
| 3077 | (defun file-name-non-special (operation &rest arguments) |
| 3078 | (let ((file-name-handler-alist nil) |
| 3079 | ;; Get a list of the indices of the args which are file names. |
| 3080 | (file-arg-indices |
| 3081 | (cdr (or (assq operation |
| 3082 | ;; The first four are special because they |
| 3083 | ;; return a file name. We want to include the /: |
| 3084 | ;; in the return value. |
| 3085 | ;; So just avoid stripping it in the first place. |
| 3086 | '((expand-file-name . nil) |
| 3087 | ;; `identity' means just return the first arg |
| 3088 | ;; as stripped of its quoting. |
| 3089 | (substitute-in-file-name . identity) |
| 3090 | (file-name-directory . nil) |
| 3091 | (file-name-as-directory . nil) |
| 3092 | (directory-file-name . nil) |
| 3093 | (file-name-completion 0 1) |
| 3094 | (file-name-all-completions 0 1) |
| 3095 | (rename-file 0 1) |
| 3096 | (copy-file 0 1) |
| 3097 | (make-symbolic-link 0 1) |
| 3098 | (add-name-to-file 0 1))) |
| 3099 | ;; For all other operations, treat the first argument only |
| 3100 | ;; as the file name. |
| 3101 | '(nil 0)))) |
| 3102 | ;; Copy ARGUMENTS so we can replace elements in it. |
| 3103 | (arguments (copy-sequence arguments))) |
| 3104 | ;; Strip off the /: from the file names that have this handler. |
| 3105 | (save-match-data |
| 3106 | (while (consp file-arg-indices) |
| 3107 | (let ((pair (nthcdr (car file-arg-indices) arguments))) |
| 3108 | (and (car pair) |
| 3109 | (string-match "\\`/:" (car pair)) |
| 3110 | (setcar pair |
| 3111 | (if (= (length (car pair)) 2) |
| 3112 | "/" |
| 3113 | (substring (car pair) 2))))) |
| 3114 | (setq file-arg-indices (cdr file-arg-indices)))) |
| 3115 | (if (eq file-arg-indices 'identity) |
| 3116 | (car arguments) |
| 3117 | (apply operation arguments)))) |
| 3118 | \f |
| 3119 | (define-key ctl-x-map "\C-f" 'find-file) |
| 3120 | (define-key ctl-x-map "\C-r" 'find-file-read-only) |
| 3121 | (define-key ctl-x-map "\C-v" 'find-alternate-file) |
| 3122 | (define-key ctl-x-map "\C-s" 'save-buffer) |
| 3123 | (define-key ctl-x-map "s" 'save-some-buffers) |
| 3124 | (define-key ctl-x-map "\C-w" 'write-file) |
| 3125 | (define-key ctl-x-map "i" 'insert-file) |
| 3126 | (define-key esc-map "~" 'not-modified) |
| 3127 | (define-key ctl-x-map "\C-d" 'list-directory) |
| 3128 | (define-key ctl-x-map "\C-c" 'save-buffers-kill-emacs) |
| 3129 | |
| 3130 | (define-key ctl-x-4-map "f" 'find-file-other-window) |
| 3131 | (define-key ctl-x-4-map "r" 'find-file-read-only-other-window) |
| 3132 | (define-key ctl-x-4-map "\C-f" 'find-file-other-window) |
| 3133 | (define-key ctl-x-4-map "b" 'switch-to-buffer-other-window) |
| 3134 | (define-key ctl-x-4-map "\C-o" 'display-buffer) |
| 3135 | |
| 3136 | (define-key ctl-x-5-map "b" 'switch-to-buffer-other-frame) |
| 3137 | (define-key ctl-x-5-map "f" 'find-file-other-frame) |
| 3138 | (define-key ctl-x-5-map "\C-f" 'find-file-other-frame) |
| 3139 | (define-key ctl-x-5-map "r" 'find-file-read-only-other-frame) |
| 3140 | |
| 3141 | ;;; files.el ends here |