(make-coding-system): Fix typo.
[emacs.git] / lisp / dired-aux.el
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1 ;;; dired-aux.el --- less commonly used parts of dired -*-byte-compile-dynamic: t;-*-
3 ;; Copyright (C) 1985, 1986, 1992, 1994, 1998, 2000 Free Software Foundation, Inc.
5 ;; Author: Sebastian Kremer <sk@thp.uni-koeln.de>.
6 ;; Maintainer: FSF
8 ;; This file is part of GNU Emacs.
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.
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.
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.
25 ;;; Commentary:
27 ;; The parts of dired mode not normally used. This is a space-saving hack
28 ;; to avoid having to load a large mode when all that's wanted are a few
29 ;; functions.
31 ;; Rewritten in 1990/1991 to add tree features, file marking and
32 ;; sorting by Sebastian Kremer <sk@thp.uni-koeln.de>.
33 ;; Finished up by rms in 1992.
35 ;;; Code:
37 ;; We need macros in dired.el to compile properly.
38 (eval-when-compile (require 'dired))
40 ;;; 15K
41 ;;;###begin dired-cmd.el
42 ;; Diffing and compressing
44 ;;;###autoload
45 (defun dired-diff (file &optional switches)
46 "Compare file at point with file FILE using `diff'.
47 FILE defaults to the file at the mark.
48 The prompted-for file is the first file given to `diff'.
49 With prefix arg, prompt for second argument SWITCHES,
50 which is options for `diff'."
51 (interactive
52 (let ((default (if (mark t)
53 (save-excursion (goto-char (mark t))
54 (dired-get-filename t t)))))
55 (require 'diff)
56 (list (read-file-name (format "Diff %s with: %s"
57 (dired-get-filename t)
58 (if default
59 (concat "(default " default ") ")
60 ""))
61 (dired-current-directory) default t)
62 (if current-prefix-arg
63 (read-string "Options for diff: "
64 (if (stringp diff-switches)
65 diff-switches
66 (mapconcat 'identity diff-switches " ")))))))
67 (diff file (dired-get-filename t) switches))
69 ;;;###autoload
70 (defun dired-backup-diff (&optional switches)
71 "Diff this file with its backup file or vice versa.
72 Uses the latest backup, if there are several numerical backups.
73 If this file is a backup, diff it with its original.
74 The backup file is the first file given to `diff'.
75 With prefix arg, prompt for argument SWITCHES which is options for `diff'."
76 (interactive
77 (if current-prefix-arg
78 (list (read-string "Options for diff: "
79 (if (stringp diff-switches)
80 diff-switches
81 (mapconcat 'identity diff-switches " "))))
82 nil))
83 (diff-backup (dired-get-filename) switches))
85 (defun dired-do-chxxx (attribute-name program op-symbol arg)
86 ;; Change file attributes (mode, group, owner) of marked files and
87 ;; refresh their file lines.
88 ;; ATTRIBUTE-NAME is a string describing the attribute to the user.
89 ;; PROGRAM is the program used to change the attribute.
90 ;; OP-SYMBOL is the type of operation (for use in dired-mark-pop-up).
91 ;; ARG describes which files to use, as in dired-get-marked-files.
92 (let* ((files (dired-get-marked-files t arg))
93 (new-attribute
94 (dired-mark-read-string
95 (concat "Change " attribute-name " of %s to: ")
96 nil op-symbol arg files))
97 (operation (concat program " " new-attribute))
98 failures)
99 (setq failures
100 (dired-bunch-files 10000
101 (function dired-check-process)
102 (append
103 (list operation program new-attribute)
104 (if (string-match "gnu" system-configuration)
105 '("--") nil))
106 files))
107 (dired-do-redisplay arg);; moves point if ARG is an integer
108 (if failures
109 (dired-log-summary
110 (format "%s: error" operation)
111 nil))))
113 ;;;###autoload
114 (defun dired-do-chmod (&optional arg)
115 "Change the mode of the marked (or next ARG) files.
116 This calls chmod, thus symbolic modes like `g+w' are allowed."
117 (interactive "P")
118 (dired-do-chxxx "Mode" dired-chmod-program 'chmod arg))
120 ;;;###autoload
121 (defun dired-do-chgrp (&optional arg)
122 "Change the group of the marked (or next ARG) files."
123 (interactive "P")
124 (if (memq system-type '(ms-dos windows-nt))
125 (error "chgrp not supported on this system."))
126 (dired-do-chxxx "Group" "chgrp" 'chgrp arg))
128 ;;;###autoload
129 (defun dired-do-chown (&optional arg)
130 "Change the owner of the marked (or next ARG) files."
131 (interactive "P")
132 (if (memq system-type '(ms-dos windows-nt))
133 (error "chown not supported on this system."))
134 (dired-do-chxxx "Owner" dired-chown-program 'chown arg))
136 ;; Process all the files in FILES in batches of a convenient size,
137 ;; by means of (FUNCALL FUNCTION ARGS... SOME-FILES...).
138 ;; Batches are chosen to need less than MAX chars for the file names,
139 ;; allowing 3 extra characters of separator per file name.
140 (defun dired-bunch-files (max function args files)
141 (let (pending
142 (pending-length 0)
143 failures)
144 ;; Accumulate files as long as they fit in MAX chars,
145 ;; then process the ones accumulated so far.
146 (while files
147 (let* ((thisfile (car files))
148 (thislength (+ (length thisfile) 3))
149 (rest (cdr files)))
150 ;; If we have at least 1 pending file
151 ;; and this file won't fit in the length limit, process now.
152 (if (and pending (> (+ thislength pending-length) max))
153 (setq failures
154 (nconc (apply function (append args pending))
155 failures)
156 pending nil
157 pending-length 0))
158 ;; Do (setq pending (cons thisfile pending))
159 ;; but reuse the cons that was in `files'.
160 (setcdr files pending)
161 (setq pending files)
162 (setq pending-length (+ thislength pending-length))
163 (setq files rest)))
164 (nconc (apply function (append args pending))
165 failures)))
167 ;;;###autoload
168 (defun dired-do-print (&optional arg)
169 "Print the marked (or next ARG) files.
170 Uses the shell command coming from variables `lpr-command' and
171 `lpr-switches' as default."
172 (interactive "P")
173 (let* ((file-list (dired-get-marked-files t arg))
174 (command (dired-mark-read-string
175 "Print %s with: "
176 (mapconcat 'identity
177 (cons lpr-command
178 (if (stringp lpr-switches)
179 (list lpr-switches)
180 lpr-switches))
181 " ")
182 'print arg file-list)))
183 (dired-run-shell-command (dired-shell-stuff-it command file-list nil))))
185 ;; Read arguments for a marked-files command that wants a string
186 ;; that is not a file name,
187 ;; perhaps popping up the list of marked files.
188 ;; ARG is the prefix arg and indicates whether the files came from
189 ;; marks (ARG=nil) or a repeat factor (integerp ARG).
190 ;; If the current file was used, the list has but one element and ARG
191 ;; does not matter. (It is non-nil, non-integer in that case, namely '(4)).
193 (defun dired-mark-read-string (prompt initial op-symbol arg files)
194 ;; PROMPT for a string, with INITIAL input.
195 ;; Other args are used to give user feedback and pop-up:
196 ;; OP-SYMBOL of command, prefix ARG, marked FILES.
197 (dired-mark-pop-up
198 nil op-symbol files
199 (function read-string)
200 (format prompt (dired-mark-prompt arg files)) initial))
202 ;;; Cleaning a directory: flagging some backups for deletion.
204 (defvar dired-file-version-alist)
206 (defun dired-clean-directory (keep)
207 "Flag numerical backups for deletion.
208 Spares `dired-kept-versions' latest versions, and `kept-old-versions' oldest.
209 Positive prefix arg KEEP overrides `dired-kept-versions';
210 Negative prefix arg KEEP overrides `kept-old-versions' with KEEP made positive.
212 To clear the flags on these files, you can use \\[dired-flag-backup-files]
213 with a prefix argument."
214 (interactive "P")
215 (setq keep (if keep (prefix-numeric-value keep) dired-kept-versions))
216 (let ((early-retention (if (< keep 0) (- keep) kept-old-versions))
217 (late-retention (if (<= keep 0) dired-kept-versions keep))
218 (dired-file-version-alist ()))
219 (message "Cleaning numerical backups (keeping %d late, %d old)..."
220 late-retention early-retention)
221 ;; Look at each file.
222 ;; If the file has numeric backup versions,
223 ;; put on dired-file-version-alist an element of the form
224 ;; (FILENAME . VERSION-NUMBER-LIST)
225 (dired-map-dired-file-lines (function dired-collect-file-versions))
226 ;; Sort each VERSION-NUMBER-LIST,
227 ;; and remove the versions not to be deleted.
228 (let ((fval dired-file-version-alist))
229 (while fval
230 (let* ((sorted-v-list (cons 'q (sort (cdr (car fval)) '<)))
231 (v-count (length sorted-v-list)))
232 (if (> v-count (+ early-retention late-retention))
233 (rplacd (nthcdr early-retention sorted-v-list)
234 (nthcdr (- v-count late-retention)
235 sorted-v-list)))
236 (rplacd (car fval)
237 (cdr sorted-v-list)))
238 (setq fval (cdr fval))))
239 ;; Look at each file. If it is a numeric backup file,
240 ;; find it in a VERSION-NUMBER-LIST and maybe flag it for deletion.
241 (dired-map-dired-file-lines (function dired-trample-file-versions))
242 (message "Cleaning numerical backups...done")))
244 ;;; Subroutines of dired-clean-directory.
246 (defun dired-map-dired-file-lines (fun)
247 ;; Perform FUN with point at the end of each non-directory line.
248 ;; FUN takes one argument, the absolute filename.
249 (save-excursion
250 (let (file buffer-read-only)
251 (goto-char (point-min))
252 (while (not (eobp))
253 (save-excursion
254 (and (not (looking-at dired-re-dir))
255 (not (eolp))
256 (setq file (dired-get-filename nil t)) ; nil on non-file
257 (progn (end-of-line)
258 (funcall fun file))))
259 (forward-line 1)))))
261 (defun dired-collect-file-versions (fn)
262 (let ((fn (file-name-sans-versions fn)))
263 ;; Only do work if this file is not already in the alist.
264 (if (assoc fn dired-file-version-alist)
266 ;; If it looks like file FN has versions, return a list of the versions.
267 ;;That is a list of strings which are file names.
268 ;;The caller may want to flag some of these files for deletion.
269 (let* ((base-versions
270 (concat (file-name-nondirectory fn) ".~"))
271 (backup-extract-version-start (length base-versions))
272 (possibilities (file-name-all-completions
273 base-versions
274 (file-name-directory fn)))
275 (versions (mapcar 'backup-extract-version possibilities)))
276 (if versions
277 (setq dired-file-version-alist
278 (cons (cons fn versions)
279 dired-file-version-alist)))))))
281 (defun dired-trample-file-versions (fn)
282 (let* ((start-vn (string-match "\\.~[0-9]+~$" fn))
283 base-version-list)
284 (and start-vn
285 (setq base-version-list ; there was a base version to which
286 (assoc (substring fn 0 start-vn) ; this looks like a
287 dired-file-version-alist)) ; subversion
288 (not (memq (string-to-int (substring fn (+ 2 start-vn)))
289 base-version-list)) ; this one doesn't make the cut
290 (progn (beginning-of-line)
291 (delete-char 1)
292 (insert dired-del-marker)))))
294 ;;; Shell commands
296 (defun dired-read-shell-command (prompt arg files)
297 ;; "Read a dired shell command prompting with PROMPT (using read-string).
298 ;;ARG is the prefix arg and may be used to indicate in the prompt which
299 ;; files are affected.
300 ;;This is an extra function so that you can redefine it, e.g., to use gmhist."
301 (dired-mark-pop-up
302 nil 'shell files
303 (function read-string)
304 (format prompt (dired-mark-prompt arg files))
305 nil 'shell-command-history))
307 ;; The in-background argument is only needed in Emacs 18 where
308 ;; shell-command doesn't understand an appended ampersand `&'.
309 ;;;###autoload
310 (defun dired-do-shell-command (command &optional arg file-list)
311 "Run a shell command COMMAND on the marked files.
312 If no files are marked or a specific numeric prefix arg is given,
313 the next ARG files are used. Just \\[universal-argument] means the current file.
314 The prompt mentions the file(s) or the marker, as appropriate.
316 If there is output, it goes to a separate buffer.
318 Normally the command is run on each file individually.
319 However, if there is a `*' in the command then it is run
320 just once with the entire file list substituted there.
322 If there is no `*', but a `?' in the command then it is still run
323 on each file individually but with the filename substituted there
324 instead of att the end of the command.
326 No automatic redisplay of dired buffers is attempted, as there's no
327 telling what files the command may have changed. Type
328 \\[dired-do-redisplay] to redisplay the marked files.
330 The shell command has the top level directory as working directory, so
331 output files usually are created there instead of in a subdir.
333 In a noninteractive call (from Lisp code), you must specify
334 the list of file names explicitly with the FILE-LIST argument."
335 ;;Functions dired-run-shell-command and dired-shell-stuff-it do the
336 ;;actual work and can be redefined for customization.
337 (interactive
338 (let ((files (dired-get-marked-files t current-prefix-arg)))
339 (list
340 ;; Want to give feedback whether this file or marked files are used:
341 (dired-read-shell-command (concat "! on "
342 "%s: ")
343 current-prefix-arg
344 files)
345 current-prefix-arg
346 files)))
347 (let* ((on-each (not (string-match "\\*" command))))
348 (if on-each
349 (dired-bunch-files
350 (- 10000 (length command))
351 (function (lambda (&rest files)
352 (dired-run-shell-command
353 (dired-shell-stuff-it command files t arg))))
355 file-list)
356 ;; execute the shell command
357 (dired-run-shell-command
358 (dired-shell-stuff-it command file-list nil arg)))))
360 ;; Might use {,} for bash or csh:
361 (defvar dired-mark-prefix ""
362 "Prepended to marked files in dired shell commands.")
363 (defvar dired-mark-postfix ""
364 "Appended to marked files in dired shell commands.")
365 (defvar dired-mark-separator " "
366 "Separates marked files in dired shell commands.")
368 (defun dired-shell-stuff-it (command file-list on-each &optional raw-arg)
369 ;; "Make up a shell command line from COMMAND and FILE-LIST.
370 ;; If ON-EACH is t, COMMAND should be applied to each file, else
371 ;; simply concat all files and apply COMMAND to this.
372 ;; FILE-LIST's elements will be quoted for the shell."
373 ;; Might be redefined for smarter things and could then use RAW-ARG
374 ;; (coming from interactive P and currently ignored) to decide what to do.
375 ;; Smart would be a way to access basename or extension of file names.
376 ;; See dired-trns.el for an approach to this.
377 ;; Bug: There is no way to quote a * or a ?
378 ;; On the other hand, you can never accidentally get a * or a ? into
379 ;; your cmd.
380 (let ((stuff-it
381 (cond ((string-match "\\*" command)
382 (function (lambda (x)
383 (dired-replace-in-string "\\*" x command))))
384 ((string-match "\\?" command)
385 (function (lambda (x)
386 (dired-replace-in-string "\\?" x command))))
387 (t (function (lambda (x) (concat command " " x)))))))
388 (if on-each
389 (mapconcat stuff-it (mapcar 'shell-quote-argument file-list) ";")
390 (let ((fns (mapconcat 'shell-quote-argument
391 file-list dired-mark-separator)))
392 (if (> (length file-list) 1)
393 (setq fns (concat dired-mark-prefix fns dired-mark-postfix)))
394 (funcall stuff-it fns)))))
396 ;; This is an extra function so that it can be redefined by ange-ftp.
397 (defun dired-run-shell-command (command)
398 (let ((handler
399 (find-file-name-handler (directory-file-name default-directory)
400 'shell-command)))
401 (if handler (apply handler 'shell-command (list command))
402 (shell-command command)))
403 ;; Return nil for sake of nconc in dired-bunch-files.
404 nil)
406 ;; In Emacs 19 this will return program's exit status.
407 ;; This is a separate function so that ange-ftp can redefine it.
408 (defun dired-call-process (program discard &rest arguments)
409 ; "Run PROGRAM with output to current buffer unless DISCARD is t.
410 ;Remaining arguments are strings passed as command arguments to PROGRAM."
411 ;; Look for a handler for default-directory in case it is a remote file name.
412 (let ((handler
413 (find-file-name-handler (directory-file-name default-directory)
414 'dired-call-process)))
415 (if handler (apply handler 'dired-call-process
416 program discard arguments)
417 (apply 'call-process program nil (not discard) nil arguments))))
419 (defun dired-check-process (msg program &rest arguments)
420 ; "Display MSG while running PROGRAM, and check for output.
421 ;Remaining arguments are strings passed as command arguments to PROGRAM.
422 ; On error, insert output
423 ; in a log buffer and return the offending ARGUMENTS or PROGRAM.
424 ; Caller can cons up a list of failed args.
425 ;Else returns nil for success."
426 (let (err-buffer err (dir default-directory))
427 (message "%s..." msg)
428 (save-excursion
429 ;; Get a clean buffer for error output:
430 (setq err-buffer (get-buffer-create " *dired-check-process output*"))
431 (set-buffer err-buffer)
432 (erase-buffer)
433 (setq default-directory dir ; caller's default-directory
434 err (/= 0
435 (apply (function dired-call-process) program nil arguments)))
436 (if err
437 (progn
438 (dired-log (concat program " " (prin1-to-string arguments) "\n"))
439 (dired-log err-buffer)
440 (or arguments program t))
441 (kill-buffer err-buffer)
442 (message "%s...done" msg)
443 nil))))
445 ;; Commands that delete or redisplay part of the dired buffer.
447 (defun dired-kill-line (&optional arg)
448 (interactive "P")
449 (setq arg (prefix-numeric-value arg))
450 (let (buffer-read-only file)
451 (while (/= 0 arg)
452 (setq file (dired-get-filename nil t))
453 (if (not file)
454 (error "Can only kill file lines.")
455 (save-excursion (and file
456 (dired-goto-subdir file)
457 (dired-kill-subdir)))
458 (delete-region (progn (beginning-of-line) (point))
459 (progn (forward-line 1) (point)))
460 (if (> arg 0)
461 (setq arg (1- arg))
462 (setq arg (1+ arg))
463 (forward-line -1))))
464 (dired-move-to-filename)))
466 ;;;###autoload
467 (defun dired-do-kill-lines (&optional arg fmt)
468 "Kill all marked lines (not the files).
469 With a prefix argument, kill that many lines starting with the current line.
470 \(A negative argument kills lines before the current line.)
471 To kill an entire subdirectory, go to its directory header line
472 and use this command with a prefix argument (the value does not matter)."
473 ;; Returns count of killed lines. FMT="" suppresses message.
474 (interactive "P")
475 (if arg
476 (if (dired-get-subdir)
477 (dired-kill-subdir)
478 (dired-kill-line arg))
479 (save-excursion
480 (goto-char (point-min))
481 (let (buffer-read-only (count 0))
482 (if (not arg) ; kill marked lines
483 (let ((regexp (dired-marker-regexp)))
484 (while (and (not (eobp))
485 (re-search-forward regexp nil t))
486 (setq count (1+ count))
487 (delete-region (progn (beginning-of-line) (point))
488 (progn (forward-line 1) (point)))))
489 ;; else kill unmarked lines
490 (while (not (eobp))
491 (if (or (dired-between-files)
492 (not (looking-at "^ ")))
493 (forward-line 1)
494 (setq count (1+ count))
495 (delete-region (point) (save-excursion
496 (forward-line 1)
497 (point))))))
498 (or (equal "" fmt)
499 (message (or fmt "Killed %d line%s.") count (dired-plural-s count)))
500 count))))
502 ;;;###end dired-cmd.el
504 ;;; 30K
505 ;;;###begin dired-cp.el
507 (defun dired-compress ()
508 ;; Compress or uncompress the current file.
509 ;; Return nil for success, offending filename else.
510 (let* (buffer-read-only
511 (from-file (dired-get-filename))
512 (new-file (dired-compress-file from-file)))
513 (if new-file
514 (let ((start (point)))
515 ;; Remove any preexisting entry for the name NEW-FILE.
516 (condition-case nil
517 (dired-remove-entry new-file)
518 (error nil))
519 (goto-char start)
520 ;; Now replace the current line with an entry for NEW-FILE.
521 (dired-update-file-line new-file) nil)
522 (dired-log (concat "Failed to compress" from-file))
523 from-file)))
525 (defvar dired-compress-file-suffixes
526 '(("\\.gz\\'" "" "gunzip")
527 ("\\.tgz\\'" ".tar" "gunzip")
528 ("\\.Z\\'" "" "uncompress")
529 ;; For .z, try gunzip. It might be an old gzip file,
530 ;; or it might be from compact? pack? (which?) but gunzip handles both.
531 ("\\.z\\'" "" "gunzip")
532 ("\\.bz2\\'" "" "bunzip2")
533 ;; This item controls naming for compression.
534 ("\\.tar\\'" ".tgz" nil))
535 "Control changes in file name suffixes for compression and uncompression.
536 Each element specifies one transformation rule, and has the form:
537 (REGEXP NEW-SUFFIX PROGRAM)
538 The rule applies when the old file name matches REGEXP.
539 The new file name is computed by deleting the part that matches REGEXP
540 (as well as anything after that), then adding NEW-SUFFIX in its place.
541 If PROGRAM is non-nil, the rule is an uncompression rule,
542 and uncompression is done by running PROGRAM.
543 Otherwise, the rule is a compression rule, and compression is done with gzip.")
545 ;;;###autoload
546 (defun dired-compress-file (file)
547 ;; Compress or uncompress FILE.
548 ;; Return the name of the compressed or uncompressed file.
549 ;; Return nil if no change in files.
550 (let ((handler (find-file-name-handler file 'dired-compress-file))
551 suffix newname
552 (suffixes dired-compress-file-suffixes))
553 ;; See if any suffix rule matches this file name.
554 (while suffixes
555 (let (case-fold-search)
556 (if (string-match (car (car suffixes)) file)
557 (setq suffix (car suffixes) suffixes nil))
558 (setq suffixes (cdr suffixes))))
559 ;; If so, compute desired new name.
560 (if suffix
561 (setq newname (concat (substring file 0 (match-beginning 0))
562 (nth 1 suffix))))
563 (cond (handler
564 (funcall handler 'dired-compress-file file))
565 ((file-symlink-p file)
566 nil)
567 ((and suffix (nth 2 suffix))
568 ;; We found an uncompression rule.
569 (if (not (dired-check-process (concat "Uncompressing " file)
570 (nth 2 suffix) file))
571 newname))
573 ;;; We don't recognize the file as compressed, so compress it.
574 ;;; Try gzip; if we don't have that, use compress.
575 (condition-case nil
576 (if (not (dired-check-process (concat "Compressing " file)
577 "gzip" "-f" file))
578 (let ((out-name
579 (if (file-exists-p (concat file ".gz"))
580 (concat file ".gz")
581 (concat file ".z"))))
582 ;; Rename the compressed file to NEWNAME
583 ;; if it hasn't got that name already.
584 (if (and newname (not (equal newname out-name)))
585 (progn
586 (rename-file out-name newname t)
587 newname)
588 out-name)))
589 (file-error
590 (if (not (dired-check-process (concat "Compressing " file)
591 "compress" "-f" file))
592 ;; Don't use NEWNAME with `compress'.
593 (concat file ".Z"))))))))
595 (defun dired-mark-confirm (op-symbol arg)
596 ;; Request confirmation from the user that the operation described
597 ;; by OP-SYMBOL is to be performed on the marked files.
598 ;; Confirmation consists in a y-or-n question with a file list
599 ;; pop-up unless OP-SYMBOL is a member of `dired-no-confirm'.
600 ;; The files used are determined by ARG (as in dired-get-marked-files).
601 (or (eq dired-no-confirm t)
602 (memq op-symbol dired-no-confirm)
603 (let ((files (dired-get-marked-files t arg))
604 (string (if (eq op-symbol 'compress) "Compress or uncompress"
605 (capitalize (symbol-name op-symbol)))))
606 (dired-mark-pop-up nil op-symbol files (function y-or-n-p)
607 (concat string " "
608 (dired-mark-prompt arg files) "? ")))))
610 (defun dired-map-over-marks-check (fun arg op-symbol &optional show-progress)
611 ; "Map FUN over marked files (with second ARG like in dired-map-over-marks)
612 ; and display failures.
614 ; FUN takes zero args. It returns non-nil (the offending object, e.g.
615 ; the short form of the filename) for a failure and probably logs a
616 ; detailed error explanation using function `dired-log'.
618 ; OP-SYMBOL is a symbol describing the operation performed (e.g.
619 ; `compress'). It is used with `dired-mark-pop-up' to prompt the user
620 ; (e.g. with `Compress * [2 files]? ') and to display errors (e.g.
621 ; `Failed to compress 1 of 2 files - type W to see why ("foo")')
623 ; SHOW-PROGRESS if non-nil means redisplay dired after each file."
624 (if (dired-mark-confirm op-symbol arg)
625 (let* ((total-list;; all of FUN's return values
626 (dired-map-over-marks (funcall fun) arg show-progress))
627 (total (length total-list))
628 (failures (delq nil total-list))
629 (count (length failures))
630 (string (if (eq op-symbol 'compress) "Compress or uncompress"
631 (capitalize (symbol-name op-symbol)))))
632 (if (not failures)
633 (message "%s: %d file%s."
634 string total (dired-plural-s total))
635 ;; end this bunch of errors:
636 (dired-log-summary
637 (format "Failed to %s %d of %d file%s"
638 (downcase string) count total (dired-plural-s total))
639 failures)))))
641 (defvar dired-query-alist
642 '((?\y . y) (?\040 . y) ; `y' or SPC means accept once
643 (?n . n) (?\177 . n) ; `n' or DEL skips once
644 (?! . yes) ; `!' accepts rest
645 (?q. no) (?\e . no) ; `q' or ESC skips rest
646 ;; None of these keys quit - use C-g for that.
649 (defun dired-query (qs-var qs-prompt &rest qs-args)
650 ;; Query user and return nil or t.
651 ;; Store answer in symbol VAR (which must initially be bound to nil).
652 ;; Format PROMPT with ARGS.
653 ;; Binding variable help-form will help the user who types the help key.
654 (let* ((char (symbol-value qs-var))
655 (action (cdr (assoc char dired-query-alist))))
656 (cond ((eq 'yes action)
657 t) ; accept, and don't ask again
658 ((eq 'no action)
659 nil) ; skip, and don't ask again
660 (t;; no lasting effects from last time we asked - ask now
661 (let ((qprompt (concat qs-prompt
662 (if help-form
663 (format " [Type yn!q or %s] "
664 (key-description
665 (char-to-string help-char)))
666 " [Type y, n, q or !] ")))
667 result elt)
668 ;; Actually it looks nicer without cursor-in-echo-area - you can
669 ;; look at the dired buffer instead of at the prompt to decide.
670 (apply 'message qprompt qs-args)
671 (setq char (set qs-var (read-char)))
672 (while (not (setq elt (assoc char dired-query-alist)))
673 (message "Invalid char - type %c for help." help-char)
674 (ding)
675 (sit-for 1)
676 (apply 'message qprompt qs-args)
677 (setq char (set qs-var (read-char))))
678 (memq (cdr elt) '(t y yes)))))))
680 ;;;###autoload
681 (defun dired-do-compress (&optional arg)
682 "Compress or uncompress marked (or next ARG) files."
683 (interactive "P")
684 (dired-map-over-marks-check (function dired-compress) arg 'compress t))
686 ;; Commands for Emacs Lisp files - load and byte compile
688 (defun dired-byte-compile ()
689 ;; Return nil for success, offending file name else.
690 (let* ((filename (dired-get-filename))
691 elc-file buffer-read-only failure)
692 (condition-case err
693 (save-excursion (byte-compile-file filename))
694 (error
695 (setq failure err)))
696 (setq elc-file (byte-compile-dest-file filename))
697 (or (file-exists-p elc-file)
698 (setq failure t))
699 (if failure
700 (progn
701 (dired-log "Byte compile error for %s:\n%s\n" filename failure)
702 (dired-make-relative filename))
703 (dired-remove-file elc-file)
704 (forward-line) ; insert .elc after its .el file
705 (dired-add-file elc-file)
706 nil)))
708 ;;;###autoload
709 (defun dired-do-byte-compile (&optional arg)
710 "Byte compile marked (or next ARG) Emacs Lisp files."
711 (interactive "P")
712 (dired-map-over-marks-check (function dired-byte-compile) arg 'byte-compile t))
714 (defun dired-load ()
715 ;; Return nil for success, offending file name else.
716 (let ((file (dired-get-filename)) failure)
717 (condition-case err
718 (load file nil nil t)
719 (error (setq failure err)))
720 (if (not failure)
722 (dired-log "Load error for %s:\n%s\n" file failure)
723 (dired-make-relative file))))
725 ;;;###autoload
726 (defun dired-do-load (&optional arg)
727 "Load the marked (or next ARG) Emacs Lisp files."
728 (interactive "P")
729 (dired-map-over-marks-check (function dired-load) arg 'load t))
731 ;;;###autoload
732 (defun dired-do-redisplay (&optional arg test-for-subdir)
733 "Redisplay all marked (or next ARG) files.
734 If on a subdir line, redisplay that subdirectory. In that case,
735 a prefix arg lets you edit the `ls' switches used for the new listing."
736 ;; Moves point if the next ARG files are redisplayed.
737 (interactive "P\np")
738 (if (and test-for-subdir (dired-get-subdir))
739 (dired-insert-subdir
740 (dired-get-subdir)
741 (if arg (read-string "Switches for listing: " dired-actual-switches)))
742 (message "Redisplaying...")
743 ;; message much faster than making dired-map-over-marks show progress
744 (dired-uncache
745 (if (consp dired-directory) (car dired-directory) dired-directory))
746 (dired-map-over-marks (let ((fname (dired-get-filename)))
747 (message "Redisplaying... %s" fname)
748 (dired-update-file-line fname))
749 arg)
750 (dired-move-to-filename)
751 (message "Redisplaying...done")))
753 (defun dired-update-file-line (file)
754 ;; Delete the current line, and insert an entry for FILE.
755 ;; If FILE is nil, then just delete the current line.
756 ;; Keeps any marks that may be present in column one (doing this
757 ;; here is faster than with dired-add-entry's optional arg).
758 ;; Does not update other dired buffers. Use dired-relist-entry for that.
759 (beginning-of-line)
760 (let ((char (following-char)) (opoint (point))
761 (buffer-read-only))
762 (delete-region (point) (progn (forward-line 1) (point)))
763 (if file
764 (progn
765 (dired-add-entry file nil t)
766 ;; Replace space by old marker without moving point.
767 ;; Faster than goto+insdel inside a save-excursion?
768 (subst-char-in-region opoint (1+ opoint) ?\040 char))))
769 (dired-move-to-filename))
771 (defun dired-fun-in-all-buffers (directory file fun &rest args)
772 ;; In all buffers dired'ing DIRECTORY, run FUN with ARGS.
773 ;; If the buffer has a wildcard pattern, check that it matches FILE.
774 ;; (FILE does not include a directory component.)
775 ;; FILE may be nil, in which case ignore it.
776 ;; Return list of buffers where FUN succeeded (i.e., returned non-nil).
777 (let ((buf-list (dired-buffers-for-dir (expand-file-name directory)
778 file))
779 (obuf (current-buffer))
780 buf success-list)
781 (while buf-list
782 (setq buf (car buf-list)
783 buf-list (cdr buf-list))
784 (unwind-protect
785 (progn
786 (set-buffer buf)
787 (if (apply fun args)
788 (setq success-list (cons (buffer-name buf) success-list))))
789 (set-buffer obuf)))
790 success-list))
792 ;;;###autoload
793 (defun dired-add-file (filename &optional marker-char)
794 (dired-fun-in-all-buffers
795 (file-name-directory filename) (file-name-nondirectory filename)
796 (function dired-add-entry) filename marker-char))
798 (defun dired-add-entry (filename &optional marker-char relative)
799 ;; Add a new entry for FILENAME, optionally marking it
800 ;; with MARKER-CHAR (a character, else dired-marker-char is used).
801 ;; Note that this adds the entry `out of order' if files sorted by
802 ;; time, etc.
803 ;; At least this version inserts in the right subdirectory (if present).
804 ;; And it skips "." or ".." (see `dired-trivial-filenames').
805 ;; Hidden subdirs are exposed if a file is added there.
806 (setq filename (directory-file-name filename))
807 ;; Entry is always for files, even if they happen to also be directories
808 (let* ((opoint (point))
809 (cur-dir (dired-current-directory))
810 (orig-file-name filename)
811 (directory (if relative cur-dir (file-name-directory filename)))
812 reason)
813 (setq filename
814 (if relative
815 (file-relative-name filename directory)
816 (file-name-nondirectory filename))
817 reason
818 (catch 'not-found
819 (if (string= directory cur-dir)
820 (progn
821 (skip-chars-forward "^\r\n")
822 (if (eq (following-char) ?\r)
823 (dired-unhide-subdir))
824 ;; We are already where we should be, except when
825 ;; point is before the subdir line or its total line.
826 (let ((p (dired-after-subdir-garbage cur-dir)))
827 (if (< (point) p)
828 (goto-char p))))
829 ;; else try to find correct place to insert
830 (if (dired-goto-subdir directory)
831 (progn ;; unhide if necessary
832 (if (looking-at "\r") ;; point is at end of subdir line
833 (dired-unhide-subdir))
834 ;; found - skip subdir and `total' line
835 ;; and uninteresting files like . and ..
836 ;; This better not moves into the next subdir!
837 (dired-goto-next-nontrivial-file))
838 ;; not found
839 (throw 'not-found "Subdir not found")))
840 (let (buffer-read-only opoint)
841 (beginning-of-line)
842 (setq opoint (point))
843 (dired-add-entry-do-indentation marker-char)
844 ;; don't expand `.'. Show just the file name within directory.
845 (let ((default-directory directory))
846 (insert-directory filename
847 (concat dired-actual-switches "d")))
848 ;; Compensate for a bug in ange-ftp.
849 ;; It inserts the file's absolute name, rather than
850 ;; the relative one. That may be hard to fix since it
851 ;; is probably controlled by something in ftp.
852 (goto-char opoint)
853 (let ((inserted-name (dired-get-filename 'verbatim)))
854 (if (file-name-directory inserted-name)
855 (progn
856 (end-of-line)
857 (delete-char (- (length inserted-name)))
858 (insert filename)
859 (forward-char 1))
860 (forward-line 1)))
861 ;; Give each line a text property recording info about it.
862 (dired-insert-set-properties opoint (point))
863 (forward-line -1)
864 (if dired-after-readin-hook ;; the subdir-alist is not affected...
865 (save-excursion ;; ...so we can run it right now:
866 (save-restriction
867 (beginning-of-line)
868 (narrow-to-region (point) (save-excursion
869 (forward-line 1) (point)))
870 (run-hooks 'dired-after-readin-hook))))
871 (dired-move-to-filename))
872 ;; return nil if all went well
873 nil))
874 (if reason ; don't move away on failure
875 (goto-char opoint))
876 (not reason))) ; return t on success, nil else
878 ;; This is a separate function for the sake of nested dired format.
879 (defun dired-add-entry-do-indentation (marker-char)
880 ;; two spaces or a marker plus a space:
881 (insert (if marker-char
882 (if (integerp marker-char) marker-char dired-marker-char)
883 ?\040)
884 ?\040))
886 (defun dired-after-subdir-garbage (dir)
887 ;; Return pos of first file line of DIR, skipping header and total
888 ;; or wildcard lines.
889 ;; Important: never moves into the next subdir.
890 ;; DIR is assumed to be unhidden.
891 ;; Will probably be redefined for VMS etc.
892 (save-excursion
893 (or (dired-goto-subdir dir) (error "This cannot happen"))
894 (forward-line 1)
895 (while (and (not (eolp)) ; don't cross subdir boundary
896 (not (dired-move-to-filename)))
897 (forward-line 1))
898 (point)))
900 ;;;###autoload
901 (defun dired-remove-file (file)
902 (dired-fun-in-all-buffers
903 (file-name-directory file) (file-name-nondirectory file)
904 (function dired-remove-entry) file))
906 (defun dired-remove-entry (file)
907 (save-excursion
908 (and (dired-goto-file file)
909 (let (buffer-read-only)
910 (delete-region (progn (beginning-of-line) (point))
911 (save-excursion (forward-line 1) (point)))))))
913 ;;;###autoload
914 (defun dired-relist-file (file)
915 (dired-fun-in-all-buffers (file-name-directory file)
916 (file-name-nondirectory file)
917 (function dired-relist-entry) file))
919 (defun dired-relist-entry (file)
920 ;; Relist the line for FILE, or just add it if it did not exist.
921 ;; FILE must be an absolute file name.
922 (let (buffer-read-only marker)
923 ;; If cursor is already on FILE's line delete-region will cause
924 ;; save-excursion to fail because of floating makers,
925 ;; moving point to beginning of line. Sigh.
926 (save-excursion
927 (and (dired-goto-file file)
928 (delete-region (progn (beginning-of-line)
929 (setq marker (following-char))
930 (point))
931 (save-excursion (forward-line 1) (point))))
932 (setq file (directory-file-name file))
933 (dired-add-entry file (if (eq ?\040 marker) nil marker)))))
935 ;;; Copy, move/rename, making hard and symbolic links
937 (defcustom dired-recursive-copies nil
938 "*Decide whether recursive copies are allowed.
939 Nil means no recursive copies.
940 `always' means copy recursively without asking.
941 `top' means ask for each directory at top level.
942 Anything else means ask for each directory."
943 :type '(choice :tag "Copy directories"
944 (const :tag "No recursive copies" nil)
945 (const :tag "Ask for each directory" t)
946 (const :tag "Ask for each top directory only" top)
947 (const :tag "Copy directories without asking" always))
948 :group 'dired)
950 (defcustom dired-backup-overwrite nil
951 "*Non-nil if Dired should ask about making backups before overwriting files.
952 Special value `always' suppresses confirmation."
953 :type '(choice (const :tag "off" nil)
954 (const :tag "suppress" always)
955 (other :tag "ask" t))
956 :group 'dired)
958 (defvar dired-overwrite-confirmed)
960 (defun dired-handle-overwrite (to)
961 ;; Save old version of a to be overwritten file TO.
962 ;; `dired-overwrite-confirmed' and `overwrite-backup-query' are fluid vars
963 ;; from dired-create-files.
964 (let (backup)
965 (if (and dired-backup-overwrite
966 dired-overwrite-confirmed
967 (setq backup (car (find-backup-file-name to)))
968 (or (eq 'always dired-backup-overwrite)
969 (dired-query 'overwrite-backup-query
970 (format "Make backup for existing file `%s'? "
971 to))))
972 (progn
973 (rename-file to backup 0) ; confirm overwrite of old backup
974 (dired-relist-entry backup)))))
976 ;;;###autoload
977 (defun dired-copy-file (from to ok-flag)
978 (dired-handle-overwrite to)
979 (condition-case ()
980 (dired-copy-file-recursive from to ok-flag dired-copy-preserve-time t
981 dired-recursive-copies)
982 (file-date-error (message "Can't set date")
983 (sit-for 1))))
985 (defun dired-copy-file-recursive (from to ok-flag &optional
986 preserve-time top recursive)
987 (if (and recursive
988 (eq t (car (file-attributes from))) ; A directory, no symbolic link.
989 (or (eq recursive 'always)
990 (yes-or-no-p (format "Recursive copies of %s " from))))
991 (let ((files (directory-files from nil dired-re-no-dot)))
992 (if (eq recursive 'top) (setq recursive 'always)) ; Don't ask any more.
993 (if (file-exists-p to)
994 (or top (dired-handle-overwrite to))
995 (make-directory to))
996 (while files
997 (dired-copy-file-recursive
998 (expand-file-name (car files) from)
999 (expand-file-name (car files) to)
1000 ok-flag preserve-time nil recursive)
1001 (setq files (cdr files))))
1002 (or top (dired-handle-overwrite to)) ; Just a file.
1003 (copy-file from to ok-flag dired-copy-preserve-time)))
1005 ;;;###autoload
1006 (defun dired-rename-file (from to ok-flag)
1007 (dired-handle-overwrite to)
1008 (rename-file from to ok-flag) ; error is caught in -create-files
1009 ;; Silently rename the visited file of any buffer visiting this file.
1010 (and (get-file-buffer from)
1011 (with-current-buffer (get-file-buffer from)
1012 (set-visited-file-name to nil t)))
1013 (dired-remove-file from)
1014 ;; See if it's an inserted subdir, and rename that, too.
1015 (dired-rename-subdir from to))
1017 (defun dired-rename-subdir (from-dir to-dir)
1018 (setq from-dir (file-name-as-directory from-dir)
1019 to-dir (file-name-as-directory to-dir))
1020 (dired-fun-in-all-buffers from-dir nil
1021 (function dired-rename-subdir-1) from-dir to-dir)
1022 ;; Update visited file name of all affected buffers
1023 (let ((expanded-from-dir (expand-file-name from-dir))
1024 (blist (buffer-list)))
1025 (while blist
1026 (save-excursion
1027 (set-buffer (car blist))
1028 (if (and buffer-file-name
1029 (dired-in-this-tree buffer-file-name expanded-from-dir))
1030 (let ((modflag (buffer-modified-p))
1031 (to-file (dired-replace-in-string
1032 (concat "^" (regexp-quote from-dir))
1033 to-dir
1034 buffer-file-name)))
1035 (set-visited-file-name to-file)
1036 (set-buffer-modified-p modflag))))
1037 (setq blist (cdr blist)))))
1039 (defun dired-rename-subdir-1 (dir to)
1040 ;; Rename DIR to TO in headerlines and dired-subdir-alist, if DIR or
1041 ;; one of its subdirectories is expanded in this buffer.
1042 (let ((expanded-dir (expand-file-name dir))
1043 (alist dired-subdir-alist)
1044 (elt nil))
1045 (while alist
1046 (setq elt (car alist)
1047 alist (cdr alist))
1048 (if (dired-in-this-tree (car elt) expanded-dir)
1049 ;; ELT's subdir is affected by the rename
1050 (dired-rename-subdir-2 elt dir to)))
1051 (if (equal dir default-directory)
1052 ;; if top level directory was renamed, lots of things have to be
1053 ;; updated:
1054 (progn
1055 (dired-unadvertise dir) ; we no longer dired DIR...
1056 (setq default-directory to
1057 dired-directory (expand-file-name;; this is correct
1058 ;; with and without wildcards
1059 (file-name-nondirectory dired-directory)
1060 to))
1061 (let ((new-name (file-name-nondirectory
1062 (directory-file-name dired-directory))))
1063 ;; try to rename buffer, but just leave old name if new
1064 ;; name would already exist (don't try appending "<%d>")
1065 (or (get-buffer new-name)
1066 (rename-buffer new-name)))
1067 ;; ... we dired TO now:
1068 (dired-advertise)))))
1070 (defun dired-rename-subdir-2 (elt dir to)
1071 ;; Update the headerline and dired-subdir-alist element of directory
1072 ;; described by alist-element ELT to reflect the moving of DIR to TO.
1073 ;; Thus, ELT describes either DIR itself or a subdir of DIR.
1074 (save-excursion
1075 (let ((regexp (regexp-quote (directory-file-name dir)))
1076 (newtext (directory-file-name to))
1077 buffer-read-only)
1078 (goto-char (dired-get-subdir-min elt))
1079 ;; Update subdir headerline in buffer
1080 (if (not (looking-at dired-subdir-regexp))
1081 (error "%s not found where expected - dired-subdir-alist broken?"
1082 dir)
1083 (goto-char (match-beginning 1))
1084 (if (re-search-forward regexp (match-end 1) t)
1085 (replace-match newtext t t)
1086 (error "Expected to find `%s' in headerline of %s" dir (car elt))))
1087 ;; Update buffer-local dired-subdir-alist
1088 (setcar elt
1089 (dired-normalize-subdir
1090 (dired-replace-in-string regexp newtext (car elt)))))))
1092 ;; The basic function for half a dozen variations on cp/mv/ln/ln -s.
1093 (defun dired-create-files (file-creator operation fn-list name-constructor
1094 &optional marker-char)
1096 ;; Create a new file for each from a list of existing files. The user
1097 ;; is queried, dired buffers are updated, and at the end a success or
1098 ;; failure message is displayed
1100 ;; FILE-CREATOR must accept three args: oldfile newfile ok-if-already-exists
1102 ;; It is called for each file and must create newfile, the entry of
1103 ;; which will be added. The user will be queried if the file already
1104 ;; exists. If oldfile is removed by FILE-CREATOR (i.e, it is a
1105 ;; rename), it is FILE-CREATOR's responsibility to update dired
1106 ;; buffers. FILE-CREATOR must abort by signaling a file-error if it
1107 ;; could not create newfile. The error is caught and logged.
1109 ;; OPERATION (a capitalized string, e.g. `Copy') describes the
1110 ;; operation performed. It is used for error logging.
1112 ;; FN-LIST is the list of files to copy (full absolute file names).
1114 ;; NAME-CONSTRUCTOR returns a newfile for every oldfile, or nil to
1115 ;; skip. If it skips files for other reasons than a direct user
1116 ;; query, it is supposed to tell why (using dired-log).
1118 ;; Optional MARKER-CHAR is a character with which to mark every
1119 ;; newfile's entry, or t to use the current marker character if the
1120 ;; oldfile was marked.
1122 (let (failures skipped (success-count 0) (total (length fn-list)))
1123 (let (to overwrite-query
1124 overwrite-backup-query) ; for dired-handle-overwrite
1125 (mapcar
1126 (function
1127 (lambda (from)
1128 (setq to (funcall name-constructor from))
1129 (if (equal to from)
1130 (progn
1131 (setq to nil)
1132 (dired-log "Cannot %s to same file: %s\n"
1133 (downcase operation) from)))
1134 (if (not to)
1135 (setq skipped (cons (dired-make-relative from) skipped))
1136 (let* ((overwrite (file-exists-p to))
1137 (dired-overwrite-confirmed ; for dired-handle-overwrite
1138 (and overwrite
1139 (let ((help-form '(format "\
1140 Type SPC or `y' to overwrite file `%s',
1141 DEL or `n' to skip to next,
1142 ESC or `q' to not overwrite any of the remaining files,
1143 `!' to overwrite all remaining files with no more questions." to)))
1144 (dired-query 'overwrite-query
1145 "Overwrite `%s'?" to))))
1146 ;; must determine if FROM is marked before file-creator
1147 ;; gets a chance to delete it (in case of a move).
1148 (actual-marker-char
1149 (cond ((integerp marker-char) marker-char)
1150 (marker-char (dired-file-marker from)) ; slow
1151 (t nil))))
1152 (condition-case err
1153 (progn
1154 (funcall file-creator from to dired-overwrite-confirmed)
1155 (if overwrite
1156 ;; If we get here, file-creator hasn't been aborted
1157 ;; and the old entry (if any) has to be deleted
1158 ;; before adding the new entry.
1159 (dired-remove-file to))
1160 (setq success-count (1+ success-count))
1161 (message "%s: %d of %d" operation success-count total)
1162 (dired-add-file to actual-marker-char))
1163 (file-error ; FILE-CREATOR aborted
1164 (progn
1165 (setq failures (cons (dired-make-relative from) failures))
1166 (dired-log "%s `%s' to `%s' failed:\n%s\n"
1167 operation from to err))))))))
1168 fn-list))
1169 (cond
1170 (failures
1171 (dired-log-summary
1172 (format "%s failed for %d of %d file%s"
1173 operation (length failures) total
1174 (dired-plural-s total))
1175 failures))
1176 (skipped
1177 (dired-log-summary
1178 (format "%s: %d of %d file%s skipped"
1179 operation (length skipped) total
1180 (dired-plural-s total))
1181 skipped))
1183 (message "%s: %s file%s"
1184 operation success-count (dired-plural-s success-count)))))
1185 (dired-move-to-filename))
1187 (defun dired-do-create-files (op-symbol file-creator operation arg
1188 &optional marker-char op1
1189 how-to)
1190 "Create a new file for each marked file.
1191 Prompts user for target, which is a directory in which to create
1192 the new files. Target may be a plain file if only one marked
1193 file exists.
1194 OP-SYMBOL is the symbol for the operation. Function `dired-mark-pop-up'
1195 will determine whether pop-ups are appropriate for this OP-SYMBOL.
1196 FILE-CREATOR and OPERATION as in `dired-create-files'.
1197 ARG as in `dired-get-marked-files'.
1198 Optional arg MARKER-CHAR as in `dired-create-files'.
1199 Optional arg OP1 is an alternate form for OPERATION if there is
1200 only one file.
1201 Optional arg HOW-TO is used to set the value of the into-dir variable
1202 which determines how to treat target.
1203 If into-dir is set to nil then target is not regarded as a directory,
1204 there must be exactly one marked file, else error.
1205 Else if into-dir is set to a list, then target is a generalized
1206 directory (e.g. some sort of archive). The first element of into-dir
1207 must be a function with at least four arguments:
1208 operation as OPERATION above.
1209 rfn-list a list of the relative names for the marked files.
1210 fn-list a list of the absolute names for the marked files.
1211 target.
1212 The rest of into-dir are optional arguments.
1213 Else into-dir is not a list. Target is a directory.
1214 The marked file(s) are created inside the target directory.
1216 If HOW-TO is not given (or nil), then into-dir is set to true if
1217 target is a directory and otherwise to nil.
1218 Else if HOW-TO is t, then into-dir is set to nil.
1219 Else HOW-TO is assumed to be a function of one argument, target,
1220 that looks at target and returns a value for the into-dir
1221 variable. The function `dired-into-dir-with-symlinks' is provided
1222 for the case (common when creating symlinks) that symbolic
1223 links to directories are not to be considered as directories
1224 (as `file-directory-p' would if HOW-TO had been nil)."
1225 (or op1 (setq op1 operation))
1226 (let* ((fn-list (dired-get-marked-files nil arg))
1227 (rfn-list (mapcar (function dired-make-relative) fn-list))
1228 (dired-one-file ; fluid variable inside dired-create-files
1229 (and (consp fn-list) (null (cdr fn-list)) (car fn-list)))
1230 (target-dir (dired-dwim-target-directory))
1231 (default (and dired-one-file
1232 (expand-file-name (file-name-nondirectory (car fn-list))
1233 target-dir)))
1234 (target (expand-file-name ; fluid variable inside dired-create-files
1235 (dired-mark-read-file-name
1236 (concat (if dired-one-file op1 operation) " %s to: ")
1237 target-dir op-symbol arg rfn-list default)))
1238 (into-dir (cond ((null how-to)
1239 ;; Allow DOS/Windows users to change the letter
1240 ;; case of a directory. If we don't test these
1241 ;; conditions up front, file-directory-p below
1242 ;; will return t because the filesystem is
1243 ;; case-insensitive, and Emacs will try to move
1244 ;; foo -> foo/foo, which fails.
1245 (if (and (memq system-type '(ms-dos windows-nt))
1246 (eq op-symbol 'move)
1247 dired-one-file
1248 (string= (downcase
1249 (expand-file-name (car fn-list)))
1250 (downcase
1251 (expand-file-name target)))
1252 (not (string=
1253 (file-name-nondirectory (car fn-list))
1254 (file-name-nondirectory target))))
1256 (file-directory-p target)))
1257 ((eq how-to t) nil)
1258 (t (funcall how-to target)))))
1259 (if (and (consp into-dir) (functionp (car into-dir)))
1260 (apply (car into-dir) operation rfn-list fn-list target (cdr into-dir))
1261 (if (not (or dired-one-file into-dir))
1262 (error "Marked %s: target must be a directory: %s" operation target))
1263 ;; rename-file bombs when moving directories unless we do this:
1264 (or into-dir (setq target (directory-file-name target)))
1265 (dired-create-files
1266 file-creator operation fn-list
1267 (if into-dir ; target is a directory
1268 ;; This function uses fluid variable target when called
1269 ;; inside dired-create-files:
1270 (function
1271 (lambda (from)
1272 (expand-file-name (file-name-nondirectory from) target)))
1273 (function (lambda (from) target)))
1274 marker-char))))
1276 ;; Read arguments for a marked-files command that wants a file name,
1277 ;; perhaps popping up the list of marked files.
1278 ;; ARG is the prefix arg and indicates whether the files came from
1279 ;; marks (ARG=nil) or a repeat factor (integerp ARG).
1280 ;; If the current file was used, the list has but one element and ARG
1281 ;; does not matter. (It is non-nil, non-integer in that case, namely '(4)).
1282 ;; DEFAULT is the default value to return if the user just hits RET;
1283 ;; if it is omitted or nil, then the name of the directory is used.
1285 (defun dired-mark-read-file-name (prompt dir op-symbol arg files
1286 &optional default)
1287 (dired-mark-pop-up
1288 nil op-symbol files
1289 (function read-file-name)
1290 (format prompt (dired-mark-prompt arg files)) dir default))
1292 (defun dired-dwim-target-directory ()
1293 ;; Try to guess which target directory the user may want.
1294 ;; If there is a dired buffer displayed in the next window, use
1295 ;; its current subdir, else use current subdir of this dired buffer.
1296 (let ((this-dir (and (eq major-mode 'dired-mode)
1297 (dired-current-directory))))
1298 ;; non-dired buffer may want to profit from this function, e.g. vm-uudecode
1299 (if dired-dwim-target
1300 (let* ((other-buf (window-buffer (next-window)))
1301 (other-dir (save-excursion
1302 (set-buffer other-buf)
1303 (and (eq major-mode 'dired-mode)
1304 (dired-current-directory)))))
1305 (or other-dir this-dir))
1306 this-dir)))
1308 ;;;###autoload
1309 (defun dired-create-directory (directory)
1310 "Create a directory called DIRECTORY."
1311 (interactive
1312 (list (read-file-name "Create directory: " (dired-current-directory))))
1313 (let ((expanded (directory-file-name (expand-file-name directory))))
1314 (make-directory expanded)
1315 (dired-add-file expanded)
1316 (dired-move-to-filename)))
1318 (defun dired-into-dir-with-symlinks (target)
1319 (and (file-directory-p target)
1320 (not (file-symlink-p target))))
1321 ;; This may not always be what you want, especially if target is your
1322 ;; home directory and it happens to be a symbolic link, as is often the
1323 ;; case with NFS and automounters. Or if you want to make symlinks
1324 ;; into directories that themselves are only symlinks, also quite
1325 ;; common.
1327 ;; So we don't use this function as value for HOW-TO in
1328 ;; dired-do-symlink, which has the minor disadvantage of
1329 ;; making links *into* a symlinked-dir, when you really wanted to
1330 ;; *overwrite* that symlink. In that (rare, I guess) case, you'll
1331 ;; just have to remove that symlink by hand before making your marked
1332 ;; symlinks.
1334 (defvar dired-copy-how-to-fn nil
1335 "Nil or a function used by `dired-do-copy' to determine target.
1336 See HOW-TO argument for `dired-do-create-files'.")
1338 ;;;###autoload
1339 (defun dired-do-copy (&optional arg)
1340 "Copy all marked (or next ARG) files, or copy the current file.
1341 This normally preserves the last-modified date when copying.
1342 When operating on just the current file, you specify the new name.
1343 When operating on multiple or marked files, you specify a directory,
1344 and new copies of these files are made in that directory
1345 with the same names that the files currently have."
1346 (interactive "P")
1347 (let ((dired-recursive-copies dired-recursive-copies))
1348 (dired-do-create-files 'copy (function dired-copy-file)
1349 (if dired-copy-preserve-time "Copy [-p]" "Copy")
1350 arg dired-keep-marker-copy
1351 nil dired-copy-how-to-fn)))
1353 ;;;###autoload
1354 (defun dired-do-symlink (&optional arg)
1355 "Make symbolic links to current file or all marked (or next ARG) files.
1356 When operating on just the current file, you specify the new name.
1357 When operating on multiple or marked files, you specify a directory
1358 and new symbolic links are made in that directory
1359 with the same names that the files currently have."
1360 (interactive "P")
1361 (dired-do-create-files 'symlink (function make-symbolic-link)
1362 "Symlink" arg dired-keep-marker-symlink))
1364 ;;;###autoload
1365 (defun dired-do-hardlink (&optional arg)
1366 "Add names (hard links) current file or all marked (or next ARG) files.
1367 When operating on just the current file, you specify the new name.
1368 When operating on multiple or marked files, you specify a directory
1369 and new hard links are made in that directory
1370 with the same names that the files currently have."
1371 (interactive "P")
1372 (dired-do-create-files 'hardlink (function add-name-to-file)
1373 "Hardlink" arg dired-keep-marker-hardlink))
1375 ;;;###autoload
1376 (defun dired-do-rename (&optional arg)
1377 "Rename current file or all marked (or next ARG) files.
1378 When renaming just the current file, you specify the new name.
1379 When renaming multiple or marked files, you specify a directory."
1380 (interactive "P")
1381 (dired-do-create-files 'move (function dired-rename-file)
1382 "Move" arg dired-keep-marker-rename "Rename"))
1383 ;;;###end dired-cp.el
1385 ;;; 5K
1386 ;;;###begin dired-re.el
1387 (defun dired-do-create-files-regexp
1388 (file-creator operation arg regexp newname &optional whole-path marker-char)
1389 ;; Create a new file for each marked file using regexps.
1390 ;; FILE-CREATOR and OPERATION as in dired-create-files.
1391 ;; ARG as in dired-get-marked-files.
1392 ;; Matches each marked file against REGEXP and constructs the new
1393 ;; filename from NEWNAME (like in function replace-match).
1394 ;; Optional arg WHOLE-PATH means match/replace the whole file name
1395 ;; instead of only the non-directory part of the file.
1396 ;; Optional arg MARKER-CHAR as in dired-create-files.
1397 (let* ((fn-list (dired-get-marked-files nil arg))
1398 (fn-count (length fn-list))
1399 (operation-prompt (concat operation " `%s' to `%s'?"))
1400 (rename-regexp-help-form (format "\
1401 Type SPC or `y' to %s one match, DEL or `n' to skip to next,
1402 `!' to %s all remaining matches with no more questions."
1403 (downcase operation)
1404 (downcase operation)))
1405 (regexp-name-constructor
1406 ;; Function to construct new filename using REGEXP and NEWNAME:
1407 (if whole-path ; easy (but rare) case
1408 (function
1409 (lambda (from)
1410 (let ((to (dired-string-replace-match regexp from newname))
1411 ;; must bind help-form directly around call to
1412 ;; dired-query
1413 (help-form rename-regexp-help-form))
1414 (if to
1415 (and (dired-query 'rename-regexp-query
1416 operation-prompt
1417 from
1420 (dired-log "%s: %s did not match regexp %s\n"
1421 operation from regexp)))))
1422 ;; not whole-path, replace non-directory part only
1423 (function
1424 (lambda (from)
1425 (let* ((new (dired-string-replace-match
1426 regexp (file-name-nondirectory from) newname))
1427 (to (and new ; nil means there was no match
1428 (expand-file-name new
1429 (file-name-directory from))))
1430 (help-form rename-regexp-help-form))
1431 (if to
1432 (and (dired-query 'rename-regexp-query
1433 operation-prompt
1434 (dired-make-relative from)
1435 (dired-make-relative to))
1437 (dired-log "%s: %s did not match regexp %s\n"
1438 operation (file-name-nondirectory from) regexp)))))))
1439 rename-regexp-query)
1440 (dired-create-files
1441 file-creator operation fn-list regexp-name-constructor marker-char)))
1443 (defun dired-mark-read-regexp (operation)
1444 ;; Prompt user about performing OPERATION.
1445 ;; Read and return list of: regexp newname arg whole-path.
1446 (let* ((whole-path
1447 (equal 0 (prefix-numeric-value current-prefix-arg)))
1448 (arg
1449 (if whole-path nil current-prefix-arg))
1450 (regexp
1451 (dired-read-regexp
1452 (concat (if whole-path "Path " "") operation " from (regexp): ")))
1453 (newname
1454 (read-string
1455 (concat (if whole-path "Path " "") operation " " regexp " to: "))))
1456 (list regexp newname arg whole-path)))
1458 ;;;###autoload
1459 (defun dired-do-rename-regexp (regexp newname &optional arg whole-path)
1460 "Rename marked files containing REGEXP to NEWNAME.
1461 As each match is found, the user must type a character saying
1462 what to do with it. For directions, type \\[help-command] at that time.
1463 NEWNAME may contain \\=\\<n> or \\& as in `query-replace-regexp'.
1464 REGEXP defaults to the last regexp used.
1466 With a zero prefix arg, renaming by regexp affects the absolute file name.
1467 Normally, only the non-directory part of the file name is used and changed."
1468 (interactive (dired-mark-read-regexp "Rename"))
1469 (dired-do-create-files-regexp
1470 (function dired-rename-file)
1471 "Rename" arg regexp newname whole-path dired-keep-marker-rename))
1473 ;;;###autoload
1474 (defun dired-do-copy-regexp (regexp newname &optional arg whole-path)
1475 "Copy all marked files containing REGEXP to NEWNAME.
1476 See function `dired-do-rename-regexp' for more info."
1477 (interactive (dired-mark-read-regexp "Copy"))
1478 (let ((dired-recursive-copies nil)) ; No recursive copies.
1479 (dired-do-create-files-regexp
1480 (function dired-copy-file)
1481 (if dired-copy-preserve-time "Copy [-p]" "Copy")
1482 arg regexp newname whole-path dired-keep-marker-copy)))
1484 ;;;###autoload
1485 (defun dired-do-hardlink-regexp (regexp newname &optional arg whole-path)
1486 "Hardlink all marked files containing REGEXP to NEWNAME.
1487 See function `dired-do-rename-regexp' for more info."
1488 (interactive (dired-mark-read-regexp "HardLink"))
1489 (dired-do-create-files-regexp
1490 (function add-name-to-file)
1491 "HardLink" arg regexp newname whole-path dired-keep-marker-hardlink))
1493 ;;;###autoload
1494 (defun dired-do-symlink-regexp (regexp newname &optional arg whole-path)
1495 "Symlink all marked files containing REGEXP to NEWNAME.
1496 See function `dired-do-rename-regexp' for more info."
1497 (interactive (dired-mark-read-regexp "SymLink"))
1498 (dired-do-create-files-regexp
1499 (function make-symbolic-link)
1500 "SymLink" arg regexp newname whole-path dired-keep-marker-symlink))
1502 (defun dired-create-files-non-directory
1503 (file-creator basename-constructor operation arg)
1504 ;; Perform FILE-CREATOR on the non-directory part of marked files
1505 ;; using function BASENAME-CONSTRUCTOR, with query for each file.
1506 ;; OPERATION like in dired-create-files, ARG as in dired-get-marked-files.
1507 (let (rename-non-directory-query)
1508 (dired-create-files
1509 file-creator
1510 operation
1511 (dired-get-marked-files nil arg)
1512 (function
1513 (lambda (from)
1514 (let ((to (concat (file-name-directory from)
1515 (funcall basename-constructor
1516 (file-name-nondirectory from)))))
1517 (and (let ((help-form (format "\
1518 Type SPC or `y' to %s one file, DEL or `n' to skip to next,
1519 `!' to %s all remaining matches with no more questions."
1520 (downcase operation)
1521 (downcase operation))))
1522 (dired-query 'rename-non-directory-query
1523 (concat operation " `%s' to `%s'")
1524 (dired-make-relative from)
1525 (dired-make-relative to)))
1526 to))))
1527 dired-keep-marker-rename)))
1529 (defun dired-rename-non-directory (basename-constructor operation arg)
1530 (dired-create-files-non-directory
1531 (function dired-rename-file)
1532 basename-constructor operation arg))
1534 ;;;###autoload
1535 (defun dired-upcase (&optional arg)
1536 "Rename all marked (or next ARG) files to upper case."
1537 (interactive "P")
1538 (dired-rename-non-directory (function upcase) "Rename upcase" arg))
1540 ;;;###autoload
1541 (defun dired-downcase (&optional arg)
1542 "Rename all marked (or next ARG) files to lower case."
1543 (interactive "P")
1544 (dired-rename-non-directory (function downcase) "Rename downcase" arg))
1546 ;;;###end dired-re.el
1548 ;;; 13K
1549 ;;;###begin dired-ins.el
1551 ;;;###autoload
1552 (defun dired-maybe-insert-subdir (dirname &optional
1553 switches no-error-if-not-dir-p)
1554 "Insert this subdirectory into the same dired buffer.
1555 If it is already present, just move to it (type \\[dired-do-redisplay] to refresh),
1556 else inserts it at its natural place (as `ls -lR' would have done).
1557 With a prefix arg, you may edit the ls switches used for this listing.
1558 You can add `R' to the switches to expand the whole tree starting at
1559 this subdirectory.
1560 This function takes some pains to conform to `ls -lR' output."
1561 (interactive
1562 (list (dired-get-filename)
1563 (if current-prefix-arg
1564 (read-string "Switches for listing: " dired-actual-switches))))
1565 (let ((opoint (point)))
1566 ;; We don't need a marker for opoint as the subdir is always
1567 ;; inserted *after* opoint.
1568 (setq dirname (file-name-as-directory dirname))
1569 (or (and (not switches)
1570 (dired-goto-subdir dirname))
1571 (dired-insert-subdir dirname switches no-error-if-not-dir-p))
1572 ;; Push mark so that it's easy to find back. Do this after the
1573 ;; insert message so that the user sees the `Mark set' message.
1574 (push-mark opoint)))
1576 ;;;###autoload
1577 (defun dired-insert-subdir (dirname &optional switches no-error-if-not-dir-p)
1578 "Insert this subdirectory into the same dired buffer.
1579 If it is already present, overwrites previous entry,
1580 else inserts it at its natural place (as `ls -lR' would have done).
1581 With a prefix arg, you may edit the `ls' switches used for this listing.
1582 You can add `R' to the switches to expand the whole tree starting at
1583 this subdirectory.
1584 This function takes some pains to conform to `ls -lR' output."
1585 ;; NO-ERROR-IF-NOT-DIR-P needed for special filesystems like
1586 ;; Prospero where dired-ls does the right thing, but
1587 ;; file-directory-p has not been redefined.
1588 (interactive
1589 (list (dired-get-filename)
1590 (if current-prefix-arg
1591 (read-string "Switches for listing: " dired-actual-switches))))
1592 (setq dirname (file-name-as-directory (expand-file-name dirname)))
1593 (dired-insert-subdir-validate dirname switches)
1594 (or no-error-if-not-dir-p
1595 (file-directory-p dirname)
1596 (error "Attempt to insert a non-directory: %s" dirname))
1597 (let ((elt (assoc dirname dired-subdir-alist))
1598 switches-have-R mark-alist case-fold-search buffer-read-only)
1599 ;; case-fold-search is nil now, so we can test for capital `R':
1600 (if (setq switches-have-R (and switches (string-match "R" switches)))
1601 ;; avoid duplicated subdirs
1602 (setq mark-alist (dired-kill-tree dirname t)))
1603 (if elt
1604 ;; If subdir is already present, remove it and remember its marks
1605 (setq mark-alist (nconc (dired-insert-subdir-del elt) mark-alist))
1606 (dired-insert-subdir-newpos dirname)) ; else compute new position
1607 (dired-insert-subdir-doupdate
1608 dirname elt (dired-insert-subdir-doinsert dirname switches))
1609 (if switches-have-R (dired-build-subdir-alist))
1610 (dired-initial-position dirname)
1611 (save-excursion (dired-mark-remembered mark-alist))))
1613 ;; This is a separate function for dired-vms.
1614 (defun dired-insert-subdir-validate (dirname &optional switches)
1615 ;; Check that it is valid to insert DIRNAME with SWITCHES.
1616 ;; Signal an error if invalid (e.g. user typed `i' on `..').
1617 (or (dired-in-this-tree dirname (expand-file-name default-directory))
1618 (error "%s: not in this directory tree" dirname))
1619 (if switches
1620 (let (case-fold-search)
1621 (mapcar
1622 (function
1623 (lambda (x)
1624 (or (eq (null (string-match x switches))
1625 (null (string-match x dired-actual-switches)))
1626 (error "Can't have dirs with and without -%s switches together"
1627 x))))
1628 ;; all switches that make a difference to dired-get-filename:
1629 '("F" "b")))))
1631 (defun dired-alist-add (dir new-marker)
1632 ;; Add new DIR at NEW-MARKER. Sort alist.
1633 (dired-alist-add-1 dir new-marker)
1634 (dired-alist-sort))
1636 (defun dired-alist-sort ()
1637 ;; Keep the alist sorted on buffer position.
1638 (setq dired-subdir-alist
1639 (sort dired-subdir-alist
1640 (function (lambda (elt1 elt2)
1641 (> (dired-get-subdir-min elt1)
1642 (dired-get-subdir-min elt2)))))))
1644 (defun dired-kill-tree (dirname &optional remember-marks)
1645 "Kill all proper subdirs of DIRNAME, excluding DIRNAME itself.
1646 With optional arg REMEMBER-MARKS, return an alist of marked files."
1647 (interactive "DKill tree below directory: ")
1648 (setq dirname (expand-file-name dirname))
1649 (let ((s-alist dired-subdir-alist) dir m-alist)
1650 (while s-alist
1651 (setq dir (car (car s-alist))
1652 s-alist (cdr s-alist))
1653 (if (and (not (string-equal dir dirname))
1654 (dired-in-this-tree dir dirname)
1655 (dired-goto-subdir dir))
1656 (setq m-alist (nconc (dired-kill-subdir remember-marks) m-alist))))
1657 m-alist))
1659 (defun dired-insert-subdir-newpos (new-dir)
1660 ;; Find pos for new subdir, according to tree order.
1661 ;;(goto-char (point-max))
1662 (let ((alist dired-subdir-alist) elt dir pos new-pos)
1663 (while alist
1664 (setq elt (car alist)
1665 alist (cdr alist)
1666 dir (car elt)
1667 pos (dired-get-subdir-min elt))
1668 (if (dired-tree-lessp dir new-dir)
1669 ;; Insert NEW-DIR after DIR
1670 (setq new-pos (dired-get-subdir-max elt)
1671 alist nil)))
1672 (goto-char new-pos))
1673 ;; want a separating newline between subdirs
1674 (or (eobp)
1675 (forward-line -1))
1676 (insert "\n")
1677 (point))
1679 (defun dired-insert-subdir-del (element)
1680 ;; Erase an already present subdir (given by ELEMENT) from buffer.
1681 ;; Move to that buffer position. Return a mark-alist.
1682 (let ((begin-marker (dired-get-subdir-min element)))
1683 (goto-char begin-marker)
1684 ;; Are at beginning of subdir (and inside it!). Now determine its end:
1685 (goto-char (dired-subdir-max))
1686 (or (eobp);; want a separating newline _between_ subdirs:
1687 (forward-char -1))
1688 (prog1
1689 (dired-remember-marks begin-marker (point))
1690 (delete-region begin-marker (point)))))
1692 (defun dired-insert-subdir-doinsert (dirname switches)
1693 ;; Insert ls output after point and put point on the correct
1694 ;; position for the subdir alist.
1695 ;; Return the boundary of the inserted text (as list of BEG and END).
1696 (let ((begin (point)) end)
1697 (message "Reading directory %s..." dirname)
1698 (let ((dired-actual-switches
1699 (or switches
1700 (dired-replace-in-string "R" "" dired-actual-switches))))
1701 (if (equal dirname (car (car (reverse dired-subdir-alist))))
1702 ;; top level directory may contain wildcards:
1703 (dired-readin-insert dired-directory)
1704 (let ((opoint (point)))
1705 (insert-directory dirname dired-actual-switches nil t)
1706 (dired-insert-set-properties opoint (point)))))
1707 (message "Reading directory %s...done" dirname)
1708 (setq end (point-marker))
1709 (indent-rigidly begin end 2)
1710 ;; call dired-insert-headerline afterwards, as under VMS dired-ls
1711 ;; does insert the headerline itself and the insert function just
1712 ;; moves point.
1713 ;; Need a marker for END as this inserts text.
1714 (goto-char begin)
1715 (if (not (looking-at "^ /.*:$"))
1716 (dired-insert-headerline dirname))
1717 ;; point is now like in dired-build-subdir-alist
1718 (prog1
1719 (list begin (marker-position end))
1720 (set-marker end nil))))
1722 (defun dired-insert-subdir-doupdate (dirname elt beg-end)
1723 ;; Point is at the correct subdir alist position for ELT,
1724 ;; BEG-END is the subdir-region (as list of begin and end).
1725 (if elt ; subdir was already present
1726 ;; update its position (should actually be unchanged)
1727 (set-marker (dired-get-subdir-min elt) (point-marker))
1728 (dired-alist-add dirname (point-marker)))
1729 ;; The hook may depend on the subdir-alist containing the just
1730 ;; inserted subdir, so run it after dired-alist-add:
1731 (if dired-after-readin-hook
1732 (save-excursion
1733 (let ((begin (nth 0 beg-end))
1734 (end (nth 1 beg-end)))
1735 (goto-char begin)
1736 (save-restriction
1737 (narrow-to-region begin end)
1738 ;; hook may add or delete lines, but the subdir boundary
1739 ;; marker floats
1740 (run-hooks 'dired-after-readin-hook))))))
1742 (defun dired-tree-lessp (dir1 dir2)
1743 ;; Lexicographic order on file name components, like `ls -lR':
1744 ;; DIR1 < DIR2 iff DIR1 comes *before* DIR2 in an `ls -lR' listing,
1745 ;; i.e., iff DIR1 is a (grand)parent dir of DIR2,
1746 ;; or DIR1 and DIR2 are in the same parentdir and their last
1747 ;; components are string-lessp.
1748 ;; Thus ("/usr/" "/usr/bin") and ("/usr/a/" "/usr/b/") are tree-lessp.
1749 ;; string-lessp could arguably be replaced by file-newer-than-file-p
1750 ;; if dired-actual-switches contained `t'.
1751 (setq dir1 (file-name-as-directory dir1)
1752 dir2 (file-name-as-directory dir2))
1753 (let ((components-1 (dired-split "/" dir1))
1754 (components-2 (dired-split "/" dir2)))
1755 (while (and components-1
1756 components-2
1757 (equal (car components-1) (car components-2)))
1758 (setq components-1 (cdr components-1)
1759 components-2 (cdr components-2)))
1760 (let ((c1 (car components-1))
1761 (c2 (car components-2)))
1763 (cond ((and c1 c2)
1764 (string-lessp c1 c2))
1765 ((and (null c1) (null c2))
1766 nil) ; they are equal, not lessp
1767 ((null c1) ; c2 is a subdir of c1: c1<c2
1769 ((null c2) ; c1 is a subdir of c2: c1>c2
1770 nil)
1771 (t (error "This can't happen"))))))
1773 ;; There should be a builtin split function - inverse to mapconcat.
1774 (defun dired-split (pat str &optional limit)
1775 "Splitting on regexp PAT, turn string STR into a list of substrings.
1776 Optional third arg LIMIT (>= 1) is a limit to the length of the
1777 resulting list.
1778 Thus, if SEP is a regexp that only matches itself,
1780 (mapconcat 'identity (dired-split SEP STRING) SEP)
1782 is always equal to STRING."
1783 (let* ((start (string-match pat str))
1784 (result (list (substring str 0 start)))
1785 (count 1)
1786 (end (if start (match-end 0))))
1787 (if end ; else nothing left
1788 (while (and (or (not (integerp limit))
1789 (< count limit))
1790 (string-match pat str end))
1791 (setq start (match-beginning 0)
1792 count (1+ count)
1793 result (cons (substring str end start) result)
1794 end (match-end 0)
1795 start end)
1797 (if (and (or (not (integerp limit))
1798 (< count limit))
1799 end) ; else nothing left
1800 (setq result
1801 (cons (substring str end) result)))
1802 (nreverse result)))
1804 ;;; moving by subdirectories
1806 ;;;###autoload
1807 (defun dired-prev-subdir (arg &optional no-error-if-not-found no-skip)
1808 "Go to previous subdirectory, regardless of level.
1809 When called interactively and not on a subdir line, go to this subdir's line."
1810 ;;(interactive "p")
1811 (interactive
1812 (list (if current-prefix-arg
1813 (prefix-numeric-value current-prefix-arg)
1814 ;; if on subdir start already, don't stay there!
1815 (if (dired-get-subdir) 1 0))))
1816 (dired-next-subdir (- arg) no-error-if-not-found no-skip))
1818 (defun dired-subdir-min ()
1819 (save-excursion
1820 (if (not (dired-prev-subdir 0 t t))
1821 (error "Not in a subdir!")
1822 (point))))
1824 ;;;###autoload
1825 (defun dired-goto-subdir (dir)
1826 "Go to end of header line of DIR in this dired buffer.
1827 Return value of point on success, otherwise return nil.
1828 The next char is either \\n, or \\r if DIR is hidden."
1829 (interactive
1830 (prog1 ; let push-mark display its message
1831 (list (expand-file-name
1832 (completing-read "Goto in situ directory: " ; prompt
1833 dired-subdir-alist ; table
1834 nil ; predicate
1835 t ; require-match
1836 (dired-current-directory))))
1837 (push-mark)))
1838 (setq dir (file-name-as-directory dir))
1839 (let ((elt (assoc dir dired-subdir-alist)))
1840 (and elt
1841 (goto-char (dired-get-subdir-min elt))
1842 ;; dired-subdir-hidden-p and dired-add-entry depend on point being
1843 ;; at either \r or \n after this function succeeds.
1844 (progn (skip-chars-forward "^\r\n")
1845 (point)))))
1847 ;;;###autoload
1848 (defun dired-mark-subdir-files ()
1849 "Mark all files except `.' and `..' in current subdirectory.
1850 If the Dired buffer shows multiple directories, this command
1851 marks the files listed in the subdirectory that point is in."
1852 (interactive)
1853 (let ((p-min (dired-subdir-min)))
1854 (dired-mark-files-in-region p-min (dired-subdir-max))))
1856 ;;;###autoload
1857 (defun dired-kill-subdir (&optional remember-marks)
1858 "Remove all lines of current subdirectory.
1859 Lower levels are unaffected."
1860 ;; With optional REMEMBER-MARKS, return a mark-alist.
1861 (interactive)
1862 (let ((beg (dired-subdir-min))
1863 (end (dired-subdir-max))
1864 buffer-read-only cur-dir)
1865 (setq cur-dir (dired-current-directory))
1866 (if (equal cur-dir default-directory)
1867 (error "Attempt to kill top level directory"))
1868 (prog1
1869 (if remember-marks (dired-remember-marks beg end))
1870 (delete-region beg end)
1871 (if (eobp) ; don't leave final blank line
1872 (delete-char -1))
1873 (dired-unsubdir cur-dir))))
1875 (defun dired-unsubdir (dir)
1876 ;; Remove DIR from the alist
1877 (setq dired-subdir-alist
1878 (delq (assoc dir dired-subdir-alist) dired-subdir-alist)))
1880 ;;;###autoload
1881 (defun dired-tree-up (arg)
1882 "Go up ARG levels in the dired tree."
1883 (interactive "p")
1884 (let ((dir (dired-current-directory)))
1885 (while (>= arg 1)
1886 (setq arg (1- arg)
1887 dir (file-name-directory (directory-file-name dir))))
1888 ;;(setq dir (expand-file-name dir))
1889 (or (dired-goto-subdir dir)
1890 (error "Cannot go up to %s - not in this tree." dir))))
1892 ;;;###autoload
1893 (defun dired-tree-down ()
1894 "Go down in the dired tree."
1895 (interactive)
1896 (let ((dir (dired-current-directory)) ; has slash
1897 pos case-fold-search) ; filenames are case sensitive
1898 (let ((rest (reverse dired-subdir-alist)) elt)
1899 (while rest
1900 (setq elt (car rest)
1901 rest (cdr rest))
1902 (if (dired-in-this-tree (directory-file-name (car elt)) dir)
1903 (setq rest nil
1904 pos (dired-goto-subdir (car elt))))))
1905 (if pos
1906 (goto-char pos)
1907 (error "At the bottom"))))
1909 ;;; hiding
1911 (defun dired-unhide-subdir ()
1912 (let (buffer-read-only)
1913 (subst-char-in-region (dired-subdir-min) (dired-subdir-max) ?\r ?\n)))
1915 (defun dired-hide-check ()
1916 (or selective-display
1917 (error "selective-display must be t for subdir hiding to work!")))
1919 (defun dired-subdir-hidden-p (dir)
1920 (and selective-display
1921 (save-excursion
1922 (dired-goto-subdir dir)
1923 (looking-at "\r"))))
1925 ;;;###autoload
1926 (defun dired-hide-subdir (arg)
1927 "Hide or unhide the current subdirectory and move to next directory.
1928 Optional prefix arg is a repeat factor.
1929 Use \\[dired-hide-all] to (un)hide all directories."
1930 (interactive "p")
1931 (dired-hide-check)
1932 (while (>= (setq arg (1- arg)) 0)
1933 (let* ((cur-dir (dired-current-directory))
1934 (hidden-p (dired-subdir-hidden-p cur-dir))
1935 (elt (assoc cur-dir dired-subdir-alist))
1936 (end-pos (1- (dired-get-subdir-max elt)))
1937 buffer-read-only)
1938 ;; keep header line visible, hide rest
1939 (goto-char (dired-get-subdir-min elt))
1940 (skip-chars-forward "^\n\r")
1941 (if hidden-p
1942 (subst-char-in-region (point) end-pos ?\r ?\n)
1943 (subst-char-in-region (point) end-pos ?\n ?\r)))
1944 (dired-next-subdir 1 t)))
1946 ;;;###autoload
1947 (defun dired-hide-all (arg)
1948 "Hide all subdirectories, leaving only their header lines.
1949 If there is already something hidden, make everything visible again.
1950 Use \\[dired-hide-subdir] to (un)hide a particular subdirectory."
1951 (interactive "P")
1952 (dired-hide-check)
1953 (let (buffer-read-only)
1954 (if (save-excursion
1955 (goto-char (point-min))
1956 (search-forward "\r" nil t))
1957 ;; unhide - bombs on \r in filenames
1958 (subst-char-in-region (point-min) (point-max) ?\r ?\n)
1959 ;; hide
1960 (let ((pos (point-max)) ; pos of end of last directory
1961 (alist dired-subdir-alist))
1962 (while alist ; while there are dirs before pos
1963 (subst-char-in-region (dired-get-subdir-min (car alist)) ; pos of prev dir
1964 (save-excursion
1965 (goto-char pos) ; current dir
1966 ;; we're somewhere on current dir's line
1967 (forward-line -1)
1968 (point))
1969 ?\n ?\r)
1970 (setq pos (dired-get-subdir-min (car alist))) ; prev dir gets current dir
1971 (setq alist (cdr alist)))))))
1973 ;;;###end dired-ins.el
1976 ;; Functions for searching in tags style among marked files.
1978 ;;;###autoload
1979 (defun dired-do-search (regexp)
1980 "Search through all marked files for a match for REGEXP.
1981 Stops when a match is found.
1982 To continue searching for next match, use command \\[tags-loop-continue]."
1983 (interactive "sSearch marked files (regexp): ")
1984 (tags-search regexp '(dired-get-marked-files)))
1986 ;;;###autoload
1987 (defun dired-do-query-replace-regexp (from to &optional delimited)
1988 "Do `query-replace-regexp' of FROM with TO, on all marked files.
1989 Third arg DELIMITED (prefix arg) means replace only word-delimited matches.
1990 If you exit (\\[keyboard-quit] or ESC), you can resume the query replace
1991 with the command \\[tags-loop-continue]."
1992 (interactive
1993 "sQuery replace in marked files (regexp): \nsQuery replace %s by: \nP")
1994 (tags-query-replace from to delimited '(dired-get-marked-files)))
1996 ;;;###autoload
1997 (defun dired-show-file-type (file &optional deref-symlinks)
1998 "Print the type of FILE, according to the `file' command.
1999 If FILE is a symbolic link and the optional argument DEREF-SYMLINKS is
2000 true then the type of the file linked to by FILE is printed instead."
2001 (interactive (list (dired-get-filename t) current-prefix-arg))
2002 (with-temp-buffer
2003 (if deref-symlinks
2004 (call-process "file" nil t t "-L" file)
2005 (call-process "file" nil t t file))
2006 (when (bolp)
2007 (backward-delete-char 1))
2008 (message (buffer-string))))
2010 (provide 'dired-aux)
2012 ;;; dired-aux.el ends here