lisp/dired-x.el

   1 ;;; dired-x.el --- extra Dired functionality
   2
   3 ;; Copyright (C) 1993-1994, 1997, 2001-2011 Free Software Foundation, Inc.
   4
   5 ;; Author: Sebastian Kremer <sk@thp.uni-koeln.de>
   6 ;;      Lawrence R. Dodd <dodd@roebling.poly.edu>
   7 ;; Maintainer: Romain Francoise <rfrancoise@gnu.org>
   8 ;; Keywords: dired extensions files
   9 ;; Package: emacs
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software: you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation, either version 3 of the License, or
  16 ;; (at your option) any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 ;;; Commentary:
  27
  28 ;; This is based on Sebastian Kremer's excellent dired-x.el (Dired Extra),
  29 ;; version 1.191, adapted for GNU Emacs.  See the `dired-x' info pages.
  30
  31 ;; USAGE: In your ~/.emacs,
  32 ;;
  33 ;; (add-hook 'dired-load-hook
  34 ;;           (lambda ()
  35 ;;                       (load "dired-x")
  36 ;;                       ;; Set global variables here.  For example:
  37 ;;                       ;; (setq dired-guess-shell-gnutar "gtar")
  38 ;;                       ))
  39 ;; (add-hook 'dired-mode-hook
  40 ;;           (lambda ()
  41 ;;                       ;; Set buffer-local variables here.  For example:
  42 ;;                       ;; (dired-omit-mode 1)
  43 ;;                       ))
  44 ;;
  45 ;; At load time dired-x.el will install itself and bind some dired keys.
  46 ;; Some dired.el and dired-aux.el functions have extra features if
  47 ;; dired-x is loaded.
  48
  49 ;; User customization: M-x customize-group RET dired-x RET.
  50
  51 ;; *Please* see the `dired-x' info pages for more details.
  52
  53 \f
  54 ;;; Code:
  55
  56 ;; This is a no-op if dired-x is being loaded via `dired-load-hook',
  57 ;; but maybe not if a dired-x function is being autoloaded.
  58 (require 'dired)
  59
  60 ;;; User-defined variables.
  61
  62 (defgroup dired-x nil
  63   "Extended directory editing (dired-x)."
  64   :group 'dired)
  65
  66 (defgroup dired-keys nil
  67   "Dired keys customizations."
  68   :prefix "dired-"
  69   :group 'dired-x)
  70
  71 (defcustom dired-bind-vm nil
  72   "Non-nil means \"V\" runs `dired-vm', otherwise \"V\" runs `dired-rmail'.
  73 RMAIL files in the old Babyl format (used before before Emacs 23.1)
  74 contain \"-*- rmail -*-\" at the top, so `dired-find-file'
  75 will run `rmail' on these files.  New RMAIL files use the standard
  76 mbox format, and so cannot be distinguished in this way."
  77   :type 'boolean
  78   :group 'dired-keys)
  79
  80 (defcustom dired-bind-jump t
  81   "Non-nil means bind `dired-jump' to C-x C-j, otherwise do not.
  82 Setting this variable directly after dired-x is loaded has no effect -
  83 use \\[customize]."
  84   :type 'boolean
  85   :set (lambda (sym val)
  86          (if (set sym val)
  87              (progn
  88                (define-key global-map "\C-x\C-j" 'dired-jump)
  89                (define-key global-map "\C-x4\C-j" 'dired-jump-other-window))
  90            (if (eq 'dired-jump (lookup-key global-map "\C-x\C-j"))
  91                (define-key global-map "\C-x\C-j" nil))
  92            (if (eq 'dired-jump-other-window (lookup-key global-map "\C-x4\C-j"))
  93                (define-key global-map "\C-x4\C-j" nil))))
  94   :group 'dired-keys)
  95
  96 (defcustom dired-bind-man t
  97   "Non-nil means bind `dired-man' to \"N\" in dired-mode, otherwise do not.
  98 Setting this variable directly after dired-x is loaded has no effect -
  99 use \\[customize]."
 100   :type 'boolean
 101   :set (lambda (sym val)
 102          (if (set sym val)
 103              (define-key dired-mode-map "N" 'dired-man)
 104            (if (eq 'dired-man (lookup-key dired-mode-map "N"))
 105                (define-key dired-mode-map "N" nil))))
 106   :group 'dired-keys)
 107
 108 (defcustom dired-bind-info t
 109   "Non-nil means bind `dired-info' to \"I\" in dired-mode, otherwise do not.
 110 Setting this variable directly after dired-x is loaded has no effect -
 111 use \\[customize]."
 112   :type 'boolean
 113   :set (lambda (sym val)
 114          (if (set sym val)
 115              (define-key dired-mode-map "I" 'dired-info)
 116            (if (eq 'dired-info (lookup-key dired-mode-map "I"))
 117                (define-key dired-mode-map "I" nil))))
 118   :group 'dired-keys)
 119
 120 (defcustom dired-vm-read-only-folders nil
 121   "If non-nil, \\[dired-vm] will visit all folders read-only.
 122 If neither nil nor t, e.g. the symbol `if-file-read-only', only
 123 files not writable by you are visited read-only."
 124   :type '(choice (const :tag "off" nil)
 125                  (const :tag "on" t)
 126                  (other :tag "non-writable only" if-file-read-only))
 127   :group 'dired-x)
 128
 129 (defcustom dired-omit-size-limit 30000
 130   "Maximum size for the \"omitting\" feature.
 131 If nil, there is no maximum size."
 132   :type '(choice (const :tag "no maximum" nil) integer)
 133   :group 'dired-x)
 134
 135 (define-minor-mode dired-omit-mode
 136   "Toggle omission of uninteresting files in Dired (Dired-Omit mode).
 137 With a prefix argument ARG, enable Dired-Omit mode if ARG is
 138 positive, and disable it otherwise.  If called from Lisp, enable
 139 the mode if ARG is omitted or nil.
 140
 141 Dired-Omit mode is a buffer-local minor mode.  When enabled in a
 142 Dired buffer, Dired does not list files whose filenames match
 143 regexp `dired-omit-files', nor files ending with extensions in
 144 `dired-omit-extensions'.
 145
 146 To enable omitting in every Dired buffer, you can put this in
 147 your init file:
 148
 149   (add-hook 'dired-mode-hook (lambda () (dired-omit-mode)))
 150
 151 See Info node `(dired-x) Omitting Variables' for more information."
 152   :group 'dired-x
 153   (if dired-omit-mode
 154       ;; This will mention how many lines were omitted:
 155       (let ((dired-omit-size-limit nil)) (dired-omit-expunge))
 156     (revert-buffer)))
 157
 158 (put 'dired-omit-mode 'safe-local-variable 'booleanp)
 159
 160 ;; For backward compatibility
 161 (define-obsolete-variable-alias 'dired-omit-files-p 'dired-omit-mode "22.1")
 162
 163 (defcustom dired-omit-files "^\\.?#\\|^\\.$\\|^\\.\\.$"
 164   "Filenames matching this regexp will not be displayed.
 165 This only has effect when `dired-omit-mode' is t.  See interactive function
 166 `dired-omit-mode' \(\\[dired-omit-mode]\) and variable
 167 `dired-omit-extensions'.  The default is to omit  `.', `..', auto-save
 168 files and lock files."
 169   :type 'regexp
 170   :group 'dired-x)
 171
 172 (defcustom dired-omit-verbose t
 173   "When non-nil, show messages when omitting files.
 174 When nil, don't show messages."
 175   :type 'boolean
 176   :group 'dired-x)
 177
 178 (defcustom dired-find-subdir nil           ; t is pretty near to DWIM...
 179   "If non-nil, Dired always finds a directory in a buffer of its own.
 180 If nil, Dired finds the directory as a subdirectory in some other buffer
 181 if it is present as one.
 182
 183 If there are several dired buffers for a directory, the most recently
 184 used is chosen.
 185
 186 Dired avoids switching to the current buffer, so that if you have
 187 a normal and a wildcard buffer for the same directory, \\[dired] will
 188 toggle between those two."
 189   :type 'boolean
 190   :group 'dired-x)
 191
 192 (defcustom dired-enable-local-variables t
 193   "Control use of local-variables lists in Dired.
 194 This temporarily overrides the value of `enable-local-variables' when
 195 listing a directory.  See also `dired-local-variables-file'."
 196   :risky t
 197   :type '(choice (const :tag "Query Unsafe" t)
 198                  (const :tag "Safe Only" :safe)
 199                  (const :tag "Do all" :all)
 200                  (const :tag "Ignore" nil)
 201                  (other :tag "Query" other))
 202   :group 'dired-x)
 203
 204 (make-obsolete-variable 'dired-enable-local-variables
 205                         "use a standard `dir-locals-file' instead." "24.1")
 206
 207 (defcustom dired-guess-shell-gnutar
 208   (catch 'found
 209     (dolist (exe '("tar" "gtar"))
 210       (if (with-temp-buffer
 211             (ignore-errors (call-process exe nil t nil "--version"))
 212             (and (re-search-backward "GNU tar" nil t) t))
 213           (throw 'found exe))))
 214   "If non-nil, name of GNU tar executable.
 215 \(E.g., \"tar\" or \"gtar\").  The `z' switch will be used with it for
 216 compressed or gzip'ed tar files.  If you don't have GNU tar, set this
 217 to nil: a pipe using `zcat' or `gunzip -c' will be used."
 218   ;; Changed from system-type test to testing --version output.
 219   ;; Maybe test --help for -z instead?
 220   :version "24.1"
 221   :type '(choice (const :tag "Not GNU tar" nil)
 222                  (string :tag "Command name"))
 223   :group 'dired-x)
 224
 225 (defcustom dired-guess-shell-gzip-quiet t
 226   "Non-nil says pass -q to gzip overriding verbose GZIP environment."
 227   :type 'boolean
 228   :group 'dired-x)
 229
 230 (defcustom dired-guess-shell-znew-switches nil
 231   "If non-nil, then string of switches passed to `znew', example: \"-K\"."
 232   :type '(choice (const :tag "None" nil)
 233                  (string :tag "Switches"))
 234   :group 'dired-x)
 235
 236 (defcustom dired-clean-up-buffers-too t
 237   "Non-nil means offer to kill buffers visiting files and dirs deleted in Dired."
 238   :type 'boolean
 239   :group 'dired-x)
 240
 241 ;;; KEY BINDINGS.
 242
 243 (define-key dired-mode-map "\M-o" 'dired-omit-mode)
 244 (define-key dired-mode-map "*O" 'dired-mark-omitted)
 245 (define-key dired-mode-map "\M-(" 'dired-mark-sexp)
 246 (define-key dired-mode-map "*(" 'dired-mark-sexp)
 247 (define-key dired-mode-map "*." 'dired-mark-extension)
 248 (define-key dired-mode-map "\M-!" 'dired-smart-shell-command)
 249 (define-key dired-mode-map "\M-G" 'dired-goto-subdir)
 250 (define-key dired-mode-map "F" 'dired-do-find-marked-files)
 251 (define-key dired-mode-map "Y"  'dired-do-relsymlink)
 252 (define-key dired-mode-map "%Y" 'dired-do-relsymlink-regexp)
 253 (define-key dired-mode-map "V" 'dired-do-run-mail)
 254
 255 ;;; MENU BINDINGS
 256
 257 (require 'easymenu)
 258
 259 (let ((menu (lookup-key dired-mode-map [menu-bar])))
 260   (easy-menu-add-item menu '("Operate")
 261                       ["Find Files" dired-do-find-marked-files
 262                        :help "Find current or marked files"]
 263                       "Shell Command...")
 264   (easy-menu-add-item menu '("Operate")
 265                       ["Relative Symlink to..." dired-do-relsymlink
 266                        :visible (fboundp 'make-symbolic-link)
 267                        :help "Make relative symbolic links for current or \
 268 marked files"]
 269                       "Hardlink to...")
 270   (easy-menu-add-item menu '("Mark")
 271                       ["Flag Extension..." dired-flag-extension
 272                        :help "Flag files with a certain extension for deletion"]
 273                       "Mark Executables")
 274   (easy-menu-add-item menu '("Mark")
 275                       ["Mark Extension..." dired-mark-extension
 276                        :help "Mark files with a certain extension"]
 277                       "Unmark All")
 278   (easy-menu-add-item menu '("Mark")
 279                       ["Mark Omitted" dired-mark-omitted
 280                        :help "Mark files matching `dired-omit-files' \
 281 and `dired-omit-extensions'"]
 282                       "Unmark All")
 283   (easy-menu-add-item menu '("Regexp")
 284                       ["Relative Symlink..." dired-do-relsymlink-regexp
 285                        :visible (fboundp 'make-symbolic-link)
 286                        :help "Make relative symbolic links for files \
 287 matching regexp"]
 288                       "Hardlink...")
 289   (easy-menu-add-item menu '("Immediate")
 290                       ["Omit Mode" dired-omit-mode
 291                        :style toggle :selected dired-omit-mode
 292                        :help "Enable or disable omitting \"uninteresting\" \
 293 files"]
 294                       "Refresh"))
 295
 296 \f
 297 ;; Install into appropriate hooks.
 298
 299 (add-hook 'dired-mode-hook 'dired-extra-startup)
 300 (add-hook 'dired-after-readin-hook 'dired-omit-expunge)
 301
 302 (defun dired-extra-startup ()
 303   "Automatically put on `dired-mode-hook' to get extra Dired features:
 304 \\<dired-mode-map>
 305   \\[dired-do-run-mail]\t-- run mail on folder (see `dired-bind-vm')
 306   \\[dired-info]\t-- run info on file
 307   \\[dired-man]\t-- run man on file
 308   \\[dired-do-find-marked-files]\t-- visit all marked files simultaneously
 309   \\[dired-omit-mode]\t-- toggle omitting of files
 310   \\[dired-mark-sexp]\t-- mark by Lisp expression
 311
 312 To see the options you can set, use M-x customize-group RET dired-x RET.
 313 See also the functions:
 314   `dired-flag-extension'
 315   `dired-virtual'
 316   `dired-jump'
 317   `dired-man'
 318   `dired-vm'
 319   `dired-rmail'
 320   `dired-info'
 321   `dired-do-find-marked-files'"
 322   (interactive)
 323   ;; These must be done in each new dired buffer.
 324   (dired-hack-local-variables)
 325   (dired-omit-startup))
 326
 327 \f
 328 ;;; EXTENSION MARKING FUNCTIONS.
 329
 330 ;; Mark files with some extension.
 331 (defun dired-mark-extension (extension &optional marker-char)
 332   "Mark all files with a certain EXTENSION for use in later commands.
 333 A `.' is *not* automatically prepended to the string entered."
 334   ;; EXTENSION may also be a list of extensions instead of a single one.
 335   ;; Optional MARKER-CHAR is marker to use.
 336   (interactive "sMarking extension: \nP")
 337   (or (listp extension)
 338       (setq extension (list extension)))
 339   (dired-mark-files-regexp
 340    (concat ".";; don't match names with nothing but an extension
 341            "\\("
 342            (mapconcat 'regexp-quote extension "\\|")
 343            "\\)$")
 344    marker-char))
 345
 346 (defun dired-flag-extension (extension)
 347   "In dired, flag all files with a certain EXTENSION for deletion.
 348 A `.' is *not* automatically prepended to the string entered."
 349   (interactive "sFlagging extension: ")
 350   (dired-mark-extension extension dired-del-marker))
 351
 352 ;; Define some unpopular file extensions.  Used for cleaning and omitting.
 353
 354 (defvar dired-patch-unclean-extensions
 355   '(".rej" ".orig")
 356   "List of extensions of dispensable files created by the `patch' program.")
 357
 358 (defvar dired-tex-unclean-extensions
 359   '(".toc" ".log" ".aux");; these are already in completion-ignored-extensions
 360   "List of extensions of dispensable files created by TeX.")
 361
 362 (defvar dired-latex-unclean-extensions
 363   '(".idx" ".lof" ".lot" ".glo")
 364   "List of extensions of dispensable files created by LaTeX.")
 365
 366 (defvar dired-bibtex-unclean-extensions
 367   '(".blg" ".bbl")
 368   "List of extensions of dispensable files created by BibTeX.")
 369
 370 (defvar dired-texinfo-unclean-extensions
 371   '(".cp" ".cps" ".fn" ".fns" ".ky" ".kys" ".pg" ".pgs"
 372     ".tp" ".tps" ".vr" ".vrs")
 373   "List of extensions of dispensable files created by texinfo.")
 374
 375 (defun dired-clean-patch ()
 376   "Flag dispensable files created by patch for deletion.
 377 See variable `dired-patch-unclean-extensions'."
 378   (interactive)
 379   (dired-flag-extension dired-patch-unclean-extensions))
 380
 381 (defun dired-clean-tex ()
 382   "Flag dispensable files created by [La]TeX etc. for deletion.
 383 See variables `dired-tex-unclean-extensions',
 384 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions' and
 385 `dired-texinfo-unclean-extensions'."
 386   (interactive)
 387   (dired-flag-extension (append dired-texinfo-unclean-extensions
 388                                 dired-latex-unclean-extensions
 389                                 dired-bibtex-unclean-extensions
 390                                 dired-tex-unclean-extensions)))
 391
 392 (defun dired-very-clean-tex ()
 393   "Flag dispensable files created by [La]TeX *and* \".dvi\" for deletion.
 394 See variables `dired-texinfo-unclean-extensions',
 395 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions' and
 396 `dired-texinfo-unclean-extensions'."
 397   (interactive)
 398   (dired-flag-extension (append dired-texinfo-unclean-extensions
 399                                 dired-latex-unclean-extensions
 400                                 dired-bibtex-unclean-extensions
 401                                 dired-tex-unclean-extensions
 402                                 (list ".dvi"))))
 403 \f
 404 ;;; JUMP.
 405
 406 ;;;###autoload
 407 (defun dired-jump (&optional other-window file-name)
 408   "Jump to dired buffer corresponding to current buffer.
 409 If in a file, dired the current directory and move to file's line.
 410 If in Dired already, pop up a level and goto old directory's line.
 411 In case the proper dired file line cannot be found, refresh the dired
 412 buffer and try again.
 413 When OTHER-WINDOW is non-nil, jump to dired buffer in other window.
 414 Interactively with prefix argument, read FILE-NAME and
 415 move to its line in dired."
 416   (interactive
 417    (list nil (and current-prefix-arg
 418                   (read-file-name "Jump to dired file: "))))
 419   (let* ((file (or file-name buffer-file-name))
 420          (dir (if file (file-name-directory file) default-directory)))
 421     (if (and (eq major-mode 'dired-mode) (null file-name))
 422         (progn
 423           (setq dir (dired-current-directory))
 424           (dired-up-directory other-window)
 425           (unless (dired-goto-file dir)
 426               ;; refresh and try again
 427             (dired-insert-subdir (file-name-directory dir))
 428             (dired-goto-file dir)))
 429       (if other-window
 430           (dired-other-window dir)
 431         (dired dir))
 432       (if file
 433           (or (dired-goto-file file)
 434               ;; refresh and try again
 435               (progn
 436                 (dired-insert-subdir (file-name-directory file))
 437                 (dired-goto-file file))
 438               ;; Toggle omitting, if it is on, and try again.
 439               (when dired-omit-mode
 440                 (dired-omit-mode)
 441                 (dired-goto-file file)))))))
 442
 443 ;;;###autoload
 444 (defun dired-jump-other-window (&optional file-name)
 445   "Like \\[dired-jump] (`dired-jump') but in other window."
 446   (interactive
 447    (list (and current-prefix-arg
 448               (read-file-name "Jump to dired file: "))))
 449   (dired-jump t file-name))
 450 \f
 451 ;;; OMITTING.
 452
 453 ;; Enhanced omitting of lines from directory listings.
 454 ;; Marked files are never omitted.
 455
 456 ;; should probably get rid of this and always use 'no-dir.
 457 ;; sk 28-Aug-1991 09:37
 458 (defvar dired-omit-localp 'no-dir
 459   "The LOCALP argument `dired-omit-expunge' passes to `dired-get-filename'.
 460 If it is `no-dir', omitting is much faster, but you can only match
 461 against the non-directory part of the file name.  Set it to nil if you
 462 need to match the entire file name.")
 463
 464 ;; \017=^O for Omit - other packages can chose other control characters.
 465 (defvar dired-omit-marker-char ?\017
 466   "Temporary marker used by Dired-Omit.
 467 Should never be used as marker by the user or other packages.")
 468
 469 (defun dired-omit-startup ()
 470   (or (assq 'dired-omit-mode minor-mode-alist)
 471       (setq minor-mode-alist
 472             (append '((dired-omit-mode
 473                        (:eval (if (eq major-mode 'dired-mode)
 474                                   " Omit" ""))))
 475                     minor-mode-alist))))
 476
 477 (defun dired-mark-omitted ()
 478   "Mark files matching `dired-omit-files' and `dired-omit-extensions'."
 479   (interactive)
 480   (let ((dired-omit-mode nil)) (revert-buffer)) ;; Show omitted files
 481   (dired-mark-unmarked-files (dired-omit-regexp) nil nil dired-omit-localp))
 482
 483 (defcustom dired-omit-extensions
 484   (append completion-ignored-extensions
 485           dired-latex-unclean-extensions
 486           dired-bibtex-unclean-extensions
 487           dired-texinfo-unclean-extensions)
 488   "If non-nil, a list of extensions \(strings\) to omit from Dired listings.
 489 Defaults to elements of `completion-ignored-extensions',
 490 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions', and
 491 `dired-texinfo-unclean-extensions'.
 492
 493 See interactive function `dired-omit-mode' \(\\[dired-omit-mode]\) and
 494 variables `dired-omit-mode' and `dired-omit-files'."
 495   :type '(repeat string)
 496   :group 'dired-x)
 497
 498 (defun dired-omit-expunge (&optional regexp)
 499   "Erases all unmarked files matching REGEXP.
 500 Does nothing if global variable `dired-omit-mode' is nil, or if called
 501   non-interactively and buffer is bigger than `dired-omit-size-limit'.
 502 If REGEXP is nil or not specified, uses `dired-omit-files', and also omits
 503   filenames ending in `dired-omit-extensions'.
 504 If REGEXP is the empty string, this function is a no-op.
 505
 506 This functions works by temporarily binding `dired-marker-char' to
 507 `dired-omit-marker-char' and calling `dired-do-kill-lines'."
 508   (interactive "sOmit files (regexp): ")
 509   (if (and dired-omit-mode
 510            (or (called-interactively-p 'interactive)
 511                (not dired-omit-size-limit)
 512                (< (buffer-size) dired-omit-size-limit)
 513                (progn
 514                  (when dired-omit-verbose
 515                    (message "Not omitting: directory larger than %d characters."
 516                             dired-omit-size-limit))
 517                  (setq dired-omit-mode nil)
 518                  nil)))
 519       (let ((omit-re (or regexp (dired-omit-regexp)))
 520             (old-modified-p (buffer-modified-p))
 521             count)
 522         (or (string= omit-re "")
 523             (let ((dired-marker-char dired-omit-marker-char))
 524               (when dired-omit-verbose (message "Omitting..."))
 525               (if (dired-mark-unmarked-files omit-re nil nil dired-omit-localp)
 526                   (progn
 527                     (setq count (dired-do-kill-lines
 528                                  nil
 529                                  (if dired-omit-verbose "Omitted %d line%s." "")))
 530                     (force-mode-line-update))
 531                 (when dired-omit-verbose (message "(Nothing to omit)")))))
 532         ;; Try to preserve modified state of buffer.  So `%*' doesn't appear
 533         ;; in mode-line of omitted buffers.
 534         (set-buffer-modified-p (and old-modified-p
 535                                     (save-excursion
 536                                       (goto-char (point-min))
 537                                       (re-search-forward dired-re-mark nil t))))
 538         count)))
 539
 540 (defun dired-omit-regexp ()
 541   (concat (if dired-omit-files (concat "\\(" dired-omit-files "\\)") "")
 542           (if (and dired-omit-files dired-omit-extensions) "\\|" "")
 543           (if dired-omit-extensions
 544               (concat ".";; a non-extension part should exist
 545                       "\\("
 546                       (mapconcat 'regexp-quote dired-omit-extensions "\\|")
 547                       "\\)$")
 548             "")))
 549
 550 ;; Returns t if any work was done, nil otherwise.
 551 (defun dired-mark-unmarked-files (regexp msg &optional unflag-p localp)
 552   "Mark unmarked files matching REGEXP, displaying MSG.
 553 REGEXP is matched against the entire file name.  When called
 554 interactively, prompt for REGEXP.
 555 With prefix argument, unflag all those files.
 556 Optional fourth argument LOCALP is as in `dired-get-filename'."
 557   (interactive
 558    (list (dired-read-regexp
 559           "Mark unmarked files matching regexp (default all): ")
 560          nil current-prefix-arg nil))
 561   (let ((dired-marker-char (if unflag-p ?\s dired-marker-char)))
 562     (dired-mark-if
 563      (and
 564       ;; not already marked
 565       (looking-at " ")
 566       ;; uninteresting
 567       (let ((fn (dired-get-filename localp t)))
 568         (and fn (string-match regexp fn))))
 569      msg)))
 570
 571 \f
 572 ;;; VIRTUAL DIRED MODE.
 573
 574 ;; For browsing `ls -lR' listings in a dired-like fashion.
 575
 576 (defalias 'virtual-dired 'dired-virtual)
 577 (defun dired-virtual (dirname &optional switches)
 578   "Put this buffer into Virtual Dired mode.
 579
 580 In Virtual Dired mode, all commands that do not actually consult the
 581 filesystem will work.
 582
 583 This is useful if you want to peruse and move around in an ls -lR
 584 output file, for example one you got from an ftp server.  With
 585 ange-ftp, you can even dired a directory containing an ls-lR file,
 586 visit that file and turn on virtual dired mode.  But don't try to save
 587 this file, as dired-virtual indents the listing and thus changes the
 588 buffer.
 589
 590 If you have save a Dired buffer in a file you can use \\[dired-virtual] to
 591 resume it in a later session.
 592
 593 Type \\<dired-mode-map>\\[revert-buffer] \
 594 in the Virtual Dired buffer and answer `y' to convert
 595 the virtual to a real dired buffer again.  You don't have to do this, though:
 596 you can relist single subdirs using \\[dired-do-redisplay]."
 597
 598   ;; DIRNAME is the top level directory of the buffer.  It will become
 599   ;; its `default-directory'.  If nil, the old value of
 600   ;; default-directory is used.
 601
 602   ;; Optional SWITCHES are the ls switches to use.
 603
 604   ;; Shell wildcards will be used if there already is a `wildcard'
 605   ;; line in the buffer (thus it is a saved Dired buffer), but there
 606   ;; is no other way to get wildcards.  Insert a `wildcard' line by
 607   ;; hand if you want them.
 608
 609   (interactive
 610    (list (read-string "Virtual Dired directory: " (dired-virtual-guess-dir))))
 611   (goto-char (point-min))
 612   (or (looking-at "  ")
 613       ;; if not already indented, do it now:
 614       (indent-region (point-min) (point-max) 2))
 615   (or dirname (setq dirname default-directory))
 616   (setq dirname (expand-file-name (file-name-as-directory dirname)))
 617   (setq default-directory dirname)      ; contains no wildcards
 618   (let ((wildcard (save-excursion
 619                     (goto-char (point-min))
 620                     (forward-line 1)
 621                     (and (looking-at "^  wildcard ")
 622                          (buffer-substring (match-end 0)
 623                                            (line-end-position))))))
 624   (if wildcard
 625         (setq dirname (expand-file-name wildcard default-directory))))
 626   ;; If raw ls listing (not a saved old dired buffer), give it a
 627   ;; decent subdir headerline:
 628   (goto-char (point-min))
 629   (or (looking-at dired-subdir-regexp)
 630       (insert "  "
 631               (directory-file-name (file-name-directory default-directory))
 632               ":\n"))
 633   (dired-mode dirname (or switches dired-listing-switches))
 634   (setq mode-name "Virtual Dired"
 635         revert-buffer-function 'dired-virtual-revert)
 636   (set (make-local-variable 'dired-subdir-alist) nil)
 637   (dired-build-subdir-alist)
 638   (goto-char (point-min))
 639   (dired-initial-position dirname))
 640
 641 (defun dired-virtual-guess-dir ()
 642   "Guess and return appropriate working directory of this buffer.
 643 The buffer is assumed to be in Dired or ls -lR format.  The guess is
 644 based upon buffer contents.  If nothing could be guessed, returns
 645 nil."
 646
 647   (let ((regexp "^\\(  \\)?\\([^ \n\r]*\\)\\(:\\)[\n\r]")
 648         (subexpr 2))
 649     (goto-char (point-min))
 650     (cond ((looking-at regexp)
 651            ;; If a saved dired buffer, look to which dir and
 652            ;; perhaps wildcard it belongs:
 653            (let ((dir (buffer-substring (match-beginning subexpr)
 654                                         (match-end subexpr))))
 655              (file-name-as-directory dir)))
 656           ;; Else no match for headerline found.  It's a raw ls listing.
 657           ;; In raw ls listings the directory does not have a headerline
 658           ;; try parent of first subdir, if any
 659           ((re-search-forward regexp nil t)
 660            (file-name-directory
 661             (directory-file-name
 662              (file-name-as-directory
 663               (buffer-substring (match-beginning subexpr)
 664                                 (match-end subexpr))))))
 665           (t                            ; if all else fails
 666            nil))))
 667
 668
 669 (defun dired-virtual-revert (&optional _arg _noconfirm)
 670   (if (not
 671        (y-or-n-p "Cannot revert a Virtual Dired buffer - switch to Real Dired mode? "))
 672       (error "Cannot revert a Virtual Dired buffer")
 673     (setq mode-name "Dired"
 674           revert-buffer-function 'dired-revert)
 675     (revert-buffer)))
 676
 677 ;; A zero-arg version of dired-virtual.
 678 (defun dired-virtual-mode ()
 679   "Put current buffer into Virtual Dired mode (see `dired-virtual').
 680 Useful on `magic-mode-alist' with the regexp
 681
 682   \"^  \\\\(/[^ /]+\\\\)+/?:$\"
 683
 684 to put saved dired buffers automatically into Virtual Dired mode.
 685
 686 Also useful for `auto-mode-alist' like this:
 687
 688   (add-to-list 'auto-mode-alist
 689                '(\"[^/]\\\\.dired\\\\'\" . dired-virtual-mode))"
 690   (interactive)
 691   (dired-virtual (dired-virtual-guess-dir)))
 692
 693 \f
 694 ;;; SMART SHELL.
 695
 696 ;; An Emacs buffer can have but one working directory, stored in the
 697 ;; buffer-local variable `default-directory'.  A Dired buffer may have
 698 ;; several subdirectories inserted, but still has but one working directory:
 699 ;; that of the top level Dired directory in that buffer.  For some commands
 700 ;; it is appropriate that they use the current Dired directory instead of
 701 ;; `default-directory', e.g., `find-file' and `compile'.  This is a general
 702 ;; mechanism is provided for special handling of the working directory in
 703 ;; special major modes.
 704
 705 (define-obsolete-variable-alias 'default-directory-alist
 706   'dired-default-directory-alist "24.1")
 707
 708 ;; It's easier to add to this alist than redefine function
 709 ;; default-directory while keeping the old information.
 710 (defconst dired-default-directory-alist
 711   '((dired-mode . (if (fboundp 'dired-current-directory)
 712                       (dired-current-directory)
 713                     default-directory)))
 714   "Alist of major modes and their opinion on `default-directory'.
 715 Each element has the form (MAJOR . EXPRESSION).
 716 The function `dired-default-directory' evaluates EXPRESSION to
 717 determine a default directory.")
 718
 719 (put 'dired-default-directory-alist 'risky-local-variable t) ; gets eval'd
 720 (make-obsolete-variable 'dired-default-directory-alist
 721                         "this feature is due to be removed." "24.1")
 722
 723 (defun dired-default-directory ()
 724   "Return the `dired-default-directory-alist' entry for the current major-mode.
 725 If none, return `default-directory'."
 726   (or (eval (cdr (assq major-mode dired-default-directory-alist)))
 727       default-directory))
 728
 729 ;; It looks like this was intended to be something of a "general" feature,
 730 ;; but it only ever seems to have been used in dired-smart-shell-command,
 731 ;; and does not seem worth keeping around (?).
 732 (make-obsolete 'dired-default-directory
 733                "this feature is due to be removed." "24.1")
 734
 735 (defun dired-smart-shell-command (command &optional output-buffer error-buffer)
 736   "Like function `shell-command', but in the current Virtual Dired directory."
 737   (interactive
 738    (list
 739     (read-shell-command "Shell command: " nil nil
 740                         (cond
 741                          (buffer-file-name (file-relative-name buffer-file-name))
 742                          ((eq major-mode 'dired-mode) (dired-get-filename t t))))
 743     current-prefix-arg
 744     shell-command-default-error-buffer))
 745   (let ((default-directory (or (and (eq major-mode 'dired-mode)
 746                                     (dired-current-directory))
 747                                default-directory)))
 748     (shell-command command output-buffer error-buffer)))
 749
 750 \f
 751 ;;; LOCAL VARIABLES FOR DIRED BUFFERS.
 752
 753 ;; Brief Description  (This feature is obsolete as of Emacs 24.1)
 754 ;;
 755 ;; * `dired-extra-startup' is part of the `dired-mode-hook'.
 756 ;;
 757 ;; * `dired-extra-startup' calls `dired-hack-local-variables'
 758 ;;
 759 ;; * `dired-hack-local-variables' checks the value of
 760 ;;   `dired-local-variables-file'
 761 ;;
 762 ;; * Check if `dired-local-variables-file' is a non-nil string and is a
 763 ;;   filename found in the directory of the Dired Buffer being created.
 764 ;;
 765 ;; * If `dired-local-variables-file' satisfies the above, then temporarily
 766 ;;   include it in the Dired Buffer at the bottom.
 767 ;;
 768 ;; * Set `enable-local-variables' temporarily to the user variable
 769 ;;   `dired-enable-local-variables' and run `hack-local-variables' on the
 770 ;;   Dired Buffer.
 771
 772 (defcustom dired-local-variables-file (convert-standard-filename ".dired")
 773   "Filename, as string, containing local dired buffer variables to be hacked.
 774 If this file found in current directory, then it will be inserted into dired
 775 buffer and `hack-local-variables' will be run.  See Info node
 776 `(emacs)File Variables' for more information on local variables.
 777 See also `dired-enable-local-variables'."
 778   :type 'file
 779   :group 'dired)
 780
 781 (make-obsolete-variable 'dired-local-variables-file 'dir-locals-file "24.1")
 782
 783 (defun dired-hack-local-variables ()
 784   "Evaluate local variables in `dired-local-variables-file' for dired buffer."
 785   (and (stringp dired-local-variables-file)
 786        (file-exists-p dired-local-variables-file)
 787        (let ((opoint (point-max))
 788              (inhibit-read-only t)
 789              ;; In case user has `enable-local-variables' set to nil we
 790              ;; override it locally with dired's variable.
 791              (enable-local-variables dired-enable-local-variables))
 792          ;; Insert 'em.
 793          (save-excursion
 794            (goto-char opoint)
 795            (insert "\^L\n")
 796            (insert-file-contents dired-local-variables-file))
 797          ;; Hack 'em.
 798          (unwind-protect
 799              (let ((buffer-file-name dired-local-variables-file))
 800                (hack-local-variables))
 801            ;; Delete this stuff: `eobp' is used to find last subdir by dired.el.
 802            (delete-region opoint (point-max)))
 803          ;; Make sure that the modeline shows the proper information.
 804          (dired-sort-set-modeline))))
 805
 806 (make-obsolete 'dired-hack-local-variables
 807                'hack-dir-local-variables-non-file-buffer "24.1")
 808
 809 ;; Does not seem worth a dedicated command.
 810 ;; See the more general features in files-x.el.
 811 (defun dired-omit-here-always ()
 812   "Create `dir-locals-file' setting `dired-omit-mode' to t in `dired-mode'.
 813 If in a Dired buffer, reverts it."
 814   (interactive)
 815   (if (file-exists-p dired-local-variables-file)
 816       (error "Old-style dired-local-variables-file `./%s' found;
 817 replace it with a dir-locals-file `./%s'"
 818              dired-local-variables-file
 819              dir-locals-file))
 820   (if (file-exists-p dir-locals-file)
 821       (message "File `./%s' already exists." dir-locals-file)
 822     (with-temp-buffer
 823       (insert "\
 824 \((dired-mode . ((subdirs . nil)
 825                 (dired-omit-mode . t))))\n")
 826       (write-file dir-locals-file))
 827     ;; Run extra-hooks and revert directory.
 828     (when (derived-mode-p 'dired-mode)
 829       (hack-dir-local-variables-non-file-buffer)
 830       (dired-extra-startup)
 831       (dired-revert))))
 832
 833 (make-obsolete 'dired-omit-here-always 'add-dir-local-variable "24.1")
 834
 835 \f
 836 ;;; GUESS SHELL COMMAND.
 837
 838 ;; Brief Description:
 839 ;;;
 840 ;; * `dired-do-shell-command' is bound to `!' by dired.el.
 841 ;;;
 842 ;; * `dired-guess-shell-command' provides smarter defaults for
 843 ;;;    dired-aux.el's `dired-read-shell-command'.
 844 ;;;
 845 ;; * `dired-guess-shell-command' calls `dired-guess-default' with list of
 846 ;;;    marked files.
 847 ;;;
 848 ;; * Parse `dired-guess-shell-alist-user' and
 849 ;;;   `dired-guess-shell-alist-default' (in that order) for the first REGEXP
 850 ;;;   that matches the first file in the file list.
 851 ;;;
 852 ;; * If the REGEXP matches all the entries of the file list then evaluate
 853 ;;;   COMMAND, which is either a string or a Lisp expression returning a
 854 ;;;   string.  COMMAND may be a list of commands.
 855 ;;;
 856 ;; * Return this command to `dired-guess-shell-command' which prompts user
 857 ;;;   with it.  The list of commands is put into the list of default values.
 858 ;;;   If a command is used successfully then it is stored permanently in
 859 ;;;   `dired-shell-command-history'.
 860
 861 ;; Guess what shell command to apply to a file.
 862 (defvar dired-shell-command-history nil
 863   "History list for commands that read dired-shell commands.")
 864
 865 ;; Default list of shell commands.
 866
 867 ;; NOTE: Use `gunzip -c' instead of `zcat' on `.gz' files.  Some do not
 868 ;; install GNU zip's version of zcat.
 869
 870 (autoload 'Man-support-local-filenames "man")
 871
 872 (defvar dired-guess-shell-alist-default
 873   (list
 874    (list "\\.tar\\'"
 875          '(if dired-guess-shell-gnutar
 876               (concat dired-guess-shell-gnutar " xvf")
 877             "tar xvf")
 878          ;; Extract files into a separate subdirectory
 879          '(if dired-guess-shell-gnutar
 880               (concat "mkdir " (file-name-sans-extension file)
 881                       "; " dired-guess-shell-gnutar " -C "
 882                       (file-name-sans-extension file) " -xvf")
 883             (concat "mkdir " (file-name-sans-extension file)
 884                     "; tar -C " (file-name-sans-extension file) " -xvf"))
 885          ;; List archive contents.
 886          '(if dired-guess-shell-gnutar
 887               (concat dired-guess-shell-gnutar " tvf")
 888             "tar tvf"))
 889
 890    ;; REGEXPS for compressed archives must come before the .Z rule to
 891    ;; be recognized:
 892    (list "\\.tar\\.Z\\'"
 893          ;; Untar it.
 894          '(if dired-guess-shell-gnutar
 895               (concat dired-guess-shell-gnutar " zxvf")
 896             (concat "zcat * | tar xvf -"))
 897          ;; Optional conversion to gzip format.
 898          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 899                   " " dired-guess-shell-znew-switches))
 900
 901    ;; gzip'ed archives
 902    (list "\\.t\\(ar\\.\\)?gz\\'"
 903          '(if dired-guess-shell-gnutar
 904               (concat dired-guess-shell-gnutar " zxvf")
 905             (concat "gunzip -qc * | tar xvf -"))
 906          ;; Extract files into a separate subdirectory
 907          '(if dired-guess-shell-gnutar
 908               (concat "mkdir " (file-name-sans-extension file)
 909                       "; " dired-guess-shell-gnutar " -C "
 910                       (file-name-sans-extension file) " -zxvf")
 911             (concat "mkdir " (file-name-sans-extension file)
 912                     "; gunzip -qc * | tar -C "
 913                     (file-name-sans-extension file) " -xvf -"))
 914          ;; Optional decompression.
 915          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q" ""))
 916          ;; List archive contents.
 917          '(if dired-guess-shell-gnutar
 918               (concat dired-guess-shell-gnutar " ztvf")
 919             (concat "gunzip -qc * | tar tvf -")))
 920
 921    ;; bzip2'ed archives
 922    (list "\\.t\\(ar\\.bz2\\|bz\\)\\'"
 923          "bunzip2 -c * | tar xvf -"
 924          ;; Extract files into a separate subdirectory
 925          '(concat "mkdir " (file-name-sans-extension file)
 926                   "; bunzip2 -c * | tar -C "
 927                   (file-name-sans-extension file) " -xvf -")
 928          ;; Optional decompression.
 929          "bunzip2")
 930
 931    ;; xz'ed archives
 932    (list "\\.t\\(ar\\.\\)?xz\\'"
 933          "unxz -c * | tar xvf -"
 934          ;; Extract files into a separate subdirectory
 935          '(concat "mkdir " (file-name-sans-extension file)
 936                   "; unxz -c * | tar -C "
 937                   (file-name-sans-extension file) " -xvf -")
 938          ;; Optional decompression.
 939          "unxz")
 940
 941    '("\\.shar\\.Z\\'" "zcat * | unshar")
 942    '("\\.shar\\.g?z\\'" "gunzip -qc * | unshar")
 943
 944    '("\\.e?ps\\'" "ghostview" "xloadimage" "lpr")
 945    (list "\\.e?ps\\.g?z\\'" "gunzip -qc * | ghostview -"
 946          ;; Optional decompression.
 947          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
 948    (list "\\.e?ps\\.Z\\'" "zcat * | ghostview -"
 949          ;; Optional conversion to gzip format.
 950          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 951                   " " dired-guess-shell-znew-switches))
 952
 953    '("\\.patch\\'" "cat * | patch")
 954    (list "\\.patch\\.g?z\\'" "gunzip -qc * | patch"
 955          ;; Optional decompression.
 956          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
 957    (list "\\.patch\\.Z\\'" "zcat * | patch"
 958          ;; Optional conversion to gzip format.
 959          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 960                   " " dired-guess-shell-znew-switches))
 961
 962    ;; The following four extensions are useful with dired-man ("N" key)
 963    ;; FIXME "man ./" does not work with dired-do-shell-command,
 964    ;; because there seems to be no way for us to modify the filename,
 965    ;; only the command.  Hmph.  `dired-man' works though.
 966    (list "\\.\\(?:[0-9]\\|man\\)\\'" '(let ((loc (Man-support-local-filenames)))
 967                                         (cond ((eq loc 'man-db) "man -l")
 968                                               ((eq loc 'man) "man ./")
 969                                               (t
 970                                                "cat * | tbl | nroff -man -h"))))
 971    (list "\\.\\(?:[0-9]\\|man\\)\\.g?z\\'"
 972          '(let ((loc (Man-support-local-filenames)))
 973             (cond ((eq loc 'man-db)
 974                    "man -l")
 975                   ((eq loc 'man)
 976                    "man ./")
 977                   (t "gunzip -qc * | tbl | nroff -man -h")))
 978          ;; Optional decompression.
 979          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
 980    (list "\\.[0-9]\\.Z\\'" '(let ((loc (Man-support-local-filenames)))
 981                               (cond ((eq loc 'man-db) "man -l")
 982                                     ((eq loc 'man) "man ./")
 983                                     (t "zcat * | tbl | nroff -man -h")))
 984          ;; Optional conversion to gzip format.
 985          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 986                   " " dired-guess-shell-znew-switches))
 987    '("\\.pod\\'" "perldoc" "pod2man * | nroff -man")
 988
 989    '("\\.dvi\\'" "xdvi" "dvips")                ; preview and printing
 990    '("\\.au\\'" "play")                 ; play Sun audiofiles
 991    '("\\.mpe?g\\'\\|\\.avi\\'" "xine -p")
 992    '("\\.ogg\\'" "ogg123")
 993    '("\\.mp3\\'" "mpg123")
 994    '("\\.wav\\'" "play")
 995    '("\\.uu\\'" "uudecode")             ; for uudecoded files
 996    '("\\.hqx\\'" "mcvert")
 997    '("\\.sh\\'" "sh")                   ; execute shell scripts
 998    '("\\.xbm\\'" "bitmap")              ; view X11 bitmaps
 999    '("\\.gp\\'" "gnuplot")
1000    '("\\.p[bgpn]m\\'" "xloadimage")
1001    '("\\.gif\\'" "xloadimage")          ; view gif pictures
1002    '("\\.tif\\'" "xloadimage")
1003    '("\\.png\\'" "display")             ; xloadimage 4.1 doesn't grok PNG
1004    '("\\.jpe?g\\'" "xloadimage")
1005    '("\\.fig\\'" "xfig")                        ; edit fig pictures
1006    '("\\.out\\'" "xgraph")              ; for plotting purposes.
1007    '("\\.tex\\'" "latex" "tex")
1008    '("\\.texi\\(nfo\\)?\\'" "makeinfo" "texi2dvi")
1009    '("\\.pdf\\'" "xpdf")
1010    '("\\.doc\\'" "antiword" "strings")
1011    '("\\.rpm\\'" "rpm -qilp" "rpm -ivh")
1012    '("\\.dia\\'" "dia")
1013    '("\\.mgp\\'" "mgp")
1014
1015    ;; Some other popular archivers.
1016    (list "\\.zip\\'" "unzip" "unzip -l"
1017          ;; Extract files into a separate subdirectory
1018          '(concat "unzip" (if dired-guess-shell-gzip-quiet " -q")
1019                   " -d " (file-name-sans-extension file)))
1020    '("\\.zoo\\'" "zoo x//")
1021    '("\\.lzh\\'" "lharc x")
1022    '("\\.arc\\'" "arc x")
1023    '("\\.shar\\'" "unshar")
1024    '("\\.rar\\'" "unrar x")
1025    '("\\.7z\\'" "7z x")
1026
1027    ;; Compression.
1028    (list "\\.g?z\\'" '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1029    (list "\\.dz\\'" "dictunzip")
1030    (list "\\.bz2\\'" "bunzip2")
1031    (list "\\.xz\\'" "unxz")
1032    (list "\\.Z\\'" "uncompress"
1033          ;; Optional conversion to gzip format.
1034          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1035                   " " dired-guess-shell-znew-switches))
1036
1037    '("\\.sign?\\'" "gpg --verify"))
1038
1039   "Default alist used for shell command guessing.
1040 See `dired-guess-shell-alist-user'.")
1041
1042 (defcustom dired-guess-shell-alist-user nil
1043   "User-defined alist of rules for suggested commands.
1044 These rules take precedence over the predefined rules in the variable
1045 `dired-guess-shell-alist-default' (to which they are prepended).
1046
1047 Each element of this list looks like
1048
1049     \(REGEXP COMMAND...\)
1050
1051 where each COMMAND can either be a string or a Lisp expression that evaluates
1052 to a string.  If several COMMANDs are given, the first one will be the default
1053 and the rest will be added temporarily to the history and can be retrieved
1054 with \\[previous-history-element] (M-p) .
1055
1056 The variable `dired-guess-shell-case-fold-search' controls whether
1057 REGEXP is matched case-sensitively.
1058
1059 You can set this variable in your ~/.emacs.  For example, to add rules for
1060 `.foo' and `.bar' files, write
1061
1062  \(setq dired-guess-shell-alist-user
1063         '((\"\\\\.foo\\\\'\" \"FOO-COMMAND\")
1064           (\"\\\\.bar\\\\'\"
1065            (if condition
1066               \"BAR-COMMAND-1\"
1067             \"BAR-COMMAND-2\"))))"
1068   :group 'dired-x
1069   :type '(alist :key-type regexp :value-type (repeat sexp)))
1070
1071 (defcustom dired-guess-shell-case-fold-search t
1072   "If non-nil, `dired-guess-shell-alist-default' and
1073 `dired-guess-shell-alist-user' are matched case-insensitively."
1074   :group 'dired-x
1075   :type 'boolean)
1076
1077 (defun dired-guess-default (files)
1078   "Return a shell command, or a list of commands, appropriate for FILES.
1079 See `dired-guess-shell-alist-user'."
1080
1081   (let* ((case-fold-search dired-guess-shell-case-fold-search)
1082          ;; Prepend the user's alist to the default alist.
1083          (alist (append dired-guess-shell-alist-user
1084                         dired-guess-shell-alist-default))
1085          (file (car files))
1086          (flist (cdr files))
1087          elt regexp cmds)
1088
1089     ;; Find the first match in the alist for first file in FILES.
1090     (while alist
1091       (setq elt (car alist)
1092             regexp (car elt)
1093             alist (cdr alist))
1094       (if (string-match regexp file)
1095           (setq cmds (cdr elt)
1096                 alist nil)))
1097
1098     ;; If more than one file, see if all of FILES match regular expression.
1099     (while (and flist
1100                 (string-match regexp (car flist)))
1101       (setq flist (cdr flist)))
1102
1103     ;; If flist is still non-nil, then do not guess since this means that not
1104     ;; all the files in FILES were matched by the regexp.
1105     (setq cmds (and (not flist) cmds))
1106
1107     ;; Return commands or nil if flist is still non-nil.
1108     ;; Evaluate the commands in order that any logical testing will be done.
1109     (if (cdr cmds)
1110         (delete-dups (mapcar #'eval cmds))
1111       (eval (car cmds)))))              ; single command
1112
1113 (defun dired-guess-shell-command (prompt files)
1114   "Ask user with PROMPT for a shell command, guessing a default from FILES."
1115   (let ((default (dired-guess-default files))
1116         default-list val)
1117     (if (null default)
1118         ;; Nothing to guess
1119         (read-shell-command prompt nil 'dired-shell-command-history)
1120       (if (listp default)
1121           ;; More than one guess
1122           (setq default-list default
1123                 default (car default)
1124                 prompt (concat
1125                         prompt
1126                         (format "{%d guesses} " (length default-list))))
1127         ;; Just one guess
1128         (setq default-list (list default)))
1129       ;; Put the first guess in the prompt but not in the initial value.
1130       (setq prompt (concat prompt (format "[%s] " default)))
1131       ;; All guesses can be retrieved with M-n
1132       (setq val (read-shell-command prompt nil
1133                                     'dired-shell-command-history
1134                                     default-list))
1135       ;; If we got a return, then return default.
1136       (if (equal val "") default val))))
1137
1138 \f
1139 ;;; RELATIVE SYMBOLIC LINKS.
1140
1141 (declare-function make-symbolic-link "fileio.c")
1142
1143 (defvar dired-keep-marker-relsymlink ?S
1144   "See variable `dired-keep-marker-move'.")
1145
1146 (defun dired-make-relative-symlink (file1 file2 &optional ok-if-already-exists)
1147   "Make a symbolic link (pointing to FILE1) in FILE2.
1148 The link is relative (if possible), for example
1149
1150     \"/vol/tex/bin/foo\" \"/vol/local/bin/foo\"
1151
1152 results in
1153
1154     \"../../tex/bin/foo\" \"/vol/local/bin/foo\""
1155   (interactive "FRelSymLink: \nFRelSymLink %s: \np")
1156   (let (name1 name2 len1 len2 (index 0) sub)
1157     (setq file1 (expand-file-name file1)
1158           file2 (expand-file-name file2)
1159           len1 (length file1)
1160           len2 (length file2))
1161     ;; Find common initial file name components:
1162     (let (next)
1163       (while (and (setq next (string-match "/" file1 index))
1164                   (< (setq next (1+ next)) (min len1 len2))
1165                   ;; For the comparison, both substrings must end in
1166                   ;; `/', so NEXT is *one plus* the result of the
1167                   ;; string-match.
1168                   ;; E.g., consider the case of linking "/tmp/a/abc"
1169                   ;; to "/tmp/abc" erroneously giving "/tmp/a" instead
1170                   ;; of "/tmp/" as common initial component
1171                   (string-equal (substring file1 0 next)
1172                                 (substring file2 0 next)))
1173         (setq index next))
1174       (setq name2 file2
1175             sub (substring file1 0 index)
1176             name1 (substring file1 index)))
1177     (if (string-equal sub "/")
1178         ;; No common initial file name found
1179         (setq name1 file1)
1180       ;; Else they have a common parent directory
1181       (let ((tem (substring file2 index))
1182             (start 0)
1183             (count 0))
1184         ;; Count number of slashes we must compensate for ...
1185         (while (setq start (string-match "/" tem start))
1186           (setq count (1+ count)
1187                 start (1+ start)))
1188         ;; ... and prepend a "../" for each slash found:
1189         (dotimes (_n count)
1190           (setq name1 (concat "../" name1)))))
1191     (make-symbolic-link
1192      (directory-file-name name1)        ; must not link to foo/
1193                                         ; (trailing slash!)
1194      name2 ok-if-already-exists)))
1195
1196 (autoload 'dired-do-create-files "dired-aux")
1197
1198 ;;;###autoload
1199 (defun dired-do-relsymlink (&optional arg)
1200    "Relative symlink all marked (or next ARG) files into a directory.
1201 Otherwise make a relative symbolic link to the current file.
1202 This creates relative symbolic links like
1203
1204     foo -> ../bar/foo
1205
1206 not absolute ones like
1207
1208     foo -> /ugly/file/name/that/may/change/any/day/bar/foo
1209
1210 For absolute symlinks, use \\[dired-do-symlink]."
1211   (interactive "P")
1212   (dired-do-create-files 'relsymlink #'dired-make-relative-symlink
1213                            "RelSymLink" arg dired-keep-marker-relsymlink))
1214
1215 (autoload 'dired-mark-read-regexp "dired-aux")
1216 (autoload 'dired-do-create-files-regexp "dired-aux")
1217
1218 (defun dired-do-relsymlink-regexp (regexp newname &optional arg whole-name)
1219   "RelSymlink all marked files containing REGEXP to NEWNAME.
1220 See functions `dired-do-rename-regexp' and `dired-do-relsymlink'
1221 for more info."
1222   (interactive (dired-mark-read-regexp "RelSymLink"))
1223   (dired-do-create-files-regexp
1224    #'dired-make-relative-symlink
1225    "RelSymLink" arg regexp newname whole-name dired-keep-marker-relsymlink))
1226
1227 \f
1228 ;;; VISIT ALL MARKED FILES SIMULTANEOUSLY.
1229
1230 ;; Brief Description:
1231 ;;;
1232 ;; `dired-do-find-marked-files' is bound to `F' by dired-x.el.
1233 ;;;
1234 ;; * Use `dired-get-marked-files' to collect the marked files in the current
1235 ;;;   Dired Buffer into a list of filenames `FILE-LIST'.
1236 ;;;
1237 ;; * Pass FILE-LIST to `dired-simultaneous-find-file' all with
1238 ;;;   `dired-do-find-marked-files''s prefix argument NOSELECT.
1239 ;;;
1240 ;; * `dired-simultaneous-find-file' runs through FILE-LIST decrementing the
1241 ;;;   list each time.
1242 ;;;
1243 ;; * If NOSELECT is non-nil then just run `find-file-noselect' on each
1244 ;;;   element of FILE-LIST.
1245 ;;;
1246 ;; * If NOSELECT is nil then calculate the `size' of the window for each file
1247 ;;;   by dividing the `window-height' by length of FILE-LIST.  Thus, `size' is
1248 ;;;   cognizant of the window-configuration.
1249 ;;;
1250 ;; * If `size' is too small abort, otherwise run `find-file' on each element
1251 ;;;   of FILE-LIST giving each a window of height `size'.
1252
1253 (defun dired-do-find-marked-files (&optional noselect)
1254   "Find all marked files displaying all of them simultaneously.
1255 With optional NOSELECT just find files but do not select them.
1256
1257 The current window is split across all files marked, as evenly as possible.
1258 Remaining lines go to bottom-most window.  The number of files that can be
1259 displayed this way is restricted by the height of the current window and
1260 `window-min-height'.
1261
1262 To keep dired buffer displayed, type \\[split-window-below] first.
1263 To display just marked files, type \\[delete-other-windows] first."
1264   (interactive "P")
1265   (dired-simultaneous-find-file (dired-get-marked-files) noselect))
1266
1267 (defun dired-simultaneous-find-file (file-list noselect)
1268   "Visit all files in FILE-LIST and display them simultaneously.
1269 The current window is split across all files in FILE-LIST, as evenly as
1270 possible.  Remaining lines go to the bottom-most window.  The number of
1271 files that can be displayed this way is restricted by the height of the
1272 current window and the variable `window-min-height'.  With non-nil
1273 NOSELECT the files are merely found but not selected."
1274   ;; We don't make this function interactive because it is usually too clumsy
1275   ;; to specify FILE-LIST interactively unless via dired.
1276   (let (size)
1277     (if noselect
1278         ;; Do not select the buffer.
1279         (find-file-noselect (car file-list))
1280       ;; We will have to select the buffer.  Calculate and check window size.
1281       (setq size (/ (window-height) (length file-list)))
1282       (or (<= window-min-height size)
1283           (error "Too many files to visit simultaneously.  Try C-u prefix"))
1284       (find-file (car file-list)))
1285     ;; Decrement.
1286     (dolist (file (cdr file-list))
1287       (if noselect
1288           ;; Do not select the buffer.
1289           (find-file-noselect file)
1290         ;; Vertically split off a window of desired size.  Upper window will
1291         ;; have SIZE lines.  Select lower (larger) window.  We split it again.
1292         (select-window (split-window nil size))
1293         (find-file file)))))
1294
1295 \f
1296 ;;; MISCELLANEOUS COMMANDS.
1297
1298 ;; Run man on files.
1299
1300 (declare-function Man-getpage-in-background "man" (topic))
1301
1302 (defvar manual-program) ; from man.el
1303
1304 (defun dired-man ()
1305   "Run `man' on this file."
1306 ;; Used also to say: "Display old buffer if buffer name matches filename."
1307 ;; but I have no idea what that means.
1308   (interactive)
1309   (require 'man)
1310   (let* ((file (dired-get-filename))
1311          (manual-program (replace-regexp-in-string "\\*" "%s"
1312                           (dired-guess-shell-command
1313                            "Man command: " (list file)))))
1314     (Man-getpage-in-background file)))
1315
1316 ;; Run Info on files.
1317
1318 (defun dired-info ()
1319   "Run `info' on this file."
1320   (interactive)
1321   (info (dired-get-filename)))
1322
1323 ;; Run mail on mail folders.
1324
1325 (declare-function vm-visit-folder "ext:vm" (folder &optional read-only))
1326 (defvar vm-folder-directory)
1327
1328 (defun dired-vm (&optional read-only)
1329   "Run VM on this file.
1330 With optional prefix argument, visits the folder read-only.
1331 Otherwise obeys the value of `dired-vm-read-only-folders'."
1332   (interactive "P")
1333   (let ((dir (dired-current-directory))
1334         (fil (dired-get-filename)))
1335     (vm-visit-folder fil (or read-only
1336                              (eq t dired-vm-read-only-folders)
1337                              (and dired-vm-read-only-folders
1338                                   (not (file-writable-p fil)))))
1339     ;; So that pressing `v' inside VM does prompt within current directory:
1340     (set (make-local-variable 'vm-folder-directory) dir)))
1341
1342 (defun dired-rmail ()
1343   "Run RMAIL on this file."
1344   (interactive)
1345   (rmail (dired-get-filename)))
1346
1347 (defun dired-do-run-mail ()
1348   "If `dired-bind-vm' is non-nil, call `dired-vm', else call `dired-rmail'."
1349   (interactive)
1350   (if dired-bind-vm
1351       ;; Read mail folder using vm.
1352       (dired-vm)
1353     ;; Read mail folder using rmail.
1354     (dired-rmail)))
1355
1356 \f
1357 ;;; MISCELLANEOUS INTERNAL FUNCTIONS.
1358
1359 ;; This should be a builtin
1360 (defun dired-buffer-more-recently-used-p (buffer1 buffer2)
1361   "Return t if BUFFER1 is more recently used than BUFFER2.
1362 Considers buffers closer to the car of `buffer-list' to be more recent."
1363   (and (not (equal buffer1 buffer2))
1364        (memq buffer1 (buffer-list))
1365        (not (memq buffer1 (memq buffer2 (buffer-list))))))
1366
1367 ;; Same thing as `dired-buffers-for-dir' of dired.el? - lrd 11/23/93
1368 ;; (defun dired-buffers-for-dir-exact (dir)
1369 ;; ;; Return a list of buffers that dired DIR (a directory or wildcard)
1370 ;; ;; at top level, or as subdirectory.
1371 ;; ;; Top level matches must match the wildcard part too, if any.
1372 ;; ;; The list is in reverse order of buffer creation, most recent last.
1373 ;; ;; As a side effect, killed dired buffers for DIR are removed from
1374 ;; ;; dired-buffers.
1375 ;;   (let ((alist dired-buffers) result elt)
1376 ;;     (while alist
1377 ;;       (setq elt (car alist)
1378 ;;             alist (cdr alist))
1379 ;;       (let ((buf (cdr elt)))
1380 ;;         (if (buffer-name buf)
1381 ;;             ;; Top level must match exactly against dired-directory in
1382 ;;             ;; case one of them is a wildcard.
1383 ;;             (if (or (equal dir (with-current-buffer buf dired-directory))
1384 ;;                     (assoc dir (with-current-buffer buf dired-subdir-alist)))
1385 ;;                 (setq result (cons buf result)))
1386 ;;           ;; else buffer is killed - clean up:
1387 ;;           (setq dired-buffers (delq elt dired-buffers)))))
1388 ;;     result))
1389
1390 \f
1391 ;; Does anyone use this? - lrd 6/29/93.
1392 ;; Apparently people do use it. - lrd 12/22/97.
1393
1394 (with-no-warnings
1395   ;; Warnings are suppressed to avoid "global/dynamic var `X' lacks a prefix".
1396   ;; This is unbearably ugly, but not more than having global variables
1397   ;; named size, time, name or s, however practical it can be while writing
1398   ;; `dired-mark-sexp' predicates.
1399   (defvar inode)
1400   (defvar s)
1401   (defvar mode)
1402   (defvar nlink)
1403   (defvar uid)
1404   (defvar gid)
1405   (defvar size)
1406   (defvar time)
1407   (defvar name)
1408   (defvar sym))
1409
1410 (defun dired-mark-sexp (predicate &optional unflag-p)
1411   "Mark files for which PREDICATE returns non-nil.
1412 With a prefix arg, unmark or unflag those files instead.
1413
1414 PREDICATE is a lisp expression that can refer to the following symbols:
1415
1416     inode  [integer] the inode of the file (only for ls -i output)
1417     s      [integer] the size of the file for ls -s output
1418                      (usually in blocks or, with -k, in KByte)
1419     mode   [string]  file permission bits, e.g. \"-rw-r--r--\"
1420     nlink  [integer] number of links to file
1421     uid    [string]  owner
1422     gid    [string]  group  (If the gid is not displayed by ls,
1423                      this will still be set (to the same as uid))
1424     size   [integer] file size in bytes
1425     time   [string]  the time that ls displays, e.g. \"Feb 12 14:17\"
1426     name   [string]  the name of the file
1427     sym    [string]  if file is a symbolic link, the linked-to name, else \"\"
1428
1429 For example, use
1430
1431         (equal 0 size)
1432
1433 to mark all zero length files."
1434   ;; Using sym="" instead of nil avoids the trap of
1435   ;; (string-match "foo" sym) into which a user would soon fall.
1436   ;; Give `equal' instead of `=' in the example, as this works on
1437   ;; integers and strings.
1438   (interactive "xMark if (lisp expr): \nP")
1439   (message "%s" predicate)
1440   (let ((dired-marker-char (if unflag-p ?\040 dired-marker-char))
1441         inode s mode nlink uid gid size time name sym)
1442     (dired-mark-if
1443      (save-excursion
1444        (and
1445         ;; Sets vars
1446         ;;                inode s mode nlink uid gid size time name sym
1447
1448         ;; according to current file line.  Returns t for success, nil if
1449         ;; there is no file line.  Upon success, all variables are set, either
1450         ;; to nil or the appropriate value, so they need not be initialized.
1451         ;; Moves point within the current line.
1452         (dired-move-to-filename)
1453         (let (pos
1454               (mode-len 10) ; length of mode string
1455               ;; like in dired.el, but with subexpressions \1=inode, \2=s:
1456               (dired-re-inode-size "\\s *\\([0-9]*\\)\\s *\\([0-9]*\\) ?"))
1457           (beginning-of-line)
1458           (forward-char 2)
1459           (if (looking-at dired-re-inode-size)
1460               (progn
1461                 (goto-char (match-end 0))
1462                 (setq inode (string-to-number
1463                              (buffer-substring (match-beginning 1)
1464                                                (match-end 1)))
1465                       s (string-to-number
1466                          (buffer-substring (match-beginning 2)
1467                                            (match-end 2)))))
1468             (setq inode nil
1469                   s nil))
1470           (setq mode (buffer-substring (point) (+ mode-len (point))))
1471           (forward-char mode-len)
1472           (setq nlink (read (current-buffer)))
1473           ;; Karsten Wenger <kw@cis.uni-muenchen.de> fixed uid.
1474           (setq uid (buffer-substring (1+ (point))
1475                                       (progn (forward-word 1) (point))))
1476           (re-search-forward directory-listing-before-filename-regexp)
1477           (goto-char (match-beginning 1))
1478           (forward-char -1)
1479           (setq size (string-to-number
1480                       (buffer-substring (save-excursion
1481                                           (backward-word 1)
1482                                           (setq pos (point)))
1483                                         (point))))
1484           (goto-char pos)
1485           (backward-word 1)
1486           ;; if no gid is displayed, gid will be set to uid
1487           ;; but user will then not reference it anyway in PREDICATE.
1488           (setq gid (buffer-substring (save-excursion
1489                                         (forward-word 1) (point))
1490                                       (point))
1491                 time (buffer-substring (match-beginning 1)
1492                                        (1- (dired-move-to-filename)))
1493                 name (buffer-substring (point)
1494                                        (or
1495                                         (dired-move-to-end-of-filename t)
1496                                         (point)))
1497                 sym (if (looking-at " -> ")
1498                         (buffer-substring (progn (forward-char 4) (point))
1499                                           (line-end-position))
1500                       ""))
1501           t)
1502         (eval predicate)))
1503      (format "'%s file" predicate))))
1504
1505 \f
1506 ;;; FIND FILE AT POINT.
1507
1508 (defcustom dired-x-hands-off-my-keys t
1509   "Non-nil means don't remap `find-file' to `dired-x-find-file'.
1510 Similarly for `find-file-other-window' and `dired-x-find-file-other-window'.
1511 If you change this variable without using \\[customize] after `dired-x.el'
1512 is loaded then call \\[dired-x-bind-find-file]."
1513   :type 'boolean
1514   :initialize 'custom-initialize-default
1515   :set (lambda (symbol value)
1516          (set symbol value)
1517          (dired-x-bind-find-file))
1518   :group 'dired-x)
1519
1520 (defun dired-x-bind-find-file ()
1521   "Bind `dired-x-find-file' in place of `find-file' (or vice-versa).
1522 Similarly for `dired-x-find-file-other-window' and `find-file-other-window'.
1523 Binding direction based on `dired-x-hands-off-my-keys'."
1524   (interactive)
1525   (if (called-interactively-p 'interactive)
1526       (setq dired-x-hands-off-my-keys
1527             (not (y-or-n-p "Bind dired-x-find-file over find-file? "))))
1528   (define-key (current-global-map) [remap find-file]
1529     (if (not dired-x-hands-off-my-keys) 'dired-x-find-file))
1530   (define-key (current-global-map) [remap find-file-other-window]
1531     (if (not dired-x-hands-off-my-keys) 'dired-x-find-file-other-window)))
1532
1533 ;; Now call it so binding is correct.  This could go in the :initialize
1534 ;; slot, but then dired-x-bind-find-file has to be defined before the
1535 ;; defcustom, and we get free variable warnings.
1536 (dired-x-bind-find-file)
1537
1538 (defun dired-x-find-file (filename)
1539   "Edit file FILENAME.
1540 Like `find-file', except that when called interactively with a
1541 prefix argument, it offers the filename near point as a default."
1542   (interactive (list (dired-x-read-filename-at-point "Find file: ")))
1543   (find-file filename))
1544
1545 (defun dired-x-find-file-other-window (filename)
1546   "Edit file FILENAME, in another window.
1547 Like `find-file-other-window', except that when called interactively with
1548 a prefix argument, when it offers the filename near point as a default."
1549   (interactive (list (dired-x-read-filename-at-point "Find file: ")))
1550   (find-file-other-window filename))
1551
1552 ;;; Internal functions.
1553
1554 ;; Fixme: This should probably use `thing-at-point'.  -- fx
1555 (defun dired-filename-at-point ()
1556   "Return the filename closest to point, expanded.
1557 Point should be in or after a filename."
1558   (save-excursion
1559     ;; First see if just past a filename.
1560     (or (eobp)                             ; why?
1561         (when (looking-at "[] \t\n[{}()]") ; whitespace or some parens
1562           (skip-chars-backward " \n\t\r({[]})")
1563           (or (bobp) (backward-char 1))))
1564     (let ((filename-chars "-.[:alnum:]_/:$+@")
1565           start prefix)
1566       (if (looking-at (format "[%s]" filename-chars))
1567           (progn
1568             (skip-chars-backward filename-chars)
1569             (setq start (point)
1570                   prefix
1571                   ;; This is something to do with ange-ftp filenames.
1572                   ;; It convert foo@bar to /foo@bar.
1573                   ;; But when does the former occur in dired buffers?
1574                   (and (string-match
1575                         "^\\w+@"
1576                         (buffer-substring start (line-end-position)))
1577                        "/"))
1578             (if (string-match "[/~]" (char-to-string (preceding-char)))
1579                 (setq start (1- start)))
1580             (skip-chars-forward filename-chars))
1581         (error "No file found around point!"))
1582       ;; Return string.
1583       (expand-file-name (concat prefix (buffer-substring start (point)))))))
1584
1585 (defun dired-x-read-filename-at-point (prompt)
1586   "Return filename prompting with PROMPT with completion.
1587 If `current-prefix-arg' is non-nil, uses name at point as guess."
1588   (if current-prefix-arg
1589       (let ((guess (dired-filename-at-point)))
1590         (read-file-name prompt
1591                         (file-name-directory guess)
1592                         guess
1593                         nil (file-name-nondirectory guess)))
1594     (read-file-name prompt default-directory)))
1595
1596 (define-obsolete-function-alias 'read-filename-at-point
1597   'dired-x-read-filename-at-point "24.1") ; is this even needed?
1598 \f
1599 ;;; BUG REPORTS
1600
1601 (define-obsolete-function-alias 'dired-x-submit-report 'report-emacs-bug "24.1")
1602
1603 \f
1604 ;; As Barry Warsaw would say: "This might be useful..."
1605 (provide 'dired-x)
1606
1607 ;; Local Variables:
1608 ;; byte-compile-dynamic: t
1609 ;; generated-autoload-file: "dired.el"
1610 ;; End:
1611
1612 ;;; dired-x.el ends here