lisp/dired-x.el

   1 ;;; dired-x.el --- extra Dired functionality
   2
   3 ;; Copyright (C) 1993-1994, 1997, 2001-2013 Free Software Foundation,
   4 ;; Inc.
   5
   6 ;; Author: Sebastian Kremer <sk@thp.uni-koeln.de>
   7 ;;      Lawrence R. Dodd <dodd@roebling.poly.edu>
   8 ;; Maintainer: Romain Francoise <rfrancoise@gnu.org>
   9 ;; Keywords: dired extensions files
  10 ;; Package: emacs
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software: you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation, either version 3 of the License, or
  17 ;; (at your option) any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 ;;; Commentary:
  28
  29 ;; This is based on Sebastian Kremer's excellent dired-x.el (Dired Extra),
  30 ;; version 1.191, adapted for GNU Emacs.  See the `dired-x' info pages.
  31
  32 ;; USAGE: In your ~/.emacs,
  33 ;;
  34 ;; (add-hook 'dired-load-hook
  35 ;;           (lambda ()
  36 ;;                       (load "dired-x")
  37 ;;                       ;; Set global variables here.  For example:
  38 ;;                       ;; (setq dired-guess-shell-gnutar "gtar")
  39 ;;                       ))
  40 ;; (add-hook 'dired-mode-hook
  41 ;;           (lambda ()
  42 ;;                       ;; Set buffer-local variables here.  For example:
  43 ;;                       ;; (dired-omit-mode 1)
  44 ;;                       ))
  45 ;;
  46 ;; At load time dired-x.el will install itself and bind some dired keys.
  47 ;; Some dired.el and dired-aux.el functions have extra features if
  48 ;; dired-x is loaded.
  49
  50 ;; User customization: M-x customize-group RET dired-x RET.
  51
  52 ;; *Please* see the `dired-x' info pages for more details.
  53
  54 \f
  55 ;;; Code:
  56
  57 ;; This is a no-op if dired-x is being loaded via `dired-load-hook',
  58 ;; but maybe not if a dired-x function is being autoloaded.
  59 (require 'dired)
  60
  61 ;;; User-defined variables.
  62
  63 (defgroup dired-x nil
  64   "Extended directory editing (dired-x)."
  65   :group 'dired)
  66
  67 (defgroup dired-keys nil
  68   "Dired keys customizations."
  69   :prefix "dired-"
  70   :group 'dired-x)
  71
  72 (defcustom dired-bind-vm nil
  73   "Non-nil means \"V\" runs `dired-vm', otherwise \"V\" runs `dired-rmail'.
  74 RMAIL files in the old Babyl format (used before before Emacs 23.1)
  75 contain \"-*- rmail -*-\" at the top, so `dired-find-file'
  76 will run `rmail' on these files.  New RMAIL files use the standard
  77 mbox format, and so cannot be distinguished in this way."
  78   :type 'boolean
  79   :group 'dired-keys)
  80
  81 (defcustom dired-bind-jump t
  82   "Non-nil means bind `dired-jump' to C-x C-j, otherwise do not.
  83 Setting this variable directly after dired-x is loaded has no effect -
  84 use \\[customize]."
  85   :type 'boolean
  86   :set (lambda (sym val)
  87          (if (set sym val)
  88              (progn
  89                (define-key ctl-x-map "\C-j" 'dired-jump)
  90                (define-key ctl-x-4-map "\C-j" 'dired-jump-other-window))
  91            (if (eq 'dired-jump (lookup-key ctl-x-map "\C-j"))
  92                (define-key ctl-x-map "\C-j" nil))
  93            (if (eq 'dired-jump-other-window (lookup-key ctl-x-4-map "\C-j"))
  94                (define-key ctl-x-4-map "\C-j" nil))))
  95   :group 'dired-keys)
  96
  97 (defcustom dired-bind-man t
  98   "Non-nil means bind `dired-man' to \"N\" in dired-mode, otherwise do not.
  99 Setting this variable directly after dired-x is loaded has no effect -
 100 use \\[customize]."
 101   :type 'boolean
 102   :set (lambda (sym val)
 103          (if (set sym val)
 104              (define-key dired-mode-map "N" 'dired-man)
 105            (if (eq 'dired-man (lookup-key dired-mode-map "N"))
 106                (define-key dired-mode-map "N" nil))))
 107   :group 'dired-keys)
 108
 109 (defcustom dired-bind-info t
 110   "Non-nil means bind `dired-info' to \"I\" in dired-mode, otherwise do not.
 111 Setting this variable directly after dired-x is loaded has no effect -
 112 use \\[customize]."
 113   :type 'boolean
 114   :set (lambda (sym val)
 115          (if (set sym val)
 116              (define-key dired-mode-map "I" 'dired-info)
 117            (if (eq 'dired-info (lookup-key dired-mode-map "I"))
 118                (define-key dired-mode-map "I" nil))))
 119   :group 'dired-keys)
 120
 121 (defcustom dired-vm-read-only-folders nil
 122   "If non-nil, \\[dired-vm] will visit all folders read-only.
 123 If neither nil nor t, e.g. the symbol `if-file-read-only', only
 124 files not writable by you are visited read-only."
 125   :type '(choice (const :tag "off" nil)
 126                  (const :tag "on" t)
 127                  (other :tag "non-writable only" if-file-read-only))
 128   :group 'dired-x)
 129
 130 (defcustom dired-omit-size-limit 30000
 131   "Maximum size for the \"omitting\" feature.
 132 If nil, there is no maximum size."
 133   :type '(choice (const :tag "no maximum" nil) integer)
 134   :group 'dired-x)
 135
 136 ;; For backward compatibility
 137 (define-obsolete-variable-alias 'dired-omit-files-p 'dired-omit-mode "22.1")
 138 (define-minor-mode dired-omit-mode
 139   "Toggle omission of uninteresting files in Dired (Dired-Omit mode).
 140 With a prefix argument ARG, enable Dired-Omit mode if ARG is
 141 positive, and disable it otherwise.  If called from Lisp, enable
 142 the mode if ARG is omitted or nil.
 143
 144 Dired-Omit mode is a buffer-local minor mode.  When enabled in a
 145 Dired buffer, Dired does not list files whose filenames match
 146 regexp `dired-omit-files', nor files ending with extensions in
 147 `dired-omit-extensions'.
 148
 149 To enable omitting in every Dired buffer, you can put this in
 150 your init file:
 151
 152   (add-hook 'dired-mode-hook (lambda () (dired-omit-mode)))
 153
 154 See Info node `(dired-x) Omitting Variables' for more information."
 155   :group 'dired-x
 156   (if dired-omit-mode
 157       ;; This will mention how many lines were omitted:
 158       (let ((dired-omit-size-limit nil)) (dired-omit-expunge))
 159     (revert-buffer)))
 160
 161 (put 'dired-omit-mode 'safe-local-variable 'booleanp)
 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   :version "24.1"
 176   :type 'boolean
 177   :group 'dired-x)
 178
 179 (defcustom dired-find-subdir nil           ; t is pretty near to DWIM...
 180   "If non-nil, Dired always finds a directory in a buffer of its own.
 181 If nil, Dired finds the directory as a subdirectory in some other buffer
 182 if it is present as one.
 183
 184 If there are several dired buffers for a directory, the most recently
 185 used is chosen.
 186
 187 Dired avoids switching to the current buffer, so that if you have
 188 a normal and a wildcard buffer for the same directory, \\[dired] will
 189 toggle between those two."
 190   :type 'boolean
 191   :group 'dired-x)
 192
 193 (defcustom dired-enable-local-variables t
 194   "Control use of local-variables lists in Dired.
 195 This temporarily overrides the value of `enable-local-variables' when
 196 listing a directory.  See also `dired-local-variables-file'."
 197   :risky t
 198   :type '(choice (const :tag "Query Unsafe" t)
 199                  (const :tag "Safe Only" :safe)
 200                  (const :tag "Do all" :all)
 201                  (const :tag "Ignore" nil)
 202                  (other :tag "Query" other))
 203   :group 'dired-x)
 204
 205 (make-obsolete-variable 'dired-enable-local-variables
 206                         "use a standard `dir-locals-file' instead." "24.1")
 207
 208 (defcustom dired-guess-shell-gnutar
 209   (catch 'found
 210     (dolist (exe '("tar" "gtar"))
 211       (if (with-temp-buffer
 212             (ignore-errors (call-process exe nil t nil "--version"))
 213             (and (re-search-backward "GNU tar" nil t) t))
 214           (throw 'found exe))))
 215   "If non-nil, name of GNU tar executable.
 216 \(E.g., \"tar\" or \"gtar\").  The `z' switch will be used with it for
 217 compressed or gzip'ed tar files.  If you don't have GNU tar, set this
 218 to nil: a pipe using `zcat' or `gunzip -c' will be used."
 219   ;; Changed from system-type test to testing --version output.
 220   ;; Maybe test --help for -z instead?
 221   :version "24.1"
 222   :type '(choice (const :tag "Not GNU tar" nil)
 223                  (string :tag "Command name"))
 224   :group 'dired-x)
 225
 226 (defcustom dired-guess-shell-gzip-quiet t
 227   "Non-nil says pass -q to gzip overriding verbose GZIP environment."
 228   :type 'boolean
 229   :group 'dired-x)
 230
 231 (defcustom dired-guess-shell-znew-switches nil
 232   "If non-nil, then string of switches passed to `znew', example: \"-K\"."
 233   :type '(choice (const :tag "None" nil)
 234                  (string :tag "Switches"))
 235   :group 'dired-x)
 236
 237 (defcustom dired-clean-up-buffers-too t
 238   "Non-nil means offer to kill buffers visiting files and dirs deleted in Dired."
 239   :type 'boolean
 240   :group 'dired-x)
 241
 242 ;;; KEY BINDINGS.
 243
 244 (define-key dired-mode-map "\M-o" 'dired-omit-mode)
 245 (define-key dired-mode-map "*O" 'dired-mark-omitted)
 246 (define-key dired-mode-map "\M-(" 'dired-mark-sexp)
 247 (define-key dired-mode-map "*(" 'dired-mark-sexp)
 248 (define-key dired-mode-map "*." 'dired-mark-extension)
 249 (define-key dired-mode-map "\M-!" 'dired-smart-shell-command)
 250 (define-key dired-mode-map "\M-G" 'dired-goto-subdir)
 251 (define-key dired-mode-map "F" 'dired-do-find-marked-files)
 252 (define-key dired-mode-map "Y"  'dired-do-relsymlink)
 253 (define-key dired-mode-map "%Y" 'dired-do-relsymlink-regexp)
 254 (define-key dired-mode-map "V" 'dired-do-run-mail)
 255
 256 ;;; MENU BINDINGS
 257
 258 (require 'easymenu)
 259
 260 (let ((menu (lookup-key dired-mode-map [menu-bar])))
 261   (easy-menu-add-item menu '("Operate")
 262                       ["Find Files" dired-do-find-marked-files
 263                        :help "Find current or marked files"]
 264                       "Shell Command...")
 265   (easy-menu-add-item menu '("Operate")
 266                       ["Relative Symlink to..." dired-do-relsymlink
 267                        :visible (fboundp 'make-symbolic-link)
 268                        :help "Make relative symbolic links for current or \
 269 marked files"]
 270                       "Hardlink to...")
 271   (easy-menu-add-item menu '("Mark")
 272                       ["Flag Extension..." dired-flag-extension
 273                        :help "Flag files with a certain extension for deletion"]
 274                       "Mark Executables")
 275   (easy-menu-add-item menu '("Mark")
 276                       ["Mark Extension..." dired-mark-extension
 277                        :help "Mark files with a certain extension"]
 278                       "Unmark All")
 279   (easy-menu-add-item menu '("Mark")
 280                       ["Mark Omitted" dired-mark-omitted
 281                        :help "Mark files matching `dired-omit-files' \
 282 and `dired-omit-extensions'"]
 283                       "Unmark All")
 284   (easy-menu-add-item menu '("Regexp")
 285                       ["Relative Symlink..." dired-do-relsymlink-regexp
 286                        :visible (fboundp 'make-symbolic-link)
 287                        :help "Make relative symbolic links for files \
 288 matching regexp"]
 289                       "Hardlink...")
 290   (easy-menu-add-item menu '("Immediate")
 291                       ["Omit Mode" dired-omit-mode
 292                        :style toggle :selected dired-omit-mode
 293                        :help "Enable or disable omitting \"uninteresting\" \
 294 files"]
 295                       "Refresh"))
 296
 297 \f
 298 ;; Install into appropriate hooks.
 299
 300 (add-hook 'dired-mode-hook 'dired-extra-startup)
 301 (add-hook 'dired-after-readin-hook 'dired-omit-expunge)
 302
 303 (defun dired-extra-startup ()
 304   "Automatically put on `dired-mode-hook' to get extra Dired features:
 305 \\<dired-mode-map>
 306   \\[dired-do-run-mail]\t-- run mail on folder (see `dired-bind-vm')
 307   \\[dired-info]\t-- run info on file
 308   \\[dired-man]\t-- run man on file
 309   \\[dired-do-find-marked-files]\t-- visit all marked files simultaneously
 310   \\[dired-omit-mode]\t-- toggle omitting of files
 311   \\[dired-mark-sexp]\t-- mark by Lisp expression
 312
 313 To see the options you can set, use M-x customize-group RET dired-x RET.
 314 See also the functions:
 315   `dired-flag-extension'
 316   `dired-virtual'
 317   `dired-jump'
 318   `dired-man'
 319   `dired-vm'
 320   `dired-rmail'
 321   `dired-info'
 322   `dired-do-find-marked-files'"
 323   (interactive)
 324   ;; These must be done in each new dired buffer.
 325   (dired-hack-local-variables)
 326   (dired-omit-startup))
 327
 328 \f
 329 ;;; EXTENSION MARKING FUNCTIONS.
 330
 331 ;; Mark files with some extension.
 332 (defun dired-mark-extension (extension &optional marker-char)
 333   "Mark all files with a certain EXTENSION for use in later commands.
 334 A `.' is *not* automatically prepended to the string entered."
 335   ;; EXTENSION may also be a list of extensions instead of a single one.
 336   ;; Optional MARKER-CHAR is marker to use.
 337   (interactive "sMarking extension: \nP")
 338   (or (listp extension)
 339       (setq extension (list extension)))
 340   (dired-mark-files-regexp
 341    (concat ".";; don't match names with nothing but an extension
 342            "\\("
 343            (mapconcat 'regexp-quote extension "\\|")
 344            "\\)$")
 345    marker-char))
 346
 347 (defun dired-flag-extension (extension)
 348   "In dired, flag all files with a certain EXTENSION for deletion.
 349 A `.' is *not* automatically prepended to the string entered."
 350   (interactive "sFlagging extension: ")
 351   (dired-mark-extension extension dired-del-marker))
 352
 353 ;; Define some unpopular file extensions.  Used for cleaning and omitting.
 354
 355 (defvar dired-patch-unclean-extensions
 356   '(".rej" ".orig")
 357   "List of extensions of dispensable files created by the `patch' program.")
 358
 359 (defvar dired-tex-unclean-extensions
 360   '(".toc" ".log" ".aux");; these are already in completion-ignored-extensions
 361   "List of extensions of dispensable files created by TeX.")
 362
 363 (defvar dired-latex-unclean-extensions
 364   '(".idx" ".lof" ".lot" ".glo")
 365   "List of extensions of dispensable files created by LaTeX.")
 366
 367 (defvar dired-bibtex-unclean-extensions
 368   '(".blg" ".bbl")
 369   "List of extensions of dispensable files created by BibTeX.")
 370
 371 (defvar dired-texinfo-unclean-extensions
 372   '(".cp" ".cps" ".fn" ".fns" ".ky" ".kys" ".pg" ".pgs"
 373     ".tp" ".tps" ".vr" ".vrs")
 374   "List of extensions of dispensable files created by texinfo.")
 375
 376 (defun dired-clean-patch ()
 377   "Flag dispensable files created by patch for deletion.
 378 See variable `dired-patch-unclean-extensions'."
 379   (interactive)
 380   (dired-flag-extension dired-patch-unclean-extensions))
 381
 382 (defun dired-clean-tex ()
 383   "Flag dispensable files created by [La]TeX etc. for deletion.
 384 See variables `dired-tex-unclean-extensions',
 385 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions' and
 386 `dired-texinfo-unclean-extensions'."
 387   (interactive)
 388   (dired-flag-extension (append dired-texinfo-unclean-extensions
 389                                 dired-latex-unclean-extensions
 390                                 dired-bibtex-unclean-extensions
 391                                 dired-tex-unclean-extensions)))
 392
 393 (defun dired-very-clean-tex ()
 394   "Flag dispensable files created by [La]TeX *and* \".dvi\" for deletion.
 395 See variables `dired-texinfo-unclean-extensions',
 396 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions' and
 397 `dired-texinfo-unclean-extensions'."
 398   (interactive)
 399   (dired-flag-extension (append dired-texinfo-unclean-extensions
 400                                 dired-latex-unclean-extensions
 401                                 dired-bibtex-unclean-extensions
 402                                 dired-tex-unclean-extensions
 403                                 (list ".dvi"))))
 404 \f
 405 ;;; JUMP.
 406
 407 ;;;###autoload
 408 (defun dired-jump (&optional other-window file-name)
 409   "Jump to dired buffer corresponding to current buffer.
 410 If in a file, dired the current directory and move to file's line.
 411 If in Dired already, pop up a level and goto old directory's line.
 412 In case the proper dired file line cannot be found, refresh the dired
 413 buffer and try again.
 414 When OTHER-WINDOW is non-nil, jump to dired buffer in other window.
 415 Interactively with prefix argument, read FILE-NAME and
 416 move to its line in dired."
 417   (interactive
 418    (list nil (and current-prefix-arg
 419                   (read-file-name "Jump to dired file: "))))
 420   (let* ((file (or file-name buffer-file-name))
 421          (dir (if file (file-name-directory file) default-directory)))
 422     (if (and (eq major-mode 'dired-mode) (null file-name))
 423         (progn
 424           (setq dir (dired-current-directory))
 425           (dired-up-directory other-window)
 426           (unless (dired-goto-file dir)
 427               ;; refresh and try again
 428             (dired-insert-subdir (file-name-directory dir))
 429             (dired-goto-file dir)))
 430       (if other-window
 431           (dired-other-window dir)
 432         (dired dir))
 433       (if file
 434           (or (dired-goto-file file)
 435               ;; refresh and try again
 436               (progn
 437                 (dired-insert-subdir (file-name-directory file))
 438                 (dired-goto-file file))
 439               ;; Toggle omitting, if it is on, and try again.
 440               (when dired-omit-mode
 441                 (dired-omit-mode)
 442                 (dired-goto-file file)))))))
 443
 444 ;;;###autoload
 445 (defun dired-jump-other-window (&optional file-name)
 446   "Like \\[dired-jump] (`dired-jump') but in other window."
 447   (interactive
 448    (list (and current-prefix-arg
 449               (read-file-name "Jump to dired file: "))))
 450   (dired-jump t file-name))
 451 \f
 452 ;;; OMITTING.
 453
 454 ;; Enhanced omitting of lines from directory listings.
 455 ;; Marked files are never omitted.
 456
 457 ;; should probably get rid of this and always use 'no-dir.
 458 ;; sk 28-Aug-1991 09:37
 459 (defvar dired-omit-localp 'no-dir
 460   "The LOCALP argument `dired-omit-expunge' passes to `dired-get-filename'.
 461 If it is `no-dir', omitting is much faster, but you can only match
 462 against the non-directory part of the file name.  Set it to nil if you
 463 need to match the entire file name.")
 464
 465 ;; \017=^O for Omit - other packages can chose other control characters.
 466 (defvar dired-omit-marker-char ?\017
 467   "Temporary marker used by Dired-Omit.
 468 Should never be used as marker by the user or other packages.")
 469
 470 (defun dired-omit-startup ()
 471   (or (assq 'dired-omit-mode minor-mode-alist)
 472       (setq minor-mode-alist
 473             (append '((dired-omit-mode
 474                        (:eval (if (eq major-mode 'dired-mode)
 475                                   " Omit" ""))))
 476                     minor-mode-alist))))
 477
 478 (defun dired-mark-omitted ()
 479   "Mark files matching `dired-omit-files' and `dired-omit-extensions'."
 480   (interactive)
 481   (let ((dired-omit-mode nil)) (revert-buffer)) ;; Show omitted files
 482   (dired-mark-unmarked-files (dired-omit-regexp) nil nil dired-omit-localp))
 483
 484 (defcustom dired-omit-extensions
 485   (append completion-ignored-extensions
 486           dired-latex-unclean-extensions
 487           dired-bibtex-unclean-extensions
 488           dired-texinfo-unclean-extensions)
 489   "If non-nil, a list of extensions \(strings\) to omit from Dired listings.
 490 Defaults to elements of `completion-ignored-extensions',
 491 `dired-latex-unclean-extensions', `dired-bibtex-unclean-extensions', and
 492 `dired-texinfo-unclean-extensions'.
 493
 494 See interactive function `dired-omit-mode' \(\\[dired-omit-mode]\) and
 495 variables `dired-omit-mode' and `dired-omit-files'."
 496   :type '(repeat string)
 497   :group 'dired-x)
 498
 499 (defun dired-omit-expunge (&optional regexp)
 500   "Erases all unmarked files matching REGEXP.
 501 Does nothing if global variable `dired-omit-mode' is nil, or if called
 502   non-interactively and buffer is bigger than `dired-omit-size-limit'.
 503 If REGEXP is nil or not specified, uses `dired-omit-files', and also omits
 504   filenames ending in `dired-omit-extensions'.
 505 If REGEXP is the empty string, this function is a no-op.
 506
 507 This functions works by temporarily binding `dired-marker-char' to
 508 `dired-omit-marker-char' and calling `dired-do-kill-lines'."
 509   (interactive "sOmit files (regexp): ")
 510   (if (and dired-omit-mode
 511            (or (called-interactively-p 'interactive)
 512                (not dired-omit-size-limit)
 513                (< (buffer-size) dired-omit-size-limit)
 514                (progn
 515                  (when dired-omit-verbose
 516                    (message "Not omitting: directory larger than %d characters."
 517                             dired-omit-size-limit))
 518                  (setq dired-omit-mode nil)
 519                  nil)))
 520       (let ((omit-re (or regexp (dired-omit-regexp)))
 521             (old-modified-p (buffer-modified-p))
 522             count)
 523         (or (string= omit-re "")
 524             (let ((dired-marker-char dired-omit-marker-char))
 525               (when dired-omit-verbose (message "Omitting..."))
 526               (if (dired-mark-unmarked-files omit-re nil nil dired-omit-localp)
 527                   (progn
 528                     (setq count (dired-do-kill-lines
 529                                  nil
 530                                  (if dired-omit-verbose "Omitted %d line%s." "")))
 531                     (force-mode-line-update))
 532                 (when dired-omit-verbose (message "(Nothing to omit)")))))
 533         ;; Try to preserve modified state of buffer.  So `%*' doesn't appear
 534         ;; in mode-line of omitted buffers.
 535         (set-buffer-modified-p (and old-modified-p
 536                                     (save-excursion
 537                                       (goto-char (point-min))
 538                                       (re-search-forward dired-re-mark nil t))))
 539         count)))
 540
 541 (defun dired-omit-regexp ()
 542   (concat (if dired-omit-files (concat "\\(" dired-omit-files "\\)") "")
 543           (if (and dired-omit-files dired-omit-extensions) "\\|" "")
 544           (if dired-omit-extensions
 545               (concat ".";; a non-extension part should exist
 546                       "\\("
 547                       (mapconcat 'regexp-quote dired-omit-extensions "\\|")
 548                       "\\)$")
 549             "")))
 550
 551 ;; Returns t if any work was done, nil otherwise.
 552 (defun dired-mark-unmarked-files (regexp msg &optional unflag-p localp)
 553   "Mark unmarked files matching REGEXP, displaying MSG.
 554 REGEXP is matched against the entire file name.  When called
 555 interactively, prompt for REGEXP.
 556 With prefix argument, unflag all those files.
 557 Optional fourth argument LOCALP is as in `dired-get-filename'."
 558   (interactive
 559    (list (dired-read-regexp
 560           "Mark unmarked files matching regexp (default all): ")
 561          nil current-prefix-arg nil))
 562   (let ((dired-marker-char (if unflag-p ?\s dired-marker-char)))
 563     (dired-mark-if
 564      (and
 565       ;; not already marked
 566       (looking-at " ")
 567       ;; uninteresting
 568       (let ((fn (dired-get-filename localp t)))
 569         (and fn (string-match regexp fn))))
 570      msg)))
 571
 572 \f
 573 ;;; VIRTUAL DIRED MODE.
 574
 575 ;; For browsing `ls -lR' listings in a dired-like fashion.
 576
 577 (defalias 'virtual-dired 'dired-virtual)
 578 (defun dired-virtual (dirname &optional switches)
 579   "Put this buffer into Virtual Dired mode.
 580
 581 In Virtual Dired mode, all commands that do not actually consult the
 582 filesystem will work.
 583
 584 This is useful if you want to peruse and move around in an ls -lR
 585 output file, for example one you got from an ftp server.  With
 586 ange-ftp, you can even dired a directory containing an ls-lR file,
 587 visit that file and turn on virtual dired mode.  But don't try to save
 588 this file, as dired-virtual indents the listing and thus changes the
 589 buffer.
 590
 591 If you have save a Dired buffer in a file you can use \\[dired-virtual] to
 592 resume it in a later session.
 593
 594 Type \\<dired-mode-map>\\[revert-buffer] \
 595 in the Virtual Dired buffer and answer `y' to convert
 596 the virtual to a real dired buffer again.  You don't have to do this, though:
 597 you can relist single subdirs using \\[dired-do-redisplay]."
 598
 599   ;; DIRNAME is the top level directory of the buffer.  It will become
 600   ;; its `default-directory'.  If nil, the old value of
 601   ;; default-directory is used.
 602
 603   ;; Optional SWITCHES are the ls switches to use.
 604
 605   ;; Shell wildcards will be used if there already is a `wildcard'
 606   ;; line in the buffer (thus it is a saved Dired buffer), but there
 607   ;; is no other way to get wildcards.  Insert a `wildcard' line by
 608   ;; hand if you want them.
 609
 610   (interactive
 611    (list (read-string "Virtual Dired directory: " (dired-virtual-guess-dir))))
 612   (goto-char (point-min))
 613   (or (looking-at "  ")
 614       ;; if not already indented, do it now:
 615       (indent-region (point-min) (point-max) 2))
 616   (or dirname (setq dirname default-directory))
 617   (setq dirname (expand-file-name (file-name-as-directory dirname)))
 618   (setq default-directory dirname)      ; contains no wildcards
 619   (let ((wildcard (save-excursion
 620                     (goto-char (point-min))
 621                     (forward-line 1)
 622                     (and (looking-at "^  wildcard ")
 623                          (buffer-substring (match-end 0)
 624                                            (line-end-position))))))
 625   (if wildcard
 626         (setq dirname (expand-file-name wildcard default-directory))))
 627   ;; If raw ls listing (not a saved old dired buffer), give it a
 628   ;; decent subdir headerline:
 629   (goto-char (point-min))
 630   (or (looking-at dired-subdir-regexp)
 631       (insert "  "
 632               (directory-file-name (file-name-directory default-directory))
 633               ":\n"))
 634   (dired-mode dirname (or switches dired-listing-switches))
 635   (setq mode-name "Virtual Dired"
 636         revert-buffer-function 'dired-virtual-revert)
 637   (set (make-local-variable 'dired-subdir-alist) nil)
 638   (dired-build-subdir-alist)
 639   (goto-char (point-min))
 640   (dired-initial-position dirname))
 641
 642 (defun dired-virtual-guess-dir ()
 643   "Guess and return appropriate working directory of this buffer.
 644 The buffer is assumed to be in Dired or ls -lR format.  The guess is
 645 based upon buffer contents.  If nothing could be guessed, returns
 646 nil."
 647
 648   (let ((regexp "^\\(  \\)?\\([^ \n\r]*\\)\\(:\\)[\n\r]")
 649         (subexpr 2))
 650     (goto-char (point-min))
 651     (cond ((looking-at regexp)
 652            ;; If a saved dired buffer, look to which dir and
 653            ;; perhaps wildcard it belongs:
 654            (let ((dir (buffer-substring (match-beginning subexpr)
 655                                         (match-end subexpr))))
 656              (file-name-as-directory dir)))
 657           ;; Else no match for headerline found.  It's a raw ls listing.
 658           ;; In raw ls listings the directory does not have a headerline
 659           ;; try parent of first subdir, if any
 660           ((re-search-forward regexp nil t)
 661            (file-name-directory
 662             (directory-file-name
 663              (file-name-as-directory
 664               (buffer-substring (match-beginning subexpr)
 665                                 (match-end subexpr))))))
 666           (t                            ; if all else fails
 667            nil))))
 668
 669
 670 (defun dired-virtual-revert (&optional _arg _noconfirm)
 671   (if (not
 672        (y-or-n-p "Cannot revert a Virtual Dired buffer - switch to Real Dired mode? "))
 673       (error "Cannot revert a Virtual Dired buffer")
 674     (setq mode-name "Dired"
 675           revert-buffer-function 'dired-revert)
 676     (revert-buffer)))
 677
 678 ;; A zero-arg version of dired-virtual.
 679 (defun dired-virtual-mode ()
 680   "Put current buffer into Virtual Dired mode (see `dired-virtual').
 681 Useful on `magic-mode-alist' with the regexp
 682
 683   \"^  \\\\(/[^ /]+\\\\)+/?:$\"
 684
 685 to put saved dired buffers automatically into Virtual Dired mode.
 686
 687 Also useful for `auto-mode-alist' like this:
 688
 689   (add-to-list 'auto-mode-alist
 690                '(\"[^/]\\\\.dired\\\\'\" . dired-virtual-mode))"
 691   (interactive)
 692   (dired-virtual (dired-virtual-guess-dir)))
 693
 694 \f
 695 ;;; SMART SHELL.
 696
 697 ;; An Emacs buffer can have but one working directory, stored in the
 698 ;; buffer-local variable `default-directory'.  A Dired buffer may have
 699 ;; several subdirectories inserted, but still has but one working directory:
 700 ;; that of the top level Dired directory in that buffer.  For some commands
 701 ;; it is appropriate that they use the current Dired directory instead of
 702 ;; `default-directory', e.g., `find-file' and `compile'.  This is a general
 703 ;; mechanism is provided for special handling of the working directory in
 704 ;; special major modes.
 705
 706 (define-obsolete-variable-alias 'default-directory-alist
 707   'dired-default-directory-alist "24.1")
 708
 709 ;; It's easier to add to this alist than redefine function
 710 ;; default-directory while keeping the old information.
 711 (defconst dired-default-directory-alist
 712   '((dired-mode . (if (fboundp 'dired-current-directory)
 713                       (dired-current-directory)
 714                     default-directory)))
 715   "Alist of major modes and their opinion on `default-directory'.
 716 Each element has the form (MAJOR . EXPRESSION).
 717 The function `dired-default-directory' evaluates EXPRESSION to
 718 determine a default directory.")
 719
 720 (put 'dired-default-directory-alist 'risky-local-variable t) ; gets eval'd
 721 (make-obsolete-variable 'dired-default-directory-alist
 722                         "this feature is due to be removed." "24.1")
 723
 724 (defun dired-default-directory ()
 725   "Return the `dired-default-directory-alist' entry for the current major-mode.
 726 If none, return `default-directory'."
 727   ;; It looks like this was intended to be something of a "general"
 728   ;; feature, but it only ever seems to have been used in
 729   ;; dired-smart-shell-command, and doesn't seem worth keeping around.
 730   (declare (obsolete nil "24.1"))
 731   (or (eval (cdr (assq major-mode dired-default-directory-alist)))
 732       default-directory))
 733
 734 (defun dired-smart-shell-command (command &optional output-buffer error-buffer)
 735   "Like function `shell-command', but in the current Virtual Dired directory."
 736   (interactive
 737    (list
 738     (read-shell-command "Shell command: " nil nil
 739                         (cond
 740                          (buffer-file-name (file-relative-name buffer-file-name))
 741                          ((eq major-mode 'dired-mode) (dired-get-filename t t))))
 742     current-prefix-arg
 743     shell-command-default-error-buffer))
 744   (let ((default-directory (or (and (eq major-mode 'dired-mode)
 745                                     (dired-current-directory))
 746                                default-directory)))
 747     (shell-command command output-buffer error-buffer)))
 748
 749 \f
 750 ;;; LOCAL VARIABLES FOR DIRED BUFFERS.
 751
 752 ;; Brief Description  (This feature is obsolete as of Emacs 24.1)
 753 ;;
 754 ;; * `dired-extra-startup' is part of the `dired-mode-hook'.
 755 ;;
 756 ;; * `dired-extra-startup' calls `dired-hack-local-variables'
 757 ;;
 758 ;; * `dired-hack-local-variables' checks the value of
 759 ;;   `dired-local-variables-file'
 760 ;;
 761 ;; * Check if `dired-local-variables-file' is a non-nil string and is a
 762 ;;   filename found in the directory of the Dired Buffer being created.
 763 ;;
 764 ;; * If `dired-local-variables-file' satisfies the above, then temporarily
 765 ;;   include it in the Dired Buffer at the bottom.
 766 ;;
 767 ;; * Set `enable-local-variables' temporarily to the user variable
 768 ;;   `dired-enable-local-variables' and run `hack-local-variables' on the
 769 ;;   Dired Buffer.
 770
 771 (defcustom dired-local-variables-file (convert-standard-filename ".dired")
 772   "Filename, as string, containing local dired buffer variables to be hacked.
 773 If this file found in current directory, then it will be inserted into dired
 774 buffer and `hack-local-variables' will be run.  See Info node
 775 `(emacs)File Variables' for more information on local variables.
 776 See also `dired-enable-local-variables'."
 777   :type 'file
 778   :group 'dired)
 779
 780 (make-obsolete-variable 'dired-local-variables-file 'dir-locals-file "24.1")
 781
 782 (defun dired-hack-local-variables ()
 783   "Evaluate local variables in `dired-local-variables-file' for dired buffer."
 784   (declare (obsolete hack-dir-local-variables-non-file-buffer "24.1"))
 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 mode line shows the proper information.
 804          (dired-sort-set-mode-line))))
 805
 806 ;; Does not seem worth a dedicated command.
 807 ;; See the more general features in files-x.el.
 808 (defun dired-omit-here-always ()
 809   "Create `dir-locals-file' setting `dired-omit-mode' to t in `dired-mode'.
 810 If in a Dired buffer, reverts it."
 811   (declare (obsolete add-dir-local-variable "24.1"))
 812   (interactive)
 813   (if (file-exists-p dired-local-variables-file)
 814       (error "Old-style dired-local-variables-file `./%s' found;
 815 replace it with a dir-locals-file `./%s'"
 816              dired-local-variables-file
 817              dir-locals-file))
 818   (if (file-exists-p dir-locals-file)
 819       (message "File `./%s' already exists." dir-locals-file)
 820     (with-temp-buffer
 821       (insert "\
 822 \((dired-mode . ((subdirs . nil)
 823                 (dired-omit-mode . t))))\n")
 824       (write-file dir-locals-file))
 825     ;; Run extra-hooks and revert directory.
 826     (when (derived-mode-p 'dired-mode)
 827       (hack-dir-local-variables-non-file-buffer)
 828       (dired-extra-startup)
 829       (dired-revert))))
 830
 831 \f
 832 ;;; GUESS SHELL COMMAND.
 833
 834 ;; Brief Description:
 835 ;;;
 836 ;; * `dired-do-shell-command' is bound to `!' by dired.el.
 837 ;;;
 838 ;; * `dired-guess-shell-command' provides smarter defaults for
 839 ;;;    dired-aux.el's `dired-read-shell-command'.
 840 ;;;
 841 ;; * `dired-guess-shell-command' calls `dired-guess-default' with list of
 842 ;;;    marked files.
 843 ;;;
 844 ;; * Parse `dired-guess-shell-alist-user' and
 845 ;;;   `dired-guess-shell-alist-default' (in that order) for the first REGEXP
 846 ;;;   that matches the first file in the file list.
 847 ;;;
 848 ;; * If the REGEXP matches all the entries of the file list then evaluate
 849 ;;;   COMMAND, which is either a string or a Lisp expression returning a
 850 ;;;   string.  COMMAND may be a list of commands.
 851 ;;;
 852 ;; * Return this command to `dired-guess-shell-command' which prompts user
 853 ;;;   with it.  The list of commands is put into the list of default values.
 854 ;;;   If a command is used successfully then it is stored permanently in
 855 ;;;   `dired-shell-command-history'.
 856
 857 ;; Guess what shell command to apply to a file.
 858 (defvar dired-shell-command-history nil
 859   "History list for commands that read dired-shell commands.")
 860
 861 ;; Default list of shell commands.
 862
 863 ;; NOTE: Use `gunzip -c' instead of `zcat' on `.gz' files.  Some do not
 864 ;; install GNU zip's version of zcat.
 865
 866 (autoload 'Man-support-local-filenames "man")
 867
 868 (defvar dired-guess-shell-alist-default
 869   (list
 870    (list "\\.tar\\'"
 871          '(if dired-guess-shell-gnutar
 872               (concat dired-guess-shell-gnutar " xvf")
 873             "tar xvf")
 874          ;; Extract files into a separate subdirectory
 875          '(if dired-guess-shell-gnutar
 876               (concat "mkdir " (file-name-sans-extension file)
 877                       "; " dired-guess-shell-gnutar " -C "
 878                       (file-name-sans-extension file) " -xvf")
 879             (concat "mkdir " (file-name-sans-extension file)
 880                     "; tar -C " (file-name-sans-extension file) " -xvf"))
 881          ;; List archive contents.
 882          '(if dired-guess-shell-gnutar
 883               (concat dired-guess-shell-gnutar " tvf")
 884             "tar tvf"))
 885
 886    ;; REGEXPS for compressed archives must come before the .Z rule to
 887    ;; be recognized:
 888    (list "\\.tar\\.Z\\'"
 889          ;; Untar it.
 890          '(if dired-guess-shell-gnutar
 891               (concat dired-guess-shell-gnutar " zxvf")
 892             (concat "zcat * | tar xvf -"))
 893          ;; Optional conversion to gzip format.
 894          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 895                   " " dired-guess-shell-znew-switches))
 896
 897    ;; gzip'ed archives
 898    (list "\\.t\\(ar\\.\\)?gz\\'"
 899          '(if dired-guess-shell-gnutar
 900               (concat dired-guess-shell-gnutar " zxvf")
 901             (concat "gunzip -qc * | tar xvf -"))
 902          ;; Extract files into a separate subdirectory
 903          '(if dired-guess-shell-gnutar
 904               (concat "mkdir " (file-name-sans-extension file)
 905                       "; " dired-guess-shell-gnutar " -C "
 906                       (file-name-sans-extension file) " -zxvf")
 907             (concat "mkdir " (file-name-sans-extension file)
 908                     "; gunzip -qc * | tar -C "
 909                     (file-name-sans-extension file) " -xvf -"))
 910          ;; Optional decompression.
 911          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q" ""))
 912          ;; List archive contents.
 913          '(if dired-guess-shell-gnutar
 914               (concat dired-guess-shell-gnutar " ztvf")
 915             (concat "gunzip -qc * | tar tvf -")))
 916
 917    ;; bzip2'ed archives
 918    (list "\\.t\\(ar\\.bz2\\|bz\\)\\'"
 919          "bunzip2 -c * | tar xvf -"
 920          ;; Extract files into a separate subdirectory
 921          '(concat "mkdir " (file-name-sans-extension file)
 922                   "; bunzip2 -c * | tar -C "
 923                   (file-name-sans-extension file) " -xvf -")
 924          ;; Optional decompression.
 925          "bunzip2")
 926
 927    ;; xz'ed archives
 928    (list "\\.t\\(ar\\.\\)?xz\\'"
 929          "unxz -c * | tar xvf -"
 930          ;; Extract files into a separate subdirectory
 931          '(concat "mkdir " (file-name-sans-extension file)
 932                   "; unxz -c * | tar -C "
 933                   (file-name-sans-extension file) " -xvf -")
 934          ;; Optional decompression.
 935          "unxz")
 936
 937    '("\\.shar\\.Z\\'" "zcat * | unshar")
 938    '("\\.shar\\.g?z\\'" "gunzip -qc * | unshar")
 939
 940    '("\\.e?ps\\'" "ghostview" "xloadimage" "lpr")
 941    (list "\\.e?ps\\.g?z\\'" "gunzip -qc * | ghostview -"
 942          ;; Optional decompression.
 943          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
 944    (list "\\.e?ps\\.Z\\'" "zcat * | ghostview -"
 945          ;; Optional conversion to gzip format.
 946          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 947                   " " dired-guess-shell-znew-switches))
 948
 949    '("\\.patch\\'" "cat * | patch")
 950    (list "\\.patch\\.g?z\\'" "gunzip -qc * | patch"
 951          ;; Optional decompression.
 952          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
 953    (list "\\.patch\\.Z\\'" "zcat * | patch"
 954          ;; Optional conversion to gzip format.
 955          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 956                   " " dired-guess-shell-znew-switches))
 957
 958    ;; The following four extensions are useful with dired-man ("N" key)
 959    ;; FIXME "man ./" does not work with dired-do-shell-command,
 960    ;; because there seems to be no way for us to modify the filename,
 961    ;; only the command.  Hmph.  `dired-man' works though.
 962    (list "\\.\\(?:[0-9]\\|man\\)\\'"
 963          '(let ((loc (Man-support-local-filenames)))
 964             (cond ((eq loc 'man-db) "man -l")
 965                   ((eq loc 'man) "man ./")
 966                   (t
 967                    "cat * | tbl | nroff -man -h | col -b"))))
 968    (list "\\.\\(?:[0-9]\\|man\\)\\.g?z\\'"
 969          '(let ((loc (Man-support-local-filenames)))
 970             (cond ((eq loc 'man-db)
 971                    "man -l")
 972                   ((eq loc 'man)
 973                    "man ./")
 974                   (t "gunzip -qc * | tbl | nroff -man -h | col -b")))
 975          ;; Optional decompression.
 976          '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
 977    (list "\\.[0-9]\\.Z\\'"
 978          '(let ((loc (Man-support-local-filenames)))
 979             (cond ((eq loc 'man-db) "man -l")
 980                   ((eq loc 'man) "man ./")
 981                   (t "zcat * | tbl | nroff -man -h | col -b")))
 982          ;; Optional conversion to gzip format.
 983          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
 984                   " " dired-guess-shell-znew-switches))
 985    '("\\.pod\\'" "perldoc" "pod2man * | nroff -man")
 986
 987    '("\\.dvi\\'" "xdvi" "dvips")                ; preview and printing
 988    '("\\.au\\'" "play")                 ; play Sun audiofiles
 989    '("\\.mpe?g\\'\\|\\.avi\\'" "xine -p")
 990    '("\\.ogg\\'" "ogg123")
 991    '("\\.mp3\\'" "mpg123")
 992    '("\\.wav\\'" "play")
 993    '("\\.uu\\'" "uudecode")             ; for uudecoded files
 994    '("\\.hqx\\'" "mcvert")
 995    '("\\.sh\\'" "sh")                   ; execute shell scripts
 996    '("\\.xbm\\'" "bitmap")              ; view X11 bitmaps
 997    '("\\.gp\\'" "gnuplot")
 998    '("\\.p[bgpn]m\\'" "xloadimage")
 999    '("\\.gif\\'" "xloadimage")          ; view gif pictures
1000    '("\\.tif\\'" "xloadimage")
1001    '("\\.png\\'" "display")             ; xloadimage 4.1 doesn't grok PNG
1002    '("\\.jpe?g\\'" "xloadimage")
1003    '("\\.fig\\'" "xfig")                        ; edit fig pictures
1004    '("\\.out\\'" "xgraph")              ; for plotting purposes.
1005    '("\\.tex\\'" "latex" "tex")
1006    '("\\.texi\\(nfo\\)?\\'" "makeinfo" "texi2dvi")
1007    '("\\.pdf\\'" "xpdf")
1008    '("\\.doc\\'" "antiword" "strings")
1009    '("\\.rpm\\'" "rpm -qilp" "rpm -ivh")
1010    '("\\.dia\\'" "dia")
1011    '("\\.mgp\\'" "mgp")
1012
1013    ;; Some other popular archivers.
1014    (list "\\.zip\\'" "unzip" "unzip -l"
1015          ;; Extract files into a separate subdirectory
1016          '(concat "unzip" (if dired-guess-shell-gzip-quiet " -q")
1017                   " -d " (file-name-sans-extension file)))
1018    '("\\.zoo\\'" "zoo x//")
1019    '("\\.lzh\\'" "lharc x")
1020    '("\\.arc\\'" "arc x")
1021    '("\\.shar\\'" "unshar")
1022    '("\\.rar\\'" "unrar x")
1023    '("\\.7z\\'" "7z x")
1024
1025    ;; Compression.
1026    (list "\\.g?z\\'" '(concat "gunzip" (if dired-guess-shell-gzip-quiet " -q")))
1027    (list "\\.dz\\'" "dictunzip")
1028    (list "\\.bz2\\'" "bunzip2")
1029    (list "\\.xz\\'" "unxz")
1030    (list "\\.Z\\'" "uncompress"
1031          ;; Optional conversion to gzip format.
1032          '(concat "znew" (if dired-guess-shell-gzip-quiet " -q")
1033                   " " dired-guess-shell-znew-switches))
1034
1035    '("\\.sign?\\'" "gpg --verify"))
1036
1037   "Default alist used for shell command guessing.
1038 See `dired-guess-shell-alist-user'.")
1039
1040 (defcustom dired-guess-shell-alist-user nil
1041   "User-defined alist of rules for suggested commands.
1042 These rules take precedence over the predefined rules in the variable
1043 `dired-guess-shell-alist-default' (to which they are prepended).
1044
1045 Each element of this list looks like
1046
1047     \(REGEXP COMMAND...\)
1048
1049 where each COMMAND can either be a string or a Lisp expression that evaluates
1050 to a string.  If several COMMANDs are given, the first one will be the default
1051 and the rest will be added temporarily to the history and can be retrieved
1052 with \\[previous-history-element] (M-p) .
1053
1054 The variable `dired-guess-shell-case-fold-search' controls whether
1055 REGEXP is matched case-sensitively.
1056
1057 You can set this variable in your ~/.emacs.  For example, to add rules for
1058 `.foo' and `.bar' files, write
1059
1060  \(setq dired-guess-shell-alist-user
1061         '((\"\\\\.foo\\\\'\" \"FOO-COMMAND\")
1062           (\"\\\\.bar\\\\'\"
1063            (if condition
1064               \"BAR-COMMAND-1\"
1065             \"BAR-COMMAND-2\"))))"
1066   :group 'dired-x
1067   :type '(alist :key-type regexp :value-type (repeat sexp)))
1068
1069 (defcustom dired-guess-shell-case-fold-search t
1070   "If non-nil, `dired-guess-shell-alist-default' and
1071 `dired-guess-shell-alist-user' are matched case-insensitively."
1072   :group 'dired-x
1073   :type 'boolean)
1074
1075 (defun dired-guess-default (files)
1076   "Return a shell command, or a list of commands, appropriate for FILES.
1077 See `dired-guess-shell-alist-user'."
1078
1079   (let* ((case-fold-search dired-guess-shell-case-fold-search)
1080          ;; Prepend the user's alist to the default alist.
1081          (alist (append dired-guess-shell-alist-user
1082                         dired-guess-shell-alist-default))
1083          (file (car files))
1084          (flist (cdr files))
1085          elt regexp cmds)
1086
1087     ;; Find the first match in the alist for first file in FILES.
1088     (while alist
1089       (setq elt (car alist)
1090             regexp (car elt)
1091             alist (cdr alist))
1092       (if (string-match regexp file)
1093           (setq cmds (cdr elt)
1094                 alist nil)))
1095
1096     ;; If more than one file, see if all of FILES match regular expression.
1097     (while (and flist
1098                 (string-match regexp (car flist)))
1099       (setq flist (cdr flist)))
1100
1101     ;; If flist is still non-nil, then do not guess since this means that not
1102     ;; all the files in FILES were matched by the regexp.
1103     (setq cmds (and (not flist) cmds))
1104
1105     ;; Return commands or nil if flist is still non-nil.
1106     ;; Evaluate the commands in order that any logical testing will be done.
1107     (if (cdr cmds)
1108         (delete-dups (mapcar #'eval cmds))
1109       (eval (car cmds)))))              ; single command
1110
1111 (defun dired-guess-shell-command (prompt files)
1112   "Ask user with PROMPT for a shell command, guessing a default from FILES."
1113   (let ((default (dired-guess-default files))
1114         default-list val)
1115     (if (null default)
1116         ;; Nothing to guess
1117         (read-shell-command prompt nil 'dired-shell-command-history)
1118       (setq prompt (replace-regexp-in-string ": $" " " prompt))
1119       (if (listp default)
1120           ;; More than one guess
1121           (setq default-list default
1122                 default (car default)
1123                 prompt (concat
1124                         prompt
1125                         (format "{%d guesses} " (length default-list))))
1126         ;; Just one guess
1127         (setq default-list (list default)))
1128       ;; Put the first guess in the prompt but not in the initial value.
1129       (setq prompt (concat prompt (format "[%s]: " default)))
1130       ;; All guesses can be retrieved with M-n
1131       (setq val (read-shell-command prompt nil
1132                                     'dired-shell-command-history
1133                                     default-list))
1134       ;; If we got a return, then return default.
1135       (if (equal val "") default val))))
1136
1137 \f
1138 ;;; RELATIVE SYMBOLIC LINKS.
1139
1140 (declare-function make-symbolic-link "fileio.c")
1141
1142 (defvar dired-keep-marker-relsymlink ?S
1143   "See variable `dired-keep-marker-move'.")
1144
1145 (defun dired-make-relative-symlink (file1 file2 &optional ok-if-already-exists)
1146   "Make a symbolic link (pointing to FILE1) in FILE2.
1147 The link is relative (if possible), for example
1148
1149     \"/vol/tex/bin/foo\" \"/vol/local/bin/foo\"
1150
1151 results in
1152
1153     \"../../tex/bin/foo\" \"/vol/local/bin/foo\""
1154   (interactive "FRelSymLink: \nFRelSymLink %s: \np")
1155   (let (name1 name2 len1 len2 (index 0) sub)
1156     (setq file1 (expand-file-name file1)
1157           file2 (expand-file-name file2)
1158           len1 (length file1)
1159           len2 (length file2))
1160     ;; Find common initial file name components:
1161     (let (next)
1162       (while (and (setq next (string-match "/" file1 index))
1163                   (< (setq next (1+ next)) (min len1 len2))
1164                   ;; For the comparison, both substrings must end in
1165                   ;; `/', so NEXT is *one plus* the result of the
1166                   ;; string-match.
1167                   ;; E.g., consider the case of linking "/tmp/a/abc"
1168                   ;; to "/tmp/abc" erroneously giving "/tmp/a" instead
1169                   ;; of "/tmp/" as common initial component
1170                   (string-equal (substring file1 0 next)
1171                                 (substring file2 0 next)))
1172         (setq index next))
1173       (setq name2 file2
1174             sub (substring file1 0 index)
1175             name1 (substring file1 index)))
1176     (if (string-equal sub "/")
1177         ;; No common initial file name found
1178         (setq name1 file1)
1179       ;; Else they have a common parent directory
1180       (let ((tem (substring file2 index))
1181             (start 0)
1182             (count 0))
1183         ;; Count number of slashes we must compensate for ...
1184         (while (setq start (string-match "/" tem start))
1185           (setq count (1+ count)
1186                 start (1+ start)))
1187         ;; ... and prepend a "../" for each slash found:
1188         (dotimes (_n count)
1189           (setq name1 (concat "../" name1)))))
1190     (make-symbolic-link
1191      (directory-file-name name1)        ; must not link to foo/
1192                                         ; (trailing slash!)
1193      name2 ok-if-already-exists)))
1194
1195 (autoload 'dired-do-create-files "dired-aux")
1196
1197 ;;;###autoload
1198 (defun dired-do-relsymlink (&optional arg)
1199    "Relative symlink all marked (or next ARG) files into a directory.
1200 Otherwise make a relative symbolic link to the current file.
1201 This creates relative symbolic links like
1202
1203     foo -> ../bar/foo
1204
1205 not absolute ones like
1206
1207     foo -> /ugly/file/name/that/may/change/any/day/bar/foo
1208
1209 For absolute symlinks, use \\[dired-do-symlink]."
1210   (interactive "P")
1211   (dired-do-create-files 'relsymlink #'dired-make-relative-symlink
1212                            "RelSymLink" arg dired-keep-marker-relsymlink))
1213
1214 (autoload 'dired-mark-read-regexp "dired-aux")
1215 (autoload 'dired-do-create-files-regexp "dired-aux")
1216
1217 (defun dired-do-relsymlink-regexp (regexp newname &optional arg whole-name)
1218   "RelSymlink all marked files containing REGEXP to NEWNAME.
1219 See functions `dired-do-rename-regexp' and `dired-do-relsymlink'
1220 for more info."
1221   (interactive (dired-mark-read-regexp "RelSymLink"))
1222   (dired-do-create-files-regexp
1223    #'dired-make-relative-symlink
1224    "RelSymLink" arg regexp newname whole-name dired-keep-marker-relsymlink))
1225
1226 \f
1227 ;;; VISIT ALL MARKED FILES SIMULTANEOUSLY.
1228
1229 ;; Brief Description:
1230 ;;;
1231 ;; `dired-do-find-marked-files' is bound to `F' by dired-x.el.
1232 ;;;
1233 ;; * Use `dired-get-marked-files' to collect the marked files in the current
1234 ;;;   Dired Buffer into a list of filenames `FILE-LIST'.
1235 ;;;
1236 ;; * Pass FILE-LIST to `dired-simultaneous-find-file' all with
1237 ;;;   `dired-do-find-marked-files''s prefix argument NOSELECT.
1238 ;;;
1239 ;; * `dired-simultaneous-find-file' runs through FILE-LIST decrementing the
1240 ;;;   list each time.
1241 ;;;
1242 ;; * If NOSELECT is non-nil then just run `find-file-noselect' on each
1243 ;;;   element of FILE-LIST.
1244 ;;;
1245 ;; * If NOSELECT is nil then calculate the `size' of the window for each file
1246 ;;;   by dividing the `window-height' by length of FILE-LIST.  Thus, `size' is
1247 ;;;   cognizant of the window-configuration.
1248 ;;;
1249 ;; * If `size' is too small abort, otherwise run `find-file' on each element
1250 ;;;   of FILE-LIST giving each a window of height `size'.
1251
1252 (defun dired-do-find-marked-files (&optional noselect)
1253   "Find all marked files displaying all of them simultaneously.
1254 With optional NOSELECT just find files but do not select them.
1255
1256 The current window is split across all files marked, as evenly as possible.
1257 Remaining lines go to bottom-most window.  The number of files that can be
1258 displayed this way is restricted by the height of the current window and
1259 `window-min-height'.
1260
1261 To keep dired buffer displayed, type \\[split-window-below] first.
1262 To display just marked files, type \\[delete-other-windows] first."
1263   (interactive "P")
1264   (dired-simultaneous-find-file (dired-get-marked-files) noselect))
1265
1266 (defun dired-simultaneous-find-file (file-list noselect)
1267   "Visit all files in FILE-LIST and display them simultaneously.
1268 The current window is split across all files in FILE-LIST, as evenly as
1269 possible.  Remaining lines go to the bottom-most window.  The number of
1270 files that can be displayed this way is restricted by the height of the
1271 current window and the variable `window-min-height'.  With non-nil
1272 NOSELECT the files are merely found but not selected."
1273   ;; We don't make this function interactive because it is usually too clumsy
1274   ;; to specify FILE-LIST interactively unless via dired.
1275   (let (size)
1276     (if noselect
1277         ;; Do not select the buffer.
1278         (find-file-noselect (car file-list))
1279       ;; We will have to select the buffer.  Calculate and check window size.
1280       (setq size (/ (window-height) (length file-list)))
1281       (or (<= window-min-height size)
1282           (error "Too many files to visit simultaneously.  Try C-u prefix"))
1283       (find-file (car file-list)))
1284     ;; Decrement.
1285     (dolist (file (cdr file-list))
1286       (if noselect
1287           ;; Do not select the buffer.
1288           (find-file-noselect file)
1289         ;; Vertically split off a window of desired size.  Upper window will
1290         ;; have SIZE lines.  Select lower (larger) window.  We split it again.
1291         (select-window (split-window nil size))
1292         (find-file file)))))
1293
1294 \f
1295 ;;; MISCELLANEOUS COMMANDS.
1296
1297 ;; Run man on files.
1298
1299 (declare-function Man-getpage-in-background "man" (topic))
1300
1301 (defvar manual-program) ; from man.el
1302
1303 (defun dired-man ()
1304   "Run `man' on this file."
1305 ;; Used also to say: "Display old buffer if buffer name matches filename."
1306 ;; but I have no idea what that means.
1307   (interactive)
1308   (require 'man)
1309   (let* ((file (dired-get-filename))
1310          (manual-program (replace-regexp-in-string "\\*" "%s"
1311                           (dired-guess-shell-command
1312                            "Man command: " (list file)))))
1313     (Man-getpage-in-background file)))
1314
1315 ;; Run Info on files.
1316
1317 (defun dired-info ()
1318   "Run `info' on this file."
1319   (interactive)
1320   (info (dired-get-filename)))
1321
1322 ;; Run mail on mail folders.
1323
1324 (declare-function vm-visit-folder "ext:vm" (folder &optional read-only))
1325 (defvar vm-folder-directory)
1326
1327 (defun dired-vm (&optional read-only)
1328   "Run VM on this file.
1329 With optional prefix argument, visits the folder read-only.
1330 Otherwise obeys the value of `dired-vm-read-only-folders'."
1331   (interactive "P")
1332   (let ((dir (dired-current-directory))
1333         (fil (dired-get-filename)))
1334     (vm-visit-folder fil (or read-only
1335                              (eq t dired-vm-read-only-folders)
1336                              (and dired-vm-read-only-folders
1337                                   (not (file-writable-p fil)))))
1338     ;; So that pressing `v' inside VM does prompt within current directory:
1339     (set (make-local-variable 'vm-folder-directory) dir)))
1340
1341 (defun dired-rmail ()
1342   "Run RMAIL on this file."
1343   (interactive)
1344   (rmail (dired-get-filename)))
1345
1346 (defun dired-do-run-mail ()
1347   "If `dired-bind-vm' is non-nil, call `dired-vm', else call `dired-rmail'."
1348   (interactive)
1349   (if dired-bind-vm
1350       ;; Read mail folder using vm.
1351       (dired-vm)
1352     ;; Read mail folder using rmail.
1353     (dired-rmail)))
1354
1355 \f
1356 ;;; MISCELLANEOUS INTERNAL FUNCTIONS.
1357
1358 ;; This should be a builtin
1359 (defun dired-buffer-more-recently-used-p (buffer1 buffer2)
1360   "Return t if BUFFER1 is more recently used than BUFFER2.
1361 Considers buffers closer to the car of `buffer-list' to be more recent."
1362   (and (not (equal buffer1 buffer2))
1363        (memq buffer1 (buffer-list))
1364        (not (memq buffer1 (memq buffer2 (buffer-list))))))
1365
1366 ;; Same thing as `dired-buffers-for-dir' of dired.el? - lrd 11/23/93
1367 ;; (defun dired-buffers-for-dir-exact (dir)
1368 ;; ;; Return a list of buffers that dired DIR (a directory or wildcard)
1369 ;; ;; at top level, or as subdirectory.
1370 ;; ;; Top level matches must match the wildcard part too, if any.
1371 ;; ;; The list is in reverse order of buffer creation, most recent last.
1372 ;; ;; As a side effect, killed dired buffers for DIR are removed from
1373 ;; ;; dired-buffers.
1374 ;;   (let ((alist dired-buffers) result elt)
1375 ;;     (while alist
1376 ;;       (setq elt (car alist)
1377 ;;             alist (cdr alist))
1378 ;;       (let ((buf (cdr elt)))
1379 ;;         (if (buffer-name buf)
1380 ;;             ;; Top level must match exactly against dired-directory in
1381 ;;             ;; case one of them is a wildcard.
1382 ;;             (if (or (equal dir (with-current-buffer buf dired-directory))
1383 ;;                     (assoc dir (with-current-buffer buf dired-subdir-alist)))
1384 ;;                 (setq result (cons buf result)))
1385 ;;           ;; else buffer is killed - clean up:
1386 ;;           (setq dired-buffers (delq elt dired-buffers)))))
1387 ;;     result))
1388
1389 \f
1390 ;; Does anyone use this? - lrd 6/29/93.
1391 ;; Apparently people do use it. - lrd 12/22/97.
1392
1393 (with-no-warnings
1394   ;; Warnings are suppressed to avoid "global/dynamic var `X' lacks a prefix".
1395   ;; This is unbearably ugly, but not more than having global variables
1396   ;; named size, time, name or s, however practical it can be while writing
1397   ;; `dired-mark-sexp' predicates.
1398   (defvar inode)
1399   (defvar s)
1400   (defvar mode)
1401   (defvar nlink)
1402   (defvar uid)
1403   (defvar gid)
1404   (defvar size)
1405   (defvar time)
1406   (defvar name)
1407   (defvar sym))
1408
1409 (defun dired-mark-sexp (predicate &optional unflag-p)
1410   "Mark files for which PREDICATE returns non-nil.
1411 With a prefix arg, unmark or unflag those files instead.
1412
1413 PREDICATE is a lisp expression that can refer to the following symbols:
1414
1415     inode  [integer] the inode of the file (only for ls -i output)
1416     s      [integer] the size of the file for ls -s output
1417                      (usually in blocks or, with -k, in KByte)
1418     mode   [string]  file permission bits, e.g. \"-rw-r--r--\"
1419     nlink  [integer] number of links to file
1420     uid    [string]  owner
1421     gid    [string]  group  (If the gid is not displayed by ls,
1422                      this will still be set (to the same as uid))
1423     size   [integer] file size in bytes
1424     time   [string]  the time that ls displays, e.g. \"Feb 12 14:17\"
1425     name   [string]  the name of the file
1426     sym    [string]  if file is a symbolic link, the linked-to name, else \"\"
1427
1428 For example, use
1429
1430         (equal 0 size)
1431
1432 to mark all zero length files."
1433   ;; Using sym="" instead of nil avoids the trap of
1434   ;; (string-match "foo" sym) into which a user would soon fall.
1435   ;; Give `equal' instead of `=' in the example, as this works on
1436   ;; integers and strings.
1437   (interactive "xMark if (lisp expr): \nP")
1438   (message "%s" predicate)
1439   (let ((dired-marker-char (if unflag-p ?\040 dired-marker-char))
1440         inode s mode nlink uid gid size time name sym)
1441     (dired-mark-if
1442      (save-excursion
1443        (and
1444         ;; Sets vars
1445         ;;                inode s mode nlink uid gid size time name sym
1446
1447         ;; according to current file line.  Returns t for success, nil if
1448         ;; there is no file line.  Upon success, all variables are set, either
1449         ;; to nil or the appropriate value, so they need not be initialized.
1450         ;; Moves point within the current line.
1451         (dired-move-to-filename)
1452         (let (pos
1453               (mode-len 10) ; length of mode string
1454               ;; like in dired.el, but with subexpressions \1=inode, \2=s:
1455               (dired-re-inode-size "\\s *\\([0-9]*\\)\\s *\\([0-9]*\\) ?"))
1456           (beginning-of-line)
1457           (forward-char 2)
1458           (if (looking-at dired-re-inode-size)
1459               (progn
1460                 (goto-char (match-end 0))
1461                 (setq inode (string-to-number
1462                              (buffer-substring (match-beginning 1)
1463                                                (match-end 1)))
1464                       s (string-to-number
1465                          (buffer-substring (match-beginning 2)
1466                                            (match-end 2)))))
1467             (setq inode nil
1468                   s nil))
1469           (setq mode (buffer-substring (point) (+ mode-len (point))))
1470           (forward-char mode-len)
1471           (setq nlink (read (current-buffer)))
1472           ;; Karsten Wenger <kw@cis.uni-muenchen.de> fixed uid.
1473           (setq uid (buffer-substring (1+ (point))
1474                                       (progn (forward-word 1) (point))))
1475           (re-search-forward directory-listing-before-filename-regexp)
1476           (goto-char (match-beginning 1))
1477           (forward-char -1)
1478           (setq size (string-to-number
1479                       (buffer-substring (save-excursion
1480                                           (backward-word 1)
1481                                           (setq pos (point)))
1482                                         (point))))
1483           (goto-char pos)
1484           (backward-word 1)
1485           ;; if no gid is displayed, gid will be set to uid
1486           ;; but user will then not reference it anyway in PREDICATE.
1487           (setq gid (buffer-substring (save-excursion
1488                                         (forward-word 1) (point))
1489                                       (point))
1490                 time (buffer-substring (match-beginning 1)
1491                                        (1- (dired-move-to-filename)))
1492                 name (buffer-substring (point)
1493                                        (or
1494                                         (dired-move-to-end-of-filename t)
1495                                         (point)))
1496                 sym (if (looking-at " -> ")
1497                         (buffer-substring (progn (forward-char 4) (point))
1498                                           (line-end-position))
1499                       ""))
1500           t)
1501         (eval predicate)))
1502      (format "'%s file" predicate))))
1503
1504 \f
1505 ;;; FIND FILE AT POINT.
1506
1507 (defcustom dired-x-hands-off-my-keys t
1508   "Non-nil means don't remap `find-file' to `dired-x-find-file'.
1509 Similarly for `find-file-other-window' and `dired-x-find-file-other-window'.
1510 If you change this variable without using \\[customize] after `dired-x.el'
1511 is loaded then call \\[dired-x-bind-find-file]."
1512   :type 'boolean
1513   :initialize 'custom-initialize-default
1514   :set (lambda (symbol value)
1515          (set symbol value)
1516          (dired-x-bind-find-file))
1517   :group 'dired-x)
1518
1519 (defun dired-x-bind-find-file ()
1520   "Bind `dired-x-find-file' in place of `find-file' (or vice-versa).
1521 Similarly for `dired-x-find-file-other-window' and `find-file-other-window'.
1522 Binding direction based on `dired-x-hands-off-my-keys'."
1523   (interactive)
1524   (if (called-interactively-p 'interactive)
1525       (setq dired-x-hands-off-my-keys
1526             (not (y-or-n-p "Bind dired-x-find-file over find-file? "))))
1527   (define-key (current-global-map) [remap find-file]
1528     (if (not dired-x-hands-off-my-keys) 'dired-x-find-file))
1529   (define-key (current-global-map) [remap find-file-other-window]
1530     (if (not dired-x-hands-off-my-keys) 'dired-x-find-file-other-window)))
1531
1532 ;; Now call it so binding is correct.  This could go in the :initialize
1533 ;; slot, but then dired-x-bind-find-file has to be defined before the
1534 ;; defcustom, and we get free variable warnings.
1535 (dired-x-bind-find-file)
1536
1537 (defun dired-x-find-file (filename)
1538   "Edit file FILENAME.
1539 Like `find-file', except that when called interactively with a
1540 prefix argument, it offers the filename near point as a default."
1541   (interactive (list (dired-x-read-filename-at-point "Find file: ")))
1542   (find-file filename))
1543
1544 (defun dired-x-find-file-other-window (filename)
1545   "Edit file FILENAME, in another window.
1546 Like `find-file-other-window', except that when called interactively with
1547 a prefix argument, when it offers the filename near point as a default."
1548   (interactive (list (dired-x-read-filename-at-point "Find file: ")))
1549   (find-file-other-window filename))
1550
1551 ;;; Internal functions.
1552
1553 ;; Fixme: This should probably use `thing-at-point'.  -- fx
1554 (defun dired-filename-at-point ()
1555   "Return the filename closest to point, expanded.
1556 Point should be in or after a filename."
1557   (save-excursion
1558     ;; First see if just past a filename.
1559     (or (eobp)                             ; why?
1560         (when (looking-at "[] \t\n[{}()]") ; whitespace or some parens
1561           (skip-chars-backward " \n\t\r({[]})")
1562           (or (bobp) (backward-char 1))))
1563     (let ((filename-chars "-.[:alnum:]_/:$+@")
1564           start prefix)
1565       (if (looking-at (format "[%s]" filename-chars))
1566           (progn
1567             (skip-chars-backward filename-chars)
1568             (setq start (point)
1569                   prefix
1570                   ;; This is something to do with ange-ftp filenames.
1571                   ;; It convert foo@bar to /foo@bar.
1572                   ;; But when does the former occur in dired buffers?
1573                   (and (string-match
1574                         "^\\w+@"
1575                         (buffer-substring start (line-end-position)))
1576                        "/"))
1577             (if (string-match "[/~]" (char-to-string (preceding-char)))
1578                 (setq start (1- start)))
1579             (skip-chars-forward filename-chars))
1580         (error "No file found around point!"))
1581       ;; Return string.
1582       (expand-file-name (concat prefix (buffer-substring start (point)))))))
1583
1584 (defun dired-x-read-filename-at-point (prompt)
1585   "Return filename prompting with PROMPT with completion.
1586 If `current-prefix-arg' is non-nil, uses name at point as guess."
1587   (if current-prefix-arg
1588       (let ((guess (dired-filename-at-point)))
1589         (read-file-name prompt
1590                         (file-name-directory guess)
1591                         guess
1592                         nil (file-name-nondirectory guess)))
1593     (read-file-name prompt default-directory)))
1594
1595 (define-obsolete-function-alias 'read-filename-at-point
1596   'dired-x-read-filename-at-point "24.1") ; is this even needed?
1597 \f
1598 ;;; BUG REPORTS
1599
1600 (define-obsolete-function-alias 'dired-x-submit-report 'report-emacs-bug "24.1")
1601
1602 \f
1603 ;; As Barry Warsaw would say: "This might be useful..."
1604 (provide 'dired-x)
1605
1606 ;; Local Variables:
1607 ;; byte-compile-dynamic: t
1608 ;; generated-autoload-file: "dired.el"
1609 ;; End:
1610
1611 ;;; dired-x.el ends here