lisp/filecache.el

   1 ;;; filecache.el --- find files using a pre-loaded cache
   2
   3 ;; Copyright (C) 1996, 2000-2014 Free Software Foundation, Inc.
   4
   5 ;; Author:  Peter Breton <pbreton@cs.umb.edu>
   6 ;; Created: Sun Nov 10 1996
   7 ;; Keywords: convenience
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25 ;;
  26 ;; The file-cache package is an attempt to make it easy to locate files
  27 ;; by name, without having to remember exactly where they are located.
  28 ;; This is very handy when working with source trees. You can also add
  29 ;; frequently used files to the cache to create a hotlist effect.
  30 ;; The cache can be used with any interactive command which takes a
  31 ;; filename as an argument.
  32 ;;
  33 ;; It is worth noting that this package works best when most of the files
  34 ;; in the cache have unique names, or (if they have the same name) exist in
  35 ;; only a few directories. The worst case is many files all with
  36 ;; the same name and in different directories, for example a big source tree
  37 ;; with a Makefile in each directory. In such a case, you should probably
  38 ;; use an alternate strategy to find the files.
  39 ;;
  40 ;; ADDING FILES TO THE CACHE:
  41 ;;
  42 ;; Use the following functions to add items to the file cache:
  43 ;;
  44 ;;   * `file-cache-add-file': Adds a single file to the cache
  45 ;;
  46 ;;   * `file-cache-add-file-list': Adds a list of files to the cache
  47 ;;
  48 ;; The following functions use the regular expressions in
  49 ;; `file-cache-delete-regexps' to eliminate unwanted files:
  50 ;;
  51 ;;   * `file-cache-add-directory': Adds the files in a directory to the
  52 ;;     cache. You can also specify a regular expression to match the files
  53 ;;     which should be added.
  54 ;;
  55 ;;   * `file-cache-add-directory-list': Same as above, but acts on a list
  56 ;;     of directories. You can use `load-path', `exec-path' and the like.
  57 ;;
  58 ;;   * `file-cache-add-directory-using-find': Uses the `find' command to
  59 ;;     add a directory tree to the cache.
  60 ;;
  61 ;;   * `file-cache-add-directory-using-locate': Uses the `locate' command to
  62 ;;     add files matching a pattern to the cache.
  63 ;;
  64 ;;   * `file-cache-add-directory-recursively': Uses the find-lisp package to
  65 ;;     add all files matching a pattern to the cache.
  66 ;;
  67 ;; Use the function `file-cache-clear-cache' to remove all items from the
  68 ;; cache. There are a number of `file-cache-delete' functions provided
  69 ;; as well, but in general it is probably better to not worry too much
  70 ;; about extra files in the cache.
  71 ;;
  72 ;; The most convenient way to initialize the cache is with an
  73 ;; `eval-after-load' function, as noted in the ADDING FILES
  74 ;; AUTOMATICALLY section.
  75 ;;
  76 ;; FINDING FILES USING THE CACHE:
  77 ;;
  78 ;; You can use the file-cache with any function that expects a filename as
  79 ;; an argument. For example:
  80 ;;
  81 ;; 1) Invoke a function which expects a filename as an argument:
  82 ;;    M-x find-file
  83 ;;
  84 ;; 2) Begin typing a file name.
  85 ;;
  86 ;; 3) Invoke `file-cache-minibuffer-complete' (bound by default to
  87 ;; C-TAB) to complete on the filename using the cache.
  88 ;;
  89 ;; 4) When you have found a unique completion, the minibuffer contents
  90 ;; will change to the full name of that file.
  91 ;;
  92 ;; If there are a number of directories which contain the completion,
  93 ;; invoking `file-cache-minibuffer-complete' repeatedly will cycle through
  94 ;; them.
  95 ;;
  96 ;; 5) You can then edit the minibuffer contents, or press RETURN.
  97 ;;
  98 ;; It is much easier to simply try it than trying to explain it :)
  99 ;;
 100 ;;; ADDING FILES AUTOMATICALLY
 101 ;;
 102 ;; For maximum utility, you should probably define an `eval-after-load'
 103 ;; form which loads your favorite files:
 104 ;;
 105 ;;      (eval-after-load
 106 ;;       "filecache"
 107 ;;       '(progn
 108 ;;          (message "Loading file cache...")
 109 ;;          (file-cache-add-directory-using-find "~/projects")
 110 ;;          (file-cache-add-directory-list load-path)
 111 ;;          (file-cache-add-directory "~/")
 112 ;;          (file-cache-add-file-list (list "~/foo/bar" "~/baz/bar"))
 113 ;;         ))
 114 ;;
 115 ;; If you clear and reload the cache frequently, it is probably easiest
 116 ;; to put your initializations in a function:
 117 ;;
 118 ;;   (eval-after-load
 119 ;;     "filecache"
 120 ;;      '(my-file-cache-initialize))
 121 ;;
 122 ;;   (defun my-file-cache-initialize ()
 123 ;;      (interactive)
 124 ;;      (message "Loading file cache...")
 125 ;;      (file-cache-add-directory-using-find "~/projects")
 126 ;;      (file-cache-add-directory-list load-path)
 127 ;;      (file-cache-add-directory "~/")
 128 ;;      (file-cache-add-file-list (list "~/foo/bar" "~/baz/bar"))
 129 ;;   ))
 130 ;;
 131 ;; Of course, you can still add files to the cache afterwards, via
 132 ;; Lisp functions.
 133 ;;
 134 ;; RELATED WORK:
 135 ;;
 136 ;; This package is a distant relative of Noah Friedman's fff utilities.
 137 ;; Our goal is pretty similar, but the implementation strategies are
 138 ;; different.
 139
 140 ;;; Code:
 141
 142 (defgroup file-cache nil
 143   "Find files using a pre-loaded cache."
 144   :group 'files
 145   :group 'convenience
 146   :prefix "file-cache-")
 147
 148 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 149 ;; Customization Variables
 150 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 151
 152 ;; User-modifiable variables
 153 (defcustom file-cache-filter-regexps
 154   ;; These are also used in buffers containing lines of file names,
 155   ;; so the end-of-name is matched with $ rather than \\'.
 156   (list "~$" "\\.o$" "\\.exe$" "\\.a$" "\\.elc$" ",v$" "\\.output$"
 157         "\\.$" "#$" "\\.class$")
 158   "List of regular expressions used as filters by the file cache.
 159 File names which match these expressions will not be added to the cache.
 160 Note that the functions `file-cache-add-file' and `file-cache-add-file-list'
 161 do not use this variable."
 162   :type '(repeat regexp)
 163   :group 'file-cache)
 164
 165 (defcustom file-cache-find-command "find"
 166   "External program used by `file-cache-add-directory-using-find'."
 167   :type 'string
 168   :group 'file-cache)
 169
 170 (defcustom file-cache-find-command-posix-flag 'not-defined
 171   "Set to t, if `file-cache-find-command' handles wildcards POSIX style.
 172 This variable is automatically set to nil or non-nil
 173 if it has the initial value `not-defined' whenever you first
 174 call the `file-cache-add-directory-using-find'.
 175
 176 Under Windows operating system where Cygwin is available, this value
 177 should be t."
 178   :type  '(choice (const :tag "Yes" t)
 179                   (const :tag "No" nil)
 180                   (const :tag "Unknown" not-defined))
 181   :group 'file-cache)
 182
 183 (defcustom file-cache-locate-command "locate"
 184   "External program used by `file-cache-add-directory-using-locate'."
 185   :type 'string
 186   :group 'file-cache)
 187
 188 ;; Minibuffer messages
 189 (defcustom file-cache-no-match-message " [File Cache: No match]"
 190   "Message to display when there is no completion."
 191   :type 'string
 192   :group 'file-cache)
 193
 194 (defcustom file-cache-sole-match-message " [File Cache: sole completion]"
 195   "Message to display when there is only one completion."
 196   :type 'string
 197   :group 'file-cache)
 198
 199 (defcustom file-cache-non-unique-message
 200   " [File Cache: complete but not unique]"
 201   "Message to display when there is a non-unique completion."
 202   :type 'string
 203   :group 'file-cache)
 204
 205 (defcustom file-cache-completion-ignore-case
 206   (if (memq system-type '(ms-dos windows-nt cygwin))
 207       t
 208      completion-ignore-case)
 209   "If non-nil, file-cache completion should ignore case.
 210 Defaults to the value of `completion-ignore-case'."
 211   :type 'boolean
 212   :group 'file-cache)
 213
 214 (defcustom file-cache-case-fold-search
 215   (if (memq system-type '(ms-dos windows-nt cygwin))
 216       t
 217     case-fold-search)
 218   "If non-nil, file-cache completion should ignore case.
 219 Defaults to the value of `case-fold-search'."
 220   :type 'boolean
 221   :group 'file-cache)
 222
 223 (defcustom file-cache-ignore-case
 224   (memq system-type '(ms-dos windows-nt cygwin))
 225   "Non-nil means ignore case when checking completions in the file cache.
 226 Defaults to nil on DOS and Windows, and t on other systems."
 227   :type 'boolean
 228   :group 'file-cache)
 229
 230 (defvar file-cache-multiple-directory-message nil)
 231
 232 ;; Internal variables
 233 ;; This should be named *Completions* because that's what the function
 234 ;; switch-to-completions in simple.el expects
 235 (defcustom file-cache-completions-buffer "*Completions*"
 236   "Buffer to display completions when using the file cache."
 237   :type 'string
 238   :group 'file-cache)
 239
 240 (defcustom file-cache-buffer "*File Cache*"
 241   "Buffer to hold the cache of file names."
 242   :type 'string
 243   :group 'file-cache)
 244
 245 (defcustom file-cache-buffer-default-regexp "^.+$"
 246   "Regexp to match files in `file-cache-buffer'."
 247   :type 'regexp
 248   :group 'file-cache)
 249
 250 (defvar file-cache-last-completion nil)
 251
 252 (defvar file-cache-alist nil
 253   "Internal data structure to hold cache of file names.
 254 It is a list of entries of the form (FILENAME DIRNAME1 DIRNAME2 ...)
 255 where FILENAME is a file name component and the entry represents N
 256 files of names DIRNAME1/FILENAME, DIRNAME2/FILENAME, ...")
 257
 258 (defvar file-cache-completions-keymap
 259   (let ((map (make-sparse-keymap)))
 260     (set-keymap-parent map completion-list-mode-map)
 261     (define-key map [mouse-2] 'file-cache-choose-completion)
 262     (define-key map "\C-m" 'file-cache-choose-completion)
 263     map)
 264   "Keymap for file cache completions buffer.")
 265
 266 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 267 ;; Functions to add files to the cache
 268 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 269
 270 (defun file-cache--read-list (file op-prompt)
 271   (let* ((fun (if file 'read-file-name 'read-directory-name))
 272          (type (if file "file" "directory"))
 273          (prompt-1 (concat op-prompt " " type ": "))
 274          (prompt-2 (concat op-prompt " another " type "?"))
 275          (continue t)
 276          result)
 277     (while continue
 278       (push (funcall fun prompt-1 nil nil t) result)
 279       (setq continue (y-or-n-p prompt-2)))
 280     (nreverse result)))
 281
 282 ;;;###autoload
 283 (defun file-cache-add-directory (directory &optional regexp)
 284   "Add all files in DIRECTORY to the file cache.
 285 If called from Lisp with a non-nil REGEXP argument is non-nil,
 286 only add files whose names match REGEXP."
 287   (interactive (list (read-directory-name "Add files from directory: "
 288                                           nil nil t)
 289                      nil))
 290   ;; Not an error, because otherwise we can't use load-paths that
 291   ;; contain non-existent directories.
 292   (when (file-accessible-directory-p directory)
 293     (let* ((dir       (expand-file-name directory))
 294            (dir-files (directory-files dir t regexp)))
 295       ;; Filter out files we don't want to see
 296       (dolist (file dir-files)
 297         (if (file-directory-p file)
 298             (setq dir-files (delq file dir-files))
 299           (dolist (regexp file-cache-filter-regexps)
 300             (if (string-match regexp file)
 301                 (setq dir-files (delq file dir-files))))))
 302       (file-cache-add-file-list dir-files))))
 303
 304 ;;;###autoload
 305 (defun file-cache-add-directory-list (directories &optional regexp)
 306   "Add DIRECTORIES (a list of directory names) to the file cache.
 307 If called interactively, read the directory names one by one.
 308 If the optional REGEXP argument is non-nil, only files which match it
 309 will be added to the cache.  Note that the REGEXP is applied to the
 310 files in each directory, not to the directory list itself."
 311   (interactive (list (file-cache--read-list nil "Add")))
 312   (dolist (dir directories)
 313     (file-cache-add-directory dir regexp))
 314   (let ((n (length directories)))
 315     (message "Filecache: cached file names from %d director%s."
 316              n (if (= n 1) "y" "ies"))))
 317
 318 (defun file-cache-add-file-list (files)
 319   "Add FILES (a list of file names) to the file cache.
 320 If called interactively, read the file names one by one."
 321   (interactive (list (file-cache--read-list t "Add")))
 322   (dolist (f files)
 323     (file-cache-add-file f))
 324   (let ((n (length files)))
 325     (message "Filecache: cached %d file name%s."
 326              n (if (= n 1) "" "s"))))
 327
 328 ;; Workhorse function
 329
 330 ;;;###autoload
 331 (defun file-cache-add-file (file)
 332   "Add FILE to the file cache."
 333   (interactive "fAdd File: ")
 334   (setq file (file-truename file))
 335   (unless (file-exists-p file)
 336     (error "Filecache: file %s does not exist" file))
 337   (let* ((file-name (file-name-nondirectory file))
 338          (dir-name  (file-name-directory file))
 339          (the-entry (assoc-string file-name file-cache-alist
 340                                   file-cache-ignore-case)))
 341     (cond ((null the-entry)
 342            ;; If the entry wasn't in the cache, add it.
 343            (push (list file-name dir-name) file-cache-alist)
 344            (if (called-interactively-p 'interactive)
 345                (message "Filecache: cached file name %s." file)))
 346           ((not (member dir-name (cdr the-entry)))
 347            (setcdr the-entry (cons dir-name (cdr the-entry)))
 348            (if (called-interactively-p 'interactive)
 349                (message "Filecache: cached file name %s." file)))
 350           (t
 351            (if (called-interactively-p 'interactive)
 352                (message "Filecache: %s is already cached." file))))))
 353
 354 ;;;###autoload
 355 (defun file-cache-add-directory-using-find (directory)
 356   "Use the `find' command to add files to the file cache.
 357 Find is run in DIRECTORY."
 358   (interactive "DAdd files under directory: ")
 359   (let ((dir (expand-file-name directory)))
 360     (when (memq system-type '(windows-nt cygwin))
 361       (if (eq file-cache-find-command-posix-flag 'not-defined)
 362           (setq file-cache-find-command-posix-flag
 363                 (executable-command-find-posix-p file-cache-find-command))))
 364     (set-buffer (get-buffer-create file-cache-buffer))
 365     (erase-buffer)
 366     (call-process file-cache-find-command nil
 367                   (get-buffer file-cache-buffer) nil
 368                   dir "-name"
 369                   (if (memq system-type '(windows-nt cygwin))
 370                       (if file-cache-find-command-posix-flag
 371                           "\\*"
 372                         "'*'")
 373                     "*")
 374                   "-print")
 375     (file-cache-add-from-file-cache-buffer)))
 376
 377 ;;;###autoload
 378 (defun file-cache-add-directory-using-locate (string)
 379   "Use the `locate' command to add files to the file cache.
 380 STRING is passed as an argument to the locate command."
 381   (interactive "sAdd files using locate string: ")
 382   (set-buffer (get-buffer-create file-cache-buffer))
 383   (erase-buffer)
 384   (call-process file-cache-locate-command nil
 385                 (get-buffer file-cache-buffer) nil
 386                 string)
 387   (file-cache-add-from-file-cache-buffer))
 388
 389 (autoload 'find-lisp-find-files "find-lisp")
 390
 391 ;;;###autoload
 392 (defun file-cache-add-directory-recursively  (dir &optional regexp)
 393   "Adds DIR and any subdirectories to the file-cache.
 394 This function does not use any external programs.
 395 If the optional REGEXP argument is non-nil, only files which match it
 396 will be added to the cache.  Note that the REGEXP is applied to the
 397 files in each directory, not to the directory list itself."
 398   (interactive "DAdd directory: ")
 399   (mapcar
 400    (lambda (file)
 401      (or (file-directory-p file)
 402          (let (filtered)
 403            (dolist (regexp file-cache-filter-regexps)
 404              (and (string-match regexp file)
 405                   (setq filtered t)))
 406            filtered)
 407          (file-cache-add-file file)))
 408    (find-lisp-find-files dir (or regexp "^"))))
 409
 410 (defun file-cache-add-from-file-cache-buffer (&optional regexp)
 411   "Add any entries found in the file cache buffer.
 412 Each entry matches the regular expression `file-cache-buffer-default-regexp'
 413 or the optional REGEXP argument."
 414   (set-buffer file-cache-buffer)
 415   (dolist (elt file-cache-filter-regexps)
 416     (goto-char (point-min))
 417     (delete-matching-lines elt))
 418   (goto-char (point-min))
 419   (let ((full-filename))
 420     (while (re-search-forward
 421             (or regexp file-cache-buffer-default-regexp)
 422             (point-max) t)
 423       (setq full-filename (buffer-substring-no-properties
 424                       (match-beginning 0) (match-end 0)))
 425       (file-cache-add-file full-filename))))
 426
 427 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 428 ;; Functions to delete from the cache
 429 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 430
 431 (defun file-cache-clear-cache ()
 432   "Clear the file cache."
 433   (interactive)
 434   (setq file-cache-alist nil))
 435
 436 ;; This clears *all* files with the given name
 437 (defun file-cache-delete-file (file)
 438   "Delete FILE (a relative file name) from the file cache.
 439 Return nil if FILE was not in the file cache, non-nil otherwise."
 440   (interactive
 441    (list (completing-read "Delete file from cache: " file-cache-alist)))
 442   (let ((elt (assoc-string file file-cache-alist file-cache-ignore-case)))
 443     (setq file-cache-alist (delq elt file-cache-alist))
 444     elt))
 445
 446 (defun file-cache-delete-file-list (files &optional message)
 447   "Delete FILES (a list of files) from the file cache.
 448 If called interactively, read the file names one by one.
 449 If MESSAGE is non-nil, or if called interactively, print a
 450 message reporting the number of file names deleted."
 451   (interactive (list (file-cache--read-list t "Uncache") t))
 452   (let ((n 0))
 453     (dolist (f files)
 454       (if (file-cache-delete-file f)
 455           (setq n (1+ n))))
 456     (when message
 457       (message "Filecache: uncached %d file name%s."
 458                n (if (= n 1) "" "s")))))
 459
 460 (defun file-cache-delete-file-regexp (regexp)
 461   "Delete files matching REGEXP from the file cache."
 462   (interactive "sRegexp: ")
 463   (let ((delete-list))
 464     (dolist (elt file-cache-alist)
 465       (and (string-match regexp (car elt))
 466            (push (car elt) delete-list)))
 467     (file-cache-delete-file-list delete-list)))
 468
 469 (defun file-cache-delete-directory (directory)
 470   "Delete DIRECTORY from the file cache."
 471   (interactive "DDelete directory from file cache: ")
 472   (let ((dir (expand-file-name directory))
 473         (n 0))
 474     (dolist (entry file-cache-alist)
 475       (if (file-cache-do-delete-directory dir entry)
 476           (setq n (1+ n))))
 477     (message "Filecache: uncached %d file name%s."
 478              n (if (= n 1) "" "s"))))
 479
 480 (defun file-cache-do-delete-directory (dir entry)
 481   (let ((directory-list (cdr entry))
 482         (directory (file-cache-canonical-directory dir)))
 483     (and (member directory directory-list)
 484          (if (equal 1 (length directory-list))
 485              (setq file-cache-alist
 486                    (delq entry file-cache-alist))
 487            (setcdr entry (delete directory directory-list))))))
 488
 489 (defun file-cache-delete-directory-list (directories)
 490   "Delete DIRECTORIES (a list of directory names) from the file cache.
 491 If called interactively, read the directory names one by one."
 492   (interactive (list (file-cache--read-list nil "Uncache")))
 493   (dolist (d directories)
 494     (file-cache-delete-directory d)))
 495
 496 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 497 ;; Utility functions
 498 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 499
 500 ;; Returns the name of a directory for a file in the cache
 501 (defun file-cache-directory-name  (file)
 502   (let* ((directory-list (cdr (assoc-string
 503                                file file-cache-alist
 504                                file-cache-ignore-case)))
 505          (len            (length directory-list))
 506          (directory)
 507          (num))
 508     (if (not (listp directory-list))
 509         (error "Filecache: unknown type in file-cache-alist for key %s" file))
 510     (cond
 511      ;; Single element
 512      ((eq 1 len)
 513       (setq directory (elt directory-list 0)))
 514      ;; No elements
 515      ((eq 0 len)
 516       (error "Filecache: no directory found for key %s" file))
 517      ;; Multiple elements
 518      (t
 519       (let* ((minibuffer-dir (file-name-directory (minibuffer-contents)))
 520              (dir-list       (member minibuffer-dir directory-list)))
 521         (setq directory
 522               ;; If the directory is in the list, return the next element
 523               ;; Otherwise, return the first element
 524               (if dir-list
 525                   (or (elt directory-list
 526                            (setq num (1+ (- len (length dir-list)))))
 527                       (elt directory-list (setq num 0)))
 528                 (elt directory-list (setq num 0)))))))
 529     ;; If there were multiple directories, set up a minibuffer message
 530     (setq file-cache-multiple-directory-message
 531           (and num (format " [%d of %d]" (1+ num) len)))
 532     directory))
 533
 534 ;; Returns the name of a file in the cache
 535 (defun file-cache-file-name  (file)
 536   (let ((directory (file-cache-directory-name file)))
 537     (concat directory file)))
 538
 539 ;; Return a canonical directory for comparison purposes.
 540 ;; Such a directory ends with a forward slash.
 541 (defun file-cache-canonical-directory (dir)
 542   (let ((directory dir))
 543     (if (not (char-equal ?/ (string-to-char (substring directory -1))))
 544         (concat directory "/")
 545       directory)))
 546
 547 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 548 ;; Minibuffer functions
 549 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 550
 551 ;; The prefix argument works around a bug in the minibuffer completion.
 552 ;; The completion function doesn't distinguish between the states:
 553 ;;
 554 ;;   "Multiple completions of name" (eg, Makefile, Makefile.in)
 555 ;;   "Name available in multiple directories" (/tmp/Makefile, ~me/Makefile)
 556 ;;
 557 ;; The default is to do the former; a prefix arg forces the latter.
 558
 559 ;;;###autoload
 560 (defun file-cache-minibuffer-complete (arg)
 561   "Complete a filename in the minibuffer using a preloaded cache.
 562 Filecache does two kinds of substitution: it completes on names in
 563 the cache, and, once it has found a unique name, it cycles through
 564 the directories that the name is available in.  With a prefix argument,
 565 the name is considered already unique; only the second substitution
 566 \(directories) is done."
 567   (interactive "P")
 568   (let*
 569       (
 570        (completion-ignore-case file-cache-completion-ignore-case)
 571        (case-fold-search       file-cache-case-fold-search)
 572        (string                 (file-name-nondirectory (minibuffer-contents)))
 573        (completion-string      (try-completion string file-cache-alist))
 574        (completion-list)
 575        (len)
 576        (file-cache-string))
 577     (cond
 578      ;; If it's the only match, replace the original contents
 579      ((or arg (eq completion-string t))
 580       (setq file-cache-string (file-cache-file-name string))
 581       (if (string= file-cache-string (minibuffer-contents))
 582           (minibuffer-message file-cache-sole-match-message)
 583         (delete-minibuffer-contents)
 584         (insert file-cache-string)
 585         (if file-cache-multiple-directory-message
 586             (minibuffer-message file-cache-multiple-directory-message))))
 587
 588      ;; If it's the longest match, insert it
 589      ((stringp completion-string)
 590       ;; If we've already inserted a unique string, see if the user
 591       ;; wants to use that one
 592       (if (and (string= string completion-string)
 593                (assoc-string string file-cache-alist
 594                              file-cache-ignore-case))
 595           (if (and (eq last-command this-command)
 596                    (string= file-cache-last-completion completion-string))
 597               (progn
 598                 (delete-minibuffer-contents)
 599                 (insert (file-cache-file-name completion-string))
 600                 (setq file-cache-last-completion nil))
 601             (minibuffer-message file-cache-non-unique-message)
 602             (setq file-cache-last-completion string))
 603         (setq file-cache-last-completion string)
 604         (setq completion-list (all-completions string file-cache-alist)
 605               len             (length completion-list))
 606         (if (> len 1)
 607             (progn
 608               (goto-char (point-max))
 609               (insert
 610                (substring completion-string (length string)))
 611               ;; Add our own setup function to the Completions Buffer
 612               (let ((completion-setup-hook
 613                      (append completion-setup-hook
 614                              (list 'file-cache-completion-setup-function))))
 615                 (with-output-to-temp-buffer file-cache-completions-buffer
 616                   (display-completion-list
 617                    (completion-hilit-commonality completion-list
 618                                                  (length string))))))
 619           (setq file-cache-string (file-cache-file-name completion-string))
 620           (if (string= file-cache-string (minibuffer-contents))
 621               (minibuffer-message file-cache-sole-match-message)
 622             (delete-minibuffer-contents)
 623             (insert file-cache-string)
 624             (if file-cache-multiple-directory-message
 625                 (minibuffer-message file-cache-multiple-directory-message)))
 626           )))
 627
 628      ;; No match
 629      ((eq completion-string nil)
 630       (minibuffer-message file-cache-no-match-message)))))
 631
 632 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 633 ;; Completion functions
 634 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 635
 636 (defun file-cache-completion-setup-function  ()
 637   (with-current-buffer standard-output ;; i.e. file-cache-completions-buffer
 638     (use-local-map file-cache-completions-keymap)))
 639
 640 (defun file-cache-choose-completion (&optional event)
 641   "Choose a completion in the `*Completions*' buffer."
 642   (interactive (list last-nonmenu-event))
 643   (let ((completion-no-auto-exit t))
 644     (choose-completion event)
 645     (select-window (active-minibuffer-window))
 646     (file-cache-minibuffer-complete nil)))
 647
 648 (define-obsolete-function-alias 'file-cache-mouse-choose-completion
 649   'file-cache-choose-completion "23.2")
 650
 651 (defun file-cache-complete  ()
 652   "Complete the word at point, using the filecache."
 653   (interactive)
 654   (let ((start
 655     (save-excursion
 656       (skip-syntax-backward "^\"")
 657            (point))))
 658     (completion-in-region start (point) file-cache-alist)))
 659
 660 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 661 ;; Show parts of the cache
 662 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 663
 664 (defun file-cache-files-matching-internal (regexp)
 665   "Output a list of files whose names (not including directories)
 666 match REGEXP."
 667   (let ((results))
 668     (dolist (cache-element file-cache-alist)
 669       (and (string-match regexp (elt cache-element 0))
 670            (push (elt cache-element 0) results)))
 671     (nreverse results)))
 672
 673 (defun file-cache-files-matching (regexp)
 674   "Output a list of files whose names (not including directories)
 675 match REGEXP."
 676   (interactive "sFind files matching regexp: ")
 677   (let ((results
 678          (file-cache-files-matching-internal regexp))
 679         buf)
 680     (set-buffer
 681      (setq buf (get-buffer-create
 682                 "*File Cache Files Matching*")))
 683     (erase-buffer)
 684     (insert
 685      (mapconcat #'identity results "\n"))
 686     (goto-char (point-min))
 687     (display-buffer buf)))
 688
 689 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 690 ;; Debugging functions
 691 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 692
 693 (defun file-cache-debug-read-from-minibuffer (file)
 694   "Debugging function."
 695   (interactive
 696    (list (completing-read "File Cache: " file-cache-alist)))
 697   (message "%s" (assoc-string file file-cache-alist
 698                               file-cache-ignore-case)))
 699
 700 (defun file-cache-display  ()
 701   "Display the file cache."
 702   (interactive)
 703   (let ((buf "*File Cache Contents*"))
 704     (with-current-buffer
 705         (get-buffer-create buf)
 706       (erase-buffer)
 707       (dolist (item file-cache-alist)
 708         (insert (nth 1 item) (nth 0 item) "\n"))
 709       (pop-to-buffer buf))))
 710
 711 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 712 ;; Keybindings
 713 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 714
 715 (provide 'filecache)
 716
 717 ;;; filecache.el ends here