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618 lines
21 KiB
EmacsLisp
618 lines
21 KiB
EmacsLisp
;;; filecache.el --- Find files using a pre-loaded cache
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;;
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;; Author: Peter Breton <pbreton@cs.umb.edu>
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;; Created: Sun Nov 10 1996
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;; Keywords: convenience
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;; Time-stamp: <1998-04-29 22:38:56 pbreton>
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;;
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;; Copyright (C) 1996 Free Software Foundation, Inc.
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;
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;; The file-cache package is an attempt to make it easy to locate files
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;; by name, without having to remember exactly where they are located.
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;; This is very handy when working with source trees. You can also add
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;; frequently used files to the cache to create a hotlist effect.
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;; The cache can be used with any interactive command which takes a
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;; filename as an argument.
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;;
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;; It is worth noting that this package works best when most of the files
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;; in the cache have unique names, or (if they have the same name) exist in
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;; only a few directories. The worst case is many files all with
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;; the same name and in different directories, for example a big source tree
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;; with a Makefile in each directory. In such a case, you should probably
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;; use an alternate strategy to find the files.
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;;
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;; ADDING FILES TO THE CACHE:
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;;
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;; Use the following functions to add items to the file cache:
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;;
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;; * `file-cache-add-file': Adds a single file to the cache
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;;
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;; * `file-cache-add-file-list': Adds a list of files to the cache
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;;
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;; The following functions use the regular expressions in
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;; `file-cache-delete-regexps' to eliminate unwanted files:
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;;
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;; * `file-cache-add-directory': Adds the files in a directory to the
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;; cache. You can also specify a regular expression to match the files
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;; which should be added.
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;;
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;; * `file-cache-add-directory-list': Same as above, but acts on a list
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;; of directories. You can use `load-path', `exec-path' and the like.
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;;
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;; * `file-cache-add-directory-using-find': Uses the `find' command to
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;; add a directory tree to the cache.
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;;
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;; * `file-cache-add-directory-using-locate': Uses the `locate' command to
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;; add files matching a pattern to the cache.
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;;
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;; Use the function `file-cache-clear-cache' to remove all items from the
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;; cache. There are a number of `file-cache-delete' functions provided
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;; as well, but in general it is probably better to not worry too much
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;; about extra files in the cache.
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;;
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;; The most convenient way to initialize the cache is with an
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;; `eval-after-load' function, as noted in the ADDING FILES
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;; AUTOMATICALLY section.
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;;
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;; FINDING FILES USING THE CACHE:
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;;
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;; You can use the file-cache with any function that expects a filename as
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;; an argument. For example:
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;;
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;; 1) Invoke a function which expects a filename as an argument:
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;; M-x find-file
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;;
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;; 2) Begin typing a file name.
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;;
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;; 3) Invoke `file-cache-minibuffer-complete' (bound by default to
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;; C-TAB) to complete on the filename using the cache.
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;;
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;; 4) When you have found a unique completion, the minibuffer contents
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;; will change to the full name of that file.
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;;
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;; If there are a number of directories which contain the completion,
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;; invoking `file-cache-minibuffer-complete' repeatedly will cycle through
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;; them.
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;;
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;; 5) You can then edit the minibuffer contents, or press RETURN.
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;;
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;; It is much easier to simply try it than trying to explain it :)
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;;
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;;; ADDING FILES AUTOMATICALLY
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;;
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;; For maximum utility, you should probably define an `eval-after-load'
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;; form which loads your favorite files:
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;;
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;; (eval-after-load
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;; "filecache"
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;; '(progn
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;; (message "Loading file cache...")
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;; (file-cache-add-directory-using-find "~/projects")
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;; (file-cache-add-directory-list load-path)
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;; (file-cache-add-directory "~/")
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;; (file-cache-add-file-list (list "~/foo/bar" "~/baz/bar"))
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;; ))
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;;
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;; If you clear and reload the cache frequently, it is probably easiest
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;; to put your initializations in a function:
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;;
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;; (eval-after-load
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;; "filecache"
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;; '(my-file-cache-initialize))
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;;
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;; (defun my-file-cache-initialize ()
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;; (interactive)
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;; (message "Loading file cache...")
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;; (file-cache-add-directory-using-find "~/projects")
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;; (file-cache-add-directory-list load-path)
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;; (file-cache-add-directory "~/")
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;; (file-cache-add-file-list (list "~/foo/bar" "~/baz/bar"))
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;; ))
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;;
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;; Of course, you can still add files to the cache afterwards, via
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;; Lisp functions.
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;;
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;; RELATED WORK:
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;;
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;; This package is a distant relative of Noah Friedman's fff utilities.
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;; Our goal is pretty similar, but the implementation strategies are
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;; different.
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;;; Code:
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(defgroup file-cache nil
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"Find files using a pre-loaded cache."
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:group 'files
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:group 'convenience
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:prefix "file-cache-")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Customization Variables
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; User-modifiable variables
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(defcustom file-cache-filter-regexps
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(list "~$" "\\.o$" "\\.exe$" "\\.a$" "\\.elc$" ",v$" "\\.output$"
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"\\.$" "#$")
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"*List of regular expressions used as filters by the file cache.
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File names which match these expressions will not be added to the cache.
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Note that the functions `file-cache-add-file' and `file-cache-add-file-list'
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do not use this variable."
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:type '(repeat regexp)
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:group 'file-cache)
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(defcustom file-cache-find-command "find"
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"*External program used by `file-cache-add-directory-using-find'."
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:type 'string
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:group 'file-cache)
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(defcustom file-cache-locate-command "locate"
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"*External program used by `file-cache-add-directory-using-locate'."
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:type 'string
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:group 'file-cache)
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;; Minibuffer messages
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(defcustom file-cache-no-match-message " [File Cache: No match]"
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"Message to display when there is no completion."
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:type 'string
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:group 'file-cache)
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(defcustom file-cache-sole-match-message " [File Cache: sole completion]"
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"Message to display when there is only one completion."
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:type 'string
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:group 'file-cache)
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(defcustom file-cache-non-unique-message
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" [File Cache: complete but not unique]"
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"Message to display when there is a non-unique completion."
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:type 'string
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:group 'file-cache)
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(defvar file-cache-multiple-directory-message nil)
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;; Internal variables
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;; This should be named *Completions* because that's what the function
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;; switch-to-completions in simple.el expects
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(defcustom file-cache-completions-buffer "*Completions*"
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"Buffer to display completions when using the file cache."
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:type 'string
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:group 'file-cache)
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(defcustom file-cache-buffer "*File Cache*"
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"Buffer to hold the cache of file names."
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:type 'string
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:group 'file-cache)
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(defcustom file-cache-buffer-default-regexp "^.+$"
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"Regexp to match files in `file-cache-buffer'."
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:type 'regexp
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:group 'file-cache)
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(defvar file-cache-last-completion nil)
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(defvar file-cache-alist nil
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"Internal data structure to hold cache of file names.")
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(defvar file-cache-completions-keymap nil
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"Keymap for file cache completions buffer.")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Functions to add files to the cache
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun file-cache-add-directory (directory &optional regexp)
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"Add DIRECTORY to the file cache.
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If the optional REGEXP argument is non-nil, only files which match it will
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be added to the cache."
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(interactive "DAdd files from directory: ")
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;; Not an error, because otherwise we can't use load-paths that
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;; contain non-existent directories.
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(if (not (file-accessible-directory-p directory))
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(message "Directory %s does not exist" directory)
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(let* ((dir (expand-file-name directory))
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(dir-files (directory-files dir t regexp))
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)
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;; Filter out files we don't want to see
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(mapcar
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'(lambda (file)
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(mapcar
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'(lambda (regexp)
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(if (string-match regexp file)
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(setq dir-files (delq file dir-files))))
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file-cache-filter-regexps))
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dir-files)
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(file-cache-add-file-list dir-files))))
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(defun file-cache-add-directory-list (directory-list &optional regexp)
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"Add DIRECTORY-LIST (a list of directory names) to the file cache.
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If the optional REGEXP argument is non-nil, only files which match it
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will be added to the cache. Note that the REGEXP is applied to the files
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in each directory, not to the directory list itself."
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(interactive "XAdd files from directory list: ")
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(mapcar
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'(lambda (dir) (file-cache-add-directory dir regexp))
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directory-list))
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(defun file-cache-add-file-list (file-list)
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"Add FILE-LIST (a list of files names) to the file cache."
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(interactive "XFile List: ")
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(mapcar 'file-cache-add-file file-list))
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;; Workhorse function
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(defun file-cache-add-file (file)
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"Add FILE to the file cache."
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(interactive "fAdd File: ")
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(if (not (file-exists-p file))
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(message "File %s does not exist" file)
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(let* ((file-name (file-name-nondirectory file))
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(dir-name (file-name-directory file))
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(the-entry (assoc file-name file-cache-alist))
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)
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;; Does the entry exist already?
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(if the-entry
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(if (or (and (stringp (cdr the-entry))
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(string= dir-name (cdr the-entry)))
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(and (listp (cdr the-entry))
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(member dir-name (cdr the-entry))))
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nil
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(setcdr the-entry (append (list dir-name) (cdr the-entry)))
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)
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;; If not, add it to the cache
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(setq file-cache-alist
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(cons (cons file-name (list dir-name))
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file-cache-alist)))
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)))
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(defun file-cache-add-directory-using-find (directory)
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"Use the `find' command to add files to the file cache.
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Find is run in DIRECTORY."
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(interactive "DAdd files under directory: ")
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(let ((dir (expand-file-name directory)))
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(set-buffer (get-buffer-create file-cache-buffer))
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(erase-buffer)
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(call-process file-cache-find-command nil
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(get-buffer file-cache-buffer) nil
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dir "-name"
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(if (memq system-type
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(list 'windows-nt 'ms-dos)) "'*'" "*")
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"-print")
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(file-cache-add-from-file-cache-buffer)))
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(defun file-cache-add-directory-using-locate (string)
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"Use the `locate' command to add files to the file cache.
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STRING is passed as an argument to the locate command."
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(interactive "sAdd files using locate string: ")
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(set-buffer (get-buffer-create file-cache-buffer))
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(erase-buffer)
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(call-process file-cache-locate-command nil
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(get-buffer file-cache-buffer) nil
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string)
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(file-cache-add-from-file-cache-buffer))
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(defun file-cache-add-from-file-cache-buffer (&optional regexp)
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"Add any entries found in the file cache buffer.
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Each entry matches the regular expression `file-cache-buffer-default-regexp'
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or the optional REGEXP argument."
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(set-buffer file-cache-buffer)
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(mapcar
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(function (lambda (elt)
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(goto-char (point-min))
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(delete-matching-lines elt)))
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file-cache-filter-regexps)
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(goto-char (point-min))
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(let ((full-filename))
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(while (re-search-forward
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(or regexp file-cache-buffer-default-regexp)
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(point-max) t)
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(setq full-filename (buffer-substring-no-properties
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(match-beginning 0) (match-end 0)))
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(file-cache-add-file full-filename))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Functions to delete from the cache
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun file-cache-clear-cache ()
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"Clear the file cache."
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(interactive)
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(setq file-cache-alist nil))
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;; This clears *all* files with the given name
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(defun file-cache-delete-file (file)
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"Delete FILE from the file cache."
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(interactive
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(list (completing-read "Delete file from cache: " file-cache-alist)))
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(setq file-cache-alist
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(delq (assoc file file-cache-alist) file-cache-alist)))
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(defun file-cache-delete-file-list (file-list)
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"Delete FILE-LIST (a list of files) from the file cache."
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(interactive "XFile List: ")
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(mapcar 'file-cache-delete-file file-list))
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(defun file-cache-delete-file-regexp (regexp)
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"Delete files matching REGEXP from the file cache."
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(interactive "sRegexp: ")
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(let ((delete-list))
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(mapcar '(lambda (elt)
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(and (string-match regexp (car elt))
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(setq delete-list (cons (car elt) delete-list))))
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file-cache-alist)
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(file-cache-delete-file-list delete-list)
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(message "Deleted %d files from file cache" (length delete-list))))
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(defun file-cache-delete-directory (directory)
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"Delete DIRECTORY from the file cache."
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(interactive "DDelete directory from file cache: ")
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(let ((dir (expand-file-name directory))
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(result 0))
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(mapcar
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'(lambda (entry)
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(if (file-cache-do-delete-directory dir entry)
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(setq result (1+ result))))
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file-cache-alist)
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(if (zerop result)
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(error "No entries containing %s found in cache" directory)
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(message "Deleted %d entries" result))))
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(defun file-cache-do-delete-directory (dir entry)
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(let ((directory-list (cdr entry))
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(directory (file-cache-canonical-directory dir))
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)
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(and (member directory directory-list)
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(if (equal 1 (length directory-list))
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(setq file-cache-alist
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(delq entry file-cache-alist))
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(setcdr entry (delete directory directory-list)))
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)
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))
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(defun file-cache-delete-directory-list (directory-list)
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"Delete DIRECTORY-LIST (a list of directories) from the file cache."
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(interactive "XDirectory List: ")
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(mapcar 'file-cache-delete-directory directory-list))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Utility functions
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Returns the name of a directory for a file in the cache
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(defun file-cache-directory-name (file)
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(let* ((directory-list (cdr (assoc file file-cache-alist)))
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(len (length directory-list))
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(directory)
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(num)
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)
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(if (not (listp directory-list))
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(error "Unknown type in file-cache-alist for key %s" file))
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(cond
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;; Single element
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((eq 1 len)
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(setq directory (elt directory-list 0)))
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;; No elements
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((eq 0 len)
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(error "No directory found for key %s" file))
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;; Multiple elements
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(t
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(let* ((minibuffer-dir (file-name-directory (buffer-string)))
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(dir-list (member minibuffer-dir directory-list))
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)
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(setq directory
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;; If the directory is in the list, return the next element
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;; Otherwise, return the first element
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(if dir-list
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(or (elt directory-list
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(setq num (1+ (- len (length dir-list)))))
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(elt directory-list (setq num 0)))
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(elt directory-list (setq num 0))))
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)
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)
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)
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;; If there were multiple directories, set up a minibuffer message
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(setq file-cache-multiple-directory-message
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(and num (format " [%d of %d]" (1+ num) len)))
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directory))
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;; Returns the name of a file in the cache
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(defun file-cache-file-name (file)
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(let ((directory (file-cache-directory-name file)))
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(concat directory file)))
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;; Return a canonical directory for comparison purposes.
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;; Such a directory ends with a forward slash.
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(defun file-cache-canonical-directory (dir)
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(let ((directory dir))
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(if (not (char-equal ?/ (string-to-char (substring directory -1))))
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(concat directory "/")
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directory)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Minibuffer functions
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; The prefix argument works around a bug in the minibuffer completion.
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;; The completion function doesn't distinguish between the states:
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;;
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;; "Multiple completions of name" (eg, Makefile, Makefile.in)
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;; "Name available in multiple directories" (/tmp/Makefile, ~me/Makefile)
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;;
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;; The default is to do the former; a prefix arg forces the latter.
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;;;###autoload
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(defun file-cache-minibuffer-complete (arg)
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"Complete a filename in the minibuffer using a preloaded cache.
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Filecache does two kinds of substitution: it completes on names in
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the cache, and, once it has found a unique name, it cycles through
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the directories that the name is available in. With a prefix argument,
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the name is considered already unique; only the second substitution
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\(directories) is done."
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(interactive "P")
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(let*
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(
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(completion-ignore-case nil)
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(case-fold-search nil)
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(string (file-name-nondirectory (buffer-string)))
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(completion-string (try-completion string file-cache-alist))
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(completion-list)
|
|
(len)
|
|
(file-cache-string)
|
|
)
|
|
(cond
|
|
;; If it's the only match, replace the original contents
|
|
((or arg (eq completion-string t))
|
|
(setq file-cache-string (file-cache-file-name string))
|
|
(if (string= file-cache-string (buffer-string))
|
|
(file-cache-temp-minibuffer-message file-cache-sole-match-message)
|
|
(erase-buffer)
|
|
(insert-string file-cache-string)
|
|
(if file-cache-multiple-directory-message
|
|
(file-cache-temp-minibuffer-message
|
|
file-cache-multiple-directory-message))
|
|
))
|
|
|
|
;; If it's the longest match, insert it
|
|
((stringp completion-string)
|
|
;; If we've already inserted a unique string, see if the user
|
|
;; wants to use that one
|
|
(if (and (string= string completion-string)
|
|
(assoc string file-cache-alist))
|
|
(if (and (eq last-command this-command)
|
|
(string= file-cache-last-completion completion-string))
|
|
(progn
|
|
(erase-buffer)
|
|
(insert-string (file-cache-file-name completion-string))
|
|
(setq file-cache-last-completion nil)
|
|
)
|
|
(file-cache-temp-minibuffer-message file-cache-non-unique-message)
|
|
(setq file-cache-last-completion string)
|
|
)
|
|
(setq file-cache-last-completion string)
|
|
(setq completion-list (all-completions string file-cache-alist)
|
|
len (length completion-list))
|
|
(if (> len 1)
|
|
(progn
|
|
(goto-char (point-max))
|
|
(insert-string
|
|
(substring completion-string (length string)))
|
|
;; Add our own setup function to the Completions Buffer
|
|
(let ((completion-setup-hook
|
|
(reverse
|
|
(append (list 'file-cache-completion-setup-function)
|
|
completion-setup-hook)))
|
|
)
|
|
(with-output-to-temp-buffer file-cache-completions-buffer
|
|
(display-completion-list completion-list))
|
|
)
|
|
)
|
|
(setq file-cache-string (file-cache-file-name completion-string))
|
|
(if (string= file-cache-string (buffer-string))
|
|
(file-cache-temp-minibuffer-message
|
|
file-cache-sole-match-message)
|
|
(erase-buffer)
|
|
(insert-string file-cache-string)
|
|
(if file-cache-multiple-directory-message
|
|
(file-cache-temp-minibuffer-message
|
|
file-cache-multiple-directory-message)))
|
|
)))
|
|
|
|
;; No match
|
|
((eq completion-string nil)
|
|
(file-cache-temp-minibuffer-message file-cache-no-match-message))
|
|
)
|
|
))
|
|
|
|
;; Lifted from "complete.el"
|
|
(defun file-cache-temp-minibuffer-message (msg)
|
|
"A Lisp version of `temp_minibuffer_message' from minibuf.c."
|
|
(let ((savemax (point-max)))
|
|
(save-excursion
|
|
(goto-char (point-max))
|
|
(insert msg))
|
|
(let ((inhibit-quit t))
|
|
(sit-for 2)
|
|
(delete-region savemax (point-max))
|
|
(if quit-flag
|
|
(setq quit-flag nil
|
|
unread-command-events (list 7))))))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Completion functions
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(defun file-cache-completion-setup-function ()
|
|
(set-buffer file-cache-completions-buffer)
|
|
|
|
(if file-cache-completions-keymap
|
|
nil
|
|
(setq file-cache-completions-keymap
|
|
(copy-keymap completion-list-mode-map))
|
|
(define-key file-cache-completions-keymap [mouse-2]
|
|
'file-cache-mouse-choose-completion)
|
|
(define-key file-cache-completions-keymap "\C-m"
|
|
'file-cache-choose-completion))
|
|
|
|
(use-local-map file-cache-completions-keymap)
|
|
)
|
|
|
|
(defun file-cache-choose-completion ()
|
|
"Choose a completion in the `*Completions*' buffer."
|
|
(interactive)
|
|
(let ((completion-no-auto-exit t))
|
|
(choose-completion)
|
|
(select-window (active-minibuffer-window))
|
|
(file-cache-minibuffer-complete nil)
|
|
)
|
|
)
|
|
|
|
(defun file-cache-mouse-choose-completion (event)
|
|
"Choose a completion with the mouse."
|
|
(interactive "e")
|
|
(let ((completion-no-auto-exit t))
|
|
(mouse-choose-completion event)
|
|
(select-window (active-minibuffer-window))
|
|
(file-cache-minibuffer-complete nil)
|
|
)
|
|
)
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Debugging functions
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(defun file-cache-debug-read-from-minibuffer (file)
|
|
"Debugging function."
|
|
(interactive
|
|
(list (completing-read "File Cache: " file-cache-alist)))
|
|
(message "%s" (assoc file file-cache-alist))
|
|
)
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Keybindings
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
;;;###autoload (define-key minibuffer-local-completion-map [C-tab] 'file-cache-minibuffer-complete)
|
|
;;;###autoload (define-key minibuffer-local-map [C-tab] 'file-cache-minibuffer-complete)
|
|
;;;###autoload (define-key minibuffer-local-must-match-map [C-tab] 'file-cache-minibuffer-complete)
|
|
|
|
(provide 'filecache)
|
|
|
|
;;; filecache.el ends here
|