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* bookmark.el (bookmark-bmenu-toggle-filenames): Doc fixes. * comint.el (comint-prompt-read-only): * custom.el (defcustom): * hi-lock.el (hi-lock-mode): * ibuffer.el (ibuffer-formats): * ielm.el (ielm-prompt-read-only): * novice.el (disable-command): * saveplace.el (toggle-save-place): * speedbar.el (speedbar-supported-extension-expressions): * startup.el (auto-save-list-file-prefix, init-file-user) (after-init-hook, inhibit-startup-echo-area-message): * strokes.el (strokes-help): * time-stamp.el (time-stamp): * calendar/calendar.el (calendar, diary-file): * calendar/diary-lib.el (diary-mail-entries, diary) (diary-list-entries-hook): * calendar/holidays.el (holidays, calendar-holidays): * calendar/lunar.el (lunar-phases): * calendar/solar.el (sunrise-sunset): * emulation/edt.el (edt-load-keys): * emulation/viper.el (viper-mode): * eshell/em-alias.el (eshell-command-aliases-list): * eshell/esh-util.el (eshell-convert-numeric-arguments): * international/ogonek.el (ogonek-information): * net/tramp-cmds.el (tramp-bug): * net/quickurl.el (quickurl-reread-hook-postfix): * play/decipher.el (decipher-font-lock-keywords): * progmodes/cc-styles.el (c-set-style): * progmodes/idlw-shell.el (idlwave-shell-prompt-pattern): * progmodes/inf-lisp.el (inferior-lisp-prompt): * progmodes/octave-mod.el (octave-mode): * progmodes/sql.el (sql-mode, sql-interactive-mode, sql-password): * progmodes/verilog-mode.el (verilog-read-defines): * textmodes/two-column.el (2C-mode): Likewise.
698 lines
26 KiB
EmacsLisp
698 lines
26 KiB
EmacsLisp
;;; locate.el --- interface to the locate command
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;; Copyright (C) 1996, 1998, 2001-2012 Free Software Foundation, Inc.
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;; Author: Peter Breton <pbreton@cs.umb.edu>
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;; Keywords: unix files
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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 3 of the License, or
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;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Search a database of files and use dired commands on the result.
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;;
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;; Locate.el provides an interface to a program which searches a
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;; database of file names. By default, this program is the GNU locate
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;; command, but it could also be the BSD-style find command, or even a
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;; user specified command.
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;;
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;; To use the BSD-style "fast find", or any other shell command of the
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;; form
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;;
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;; SHELLPROGRAM Name-to-find
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;;
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;; set the variable `locate-command' in your init file.
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;;
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;; To use a more complicated expression, create a function which
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;; takes a string (the name to find) as input and returns a list.
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;; The first element should be the command to be executed, the remaining
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;; elements should be the arguments (including the name to find). Then put
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;;
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;; (setq locate-make-command-line 'my-locate-command-line)
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;;
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;; in your .emacs, using the name of your function in place of
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;; my-locate-command-line.
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;;
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;; You should make sure that whichever command you use works correctly
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;; from a shell prompt. GNU locate and BSD find expect the file databases
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;; to either be in standard places or located via environment variables.
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;; If the latter, make sure these environment variables are set in
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;; your emacs process.
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;;
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;; Locate-mode assumes that each line output from the locate-command
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;; consists exactly of a file name, possibly preceded or trailed by
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;; whitespace. If your file database has other information on the line (for
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;; example, the file size), you will need to redefine the function
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;; `locate-get-file-positions' to return a list consisting of the first
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;; character in the file name and the last character in the file name.
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;;
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;; To use locate-mode, simply type M-x locate and then the string
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;; you wish to find. You can use almost all of the dired commands in
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;; the resulting *Locate* buffer. It is worth noting that your commands
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;; do not, of course, affect the file database. For example, if you
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;; compress a file in the locate buffer, the actual file will be
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;; compressed, but the entry in the file database will not be
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;; affected. Consequently, the database and the filesystem will be out
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;; of sync until the next time the database is updated.
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;;
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;; The command `locate-with-filter' keeps only lines matching a
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;; regular expression; this is often useful to constrain a big search.
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;;
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;;;;; Building a database of files ;;;;;;;;;
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;;
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;; You can create a simple files database with a port of the Unix find command
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;; and one of the various Windows NT various scheduling utilities,
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;; for example the AT command from the NT Resource Kit, WinCron which is
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;; included with Microsoft FrontPage, or the shareware NTCron program.
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;;
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;; To set up a function which searches the files database, do something
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;; like this:
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;;
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;; (defvar locate-fcodes-file "c:/users/peter/fcodes")
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;; (defvar locate-make-command-line 'nt-locate-make-command-line)
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;;
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;; (defun nt-locate-make-command-line (arg)
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;; (list "grep" "-i" arg locate-fcodes-file))
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;;
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;;;;;;;; ADVICE For dired-make-relative: ;;;;;;;;;
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;;
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;; For certain dired commands to work right, you should also include the
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;; following in your _emacs/.emacs:
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;;
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;; (defadvice dired-make-relative (before set-no-error activate)
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;; "For locate mode and Windows, don't return errors"
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;; (if (and (eq major-mode 'locate-mode)
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;; (memq system-type '(windows-nt ms-dos)))
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;; (ad-set-arg 2 t)
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;; ))
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;;
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;; Otherwise, `dired-make-relative' will give error messages like
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;; "FILENAME: not in directory tree growing at /"
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;;; Code:
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(require 'dired)
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;; Variables
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(defvar locate-current-filter nil)
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(defvar locate-local-filter nil)
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(defvar locate-local-search nil)
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(defvar locate-local-prompt nil)
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(defgroup locate nil
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"Interface to the locate command."
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:prefix "locate-"
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:group 'external)
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(defcustom locate-command "locate"
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"Executable program for searching a database of files.
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The Emacs commands `locate' and `locate-with-filter' use this.
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The value should be a program that can be called from a shell
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with one argument, SEARCH-STRING. The program determines which
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database it searches. The output of the program should consist
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of those file names in the database that match SEARCH-STRING,
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listed one per line, possibly with leading or trailing
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whitespace. If the output is in another form, you may have to
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redefine the function `locate-get-file-positions'.
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The program may interpret SEARCH-STRING as a literal string, a
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shell pattern or a regular expression. The exact rules of what
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constitutes a match may also depend on the program.
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The standard value of this variable is \"locate\".
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This program normally searches a database of all files on your
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system, or of all files that you have access to. Consult the
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documentation of that program for the details about how it determines
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which file names match SEARCH-STRING. (Those details vary highly with
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the version.)"
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:type 'string
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:group 'locate)
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(defcustom locate-post-command-hook nil
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"List of hook functions run after `locate' (see `run-hooks')."
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:type 'hook
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:group 'locate)
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(defvar locate-history-list nil
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"The history list used by the \\[locate] command.")
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(defvar locate-grep-history-list nil
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"The history list used by the \\[locate-with-filter] command.")
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(defcustom locate-make-command-line 'locate-default-make-command-line
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"Function used to create the locate command line.
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The Emacs commands `locate' and `locate-with-filter' use this.
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This function should take one argument, a string (the name to find)
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and return a list of strings. The first element of the list should be
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the name of a command to be executed by a shell, the remaining elements
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should be the arguments to that command (including the name to find)."
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:type 'function
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:group 'locate)
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(defcustom locate-buffer-name "*Locate*"
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"Name of the buffer to show results from the \\[locate] command."
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:type 'string
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:group 'locate)
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(defcustom locate-fcodes-file nil
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"File name for the database of file names used by `locate'.
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If non-nil, `locate' uses this name in the header of the `*Locate*'
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buffer. If nil, it mentions no file name in that header.
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Just setting this variable does not actually change the database
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that `locate' searches. The executive program that the Emacs
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function `locate' uses, as given by the variables `locate-command'
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or `locate-make-command-line', determines the database."
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:type '(choice (const :tag "None" nil) file)
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:group 'locate)
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(defcustom locate-header-face nil
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"Face used to highlight the locate header."
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:type '(choice (const :tag "None" nil) face)
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:group 'locate)
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;;;###autoload
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(defcustom locate-ls-subdir-switches (purecopy "-al")
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"`ls' switches for inserting subdirectories in `*Locate*' buffers.
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This should contain the \"-l\" switch, but not the \"-F\" or \"-b\" switches."
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:type 'string
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:group 'locate
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:version "22.1")
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(defcustom locate-update-when-revert nil
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"This option affects how the *Locate* buffer gets reverted.
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If non-nil, offer to update the locate database when reverting that buffer.
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\(Normally, you need to have root privileges for this to work. See the
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option `locate-update-path'.)
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If nil, reverting does not update the locate database."
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:type 'boolean
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:group 'locate
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:version "22.1")
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(defcustom locate-update-command "updatedb"
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"The executable program used to update the locate database."
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:type 'string
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:group 'locate)
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(defcustom locate-update-path "/"
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"The default directory from where `locate-update-command' is called.
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Usually, root permissions are required to run that command. This
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can be achieved by setting this option to \"/su::\" or \"/sudo::\"
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\(if you have the appropriate authority). If your current user
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permissions are sufficient to run the command, you can set this
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option to \"/\"."
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:type 'string
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:group 'locate
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:version "22.1")
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(defcustom locate-prompt-for-command nil
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"If non-nil, the `locate' command prompts for a command to run.
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Otherwise, that behavior is invoked via a prefix argument.
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Setting this option non-nil actually inverts the meaning of a prefix arg;
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that is, with a prefix arg, you get the default behavior."
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:group 'locate
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:type 'boolean)
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(defcustom locate-mode-hook nil
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"List of hook functions run by `locate-mode' (see `run-mode-hooks')."
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:type 'hook
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:group 'locate)
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;; Functions
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(defun locate-default-make-command-line (search-string)
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(list locate-command search-string))
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(defun locate-word-at-point ()
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(let ((pt (point)))
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(buffer-substring-no-properties
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(save-excursion
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(skip-chars-backward "-a-zA-Z0-9.")
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(point))
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(save-excursion
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(skip-chars-forward "-a-zA-Z0-9.")
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(skip-chars-backward "." pt)
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(point)))))
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;; Function for use in interactive declarations.
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(defun locate-prompt-for-search-string ()
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(if (or (and current-prefix-arg
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(not locate-prompt-for-command))
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(and (not current-prefix-arg) locate-prompt-for-command))
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(let ((locate-cmd (funcall locate-make-command-line "")))
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(read-from-minibuffer
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"Run locate (like this): "
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(cons
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(concat (car locate-cmd) " "
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(mapconcat 'identity (cdr locate-cmd) " "))
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(+ 2 (length (car locate-cmd))))
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nil nil 'locate-history-list))
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(let* ((default (locate-word-at-point))
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(input
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(read-from-minibuffer
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(if (> (length default) 0)
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(format "Locate (default %s): " default)
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(format "Locate: "))
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nil nil nil 'locate-history-list default t)))
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(and (equal input "") default
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(setq input default))
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input)))
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;;;###autoload
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(defun locate (search-string &optional filter arg)
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"Run the program `locate', putting results in `*Locate*' buffer.
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Pass it SEARCH-STRING as argument. Interactively, prompt for SEARCH-STRING.
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With prefix arg ARG, prompt for the exact shell command to run instead.
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This program searches for those file names in a database that match
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SEARCH-STRING and normally outputs all matching absolute file names,
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one per line. The database normally consists of all files on your
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system, or of all files that you have access to. Consult the
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documentation of the program for the details about how it determines
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which file names match SEARCH-STRING. (Those details vary highly with
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the version.)
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You can specify another program for this command to run by customizing
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the variables `locate-command' or `locate-make-command-line'.
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The main use of FILTER is to implement `locate-with-filter'. See
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the docstring of that function for its meaning.
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After preparing the results buffer, this runs `dired-mode-hook' and
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then `locate-post-command-hook'."
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(interactive
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(list
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(locate-prompt-for-search-string)
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nil
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current-prefix-arg))
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(if (equal search-string "")
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(error "Please specify a filename to search for"))
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(let* ((locate-cmd-list (funcall locate-make-command-line search-string))
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(locate-cmd (car locate-cmd-list))
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(locate-cmd-args (cdr locate-cmd-list))
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(run-locate-command
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(or (and arg (not locate-prompt-for-command))
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(and (not arg) locate-prompt-for-command))))
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;; Find the Locate buffer
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(save-window-excursion
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(set-buffer (get-buffer-create locate-buffer-name))
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(locate-mode)
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(let ((inhibit-read-only t)
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(buffer-undo-list t))
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(erase-buffer)
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(setq locate-current-filter filter)
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(set (make-local-variable 'locate-local-search) search-string)
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(set (make-local-variable 'locate-local-filter) filter)
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(set (make-local-variable 'locate-local-prompt) run-locate-command)
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(if run-locate-command
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(shell-command search-string locate-buffer-name)
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(apply 'call-process locate-cmd nil t nil locate-cmd-args))
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(and filter
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(locate-filter-output filter))
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(locate-do-setup search-string)))
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(and (not (string-equal (buffer-name) locate-buffer-name))
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(pop-to-buffer locate-buffer-name))
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(run-hooks 'dired-mode-hook)
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(dired-next-line 3) ;move to first matching file.
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(run-hooks 'locate-post-command-hook)))
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;;;###autoload
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(defun locate-with-filter (search-string filter &optional arg)
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"Run the executable program `locate' with a filter.
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This function is similar to the function `locate', which see.
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The difference is that, when invoked interactively, the present function
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prompts for both SEARCH-STRING and FILTER. It passes SEARCH-STRING
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to the locate executable program. It produces a `*Locate*' buffer
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that lists only those lines in the output of the locate program that
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contain a match for the regular expression FILTER; this is often useful
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to constrain a big search.
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ARG is the interactive prefix arg, which has the same effect as in `locate'.
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When called from Lisp, this function is identical with `locate',
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except that FILTER is not optional."
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(interactive
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(list
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(locate-prompt-for-search-string)
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(read-from-minibuffer "Filter: " nil nil
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nil 'locate-grep-history-list)
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current-prefix-arg))
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(locate search-string filter arg))
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(defun locate-filter-output (filter)
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"Filter output from the locate command."
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(goto-char (point-min))
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(keep-lines filter))
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(defvar locate-mode-map
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(let ((map (copy-keymap dired-mode-map)))
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;; Undefine Useless Dired Menu bars
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(define-key map [menu-bar Dired] 'undefined)
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(define-key map [menu-bar subdir] 'undefined)
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(define-key map [menu-bar mark executables] 'undefined)
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(define-key map [menu-bar mark directory] 'undefined)
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(define-key map [menu-bar mark directories] 'undefined)
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(define-key map [menu-bar mark symlinks] 'undefined)
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(define-key map [M-mouse-2] 'locate-mouse-view-file)
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(define-key map "\C-c\C-t" 'locate-tags)
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(define-key map "l" 'locate-do-redisplay)
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(define-key map "U" 'dired-unmark-all-files)
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(define-key map "V" 'locate-find-directory)
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map)
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"Local keymap for Locate mode buffers.")
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;; This variable is used to indent the lines and then to search for
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;; the file name
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(defconst locate-filename-indentation 4
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"The amount of indentation for each file.")
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(defun locate-get-file-positions ()
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"Return list of start and end of the file name on the current line.
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This is a list of two buffer positions.
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You should only call this function on lines that contain a file name
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listed by the locate program. Inside inserted subdirectories, or if
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there is no file name on the current line, the return value is
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meaningless. You can check whether the current line contains a file
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listed by the locate program, using the function
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`locate-main-listing-line-p'."
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(list (+ locate-filename-indentation
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(line-beginning-position))
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;; Assume names end at the end of the line.
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(line-end-position)))
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;; From SQL-mode
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(defun locate-current-line-number ()
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"Return the current line number, as an integer."
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(+ (count-lines (point-min) (point))
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(if (eq (current-column) 0)
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1
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0)))
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;; You should only call this function on lines that contain a file name
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;; listed by the locate program. Inside inserted subdirectories, or if
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;; there is no file name on the current line, the return value is
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;; meaningless. You can check whether the current line contains a file
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;; listed by the locate program, using the function
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;; `locate-main-listing-line-p'.
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(defun locate-get-filename ()
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(let ((pos (locate-get-file-positions))
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(lineno (locate-current-line-number)))
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(and (not (eq lineno 1))
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(not (eq lineno 2))
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(buffer-substring (elt pos 0) (elt pos 1)))))
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(defun locate-main-listing-line-p ()
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"Return t if current line contains a file name listed by locate.
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This function returns nil if the current line either contains no
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file name or is inside a subdirectory."
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(save-excursion
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(forward-line 0)
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(looking-at (concat "."
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(make-string (1- locate-filename-indentation) ?\s)
|
||
"\\(/\\|[A-Za-z]:\\)"))))
|
||
|
||
(defun locate-mouse-view-file (event)
|
||
"In Locate mode, view a file, using the mouse."
|
||
(interactive "@e")
|
||
(save-excursion
|
||
(goto-char (posn-point (event-start event)))
|
||
(if (locate-main-listing-line-p)
|
||
(view-file (locate-get-filename))
|
||
(message "This command only works inside main listing."))))
|
||
|
||
;; Define a mode for locate
|
||
;; Default directory is set to "/" so that dired commands, which
|
||
;; expect to be in a tree, will work properly
|
||
(defun locate-mode ()
|
||
"Major mode for the `*Locate*' buffer made by \\[locate].
|
||
\\<locate-mode-map>\
|
||
In that buffer, you can use almost all the usual dired bindings.
|
||
\\[locate-find-directory] visits the directory of the file on the current line.
|
||
This function runs `locate-mode-hook' before returning.
|
||
|
||
Operating on listed files works, but does not always
|
||
automatically update the buffer as in ordinary Dired.
|
||
This is true both for the main listing and for subdirectories.
|
||
Reverting the buffer using \\[revert-buffer] deletes all subdirectories.
|
||
Specific `locate-mode' commands, such as \\[locate-find-directory],
|
||
do not work in subdirectories.
|
||
|
||
\\{locate-mode-map}"
|
||
;; Not to be called interactively.
|
||
(kill-all-local-variables)
|
||
;; Avoid clobbering this variable
|
||
(make-local-variable 'dired-subdir-alist)
|
||
(use-local-map locate-mode-map)
|
||
(setq major-mode 'locate-mode
|
||
mode-name "Locate"
|
||
default-directory "/"
|
||
buffer-read-only t
|
||
selective-display t)
|
||
(dired-alist-add-1 default-directory (point-min-marker))
|
||
(set (make-local-variable 'dired-directory) "/")
|
||
(set (make-local-variable 'dired-subdir-switches) locate-ls-subdir-switches)
|
||
(setq dired-switches-alist nil)
|
||
(make-local-variable 'directory-listing-before-filename-regexp)
|
||
;; This should support both Unix and Windoze style names
|
||
(setq directory-listing-before-filename-regexp
|
||
(concat "^.\\("
|
||
(make-string (1- locate-filename-indentation) ?\s)
|
||
"\\)\\|"
|
||
(default-value 'directory-listing-before-filename-regexp)))
|
||
(make-local-variable 'dired-actual-switches)
|
||
(setq dired-actual-switches "")
|
||
(make-local-variable 'dired-permission-flags-regexp)
|
||
(setq dired-permission-flags-regexp
|
||
(concat "^.\\("
|
||
(make-string (1- locate-filename-indentation) ?\s)
|
||
"\\)\\|"
|
||
(default-value 'dired-permission-flags-regexp)))
|
||
(make-local-variable 'revert-buffer-function)
|
||
(setq revert-buffer-function 'locate-update)
|
||
(set (make-local-variable 'page-delimiter) "\n\n")
|
||
(run-mode-hooks 'locate-mode-hook))
|
||
|
||
(defun locate-do-setup (search-string)
|
||
(goto-char (point-min))
|
||
(save-excursion
|
||
|
||
;; Nothing returned from locate command?
|
||
(and (eobp)
|
||
(progn
|
||
(kill-buffer locate-buffer-name)
|
||
(if locate-current-filter
|
||
(error "Locate: no match for %s in database using filter %s"
|
||
search-string locate-current-filter)
|
||
(error "Locate: no match for %s in database" search-string))))
|
||
|
||
(locate-insert-header search-string)
|
||
|
||
(while (not (eobp))
|
||
(insert-char ?\s locate-filename-indentation t)
|
||
(locate-set-properties)
|
||
(forward-line 1)))
|
||
(goto-char (point-min)))
|
||
|
||
(defun locate-set-properties ()
|
||
(save-excursion
|
||
(let ((pos (locate-get-file-positions)))
|
||
(dired-insert-set-properties (elt pos 0) (elt pos 1)))))
|
||
|
||
(defun locate-insert-header (search-string)
|
||
;; There needs to be a space before `Matches, because otherwise,
|
||
;; `*!" would erase the `M'. We can not use two spaces, or the line
|
||
;; would mistakenly fit `dired-subdir-regexp'.
|
||
(let ((locate-format-string " /:\n Matches for %s")
|
||
(locate-regexp-match
|
||
(concat " *Matches for \\(" (regexp-quote search-string) "\\)"))
|
||
(locate-format-args (list search-string))
|
||
)
|
||
|
||
(and locate-fcodes-file
|
||
(setq locate-format-string
|
||
(concat locate-format-string " in %s")
|
||
locate-regexp-match
|
||
(concat locate-regexp-match
|
||
" in \\("
|
||
(regexp-quote locate-fcodes-file)
|
||
"\\)")
|
||
locate-format-args
|
||
(append (list locate-fcodes-file) locate-format-args)))
|
||
|
||
(and locate-current-filter
|
||
(setq locate-format-string
|
||
(concat locate-format-string " using filter %s")
|
||
locate-regexp-match
|
||
(concat locate-regexp-match
|
||
" using filter "
|
||
"\\("
|
||
(regexp-quote locate-current-filter)
|
||
"\\)")
|
||
locate-format-args
|
||
(append (list locate-current-filter) locate-format-args)))
|
||
|
||
(setq locate-format-string
|
||
(concat locate-format-string ":\n\n")
|
||
locate-regexp-match
|
||
(concat locate-regexp-match ":\n"))
|
||
|
||
(insert (apply 'format locate-format-string (reverse locate-format-args)))
|
||
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(forward-line 1)
|
||
(if (not (looking-at locate-regexp-match))
|
||
nil
|
||
(add-text-properties (match-beginning 1) (match-end 1)
|
||
(list 'face locate-header-face))
|
||
(and (match-beginning 2)
|
||
(add-text-properties (match-beginning 2) (match-end 2)
|
||
(list 'face locate-header-face)))
|
||
(and (match-beginning 3)
|
||
(add-text-properties (match-beginning 3) (match-end 3)
|
||
(list 'face locate-header-face)))
|
||
))))
|
||
|
||
(defun locate-tags ()
|
||
"Visit a tags table in `*Locate*' mode."
|
||
(interactive)
|
||
(if (locate-main-listing-line-p)
|
||
(let ((tags-table (locate-get-filename)))
|
||
(and (y-or-n-p (format "Visit tags table %s? " tags-table))
|
||
(visit-tags-table tags-table)))
|
||
(message "This command only works inside main listing.")))
|
||
|
||
;; From Stephen Eglen <stephen@cns.ed.ac.uk>
|
||
(defun locate-update (_ignore1 _ignore2)
|
||
"Revert the *Locate* buffer.
|
||
If `locate-update-when-revert' is non-nil, offer to update the
|
||
locate database using the shell command in `locate-update-command'."
|
||
(let ((locate-buffer-name (buffer-name))
|
||
(locate-prompt-for-command locate-local-prompt))
|
||
(and locate-update-when-revert
|
||
(yes-or-no-p "Update locate database (may take a few seconds)? ")
|
||
;; `expand-file-name' is used in order to autoload Tramp if
|
||
;; necessary. It cannot be loaded when `default-directory'
|
||
;; is remote.
|
||
(let ((default-directory (expand-file-name locate-update-path)))
|
||
(shell-command locate-update-command)))
|
||
(locate locate-local-search locate-local-filter)))
|
||
|
||
;;; Modified three functions from `dired.el':
|
||
;;; dired-find-directory,
|
||
;;; dired-find-directory-other-window
|
||
;;; dired-get-filename
|
||
|
||
(defun locate-find-directory ()
|
||
"Visit the directory of the file mentioned on this line."
|
||
(interactive)
|
||
(if (locate-main-listing-line-p)
|
||
(let ((directory-name (locate-get-dirname)))
|
||
(if (file-directory-p directory-name)
|
||
(find-file directory-name)
|
||
(if (file-symlink-p directory-name)
|
||
(error "Directory is a symlink to a nonexistent target")
|
||
(error "Directory no longer exists; run `updatedb' to update database"))))
|
||
(message "This command only works inside main listing.")))
|
||
|
||
(defun locate-find-directory-other-window ()
|
||
"Visit the directory of the file named on this line in other window."
|
||
(interactive)
|
||
(if (locate-main-listing-line-p)
|
||
(find-file-other-window (locate-get-dirname))
|
||
(message "This command only works inside main listing.")))
|
||
|
||
;; You should only call this function on lines that contain a file name
|
||
;; listed by the locate program. Inside inserted subdirectories, or if
|
||
;; there is no file name on the current line, the return value is
|
||
;; meaningless. You can check whether the current line contains a file
|
||
;; listed by the locate program, using the function
|
||
;; `locate-main-listing-line-p'.
|
||
(defun locate-get-dirname ()
|
||
"Return the directory name of the file mentioned on this line."
|
||
(let (file (filepos (locate-get-file-positions)))
|
||
(if (setq file (buffer-substring (nth 0 filepos) (nth 1 filepos)))
|
||
(progn
|
||
;; Get rid of the mouse-face property that file names have.
|
||
(set-text-properties 0 (length file) nil file)
|
||
(setq file (file-name-directory file))
|
||
;; Unquote names quoted by ls or by dired-insert-directory.
|
||
;; Using read to unquote is much faster than substituting
|
||
;; \007 (4 chars) -> ^G (1 char) etc. in a lisp loop.
|
||
(setq file
|
||
(read
|
||
(concat "\""
|
||
;; some ls -b don't escape quotes, argh!
|
||
;; This is not needed for GNU ls, though.
|
||
(or (dired-string-replace-match
|
||
"\\([^\\]\\|\\`\\)\"" file "\\1\\\\\"" nil t)
|
||
file)
|
||
"\"")))))
|
||
(and file buffer-file-coding-system
|
||
(not file-name-coding-system)
|
||
(setq file (encode-coding-string file buffer-file-coding-system)))
|
||
file))
|
||
|
||
;; Only for GNU locate
|
||
(defun locate-in-alternate-database (search-string database)
|
||
"Run the GNU locate program, using an alternate database.
|
||
|
||
This command only works if you use GNU locate. It does not work
|
||
properly if `locate-prompt-for-command' is set to t. In that
|
||
case, you can just run the regular `locate' command and specify
|
||
the database on the command line."
|
||
(interactive
|
||
(list
|
||
(progn
|
||
;; (require 'locate)
|
||
(read-from-minibuffer "Locate: " nil nil
|
||
nil 'locate-history-list))
|
||
(read-file-name "Locate using Database: " )
|
||
))
|
||
(or (file-exists-p database)
|
||
(error "Database file %s does not exist" database))
|
||
(let ((locate-make-command-line
|
||
(function (lambda (string)
|
||
(cons locate-command
|
||
(list (concat "--database="
|
||
(expand-file-name database))
|
||
string))))))
|
||
(locate search-string)))
|
||
|
||
(defun locate-do-redisplay (&optional arg test-for-subdir)
|
||
"Like `dired-do-redisplay', but adapted for `*Locate*' buffers."
|
||
(interactive "P\np")
|
||
(if (string= (dired-current-directory) "/")
|
||
(message "This command only works in subdirectories.")
|
||
(let ((dired-actual-switches locate-ls-subdir-switches))
|
||
(dired-do-redisplay arg test-for-subdir))))
|
||
|
||
(provide 'locate)
|
||
|
||
;;; locate.el ends here
|