;;; jka-compr.el --- reading/writing/loading compressed files
-;; Copyright (C) 1993, 1994, 1995, 1997, 1999, 2000, 2003 Free Software Foundation, Inc.
+;; Copyright (C) 1993, 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003,
+;; 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
;; Author: jka@ece.cmu.edu (Jay K. Adams)
;; Maintainer: FSF
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
+;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; The default value of this variable allows jka-compr to work with
;; Unix compress and gzip.
;;
-;; If you are concerned about the stderr output of gzip and other
-;; compression/decompression programs showing up in your buffers, you
-;; should set the discard-error flag in the compression-info-list.
-;; This will cause the stderr of all programs to be discarded.
-;; However, it also causes emacs to call compression/uncompression
-;; programs through a shell (which is specified by jka-compr-shell).
-;; This may be a drag if, on your system, starting up a shell is
-;; slow.
-;;
;; If you don't want messages about compressing and decompressing
-;; to show up in the echo area, you can set the compress-name and
-;; decompress-name fields of the jka-compr-compression-info-list to
+;; to show up in the echo area, you can set the compress-msg and
+;; decompress-msg fields of the jka-compr-compression-info-list to
;; nil.
;;; Code:
-(defgroup compression nil
- "Data compression utilities"
- :group 'data)
-
-(defgroup jka-compr nil
- "jka-compr customization"
- :group 'compression)
-
+(require 'jka-cmpr-hook)
(defcustom jka-compr-shell "sh"
"*Shell to be used for calling compression programs.
-The value of this variable only matters if you want to discard the
-stderr of a compression/decompression program (see the documentation
-for `jka-compr-compression-info-list')."
+NOTE: Not used in MS-DOS and Windows systems."
:type 'string
:group 'jka-compr)
(defvar jka-compr-use-shell
(not (memq system-type '(ms-dos windows-nt))))
-;;; I have this defined so that .Z files are assumed to be in unix
-;;; compress format; and .gz files, in gzip format, and .bz2 files in bzip fmt.
-(defcustom jka-compr-compression-info-list
- ;;[regexp
- ;; compr-message compr-prog compr-args
- ;; uncomp-message uncomp-prog uncomp-args
- ;; can-append auto-mode-flag strip-extension-flag file-magic-bytes]
- '(["\\.Z\\(~\\|\\.~[0-9]+~\\)?\\'"
- "compressing" "compress" ("-c")
- "uncompressing" "uncompress" ("-c")
- nil t "\037\235"]
- ;; Formerly, these had an additional arg "-c", but that fails with
- ;; "Version 0.1pl2, 29-Aug-97." (RedHat 5.1 GNU/Linux) and
- ;; "Version 0.9.0b, 9-Sept-98".
- ["\\.bz2\\'"
- "bzip2ing" "bzip2" nil
- "bunzip2ing" "bzip2" ("-d")
- nil t "BZh"]
- ["\\.tgz\\'"
- "zipping" "gzip" ("-c" "-q")
- "unzipping" "gzip" ("-c" "-q" "-d")
- t nil "\037\213"]
- ["\\.g?z\\(~\\|\\.~[0-9]+~\\)?\\'"
- "zipping" "gzip" ("-c" "-q")
- "unzipping" "gzip" ("-c" "-q" "-d")
- t t "\037\213"])
-
- "List of vectors that describe available compression techniques.
-Each element, which describes a compression technique, is a vector of
-the form [REGEXP COMPRESS-MSG COMPRESS-PROGRAM COMPRESS-ARGS
-UNCOMPRESS-MSG UNCOMPRESS-PROGRAM UNCOMPRESS-ARGS
-APPEND-FLAG STRIP-EXTENSION-FLAG FILE-MAGIC-CHARS], where:
-
- regexp is a regexp that matches filenames that are
- compressed with this format
-
- compress-msg is the message to issue to the user when doing this
- type of compression (nil means no message)
-
- compress-program is a program that performs this compression
-
- compress-args is a list of args to pass to the compress program
-
- uncompress-msg is the message to issue to the user when doing this
- type of uncompression (nil means no message)
-
- uncompress-program is a program that performs this compression
-
- uncompress-args is a list of args to pass to the uncompress program
-
- append-flag is non-nil if this compression technique can be
- appended
-
- strip-extension-flag non-nil means strip the regexp from file names
- before attempting to set the mode.
-
- file-magic-chars is a string of characters that you would find
- at the beginning of a file compressed in this way.
-
-Because of the way `call-process' is defined, discarding the stderr output of
-a program adds the overhead of starting a shell each time the program is
-invoked."
- :type '(repeat (vector regexp
- (choice :tag "Compress Message"
- (string :format "%v")
- (const :tag "No Message" nil))
- (string :tag "Compress Program")
- (repeat :tag "Compress Arguments" string)
- (choice :tag "Uncompress Message"
- (string :format "%v")
- (const :tag "No Message" nil))
- (string :tag "Uncompress Program")
- (repeat :tag "Uncompress Arguments" string)
- (boolean :tag "Append")
- (boolean :tag "Strip Extension")
- (string :tag "Magic Bytes")))
- :group 'jka-compr)
-
-(defcustom jka-compr-mode-alist-additions
- (list (cons "\\.tgz\\'" 'tar-mode))
- "A list of pairs to add to `auto-mode-alist' when jka-compr is installed."
- :type '(repeat (cons string symbol))
- :group 'jka-compr)
-
-(defcustom jka-compr-load-suffixes '(".gz")
- "List of suffixes to try when loading files."
- :type '(repeat string)
- :group 'jka-compr)
-
-;; List of all the elements we actually added to file-coding-system-alist.
-(defvar jka-compr-added-to-file-coding-system-alist nil)
-
-(defvar jka-compr-file-name-handler-entry
- nil
- "The entry in `file-name-handler-alist' used by the jka-compr I/O functions.")
-
(defvar jka-compr-really-do-compress nil
- "Non-nil in a buffer whose visited file was uncompressed on visiting it.")
+ "Non-nil in a buffer whose visited file was uncompressed on visiting it.
+This means compress the data on writing the file, even if the
+data appears to be compressed already.")
+(make-variable-buffer-local 'jka-compr-really-do-compress)
(put 'jka-compr-really-do-compress 'permanent-local t)
\f
-;;; Functions for accessing the return value of jka-compr-get-compression-info
-(defun jka-compr-info-regexp (info) (aref info 0))
-(defun jka-compr-info-compress-message (info) (aref info 1))
-(defun jka-compr-info-compress-program (info) (aref info 2))
-(defun jka-compr-info-compress-args (info) (aref info 3))
-(defun jka-compr-info-uncompress-message (info) (aref info 4))
-(defun jka-compr-info-uncompress-program (info) (aref info 5))
-(defun jka-compr-info-uncompress-args (info) (aref info 6))
-(defun jka-compr-info-can-append (info) (aref info 7))
-(defun jka-compr-info-strip-extension (info) (aref info 8))
-(defun jka-compr-info-file-magic-bytes (info) (aref info 9))
-
-
-(defun jka-compr-get-compression-info (filename)
- "Return information about the compression scheme of FILENAME.
-The determination as to which compression scheme, if any, to use is
-based on the filename itself and `jka-compr-compression-info-list'."
- (catch 'compression-info
- (let ((case-fold-search nil))
- (mapcar
- (function (lambda (x)
- (and (string-match (jka-compr-info-regexp x) filename)
- (throw 'compression-info x))))
- jka-compr-compression-info-list)
- nil)))
-
(put 'compression-error 'error-conditions '(compression-error file-error error))
(defun jka-compr-error (prog args infile message &optional errfile)
- (let ((errbuf (get-buffer-create " *jka-compr-error*"))
- (curbuf (current-buffer)))
+ (let ((errbuf (get-buffer-create " *jka-compr-error*")))
(with-current-buffer errbuf
(widen) (erase-buffer)
(insert (format "Error while executing \"%s %s < %s\"\n\n"
;; to discard the part we don't want.
(let ((skip (/ beg jka-compr-dd-blocksize))
(err-file (jka-compr-make-temp-name))
+ ;; call-process barfs if default-directory is inaccessible.
+ (default-directory
+ (if (and default-directory
+ (file-accessible-directory-p default-directory))
+ default-directory
+ (file-name-directory infile)))
count)
;; Update PREFIX based on the text that we won't read in.
(setq prefix (- beg (* skip jka-compr-dd-blocksize))
(defun jka-compr-call-process (prog message infile output temp args)
- (if jka-compr-use-shell
-
- (let ((err-file (jka-compr-make-temp-name))
- (coding-system-for-read (or coding-system-for-read 'undecided))
- (coding-system-for-write 'no-conversion))
-
- (unwind-protect
-
- (or (memq
- (call-process jka-compr-shell infile
- (if (stringp output) nil output)
- nil
- "-c"
- (format "%s %s 2> %s %s"
- prog
- (mapconcat 'identity args " ")
- err-file
- (if (stringp output)
- (concat "> " output)
- "")))
- jka-compr-acceptable-retval-list)
-
- (jka-compr-error prog args infile message err-file))
-
- (jka-compr-delete-temp-file err-file)))
-
- (or (zerop
- (apply 'call-process
- prog
- infile
- (if (stringp output) temp output)
- nil
- args))
- (jka-compr-error prog args infile message))
-
- (and (stringp output)
- (with-current-buffer temp
- (write-region (point-min) (point-max) output)
- (erase-buffer)))))
-
-
-;;; Support for temp files. Much of this was inspired if not lifted
-;;; from ange-ftp.
+ ;; call-process barfs if default-directory is inaccessible.
+ (let ((default-directory
+ (if (and default-directory
+ (file-accessible-directory-p default-directory))
+ default-directory
+ (file-name-directory infile))))
+ (if jka-compr-use-shell
+ (let ((err-file (jka-compr-make-temp-name))
+ (coding-system-for-read (or coding-system-for-read 'undecided))
+ (coding-system-for-write 'no-conversion))
+ (unwind-protect
+ (or (memq
+ (call-process jka-compr-shell infile
+ (if (stringp output) nil output)
+ nil
+ "-c"
+ (format "%s %s 2> %s %s"
+ prog
+ (mapconcat 'identity args " ")
+ err-file
+ (if (stringp output)
+ (concat "> " output)
+ "")))
+ jka-compr-acceptable-retval-list)
+ (jka-compr-error prog args infile message err-file))
+ (jka-compr-delete-temp-file err-file)))
+ (or (eq 0
+ (apply 'call-process
+ prog infile (if (stringp output) temp output)
+ nil args))
+ (jka-compr-error prog args infile message))
+ (and (stringp output)
+ (with-current-buffer temp
+ (write-region (point-min) (point-max) output)
+ (erase-buffer))))))
+
+
+;; Support for temp files. Much of this was inspired if not lifted
+;; from ange-ftp.
(defcustom jka-compr-temp-name-template
(expand-file-name "jka-com" temporary-file-directory)
(let ((can-append (jka-compr-info-can-append info))
(compress-program (jka-compr-info-compress-program info))
(compress-message (jka-compr-info-compress-message info))
- (uncompress-program (jka-compr-info-uncompress-program info))
- (uncompress-message (jka-compr-info-uncompress-message info))
(compress-args (jka-compr-info-compress-args info))
- (uncompress-args (jka-compr-info-uncompress-args info))
(base-name (file-name-nondirectory visit-file))
temp-file temp-buffer
;; we need to leave `last-coding-system-used' set to its
;; that `basic-save-buffer' sees the right value.
(coding-system-used last-coding-system-used))
+ (or compress-program
+ (error "No compression program defined"))
+
(setq temp-buffer (get-buffer-create " *jka-compr-wr-temp*"))
(with-current-buffer temp-buffer
(widen) (erase-buffer))
(let* ((filename (expand-file-name file))
(info (jka-compr-get-compression-info filename)))
- (if info
-
- (let ((uncompress-message (jka-compr-info-uncompress-message info))
- (uncompress-program (jka-compr-info-uncompress-program info))
- (uncompress-args (jka-compr-info-uncompress-args info))
- (base-name (file-name-nondirectory filename))
- (notfound nil)
- (local-copy
- (jka-compr-run-real-handler 'file-local-copy (list filename)))
- local-file
- size start)
-
- (setq local-file (or local-copy filename))
-
- (and
- visit
- (setq buffer-file-name filename))
-
- (unwind-protect ; to make sure local-copy gets deleted
-
- (progn
-
- (and
- uncompress-message
- (message "%s %s..." uncompress-message base-name))
-
- (condition-case error-code
-
- (let ((coding-system-for-read 'no-conversion))
- (if replace
- (goto-char (point-min)))
- (setq start (point))
- (if (or beg end)
- (jka-compr-partial-uncompress uncompress-program
- (concat uncompress-message
- " " base-name)
- uncompress-args
- local-file
- (or beg 0)
- (if (and beg end)
- (- end beg)
- end))
- ;; If visiting, bind off buffer-file-name so that
- ;; file-locking will not ask whether we should
- ;; really edit the buffer.
- (let ((buffer-file-name
- (if visit nil buffer-file-name)))
- (jka-compr-call-process uncompress-program
- (concat uncompress-message
- " " base-name)
- local-file
- t
- nil
- uncompress-args)))
- (setq size (- (point) start))
- (if replace
- (delete-region (point) (point-max)))
- (goto-char start))
- (error
- (if (and (eq (car error-code) 'file-error)
- (eq (nth 3 error-code) local-file))
- (if visit
- (setq notfound error-code)
- (signal 'file-error
- (cons "Opening input file"
- (nthcdr 2 error-code))))
- (signal (car error-code) (cdr error-code))))))
-
- (and
- local-copy
- (file-exists-p local-copy)
- (delete-file local-copy)))
-
- (decode-coding-inserted-region
- (point) (+ (point) size)
- (jka-compr-byte-compiler-base-file-name file)
- visit beg end replace)
-
- (and
- visit
- (progn
- (unlock-buffer)
- (setq buffer-file-name filename)
- (setq jka-compr-really-do-compress t)
- (set-visited-file-modtime)))
-
- (and
- uncompress-message
- (message "%s %s...done" uncompress-message base-name))
-
- (and
- visit
- notfound
- (signal 'file-error
- (cons "Opening input file" (nth 2 notfound))))
-
- ;; This is done in insert-file-contents after we return.
- ;; That is a little weird, but better to go along with it now
- ;; than to change it now.
-
-;;; ;; Run the functions that insert-file-contents would.
-;;; (let ((p after-insert-file-functions)
-;;; (insval size))
-;;; (while p
-;;; (setq insval (funcall (car p) size))
-;;; (if insval
-;;; (progn
-;;; (or (integerp insval)
-;;; (signal 'wrong-type-argument
-;;; (list 'integerp insval)))
-;;; (setq size insval)))
-;;; (setq p (cdr p))))
-
- (list filename size))
-
- (jka-compr-run-real-handler 'insert-file-contents
- (list file visit beg end replace)))))
+ (if (not info)
+
+ (jka-compr-run-real-handler 'insert-file-contents
+ (list file visit beg end replace))
+
+ (let ((uncompress-message (jka-compr-info-uncompress-message info))
+ (uncompress-program (jka-compr-info-uncompress-program info))
+ (uncompress-args (jka-compr-info-uncompress-args info))
+ (base-name (file-name-nondirectory filename))
+ (notfound nil)
+ (local-copy
+ (jka-compr-run-real-handler 'file-local-copy (list filename)))
+ local-file
+ size start)
+
+ (setq local-file (or local-copy filename))
+
+ (and
+ visit
+ (setq buffer-file-name filename))
+
+ (unwind-protect ; to make sure local-copy gets deleted
+
+ (progn
+
+ (and
+ uncompress-message
+ (message "%s %s..." uncompress-message base-name))
+
+ (condition-case error-code
+
+ (let ((coding-system-for-read 'no-conversion))
+ (if replace
+ (goto-char (point-min)))
+ (setq start (point))
+ (if (or beg end)
+ (jka-compr-partial-uncompress uncompress-program
+ (concat uncompress-message
+ " " base-name)
+ uncompress-args
+ local-file
+ (or beg 0)
+ (if (and beg end)
+ (- end beg)
+ end))
+ ;; If visiting, bind off buffer-file-name so that
+ ;; file-locking will not ask whether we should
+ ;; really edit the buffer.
+ (let ((buffer-file-name
+ (if visit nil buffer-file-name)))
+ (jka-compr-call-process uncompress-program
+ (concat uncompress-message
+ " " base-name)
+ local-file
+ t
+ nil
+ uncompress-args)))
+ (setq size (- (point) start))
+ (if replace
+ (delete-region (point) (point-max)))
+ (goto-char start))
+ (error
+ ;; If the file we wanted to uncompress does not exist,
+ ;; handle that according to VISIT as `insert-file-contents'
+ ;; would, maybe signaling the same error it normally would.
+ (if (and (eq (car error-code) 'file-error)
+ (eq (nth 3 error-code) local-file))
+ (if visit
+ (setq notfound error-code)
+ (signal 'file-error
+ (cons "Opening input file"
+ (nthcdr 2 error-code))))
+ ;; If the uncompression program can't be found,
+ ;; signal that as a non-file error
+ ;; so that find-file-noselect-1 won't handle it.
+ (if (and (eq (car error-code) 'file-error)
+ (equal (cadr error-code) "Searching for program"))
+ (error "Uncompression program `%s' not found"
+ (nth 3 error-code)))
+ (signal (car error-code) (cdr error-code))))))
+
+ (and
+ local-copy
+ (file-exists-p local-copy)
+ (delete-file local-copy)))
+
+ (unless notfound
+ (decode-coding-inserted-region
+ (point) (+ (point) size)
+ (jka-compr-byte-compiler-base-file-name file)
+ visit beg end replace))
+
+ (and
+ visit
+ (progn
+ (unlock-buffer)
+ (setq buffer-file-name filename)
+ (setq jka-compr-really-do-compress t)
+ (set-visited-file-modtime)))
+
+ (and
+ uncompress-message
+ (message "%s %s...done" uncompress-message base-name))
+
+ (and
+ visit
+ notfound
+ (signal 'file-error
+ (cons "Opening input file" (nth 2 notfound))))
+
+ ;; This is done in insert-file-contents after we return.
+ ;; That is a little weird, but better to go along with it now
+ ;; than to change it now.
+
+ ;; ;; Run the functions that insert-file-contents would.
+ ;; (let ((p after-insert-file-functions)
+ ;; (insval size))
+ ;; (while p
+ ;; (setq insval (funcall (car p) size))
+ ;; (if insval
+ ;; (progn
+ ;; (or (integerp insval)
+ ;; (signal 'wrong-type-argument
+ ;; (list 'integerp insval)))
+ ;; (setq size insval)))
+ ;; (setq p (cdr p))))
+
+ (or (jka-compr-info-compress-program info)
+ (message "You can't save this buffer because compression program is not defined"))
+
+ (list filename size)))))
(defun jka-compr-file-local-copy (file)
(jka-compr-run-real-handler 'file-local-copy (list filename)))
(temp-file (jka-compr-make-temp-name t))
(temp-buffer (get-buffer-create " *jka-compr-flc-temp*"))
- (notfound nil)
local-file)
(setq local-file (or local-copy filename))
(jka-compr-run-real-handler 'file-local-copy (list filename)))))
-;;; Support for loading compressed files.
+;; Support for loading compressed files.
(defun jka-compr-load (file &optional noerror nomessage nosuffix)
"Documented as original."
(put 'byte-compiler-base-file-name 'jka-compr
'jka-compr-byte-compiler-base-file-name)
+;;;###autoload
(defvar jka-compr-inhibit nil
"Non-nil means inhibit automatic uncompression temporarily.
Lisp programs can bind this to t to do that.
It is not recommended to set this variable permanently to anything but nil.")
-(put 'jka-compr-handler 'safe-magic t)
+;;;###autoload
(defun jka-compr-handler (operation &rest args)
(save-match-data
(let ((jka-op (get operation 'jka-compr)))
(inhibit-file-name-operation operation))
(apply operation args)))
-
-(defun jka-compr-build-file-regexp ()
- (mapconcat
- 'jka-compr-info-regexp
- jka-compr-compression-info-list
- "\\|"))
-
-
-(defun jka-compr-install ()
- "Install jka-compr.
-This adds entries to `file-name-handler-alist' and `auto-mode-alist'
-and `inhibit-first-line-modes-suffixes'."
-
- (setq jka-compr-file-name-handler-entry
- (cons (jka-compr-build-file-regexp) 'jka-compr-handler))
-
- (setq file-name-handler-alist (cons jka-compr-file-name-handler-entry
- file-name-handler-alist))
-
- (setq jka-compr-added-to-file-coding-system-alist nil)
-
- (mapcar
- (function (lambda (x)
- ;; Don't do multibyte encoding on the compressed files.
- (let ((elt (cons (jka-compr-info-regexp x)
- '(no-conversion . no-conversion))))
- (setq file-coding-system-alist
- (cons elt file-coding-system-alist))
- (setq jka-compr-added-to-file-coding-system-alist
- (cons elt jka-compr-added-to-file-coding-system-alist)))
-
- (and (jka-compr-info-strip-extension x)
- ;; Make entries in auto-mode-alist so that modes
- ;; are chosen right according to the file names
- ;; sans `.gz'.
- (setq auto-mode-alist
- (cons (list (jka-compr-info-regexp x)
- nil 'jka-compr)
- auto-mode-alist))
- ;; Also add these regexps to
- ;; inhibit-first-line-modes-suffixes, so that a
- ;; -*- line in the first file of a compressed tar
- ;; file doesn't override tar-mode.
- (setq inhibit-first-line-modes-suffixes
- (cons (jka-compr-info-regexp x)
- inhibit-first-line-modes-suffixes)))))
- jka-compr-compression-info-list)
- (setq auto-mode-alist
- (append auto-mode-alist jka-compr-mode-alist-additions))
-
- ;; Make sure that (load "foo") will find /bla/foo.el.gz.
- (setq load-suffixes
- (apply 'append
- (mapcar (lambda (suffix)
- (cons suffix
- (mapcar (lambda (ext) (concat suffix ext))
- jka-compr-load-suffixes)))
- load-suffixes))))
-
-
+;;;###autoload
(defun jka-compr-uninstall ()
"Uninstall jka-compr.
This removes the entries in `file-name-handler-alist' and `auto-mode-alist'
by `jka-compr-installed'."
;; Delete from inhibit-first-line-modes-suffixes
;; what jka-compr-install added.
- (mapcar
+ (mapc
(function (lambda (x)
(and (jka-compr-info-strip-extension x)
(setq inhibit-first-line-modes-suffixes
(delete (jka-compr-info-regexp x)
inhibit-first-line-modes-suffixes)))))
- jka-compr-compression-info-list)
+ jka-compr-compression-info-list--internal)
(let* ((fnha (cons nil file-name-handler-alist))
(last fnha))
(while (cdr last)
(setq entry (car (cdr last)))
- (if (or (member entry jka-compr-mode-alist-additions)
+ (if (or (member entry jka-compr-mode-alist-additions--internal)
(and (consp (cdr entry))
(eq (nth 2 entry) 'jka-compr)))
(setcdr last (cdr (cdr last)))
(setq auto-mode-alist (cdr ama)))
- (let* ((ama (cons nil file-coding-system-alist))
- (last ama)
- entry)
-
- (while (cdr last)
- (setq entry (car (cdr last)))
- (if (member entry jka-compr-added-to-file-coding-system-alist)
- (setcdr last (cdr (cdr last)))
- (setq last (cdr last))))
-
- (setq file-coding-system-alist (cdr ama)))
+ (while jka-compr-added-to-file-coding-system-alist
+ (setq file-coding-system-alist
+ (delq (car (member (pop jka-compr-added-to-file-coding-system-alist)
+ file-coding-system-alist))
+ file-coding-system-alist)))
;; Remove the suffixes that were added by jka-compr.
- (let ((suffixes nil)
- (re (jka-compr-build-file-regexp)))
- (dolist (suffix load-suffixes)
- (unless (string-match re suffix)
- (push suffix suffixes)))
- (setq load-suffixes (nreverse suffixes))))
-
-
-(defun jka-compr-installed-p ()
- "Return non-nil if jka-compr is installed.
-The return value is the entry in `file-name-handler-alist' for jka-compr."
-
- (let ((fnha file-name-handler-alist)
- (installed nil))
-
- (while (and fnha (not installed))
- (and (eq (cdr (car fnha)) 'jka-compr-handler)
- (setq installed (car fnha)))
- (setq fnha (cdr fnha)))
-
- installed))
-
-
-;;; Add the file I/O hook if it does not already exist.
-;;; Make sure that jka-compr-file-name-handler-entry is eq to the
-;;; entry for jka-compr in file-name-handler-alist.
-(and (jka-compr-installed-p)
- (jka-compr-uninstall))
-
-
-;;;###autoload
-(define-minor-mode auto-compression-mode
- "Toggle automatic file compression and uncompression.
-With prefix argument ARG, turn auto compression on if positive, else off.
-Returns the new status of auto compression (non-nil means on)."
- :global t :group 'jka-compr
- (let* ((installed (jka-compr-installed-p))
- (flag auto-compression-mode))
- (cond
- ((and flag installed) t) ; already installed
- ((and (not flag) (not installed)) nil) ; already not installed
- (flag (jka-compr-install))
- (t (jka-compr-uninstall)))))
-
-
-;;;###autoload
-(defmacro with-auto-compression-mode (&rest body)
- "Evalute BODY with automatic file compression and uncompression enabled."
- (let ((already-installed (make-symbol "already-installed")))
- `(let ((,already-installed (jka-compr-installed-p)))
- (unwind-protect
- (progn
- (unless ,already-installed
- (jka-compr-install))
- ,@body)
- (unless ,already-installed
- (jka-compr-uninstall))))))
-(put 'with-auto-compression-mode 'lisp-indent-function 0)
+ (dolist (suff jka-compr-load-suffixes--internal)
+ (setq load-file-rep-suffixes (delete suff load-file-rep-suffixes)))
+ (setq jka-compr-compression-info-list--internal nil
+ jka-compr-mode-alist-additions--internal nil
+ jka-compr-load-suffixes--internal nil))
(provide 'jka-compr)
+;; arch-tag: 3f15b630-e9a7-46c4-a22a-94afdde86ebc
;;; jka-compr.el ends here
HCoop / bpt / emacs.git / blobdiff