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(uncompress-program): New variable.

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(uncompress-backup-file): Use it.
(uncompress-while-visiting): Use that var.  Handle .gz suffix.
(auto-mode-alist): Handle .gz suffix.
(find-compressed-version): Handle .gz suffix.
This commit is contained in:
Richard M. Stallman 1994-04-04 20:48:08 +00:00
parent 399f8dd645
commit baf90b6226
1 changed files with 25 additions and 11 deletions
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36
lisp/uncompress.el
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@ -34,26 +34,36 @@
;; so that making the backup can work properly.
;; This is used as a write-file-hook.
(defvar uncompress-program "gunzip"
"Program to use for uncompression.")
(defun uncompress-backup-file ()
(and buffer-file-name make-backup-files (not buffer-backed-up)
(not (file-exists-p buffer-file-name))
(call-process "uncompress" nil nil nil buffer-file-name))
(call-process uncompress-program nil nil nil buffer-file-name))
nil)
(or (assoc "\\.Z$" auto-mode-alist)
(setq auto-mode-alist
(cons '("\\.Z$" . uncompress-while-visiting) auto-mode-alist)))
(or (assoc "\\.gz$" auto-mode-alist)
(setq auto-mode-alist
(cons '("\\.gz$" . uncompress-while-visiting) auto-mode-alist)))
(defun uncompress-while-visiting ()
"Temporary \"major mode\" used for .Z files, to uncompress the contents.
"Temporary \"major mode\" used for .Z and .gz files, to uncompress them.
It then selects a major mode from the uncompressed file name and contents."
(if (and (not (null buffer-file-name))
(string-match "\\.Z$" buffer-file-name))
(set-visited-file-name
(substring buffer-file-name 0 (match-beginning 0))))
(substring buffer-file-name 0 (match-beginning 0)))
(if (and (not (null buffer-file-name))
(string-match "\\.gz$" buffer-file-name))
(set-visited-file-name
(substring buffer-file-name 0 (match-beginning 0)))))
(message "Uncompressing...")
(let ((buffer-read-only nil))
(shell-command-on-region (point-min) (point-max) "uncompress" t))
(shell-command-on-region (point-min) (point-max) uncompress-program t))
(message "Uncompressing...done")
(set-buffer-modified-p nil)
(make-local-variable 'write-file-hooks)
@ -69,13 +79,17 @@ It then selects a major mode from the uncompressed file name and contents."
"Hook to read and uncompress the compressed version of a file."
;; Just pretend we had visited the compressed file,
;; and uncompress-while-visiting will do the rest.
(if (file-exists-p (concat buffer-file-name ".Z"))
(progn
(setq buffer-file-name (concat buffer-file-name ".Z"))
(insert-file-contents buffer-file-name t)
(goto-char (point-min))
(setq error nil)
t)))
(let (name)
(if (file-exists-p (setq name (concat buffer-file-name ".Z")))
(setq buffer-file-name name)
(if (file-exists-p (setq name (concat buffer-file-name ".gz")))
(setq buffer-file-name name)))
(if (eq name buffer-file-name)
(progn
(insert-file-contents buffer-file-name t)
(goto-char (point-min))
(setq error nil)
t))))
(provide 'uncompress)