From d8047b996084d3cf90d6e9fa813450ca222c5957 Mon Sep 17 00:00:00 2001 From: Jim Blandy Date: Sun, 5 Feb 1989 05:17:10 +0000 Subject: Initial revision --- lisp/uncompress.el | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 lisp/uncompress.el (limited to 'lisp/uncompress.el') diff --git a/lisp/uncompress.el b/lisp/uncompress.el new file mode 100644 index 00000000000..6897c7c3ccb --- /dev/null +++ b/lisp/uncompress.el @@ -0,0 +1,47 @@ +;; When we are about to make a backup file, +;; uncompress the file we visited +;; so that making the backup can work properly. +;; This is used as a write-file-hook. + +(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)) + nil) + +(or (assoc "\\.Z$" auto-mode-alist) + (setq auto-mode-alist + (cons '("\\.Z$" . uncompress-while-visiting) auto-mode-alist))) + +(defun uncompress-while-visiting () + "Temporary \"major mode\" used for .Z files, to uncompress the contents. +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)))) + (message "Uncompressing...") + (let ((buffer-read-only nil)) + (shell-command-on-region (point-min) (point-max) "uncompress" t)) + (message "Uncompressing...done") + (set-buffer-modified-p nil) + (make-local-variable 'write-file-hooks) + (or (memq 'uncompress-backup-file write-file-hooks) + (setq write-file-hooks (cons 'uncompress-backup-file write-file-hooks))) + (normal-mode)) + +(or (memq 'find-compressed-version find-file-not-found-hooks) + (setq find-file-not-found-hooks + (cons 'find-compressed-version find-file-not-found-hooks))) + +(defun find-compressed-version () + "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))) -- cgit v1.2.1