From 0766bec8071c7c793d6c81211577832d9a7a78f9 Mon Sep 17 00:00:00 2001 From: Ruijie Yu Date: Thu, 9 Feb 2023 00:45:19 +0800 Subject: [PATCH] lisp/arc-mode.el Work around zip's filename limitations on extension [DRAFT PATCH] Fixes 61326. The "zip" executable requires that the named archive must have an extension, else it attaches ".zip" to the supplied file name, causing incorrect behaviors. This patch looks for such scenarios and temporarily rename extension-less archives so that "zip" would function correctly. Currently there are no tests. I might need some pointers as to where existing tests are and how to write them. --- lisp/arc-mode.el | 64 ++++++++++++++++++++++++++++++++++++------------ 1 file changed, 48 insertions(+), 16 deletions(-) diff --git a/lisp/arc-mode.el b/lisp/arc-mode.el index 6f3e922880d..875b3971086 100644 --- a/lisp/arc-mode.el +++ b/lisp/arc-mode.el @@ -645,6 +645,49 @@ archive-get-descr (if (not noerror) (error "Line does not describe a member of the archive"))))) ;; ------------------------------------------------------------------------- +;;; Section: Helper functions for requiring filename extensions + +(defun archive--act-files (command files) + (lambda (archive) + (apply #'call-process (car command) + nil nil nil (append (cdr command) (cons archive files))))) + +(defun archive--need-rename-p (&optional archive) + (let ((archive + (file-name-nondirectory (or archive buffer-file-name)))) + (cl-case archive-subtype + ((zip) (not (seq-contains-p archive ?. #'eq)))))) + +(defun archive--ensure-extension (archive ensure-extension) + (if ensure-extension + (make-temp-name (expand-file-name (concat archive "_tmp."))) + archive)) + +(defun archive--maybe-rename (newname need-rename-p) + ;; Operating with archive as current buffer, and protect + ;; `default-directory' from being modified in `rename-visited-file'. + (when need-rename-p + (let ((default-directory default-directory)) + (rename-visited-file newname)))) + +(defun archive--with-ensure-extension (archive proc-fn) + (let ((saved default-directory)) + (with-current-buffer (find-buffer-visiting archive) + (let ((ensure-extension (archive--need-rename-p)) + (default-directory saved)) + (unwind-protect + ;; Some archive programs (like zip) expect filenames to + ;; have an extension, so if necessary, temporarily rename + ;; an extensionless file for write accesses. + (let ((archive (archive--ensure-extension + archive ensure-extension))) + (archive--maybe-rename archive ensure-extension) + (let ((exitcode (funcall proc-fn archive))) + (or (zerop exitcode) + (error "Updating was unsuccessful (%S)" exitcode)))) + (progn (archive--maybe-rename archive ensure-extension) + (revert-buffer nil t))))))) +;; ------------------------------------------------------------------------- ;;; Section: the mode definition ;;;###autoload @@ -1376,16 +1419,9 @@ archive-*-write-file-member (setq ename (encode-coding-string ename archive-file-name-coding-system)) (let* ((coding-system-for-write 'no-conversion) - (default-directory (file-name-as-directory archive-tmpdir)) - (exitcode (apply #'call-process - (car command) - nil - nil - nil - (append (cdr command) - (list archive ename))))) - (or (zerop exitcode) - (error "Updating was unsuccessful (%S)" exitcode)))) + (default-directory (file-name-as-directory archive-tmpdir))) + (archive--with-ensure-extension + archive (archive--act-files command (list ename))))) (archive-delete-local tmpfile)))) (defun archive-write-file (&optional file) @@ -1539,12 +1575,8 @@ archive-expunge (revert-buffer)))))) (defun archive-*-expunge (archive files command) - (apply #'call-process - (car command) - nil - nil - nil - (append (cdr command) (cons archive files)))) + (archive--with-ensure-extension + archive (archive--act-files command files))) (defun archive-rename-entry (newname) "Change the name associated with this entry in the archive file." -- 2.39.1