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Diffstat (limited to 'lisp/vc-arch.el')
| -rw-r--r-- | lisp/vc-arch.el | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/lisp/vc-arch.el b/lisp/vc-arch.el new file mode 100644 index 00000000000..555d49b65fb --- /dev/null +++ b/lisp/vc-arch.el @@ -0,0 +1,243 @@ +;;; vc-arch.el --- VC backend for the Arch version-control system + +;; Copyright (C) 1995,98,99,2000,01,02,03,2004 Free Software Foundation, Inc. + +;; Author: FSF (see vc.el for full credits) +;; Maintainer: Stefan Monnier <monnier@gnu.org> + +;; This file is part of GNU Emacs. + +;; 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) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; 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. + +;;; Commentary: + +;; The home page of the Arch version control system is at +;; +;; http://www.gnuarch.org/ +;; +;; This is derived from vc-mcvs.el as follows: +;; - cp vc-mcvs.el vc-arch.el and then M-% mcvs RET arch RET +;; +;; Then of course started the hacking. +;; +;; What has been partly tested: +;; - Open a file +;; - C-x v = without any prefix arg +;; - C-x v v to commit a change to a single file + +;; Bugs: + +;; - All files under the tree are considered as "under Arch's control" +;; without regards to =tagging-method and such. +;; - Files are always considered as `edited'. +;; - C-x v i does not work. +;; - VC-dired does not work. +;; - And more... + +;;; Code: + +(eval-when-compile (require 'vc)) + +;;; +;;; Customization options +;;; + +(defvar vc-arch-command + (let ((candidates '("tla"))) + (while (and candidates (not (executable-find (car candidates)))) + (setq candidates (cdr candidates))) + (or (car candidates) "tla"))) + +;; Clear up the cache to force vc-call to check again and discover +;; new functions when we reload this file. +(put 'Arch 'vc-functions nil) + +;;;###autoload (defun vc-arch-registered (file) +;;;###autoload (let ((dir file)) +;;;###autoload (while (and (stringp dir) +;;;###autoload (not (equal +;;;###autoload dir (setq dir (file-name-directory dir)))) +;;;###autoload dir) +;;;###autoload (setq dir (if (file-directory-p +;;;###autoload (expand-file-name "{arch}" dir)) +;;;###autoload t (directory-file-name dir)))) +;;;###autoload (if (eq dir t) +;;;###autoload (progn +;;;###autoload (load "vc-arch") +;;;###autoload (vc-arch-registered file))))) + +(defun vc-arch-add-tag () + "Add an `arch-tag' to the end of the current file." + (interactive) + (goto-char (point-max)) + (forward-comment -1) + (unless (bolp) (insert "\n")) + (let ((beg (point))) + (insert "arch-tag: ") + (call-process "uuidgen" nil t) ;Also inserts a terminal newline. + (comment-region beg (point)))) + +(defun vc-arch-root (file) + "Return the root directory of a Arch project, if any." + (or (vc-file-getprop file 'arch-root) + (vc-file-setprop + file 'arch-root + (let ((root nil)) + (while (not (or root + (equal file (setq file (file-name-directory file))) + (null file))) + (if (file-directory-p (expand-file-name "{arch}" file)) + (setq root file) + (setq file (directory-file-name file)))) + root)))) + +(defun vc-arch-registered (file) + ;; Don't check whether it's source or not. Checking would require + ;; running TLA, so it's better to not do it, so it also works if TLA is + ;; not installed. + (vc-arch-root file)) + +(defun vc-arch-default-version (file) + (or (vc-file-getprop (vc-arch-root file) 'arch-default-version) + (let* ((root (vc-arch-root file)) + (f (expand-file-name "{arch}/++default-version" root))) + (if (file-readable-p f) + (vc-file-setprop + root 'arch-default-version + (with-temp-buffer + (insert-file-contents f) + ;; Strip the terminating newline. + (buffer-substring (point-min) (1- (point-max))))))))) + +(defun vc-arch-state (file) + ;; There's no checkout operation and merging is not done from VC + ;; so the only operation that's state dependent that VC supports is commit + ;; which is only activated if the file is `edited'. + 'edited) + +(defun vc-arch-workfile-version (file) + (let* ((root (expand-file-name "{arch}" (vc-arch-root file))) + (defbranch (vc-arch-default-version file))) + (when (and defbranch (string-match "\\`\\(.+@[^/\n]+\\)/\\(\\(\\(.*\\)--.*\\)--.*\\)\\'" defbranch)) + (let* ((archive (match-string 1 defbranch)) + (category (match-string 4 defbranch)) + (branch (match-string 3 defbranch)) + (version (match-string 2 defbranch)) + (rev-nb 0) + (rev nil) + logdir tmp) + (setq logdir (expand-file-name category root)) + (setq logdir (expand-file-name branch logdir)) + (setq logdir (expand-file-name version logdir)) + (setq logdir (expand-file-name archive logdir)) + (setq logdir (expand-file-name "patch-log" logdir)) + (dolist (file (directory-files logdir)) + (if (and (string-match "-\\([0-9]+\\)\\'" file) + (setq tmp (string-to-number (match-string 1 file))) + (>= tmp rev-nb)) + (setq rev-nb tmp rev file))) + (concat defbranch "--" rev))))) + + +(defcustom vc-arch-mode-line-rewrite + '(("\\`.*--\\(.*--.*\\)--.*-\\([0-9]+\\)\\'" . "\\2[\\1]")) + "Rewrite rules to shorten Arch's revision names on the mode-line." + :type '(repeat (cons regexp string))) + +(defun vc-arch-mode-line-string (file) + "Return string for placement in modeline by `vc-mode-line' for FILE." + (let ((rev (vc-workfile-version file))) + (dolist (rule vc-arch-mode-line-rewrite) + (if (string-match (car rule) rev) + (setq rev (replace-match (cdr rule) t nil rev)))) + (format "Arch%c%s" + (if (memq (vc-state file) '(up-to-date needs-patch)) ?- ?:) + rev))) + +(defun vc-arch-diff3-rej-p (rej) + (and (eq (nth 7 (file-attributes rej)) 56) + (with-temp-buffer + (insert-file-contents rej) + (goto-char (point-min)) + (looking-at "Conflicts occured, diff3 conflict markers left in file\\.$")))) + +(defun vc-arch-delete-rej-if-obsolete () + "For use in `write-file-functions'." + (let ((rej (concat buffer-file-name ".rej"))) + (when (and buffer-file-name (vc-arch-diff3-rej-p rej)) + (if (not (re-search-forward "^>>>>>>> " nil t)) + ;; The .rej file is obsolete. + (condition-case nil (delete-file rej) (error nil))))) + ;; This did not save the buffer. + nil) + +(defun vc-arch-find-file-hook () + (let ((rej (concat buffer-file-name ".rej"))) + (when (and buffer-file-name (file-exists-p rej)) + (if (vc-arch-diff3-rej-p rej) + (save-excursion + (goto-char (point-min)) + (if (not (re-search-forward "^>>>>>>> " nil t)) + ;; The .rej file is obsolete. + (condition-case nil (delete-file rej) (error nil)) + (smerge-mode 1) + (add-hook 'write-file-functions + 'vc-arch-delete-rej-if-obsolete nil t) + (message "There are unresolved conflicts in this file"))) + (message "There are unresolved conflicts in %s" + (file-name-nondirectory rej)))))) + +(defun vc-arch-checkout-model (file) 'implicit) + +(defun vc-arch-checkin (file rev comment) + (if rev (error "Committing to a specific revision is unsupported.")) + (vc-arch-command nil 0 file "commit" "-L" comment "--" + (vc-switches 'Arch 'checkin))) + +(defun vc-arch-diff (file &optional oldvers newvers) + "Get a difference report using Arch between two versions of FILE." + (if newvers + (error "Diffing specific revisions not implemented.") + (let* ((async (fboundp 'start-process)) + ;; Run the command from the root dir. + (default-directory (vc-arch-root file)) + (status + (vc-arch-command + "*vc-diff*" + (if async 'async 1) + nil "file-diffs" + ;; Arch does not support the typical flags. + ;; (vc-switches 'Arch 'diff) + (file-relative-name file) + (if (equal oldvers (vc-workfile-version file)) + nil + oldvers)))) + (if async 1 status)))) ; async diff, pessimistic assumption. + +(defun vc-arch-delete-file (file) + (vc-arch-command nil 0 file "rm")) + +(defun vc-arch-rename-file (old new) + (vc-arch-command nil 0 new "mv" (file-relative-name old))) + +(defun vc-arch-command (buffer okstatus file &rest flags) + "A wrapper around `vc-do-command' for use in vc-arch.el." + (apply 'vc-do-command buffer okstatus vc-arch-command file flags)) + +(provide 'vc-arch) + +;;; arch-tag: a35c7c1c-5237-429d-88ef-3d718fd2e704 +;;; vc-arch.el ends here |