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;;; mq.el --- Emacs support for Mercurial Queues ;; Copyright (C) 2006 Bryan O'Sullivan ;; Author: Bryan O'Sullivan <bos@serpentine.com> ;; mq.el is free software; you can redistribute it and/or modify it ;; under the terms of the GNU General Public License version 2 or any ;; later version. ;; mq.el 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 mq.el, GNU Emacs, or XEmacs; see the file COPYING (`C-h ;; C-l'). If not, see <http://www.gnu.org/licenses/>. (eval-when-compile (require 'cl)) (require 'mercurial) (defcustom mq-mode-hook nil "Hook run when a buffer enters mq-mode." :type 'sexp :group 'mercurial) (defcustom mq-global-prefix "\C-cq" "The global prefix for Mercurial Queues keymap bindings." :type 'sexp :group 'mercurial) (defcustom mq-edit-mode-hook nil "Hook run after a buffer is populated to edit a patch description." :type 'sexp :group 'mercurial) (defcustom mq-edit-finish-hook nil "Hook run before a patch description is finished up with." :type 'sexp :group 'mercurial) (defcustom mq-signoff-address nil "Address with which to sign off on a patch." :type 'string :group 'mercurial) ;;; Internal variables. (defvar mq-mode nil "Is this file managed by MQ?") (make-variable-buffer-local 'mq-mode) (put 'mq-mode 'permanent-local t) (defvar mq-patch-history nil) (defvar mq-top-patch '(nil)) (defvar mq-prev-buffer nil) (make-variable-buffer-local 'mq-prev-buffer) (put 'mq-prev-buffer 'permanent-local t) (defvar mq-top nil) (make-variable-buffer-local 'mq-top) (put 'mq-top 'permanent-local t) ;;; Global keymap. (defvar mq-global-map (let ((map (make-sparse-keymap))) (define-key map "." 'mq-push) (define-key map ">" 'mq-push-all) (define-key map "," 'mq-pop) (define-key map "<" 'mq-pop-all) (define-key map "=" 'mq-diff) (define-key map "r" 'mq-refresh) (define-key map "e" 'mq-refresh-edit) (define-key map "i" 'mq-new) (define-key map "n" 'mq-next) (define-key map "o" 'mq-signoff) (define-key map "p" 'mq-previous) (define-key map "s" 'mq-edit-series) (define-key map "t" 'mq-top) map)) (global-set-key mq-global-prefix mq-global-map) (add-minor-mode 'mq-mode 'mq-mode) ;;; Refresh edit mode keymap. (defvar mq-edit-mode-map (let ((map (make-sparse-keymap))) (define-key map "\C-c\C-c" 'mq-edit-finish) (define-key map "\C-c\C-k" 'mq-edit-kill) (define-key map "\C-c\C-s" 'mq-signoff) map)) ;;; Helper functions. (defun mq-read-patch-name (&optional source prompt force) "Read a patch name to use with a command. May return nil, meaning \"use the default\"." (let ((patches (split-string (hg-chomp (hg-run0 (or source "qseries"))) "\n"))) (when force (completing-read (format "Patch%s: " (or prompt "")) (mapcar (lambda (x) (cons x x)) patches) nil nil nil 'mq-patch-history)))) (defun mq-refresh-buffers (root) (save-excursion (dolist (buf (hg-buffers-visiting-repo root)) (when (not (verify-visited-file-modtime buf)) (set-buffer buf) (let ((ctx (hg-buffer-context))) (message "Refreshing %s..." (buffer-name)) (revert-buffer t t t) (hg-restore-context ctx) (message "Refreshing %s...done" (buffer-name)))))) (hg-update-mode-lines root) (mq-update-mode-lines root)) (defun mq-last-line () (goto-char (point-max)) (beginning-of-line) (when (looking-at "^$") (forward-line -1)) (let ((bol (point))) (end-of-line) (let ((line (buffer-substring bol (point)))) (when (> (length line) 0) line)))) (defun mq-push (&optional patch) "Push patches until PATCH is reached. If PATCH is nil, push at most one patch." (interactive (list (mq-read-patch-name "qunapplied" " to push" current-prefix-arg))) (let ((root (hg-root)) (prev-buf (current-buffer)) last-line ok) (unless root (error "Cannot push outside a repository!")) (hg-sync-buffers root) (let ((buf-name (format "MQ: Push %s" (or patch "next patch")))) (kill-buffer (get-buffer-create buf-name)) (split-window-vertically) (other-window 1) (switch-to-buffer (get-buffer-create buf-name)) (cd root) (message "Pushing...") (setq ok (= 0 (apply 'call-process (hg-binary) nil t t "qpush" (if patch (list patch)))) last-line (mq-last-line)) (let ((lines (count-lines (point-min) (point-max)))) (if (or (<= lines 1) (and (equal lines 2) (string-match "Now at:" last-line))) (progn (kill-buffer (current-buffer)) (delete-window)) (hg-view-mode prev-buf)))) (mq-refresh-buffers root) (sit-for 0) (when last-line (if ok (message "Pushing... %s" last-line) (error "Pushing... %s" last-line))))) (defun mq-push-all () "Push patches until all are applied." (interactive) (mq-push "-a")) (defun mq-pop (&optional patch) "Pop patches until PATCH is reached. If PATCH is nil, pop at most one patch." (interactive (list (mq-read-patch-name "qapplied" " to pop to" current-prefix-arg))) (let ((root (hg-root)) last-line ok) (unless root (error "Cannot pop outside a repository!")) (hg-sync-buffers root) (set-buffer (generate-new-buffer "qpop")) (cd root) (message "Popping...") (setq ok (= 0 (apply 'call-process (hg-binary) nil t t "qpop" (if patch (list patch)))) last-line (mq-last-line)) (kill-buffer (current-buffer)) (mq-refresh-buffers root) (sit-for 0) (when last-line (if ok (message "Popping... %s" last-line) (error "Popping... %s" last-line))))) (defun mq-pop-all () "Push patches until none are applied." (interactive) (mq-pop "-a")) (defun mq-refresh-internal (root &rest args) (hg-sync-buffers root) (let ((patch (mq-patch-info "qtop"))) (message "Refreshing %s..." patch) (let ((ret (apply 'hg-run "qrefresh" args))) (if (equal (car ret) 0) (message "Refreshing %s... done." patch) (error "Refreshing %s... %s" patch (hg-chomp (cdr ret))))))) (defun mq-refresh (&optional git) "Refresh the topmost applied patch. With a prefix argument, generate a git-compatible patch." (interactive "P") (let ((root (hg-root))) (unless root (error "Cannot refresh outside of a repository!")) (apply 'mq-refresh-internal root (if git '("--git"))))) (defun mq-patch-info (cmd &optional msg) (let* ((ret (hg-run cmd)) (info (hg-chomp (cdr ret)))) (if (equal (car ret) 0) (if msg (message "%s patch: %s" msg info) info) (error "%s" info)))) (defun mq-top () "Print the name of the topmost applied patch." (interactive) (mq-patch-info "qtop" "Top")) (defun mq-next () "Print the name of the next patch to be pushed." (interactive) (mq-patch-info "qnext" "Next")) (defun mq-previous () "Print the name of the first patch below the topmost applied patch. This would become the active patch if popped to." (interactive) (mq-patch-info "qprev" "Previous")) (defun mq-edit-finish () "Finish editing the description of this patch, and refresh the patch." (interactive) (unless (equal (mq-patch-info "qtop") mq-top) (error "Topmost patch has changed!")) (hg-sync-buffers hg-root) (run-hooks 'mq-edit-finish-hook) (mq-refresh-internal hg-root "-m" (buffer-substring (point-min) (point-max))) (let ((buf mq-prev-buffer)) (kill-buffer nil) (switch-to-buffer buf))) (defun mq-edit-kill () "Kill the edit currently being prepared." (interactive) (when (or (not (buffer-modified-p)) (y-or-n-p "Really kill this edit? ")) (let ((buf mq-prev-buffer)) (kill-buffer nil) (switch-to-buffer buf)))) (defun mq-get-top (root) (let ((entry (assoc root mq-top-patch))) (if entry (cdr entry)))) (defun mq-set-top (root patch) (let ((entry (assoc root mq-top-patch))) (if entry (if patch (setcdr entry patch) (setq mq-top-patch (delq entry mq-top-patch))) (setq mq-top-patch (cons (cons root patch) mq-top-patch))))) (defun mq-update-mode-lines (root) (let ((cwd default-directory)) (cd root) (condition-case nil (mq-set-top root (mq-patch-info "qtop")) (error (mq-set-top root nil))) (cd cwd)) (let ((patch (mq-get-top root))) (save-excursion (dolist (buf (hg-buffers-visiting-repo root)) (set-buffer buf) (if mq-mode (setq mq-mode (or (and patch (concat " MQ:" patch)) " MQ"))))))) (defun mq-mode (&optional arg) "Minor mode for Mercurial repositories with an MQ patch queue" (interactive "i") (cond ((hg-root) (setq mq-mode (if (null arg) (not mq-mode) arg)) (mq-update-mode-lines (hg-root)))) (run-hooks 'mq-mode-hook)) (defun mq-edit-mode () "Mode for editing the description of a patch. Key bindings ------------ \\[mq-edit-finish] use this description \\[mq-edit-kill] abandon this description" (interactive) (use-local-map mq-edit-mode-map) (set-syntax-table text-mode-syntax-table) (setq local-abbrev-table text-mode-abbrev-table major-mode 'mq-edit-mode mode-name "MQ-Edit") (set-buffer-modified-p nil) (setq buffer-undo-list nil) (run-hooks 'text-mode-hook 'mq-edit-mode-hook)) (defun mq-refresh-edit () "Refresh the topmost applied patch, editing the patch description." (interactive) (while mq-prev-buffer (set-buffer mq-prev-buffer)) (let ((root (hg-root)) (prev-buffer (current-buffer)) (patch (mq-patch-info "qtop"))) (hg-sync-buffers root) (let ((buf-name (format "*MQ: Edit description of %s*" patch))) (switch-to-buffer (get-buffer-create buf-name)) (when (= (point-min) (point-max)) (set (make-local-variable 'hg-root) root) (set (make-local-variable 'mq-top) patch) (setq mq-prev-buffer prev-buffer) (insert (hg-run0 "qheader")) (goto-char (point-min))) (mq-edit-mode) (cd root))) (message "Type `C-c C-c' to finish editing and refresh the patch.")) (defun mq-new (name) "Create a new empty patch named NAME. The patch is applied on top of the current topmost patch. With a prefix argument, forcibly create the patch even if the working directory is modified." (interactive (list (mq-read-patch-name "qseries" " to create" t))) (message "Creating patch...") (let ((ret (if current-prefix-arg (hg-run "qnew" "-f" name) (hg-run "qnew" name)))) (if (equal (car ret) 0) (progn (hg-update-mode-lines (buffer-file-name)) (message "Creating patch... done.")) (error "Creating patch... %s" (hg-chomp (cdr ret)))))) (defun mq-edit-series () "Edit the MQ series file directly." (interactive) (let ((root (hg-root))) (unless root (error "Not in an MQ repository!")) (find-file (concat root ".hg/patches/series")))) (defun mq-diff (&optional git) "Display a diff of the topmost applied patch. With a prefix argument, display a git-compatible diff." (interactive "P") (hg-view-output ((format "MQ: Diff of %s" (mq-patch-info "qtop"))) (if git (call-process (hg-binary) nil t nil "qdiff" "--git") (call-process (hg-binary) nil t nil "qdiff")) (diff-mode) (font-lock-fontify-buffer))) (defun mq-signoff () "Sign off on the current patch, in the style used by the Linux kernel. If the variable mq-signoff-address is non-nil, it will be used, otherwise the value of the ui.username item from your hgrc will be used." (interactive) (let ((was-editing (eq major-mode 'mq-edit-mode)) signed) (unless was-editing (mq-refresh-edit)) (save-excursion (let* ((user (or mq-signoff-address (hg-run0 "debugconfig" "ui.username"))) (signoff (concat "Signed-off-by: " user))) (if (search-forward signoff nil t) (message "You have already signed off on this patch.") (goto-char (point-max)) (let ((case-fold-search t)) (if (re-search-backward "^Signed-off-by: " nil t) (forward-line 1) (insert "\n"))) (insert signoff) (message "%s" signoff) (setq signed t)))) (unless was-editing (if signed (mq-edit-finish) (mq-edit-kill))))) (provide 'mq) ;;; Local Variables: ;;; prompt-to-byte-compile: nil ;;; end: