diff --git a/contrib/mq.el b/contrib/mq.el new file mode 100644 --- /dev/null +++ b/contrib/mq.el @@ -0,0 +1,206 @@ +;;; mq.el --- Emacs support for Mercurial Queues + +;; Copyright (C) 2006 Bryan O'Sullivan + +;; Author: Bryan O'Sullivan + +;; mq.el is free software; you can redistribute it and/or modify it +;; under the terms of version 2 of the GNU General Public License as +;; published by the Free Software Foundation. + +;; 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, write to the Free Software Foundation, Inc., 59 +;; Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +(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) + + +;;; Internal variables. + +(defvar mq-patch-history nil) + + +;;; Global keymap. + +(defvar mq-global-map (make-sparse-keymap)) +(fset 'mq-global-map mq-global-map) +(global-set-key mq-global-prefix 'mq-global-map) +(define-key mq-global-map "." 'mq-push) +(define-key mq-global-map ">" 'mq-push-all) +(define-key mq-global-map "," 'mq-pop) +(define-key mq-global-map "<" 'mq-pop-all) +(define-key mq-global-map "r" 'mq-refresh) +(define-key mq-global-map "e" 'mq-refresh-edit) +(define-key mq-global-map "n" 'mq-next) +(define-key mq-global-map "p" 'mq-previous) +(define-key mq-global-map "t" 'mq-top) + + +;;; Helper functions. + +(defun mq-read-patch-name (&optional source prompt) + "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 current-prefix-arg + (completing-read (format "Patch%s: " (or prompt "")) + (map 'list 'cons patches 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)) + +(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"))) + (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 (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"))) + (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 () + "Refresh the topmost applied patch." + (interactive) + (let ((root (hg-root))) + (unless root + (error "Cannot refresh outside a repository!")) + (hg-sync-buffers root) + (message "Refreshing patch...") + (let ((ret (hg-run "qrefresh"))) + (if (equal (car ret) 0) + (message "Refreshing patch... done.") + (error "Refreshing patch... %s" (hg-chomp (cdr ret))))))) + +(defun mq-patch-info (msg cmd) + (let ((ret (hg-run cmd))) + (if (equal (car ret) 0) + (message "%s %s" msg (hg-chomp (cdr ret))) + (error "%s" (cdr ret))))) + +(defun mq-top () + "Print the name of the topmost applied patch." + (interactive) + (mq-patch-info "Top patch is " "qtop")) + +(defun mq-next () + "Print the name of the next patch to be pushed." + (interactive) + (mq-patch-info "Next patch is " "qnext")) + +(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 "Previous patch is " "qprev")) + +(defun mq-refresh-edit () + "Refresh the topmost applied patch, editing the patch description." + (interactive) + (error "Not yet implemented")) + + +(provide 'mq) + + +;;; Local Variables: +;;; prompt-to-byte-compile: nil +;;; end: