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