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;;; bzr.el -- version control commands for Bazaar-NG.
;;; Copyright 2005 Luke Gorrie <luke@member.fsf.org>
;;;
;;; bzr.el is free software distributed under the terms of the GNU
;;; General Public Licence, version 2. For details see the file
;;; COPYING in the GNU Emacs distribution.
;;;
;;; This is MAJOR copy & paste job from darcs.el
(eval-when-compile
(unless (fboundp 'define-minor-mode)
(require 'easy-mmode)
(defalias 'define-minor-mode 'easy-mmode-define-minor-mode))
(when (featurep 'xemacs)
(require 'cl)))
;;;; Configurables
(defvar bzr-command-prefix "\C-cb"
;; This default value breaks the Emacs rules and uses a sequence
;; reserved for the user's own custom bindings. That's not good but
;; I can't think of a decent standard one. -luke (14/Mar/2005)
"Prefix sequence for bzr-mode commands.")
(defvar bzr-command "bzr"
"*Shell command to execute bzr.")
(defvar bzr-buffer "*bzr-command*"
"Buffer for user-visible bzr command output.")
;;;; Minor-mode
(define-minor-mode bzr-mode
"\\{bzr-mode-map}"
nil
" bzr"
;; Coax define-minor-mode into creating a keymap.
;; We'll fill it in manually though because define-minor-mode seems
;; hopeless for changing bindings without restarting Emacs.
`((,bzr-command-prefix . fake)))
(defvar bzr-mode-commands-map nil
"Keymap for bzr-mode commands.
This map is bound to a prefix sequence in `bzr-mode-map'.")
(defconst bzr-command-keys '(("l" bzr-log)
("d" bzr-diff)
("s" bzr-status)
("c" bzr-commit))
"Keys to bind in `bzr-mode-commands-map'.")
(defun bzr-init-command-keymap ()
"Bind the bzr-mode keys.
This command can be called interactively to redefine the keys from
`bzr-commands-keys'."
(interactive)
(setq bzr-mode-commands-map (make-sparse-keymap))
(dolist (spec bzr-command-keys)
(define-key bzr-mode-commands-map (car spec) (cadr spec)))
(define-key bzr-mode-map bzr-command-prefix bzr-mode-commands-map))
(bzr-init-command-keymap)
;;;; Commands
(defun bzr-log ()
"Run \"bzr log\" in the repository top-level."
(interactive)
(bzr "log"))
(defun bzr-diff ()
"Run \"bzr diff\" in the repository top-level."
(interactive)
(save-some-buffers)
(bzr-run-command (bzr-command "diff") 'diff-mode))
(defun bzr-status ()
"Run \"bzr diff\" in the repository top-level."
(interactive)
(bzr "status"))
(defun bzr-commit (message)
"Run \"bzr diff\" in the repository top-level."
(interactive "sCommit message: ")
(save-some-buffers)
(bzr "commit -m %s" (shell-quote-argument message)))
;;;; Utilities
(defun bzr (format &rest args)
(bzr-run-command (apply #'bzr-command format args)))
(defun bzr-command (format &rest args)
(concat bzr-command " " (apply #'format format args)))
(defun bzr-run-command (command &optional pre-view-hook)
"Run COMMAND at the top-level and view the result in another window.
PRE-VIEW-HOOK is an optional function to call before entering
view-mode. This is useful to set the major-mode of the result buffer,
because if you did it afterwards then it would zap view-mode."
(bzr-cleanup)
(let ((toplevel (bzr-toplevel)))
(with-current-buffer (get-buffer-create bzr-buffer)
;; prevent `shell-command' from printing output in a message
(let ((max-mini-window-height 0))
(let ((default-directory toplevel))
(shell-command command t)))
(goto-char (point-min))
(when pre-view-hook
(funcall pre-view-hook))))
(if (zerop (buffer-size (get-buffer bzr-buffer)))
(message "(bzr command finished with no output.)")
(view-buffer-other-window bzr-buffer)
;; Bury the buffer when dismissed.
(with-current-buffer (get-buffer bzr-buffer)
(setq view-exit-action #'bury-buffer))))
(defun bzr-current-file ()
(or (buffer-file-name)
(error "Don't know what file to use!")))
(defun bzr-cleanup (&optional buffer-name)
"Cleanup before executing a command.
BUFFER-NAME is the command's output buffer."
(let ((name (or buffer-name bzr-buffer)))
(when (get-buffer bzr-buffer)
(kill-buffer bzr-buffer))))
(defun bzr-toplevel ()
"Return the top-level directory of the repository."
(let ((dir (bzr-find-repository)))
(if dir
(file-name-directory dir)
(error "Can't find bzr repository top-level."))))
(defun bzr-find-repository (&optional start-directory)
"Return the enclosing \".bzr\" directory, or nil if there isn't one."
(when (and (buffer-file-name)
(file-directory-p (file-name-directory (buffer-file-name))))
(let ((dir (or start-directory
default-directory
(error "No start directory given."))))
(or (car (directory-files dir t "^\\.bzr$"))
(let ((next-dir (file-name-directory (directory-file-name dir))))
(unless (equal dir next-dir)
(bzr-find-repository next-dir)))))))
;;;; Hook setup
;;;
;;; Automaticaly enter bzr-mode when we open a file that's under bzr
;;; control, i.e. if the .bzr directory can be found.
(defun bzr-find-file-hook ()
"Enable bzr-mode if the file is inside a bzr repository."
;; Note: This function is called for every file that Emacs opens so
;; it mustn't make any mistakes.
(when (bzr-find-repository) (bzr-mode 1)))
(add-hook 'find-file-hooks 'bzr-find-file-hook)
(provide 'bzr)
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