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764 lines
31 KiB
EmacsLisp
764 lines
31 KiB
EmacsLisp
;;; vc-dispatcher.el -- generic command-dispatcher facility. -*- lexical-binding: t -*-
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;; Copyright (C) 2008-2014 Free Software Foundation, Inc.
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;; Author: FSF (see below for full credits)
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;; Maintainer: Eric S. Raymond <esr@thyrsus.com>
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;; Keywords: vc tools
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;; Package: vc
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Credits:
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;; Designed and implemented by Eric S. Raymond, originally as part of VC mode.
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;; Stefan Monnier and Dan Nicolaescu contributed substantial work on the
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;; vc-dir front end.
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;;; Commentary:
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;; Goals:
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;;
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;; There is a class of front-ending problems that Emacs might be used
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;; to address that involves selecting sets of files, or possibly
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;; directories, and passing the selection set to slave commands. The
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;; prototypical example, from which this code is derived, is talking
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;; to version-control systems.
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;;
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;; vc-dispatcher.el is written to decouple the UI issues in such front
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;; ends from their application-specific logic. It also provides a
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;; service layer for running the slave commands either synchronously
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;; or asynchronously and managing the message/error logs from the
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;; command runs.
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;;
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;; Similar UI problems can be expected to come up in applications
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;; areas other than VCSes; IDEs and document search are two obvious ones.
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;; This mode is intended to ensure that the Emacs interfaces for all such
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;; beasts are consistent and carefully designed. But even if nothing
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;; but VC ever uses it, getting the layer separation right will be
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;; a valuable thing.
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;; Dispatcher's universe:
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;;
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;; The universe consists of the file tree rooted at the current
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;; directory. The dispatcher's upper layer deduces some subset
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;; of the file tree from the state of the currently visited buffer
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;; and returns that subset, presumably to a client mode.
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;;
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;; The user may be looking at either of two different views; a buffer
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;; visiting a file, or a directory buffer generated by vc-dispatcher.
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;;
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;; The lower layer of this mode runs commands in subprocesses, either
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;; synchronously or asynchronously. Commands may be launched in one
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;; of two ways: they may be run immediately, or the calling mode can
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;; create a closure associated with a text-entry buffer, to be
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;; executed when the user types C-c to ship the buffer contents. In
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;; either case the command messages and error (if any) will remain
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;; available in a status buffer.
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;; Special behavior of dispatcher directory buffers:
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;;
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;; In dispatcher directory buffers, facilities to perform basic
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;; navigation and selection operations are provided by keymap and menu
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;; entries that dispatcher sets up itself, so they'll be uniform
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;; across all dispatcher-using client modes. Client modes are
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;; expected to append to these to provide mode-specific bindings.
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;;
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;; The standard map associates a 'state' slot (that the client mode
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;; may set) with each directory entry. The dispatcher knows nothing
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;; about the semantics of individual states, but mark and unmark commands
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;; treat all entries with the same state as the currently selected one as
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;; a unit.
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;; The interface:
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;;
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;; The main interface to the lower level is vc-do-command. This launches a
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;; command, synchronously or asynchronously, making the output available
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;; in a command log buffer. Two other functions, (vc-start-logentry) and
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;; (vc-finish-logentry), allow you to associate a command closure with an
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;; annotation buffer so that when the user confirms the comment the closure
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;; is run (with the comment as part of its context).
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;;
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;; The interface to the upper level has the two main entry points (vc-dir)
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;; and (vc-dispatcher-selection-set) and a couple of convenience functions.
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;; (vc-dir) sets up a dispatcher browsing buffer; (vc-dispatcher-selection-set)
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;; returns a selection set of files, either the marked files in a browsing
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;; buffer or the singleton set consisting of the file visited by the current
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;; buffer (when that is appropriate). It also does what is needed to ensure
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;; that on-disk files and the contents of their visiting Emacs buffers
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;; coincide.
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;;
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;; When the client mode adds a local vc-mode-line-hook to a buffer, it
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;; will be called with the buffer file name as argument whenever the
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;; dispatcher resyncs the buffer.
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;; To do:
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;;
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;; - log buffers need font-locking.
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;;
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;; General customization
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(defcustom vc-logentry-check-hook nil
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"Normal hook run by `vc-finish-logentry'.
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Use this to impose your own rules on the entry in addition to any the
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dispatcher client mode imposes itself."
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:type 'hook
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:group 'vc)
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(defcustom vc-delete-logbuf-window t
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"If non-nil, delete the log buffer and window after each logical action.
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If nil, bury that buffer instead.
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This is most useful if you have multiple windows on a frame and would like to
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preserve the setting."
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:type 'boolean
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:group 'vc)
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(defcustom vc-command-messages nil
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"If non-nil, display run messages from back-end commands."
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:type 'boolean
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:group 'vc)
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(defcustom vc-suppress-confirm nil
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"If non-nil, treat user as expert; suppress yes-no prompts on some things."
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:type 'boolean
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:group 'vc)
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;; Variables the user doesn't need to know about.
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(defvar vc-log-operation nil)
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(defvar vc-log-after-operation-hook nil)
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(defvar vc-log-fileset)
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;; In a log entry buffer, this is a local variable
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;; that points to the buffer for which it was made
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;; (either a file, or a directory buffer).
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(defvar vc-parent-buffer nil)
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(put 'vc-parent-buffer 'permanent-local t)
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(defvar vc-parent-buffer-name nil)
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(put 'vc-parent-buffer-name 'permanent-local t)
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;; Common command execution logic
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(defun vc-process-filter (p s)
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"An alternative output filter for async process P.
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One difference with the default filter is that this inserts S after markers.
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Another is that undo information is not kept."
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(let ((buffer (process-buffer p)))
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(when (buffer-live-p buffer)
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(with-current-buffer buffer
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(save-excursion
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(let ((buffer-undo-list t)
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(inhibit-read-only t))
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(goto-char (process-mark p))
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(insert s)
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(set-marker (process-mark p) (point))))))))
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(defun vc-setup-buffer (buf)
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"Prepare BUF for executing a slave command and make it current."
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(let ((camefrom (current-buffer))
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(olddir default-directory))
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(set-buffer (get-buffer-create buf))
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(kill-all-local-variables)
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(set (make-local-variable 'vc-parent-buffer) camefrom)
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(set (make-local-variable 'vc-parent-buffer-name)
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(concat " from " (buffer-name camefrom)))
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(setq default-directory olddir)
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(let ((buffer-undo-list t)
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(inhibit-read-only t))
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(erase-buffer))))
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(defvar vc-sentinel-movepoint) ;Dynamically scoped.
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(defun vc--process-sentinel (p code)
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(let ((buf (process-buffer p)))
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;; Impatient users sometime kill "slow" buffers; check liveness
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;; to avoid "error in process sentinel: Selecting deleted buffer".
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(when (buffer-live-p buf)
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(with-current-buffer buf
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(setq mode-line-process
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(let ((status (process-status p)))
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;; Leave mode-line uncluttered, normally.
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(unless (eq 'exit status)
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(format " (%s)" status))))
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(let (vc-sentinel-movepoint
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(m (process-mark p)))
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;; Normally, we want async code such as sentinels to not move point.
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(save-excursion
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(goto-char m)
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;; Each sentinel may move point and the next one should be run
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;; at that new point. We could get the same result by having
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;; each sentinel read&set process-mark, but since `cmd' needs
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;; to work both for async and sync processes, this would be
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;; difficult to achieve.
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(vc-exec-after code)
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(move-marker m (point)))
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;; But sometimes the sentinels really want to move point.
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(when vc-sentinel-movepoint
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(let ((win (get-buffer-window (current-buffer) 0)))
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(if (not win)
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(goto-char vc-sentinel-movepoint)
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(with-selected-window win
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(goto-char vc-sentinel-movepoint))))))))))
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(defun vc-set-mode-line-busy-indicator ()
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(setq mode-line-process
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(concat " " (propertize "[waiting...]"
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'face 'mode-line-emphasis
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'help-echo
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"A command is in progress in this buffer"))))
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(defun vc-exec-after (code)
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"Eval CODE when the current buffer's process is done.
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If the current buffer has no process, just evaluate CODE.
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Else, add CODE to the process' sentinel.
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CODE should be a function of no arguments."
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(let ((proc (get-buffer-process (current-buffer))))
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(cond
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;; If there's no background process, just execute the code.
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;; We used to explicitly call delete-process on exited processes,
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;; but this led to timing problems causing process output to be
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;; lost. Terminated processes get deleted automatically
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;; anyway. -- cyd
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((or (null proc) (eq (process-status proc) 'exit))
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;; Make sure we've read the process's output before going further.
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(when proc (accept-process-output proc))
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(if (functionp code) (funcall code) (eval code)))
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;; If a process is running, add CODE to the sentinel
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((eq (process-status proc) 'run)
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(vc-set-mode-line-busy-indicator)
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(letrec ((fun (lambda (p _msg)
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(remove-function (process-sentinel p) fun)
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(vc--process-sentinel p code))))
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(add-function :after (process-sentinel proc) fun)))
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(t (error "Unexpected process state"))))
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nil)
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(defmacro vc-run-delayed (&rest body)
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(declare (indent 0) (debug t))
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`(vc-exec-after (lambda () ,@body)))
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(defvar vc-post-command-functions nil
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"Hook run at the end of `vc-do-command'.
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Each function is called inside the buffer in which the command was run
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and is passed 3 arguments: the COMMAND, the FILES and the FLAGS.")
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(defvar w32-quote-process-args)
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(defun vc-delistify (filelist)
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"Smash a FILELIST into a file list string suitable for info messages."
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;; FIXME what about file names with spaces?
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(if (not filelist) "." (mapconcat 'identity filelist " ")))
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;;;###autoload
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(defun vc-do-command (buffer okstatus command file-or-list &rest flags)
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"Execute a slave command, notifying user and checking for errors.
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Output from COMMAND goes to BUFFER, or the current buffer if
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BUFFER is t. If the destination buffer is not already current,
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set it up properly and erase it. The command is considered
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successful if its exit status does not exceed OKSTATUS (if
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OKSTATUS is nil, that means to ignore error status, if it is
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`async', that means not to wait for termination of the
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subprocess; if it is t it means to ignore all execution errors).
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FILE-OR-LIST is the name of a working file; it may be a list of
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files or be nil (to execute commands that don't expect a file
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name or set of files). If an optional list of FLAGS is present,
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that is inserted into the command line before the filename.
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Return the return value of the slave command in the synchronous
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case, and the process object in the asynchronous case."
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;; FIXME: file-relative-name can return a bogus result because
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;; it doesn't look at the actual file-system to see if symlinks
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;; come into play.
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(let* ((files
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(mapcar (lambda (f) (file-relative-name (expand-file-name f)))
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(if (listp file-or-list) file-or-list (list file-or-list))))
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(full-command
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;; What we're doing here is preparing a version of the command
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;; for display in a debug-progress message. If it's fewer than
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;; 20 characters display the entire command (without trailing
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;; newline). Otherwise display the first 20 followed by an ellipsis.
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(concat (if (string= (substring command -1) "\n")
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(substring command 0 -1)
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command)
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" "
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(vc-delistify (mapcar (lambda (s) (if (> (length s) 20) (concat (substring s 0 2) "...") s)) flags))
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" " (vc-delistify files))))
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(save-current-buffer
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(unless (or (eq buffer t)
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(and (stringp buffer)
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(string= (buffer-name) buffer))
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(eq buffer (current-buffer)))
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(vc-setup-buffer buffer))
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;; If there's some previous async process still running, just kill it.
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(let ((oldproc (get-buffer-process (current-buffer))))
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;; If we wanted to wait for oldproc to finish before doing
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;; something, we'd have used vc-eval-after.
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;; Use `delete-process' rather than `kill-process' because we don't
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;; want any of its output to appear from now on.
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(when oldproc (delete-process oldproc)))
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(let ((squeezed (remq nil flags))
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(inhibit-read-only t)
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(status 0))
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(when files
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(setq squeezed (nconc squeezed files)))
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(let (;; Since some functions need to parse the output
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;; from external commands, set LC_MESSAGES to C.
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(process-environment (cons "LC_MESSAGES=C" process-environment))
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(w32-quote-process-args t))
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(if (eq okstatus 'async)
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;; Run asynchronously.
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(let ((proc
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(let ((process-connection-type nil))
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(apply 'start-file-process command (current-buffer)
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command squeezed))))
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(when vc-command-messages
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(message "Running %s in background..." full-command))
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;; Get rid of the default message insertion, in case we don't
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;; set a sentinel explicitly.
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(set-process-sentinel proc #'ignore)
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(set-process-filter proc 'vc-process-filter)
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(setq status proc)
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(when vc-command-messages
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(vc-run-delayed
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(message "Running %s in background... done" full-command))))
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;; Run synchronously
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(when vc-command-messages
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(message "Running %s in foreground..." full-command))
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(let ((buffer-undo-list t))
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(setq status (apply 'process-file command nil t nil squeezed)))
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(when (and (not (eq t okstatus))
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(or (not (integerp status))
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(and okstatus (< okstatus status))))
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(unless (eq ?\s (aref (buffer-name (current-buffer)) 0))
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(pop-to-buffer (current-buffer))
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(goto-char (point-min))
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(shrink-window-if-larger-than-buffer))
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(error "Running %s...FAILED (%s)" full-command
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(if (integerp status) (format "status %d" status) status)))
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(when vc-command-messages
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(message "Running %s...OK = %d" full-command status))))
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(vc-run-delayed
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(run-hook-with-args 'vc-post-command-functions
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command file-or-list flags))
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status))))
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(defun vc-do-async-command (buffer root command &rest args)
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"Run COMMAND asynchronously with ARGS, displaying the result.
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Send the output to BUFFER, which should be a buffer or the name
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of a buffer, which is created.
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ROOT should be the directory in which the command should be run.
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Display the buffer in some window, but don't select it."
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(let* ((dir default-directory)
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(inhibit-read-only t)
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window new-window-start)
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(setq buffer (get-buffer-create buffer))
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(if (get-buffer-process buffer)
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(error "Another VC action on %s is running" root))
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(with-current-buffer buffer
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(setq default-directory root)
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(goto-char (point-max))
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(unless (eq (point) (point-min))
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(insert " \n"))
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(setq new-window-start (point))
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(insert "Running \"" command)
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(dolist (arg args)
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(insert " " arg))
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(insert "\"...\n")
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;; Run in the original working directory.
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(let ((default-directory dir))
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(apply 'vc-do-command t 'async command nil args)))
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(setq window (display-buffer buffer))
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(if window
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(set-window-start window new-window-start))
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buffer))
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(defvar compilation-error-regexp-alist)
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(defun vc-compilation-mode (backend)
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"Setup `compilation-mode' after with the appropriate `compilation-error-regexp-alist'."
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(require 'compile)
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(let* ((error-regexp-alist
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(vc-make-backend-sym backend 'error-regexp-alist))
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(error-regexp-alist (and (boundp error-regexp-alist)
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(symbol-value error-regexp-alist))))
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(let ((compilation-error-regexp-alist error-regexp-alist))
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(compilation-mode))
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(set (make-local-variable 'compilation-error-regexp-alist)
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error-regexp-alist)))
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(declare-function vc-dir-refresh "vc-dir" ())
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(defun vc-set-async-update (process-buffer)
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"Set a `vc-exec-after' action appropriate to the current buffer.
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This action will update the current buffer after the current
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asynchronous VC command has completed. PROCESS-BUFFER is the
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buffer for the asynchronous VC process.
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If the current buffer is a VC Dir buffer, call `vc-dir-refresh'.
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If the current buffer is a Dired buffer, revert it."
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(let* ((buf (current-buffer))
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(tick (buffer-modified-tick buf)))
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(cond
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((derived-mode-p 'vc-dir-mode)
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(with-current-buffer process-buffer
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(vc-run-delayed
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(if (buffer-live-p buf)
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(with-current-buffer buf
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(vc-dir-refresh))))))
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((derived-mode-p 'dired-mode)
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(with-current-buffer process-buffer
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(vc-run-delayed
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(and (buffer-live-p buf)
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(= (buffer-modified-tick buf) tick)
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(with-current-buffer buf
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(revert-buffer)))))))))
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;; These functions are used to ensure that the view the user sees is up to date
|
||
;; even if the dispatcher client mode has messed with file contents (as in,
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;; for example, VCS keyword expansion).
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||
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||
(declare-function view-mode-exit "view" (&optional return-to-alist exit-action all-win))
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(defun vc-position-context (posn)
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"Save a bit of the text around POSN in the current buffer.
|
||
Used to help us find the corresponding position again later
|
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if markers are destroyed or corrupted."
|
||
;; A lot of this was shamelessly lifted from Sebastian Kremer's
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;; rcs.el mode.
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(list posn
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(buffer-size)
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(buffer-substring posn
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(min (point-max) (+ posn 100)))))
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(defun vc-find-position-by-context (context)
|
||
"Return the position of CONTEXT in the current buffer.
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||
If CONTEXT cannot be found, return nil."
|
||
(let ((context-string (nth 2 context)))
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||
(if (equal "" context-string)
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(point-max)
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(save-excursion
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(let ((diff (- (nth 1 context) (buffer-size))))
|
||
(when (< diff 0) (setq diff (- diff)))
|
||
(goto-char (nth 0 context))
|
||
(if (or (search-forward context-string nil t)
|
||
;; Can't use search-backward since the match may continue
|
||
;; after point.
|
||
(progn (goto-char (- (point) diff (length context-string)))
|
||
;; goto-char doesn't signal an error at
|
||
;; beginning of buffer like backward-char would
|
||
(search-forward context-string nil t)))
|
||
;; to beginning of OSTRING
|
||
(- (point) (length context-string))))))))
|
||
|
||
(defun vc-context-matches-p (posn context)
|
||
"Return t if POSN matches CONTEXT, nil otherwise."
|
||
(let* ((context-string (nth 2 context))
|
||
(len (length context-string))
|
||
(end (+ posn len)))
|
||
(if (> end (1+ (buffer-size)))
|
||
nil
|
||
(string= context-string (buffer-substring posn end)))))
|
||
|
||
(defun vc-buffer-context ()
|
||
"Return a list (POINT-CONTEXT MARK-CONTEXT REPARSE).
|
||
Used by `vc-restore-buffer-context' to later restore the context."
|
||
(let ((point-context (vc-position-context (point)))
|
||
;; Use mark-marker to avoid confusion in transient-mark-mode.
|
||
(mark-context (when (eq (marker-buffer (mark-marker)) (current-buffer))
|
||
(vc-position-context (mark-marker))))
|
||
;; Make the right thing happen in transient-mark-mode.
|
||
(mark-active nil))
|
||
(list point-context mark-context)))
|
||
|
||
(defun vc-restore-buffer-context (context)
|
||
"Restore point/mark, and reparse any affected compilation buffers.
|
||
CONTEXT is that which `vc-buffer-context' returns."
|
||
(let ((point-context (nth 0 context))
|
||
(mark-context (nth 1 context)))
|
||
;; if necessary, restore point and mark
|
||
(if (not (vc-context-matches-p (point) point-context))
|
||
(let ((new-point (vc-find-position-by-context point-context)))
|
||
(when new-point (goto-char new-point))))
|
||
(and mark-active
|
||
mark-context
|
||
(not (vc-context-matches-p (mark) mark-context))
|
||
(let ((new-mark (vc-find-position-by-context mark-context)))
|
||
(when new-mark (set-mark new-mark))))))
|
||
|
||
(defun vc-revert-buffer-internal (&optional arg no-confirm)
|
||
"Revert buffer, keeping point and mark where user expects them.
|
||
Try to be clever in the face of changes due to expanded version-control
|
||
key words. This is important for typeahead to work as expected.
|
||
ARG and NO-CONFIRM are passed on to `revert-buffer'."
|
||
(interactive "P")
|
||
(widen)
|
||
(let ((context (vc-buffer-context)))
|
||
;; Use save-excursion here, because it may be able to restore point
|
||
;; and mark properly even in cases where vc-restore-buffer-context
|
||
;; would fail. However, save-excursion might also get it wrong --
|
||
;; in this case, vc-restore-buffer-context gives it a second try.
|
||
(save-excursion
|
||
;; t means don't call normal-mode;
|
||
;; that's to preserve various minor modes.
|
||
(revert-buffer arg no-confirm t))
|
||
(vc-restore-buffer-context context)))
|
||
|
||
(defvar vc-mode-line-hook nil)
|
||
(make-variable-buffer-local 'vc-mode-line-hook)
|
||
(put 'vc-mode-line-hook 'permanent-local t)
|
||
|
||
(defvar view-old-buffer-read-only)
|
||
|
||
(defun vc-resynch-window (file &optional keep noquery reset-vc-info)
|
||
"If FILE is in the current buffer, either revert or unvisit it.
|
||
The choice between revert (to see expanded keywords) and unvisit
|
||
depends on KEEP. NOQUERY if non-nil inhibits confirmation for
|
||
reverting. NOQUERY should be t *only* if it is known the only
|
||
difference between the buffer and the file is due to
|
||
modifications by the dispatcher client code, rather than user
|
||
editing!"
|
||
(and (string= buffer-file-name file)
|
||
(if keep
|
||
(when (file-exists-p file)
|
||
(when reset-vc-info
|
||
(vc-file-clearprops file))
|
||
(vc-revert-buffer-internal t noquery)
|
||
|
||
;; VC operations might toggle the read-only state. In
|
||
;; that case we need to adjust the `view-mode' status
|
||
;; when `view-read-only' is non-nil.
|
||
(and view-read-only
|
||
(if (file-writable-p file)
|
||
(and view-mode
|
||
(let ((view-old-buffer-read-only nil))
|
||
(view-mode-exit)))
|
||
(and (not view-mode)
|
||
(not (eq (get major-mode 'mode-class) 'special))
|
||
(view-mode-enter))))
|
||
|
||
;; FIXME: Why use a hook? Why pass it buffer-file-name?
|
||
(run-hook-with-args 'vc-mode-line-hook buffer-file-name))
|
||
(kill-buffer (current-buffer)))))
|
||
|
||
(declare-function vc-dir-resynch-file "vc-dir" (&optional fname))
|
||
|
||
(defun vc-resynch-buffers-in-directory (directory &optional keep noquery reset-vc-info)
|
||
"Resync all buffers that visit files in DIRECTORY."
|
||
(dolist (buffer (buffer-list))
|
||
(let ((fname (buffer-file-name buffer)))
|
||
(when (and fname (string-prefix-p directory fname))
|
||
(with-current-buffer buffer
|
||
(vc-resynch-buffer fname keep noquery reset-vc-info))))))
|
||
|
||
(defun vc-resynch-buffer (file &optional keep noquery reset-vc-info)
|
||
"If FILE is currently visited, resynch its buffer."
|
||
(if (string= buffer-file-name file)
|
||
(vc-resynch-window file keep noquery reset-vc-info)
|
||
(if (file-directory-p file)
|
||
(vc-resynch-buffers-in-directory file keep noquery reset-vc-info)
|
||
(let ((buffer (get-file-buffer file)))
|
||
(when buffer
|
||
(with-current-buffer buffer
|
||
(vc-resynch-window file keep noquery reset-vc-info))))))
|
||
;; Try to avoid unnecessary work, a *vc-dir* buffer is only present
|
||
;; if this is true.
|
||
(when vc-dir-buffers
|
||
(vc-dir-resynch-file file)))
|
||
|
||
(defun vc-buffer-sync (&optional not-urgent)
|
||
"Make sure the current buffer and its working file are in sync.
|
||
NOT-URGENT means it is ok to continue if the user says not to save."
|
||
(when (buffer-modified-p)
|
||
(if (or vc-suppress-confirm
|
||
(y-or-n-p (format "Buffer %s modified; save it? " (buffer-name))))
|
||
(save-buffer)
|
||
(unless not-urgent
|
||
(error "Aborted")))))
|
||
|
||
;; Command closures
|
||
|
||
;; Set up key bindings for use while editing log messages
|
||
|
||
(defun vc-log-edit (fileset mode backend)
|
||
"Set up `log-edit' for use on FILE."
|
||
(setq default-directory
|
||
(buffer-local-value 'default-directory vc-parent-buffer))
|
||
(log-edit 'vc-finish-logentry
|
||
t
|
||
`((log-edit-listfun . (lambda ()
|
||
;; FIXME: Should expand the list
|
||
;; for directories.
|
||
(mapcar 'file-relative-name
|
||
',fileset)))
|
||
(log-edit-diff-function . vc-diff)
|
||
(log-edit-vc-backend . ,backend)
|
||
(vc-log-fileset . ,fileset))
|
||
nil
|
||
mode)
|
||
(set-buffer-modified-p nil)
|
||
(setq buffer-file-name nil))
|
||
|
||
(defun vc-start-logentry (files comment initial-contents msg logbuf mode action &optional after-hook backend)
|
||
"Accept a comment for an operation on FILES.
|
||
If COMMENT is nil, pop up a LOGBUF buffer, emit MSG, and set the
|
||
action on close to ACTION. If COMMENT is a string and
|
||
INITIAL-CONTENTS is non-nil, then COMMENT is used as the initial
|
||
contents of the log entry buffer. If COMMENT is a string and
|
||
INITIAL-CONTENTS is nil, do action immediately as if the user had
|
||
entered COMMENT. If COMMENT is t, also do action immediately with an
|
||
empty comment. Remember the file's buffer in `vc-parent-buffer'
|
||
\(current one if no file). Puts the log-entry buffer in major-mode
|
||
MODE, defaulting to `log-edit-mode' if MODE is nil.
|
||
AFTER-HOOK specifies the local value for `vc-log-after-operation-hook'.
|
||
BACKEND, if non-nil, specifies a VC backend for the Log Edit buffer."
|
||
(let ((parent
|
||
(if (vc-dispatcher-browsing)
|
||
;; If we are called from a directory browser, the parent buffer is
|
||
;; the current buffer.
|
||
(current-buffer)
|
||
(if (and files (equal (length files) 1))
|
||
(get-file-buffer (car files))
|
||
(current-buffer)))))
|
||
(if (and comment (not initial-contents))
|
||
(set-buffer (get-buffer-create logbuf))
|
||
(pop-to-buffer (get-buffer-create logbuf)))
|
||
(set (make-local-variable 'vc-parent-buffer) parent)
|
||
(set (make-local-variable 'vc-parent-buffer-name)
|
||
(concat " from " (buffer-name vc-parent-buffer)))
|
||
(vc-log-edit files mode backend)
|
||
(make-local-variable 'vc-log-after-operation-hook)
|
||
(when after-hook
|
||
(setq vc-log-after-operation-hook after-hook))
|
||
(setq vc-log-operation action)
|
||
(when comment
|
||
(erase-buffer)
|
||
(when (stringp comment) (insert comment)))
|
||
(if (or (not comment) initial-contents)
|
||
(message "%s Type C-c C-c when done" msg)
|
||
(vc-finish-logentry (eq comment t)))))
|
||
|
||
(declare-function vc-dir-move-to-goal-column "vc-dir" ())
|
||
;; vc-finish-logentry is typically called from a log-edit buffer (see
|
||
;; vc-start-logentry).
|
||
(defun vc-finish-logentry (&optional nocomment)
|
||
"Complete the operation implied by the current log entry.
|
||
Use the contents of the current buffer as a check-in or registration
|
||
comment. If the optional arg NOCOMMENT is non-nil, then don't check
|
||
the buffer contents as a comment."
|
||
(interactive)
|
||
;; Check and record the comment, if any.
|
||
(unless nocomment
|
||
(run-hooks 'vc-logentry-check-hook))
|
||
;; Sync parent buffer in case the user modified it while editing the comment.
|
||
;; But not if it is a vc-dir buffer.
|
||
(with-current-buffer vc-parent-buffer
|
||
(or (vc-dispatcher-browsing) (vc-buffer-sync)))
|
||
(unless vc-log-operation
|
||
(error "No log operation is pending"))
|
||
|
||
;; save the parameters held in buffer-local variables
|
||
(let ((logbuf (current-buffer))
|
||
(log-operation vc-log-operation)
|
||
;; FIXME: When coming from VC-Dir, we should check that the
|
||
;; set of selected files is still equal to vc-log-fileset,
|
||
;; to avoid surprises.
|
||
(log-fileset vc-log-fileset)
|
||
(log-entry (buffer-string))
|
||
(after-hook vc-log-after-operation-hook))
|
||
(pop-to-buffer vc-parent-buffer)
|
||
;; OK, do it to it
|
||
(save-excursion
|
||
(funcall log-operation
|
||
log-fileset
|
||
log-entry))
|
||
|
||
;; Quit windows on logbuf.
|
||
(cond
|
||
((not logbuf))
|
||
(vc-delete-logbuf-window
|
||
(quit-windows-on logbuf t (selected-frame)))
|
||
(t
|
||
(quit-windows-on logbuf nil 0)))
|
||
|
||
;; Now make sure we see the expanded headers
|
||
(when log-fileset
|
||
(mapc
|
||
(lambda (file) (vc-resynch-buffer file vc-keep-workfiles t))
|
||
log-fileset))
|
||
(when (vc-dispatcher-browsing)
|
||
(vc-dir-move-to-goal-column))
|
||
(run-hooks after-hook 'vc-finish-logentry-hook)))
|
||
|
||
(defun vc-dispatcher-browsing ()
|
||
"Are we in a directory browser buffer?"
|
||
(derived-mode-p 'vc-dir-mode))
|
||
|
||
;; These are unused.
|
||
;; (defun vc-dispatcher-in-fileset-p (fileset)
|
||
;; (let ((member nil))
|
||
;; (while (and (not member) fileset)
|
||
;; (let ((elem (pop fileset)))
|
||
;; (if (if (file-directory-p elem)
|
||
;; (eq t (compare-strings buffer-file-name nil (length elem)
|
||
;; elem nil nil))
|
||
;; (eq (current-buffer) (get-file-buffer elem)))
|
||
;; (setq member t))))
|
||
;; member))
|
||
|
||
;; (defun vc-dispatcher-selection-set (&optional observer)
|
||
;; "Deduce a set of files to which to apply an operation. Return a cons
|
||
;; cell (SELECTION . FILESET), where SELECTION is what the user chose
|
||
;; and FILES is the flist with any directories replaced by the listed files
|
||
;; within them.
|
||
|
||
;; If we're in a directory display, the fileset is the list of marked files (if
|
||
;; there is one) else the file on the current line. If not in a directory
|
||
;; display, but the current buffer visits a file, the fileset is a singleton
|
||
;; containing that file. Otherwise, throw an error."
|
||
;; (let ((selection
|
||
;; (cond
|
||
;; ;; Browsing with vc-dir
|
||
;; ((vc-dispatcher-browsing)
|
||
;; ;; If no files are marked, temporarily mark current file
|
||
;; ;; and choose on that basis (so we get subordinate files)
|
||
;; (if (not (vc-dir-marked-files))
|
||
;; (prog2
|
||
;; (vc-dir-mark-file)
|
||
;; (cons (vc-dir-marked-files) (vc-dir-marked-only-files))
|
||
;; (vc-dir-unmark-all-files t))
|
||
;; (cons (vc-dir-marked-files) (vc-dir-marked-only-files))))
|
||
;; ;; Visiting an eligible file
|
||
;; ((buffer-file-name)
|
||
;; (cons (list buffer-file-name) (list buffer-file-name)))
|
||
;; ;; No eligible file -- if there's a parent buffer, deduce from there
|
||
;; ((and vc-parent-buffer (or (buffer-file-name vc-parent-buffer)
|
||
;; (with-current-buffer vc-parent-buffer
|
||
;; (vc-dispatcher-browsing))))
|
||
;; (with-current-buffer vc-parent-buffer
|
||
;; (vc-dispatcher-selection-set)))
|
||
;; ;; No good set here, throw error
|
||
;; (t (error "No fileset is available here")))))
|
||
;; ;; We assume, in order to avoid unpleasant surprises to the user,
|
||
;; ;; that a fileset is not in good shape to be handed to the user if the
|
||
;; ;; buffers visiting the fileset don't match the on-disk contents.
|
||
;; (unless observer
|
||
;; (save-some-buffers
|
||
;; nil (lambda () (vc-dispatcher-in-fileset-p (cdr selection)))))
|
||
;; selection))
|
||
|
||
(provide 'vc-dispatcher)
|
||
|
||
;;; vc-dispatcher.el ends here
|