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1086 lines
40 KiB
EmacsLisp
1086 lines
40 KiB
EmacsLisp
;;; smerge-mode.el --- Minor mode to resolve diff3 conflicts
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;; Copyright (C) 1999, 2000, 2001, 2002, 2003,
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;; 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
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;; Keywords: tools revision-control merge diff3 cvs conflict
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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, or (at your option)
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;; 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; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; Provides a lightweight alternative to emerge/ediff.
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;; To use it, simply add to your .emacs the following lines:
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;;
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;; (autoload 'smerge-mode "smerge-mode" nil t)
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;;
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;; you can even have it turned on automatically with the following
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;; piece of code in your .emacs:
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;;
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;; (defun sm-try-smerge ()
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;; (save-excursion
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;; (goto-char (point-min))
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;; (when (re-search-forward "^<<<<<<< " nil t)
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;; (smerge-mode 1))))
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;; (add-hook 'find-file-hook 'sm-try-smerge t)
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;;; Todo:
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;; - if requested, ask the user whether he wants to call ediff right away
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;;; Code:
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(eval-when-compile (require 'cl))
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;;; The real definition comes later.
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(defvar smerge-mode)
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(defgroup smerge ()
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"Minor mode to highlight and resolve diff3 conflicts."
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:group 'tools
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:prefix "smerge-")
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(defcustom smerge-diff-buffer-name "*vc-diff*"
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"Buffer name to use for displaying diffs."
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:group 'smerge
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:type '(choice
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(const "*vc-diff*")
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(const "*cvs-diff*")
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(const "*smerge-diff*")
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string))
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(defcustom smerge-diff-switches
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(append '("-d" "-b")
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(if (listp diff-switches) diff-switches (list diff-switches)))
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"A list of strings specifying switches to be passed to diff.
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Used in `smerge-diff-base-mine' and related functions."
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:group 'smerge
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:type '(repeat string))
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(defcustom smerge-auto-leave t
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"Non-nil means to leave `smerge-mode' when the last conflict is resolved."
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:group 'smerge
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:type 'boolean)
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(defcustom smerge-auto-refine t
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"Automatically highlight changes in detail as the user visits conflicts."
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:group 'smerge
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:type 'boolean)
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(defface smerge-mine
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'((((min-colors 88) (background light))
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(:foreground "blue1"))
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(((background light))
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(:foreground "blue"))
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(((min-colors 88) (background dark))
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(:foreground "cyan1"))
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(((background dark))
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(:foreground "cyan")))
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"Face for your code."
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:group 'smerge)
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;; backward-compatibility alias
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(put 'smerge-mine-face 'face-alias 'smerge-mine)
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(defvar smerge-mine-face 'smerge-mine)
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(defface smerge-other
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'((((background light))
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(:foreground "darkgreen"))
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(((background dark))
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(:foreground "lightgreen")))
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"Face for the other code."
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:group 'smerge)
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;; backward-compatibility alias
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(put 'smerge-other-face 'face-alias 'smerge-other)
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(defvar smerge-other-face 'smerge-other)
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(defface smerge-base
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'((((min-colors 88) (background light))
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(:foreground "red1"))
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(((background light))
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(:foreground "red"))
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(((background dark))
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(:foreground "orange")))
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"Face for the base code."
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:group 'smerge)
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;; backward-compatibility alias
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(put 'smerge-base-face 'face-alias 'smerge-base)
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(defvar smerge-base-face 'smerge-base)
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(defface smerge-markers
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'((((background light))
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(:background "grey85"))
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(((background dark))
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(:background "grey30")))
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"Face for the conflict markers."
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:group 'smerge)
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;; backward-compatibility alias
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(put 'smerge-markers-face 'face-alias 'smerge-markers)
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(defvar smerge-markers-face 'smerge-markers)
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(defface smerge-refined-change
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'((t :background "yellow"))
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"Face used for char-based changes shown by `smerge-refine'."
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:group 'smerge)
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(easy-mmode-defmap smerge-basic-map
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`(("n" . smerge-next)
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("p" . smerge-prev)
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("r" . smerge-resolve)
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("a" . smerge-keep-all)
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("b" . smerge-keep-base)
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("o" . smerge-keep-other)
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("m" . smerge-keep-mine)
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("E" . smerge-ediff)
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("C" . smerge-combine-with-next)
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("R" . smerge-refine)
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("\C-m" . smerge-keep-current)
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("=" . ,(make-sparse-keymap "Diff"))
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("=<" "base-mine" . smerge-diff-base-mine)
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("=>" "base-other" . smerge-diff-base-other)
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("==" "mine-other" . smerge-diff-mine-other))
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"The base keymap for `smerge-mode'.")
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(defcustom smerge-command-prefix "\C-c^"
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"Prefix for `smerge-mode' commands."
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:group 'smerge
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:type '(choice (string "\e") (string "\C-c^") (string "") string))
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(easy-mmode-defmap smerge-mode-map
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`((,smerge-command-prefix . ,smerge-basic-map))
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"Keymap for `smerge-mode'.")
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(defvar smerge-check-cache nil)
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(make-variable-buffer-local 'smerge-check-cache)
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(defun smerge-check (n)
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(condition-case nil
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(let ((state (cons (point) (buffer-modified-tick))))
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(unless (equal (cdr smerge-check-cache) state)
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(smerge-match-conflict)
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(setq smerge-check-cache (cons (match-data) state)))
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(nth (* 2 n) (car smerge-check-cache)))
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(error nil)))
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(easy-menu-define smerge-mode-menu smerge-mode-map
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"Menu for `smerge-mode'."
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'("SMerge"
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["Next" smerge-next :help "Go to next conflict"]
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["Previous" smerge-prev :help "Go to previous conflict"]
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"--"
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["Keep All" smerge-keep-all :help "Keep all three versions"
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:active (smerge-check 1)]
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["Keep Current" smerge-keep-current :help "Use current (at point) version"
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:active (and (smerge-check 1) (> (smerge-get-current) 0))]
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"--"
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["Revert to Base" smerge-keep-base :help "Revert to base version"
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:active (smerge-check 2)]
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["Keep Other" smerge-keep-other :help "Keep `other' version"
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:active (smerge-check 3)]
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["Keep Yours" smerge-keep-mine :help "Keep your version"
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:active (smerge-check 1)]
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"--"
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["Diff Base/Mine" smerge-diff-base-mine
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:help "Diff `base' and `mine' for current conflict"
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:active (smerge-check 2)]
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["Diff Base/Other" smerge-diff-base-other
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:help "Diff `base' and `other' for current conflict"
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:active (smerge-check 2)]
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["Diff Mine/Other" smerge-diff-mine-other
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:help "Diff `mine' and `other' for current conflict"
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:active (smerge-check 1)]
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"--"
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["Invoke Ediff" smerge-ediff
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:help "Use Ediff to resolve the conflicts"
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:active (smerge-check 1)]
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["Auto Resolve" smerge-resolve
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:help "Try auto-resolution heuristics"
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:active (smerge-check 1)]
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["Combine" smerge-combine-with-next
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:help "Combine current conflict with next"
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:active (smerge-check 1)]
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))
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(easy-menu-define smerge-context-menu nil
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"Context menu for mine area in `smerge-mode'."
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'(nil
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["Keep Current" smerge-keep-current :help "Use current (at point) version"]
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["Kill Current" smerge-kill-current :help "Remove current (at point) version"]
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["Keep All" smerge-keep-all :help "Keep all three versions"]
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"---"
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["More..." (popup-menu smerge-mode-menu) :help "Show full SMerge mode menu"]
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))
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(defconst smerge-font-lock-keywords
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'((smerge-find-conflict
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(1 smerge-mine-face prepend t)
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(2 smerge-base-face prepend t)
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(3 smerge-other-face prepend t)
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;; FIXME: `keep' doesn't work right with syntactic fontification.
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(0 smerge-markers-face keep)
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(4 nil t t)
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(5 nil t t)))
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"Font lock patterns for `smerge-mode'.")
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(defconst smerge-begin-re "^<<<<<<< \\(.*\\)\n")
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(defconst smerge-end-re "^>>>>>>> .*\n")
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(defconst smerge-base-re "^||||||| .*\n")
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(defconst smerge-other-re "^=======\n")
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(defvar smerge-conflict-style nil
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"Keep track of which style of conflict is in use.
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Can be nil if the style is undecided, or else:
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- `diff3-E'
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- `diff3-A'")
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;; Compiler pacifiers
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(defvar font-lock-mode)
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(defvar font-lock-keywords)
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;;;;
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;;;; Actual code
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;;;;
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;; Define smerge-next and smerge-prev
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(easy-mmode-define-navigation smerge smerge-begin-re "conflict" nil nil
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(if smerge-auto-refine
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(condition-case nil (smerge-refine) (error nil))))
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(defconst smerge-match-names ["conflict" "mine" "base" "other"])
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(defun smerge-ensure-match (n)
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(unless (match-end n)
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(error "No `%s'" (aref smerge-match-names n))))
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(defun smerge-auto-leave ()
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(when (and smerge-auto-leave
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(save-excursion (goto-char (point-min))
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(not (re-search-forward smerge-begin-re nil t))))
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(when (and (listp buffer-undo-list) smerge-mode)
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(push (list 'apply 'smerge-mode 1) buffer-undo-list))
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(smerge-mode -1)))
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(defun smerge-keep-all ()
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"Concatenate all versions."
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(interactive)
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(smerge-match-conflict)
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(let ((mb2 (or (match-beginning 2) (point-max)))
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(me2 (or (match-end 2) (point-min))))
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(delete-region (match-end 3) (match-end 0))
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(delete-region (max me2 (match-end 1)) (match-beginning 3))
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(if (and (match-end 2) (/= (match-end 1) (match-end 3)))
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(delete-region (match-end 1) (match-beginning 2)))
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(delete-region (match-beginning 0) (min (match-beginning 1) mb2))
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(smerge-auto-leave)))
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(defun smerge-keep-n (n)
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(smerge-remove-props (match-beginning 0) (match-end 0))
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;; We used to use replace-match, but that did not preserve markers so well.
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(delete-region (match-end n) (match-end 0))
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(delete-region (match-beginning 0) (match-beginning n)))
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(defun smerge-combine-with-next ()
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"Combine the current conflict with the next one."
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;; `smerge-auto-combine' relies on the finish position (at the beginning
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;; of the closing marker).
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(interactive)
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(smerge-match-conflict)
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(let ((ends nil))
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(dolist (i '(3 2 1 0))
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(push (if (match-end i) (copy-marker (match-end i) t)) ends))
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(setq ends (apply 'vector ends))
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(goto-char (aref ends 0))
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(if (not (re-search-forward smerge-begin-re nil t))
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(error "No next conflict")
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(smerge-match-conflict)
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(let ((match-data (mapcar (lambda (m) (if m (copy-marker m)))
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(match-data))))
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;; First copy the in-between text in each alternative.
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(dolist (i '(1 2 3))
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(when (aref ends i)
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(goto-char (aref ends i))
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(insert-buffer-substring (current-buffer)
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(aref ends 0) (car match-data))))
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(delete-region (aref ends 0) (car match-data))
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;; Then move the second conflict's alternatives into the first.
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(dolist (i '(1 2 3))
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(set-match-data match-data)
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(when (and (aref ends i) (match-end i))
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(goto-char (aref ends i))
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(insert-buffer-substring (current-buffer)
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(match-beginning i) (match-end i))))
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(delete-region (car match-data) (cadr match-data))
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;; Free the markers.
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(dolist (m match-data) (if m (move-marker m nil)))
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(mapc (lambda (m) (if m (move-marker m nil))) ends)))))
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(defvar smerge-auto-combine-max-separation 2
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"Max number of lines between conflicts that should be combined.")
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(defun smerge-auto-combine ()
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"Automatically combine conflicts that are near each other."
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(interactive)
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(save-excursion
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(goto-char (point-min))
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(while (smerge-find-conflict)
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;; 2 is 1 (default) + 1 (the begin markers).
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(while (save-excursion
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(smerge-find-conflict
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(line-beginning-position
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(+ 2 smerge-auto-combine-max-separation))))
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(forward-line -1) ;Go back inside the conflict.
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(smerge-combine-with-next)
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(forward-line 1) ;Move past the end of the conflict.
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))))
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(defvar smerge-resolve-function
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(lambda () (error "Don't know how to resolve"))
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"Mode-specific merge function.
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The function is called with zero or one argument (non-nil if the resolution
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function should only apply safe heuristics) and with the match data set
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according to `smerge-match-conflict'.")
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(add-to-list 'debug-ignored-errors "Don't know how to resolve")
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(defvar smerge-text-properties
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`(help-echo "merge conflict: mouse-3 shows a menu"
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;; mouse-face highlight
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keymap (keymap (down-mouse-3 . smerge-popup-context-menu))))
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(defun smerge-remove-props (beg end)
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(remove-overlays beg end 'smerge 'refine)
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(remove-overlays beg end 'smerge 'conflict)
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;; Now that we use overlays rather than text-properties, this function
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;; does not cause refontification any more. It can be seen very clearly
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;; in buffers where jit-lock-contextually is not t, in which case deleting
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;; the "<<<<<<< foobar" leading line leaves the rest of the conflict
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;; highlighted as if it were still a valid conflict. Note that in many
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;; important cases (such as the previous example) we're actually called
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;; during font-locking so inhibit-modification-hooks is non-nil, so we
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;; can't just modify the buffer and expect font-lock to be triggered as in:
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;; (put-text-property beg end 'smerge-force-highlighting nil)
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(let ((modified (buffer-modified-p)))
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(remove-text-properties beg end '(fontified nil))
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(restore-buffer-modified-p modified)))
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(defun smerge-popup-context-menu (event)
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"Pop up the Smerge mode context menu under mouse."
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(interactive "e")
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(if (and smerge-mode
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(save-excursion (posn-set-point (event-end event)) (smerge-check 1)))
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(progn
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(posn-set-point (event-end event))
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(smerge-match-conflict)
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(let ((i (smerge-get-current))
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o)
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(if (<= i 0)
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;; Out of range
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(popup-menu smerge-mode-menu)
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;; Install overlay.
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(setq o (make-overlay (match-beginning i) (match-end i)))
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(unwind-protect
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(progn
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(overlay-put o 'face 'highlight)
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(sit-for 0) ;Display the new highlighting.
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(popup-menu smerge-context-menu))
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;; Delete overlay.
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(delete-overlay o)))))
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;; There's no conflict at point, the text-props are just obsolete.
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(save-excursion
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(let ((beg (re-search-backward smerge-end-re nil t))
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(end (re-search-forward smerge-begin-re nil t)))
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(smerge-remove-props (or beg (point-min)) (or end (point-max)))
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(push event unread-command-events)))))
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(defun smerge-resolve (&optional safe)
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"Resolve the conflict at point intelligently.
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This relies on mode-specific knowledge and thus only works in
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some major modes. Uses `smerge-resolve-function' to do the actual work."
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(interactive)
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(smerge-match-conflict)
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(smerge-remove-props (match-beginning 0) (match-end 0))
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(cond
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;; Trivial diff3 -A non-conflicts.
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((and (eq (match-end 1) (match-end 3))
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(eq (match-beginning 1) (match-beginning 3)))
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(smerge-keep-n 3))
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;; Mode-specific conflict resolution.
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((condition-case nil
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(atomic-change-group
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(if safe
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(funcall smerge-resolve-function safe)
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(funcall smerge-resolve-function))
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t)
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(error nil))
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;; Nothing to do: the resolution function has done it already.
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nil)
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;; FIXME: Add "if [ diff -b MINE OTHER ]; then select OTHER; fi"
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((and (match-end 2)
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;; FIXME: Add "diff -b BASE MINE | patch OTHER".
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;; FIXME: Add "diff -b BASE OTHER | patch MINE".
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nil)
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)
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((and (not (match-end 2))
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;; FIXME: Add "diff -b"-based refinement.
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nil)
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)
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(t
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(error "Don't know how to resolve")))
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(smerge-auto-leave))
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(defun smerge-resolve-all ()
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"Perform automatic resolution on all conflicts."
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(interactive)
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(save-excursion
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(goto-char (point-min))
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(while (re-search-forward smerge-begin-re nil t)
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(condition-case nil
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(progn
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(smerge-match-conflict)
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(smerge-resolve 'safe))
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(error nil)))))
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(defun smerge-batch-resolve ()
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;; command-line-args-left is what is left of the command line.
|
|
(if (not noninteractive)
|
|
(error "`smerge-batch-resolve' is to be used only with -batch"))
|
|
(while command-line-args-left
|
|
(let ((file (pop command-line-args-left)))
|
|
(if (string-match "\\.rej\\'" file)
|
|
;; .rej files should never contain diff3 markers, on the other hand,
|
|
;; in Arch, .rej files are sometimes used to indicate that the
|
|
;; main file has diff3 markers. So you can pass **/*.rej and
|
|
;; it will DTRT.
|
|
(setq file (substring file 0 (match-beginning 0))))
|
|
(message "Resolving conflicts in %s..." file)
|
|
(when (file-readable-p file)
|
|
(with-current-buffer (find-file-noselect file)
|
|
(smerge-resolve-all)
|
|
(save-buffer)
|
|
(kill-buffer (current-buffer)))))))
|
|
|
|
(defun smerge-keep-base ()
|
|
"Revert to the base version."
|
|
(interactive)
|
|
(smerge-match-conflict)
|
|
(smerge-ensure-match 2)
|
|
(smerge-keep-n 2)
|
|
(smerge-auto-leave))
|
|
|
|
(defun smerge-keep-other ()
|
|
"Use \"other\" version."
|
|
(interactive)
|
|
(smerge-match-conflict)
|
|
;;(smerge-ensure-match 3)
|
|
(smerge-keep-n 3)
|
|
(smerge-auto-leave))
|
|
|
|
(defun smerge-keep-mine ()
|
|
"Keep your version."
|
|
(interactive)
|
|
(smerge-match-conflict)
|
|
;;(smerge-ensure-match 1)
|
|
(smerge-keep-n 1)
|
|
(smerge-auto-leave))
|
|
|
|
(defun smerge-get-current ()
|
|
(let ((i 3))
|
|
(while (or (not (match-end i))
|
|
(< (point) (match-beginning i))
|
|
(>= (point) (match-end i)))
|
|
(decf i))
|
|
i))
|
|
|
|
(defun smerge-keep-current ()
|
|
"Use the current (under the cursor) version."
|
|
(interactive)
|
|
(smerge-match-conflict)
|
|
(let ((i (smerge-get-current)))
|
|
(if (<= i 0) (error "Not inside a version")
|
|
(smerge-keep-n i)
|
|
(smerge-auto-leave))))
|
|
|
|
(defun smerge-kill-current ()
|
|
"Remove the current (under the cursor) version."
|
|
(interactive)
|
|
(smerge-match-conflict)
|
|
(let ((i (smerge-get-current)))
|
|
(if (<= i 0) (error "Not inside a version")
|
|
(let ((left nil))
|
|
(dolist (n '(3 2 1))
|
|
(if (and (match-end n) (/= (match-end n) (match-end i)))
|
|
(push n left)))
|
|
(if (and (cdr left)
|
|
(/= (match-end (car left)) (match-end (cadr left))))
|
|
(ding) ;We don't know how to do that.
|
|
(smerge-keep-n (car left))
|
|
(smerge-auto-leave))))))
|
|
|
|
(defun smerge-diff-base-mine ()
|
|
"Diff 'base' and 'mine' version in current conflict region."
|
|
(interactive)
|
|
(smerge-diff 2 1))
|
|
|
|
(defun smerge-diff-base-other ()
|
|
"Diff 'base' and 'other' version in current conflict region."
|
|
(interactive)
|
|
(smerge-diff 2 3))
|
|
|
|
(defun smerge-diff-mine-other ()
|
|
"Diff 'mine' and 'other' version in current conflict region."
|
|
(interactive)
|
|
(smerge-diff 1 3))
|
|
|
|
(defun smerge-match-conflict ()
|
|
"Get info about the conflict. Puts the info in the `match-data'.
|
|
The submatches contain:
|
|
0: the whole conflict.
|
|
1: your code.
|
|
2: the base code.
|
|
3: other code.
|
|
An error is raised if not inside a conflict."
|
|
(save-excursion
|
|
(condition-case nil
|
|
(let* ((orig-point (point))
|
|
|
|
(_ (forward-line 1))
|
|
(_ (re-search-backward smerge-begin-re))
|
|
|
|
(start (match-beginning 0))
|
|
(mine-start (match-end 0))
|
|
(filename (or (match-string 1) ""))
|
|
|
|
(_ (re-search-forward smerge-end-re))
|
|
(_ (assert (< orig-point (match-end 0))))
|
|
|
|
(other-end (match-beginning 0))
|
|
(end (match-end 0))
|
|
|
|
(_ (re-search-backward smerge-other-re start))
|
|
|
|
(mine-end (match-beginning 0))
|
|
(other-start (match-end 0))
|
|
|
|
base-start base-end)
|
|
|
|
;; handle the various conflict styles
|
|
(cond
|
|
((save-excursion
|
|
(goto-char mine-start)
|
|
(re-search-forward smerge-begin-re end t))
|
|
;; There's a nested conflict and we're after the the beginning
|
|
;; of the outer one but before the beginning of the inner one.
|
|
;; Of course, maybe this is not a nested conflict but in that
|
|
;; case it can only be something nastier that we don't know how
|
|
;; to handle, so may as well arbitrarily decide to treat it as
|
|
;; a nested conflict. --Stef
|
|
(error "There is a nested conflict"))
|
|
|
|
((re-search-backward smerge-base-re start t)
|
|
;; a 3-parts conflict
|
|
(set (make-local-variable 'smerge-conflict-style) 'diff3-A)
|
|
(setq base-end mine-end)
|
|
(setq mine-end (match-beginning 0))
|
|
(setq base-start (match-end 0)))
|
|
|
|
((string= filename (file-name-nondirectory
|
|
(or buffer-file-name "")))
|
|
;; a 2-parts conflict
|
|
(set (make-local-variable 'smerge-conflict-style) 'diff3-E))
|
|
|
|
((and (not base-start)
|
|
(or (eq smerge-conflict-style 'diff3-A)
|
|
(equal filename "ANCESTOR")
|
|
(string-match "\\`[.0-9]+\\'" filename)))
|
|
;; a same-diff conflict
|
|
(setq base-start mine-start)
|
|
(setq base-end mine-end)
|
|
(setq mine-start other-start)
|
|
(setq mine-end other-end)))
|
|
|
|
(store-match-data (list start end
|
|
mine-start mine-end
|
|
base-start base-end
|
|
other-start other-end
|
|
(when base-start (1- base-start)) base-start
|
|
(1- other-start) other-start))
|
|
t)
|
|
(search-failed (error "Point not in conflict region")))))
|
|
|
|
(add-to-list 'debug-ignored-errors "Point not in conflict region")
|
|
|
|
(defun smerge-conflict-overlay (pos)
|
|
"Return the conflict overlay at POS if any."
|
|
(let ((ols (overlays-at pos))
|
|
conflict)
|
|
(dolist (ol ols)
|
|
(if (and (eq (overlay-get ol 'smerge) 'conflict)
|
|
(> (overlay-end ol) pos))
|
|
(setq conflict ol)))
|
|
conflict))
|
|
|
|
(defun smerge-find-conflict (&optional limit)
|
|
"Find and match a conflict region. Intended as a font-lock MATCHER.
|
|
The submatches are the same as in `smerge-match-conflict'.
|
|
Returns non-nil if a match is found between point and LIMIT.
|
|
Point is moved to the end of the conflict."
|
|
(let ((found nil)
|
|
(pos (point))
|
|
conflict)
|
|
;; First check to see if point is already inside a conflict, using
|
|
;; the conflict overlays.
|
|
(while (and (not found) (setq conflict (smerge-conflict-overlay pos)))
|
|
;; Check the overlay's validity and kill it if it's out of date.
|
|
(condition-case nil
|
|
(progn
|
|
(goto-char (overlay-start conflict))
|
|
(smerge-match-conflict)
|
|
(goto-char (match-end 0))
|
|
(if (<= (point) pos)
|
|
(error "Matching backward!")
|
|
(setq found t)))
|
|
(error (smerge-remove-props
|
|
(overlay-start conflict) (overlay-end conflict))
|
|
(goto-char pos))))
|
|
;; If we're not already inside a conflict, look for the next conflict
|
|
;; and add/update its overlay.
|
|
(while (and (not found) (re-search-forward smerge-begin-re limit t))
|
|
(condition-case nil
|
|
(progn
|
|
(smerge-match-conflict)
|
|
(goto-char (match-end 0))
|
|
(let ((conflict (smerge-conflict-overlay (1- (point)))))
|
|
(if conflict
|
|
;; Update its location, just in case it got messed up.
|
|
(move-overlay conflict (match-beginning 0) (match-end 0))
|
|
(setq conflict (make-overlay (match-beginning 0) (match-end 0)
|
|
nil 'front-advance nil))
|
|
(overlay-put conflict 'evaporate t)
|
|
(overlay-put conflict 'smerge 'conflict)
|
|
(let ((props smerge-text-properties))
|
|
(while props
|
|
(overlay-put conflict (pop props) (pop props))))))
|
|
(setq found t))
|
|
(error nil)))
|
|
found))
|
|
|
|
;;; Refined change highlighting
|
|
|
|
(defvar smerge-refine-forward-function 'smerge-refine-forward
|
|
"Function used to determine an \"atomic\" element.
|
|
You can set it to `forward-char' to get char-level granularity.
|
|
Its behavior has mainly two restrictions:
|
|
- if this function encounters a newline, it's important that it stops right
|
|
after the newline.
|
|
This only matters if `smerge-refine-ignore-whitespace' is nil.
|
|
- it needs to be unaffected by changes performed by the `preproc' argument
|
|
to `smerge-refine-subst'.
|
|
This only matters if `smerge-refine-weight-hack' is nil.")
|
|
|
|
(defvar smerge-refine-ignore-whitespace t
|
|
"If non-nil,Indicate that smerge-refine should try to ignore change in whitespace.")
|
|
|
|
(defvar smerge-refine-weight-hack t
|
|
"If non-nil, pass to diff as many lines as there are chars in the region.
|
|
I.e. each atomic element (e.g. word) will be copied as many times (on different
|
|
lines) as it has chars. This has 2 advantages:
|
|
- if `diff' tries to minimize the number *lines* (rather than chars)
|
|
added/removed, this adjust the weights so that adding/removing long
|
|
symbols is considered correspondingly more costly.
|
|
- `smerge-refine-forward-function' only needs to be called when chopping up
|
|
the regions, and `forward-char' can be used afterwards.
|
|
It has the following disadvantages:
|
|
- cannot use `diff -w' because the weighting causes added spaces in a line
|
|
to be represented as added copies of some line, so `diff -w' can't do the
|
|
right thing any more.
|
|
- may in degenerate cases take a 1KB input region and turn it into a 1MB
|
|
file to pass to diff.")
|
|
|
|
(defun smerge-refine-forward (n)
|
|
(let ((case-fold-search nil)
|
|
(re "[[:upper:]]?[[:lower:]]+\\|[[:upper:]]+\\|[[:digit:]]+\\|.\\|\n"))
|
|
(when (and smerge-refine-ignore-whitespace
|
|
;; smerge-refine-weight-hack causes additional spaces to
|
|
;; appear as additional lines as well, so even if diff ignore
|
|
;; whitespace changes, it'll report added/removed lines :-(
|
|
(not smerge-refine-weight-hack))
|
|
(setq re (concat "[ \t]*\\(?:" re "\\)")))
|
|
(dotimes (i n)
|
|
(unless (looking-at re) (error "Smerge refine internal error"))
|
|
(goto-char (match-end 0)))))
|
|
|
|
(defun smerge-refine-chopup-region (beg end file &optional preproc)
|
|
"Chopup the region into small elements, one per line.
|
|
Save the result into FILE.
|
|
If non-nil, PREPROC is called with no argument in a buffer that contains
|
|
a copy of the text, just before chopping it up. It can be used to replace
|
|
chars to try and eliminate some spurious differences."
|
|
;; We used to chop up char-by-char rather than word-by-word like ediff
|
|
;; does. It had the benefit of simplicity and very fine results, but it
|
|
;; often suffered from problem that diff would find correlations where
|
|
;; there aren't any, so the resulting "change" didn't make much sense.
|
|
;; You can still get this behavior by setting
|
|
;; `smerge-refine-forward-function' to `forward-char'.
|
|
(let ((buf (current-buffer)))
|
|
(with-temp-buffer
|
|
(insert-buffer-substring buf beg end)
|
|
(when preproc (goto-char (point-min)) (funcall preproc))
|
|
(when smerge-refine-ignore-whitespace
|
|
;; It doesn't make much of a difference for diff-fine-highlight
|
|
;; because we still have the _/+/</>/! prefix anyway. Can still be
|
|
;; useful in other circumstances.
|
|
(subst-char-in-region (point-min) (point-max) ?\n ?\s))
|
|
(goto-char (point-min))
|
|
(while (not (eobp))
|
|
(funcall smerge-refine-forward-function 1)
|
|
(let ((s (if (prog2 (forward-char -1) (bolp) (forward-char 1))
|
|
nil
|
|
(buffer-substring (line-beginning-position) (point)))))
|
|
;; We add \n after each char except after \n, so we get
|
|
;; one line per text char, where each line contains
|
|
;; just one char, except for \n chars which are
|
|
;; represented by the empty line.
|
|
(unless (eq (char-before) ?\n) (insert ?\n))
|
|
;; HACK ALERT!!
|
|
(if smerge-refine-weight-hack
|
|
(dotimes (i (1- (length s))) (insert s "\n")))))
|
|
(unless (bolp) (error "Smerge refine internal error"))
|
|
(let ((coding-system-for-write 'emacs-mule))
|
|
(write-region (point-min) (point-max) file nil 'nomessage)))))
|
|
|
|
(defun smerge-refine-highlight-change (buf beg match-num1 match-num2 props)
|
|
(with-current-buffer buf
|
|
(goto-char beg)
|
|
(let* ((startline (- (string-to-number match-num1) 1))
|
|
(beg (progn (funcall (if smerge-refine-weight-hack
|
|
'forward-char
|
|
smerge-refine-forward-function)
|
|
startline)
|
|
(point)))
|
|
(end (progn (funcall (if smerge-refine-weight-hack
|
|
'forward-char
|
|
smerge-refine-forward-function)
|
|
(if match-num2
|
|
(- (string-to-number match-num2)
|
|
startline)
|
|
1))
|
|
(point))))
|
|
(when smerge-refine-ignore-whitespace
|
|
(skip-chars-backward " \t\n" beg) (setq end (point))
|
|
(goto-char beg)
|
|
(skip-chars-forward " \t\n" end) (setq beg (point)))
|
|
(when (> end beg)
|
|
(let ((ol (make-overlay
|
|
beg end nil
|
|
;; Make them tend to shrink rather than spread when editing.
|
|
'front-advance nil)))
|
|
(overlay-put ol 'evaporate t)
|
|
(dolist (x props) (overlay-put ol (car x) (cdr x)))
|
|
ol)))))
|
|
|
|
(defun smerge-refine-subst (beg1 end1 beg2 end2 props &optional preproc)
|
|
"Show fine differences in the two regions BEG1..END1 and BEG2..END2.
|
|
PROPS is an alist of properties to put (via overlays) on the changes.
|
|
If non-nil, PREPROC is called with no argument in a buffer that contains
|
|
a copy of a region, just before preparing it to for `diff'. It can be used to
|
|
replace chars to try and eliminate some spurious differences."
|
|
(let* ((buf (current-buffer))
|
|
(pos (point))
|
|
(file1 (make-temp-file "diff1"))
|
|
(file2 (make-temp-file "diff2")))
|
|
;; Chop up regions into smaller elements and save into files.
|
|
(smerge-refine-chopup-region beg1 end1 file1 preproc)
|
|
(smerge-refine-chopup-region beg2 end2 file2 preproc)
|
|
|
|
;; Call diff on those files.
|
|
(unwind-protect
|
|
(with-temp-buffer
|
|
(let ((coding-system-for-read 'emacs-mule))
|
|
(call-process diff-command nil t nil
|
|
(if (and smerge-refine-ignore-whitespace
|
|
(not smerge-refine-weight-hack))
|
|
;; Pass -a so diff treats it as a text file even
|
|
;; if it contains \0 and such.
|
|
;; Pass -d so as to get the smallest change, but
|
|
;; also and more importantly because otherwise it
|
|
;; may happen that diff doesn't behave like
|
|
;; smerge-refine-weight-hack expects it to.
|
|
;; See http://thread.gmane.org/gmane.emacs.devel/82685.
|
|
"-awd" "-ad")
|
|
file1 file2))
|
|
;; Process diff's output.
|
|
(goto-char (point-min))
|
|
(let ((last1 nil)
|
|
(last2 nil))
|
|
(while (not (eobp))
|
|
(if (not (looking-at "\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)?\\([acd]\\)\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)?$"))
|
|
(error "Unexpected patch hunk header: %s"
|
|
(buffer-substring (point) (line-end-position))))
|
|
(let ((op (char-after (match-beginning 3)))
|
|
(m1 (match-string 1))
|
|
(m2 (match-string 2))
|
|
(m4 (match-string 4))
|
|
(m5 (match-string 5)))
|
|
(when (memq op '(?d ?c))
|
|
(setq last1
|
|
(smerge-refine-highlight-change buf beg1 m1 m2 props)))
|
|
(when (memq op '(?a ?c))
|
|
(setq last2
|
|
(smerge-refine-highlight-change buf beg2 m4 m5 props))))
|
|
(forward-line 1) ;Skip hunk header.
|
|
(and (re-search-forward "^[0-9]" nil 'move) ;Skip hunk body.
|
|
(goto-char (match-beginning 0))))
|
|
;; (assert (or (null last1) (< (overlay-start last1) end1)))
|
|
;; (assert (or (null last2) (< (overlay-start last2) end2)))
|
|
(if smerge-refine-weight-hack
|
|
(progn
|
|
;; (assert (or (null last1) (<= (overlay-end last1) end1)))
|
|
;; (assert (or (null last2) (<= (overlay-end last2) end2)))
|
|
)
|
|
;; smerge-refine-forward-function when calling in chopup may
|
|
;; have stopped because it bumped into EOB whereas in
|
|
;; smerge-refine-weight-hack it may go a bit further.
|
|
(if (and last1 (> (overlay-end last1) end1))
|
|
(move-overlay last1 (overlay-start last1) end1))
|
|
(if (and last2 (> (overlay-end last2) end2))
|
|
(move-overlay last2 (overlay-start last2) end2))
|
|
)))
|
|
(goto-char pos)
|
|
(delete-file file1)
|
|
(delete-file file2))))
|
|
|
|
(defun smerge-refine ()
|
|
"Highlight the parts of the conflict that are different."
|
|
(interactive)
|
|
;; FIXME: make it work with 3-way conflicts.
|
|
(smerge-match-conflict)
|
|
(remove-overlays (match-beginning 0) (match-end 0) 'smerge 'refine)
|
|
(smerge-ensure-match 1)
|
|
(smerge-ensure-match 3)
|
|
;; Match 1 and 3 may be one and the same in case of trivial diff3 -A conflict.
|
|
(let ((n1 (if (eq (match-end 1) (match-end 3)) 2 1)))
|
|
(smerge-refine-subst (match-beginning n1) (match-end n1)
|
|
(match-beginning 3) (match-end 3)
|
|
'((smerge . refine)
|
|
(face . smerge-refined-change)))))
|
|
|
|
(defun smerge-diff (n1 n2)
|
|
(smerge-match-conflict)
|
|
(smerge-ensure-match n1)
|
|
(smerge-ensure-match n2)
|
|
(let ((name1 (aref smerge-match-names n1))
|
|
(name2 (aref smerge-match-names n2))
|
|
;; Read them before the match-data gets clobbered.
|
|
(beg1 (match-beginning n1))
|
|
(end1 (match-end n1))
|
|
(beg2 (match-beginning n2))
|
|
(end2 (match-end n2))
|
|
(file1 (make-temp-file "smerge1"))
|
|
(file2 (make-temp-file "smerge2"))
|
|
(dir default-directory)
|
|
(file (if buffer-file-name (file-relative-name buffer-file-name)))
|
|
;; We would want to use `emacs-mule-unix' for read&write, but we
|
|
;; bump into problems with the coding-system used by diff to write
|
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;; the file names and the time stamps in the header.
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;; `buffer-file-coding-system' is not always correct either, but if
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;; the OS/user uses only one coding-system, then it works.
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(coding-system-for-read buffer-file-coding-system))
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(write-region beg1 end1 file1 nil 'nomessage)
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(write-region beg2 end2 file2 nil 'nomessage)
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|
(unwind-protect
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(with-current-buffer (get-buffer-create smerge-diff-buffer-name)
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(setq default-directory dir)
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|
(let ((inhibit-read-only t))
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|
(erase-buffer)
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|
(let ((status
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|
(apply 'call-process diff-command nil t nil
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|
(append smerge-diff-switches
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|
(list "-L" (concat name1 "/" file)
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|
"-L" (concat name2 "/" file)
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|
file1 file2)))))
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|
(if (eq status 0) (insert "No differences found.\n"))))
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|
(goto-char (point-min))
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|
(diff-mode)
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(display-buffer (current-buffer) t))
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(delete-file file1)
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|
(delete-file file2))))
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|
|
|
;; compiler pacifiers
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|
(defvar smerge-ediff-windows)
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|
(defvar smerge-ediff-buf)
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|
(defvar ediff-buffer-A)
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|
(defvar ediff-buffer-B)
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|
(defvar ediff-buffer-C)
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|
(defvar ediff-ancestor-buffer)
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|
(defvar ediff-quit-hook)
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|
(declare-function ediff-cleanup-mess "ediff-util" nil)
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|
|
|
;;;###autoload
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|
(defun smerge-ediff (&optional name-mine name-other name-base)
|
|
"Invoke ediff to resolve the conflicts.
|
|
NAME-MINE, NAME-OTHER, and NAME-BASE, if non-nil, are used for the
|
|
buffer names."
|
|
(interactive)
|
|
(let* ((buf (current-buffer))
|
|
(mode major-mode)
|
|
;;(ediff-default-variant 'default-B)
|
|
(config (current-window-configuration))
|
|
(filename (file-name-nondirectory buffer-file-name))
|
|
(mine (generate-new-buffer
|
|
(or name-mine (concat "*" filename " MINE*"))))
|
|
(other (generate-new-buffer
|
|
(or name-other (concat "*" filename " OTHER*"))))
|
|
base)
|
|
(with-current-buffer mine
|
|
(buffer-disable-undo)
|
|
(insert-buffer-substring buf)
|
|
(goto-char (point-min))
|
|
(while (smerge-find-conflict)
|
|
(when (match-beginning 2) (setq base t))
|
|
(smerge-keep-n 1))
|
|
(buffer-enable-undo)
|
|
(set-buffer-modified-p nil)
|
|
(funcall mode))
|
|
|
|
(with-current-buffer other
|
|
(buffer-disable-undo)
|
|
(insert-buffer-substring buf)
|
|
(goto-char (point-min))
|
|
(while (smerge-find-conflict)
|
|
(smerge-keep-n 3))
|
|
(buffer-enable-undo)
|
|
(set-buffer-modified-p nil)
|
|
(funcall mode))
|
|
|
|
(when base
|
|
(setq base (generate-new-buffer
|
|
(or name-base (concat "*" filename " BASE*"))))
|
|
(with-current-buffer base
|
|
(buffer-disable-undo)
|
|
(insert-buffer-substring buf)
|
|
(goto-char (point-min))
|
|
(while (smerge-find-conflict)
|
|
(if (match-end 2)
|
|
(smerge-keep-n 2)
|
|
(delete-region (match-beginning 0) (match-end 0))))
|
|
(buffer-enable-undo)
|
|
(set-buffer-modified-p nil)
|
|
(funcall mode)))
|
|
|
|
;; the rest of the code is inspired from vc.el
|
|
;; Fire up ediff.
|
|
(set-buffer
|
|
(if base
|
|
(ediff-merge-buffers-with-ancestor mine other base)
|
|
;; nil 'ediff-merge-revisions-with-ancestor buffer-file-name)
|
|
(ediff-merge-buffers mine other)))
|
|
;; nil 'ediff-merge-revisions buffer-file-name)))
|
|
|
|
;; Ediff is now set up, and we are in the control buffer.
|
|
;; Do a few further adjustments and take precautions for exit.
|
|
(set (make-local-variable 'smerge-ediff-windows) config)
|
|
(set (make-local-variable 'smerge-ediff-buf) buf)
|
|
(set (make-local-variable 'ediff-quit-hook)
|
|
(lambda ()
|
|
(let ((buffer-A ediff-buffer-A)
|
|
(buffer-B ediff-buffer-B)
|
|
(buffer-C ediff-buffer-C)
|
|
(buffer-Ancestor ediff-ancestor-buffer)
|
|
(buf smerge-ediff-buf)
|
|
(windows smerge-ediff-windows))
|
|
(ediff-cleanup-mess)
|
|
(with-current-buffer buf
|
|
(erase-buffer)
|
|
(insert-buffer-substring buffer-C)
|
|
(kill-buffer buffer-A)
|
|
(kill-buffer buffer-B)
|
|
(kill-buffer buffer-C)
|
|
(when (bufferp buffer-Ancestor) (kill-buffer buffer-Ancestor))
|
|
(set-window-configuration windows)
|
|
(message "Conflict resolution finished; you may save the buffer")))))
|
|
(message "Please resolve conflicts now; exit ediff when done")))
|
|
|
|
(defun smerge-makeup-conflict (pt1 pt2 pt3 &optional pt4)
|
|
"Insert diff3 markers to make a new conflict.
|
|
Uses point and mark for 2 of the relevant positions and previous marks
|
|
for the other ones.
|
|
By default, makes up a 2-way conflict,
|
|
with a \\[universal-argument] prefix, makes up a 3-way conflict."
|
|
(interactive
|
|
(list (point)
|
|
(mark)
|
|
(progn (pop-mark) (mark))
|
|
(when current-prefix-arg (pop-mark) (mark))))
|
|
;; Start from the end so as to avoid problems with pos-changes.
|
|
(destructuring-bind (pt1 pt2 pt3 &optional pt4)
|
|
(sort (list* pt1 pt2 pt3 (if pt4 (list pt4))) '>=)
|
|
(goto-char pt1) (beginning-of-line)
|
|
(insert ">>>>>>> OTHER\n")
|
|
(goto-char pt2) (beginning-of-line)
|
|
(insert "=======\n")
|
|
(goto-char pt3) (beginning-of-line)
|
|
(when pt4
|
|
(insert "||||||| BASE\n")
|
|
(goto-char pt4) (beginning-of-line))
|
|
(insert "<<<<<<< MINE\n"))
|
|
(if smerge-mode nil (smerge-mode 1))
|
|
(smerge-refine))
|
|
|
|
|
|
(defconst smerge-parsep-re
|
|
(concat smerge-begin-re "\\|" smerge-end-re "\\|"
|
|
smerge-base-re "\\|" smerge-other-re "\\|"))
|
|
|
|
;;;###autoload
|
|
(define-minor-mode smerge-mode
|
|
"Minor mode to simplify editing output from the diff3 program.
|
|
\\{smerge-mode-map}"
|
|
:group 'smerge :lighter " SMerge"
|
|
(when (and (boundp 'font-lock-mode) font-lock-mode)
|
|
(save-excursion
|
|
(if smerge-mode
|
|
(font-lock-add-keywords nil smerge-font-lock-keywords 'append)
|
|
(font-lock-remove-keywords nil smerge-font-lock-keywords))
|
|
(goto-char (point-min))
|
|
(while (smerge-find-conflict)
|
|
(save-excursion
|
|
(font-lock-fontify-region (match-beginning 0) (match-end 0) nil)))))
|
|
(if (string-match (regexp-quote smerge-parsep-re) paragraph-separate)
|
|
(unless smerge-mode
|
|
(set (make-local-variable 'paragraph-separate)
|
|
(replace-match "" t t paragraph-separate)))
|
|
(when smerge-mode
|
|
(set (make-local-variable 'paragraph-separate)
|
|
(concat smerge-parsep-re paragraph-separate))))
|
|
(unless smerge-mode
|
|
(smerge-remove-props (point-min) (point-max))))
|
|
|
|
;;;###autoload
|
|
(defun smerge-start-session ()
|
|
"Turn on `smerge-mode' and move point to first conflict marker.
|
|
If no conflict maker is found, turn off `smerge-mode'."
|
|
(smerge-mode 1)
|
|
(condition-case nil
|
|
(smerge-next)
|
|
(error (smerge-auto-leave))))
|
|
|
|
(provide 'smerge-mode)
|
|
|
|
;; arch-tag: 605c8d1e-e43d-4943-a6f3-1bcc4333e690
|
|
;;; smerge-mode.el ends here
|