;;; smerge-mode.el --- Minor mode to resolve diff3 conflicts
-;; Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+;; Copyright (C) 1999, 2000, 01, 03, 2004 Free Software Foundation, Inc.
;; Author: Stefan Monnier <monnier@cs.yale.edu>
-;; Keywords: merge diff3 cvs conflict
-;; Revision: $Id: smerge-mode.el,v 1.13 2001/07/31 08:26:47 gerd Exp $
+;; Keywords: revision-control merge diff3 cvs conflict
;; This file is part of GNU Emacs.
;; (goto-char (point-min))
;; (when (re-search-forward "^<<<<<<< " nil t)
;; (smerge-mode 1))))
-;; (add-hook 'find-file-hooks 'sm-try-smerge t)
+;; (add-hook 'find-file-hook 'sm-try-smerge t)
;;; Todo:
:group 'tools
:prefix "smerge-")
-(defcustom smerge-diff-buffer-name "*smerge-diff*"
+(defcustom smerge-diff-buffer-name "*vc-diff*"
"Buffer name to use for displaying diffs."
:group 'smerge
:type '(choice
(defcustom smerge-diff-switches
(append '("-d" "-b")
(if (listp diff-switches) diff-switches (list diff-switches)))
- "*A list of strings specifying switches to be be passed to diff.
+ "*A list of strings specifying switches to be passed to diff.
Used in `smerge-diff-base-mine' and related functions."
:group 'smerge
:type '(repeat string))
(easy-mmode-defmap smerge-basic-map
`(("n" . smerge-next)
("p" . smerge-prev)
+ ("r" . smerge-resolve)
("a" . smerge-keep-all)
("b" . smerge-keep-base)
("o" . smerge-keep-other)
`((,smerge-command-prefix . ,smerge-basic-map))
"Keymap for `smerge-mode'.")
+(defvar smerge-check-cache nil)
+(make-variable-buffer-local 'smerge-check-cache)
+(defun smerge-check (n)
+ (condition-case nil
+ (let ((state (cons (point) (buffer-modified-tick))))
+ (unless (equal (cdr smerge-check-cache) state)
+ (smerge-match-conflict)
+ (setq smerge-check-cache (cons (match-data) state)))
+ (nth (* 2 n) (car smerge-check-cache)))
+ (error nil)))
+
(easy-menu-define smerge-mode-menu smerge-mode-map
"Menu for `smerge-mode'."
'("SMerge"
["Next" smerge-next :help "Go to next conflict"]
["Previous" smerge-prev :help "Go to previous conflict"]
- ["Keep All" smerge-keep-all :help "Keep all three versions"]
- ["Revert to Base" smerge-keep-base :help "Revert to base version"]
- ["Keep Other" smerge-keep-other :help "Keep `other' version"]
- ["Keep Yours" smerge-keep-mine :help "Keep your version"]
- ["Keep Current" smerge-keep-current :help "Use current (at point) version"]
+ "--"
+ ["Keep All" smerge-keep-all :help "Keep all three versions"
+ :active (smerge-check 1)]
+ ["Keep Current" smerge-keep-current :help "Use current (at point) version"
+ :active (and (smerge-check 1) (> (smerge-get-current) 0))]
+ "--"
+ ["Revert to Base" smerge-keep-base :help "Revert to base version"
+ :active (smerge-check 2)]
+ ["Keep Other" smerge-keep-other :help "Keep `other' version"
+ :active (smerge-check 3)]
+ ["Keep Yours" smerge-keep-mine :help "Keep your version"
+ :active (smerge-check 1)]
"--"
["Diff Base/Mine" smerge-diff-base-mine
- :help "Diff `base' and `mine' for current conflict"]
+ :help "Diff `base' and `mine' for current conflict"
+ :active (smerge-check 2)]
["Diff Base/Other" smerge-diff-base-other
- :help "Diff `base' and `other' for current conflict"]
+ :help "Diff `base' and `other' for current conflict"
+ :active (smerge-check 2)]
["Diff Mine/Other" smerge-diff-mine-other
- :help "Diff `mine' and `other' for current conflict"]
+ :help "Diff `mine' and `other' for current conflict"
+ :active (smerge-check 1)]
"--"
["Invoke Ediff" smerge-ediff
- :help "Use Ediff to resolve the conflicts"]
+ :help "Use Ediff to resolve the conflicts"
+ :active (smerge-check 1)]
+ ["Auto Resolve" smerge-resolve
+ :help "Try auto-resolution heuristics"
+ :active (smerge-check 1)]
+ ["Combine" smerge-combine-with-next
+ :help "Combine current conflict with next"
+ :active (smerge-check 1)]
+ ))
+
+(easy-menu-define smerge-context-menu nil
+ "Context menu for mine area in `smerge-mode'."
+ '(nil
+ ["Keep Current" smerge-keep-current :help "Use current (at point) version"]
+ ["Kill Current" smerge-kill-current :help "Remove current (at point) version"]
+ ["Keep All" smerge-keep-all :help "Keep all three versions"]
+ "---"
+ ["More..." (popup-menu smerge-mode-menu) :help "Show full SMerge mode menu"]
))
(defconst smerge-font-lock-keywords
;; Compiler pacifiers
(defvar font-lock-mode)
(defvar font-lock-keywords)
-(eval-when-compile
- (unless (fboundp 'font-lock-fontify-region)
- (autoload 'font-lock-fontify-region "font-lock")))
;;;;
;;;; Actual code
(save-excursion (goto-char (point-min))
(not (re-search-forward smerge-begin-re nil t))))
(smerge-mode -1)))
-
+
(defun smerge-keep-all ()
- "Keep all three versions.
-Convenient for the kind of conflicts that can arise in ChangeLog files."
+ "Concatenate all versions."
(interactive)
(smerge-match-conflict)
- (replace-match (concat (or (match-string 1) "")
- (or (match-string 2) "")
- (or (match-string 3) ""))
- t t)
+ (let ((mb2 (or (match-beginning 2) (point-max)))
+ (me2 (or (match-end 2) (point-min))))
+ (delete-region (match-end 3) (match-end 0))
+ (delete-region (max me2 (match-end 1)) (match-beginning 3))
+ (if (and (match-end 2) (/= (match-end 1) (match-end 3)))
+ (delete-region (match-end 1) (match-beginning 2)))
+ (delete-region (match-beginning 0) (min (match-beginning 1) mb2))
+ (smerge-auto-leave)))
+
+(defun smerge-keep-n (n)
+ ;; We used to use replace-match, but that did not preserve markers so well.
+ (delete-region (match-end n) (match-end 0))
+ (delete-region (match-beginning 0) (match-beginning n)))
+
+(defun smerge-combine-with-next ()
+ "Combine the current conflict with the next one."
+ (interactive)
+ (smerge-match-conflict)
+ (let ((ends nil))
+ (dolist (i '(3 2 1 0))
+ (push (if (match-end i) (copy-marker (match-end i) t)) ends))
+ (setq ends (apply 'vector ends))
+ (goto-char (aref ends 0))
+ (if (not (re-search-forward smerge-begin-re nil t))
+ (error "No next conflict")
+ (smerge-match-conflict)
+ (let ((match-data (mapcar (lambda (m) (if m (copy-marker m)))
+ (match-data))))
+ ;; First copy the in-between text in each alternative.
+ (dolist (i '(1 2 3))
+ (when (aref ends i)
+ (goto-char (aref ends i))
+ (insert-buffer-substring (current-buffer)
+ (aref ends 0) (car match-data))))
+ (delete-region (aref ends 0) (car match-data))
+ ;; Then move the second conflict's alternatives into the first.
+ (dolist (i '(1 2 3))
+ (set-match-data match-data)
+ (when (and (aref ends i) (match-end i))
+ (goto-char (aref ends i))
+ (insert-buffer-substring (current-buffer)
+ (match-beginning i) (match-end i))))
+ (delete-region (car match-data) (cadr match-data))
+ ;; Free the markers.
+ (dolist (m match-data) (if m (move-marker m nil)))
+ (mapc (lambda (m) (if m (move-marker m nil))) ends)))))
+
+(defvar smerge-resolve-function
+ (lambda () (error "Don't know how to resolve"))
+ "Mode-specific merge function.
+The function is called with no argument and with the match data set
+according to `smerge-match-conflict'.")
+
+(defvar smerge-text-properties
+ `(help-echo "merge conflict: mouse-3 shows a menu"
+ ;; mouse-face highlight
+ keymap (keymap (down-mouse-3 . smerge-popup-context-menu))))
+
+(defun smerge-remove-props (&optional beg end)
+ (remove-text-properties
+ (or beg (match-beginning 0))
+ (or end (match-end 0))
+ smerge-text-properties))
+
+(defun smerge-popup-context-menu (event)
+ "Pop up the Smerge mode context menu under mouse."
+ (interactive "e")
+ (if (and smerge-mode
+ (save-excursion (posn-set-point (event-end event)) (smerge-check 1)))
+ (progn
+ (posn-set-point (event-end event))
+ (smerge-match-conflict)
+ (let ((i (smerge-get-current))
+ o)
+ (if (<= i 0)
+ ;; Out of range
+ (popup-menu smerge-mode-menu)
+ ;; Install overlay.
+ (setq o (make-overlay (match-beginning i) (match-end i)))
+ (unwind-protect
+ (progn
+ (overlay-put o 'face 'highlight)
+ (sit-for 0) ;Display the new highlighting.
+ (popup-menu smerge-context-menu))
+ ;; Delete overlay.
+ (delete-overlay o)))))
+ ;; There's no conflict at point, the text-props are just obsolete.
+ (save-excursion
+ (let ((beg (re-search-backward smerge-end-re nil t))
+ (end (re-search-forward smerge-begin-re nil t)))
+ (smerge-remove-props (or beg (point-min)) (or end (point-max)))
+ (push event unread-command-events)))))
+
+(defun smerge-resolve ()
+ "Resolve the conflict at point intelligently.
+This relies on mode-specific knowledge and thus only works in
+some major modes. Uses `smerge-resolve-function' to do the actual work."
+ (interactive)
+ (smerge-match-conflict)
+ (smerge-remove-props)
+ (cond
+ ;; Trivial diff3 -A non-conflicts.
+ ((and (eq (match-end 1) (match-end 3))
+ (eq (match-beginning 1) (match-beginning 3)))
+ ;; FIXME: Add "if [ diff -b MINE OTHER ]; then select OTHER; fi"
+ (smerge-keep-n 3))
+ ((and (match-end 2)
+ ;; FIXME: Add "diff -b BASE MINE | patch OTHER".
+ ;; FIXME: Add "diff -b BASE OTHER | patch MINE".
+ nil)
+ )
+ ((and (not (match-end 2))
+ ;; FIXME: Add "diff -b"-based refinement.
+ nil)
+ )
+ (t
+ ;; Mode-specific conflict resolution.
+ (funcall smerge-resolve-function)))
(smerge-auto-leave))
(defun smerge-keep-base ()
(interactive)
(smerge-match-conflict)
(smerge-ensure-match 2)
- (replace-match (match-string 2) t t)
+ (smerge-remove-props)
+ (smerge-keep-n 2)
(smerge-auto-leave))
(defun smerge-keep-other ()
(interactive)
(smerge-match-conflict)
;;(smerge-ensure-match 3)
- (replace-match (match-string 3) t t)
+ (smerge-remove-props)
+ (smerge-keep-n 3)
(smerge-auto-leave))
(defun smerge-keep-mine ()
(interactive)
(smerge-match-conflict)
;;(smerge-ensure-match 1)
- (replace-match (match-string 1) t t)
+ (smerge-remove-props)
+ (smerge-keep-n 1)
(smerge-auto-leave))
-(defun smerge-keep-current ()
- "Use the current (under the cursor) version."
- (interactive)
- (smerge-match-conflict)
+(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")
- (replace-match (match-string i) t t)
+ (smerge-remove-props)
+ (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")
+ (smerge-remove-props)
+ (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)
(start (match-beginning 0))
(mine-start (match-end 0))
- (filename (match-string 1))
+ (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))
;; 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.
+ (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 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)
- (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)))
-
+ ((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)))
+
+ (let ((inhibit-read-only t)
+ (inhibit-modification-hooks t)
+ (m (buffer-modified-p)))
+ (unwind-protect
+ (add-text-properties start end smerge-text-properties)
+ (restore-buffer-modified-p m)))
+
(store-match-data (list start end
mine-start mine-end
base-start base-end
(when base-start (1- base-start)) base-start
(1- other-start) other-start))
t)
- (error "Point not in conflict region"))))
+ (search-failed (error "Point not in conflict region")))))
(defun smerge-find-conflict (&optional limit)
"Find and match a conflict region. Intended as a font-lock MATCHER.
Returns non-nil if a match is found between the point and LIMIT.
The point is moved to the end of the conflict."
(when (re-search-forward smerge-begin-re limit t)
- (ignore-errors
- (smerge-match-conflict)
- (goto-char (match-end 0)))))
+ (condition-case err
+ (progn
+ (smerge-match-conflict)
+ (goto-char (match-end 0)))
+ (error (smerge-find-conflict limit)))))
(defun smerge-diff (n1 n2)
(smerge-match-conflict)
(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 (file-relative-name buffer-file-name)))
- (write-region (match-beginning n1) (match-end n1) file1)
- (write-region (match-beginning n2) (match-end n2) file2)
+ (file (file-relative-name buffer-file-name))
+ (coding-system-for-read buffer-file-coding-system))
+ (write-region beg1 end1 file1 nil 'nomessage)
+ (write-region beg2 end2 file2 nil 'nomessage)
(unwind-protect
(with-current-buffer (get-buffer-create smerge-diff-buffer-name)
(setq default-directory dir)
(let ((inhibit-read-only t))
(erase-buffer)
- (apply 'call-process diff-command nil t nil
- (append smerge-diff-switches
- (list "-L" (concat name1 "/" file)
- "-L" (concat name2 "/" file)
- file1 file2))))
+ (let ((status
+ (apply 'call-process diff-command nil t nil
+ (append smerge-diff-switches
+ (list "-L" (concat name1 "/" file)
+ "-L" (concat name2 "/" file)
+ file1 file2)))))
+ (if (eq status 0) (insert "No differences found.\n"))))
(goto-char (point-min))
(diff-mode)
(display-buffer (current-buffer) t))
(delete-file file1)
(delete-file file2))))
-(eval-when-compile
- ;; compiler pacifiers
- (defvar smerge-ediff-windows)
- (defvar smerge-ediff-buf)
- (defvar ediff-buffer-A)
- (defvar ediff-buffer-B)
- (defvar ediff-buffer-C)
- (unless (fboundp 'ediff-cleanup-mess)
- (autoload 'ediff-cleanup-mess "ediff-util")))
-
-(defun smerge-ediff ()
- "Invoke ediff to resolve the conflicts."
+;; compiler pacifiers
+(defvar smerge-ediff-windows)
+(defvar smerge-ediff-buf)
+(defvar ediff-buffer-A)
+(defvar ediff-buffer-B)
+(defvar ediff-buffer-C)
+
+;;;###autoload
+(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 (concat "*" filename " MINE*")))
- (other (generate-new-buffer (concat "*" filename " OTHER*")))
+ (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)
(goto-char (point-min))
(while (smerge-find-conflict)
(when (match-beginning 2) (setq base t))
- (replace-match (match-string 1) t t))
+ (smerge-keep-n 1))
(buffer-enable-undo)
(set-buffer-modified-p nil)
(funcall mode))
(insert-buffer-substring buf)
(goto-char (point-min))
(while (smerge-find-conflict)
- (replace-match (match-string 3) t t))
+ (smerge-keep-n 3))
(buffer-enable-undo)
(set-buffer-modified-p nil)
(funcall mode))
-
+
(when base
- (setq base (generate-new-buffer (concat "*" filename " 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)
- (replace-match (or (match-string 2) "") t t))
+ (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
;; 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)
(provide 'smerge-mode)
+
+;; arch-tag: 605c8d1e-e43d-4943-a6f3-1bcc4333e690
;;; smerge-mode.el ends here