211 lines
7.3 KiB
EmacsLisp
211 lines
7.3 KiB
EmacsLisp
;;; ediff-vers.el --- version control interface to Ediff -*- lexical-binding:t -*-
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;; Copyright (C) 1995-1997, 2001-2024 Free Software Foundation, Inc.
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;; Author: Michael Kifer <kifer@cs.stonybrook.edu>
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;; Package: ediff
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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 <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;;; Code:
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(eval-when-compile (require 'ediff-init))
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(defvar rcs-default-co-switches)
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(defcustom ediff-keep-tmp-versions nil
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"If t, do not delete temporary previous versions for the files on which
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comparison or merge operations are being performed."
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:type 'boolean
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:group 'ediff-vers
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)
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(define-obsolete-function-alias 'ediff-vc-revision-other-window
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#'vc-revision-other-window "28.1")
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(define-obsolete-function-alias 'ediff-vc-working-revision
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#'vc-working-revision "28.1")
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;; VC.el support
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(eval-when-compile
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(require 'vc-hooks)) ;; for vc-call macro
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(defun ediff-vc-latest-version (file)
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"Return the version level of the latest version of FILE in repository."
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(if (fboundp 'vc-latest-version)
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(vc-latest-version file)
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(or (vc-file-getprop file 'vc-latest-revision)
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(cond ((vc-backend file)
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(vc-call state file)
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(vc-file-getprop file 'vc-latest-revision))
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(t (error "File %s is not under version control" file))))
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))
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(defun ediff-vc-internal (rev1 rev2 &optional startup-hooks)
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;; Run Ediff on versions of the current buffer.
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;; If REV1 is "", use the latest version of the current buffer's file.
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;; If REV2 is "" then compare current buffer with REV1.
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;; If the current buffer is named `F', the version is named `F.~REV~'.
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;; If `F.~REV~' already exists, it is used instead of being re-created.
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(let (file1 file2 rev1buf rev2buf)
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(if (string= rev1 "")
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(setq rev1 (ediff-vc-latest-version (buffer-file-name))))
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(save-window-excursion
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(save-excursion
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(vc-revision-other-window rev1)
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(setq rev1buf (current-buffer)
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file1 (buffer-file-name)))
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(save-excursion
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(or (string= rev2 "") ; use current buffer
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(vc-revision-other-window rev2))
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(setq rev2buf (current-buffer)
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file2 (buffer-file-name)))
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(push (lambda ()
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(ediff-delete-version-file file1)
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(or (string= rev2 "") (ediff-delete-version-file file2)))
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startup-hooks))
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(ediff-buffers
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rev1buf rev2buf
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startup-hooks
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'ediff-revision)))
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;; RCS.el support
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(defun rcs-ediff-view-revision (&optional rev)
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"View previous RCS revision of current file.
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With prefix argument, prompts for a revision name."
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(interactive (list (if current-prefix-arg
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(read-string "Revision: "))))
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(let* ((filename (buffer-file-name (current-buffer)))
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(switches (append '("-p")
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(if rev (list (concat "-r" rev)) nil)))
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(buff (concat (file-name-nondirectory filename) ".~" rev "~")))
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(message "Working ...")
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(setq filename (expand-file-name filename))
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(with-output-to-temp-buffer buff
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(ediff-with-current-buffer standard-output
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(fundamental-mode))
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(let ((output-buffer (ediff-rcs-get-output-buffer filename buff)))
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(delete-windows-on output-buffer)
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(with-current-buffer output-buffer
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(apply #'call-process "co" nil t nil
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;; -q: quiet (no diagnostics)
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(append switches rcs-default-co-switches
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(list "-q" filename)))))
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(message "")
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buff)))
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(defun ediff-rcs-get-output-buffer (file name)
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;; Get a buffer for RCS output for FILE, make it writable and clean it up.
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;; Optional NAME is name to use instead of `*RCS-output*'.
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;; This is a modified version from rcs.el v1.1. I use it here to make
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;; Ediff immune to changes in rcs.el
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(let ((buf (get-buffer-create name)))
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(with-current-buffer buf
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(setq buffer-read-only nil
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default-directory (file-name-directory (expand-file-name file)))
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(erase-buffer))
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buf))
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(defun ediff-rcs-internal (rev1 rev2 &optional startup-hooks)
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;; Run Ediff on versions of the current buffer.
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;; If REV2 is "" then use current buffer.
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(let (rev2buf rev1buf)
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(save-window-excursion
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(setq rev2buf (if (string= rev2 "")
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(current-buffer)
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(rcs-ediff-view-revision rev2))
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rev1buf (rcs-ediff-view-revision rev1)))
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;; rcs.el doesn't create temp version files, so we don't have to delete
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;; anything in startup hooks to ediff-buffers
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(ediff-buffers rev1buf rev2buf startup-hooks 'ediff-revision)
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))
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;;; Merge with Version Control
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(defun ediff-vc-merge-internal (rev1 rev2 ancestor-rev
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&optional startup-hooks merge-buffer-file)
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;; If ANCESTOR-REV non-nil, merge with ancestor
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(let (buf1 buf2 ancestor-buf)
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(save-window-excursion
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(save-excursion
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(vc-revision-other-window rev1)
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(setq buf1 (current-buffer)))
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(save-excursion
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(or (string= rev2 "")
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(vc-revision-other-window rev2))
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(setq buf2 (current-buffer)))
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(if ancestor-rev
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(save-excursion
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(if (string= ancestor-rev "")
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(setq ancestor-rev (vc-working-revision
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buffer-file-name)))
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(vc-revision-other-window ancestor-rev)
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(setq ancestor-buf (current-buffer))))
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(push (let ((f1 (buffer-file-name buf1))
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(f2 (unless (string= rev2 "") (buffer-file-name buf2)))
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(fa (unless (or (string= ancestor-rev "")
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(not ancestor-rev))
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(buffer-file-name ancestor-buf))))
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(lambda ()
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(ediff-delete-version-file f1)
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(if f2 (ediff-delete-version-file f2))
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(if fa (ediff-delete-version-file fa))))
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startup-hooks))
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(if ancestor-rev
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(ediff-merge-buffers-with-ancestor
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buf1 buf2 ancestor-buf
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startup-hooks 'ediff-merge-revisions-with-ancestor merge-buffer-file)
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(ediff-merge-buffers
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buf1 buf2 startup-hooks 'ediff-merge-revisions merge-buffer-file))
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))
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(defun ediff-rcs-merge-internal (rev1 rev2 ancestor-rev
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&optional
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startup-hooks merge-buffer-file)
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;; If ANCESTOR-REV non-nil, merge with ancestor
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(let (buf1 buf2 ancestor-buf)
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(save-window-excursion
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(setq buf1 (rcs-ediff-view-revision rev1)
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buf2 (if (string= rev2 "")
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(current-buffer)
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(rcs-ediff-view-revision rev2))
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ancestor-buf (if ancestor-rev
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(if (string= ancestor-rev "")
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(current-buffer)
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(rcs-ediff-view-revision ancestor-rev)))))
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;; rcs.el doesn't create temp version files, so we don't have to delete
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;; anything in startup hooks to ediff-buffers
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(if ancestor-rev
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(ediff-merge-buffers-with-ancestor
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buf1 buf2 ancestor-buf
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startup-hooks 'ediff-merge-revisions-with-ancestor merge-buffer-file)
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(ediff-merge-buffers
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buf1 buf2 startup-hooks 'ediff-merge-revisions merge-buffer-file))))
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;; delete version file on exit unless ediff-keep-tmp-versions is true
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(defun ediff-delete-version-file (file)
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(or ediff-keep-tmp-versions (delete-file file)))
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(provide 'ediff-vers)
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;;; ediff-vers.el ends here
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