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1 ;;; ediff-vers.el --- version control interface to Ediff
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2
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3 ;;; Copyright (C) 1995, 1996 Free Software Foundation, Inc.
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4
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5 ;; Author: Michael Kifer <kifer@cs.sunysb.edu>
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6
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7 ;; This file is part of GNU Emacs.
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8
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9 ;; GNU Emacs is free software; you can redistribute it and/or modify
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10 ;; it under the terms of the GNU General Public License as published by
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11 ;; the Free Software Foundation; either version 2, or (at your option)
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12 ;; any later version.
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13
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14 ;; GNU Emacs is distributed in the hope that it will be useful,
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15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 ;; GNU General Public License for more details.
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18
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19 ;; You should have received a copy of the GNU General Public License
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20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
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21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 ;; Boston, MA 02111-1307, USA.
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23
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24
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25 ;;; Code:
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26
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27 ;; Compiler pacifier
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28 (defvar rcs-default-co-switches)
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29 (defvar sc-mode)
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30 (defvar cvs-shell)
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31 (defvar cvs-program)
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32 (defvar cvs-cookie-handle)
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33
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34 (eval-when-compile
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35 (load "pcl-cvs" 'noerror)
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36 (load "rcs" 'noerror)
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37 (load "generic-sc" 'noerror)
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38 (load "vc" 'noerror))
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39 ;; end pacifier
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40
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41 ;; VC.el support
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42 (defun vc-ediff-internal (rev1 rev2 &optional startup-hooks)
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43 ;; Run Ediff on versions of the current buffer.
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44 ;; If REV2 is "" then compare current buffer with REV1.
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45 ;; If the current buffer is named `F', the version is named `F.~REV~'.
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46 ;; If `F.~REV~' already exists, it is used instead of being re-created.
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47 (let (file1 file2 rev1buf rev2buf)
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48 (save-excursion
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49 (vc-version-other-window rev1)
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50 (setq rev1buf (current-buffer)
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51 file1 (buffer-file-name)))
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52 (save-excursion
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53 (or (string= rev2 "") ; use current buffer
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54 (vc-version-other-window rev2))
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55 (setq rev2buf (current-buffer)
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56 file2 (buffer-file-name)))
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57 (setq startup-hooks
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58 (cons (` (lambda ()
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59 (delete-file (, file1))
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60 (or (, (string= rev2 "")) (delete-file (, file2)))
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61 ))
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62 startup-hooks))
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63 (ediff-buffers
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64 rev1buf rev2buf
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65 startup-hooks
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66 'ediff-revision)))
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67
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68 ;; RCS.el support
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69 (defun rcs-ediff-view-revision (&optional rev)
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70 ;; View previous RCS revision of current file.
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71 ;; With prefix argument, prompts for a revision name.
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72 (interactive (list (if current-prefix-arg
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73 (read-string "Revision: "))))
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74 (let* ((filename (buffer-file-name (current-buffer)))
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75 (switches (append '("-p")
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76 (if rev (list (concat "-r" rev)) nil)))
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77 (buff (concat (file-name-nondirectory filename) ".~" rev "~")))
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78 (message "Working ...")
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79 (setq filename (expand-file-name filename))
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80 (with-output-to-temp-buffer buff
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81 (let ((output-buffer (ediff-rcs-get-output-buffer filename buff)))
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82 (delete-windows-on output-buffer)
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83 (save-excursion
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84 (set-buffer output-buffer)
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85 (apply 'call-process "co" nil t nil
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86 ;; -q: quiet (no diagnostics)
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87 (append switches rcs-default-co-switches
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88 (list "-q" filename)))))
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89 (message "")
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90 buff)))
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91
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92 (defun ediff-rcs-get-output-buffer (file name)
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93 ;; Get a buffer for RCS output for FILE, make it writable and clean it up.
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94 ;; Optional NAME is name to use instead of `*RCS-output*'.
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95 ;; This is a modified version from rcs.el v1.1. I use it here to make
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96 ;; Ediff immune to changes in rcs.el
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97 (let* ((default-major-mode 'fundamental-mode) ; no frills!
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98 (buf (get-buffer-create name)))
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99 (save-excursion
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100 (set-buffer buf)
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101 (setq buffer-read-only nil
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102 default-directory (file-name-directory (expand-file-name file)))
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103 (erase-buffer))
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104 buf))
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105
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106 (defun rcs-ediff-internal (rev1 rev2 &optional startup-hooks)
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107 ;; Run Ediff on versions of the current buffer.
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108 ;; If REV2 is "" then use current buffer.
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109 (let ((rev2buf (if (string= rev2 "")
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110 (current-buffer)
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111 (rcs-ediff-view-revision rev2)))
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112 (rev1buf (rcs-ediff-view-revision rev1)))
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113
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114 ;; rcs.el doesn't create temp version files, so we don't have to delete
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115 ;; anything in startup hooks to ediff-buffers
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116 (ediff-buffers rev1buf rev2buf startup-hooks 'ediff-revision)
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117 ))
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118
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119
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120 ;; GENERIC-SC.el support
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121
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122 (defun generic-sc-get-latest-rev ()
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123 (cond ((eq sc-mode 'CCASE)
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124 (eval "main/LATEST"))
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125 (t (eval ""))))
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126
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127 (defun generic-sc-ediff-internal (rev1 rev2 &optional startup-hooks)
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128 ;; Run Ediff on versions of the current buffer.
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129 ;; If REV2 is "" then compare current buffer with REV1.
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130 ;; If the current buffer is named `F', the version is named `F.~REV~'.
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131 ;; If `F.~REV~' already exists, it is used instead of being re-created.
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132 (let (rev1buf rev2buf)
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133 (save-excursion
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134 (if (or (not rev1) (string= rev1 ""))
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135 (setq rev1 (generic-sc-get-latest-rev)))
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136 (sc-visit-previous-revision rev1)
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137 (setq rev1buf (current-buffer)))
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138 (save-excursion
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139 (or (string= rev2 "") ; use current buffer
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140 (sc-visit-previous-revision rev2))
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141 (setq rev2buf (current-buffer)))
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142 (ediff-buffers rev1buf rev2buf startup-hooks 'ediff-revision)))
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143
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144
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145 ;;; Merge with Version Control
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146
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147 (defun vc-ediff-merge-internal (rev1 rev2 ancestor-rev &optional startup-hooks)
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148 ;; If ANCESTOR-REV non-nil, merge with ancestor
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149 (let (buf1 buf2 ancestor-buf)
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150 (save-excursion
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151 (vc-version-other-window rev1)
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152 (setq buf1 (current-buffer)))
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153 (save-excursion
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154 (or (string= rev2 "")
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155 (vc-version-other-window rev2))
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156 (setq buf2 (current-buffer)))
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157 (if ancestor-rev
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158 (save-excursion
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159 (or (string= ancestor-rev "")
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160 (vc-version-other-window ancestor-rev))
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161 (setq ancestor-buf (current-buffer))))
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162 (setq startup-hooks
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163 (cons
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164 (` (lambda ()
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165 (delete-file (, (buffer-file-name buf1)))
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166 (or (, (string= rev2 ""))
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167 (delete-file (, (buffer-file-name buf2))))
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168 (or (, (string= ancestor-rev ""))
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169 (, (not ancestor-rev))
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170 (delete-file (, (buffer-file-name ancestor-buf))))
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171 ))
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172 startup-hooks))
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173 (if ancestor-rev
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174 (ediff-merge-buffers-with-ancestor
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175 buf1 buf2 ancestor-buf
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176 startup-hooks 'ediff-merge-revisions-with-ancestor)
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177 (ediff-merge-buffers buf1 buf2 startup-hooks 'ediff-merge-revisions))
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178 ))
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179
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180 (defun rcs-ediff-merge-internal (rev1 rev2 ancestor-rev
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181 &optional startup-hooks)
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182 ;; If ANCESTOR-REV non-nil, merge with ancestor
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183 (let (buf1 buf2 ancestor-buf)
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184 (setq buf1 (rcs-ediff-view-revision rev1)
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185 buf2 (if (string= rev2 "")
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186 (current-buffer)
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187 (rcs-ediff-view-revision rev2))
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188 ancestor-buf (if ancestor-rev
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189 (if (string= ancestor-rev "")
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190 (current-buffer)
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191 (rcs-ediff-view-revision ancestor-rev))))
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192 ;; rcs.el doesn't create temp version files, so we don't have to delete
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193 ;; anything in startup hooks to ediff-buffers
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194 (if ancestor-rev
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195 (ediff-merge-buffers-with-ancestor
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196 buf1 buf2 ancestor-buf
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197 startup-hooks 'ediff-merge-revisions-with-ancestor)
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198 (ediff-merge-buffers buf1 buf2 startup-hooks 'ediff-merge-revisions))))
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199
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200 (defun generic-sc-ediff-merge-internal (rev1 rev2 ancestor-rev
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201 &optional startup-hooks)
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202 ;; If ANCESTOR-REV non-nil, merge with ancestor
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203 (let (buf1 buf2 ancestor-buf)
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204 (save-excursion
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205 (if (string= rev1 "")
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206 (setq rev1 (generic-sc-get-latest-rev)))
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207 (sc-visit-previous-revision rev1)
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208 (setq buf1 (current-buffer)))
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209 (save-excursion
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210 (or (string= rev2 "")
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211 (sc-visit-previous-revision rev2))
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212 (setq buf2 (current-buffer)))
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213 (if ancestor-rev
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214 (save-excursion
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215 (or (string= ancestor-rev "")
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216 (sc-visit-previous-revision ancestor-rev))
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217 (setq ancestor-buf (current-buffer))))
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218 (if ancestor-rev
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219 (ediff-merge-buffers-with-ancestor
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220 buf1 buf2 ancestor-buf
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221 startup-hooks 'ediff-merge-revisions-with-ancestor)
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222 (ediff-merge-buffers buf1 buf2 startup-hooks 'ediff-merge-revisions))))
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223
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224
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225 ;; PCL-CVS.el support
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226
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227 (defun pcl-cvs-ediff-internal (rev1 rev2 &optional startup-hooks)
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228 ;; Run Ediff on a pair of revisions of the current buffer.
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229 ;; If REV1 is "", use the latest revision.
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230 ;; If REV2 is "", use the current buffer as the second file to compare.
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231 (let ((orig-buf (current-buffer))
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232 orig-file-name buf1 buf2 file1 file2)
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233
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234 (or (setq orig-file-name (buffer-file-name (current-buffer)))
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235 (error "Current buffer is not visiting any file"))
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236 (if (string= rev1 "") (setq rev1 nil)) ; latest revision
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237 (setq buf1 (ediff-pcl-cvs-view-revision orig-file-name rev1)
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238 buf2 (if (string= rev2 "")
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239 orig-buf
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240 (ediff-pcl-cvs-view-revision orig-file-name rev2))
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241 file1 (buffer-file-name buf1)
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242 file2 (buffer-file-name buf2))
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243 (setq startup-hooks
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244 (cons (` (lambda ()
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245 (delete-file (, file1))
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246 (or (, (string= rev2 "")) (delete-file (, file2)))
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247 ))
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248 startup-hooks))
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249 (ediff-buffers buf1 buf2 startup-hooks 'ediff-revision)))
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250
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251 ;; This function is the standard Ediff's interface to pcl-cvs.
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252 ;; Works like with other interfaces: runs ediff on versions of the file in the
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253 ;; current buffer.
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254 (defun pcl-cvs-ediff-merge-internal (rev1 rev2 ancestor-rev
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255 &optional startup-hooks)
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256 ;; Ediff-merge appropriate revisions of the selected file.
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257 ;; If REV1 is "" then use the latest revision.
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258 ;; If REV2 is "" then merge current buffer's file with REV1.
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259 ;; If ANCESTOR-REV is "" then use current buffer's file as ancestor.
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260 ;; If ANCESTOR-REV is nil, then merge without the ancestor.
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261 (let ((orig-buf (current-buffer))
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262 orig-file-name buf1 buf2 ancestor-buf)
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263
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264 (or (setq orig-file-name (buffer-file-name (current-buffer)))
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265 (error "Current buffer is not visiting any file"))
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266 (if (string= rev1 "") (setq rev1 nil)) ; latest revision
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267
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268 (setq buf1 (ediff-pcl-cvs-view-revision orig-file-name rev1))
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269 (setq buf2 (if (string= rev2 "")
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270 orig-buf
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271 (ediff-pcl-cvs-view-revision orig-file-name rev2)))
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272 (if (stringp ancestor-rev)
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273 (setq ancestor-buf
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274 (if (string= ancestor-rev "")
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275 orig-buf
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276 (ediff-pcl-cvs-view-revision orig-file-name ancestor-rev))))
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277
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278 (setq startup-hooks
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279 (cons
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280 (` (lambda ()
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281 (delete-file (, (buffer-file-name buf1)))
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282 (or (, (string= rev2 ""))
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283 (delete-file (, (buffer-file-name buf2))))
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284 (or (, (string= ancestor-rev ""))
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285 (, (not ancestor-rev))
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286 (delete-file (, (buffer-file-name ancestor-buf))))
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287 ))
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288 startup-hooks))
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289
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290 (if ancestor-buf
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291 (ediff-merge-buffers-with-ancestor
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292 buf1 buf2 ancestor-buf startup-hooks
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293 'ediff-merge-revisions-with-ancestor)
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294 (ediff-merge-buffers
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295 buf1 buf2 startup-hooks 'ediff-merge-revisions))
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296 ))
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297
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298 (defun ediff-pcl-cvs-view-revision (file rev)
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299 ;; if rev = "", get the latest revision
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300 (let ((temp-name (make-temp-name
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301 (concat ediff-temp-file-prefix
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302 "ediff_" rev))))
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303 (cvs-kill-buffer-visiting temp-name)
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304 (if rev
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305 (message "Retrieving revision %s..." rev)
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306 (message "Retrieving latest revision..."))
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307 (let ((res (call-process cvs-shell nil nil nil "-c"
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308 (concat cvs-program " update -p "
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309 (if rev
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310 (concat "-r " rev " ")
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311 "")
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312 file
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313 " > " temp-name))))
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314 (if (and res (not (and (integerp res) (zerop res))))
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315 (error "Failed to retrieve revision: %s" res))
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316
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317 (if rev
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318 (message "Retrieving revision %s... Done." rev)
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319 (message "Retrieving latest revision... Done."))
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320 (find-file-noselect temp-name))))
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321
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322
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323 (defun cvs-run-ediff-on-file-descriptor (tin)
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324 ;; This is a replacement for cvs-emerge-mode
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325 ;; Run after cvs-update.
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326 ;; Ediff-merge appropriate revisions of the selected file.
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327 (let* ((fileinfo (tin-cookie cvs-cookie-handle tin))
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328 (type (cvs-fileinfo->type fileinfo))
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329 (tmp-file
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330 (cvs-retrieve-revision-to-tmpfile fileinfo))
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331 ancestor-file)
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332
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333 (or (memq type '(MERGED CONFLICT MODIFIED))
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334 (error
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335 "Can only merge `Modified', `Merged' or `Conflict' files"))
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336
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337 (cond ((memq type '(MERGED CONFLICT))
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338 (setq ancestor-file
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339 (cvs-retrieve-revision-to-tmpfile
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340 fileinfo
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341 ;; revision
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342 (cvs-fileinfo->base-revision fileinfo)))
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343 (ediff-merge-buffers-with-ancestor
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344 (find-file-noselect tmp-file)
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345 (find-file-noselect (cvs-fileinfo->backup-file fileinfo))
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346 (find-file-noselect ancestor-file)
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347 nil ; startup-hooks
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348 'ediff-merge-revisions-with-ancestor))
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349 ((eq type 'MODIFIED)
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350 (ediff-merge-buffers
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351 (find-file-noselect tmp-file)
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352 (find-file-noselect (cvs-fileinfo->full-path fileinfo))
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353 nil ; startup-hooks
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354 'ediff-merge-revisions)))
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355 (if (stringp tmp-file) (delete-file tmp-file))
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356 (if (stringp ancestor-file) (delete-file ancestor-file))))
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357
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358 ;;; Local Variables:
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359 ;;; eval: (put 'ediff-defvar-local 'lisp-indent-hook 'defun)
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360 ;;; eval: (put 'ediff-eval-in-buffer 'lisp-indent-hook 1)
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361 ;;; End:
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362
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363 (provide 'ediff-vers)
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364
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365 ;;; ediff-vers.el ends here
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