lisp/ediff-vers.el

   1 ;;; ediff-vers.el --- version control interface to Ediff
   2
   3 ;;; Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
   4
   5 ;; Author: Michael Kifer <kifer@cs.sunysb.edu>
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 2, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22 ;; Boston, MA 02111-1307, USA.
  23
  24
  25 ;;; Code:
  26
  27 ;; Compiler pacifier
  28 (defvar rcs-default-co-switches)
  29 (defvar sc-mode)
  30 (defvar cvs-shell)
  31 (defvar cvs-program)
  32 (defvar cvs-cookie-handle)
  33 (defvar ediff-temp-file-prefix)
  34
  35 (and noninteractive
  36      (eval-when-compile
  37        (load "pcl-cvs" 'noerror)
  38        (load "rcs" 'noerror)
  39        (load "generic-sc" 'noerror)
  40        (load "vc" 'noerror)))
  41 ;; end pacifier
  42
  43 ;; VC.el support
  44 (defun ediff-vc-internal (rev1 rev2 &optional startup-hooks)
  45 ;; Run Ediff on versions of the current buffer.
  46 ;; If REV2 is "" then compare current buffer with REV1.
  47 ;; If the current buffer is named `F', the version is named `F.~REV~'.
  48 ;; If `F.~REV~' already exists, it is used instead of being re-created.
  49   (let (file1 file2 rev1buf rev2buf)
  50     (save-excursion
  51       (vc-version-other-window rev1)
  52       (setq rev1buf (current-buffer)
  53             file1 (buffer-file-name)))
  54     (save-excursion
  55       (or (string= rev2 "")             ; use current buffer
  56           (vc-version-other-window rev2))
  57       (setq rev2buf (current-buffer)
  58             file2 (buffer-file-name)))
  59     (setq startup-hooks
  60           (cons (` (lambda ()
  61                      (delete-file (, file1))
  62                      (or (, (string= rev2 "")) (delete-file (, file2)))
  63                      ))
  64                 startup-hooks))
  65     (ediff-buffers
  66      rev1buf rev2buf
  67      startup-hooks
  68      'ediff-revision)))
  69
  70 ;; RCS.el support
  71 (defun rcs-ediff-view-revision (&optional rev)
  72 ;; View previous RCS revision of current file.
  73 ;; With prefix argument, prompts for a revision name.
  74   (interactive (list (if current-prefix-arg
  75                          (read-string "Revision: "))))
  76   (let* ((filename (buffer-file-name (current-buffer)))
  77          (switches (append '("-p")
  78                            (if rev (list (concat "-r" rev)) nil)))
  79          (buff (concat (file-name-nondirectory filename) ".~" rev "~")))
  80     (message "Working ...")
  81     (setq filename (expand-file-name filename))
  82     (with-output-to-temp-buffer buff
  83       (let ((output-buffer (ediff-rcs-get-output-buffer filename buff)))
  84         (delete-windows-on output-buffer)
  85         (save-excursion
  86           (set-buffer output-buffer)
  87           (apply 'call-process "co" nil t nil
  88                  ;; -q: quiet (no diagnostics)
  89                  (append switches rcs-default-co-switches
  90                          (list "-q" filename)))))
  91       (message "")
  92       buff)))
  93
  94 (defun ediff-rcs-get-output-buffer (file name)
  95   ;; Get a buffer for RCS output for FILE, make it writable and clean it up.
  96   ;; Optional NAME is name to use instead of `*RCS-output*'.
  97   ;; This is a modified version from rcs.el v1.1. I use it here to make
  98   ;; Ediff immune to changes in rcs.el
  99   (let* ((default-major-mode 'fundamental-mode) ; no frills!
 100          (buf (get-buffer-create name)))
 101     (save-excursion
 102       (set-buffer buf)
 103       (setq buffer-read-only nil
 104             default-directory (file-name-directory (expand-file-name file)))
 105       (erase-buffer))
 106     buf))
 107
 108 (defun ediff-rcs-internal (rev1 rev2 &optional startup-hooks)
 109 ;; Run Ediff on versions of the current buffer.
 110 ;; If REV2 is "" then use current buffer.
 111   (let ((rev2buf (if (string= rev2 "")
 112                      (current-buffer)
 113                    (rcs-ediff-view-revision rev2)))
 114         (rev1buf (rcs-ediff-view-revision rev1)))
 115
 116     ;; rcs.el doesn't create temp version files, so we don't have to delete
 117     ;; anything in startup hooks to ediff-buffers
 118     (ediff-buffers rev1buf rev2buf startup-hooks 'ediff-revision)
 119     ))
 120
 121
 122 ;; GENERIC-SC.el support
 123
 124 (defun generic-sc-get-latest-rev ()
 125   (cond ((eq sc-mode 'CCASE)
 126          (eval "main/LATEST"))
 127         (t (eval ""))))
 128
 129 (defun ediff-generic-sc-internal (rev1 rev2 &optional startup-hooks)
 130 ;; Run Ediff on versions of the current buffer.
 131 ;; If REV2 is "" then compare current buffer with REV1.
 132 ;; If the current buffer is named `F', the version is named `F.~REV~'.
 133 ;; If `F.~REV~' already exists, it is used instead of being re-created.
 134   (let (rev1buf rev2buf)
 135     (save-excursion
 136       (if (or (not rev1) (string= rev1 ""))
 137           (setq rev1 (generic-sc-get-latest-rev)))
 138       (sc-visit-previous-revision rev1)
 139       (setq rev1buf (current-buffer)))
 140     (save-excursion
 141       (or (string= rev2 "")             ; use current buffer
 142           (sc-visit-previous-revision rev2))
 143       (setq rev2buf (current-buffer)))
 144     (ediff-buffers rev1buf rev2buf startup-hooks 'ediff-revision)))
 145
 146
 147 ;;; Merge with Version Control
 148
 149 (defun ediff-vc-merge-internal (rev1 rev2 ancestor-rev &optional startup-hooks)
 150 ;; If ANCESTOR-REV non-nil, merge with ancestor
 151   (let (buf1 buf2 ancestor-buf)
 152     (save-excursion
 153       (vc-version-other-window rev1)
 154       (setq buf1 (current-buffer)))
 155     (save-excursion
 156       (or (string= rev2 "")
 157           (vc-version-other-window rev2))
 158       (setq buf2 (current-buffer)))
 159     (if ancestor-rev
 160         (save-excursion
 161           (or (string= ancestor-rev "")
 162               (vc-version-other-window ancestor-rev))
 163           (setq ancestor-buf (current-buffer))))
 164     (setq startup-hooks
 165           (cons
 166            (` (lambda ()
 167                 (delete-file (, (buffer-file-name buf1)))
 168                 (or (, (string= rev2 ""))
 169                     (delete-file (, (buffer-file-name buf2))))
 170                 (or (, (string= ancestor-rev ""))
 171                     (, (not ancestor-rev))
 172                     (delete-file (, (buffer-file-name ancestor-buf))))
 173                 ))
 174            startup-hooks))
 175     (if ancestor-rev
 176         (ediff-merge-buffers-with-ancestor
 177          buf1 buf2 ancestor-buf
 178          startup-hooks 'ediff-merge-revisions-with-ancestor)
 179       (ediff-merge-buffers buf1 buf2 startup-hooks 'ediff-merge-revisions))
 180     ))
 181
 182 (defun ediff-rcs-merge-internal (rev1 rev2 ancestor-rev
 183                                       &optional startup-hooks)
 184   ;; If ANCESTOR-REV non-nil, merge with ancestor
 185   (let (buf1 buf2 ancestor-buf)
 186     (setq buf1 (rcs-ediff-view-revision rev1)
 187           buf2 (if (string= rev2 "")
 188                    (current-buffer)
 189                  (rcs-ediff-view-revision rev2))
 190           ancestor-buf (if ancestor-rev
 191                            (if (string= ancestor-rev "")
 192                                (current-buffer)
 193                              (rcs-ediff-view-revision ancestor-rev))))
 194     ;; rcs.el doesn't create temp version files, so we don't have to delete
 195     ;; anything in startup hooks to ediff-buffers
 196     (if ancestor-rev
 197         (ediff-merge-buffers-with-ancestor
 198          buf1 buf2 ancestor-buf
 199          startup-hooks 'ediff-merge-revisions-with-ancestor)
 200       (ediff-merge-buffers buf1 buf2 startup-hooks 'ediff-merge-revisions))))
 201
 202 (defun ediff-generic-sc-merge-internal (rev1 rev2 ancestor-rev
 203                                              &optional startup-hooks)
 204   ;; If ANCESTOR-REV non-nil, merge with ancestor
 205   (let (buf1 buf2 ancestor-buf)
 206     (save-excursion
 207       (if (string= rev1 "")
 208           (setq rev1 (generic-sc-get-latest-rev)))
 209       (sc-visit-previous-revision rev1)
 210       (setq buf1 (current-buffer)))
 211     (save-excursion
 212       (or (string= rev2 "")
 213           (sc-visit-previous-revision rev2))
 214       (setq buf2 (current-buffer)))
 215     (if ancestor-rev
 216         (save-excursion
 217           (or (string= ancestor-rev "")
 218               (sc-visit-previous-revision ancestor-rev))
 219           (setq ancestor-buf (current-buffer))))
 220     (if ancestor-rev
 221         (ediff-merge-buffers-with-ancestor
 222          buf1 buf2 ancestor-buf
 223          startup-hooks 'ediff-merge-revisions-with-ancestor)
 224       (ediff-merge-buffers buf1 buf2 startup-hooks 'ediff-merge-revisions))))
 225
 226
 227 ;; PCL-CVS.el support
 228
 229 (defun ediff-pcl-cvs-internal (rev1 rev2 &optional startup-hooks)
 230 ;; Run Ediff on a pair of revisions of the current buffer.
 231 ;; If REV1 is "", use the latest revision.
 232 ;; If REV2 is "", use the current buffer as the second file to compare.
 233   (let ((orig-buf (current-buffer))
 234         orig-file-name buf1 buf2 file1 file2)
 235
 236     (or (setq orig-file-name (buffer-file-name (current-buffer)))
 237         (error "Current buffer is not visiting any file"))
 238     (if (string= rev1 "") (setq rev1 nil)) ; latest revision
 239     (setq buf1 (ediff-pcl-cvs-view-revision orig-file-name rev1)
 240           buf2 (if (string= rev2 "")
 241                    orig-buf
 242                  (ediff-pcl-cvs-view-revision orig-file-name rev2))
 243           file1 (buffer-file-name buf1)
 244           file2 (buffer-file-name buf2))
 245     (setq startup-hooks
 246           (cons (` (lambda ()
 247                      (delete-file (, file1))
 248                      (or (, (string= rev2 "")) (delete-file (, file2)))
 249                      ))
 250                 startup-hooks))
 251     (ediff-buffers buf1 buf2 startup-hooks 'ediff-revision)))
 252
 253 ;; This function is the standard Ediff's interface to pcl-cvs.
 254 ;; Works like with other interfaces: runs ediff on versions of the file in the
 255 ;; current buffer.
 256 (defun ediff-pcl-cvs-merge-internal (rev1 rev2 ancestor-rev
 257                                           &optional startup-hooks)
 258 ;; Ediff-merge appropriate revisions of the selected file.
 259 ;; If REV1 is "" then use the latest revision.
 260 ;; If REV2 is "" then merge current buffer's file with REV1.
 261 ;; If ANCESTOR-REV is "" then use current buffer's file as ancestor.
 262 ;; If ANCESTOR-REV is nil, then merge without the ancestor.
 263   (let ((orig-buf (current-buffer))
 264         orig-file-name buf1 buf2 ancestor-buf)
 265
 266     (or (setq orig-file-name (buffer-file-name (current-buffer)))
 267         (error "Current buffer is not visiting any file"))
 268     (if (string= rev1 "") (setq rev1 nil)) ; latest revision
 269
 270     (setq buf1 (ediff-pcl-cvs-view-revision orig-file-name rev1))
 271     (setq buf2 (if (string= rev2 "")
 272                    orig-buf
 273                  (ediff-pcl-cvs-view-revision orig-file-name rev2)))
 274     (if (stringp ancestor-rev)
 275         (setq ancestor-buf
 276               (if (string= ancestor-rev "")
 277                   orig-buf
 278                 (ediff-pcl-cvs-view-revision orig-file-name ancestor-rev))))
 279
 280     (setq startup-hooks
 281           (cons
 282            (` (lambda ()
 283                 (delete-file (, (buffer-file-name buf1)))
 284                 (or (, (string= rev2 ""))
 285                     (delete-file (, (buffer-file-name buf2))))
 286                 (or (, (string= ancestor-rev ""))
 287                     (, (not ancestor-rev))
 288                     (delete-file (, (buffer-file-name ancestor-buf))))
 289                 ))
 290            startup-hooks))
 291
 292     (if ancestor-buf
 293         (ediff-merge-buffers-with-ancestor
 294          buf1 buf2 ancestor-buf startup-hooks
 295          'ediff-merge-revisions-with-ancestor)
 296       (ediff-merge-buffers
 297        buf1 buf2 startup-hooks 'ediff-merge-revisions))
 298     ))
 299
 300 (defun ediff-pcl-cvs-view-revision (file rev)
 301 ;; if rev = "", get the latest revision
 302   (let ((temp-name (make-temp-name
 303                     (concat ediff-temp-file-prefix
 304                             "ediff_" rev))))
 305     (cvs-kill-buffer-visiting temp-name)
 306     (if rev
 307         (message "Retrieving revision %s..." rev)
 308       (message "Retrieving latest revision..."))
 309     (let ((res (call-process cvs-shell nil nil nil "-c"
 310                              (concat cvs-program " update -p "
 311                                      (if rev
 312                                          (concat "-r " rev " ")
 313                                        "")
 314                                      file
 315                                      " > " temp-name))))
 316       (if (and res (not (and (integerp res) (zerop res))))
 317           (error "Failed to retrieve revision: %s" res))
 318
 319       (if rev
 320           (message "Retrieving revision %s... Done." rev)
 321         (message "Retrieving latest revision... Done."))
 322       (find-file-noselect temp-name))))
 323
 324
 325 (defun cvs-run-ediff-on-file-descriptor (tin)
 326 ;; This is a replacement for cvs-emerge-mode
 327 ;; Run after cvs-update.
 328 ;; Ediff-merge appropriate revisions of the selected file.
 329   (let* ((fileinfo (tin-cookie cvs-cookie-handle tin))
 330          (type (cvs-fileinfo->type fileinfo))
 331          (tmp-file
 332           (cvs-retrieve-revision-to-tmpfile fileinfo))
 333          ancestor-file)
 334
 335     (or (memq type '(MERGED CONFLICT MODIFIED))
 336         (error
 337          "Can only merge `Modified', `Merged' or `Conflict' files"))
 338
 339     (cond ((memq type '(MERGED CONFLICT))
 340            (setq ancestor-file
 341                  (cvs-retrieve-revision-to-tmpfile
 342                   fileinfo
 343                   ;; revision
 344                   (cvs-fileinfo->base-revision fileinfo)))
 345            (ediff-merge-buffers-with-ancestor
 346             (find-file-noselect tmp-file)
 347             (find-file-noselect (cvs-fileinfo->backup-file fileinfo))
 348             (find-file-noselect ancestor-file)
 349             nil ; startup-hooks
 350             'ediff-merge-revisions-with-ancestor))
 351           ((eq type 'MODIFIED)
 352            (ediff-merge-buffers
 353             (find-file-noselect tmp-file)
 354             (find-file-noselect (cvs-fileinfo->full-path fileinfo))
 355             nil ; startup-hooks
 356             'ediff-merge-revisions)))
 357     (if (stringp tmp-file) (delete-file tmp-file))
 358     (if (stringp ancestor-file) (delete-file ancestor-file))))
 359
 360 ;;; Local Variables:
 361 ;;; eval: (put 'ediff-defvar-local 'lisp-indent-hook 'defun)
 362 ;;; eval: (put 'ediff-eval-in-buffer 'lisp-indent-hook 1)
 363 ;;; eval: (put 'ediff-eval-in-buffer 'edebug-form-spec '(form body))
 364 ;;; End:
 365
 366 (provide 'ediff-vers)
 367
 368 ;;; ediff-vers.el ends here