lisp/ediff-vers.el

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