lisp/log-view.el

   1 ;;; log-view.el --- Major mode for browsing RCS/CVS/SCCS log output
   2
   3 ;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   4 ;;   2008, 2009  Free Software Foundation, Inc.
   5
   6 ;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
   7 ;; Keywords: rcs sccs cvs log version-control
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 ;;; Commentary:
  25
  26 ;; Major mode to browse revision log histories.
  27 ;; Currently supports the format output by:
  28 ;;  RCS, SCCS, CVS, Subversion, and DaRCS.
  29
  30 ;; Examples of log output:
  31
  32 ;;;; RCS/CVS:
  33
  34 ;; ----------------------------
  35 ;; revision 1.35        locked by: turlutut
  36 ;; date: 2005-03-22 18:48:38 +0000;  author: monnier;  state: Exp;  lines: +6 -8
  37 ;; (gnus-display-time-event-handler):
  38 ;; Check display-time-timer at runtime rather than only at load time
  39 ;; in case display-time-mode is turned off in the mean time.
  40 ;; ----------------------------
  41 ;; revision 1.34
  42 ;; date: 2005-02-09 15:50:38 +0000;  author: kfstorm;  state: Exp;  lines: +7 -7
  43 ;; branches:  1.34.2;
  44 ;; Change release version from 21.4 to 22.1 throughout.
  45 ;; Change development version from 21.3.50 to 22.0.50.
  46
  47 ;;;; SCCS:
  48
  49 ;;;; Subversion:
  50
  51 ;; ------------------------------------------------------------------------
  52 ;; r4622 | ckuethe | 2007-12-23 18:18:01 -0500 (Sun, 23 Dec 2007) | 2 lines
  53 ;;
  54 ;; uBlox AEK-4T in binary mode. Added to unstable because it breaks gpsfake
  55 ;;
  56 ;; ------------------------------------------------------------------------
  57 ;; r4621 | ckuethe | 2007-12-23 16:48:11 -0500 (Sun, 23 Dec 2007) | 3 lines
  58 ;;
  59 ;; Add a note about requiring usbfs to use the garmin gps18 (usb)
  60 ;; Mention firmware testing the AC12 with firmware BQ00 and BQ04
  61 ;;
  62 ;; ------------------------------------------------------------------------
  63 ;; r4620 | ckuethe | 2007-12-23 15:52:34 -0500 (Sun, 23 Dec 2007) | 1 line
  64 ;;
  65 ;; add link to latest hardware reference
  66 ;; ------------------------------------------------------------------------
  67 ;; r4619 | ckuethe | 2007-12-23 14:37:31 -0500 (Sun, 23 Dec 2007) | 1 line
  68 ;;
  69 ;; there is now a regression test for AC12 without raw data output
  70
  71 ;;;; Darcs:
  72
  73 ;; Changes to darcsum.el:
  74 ;;
  75 ;; Mon Nov 28 15:19:38 GMT 2005  Dave Love <fx@gnu.org>
  76 ;;   * Abstract process startup into darcsum-start-process.  Use TERM=dumb.
  77 ;;   TERM=dumb avoids escape characters, at least, for any old darcs that
  78 ;;   doesn't understand DARCS_DONT_COLOR & al.
  79 ;;
  80 ;; Thu Nov 24 15:20:45 GMT 2005  Dave Love <fx@gnu.org>
  81 ;;   * darcsum-mode-related changes.
  82 ;;   Don't call font-lock-mode (unnecessary) or use-local-map (redundant).
  83 ;;   Use mode-class 'special.  Add :group.
  84 ;;   Add trailing-whitespace option to mode hook and fix
  85 ;;   darcsum-display-changeset not to use trailing whitespace.
  86
  87 ;;;; Mercurial
  88
  89 ;; changeset:   11:8ff1a4166444
  90 ;; tag:         tip
  91 ;; user:        Eric S. Raymond <esr@thyrsus.com>
  92 ;; date:        Wed Dec 26 12:18:58 2007 -0500
  93 ;; summary:     Explain keywords.  Add markup fixes.
  94 ;;
  95 ;; changeset:   10:20abc7ab09c3
  96 ;; user:        Eric S. Raymond <esr@thyrsus.com>
  97 ;; date:        Wed Dec 26 11:37:28 2007 -0500
  98 ;; summary:     Typo fixes.
  99 ;;
 100 ;; changeset:   9:ada9f4da88aa
 101 ;; user:        Eric S. Raymond <esr@thyrsus.com>
 102 ;; date:        Wed Dec 26 11:23:00 2007 -0500
 103 ;; summary:     Add RCS example session.
 104
 105 ;;; Todo:
 106
 107 ;; - add ability to modify a log-entry (via cvs-mode-admin ;-)
 108 ;; - remove references to cvs-*
 109 ;; - make it easier to add support for new backends without changing the code.
 110
 111 ;;; Code:
 112
 113 (eval-when-compile (require 'cl))
 114 (require 'pcvs-util)
 115 (autoload 'vc-find-revision "vc")
 116 (autoload 'vc-diff-internal "vc")
 117
 118 (defvar cvs-minor-wrap-function)
 119
 120 (defgroup log-view nil
 121   "Major mode for browsing log output of RCS/CVS/SCCS."
 122   :group 'pcl-cvs
 123   :prefix "log-view-")
 124
 125 (easy-mmode-defmap log-view-mode-map
 126   '(("z" . kill-this-buffer)
 127     ("m" . log-view-toggle-mark-entry)
 128     ("e" . log-view-modify-change-comment)
 129     ("d" . log-view-diff)
 130     ("D" . log-view-diff-changeset)
 131     ("a" . log-view-annotate-version)
 132     ("f" . log-view-find-revision)
 133     ("n" . log-view-msg-next)
 134     ("p" . log-view-msg-prev)
 135     ("\t" . log-view-msg-next)
 136     ([backtab] . log-view-msg-prev)
 137     ("N" . log-view-file-next)
 138     ("P" . log-view-file-prev)
 139     ("\M-n" . log-view-file-next)
 140     ("\M-p" . log-view-file-prev))
 141   "Log-View's keymap."
 142   :group 'log-view)
 143
 144 (easy-menu-define log-view-mode-menu log-view-mode-map
 145   "Log-View Display Menu"
 146   `("Log-View"
 147     ;; XXX Do we need menu entries for these?
 148     ;; ["Quit"  quit-window]
 149     ;; ["Kill This Buffer"  kill-this-buffer]
 150     ["Mark Log Entry for Diff"  set-mark-command
 151      :help ""]
 152     ["Diff Revisions"  log-view-diff
 153      :help "Get the diff between two revisions"]
 154     ["Changeset Diff"  log-view-diff-changeset
 155      :help "Get the changeset diff between two revisions"]
 156     ["Visit Version"  log-view-find-revision
 157      :help "Visit the version at point"]
 158     ["Annotate Version"  log-view-annotate-version
 159      :help "Annotate the version at point"]
 160     ["Modify Log Comment" log-view-modify-change-comment
 161      :help "Edit the change comment displayed at point"]
 162     "-----"
 163     ["Next Log Entry"  log-view-msg-next
 164      :help "Go to the next count'th log message"]
 165     ["Previous Log Entry"  log-view-msg-prev
 166      :help "Go to the previous count'th log message"]
 167     ["Next File"  log-view-file-next
 168      :help "Go to the next count'th file"]
 169     ["Previous File"  log-view-file-prev
 170      :help "Go to the previous count'th file"]))
 171
 172 (defvar log-view-mode-hook nil
 173   "Hook run at the end of `log-view-mode'.")
 174
 175 (defface log-view-file
 176   '((((class color) (background light))
 177      (:background "grey70" :weight bold))
 178     (t (:weight bold)))
 179   "Face for the file header line in `log-view-mode'."
 180   :group 'log-view)
 181 (define-obsolete-face-alias 'log-view-file-face 'log-view-file "22.1")
 182 (defvar log-view-file-face 'log-view-file)
 183
 184 (defface log-view-message
 185   '((((class color) (background light))
 186      (:background "grey85"))
 187     (t (:weight bold)))
 188   "Face for the message header line in `log-view-mode'."
 189   :group 'log-view)
 190 ;; backward-compatibility alias
 191 (define-obsolete-face-alias 'log-view-message-face 'log-view-message "22.1")
 192 (defvar log-view-message-face 'log-view-message)
 193
 194 (defvar log-view-file-re
 195   (concat "^\\(?:Working file: \\(?1:.+\\)"                ;RCS and CVS.
 196           ;; Subversion has no such thing??
 197           "\\|\\(?:SCCS/s\\.\\|Changes to \\)\\(?1:.+\\):" ;SCCS and Darcs.
 198           "\\)\n")                    ;Include the \n for font-lock reasons.
 199   "Regexp matching the text identifying the file.
 200 The match group number 1 should match the file name itself.")
 201
 202 (defvar log-view-per-file-logs t
 203   "Set if to t if the logs are shown one file at a time.")
 204
 205 (defvar log-view-message-re
 206   (concat "^\\(?:revision \\(?1:[.0-9]+\\)\\(?:\t.*\\)?" ; RCS and CVS.
 207           "\\|r\\(?1:[0-9]+\\) | .* | .*"                ; Subversion.
 208           "\\|D \\(?1:[.0-9]+\\) .*"                     ; SCCS.
 209           ;; Darcs doesn't have revision names.  VC-darcs uses patch names
 210           ;; instead.  Darcs patch names are hashcodes, which do not appear
 211           ;; in the log output :-(, but darcs accepts any prefix of the log
 212           ;; message as a patch name, so we match the first line of the log
 213           ;; message.
 214           ;; First loosely match the date format.
 215           (concat "\\|[^ \n].*[^0-9\n][0-9][0-9]:[0-9][0-9][^0-9\n].*[^ \n]"
 216                   ;;Email of user and finally Msg, used as revision name.
 217                   "  .*@.*\n\\(?:  \\* \\(?1:.*\\)\\)?")
 218           "\\)$")
 219   "Regexp matching the text identifying a revision.
 220 The match group number 1 should match the revision number itself.")
 221
 222 (defvar log-view-font-lock-keywords
 223   ;; We use `eval' so as to use the buffer-local value of log-view-file-re
 224   ;; and log-view-message-re, if applicable.
 225   '((eval . `(,log-view-file-re
 226               (1 (if (boundp 'cvs-filename-face) cvs-filename-face))
 227               (0 log-view-file-face append)))
 228     (eval . `(,log-view-message-re . log-view-message-face))))
 229
 230 (defconst log-view-font-lock-defaults
 231   '(log-view-font-lock-keywords t nil nil nil))
 232
 233 (defvar log-view-vc-fileset nil
 234   "Set this to the fileset corresponding to the current log.")
 235
 236 (defvar log-view-vc-backend nil
 237   "Set this to the VC backend that created the current log.")
 238
 239 ;;;;
 240 ;;;; Actual code
 241 ;;;;
 242
 243 ;;;###autoload
 244 (define-derived-mode log-view-mode special-mode "Log-View"
 245   "Major mode for browsing CVS log output."
 246   (setq buffer-read-only t)
 247   (set (make-local-variable 'font-lock-defaults) log-view-font-lock-defaults)
 248   (set (make-local-variable 'beginning-of-defun-function)
 249        'log-view-beginning-of-defun)
 250   (set (make-local-variable 'end-of-defun-function)
 251        'log-view-end-of-defun)
 252   (set (make-local-variable 'cvs-minor-wrap-function) 'log-view-minor-wrap))
 253
 254 ;;;;
 255 ;;;; Navigation
 256 ;;;;
 257
 258 ;; define log-view-{msg,file}-{next,prev}
 259 (easy-mmode-define-navigation log-view-msg log-view-message-re "log message")
 260 (easy-mmode-define-navigation log-view-file log-view-file-re "file")
 261
 262 (defun log-view-goto-rev (rev)
 263   (goto-char (point-min))
 264   (ignore-errors
 265     (while (not (equal rev (log-view-current-tag)))
 266       (log-view-msg-next))
 267     t))
 268
 269 ;;;;
 270 ;;;; Linkage to PCL-CVS (mostly copied from cvs-status.el)
 271 ;;;;
 272
 273 (defconst log-view-dir-re "^cvs[.ex]* [a-z]+: Logging \\(.+\\)$")
 274
 275 (defun log-view-current-file ()
 276   (save-excursion
 277     (forward-line 1)
 278     (or (re-search-backward log-view-file-re nil t)
 279         (re-search-forward log-view-file-re nil t)
 280         (error "Unable to determine the current file"))
 281     (let* ((file (match-string 1))
 282            (cvsdir (and (re-search-backward log-view-dir-re nil t)
 283                         (match-string 1)))
 284            (pcldir (and (boundp 'cvs-pcl-cvs-dirchange-re)
 285                         (re-search-backward cvs-pcl-cvs-dirchange-re nil t)
 286                         (match-string 1)))
 287            (dir ""))
 288       (let ((default-directory ""))
 289         (when pcldir (setq dir (expand-file-name pcldir dir)))
 290         (when cvsdir (setq dir (expand-file-name cvsdir dir))))
 291       (expand-file-name file dir))))
 292
 293 (defun log-view-current-tag (&optional where)
 294   (save-excursion
 295     (when where (goto-char where))
 296     (forward-line 1)
 297     (let ((pt (point)))
 298       (when (re-search-backward log-view-message-re nil t)
 299         (let ((rev (match-string-no-properties 1)))
 300           (unless (re-search-forward log-view-file-re pt t)
 301             rev))))))
 302
 303 (defun log-view-toggle-mark-entry ()
 304   "Toggle the marked state for the log entry at point.
 305 Individual log entries can be marked and unmarked. The marked
 306 entries are denoted by changing their background color.
 307 `log-view-get-marked' returns the list of tags for the marked
 308 log entries."
 309   (interactive)
 310   (save-excursion
 311     (forward-line 1)
 312     (let ((pt (point)))
 313       (when (re-search-backward log-view-message-re nil t)
 314         (let ((beg (match-beginning 0))
 315               end ov ovlist found tag)
 316           (unless (re-search-forward log-view-file-re pt t)
 317             ;; Look to see if the current entry is marked.
 318             (setq found (get-char-property (point) 'log-view-self))
 319             (if found
 320                 (delete-overlay found)
 321               ;; Create an overlay that covers this entry and change
 322               ;; its color.
 323               (setq tag (log-view-current-tag (point)))
 324               (forward-line 1)
 325               (setq end
 326                     (if (re-search-forward log-view-message-re nil t)
 327                         (match-beginning 0)
 328                       (point-max)))
 329               (setq ov (make-overlay beg end))
 330               (overlay-put ov 'face 'log-view-file)
 331               ;; This is used to check if the overlay is present.
 332               (overlay-put ov 'log-view-self ov)
 333               (overlay-put ov 'log-view-marked tag))))))))
 334
 335 (defun log-view-get-marked ()
 336   "Return the list of tags for the marked log entries."
 337   (save-excursion
 338     (let ((pos (point-min))
 339           marked-list ov)
 340       (while (setq pos (next-single-property-change pos 'face))
 341         (when (setq ov (get-char-property pos 'log-view-self))
 342           (push (overlay-get ov 'log-view-marked) marked-list)
 343           (setq pos (overlay-end ov))))
 344       marked-list)))
 345
 346 (defun log-view-beginning-of-defun ()
 347   ;; This assumes that a log entry starts with a line matching
 348   ;; `log-view-message-re'.  Modes that derive from `log-view-mode'
 349   ;; for which this assumption is not valid will have to provide
 350   ;; another implementation of this function.  `log-view-msg-prev'
 351   ;; does a similar job to this function, we can't use it here
 352   ;; directly because it prints messages that are not appropriate in
 353   ;; this context and it does not move to the beginning of the buffer
 354   ;; when the point is before the first log entry.
 355
 356   ;; `log-view-beginning-of-defun' and `log-view-end-of-defun' have
 357   ;; been checked to work with logs produced by RCS, CVS, git,
 358   ;; mercurial and subversion.
 359
 360   (re-search-backward log-view-message-re nil 'move))
 361
 362 (defun log-view-end-of-defun ()
 363   ;; The idea in this function is to search for the beginning of the
 364   ;; next log entry using `log-view-message-re' and then go back one
 365   ;; line when finding it.  Modes that derive from `log-view-mode' for
 366   ;; which this assumption is not valid will have to provide another
 367   ;; implementation of this function.
 368
 369   ;; Look back and if there is no entry there it means we are before
 370   ;; the first log entry, so go forward until finding one.
 371   (unless (save-excursion (re-search-backward log-view-message-re nil t))
 372     (re-search-forward log-view-message-re nil t))
 373
 374   ;; In case we are at the end of log entry going forward a line will
 375   ;; make us find the next entry when searching. If we are inside of
 376   ;; an entry going forward a line will still keep the point inside
 377   ;; the same entry.
 378   (forward-line 1)
 379
 380   ;; In case we are at the beginning of an entry, move past it.
 381   (when (looking-at log-view-message-re)
 382     (goto-char (match-end 0))
 383     (forward-line 1))
 384
 385   ;; Search for the start of the next log entry.  Go to the end of the
 386   ;; buffer if we could not find a next entry.
 387   (when (re-search-forward log-view-message-re nil 'move)
 388     (goto-char (match-beginning 0))
 389     (forward-line -1)))
 390
 391 (defvar cvs-minor-current-files)
 392 (defvar cvs-branch-prefix)
 393 (defvar cvs-secondary-branch-prefix)
 394
 395 (defun log-view-minor-wrap (buf f)
 396   (let ((data (with-current-buffer buf
 397                 (let* ((beg (point))
 398                        (end (if mark-active (mark) (point)))
 399                        (fr (log-view-current-tag beg))
 400                        (to (log-view-current-tag end)))
 401                   (when (string-equal fr to)
 402                     (save-excursion
 403                       (goto-char end)
 404                       (log-view-msg-next)
 405                       (setq to (log-view-current-tag))))
 406                   (cons
 407                    ;; The first revision has to be the one at point, for
 408                    ;; operations that only take one revision
 409                    ;; (e.g. cvs-mode-edit).
 410                    (cons (log-view-current-file) fr)
 411                    (cons (log-view-current-file) to))))))
 412     (let ((cvs-branch-prefix (cdar data))
 413           (cvs-secondary-branch-prefix (and (cdar data) (cddr data)))
 414           (cvs-minor-current-files
 415            (cons (caar data)
 416                  (when (and (cadr data) (not (equal (caar data) (cadr data))))
 417                    (list (cadr data)))))
 418           ;; FIXME:  I need to force because the fileinfos are UNKNOWN
 419           (cvs-force-command "/F"))
 420       (funcall f))))
 421
 422 (defun log-view-find-revision (pos)
 423   "Visit the version at point."
 424   (interactive "d")
 425   (unless log-view-per-file-logs
 426     (when (> (length log-view-vc-fileset) 1)
 427       (error "Multiple files shown in this buffer, cannot use this command here")))
 428   (save-excursion
 429     (goto-char pos)
 430     (switch-to-buffer (vc-find-revision (if log-view-per-file-logs
 431                                             (log-view-current-file)
 432                                           (car log-view-vc-fileset))
 433                                         (log-view-current-tag)))))
 434
 435
 436 (defun log-view-extract-comment ()
 437   "Parse comment from around the current point in the log."
 438   (save-excursion
 439     (let (st en (backend (vc-backend (log-view-current-file))))
 440       (log-view-end-of-defun)
 441       (cond ((eq backend 'SVN)
 442              (forward-line -1)))
 443       (setq en (point))
 444       (log-view-beginning-of-defun)
 445       (cond ((memq backend '(SCCS RCS CVS MCVS SVN))
 446              (forward-line 2))
 447             ((eq backend 'Hg)
 448              (forward-line 4)
 449              (re-search-forward "summary: *" nil t)))
 450       (setq st (point))
 451       (buffer-substring st en))))
 452
 453 (declare-function vc-modify-change-comment "vc" (files rev oldcomment))
 454
 455 (defun log-view-modify-change-comment ()
 456   "Edit the change comment displayed at point."
 457   (interactive)
 458   (vc-modify-change-comment (list (if log-view-per-file-logs
 459                                       (log-view-current-file)
 460                                     (car log-view-vc-fileset)))
 461                             (log-view-current-tag)
 462                             (log-view-extract-comment)))
 463
 464 (defun log-view-annotate-version (pos)
 465   "Annotate the version at point."
 466   (interactive "d")
 467   (unless log-view-per-file-logs
 468     (when (> (length log-view-vc-fileset) 1)
 469       (error "Multiple files shown in this buffer, cannot use this command here")))
 470   (save-excursion
 471     (goto-char pos)
 472     (vc-annotate (if log-view-per-file-logs
 473                      (log-view-current-file)
 474                    (car log-view-vc-fileset))
 475                  (log-view-current-tag))))
 476
 477 ;;
 478 ;; diff
 479 ;;
 480
 481 (defun log-view-diff (beg end)
 482   "Get the diff between two revisions.
 483 If the mark is not active or the mark is on the revision at point,
 484 get the diff between the revision at point and its previous revision.
 485 Otherwise, get the diff between the revisions where the region starts
 486 and ends.
 487 Contrary to `log-view-diff-changeset', it will only show the part of the
 488 changeset that affected the currently considered file(s)."
 489   (interactive
 490    (list (if mark-active (region-beginning) (point))
 491          (if mark-active (region-end) (point))))
 492   (let ((fr (log-view-current-tag beg))
 493         (to (log-view-current-tag end)))
 494     (when (string-equal fr to)
 495       (save-excursion
 496         (goto-char end)
 497         (log-view-msg-next)
 498         (setq to (log-view-current-tag))))
 499     (vc-diff-internal
 500      t (list log-view-vc-backend
 501              (if log-view-per-file-logs
 502                  (list (log-view-current-file))
 503                log-view-vc-fileset))
 504      to fr)))
 505
 506 (declare-function vc-diff-internal "vc"
 507                   (async vc-fileset rev1 rev2 &optional verbose))
 508
 509 (defun log-view-diff-changeset (beg end)
 510   "Get the diff between two revisions.
 511 If the mark is not active or the mark is on the revision at point,
 512 get the diff between the revision at point and its previous revision.
 513 Otherwise, get the diff between the revisions where the region starts
 514 and ends.
 515 Contrary to `log-view-diff', it will show the whole changeset including
 516 the changes that affected other files than the currently considered file(s)."
 517   (interactive
 518    (list (if mark-active (region-beginning) (point))
 519          (if mark-active (region-end) (point))))
 520   (when (eq (vc-call-backend log-view-vc-backend 'revision-granularity) 'file)
 521     (error "The %s backend does not support changeset diffs" log-view-vc-backend))
 522   (let ((fr (log-view-current-tag beg))
 523         (to (log-view-current-tag end)))
 524     (when (string-equal fr to)
 525       ;; TO and FR are the same, look at the previous revision.
 526       (setq to (vc-call-backend log-view-vc-backend 'previous-revision nil fr)))
 527     (vc-diff-internal
 528      t
 529      ;; We want to see the diff for all the files in the changeset, so
 530      ;; pass NIL for the file list.  The value passed here should
 531      ;; follow what `vc-deduce-fileset' returns.
 532      (list log-view-vc-backend nil)
 533      to fr)))
 534
 535 (provide 'log-view)
 536
 537 ;; arch-tag: 0d64220b-ce7e-4f62-9c2a-6b04c2f81f4f
 538 ;;; log-view.el ends here