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, 2010, 2011  Free Software Foundation, Inc.
   5
   6 ;; Author: Stefan Monnier <monnier@iro.umontreal.ca>
   7 ;; Keywords: rcs sccs cvs log version-control tools
   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 ;; Needed because log-view-mode-map inherits from widget-keymap.  (Bug#5311)
 126 (require 'wid-edit)
 127
 128 (easy-mmode-defmap log-view-mode-map
 129   '(("z" . kill-this-buffer)
 130     ("q" . quit-window)
 131     ("g" . revert-buffer)
 132     ("m" . log-view-toggle-mark-entry)
 133     ("e" . log-view-modify-change-comment)
 134     ("d" . log-view-diff)
 135     ("=" . log-view-diff)
 136     ("D" . log-view-diff-changeset)
 137     ("a" . log-view-annotate-version)
 138     ("f" . log-view-find-revision)
 139     ("n" . log-view-msg-next)
 140     ("p" . log-view-msg-prev)
 141     ("\t" . log-view-msg-next)
 142     ([backtab] . log-view-msg-prev)
 143     ("N" . log-view-file-next)
 144     ("P" . log-view-file-prev)
 145     ("\M-n" . log-view-file-next)
 146     ("\M-p" . log-view-file-prev))
 147   "Log-View's keymap."
 148   :inherit widget-keymap
 149   :group 'log-view)
 150
 151 (easy-menu-define log-view-mode-menu log-view-mode-map
 152   "Log-View Display Menu"
 153   `("Log-View"
 154     ;; XXX Do we need menu entries for these?
 155     ;; ["Quit"  quit-window]
 156     ;; ["Kill This Buffer"  kill-this-buffer]
 157     ["Mark Log Entry for Diff"  set-mark-command
 158      :help ""]
 159     ["Diff Revisions"  log-view-diff
 160      :help "Get the diff between two revisions"]
 161     ["Changeset Diff"  log-view-diff-changeset
 162      :help "Get the changeset diff between two revisions"]
 163     ["Visit Version"  log-view-find-revision
 164      :help "Visit the version at point"]
 165     ["Annotate Version"  log-view-annotate-version
 166      :help "Annotate the version at point"]
 167     ["Modify Log Comment" log-view-modify-change-comment
 168      :help "Edit the change comment displayed at point"]
 169     "-----"
 170     ["Next Log Entry"  log-view-msg-next
 171      :help "Go to the next count'th log message"]
 172     ["Previous Log Entry"  log-view-msg-prev
 173      :help "Go to the previous count'th log message"]
 174     ["Next File"  log-view-file-next
 175      :help "Go to the next count'th file"]
 176     ["Previous File"  log-view-file-prev
 177      :help "Go to the previous count'th file"]))
 178
 179 (defvar log-view-mode-hook nil
 180   "Hook run at the end of `log-view-mode'.")
 181
 182 (defface log-view-file
 183   '((((class color) (background light))
 184      (:background "grey70" :weight bold))
 185     (t (:weight bold)))
 186   "Face for the file header line in `log-view-mode'."
 187   :group 'log-view)
 188 (define-obsolete-face-alias 'log-view-file-face 'log-view-file "22.1")
 189 (defvar log-view-file-face 'log-view-file)
 190
 191 (defface log-view-message
 192   '((((class color) (background light))
 193      (:background "grey85"))
 194     (t (:weight bold)))
 195   "Face for the message header line in `log-view-mode'."
 196   :group 'log-view)
 197 ;; backward-compatibility alias
 198 (define-obsolete-face-alias 'log-view-message-face 'log-view-message "22.1")
 199 (defvar log-view-message-face 'log-view-message)
 200
 201 (defvar log-view-file-re
 202   (concat "^\\(?:Working file: \\(?1:.+\\)"                ;RCS and CVS.
 203           ;; Subversion has no such thing??
 204           "\\|\\(?:SCCS/s\\.\\|Changes to \\)\\(?1:.+\\):" ;SCCS and Darcs.
 205           "\\)\n")                    ;Include the \n for font-lock reasons.
 206   "Regexp matching the text identifying the file.
 207 The match group number 1 should match the file name itself.")
 208
 209 (defvar log-view-per-file-logs t
 210   "Set if to t if the logs are shown one file at a time.")
 211
 212 (defvar log-view-message-re
 213   (concat "^\\(?:revision \\(?1:[.0-9]+\\)\\(?:\t.*\\)?" ; RCS and CVS.
 214           "\\|r\\(?1:[0-9]+\\) | .* | .*"                ; Subversion.
 215           "\\|D \\(?1:[.0-9]+\\) .*"                     ; SCCS.
 216           ;; Darcs doesn't have revision names.  VC-darcs uses patch names
 217           ;; instead.  Darcs patch names are hashcodes, which do not appear
 218           ;; in the log output :-(, but darcs accepts any prefix of the log
 219           ;; message as a patch name, so we match the first line of the log
 220           ;; message.
 221           ;; First loosely match the date format.
 222           (concat "\\|[^ \n].*[^0-9\n][0-9][0-9]:[0-9][0-9][^0-9\n].*[^ \n]"
 223                   ;;Email of user and finally Msg, used as revision name.
 224                   "  .*@.*\n\\(?:  \\* \\(?1:.*\\)\\)?")
 225           "\\)$")
 226   "Regexp matching the text identifying a revision.
 227 The match group number 1 should match the revision number itself.")
 228
 229 (defvar log-view-font-lock-keywords
 230   ;; We use `eval' so as to use the buffer-local value of log-view-file-re
 231   ;; and log-view-message-re, if applicable.
 232   '((eval . `(,log-view-file-re
 233               (1 (if (boundp 'cvs-filename-face) cvs-filename-face))
 234               (0 log-view-file-face append)))
 235     (eval . `(,log-view-message-re . log-view-message-face))))
 236
 237 (defconst log-view-font-lock-defaults
 238   '(log-view-font-lock-keywords t nil nil nil))
 239
 240 (defvar log-view-vc-fileset nil
 241   "Set this to the fileset corresponding to the current log.")
 242
 243 (defvar log-view-vc-backend nil
 244   "Set this to the VC backend that created the current log.")
 245
 246 ;;;;
 247 ;;;; Actual code
 248 ;;;;
 249
 250 ;;;###autoload
 251 (define-derived-mode log-view-mode special-mode "Log-View"
 252   "Major mode for browsing CVS log output."
 253   (setq buffer-read-only t)
 254   (set (make-local-variable 'font-lock-defaults) log-view-font-lock-defaults)
 255   (set (make-local-variable 'beginning-of-defun-function)
 256        'log-view-beginning-of-defun)
 257   (set (make-local-variable 'end-of-defun-function)
 258        'log-view-end-of-defun)
 259   (set (make-local-variable 'cvs-minor-wrap-function) 'log-view-minor-wrap))
 260
 261 ;;;;
 262 ;;;; Navigation
 263 ;;;;
 264
 265 ;; define log-view-{msg,file}-{next,prev}
 266 (easy-mmode-define-navigation log-view-msg log-view-message-re "log message")
 267 (easy-mmode-define-navigation log-view-file log-view-file-re "file")
 268
 269 (defun log-view-goto-rev (rev)
 270   (goto-char (point-min))
 271   (ignore-errors
 272     (while (not (equal rev (log-view-current-tag)))
 273       (log-view-msg-next))
 274     t))
 275
 276 ;;;;
 277 ;;;; Linkage to PCL-CVS (mostly copied from cvs-status.el)
 278 ;;;;
 279
 280 (defconst log-view-dir-re "^cvs[.ex]* [a-z]+: Logging \\(.+\\)$")
 281
 282 (defun log-view-current-file ()
 283   (save-excursion
 284     (forward-line 1)
 285     (or (re-search-backward log-view-file-re nil t)
 286         (re-search-forward log-view-file-re nil t)
 287         (error "Unable to determine the current file"))
 288     (let* ((file (match-string 1))
 289            (cvsdir (and (re-search-backward log-view-dir-re nil t)
 290                         (match-string 1)))
 291            (pcldir (and (boundp 'cvs-pcl-cvs-dirchange-re)
 292                         (re-search-backward cvs-pcl-cvs-dirchange-re nil t)
 293                         (match-string 1)))
 294            (dir ""))
 295       (let ((default-directory ""))
 296         (when pcldir (setq dir (expand-file-name pcldir dir)))
 297         (when cvsdir (setq dir (expand-file-name cvsdir dir))))
 298       (expand-file-name file dir))))
 299
 300 (defun log-view-current-tag (&optional where)
 301   (save-excursion
 302     (when where (goto-char where))
 303     (forward-line 1)
 304     (let ((pt (point)))
 305       (when (re-search-backward log-view-message-re nil t)
 306         (let ((rev (match-string-no-properties 1)))
 307           (unless (re-search-forward log-view-file-re pt t)
 308             rev))))))
 309
 310 (defun log-view-toggle-mark-entry ()
 311   "Toggle the marked state for the log entry at point.
 312 Individual log entries can be marked and unmarked. The marked
 313 entries are denoted by changing their background color.
 314 `log-view-get-marked' returns the list of tags for the marked
 315 log entries."
 316   (interactive)
 317   (save-excursion
 318     (forward-line 1)
 319     (let ((pt (point)))
 320       (when (re-search-backward log-view-message-re nil t)
 321         (let ((beg (match-beginning 0))
 322               end ov ovlist found tag)
 323           (unless (re-search-forward log-view-file-re pt t)
 324             ;; Look to see if the current entry is marked.
 325             (setq found (get-char-property (point) 'log-view-self))
 326             (if found
 327                 (delete-overlay found)
 328               ;; Create an overlay that covers this entry and change
 329               ;; its color.
 330               (setq tag (log-view-current-tag (point)))
 331               (forward-line 1)
 332               (setq end
 333                     (if (re-search-forward log-view-message-re nil t)
 334                         (match-beginning 0)
 335                       (point-max)))
 336               (setq ov (make-overlay beg end))
 337               (overlay-put ov 'face 'log-view-file)
 338               ;; This is used to check if the overlay is present.
 339               (overlay-put ov 'log-view-self ov)
 340               (overlay-put ov 'log-view-marked tag))))))))
 341
 342 (defun log-view-get-marked ()
 343   "Return the list of tags for the marked log entries."
 344   (save-excursion
 345     (let ((pos (point-min))
 346           marked-list ov)
 347       (while (setq pos (next-single-property-change pos 'face))
 348         (when (setq ov (get-char-property pos 'log-view-self))
 349           (push (overlay-get ov 'log-view-marked) marked-list)
 350           (setq pos (overlay-end ov))))
 351       marked-list)))
 352
 353 (defun log-view-beginning-of-defun ()
 354   ;; This assumes that a log entry starts with a line matching
 355   ;; `log-view-message-re'.  Modes that derive from `log-view-mode'
 356   ;; for which this assumption is not valid will have to provide
 357   ;; another implementation of this function.  `log-view-msg-prev'
 358   ;; does a similar job to this function, we can't use it here
 359   ;; directly because it prints messages that are not appropriate in
 360   ;; this context and it does not move to the beginning of the buffer
 361   ;; when the point is before the first log entry.
 362
 363   ;; `log-view-beginning-of-defun' and `log-view-end-of-defun' have
 364   ;; been checked to work with logs produced by RCS, CVS, git,
 365   ;; mercurial and subversion.
 366
 367   (re-search-backward log-view-message-re nil 'move))
 368
 369 (defun log-view-end-of-defun ()
 370   ;; The idea in this function is to search for the beginning of the
 371   ;; next log entry using `log-view-message-re' and then go back one
 372   ;; line when finding it.  Modes that derive from `log-view-mode' for
 373   ;; which this assumption is not valid will have to provide another
 374   ;; implementation of this function.
 375
 376   ;; Look back and if there is no entry there it means we are before
 377   ;; the first log entry, so go forward until finding one.
 378   (unless (save-excursion (re-search-backward log-view-message-re nil t))
 379     (re-search-forward log-view-message-re nil t))
 380
 381   ;; In case we are at the end of log entry going forward a line will
 382   ;; make us find the next entry when searching. If we are inside of
 383   ;; an entry going forward a line will still keep the point inside
 384   ;; the same entry.
 385   (forward-line 1)
 386
 387   ;; In case we are at the beginning of an entry, move past it.
 388   (when (looking-at log-view-message-re)
 389     (goto-char (match-end 0))
 390     (forward-line 1))
 391
 392   ;; Search for the start of the next log entry.  Go to the end of the
 393   ;; buffer if we could not find a next entry.
 394   (when (re-search-forward log-view-message-re nil 'move)
 395     (goto-char (match-beginning 0))
 396     (forward-line -1)))
 397
 398 (defvar cvs-minor-current-files)
 399 (defvar cvs-branch-prefix)
 400 (defvar cvs-secondary-branch-prefix)
 401
 402 (defun log-view-minor-wrap (buf f)
 403   (let ((data (with-current-buffer buf
 404                 (let* ((beg (point))
 405                        (end (if mark-active (mark) (point)))
 406                        (fr (log-view-current-tag beg))
 407                        (to (log-view-current-tag end)))
 408                   (when (string-equal fr to)
 409                     (save-excursion
 410                       (goto-char end)
 411                       (log-view-msg-next)
 412                       (setq to (log-view-current-tag))))
 413                   (cons
 414                    ;; The first revision has to be the one at point, for
 415                    ;; operations that only take one revision
 416                    ;; (e.g. cvs-mode-edit).
 417                    (cons (log-view-current-file) fr)
 418                    (cons (log-view-current-file) to))))))
 419     (let ((cvs-branch-prefix (cdar data))
 420           (cvs-secondary-branch-prefix (and (cdar data) (cddr data)))
 421           (cvs-minor-current-files
 422            (cons (caar data)
 423                  (when (and (cadr data) (not (equal (caar data) (cadr data))))
 424                    (list (cadr data)))))
 425           ;; FIXME:  I need to force because the fileinfos are UNKNOWN
 426           (cvs-force-command "/F"))
 427       (funcall f))))
 428
 429 (defun log-view-find-revision (pos)
 430   "Visit the version at point."
 431   (interactive "d")
 432   (unless log-view-per-file-logs
 433     (when (> (length log-view-vc-fileset) 1)
 434       (error "Multiple files shown in this buffer, cannot use this command here")))
 435   (save-excursion
 436     (goto-char pos)
 437     (switch-to-buffer (vc-find-revision (if log-view-per-file-logs
 438                                             (log-view-current-file)
 439                                           (car log-view-vc-fileset))
 440                                         (log-view-current-tag)))))
 441
 442
 443 (defun log-view-extract-comment ()
 444   "Parse comment from around the current point in the log."
 445   (save-excursion
 446     (let (st en (backend (vc-backend (log-view-current-file))))
 447       (log-view-end-of-defun)
 448       (cond ((eq backend 'SVN)
 449              (forward-line -1)))
 450       (setq en (point))
 451       (log-view-beginning-of-defun)
 452       (cond ((memq backend '(SCCS RCS CVS MCVS SVN))
 453              (forward-line 2))
 454             ((eq backend 'Hg)
 455              (forward-line 4)
 456              (re-search-forward "summary: *" nil t)))
 457       (setq st (point))
 458       (buffer-substring st en))))
 459
 460 (declare-function vc-modify-change-comment "vc" (files rev oldcomment))
 461
 462 (defun log-view-modify-change-comment ()
 463   "Edit the change comment displayed at point."
 464   (interactive)
 465   (vc-modify-change-comment (list (if log-view-per-file-logs
 466                                       (log-view-current-file)
 467                                     (car log-view-vc-fileset)))
 468                             (log-view-current-tag)
 469                             (log-view-extract-comment)))
 470
 471 (defun log-view-annotate-version (pos)
 472   "Annotate the version at point."
 473   (interactive "d")
 474   (unless log-view-per-file-logs
 475     (when (> (length log-view-vc-fileset) 1)
 476       (error "Multiple files shown in this buffer, cannot use this command here")))
 477   (save-excursion
 478     (goto-char pos)
 479     (vc-annotate (if log-view-per-file-logs
 480                      (log-view-current-file)
 481                    (car log-view-vc-fileset))
 482                  (log-view-current-tag))))
 483
 484 ;;
 485 ;; diff
 486 ;;
 487
 488 (defun log-view-diff (beg end)
 489   "Get the diff between two revisions.
 490 If the mark is not active or the mark is on the revision at point,
 491 get the diff between the revision at point and its previous revision.
 492 Otherwise, get the diff between the revisions where the region starts
 493 and ends.
 494 Contrary to `log-view-diff-changeset', it will only show the part of the
 495 changeset that affected the currently considered file(s)."
 496   (interactive
 497    (list (if mark-active (region-beginning) (point))
 498          (if mark-active (region-end) (point))))
 499   (let ((fr (log-view-current-tag beg))
 500         (to (log-view-current-tag end)))
 501     (when (string-equal fr to)
 502       (save-excursion
 503         (goto-char end)
 504         (log-view-msg-next)
 505         (setq to (log-view-current-tag))))
 506     (vc-diff-internal
 507      t (list log-view-vc-backend
 508              (if log-view-per-file-logs
 509                  (list (log-view-current-file))
 510                log-view-vc-fileset))
 511      to fr)))
 512
 513 (declare-function vc-diff-internal "vc"
 514                   (async vc-fileset rev1 rev2 &optional verbose))
 515
 516 (defun log-view-diff-changeset (beg end)
 517   "Get the diff between two revisions.
 518 If the mark is not active or the mark is on the revision at point,
 519 get the diff between the revision at point and its previous revision.
 520 Otherwise, get the diff between the revisions where the region starts
 521 and ends.
 522 Contrary to `log-view-diff', it will show the whole changeset including
 523 the changes that affected other files than the currently considered file(s)."
 524   (interactive
 525    (list (if mark-active (region-beginning) (point))
 526          (if mark-active (region-end) (point))))
 527   (when (eq (vc-call-backend log-view-vc-backend 'revision-granularity) 'file)
 528     (error "The %s backend does not support changeset diffs" log-view-vc-backend))
 529   (let ((fr (log-view-current-tag beg))
 530         (to (log-view-current-tag end)))
 531     (when (string-equal fr to)
 532       ;; TO and FR are the same, look at the previous revision.
 533       (setq to (vc-call-backend log-view-vc-backend 'previous-revision nil fr)))
 534     (vc-diff-internal
 535      t
 536      ;; We want to see the diff for all the files in the changeset, so
 537      ;; pass NIL for the file list.  The value passed here should
 538      ;; follow what `vc-deduce-fileset' returns.
 539      (list log-view-vc-backend nil)
 540      to fr)))
 541
 542 (provide 'log-view)
 543
 544 ;; arch-tag: 0d64220b-ce7e-4f62-9c2a-6b04c2f81f4f
 545 ;;; log-view.el ends here