lisp/add-log.el

   1 ;;; add-log.el --- change log maintenance commands for Emacs
   2
   3 ;; Copyright (C) 1985, 1986, 1988, 1993, 1994, 1997, 1998, 2000, 2002,
   4 ;;   2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: 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 2, or (at your option)
  14 ;; 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; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Commentary:
  27
  28 ;; This facility is documented in the Emacs Manual.
  29
  30 ;;; Code:
  31
  32 (eval-when-compile
  33   (require 'timezone))
  34
  35 (defgroup change-log nil
  36   "Change log maintenance."
  37   :group 'tools
  38   :link '(custom-manual "(emacs)Change Log")
  39   :prefix "change-log-"
  40   :prefix "add-log-")
  41
  42
  43 (defcustom change-log-default-name nil
  44   "*Name of a change log file for \\[add-change-log-entry]."
  45   :type '(choice (const :tag "default" nil)
  46                  string)
  47   :group 'change-log)
  48 (put 'change-log-default-name 'safe-local-variable 'string-or-null-p)
  49
  50 (defcustom change-log-mode-hook nil
  51   "Normal hook run by `change-log-mode'."
  52   :type 'hook
  53   :group 'change-log)
  54
  55 ;; Many modes set this variable, so avoid warnings.
  56 ;;;###autoload
  57 (defcustom add-log-current-defun-function nil
  58   "*If non-nil, function to guess name of surrounding function.
  59 It is used by `add-log-current-defun' in preference to built-in rules.
  60 Returns function's name as a string, or nil if outside a function."
  61   :type '(choice (const nil) function)
  62   :group 'change-log)
  63
  64 ;;;###autoload
  65 (defcustom add-log-full-name nil
  66   "*Full name of user, for inclusion in ChangeLog daily headers.
  67 This defaults to the value returned by the function `user-full-name'."
  68   :type '(choice (const :tag "Default" nil)
  69                  string)
  70   :group 'change-log)
  71
  72 ;;;###autoload
  73 (defcustom add-log-mailing-address nil
  74   "Email addresses of user, for inclusion in ChangeLog headers.
  75 This defaults to the value of `user-mail-address'.  In addition to
  76 being a simple string, this value can also be a list.  All elements
  77 will be recognized as referring to the same user; when creating a new
  78 ChangeLog entry, one element will be chosen at random."
  79   :type '(choice (const :tag "Default" nil)
  80                  (string :tag "String")
  81                  (repeat :tag "List of Strings" string))
  82   :group 'change-log)
  83
  84 (defcustom add-log-time-format 'add-log-iso8601-time-string
  85   "Function that defines the time format.
  86 For example, `add-log-iso8601-time-string', which gives the
  87 date in international ISO 8601 format,
  88 and `current-time-string' are two valid values."
  89   :type '(radio (const :tag "International ISO 8601 format"
  90                        add-log-iso8601-time-string)
  91                 (const :tag "Old format, as returned by `current-time-string'"
  92                        current-time-string)
  93                 (function :tag "Other"))
  94   :group 'change-log)
  95
  96 (defcustom add-log-keep-changes-together nil
  97   "If non-nil, normally keep day's log entries for one file together.
  98
  99 Log entries for a given file made with \\[add-change-log-entry] or
 100 \\[add-change-log-entry-other-window] will only be added to others \
 101 for that file made
 102 today if this variable is non-nil or that file comes first in today's
 103 entries.  Otherwise another entry for that file will be started.  An
 104 original log:
 105
 106         * foo (...): ...
 107         * bar (...): change 1
 108
 109 in the latter case, \\[add-change-log-entry-other-window] in a \
 110 buffer visiting `bar', yields:
 111
 112         * bar (...): -!-
 113         * foo (...): ...
 114         * bar (...): change 1
 115
 116 and in the former:
 117
 118         * foo (...): ...
 119         * bar (...): change 1
 120         (...): -!-
 121
 122 The NEW-ENTRY arg to `add-change-log-entry' can override the effect of
 123 this variable."
 124   :version "20.3"
 125   :type 'boolean
 126   :group 'change-log)
 127
 128 (defcustom add-log-always-start-new-record nil
 129   "If non-nil, `add-change-log-entry' will always start a new record."
 130   :version "22.1"
 131   :type 'boolean
 132   :group 'change-log)
 133
 134 (defcustom add-log-buffer-file-name-function nil
 135   "If non-nil, function to call to identify the full filename of a buffer.
 136 This function is called with no argument.  If this is nil, the default is to
 137 use `buffer-file-name'."
 138   :type '(choice (const nil) function)
 139   :group 'change-log)
 140
 141 (defcustom add-log-file-name-function nil
 142   "If non-nil, function to call to identify the filename for a ChangeLog entry.
 143 This function is called with one argument, the value of variable
 144 `buffer-file-name' in that buffer.  If this is nil, the default is to
 145 use the file's name relative to the directory of the change log file."
 146   :type '(choice (const nil) function)
 147   :group 'change-log)
 148
 149
 150 (defcustom change-log-version-info-enabled nil
 151   "*If non-nil, enable recording version numbers with the changes."
 152   :version "21.1"
 153   :type 'boolean
 154   :group 'change-log)
 155
 156 (defcustom change-log-version-number-regexp-list
 157   (let ((re    "\\([0-9]+\.[0-9.]+\\)"))
 158     (list
 159      ;;  (defconst ad-version "2.15"
 160      (concat "^(def[^ \t\n]+[ \t]+[^ \t\n][ \t]\"" re)
 161      ;; Revision: pcl-cvs.el,v 1.72 1999/09/05 20:21:54 monnier Exp
 162      (concat "^;+ *Revision: +[^ \t\n]+[ \t]+" re)))
 163   "*List of regexps to search for version number.
 164 The version number must be in group 1.
 165 Note: The search is conducted only within 10%, at the beginning of the file."
 166   :version "21.1"
 167   :type '(repeat regexp)
 168   :group 'change-log)
 169
 170 (defface change-log-date
 171   '((t (:inherit font-lock-string-face)))
 172   "Face used to highlight dates in date lines."
 173   :version "21.1"
 174   :group 'change-log)
 175 ;; backward-compatibility alias
 176 (put 'change-log-date-face 'face-alias 'change-log-date)
 177
 178 (defface change-log-name
 179   '((t (:inherit font-lock-constant-face)))
 180   "Face for highlighting author names."
 181   :version "21.1"
 182   :group 'change-log)
 183 ;; backward-compatibility alias
 184 (put 'change-log-name-face 'face-alias 'change-log-name)
 185
 186 (defface change-log-email
 187   '((t (:inherit font-lock-variable-name-face)))
 188   "Face for highlighting author email addresses."
 189   :version "21.1"
 190   :group 'change-log)
 191 ;; backward-compatibility alias
 192 (put 'change-log-email-face 'face-alias 'change-log-email)
 193
 194 (defface change-log-file
 195   '((t (:inherit font-lock-function-name-face)))
 196   "Face for highlighting file names."
 197   :version "21.1"
 198   :group 'change-log)
 199 ;; backward-compatibility alias
 200 (put 'change-log-file-face 'face-alias 'change-log-file)
 201
 202 (defface change-log-list
 203   '((t (:inherit font-lock-keyword-face)))
 204   "Face for highlighting parenthesized lists of functions or variables."
 205   :version "21.1"
 206   :group 'change-log)
 207 ;; backward-compatibility alias
 208 (put 'change-log-list-face 'face-alias 'change-log-list)
 209
 210 (defface change-log-conditionals
 211   '((t (:inherit font-lock-variable-name-face)))
 212   "Face for highlighting conditionals of the form `[...]'."
 213   :version "21.1"
 214   :group 'change-log)
 215 ;; backward-compatibility alias
 216 (put 'change-log-conditionals-face 'face-alias 'change-log-conditionals)
 217
 218 (defface change-log-function
 219   '((t (:inherit font-lock-variable-name-face)))
 220   "Face for highlighting items of the form `<....>'."
 221   :version "21.1"
 222   :group 'change-log)
 223 ;; backward-compatibility alias
 224 (put 'change-log-function-face 'face-alias 'change-log-function)
 225
 226 (defface change-log-acknowledgement
 227   '((t (:inherit font-lock-comment-face)))
 228   "Face for highlighting acknowledgments."
 229   :version "21.1"
 230   :group 'change-log)
 231 ;; backward-compatibility alias
 232 (put 'change-log-acknowledgement-face 'face-alias 'change-log-acknowledgement)
 233
 234 (defvar change-log-font-lock-keywords
 235   '(;;
 236     ;; Date lines, new (2000-01-01) and old (Sat Jan  1 00:00:00 2000) styles.
 237     ;; Fixme: this regepx is just an approximate one and may match
 238     ;; wrongly with a non-date line existing as a random note.  In
 239     ;; addition, using any kind of fixed setting like this doesn't
 240     ;; work if a user customizes add-log-time-format.
 241     ("^[0-9-]+ +\\|^\\(Sun\\|Mon\\|Tue\\|Wed\\|Thu\\|Fri\\|Sat\\) [A-z][a-z][a-z] [0-9:+ ]+"
 242      (0 'change-log-date-face)
 243      ;; Name and e-mail; some people put e-mail in parens, not angles.
 244      ("\\([^<(]+?\\)[ \t]*[(<]\\([A-Za-z0-9_.+-]+@[A-Za-z0-9_.-]+\\)[>)]" nil nil
 245       (1 'change-log-name)
 246       (2 'change-log-email)))
 247     ;;
 248     ;; File names.
 249     ("^\\( +\\|\t\\)\\* \\([^ ,:([\n]+\\)"
 250      (2 'change-log-file)
 251      ;; Possibly further names in a list:
 252      ("\\=, \\([^ ,:([\n]+\\)" nil nil (1 'change-log-file))
 253      ;; Possibly a parenthesized list of names:
 254      ("\\= (\\([^(),\n]+\\|(\\(setf\\|SETF\\) [^() ,\n]+)\\)"
 255       nil nil (1 'change-log-list))
 256      ("\\=, *\\([^(),\n]+\\|(\\(setf\\|SETF\\) [^() ,\n]+)\\)"
 257       nil nil (1 'change-log-list)))
 258     ;;
 259     ;; Function or variable names.
 260     ("^\\( +\\|\t\\)(\\([^(),\n]+\\|(\\(setf\\|SETF\\) [^() ,\n]+)\\)"
 261      (2 'change-log-list)
 262      ("\\=, *\\([^(),\n]+\\|(\\(setf\\|SETF\\) [^() ,\n]+)\\)" nil nil
 263       (1 'change-log-list)))
 264     ;;
 265     ;; Conditionals.
 266     ("\\[!?\\([^]\n]+\\)\\]\\(:\\| (\\)" (1 'change-log-conditionals))
 267     ;;
 268     ;; Function of change.
 269     ("<\\([^>\n]+\\)>\\(:\\| (\\)" (1 'change-log-function))
 270     ;;
 271     ;; Acknowledgements.
 272     ;; Don't include plain "From" because that is vague;
 273     ;; we want to encourage people to say something more specific.
 274     ;; Note that the FSF does not use "Patches by"; our convention
 275     ;; is to put the name of the author of the changes at the top
 276     ;; of the change log entry.
 277     ("\\(^\\( +\\|\t\\)\\|  \\)\\(Patch\\(es\\)? by\\|Report\\(ed by\\| from\\)\\|Suggest\\(ed by\\|ion from\\)\\)"
 278      3 'change-log-acknowledgement))
 279   "Additional expressions to highlight in Change Log mode.")
 280
 281 (defvar change-log-mode-map
 282   (let ((map (make-sparse-keymap)))
 283     (define-key map [?\C-c ?\C-p] 'add-log-edit-prev-comment)
 284     (define-key map [?\C-c ?\C-n] 'add-log-edit-next-comment)
 285     map)
 286   "Keymap for Change Log major mode.")
 287
 288 ;; It used to be called change-log-time-zone-rule but really should be
 289 ;; called add-log-time-zone-rule since it's only used from add-log-* code.
 290 (defvaralias 'change-log-time-zone-rule 'add-log-time-zone-rule)
 291 (defvar add-log-time-zone-rule nil
 292   "Time zone used for calculating change log time stamps.
 293 It takes the same format as the TZ argument of `set-time-zone-rule'.
 294 If nil, use local time.
 295 If t, use universal time.")
 296
 297 (defun add-log-iso8601-time-zone (&optional time)
 298   (let* ((utc-offset (or (car (current-time-zone time)) 0))
 299          (sign (if (< utc-offset 0) ?- ?+))
 300          (sec (abs utc-offset))
 301          (ss (% sec 60))
 302          (min (/ sec 60))
 303          (mm (% min 60))
 304          (hh (/ min 60)))
 305     (format (cond ((not (zerop ss)) "%c%02d:%02d:%02d")
 306                   ((not (zerop mm)) "%c%02d:%02d")
 307                   (t "%c%02d"))
 308             sign hh mm ss)))
 309
 310 (defvar add-log-iso8601-with-time-zone nil)
 311
 312 (defun add-log-iso8601-time-string ()
 313   (let ((time (format-time-string "%Y-%m-%d"
 314                                   nil (eq t add-log-time-zone-rule))))
 315     (if add-log-iso8601-with-time-zone
 316         (concat time " " (add-log-iso8601-time-zone))
 317       time)))
 318
 319 (defun change-log-name ()
 320   "Return (system-dependent) default name for a change log file."
 321   (or change-log-default-name
 322       (if (eq system-type 'vax-vms)
 323           "$CHANGE_LOG$.TXT"
 324         "ChangeLog")))
 325
 326 (defun add-log-edit-prev-comment (arg)
 327   "Cycle backward through Log-Edit mode comment history.
 328 With a numeric prefix ARG, go back ARG comments."
 329   (interactive "*p")
 330   (save-restriction
 331     (narrow-to-region (point)
 332                       (if (memq last-command '(add-log-edit-prev-comment
 333                                                add-log-edit-next-comment))
 334                           (mark) (point)))
 335     (when (fboundp 'log-edit-previous-comment)
 336       (log-edit-previous-comment arg)
 337       (indent-region (point-min) (point-max))
 338       (goto-char (point-min))
 339       (unless (save-restriction (widen) (bolp))
 340         (delete-region (point) (progn (skip-chars-forward " \t\n") (point))))
 341       (set-mark (point-min))
 342       (goto-char (point-max))
 343       (delete-region (point) (progn (skip-chars-backward " \t\n") (point))))))
 344
 345 (defun add-log-edit-next-comment (arg)
 346   "Cycle forward through Log-Edit mode comment history.
 347 With a numeric prefix ARG, go back ARG comments."
 348   (interactive "*p")
 349   (add-log-edit-prev-comment (- arg)))
 350
 351 ;;;###autoload
 352 (defun prompt-for-change-log-name ()
 353   "Prompt for a change log name."
 354   (let* ((default (change-log-name))
 355          (name (expand-file-name
 356                 (read-file-name (format "Log file (default %s): " default)
 357                                 nil default))))
 358     ;; Handle something that is syntactically a directory name.
 359     ;; Look for ChangeLog or whatever in that directory.
 360     (if (string= (file-name-nondirectory name) "")
 361         (expand-file-name (file-name-nondirectory default)
 362                           name)
 363       ;; Handle specifying a file that is a directory.
 364       (if (file-directory-p name)
 365           (expand-file-name (file-name-nondirectory default)
 366                             (file-name-as-directory name))
 367         name))))
 368
 369 (defun change-log-version-number-search ()
 370   "Return version number of current buffer's file.
 371 This is the value returned by `vc-workfile-version' or, if that is
 372 nil, by matching `change-log-version-number-regexp-list'."
 373   (let* ((size (buffer-size))
 374          (limit
 375           ;; The version number can be anywhere in the file, but
 376           ;; restrict search to the file beginning: 10% should be
 377           ;; enough to prevent some mishits.
 378           ;;
 379           ;; Apply percentage only if buffer size is bigger than
 380           ;; approx 100 lines.
 381           (if (> size (* 100 80)) (+ (point) (/ size 10)))))
 382     (or (and buffer-file-name (vc-workfile-version buffer-file-name))
 383         (save-restriction
 384           (widen)
 385           (let ((regexps change-log-version-number-regexp-list)
 386                 version)
 387             (while regexps
 388               (save-excursion
 389                 (goto-char (point-min))
 390                 (when (re-search-forward (pop regexps) limit t)
 391                   (setq version (match-string 1)
 392                         regexps nil))))
 393             version)))))
 394
 395
 396 ;;;###autoload
 397 (defun find-change-log (&optional file-name buffer-file)
 398   "Find a change log file for \\[add-change-log-entry] and return the name.
 399
 400 Optional arg FILE-NAME specifies the file to use.
 401 If FILE-NAME is nil, use the value of `change-log-default-name'.
 402 If `change-log-default-name' is nil, behave as though it were 'ChangeLog'
 403 \(or whatever we use on this operating system).
 404
 405 If `change-log-default-name' contains a leading directory component, then
 406 simply find it in the current directory.  Otherwise, search in the current
 407 directory and its successive parents for a file so named.
 408
 409 Once a file is found, `change-log-default-name' is set locally in the
 410 current buffer to the complete file name.
 411 Optional arg BUFFER-FILE overrides `buffer-file-name'."
 412   ;; If user specified a file name or if this buffer knows which one to use,
 413   ;; just use that.
 414   (or file-name
 415       (setq file-name (and change-log-default-name
 416                            (file-name-directory change-log-default-name)
 417                            change-log-default-name))
 418       (progn
 419         ;; Chase links in the source file
 420         ;; and use the change log in the dir where it points.
 421         (setq file-name (or (and (or buffer-file buffer-file-name)
 422                                  (file-name-directory
 423                                   (file-chase-links
 424                                    (or buffer-file buffer-file-name))))
 425                             default-directory))
 426         (if (file-directory-p file-name)
 427             (setq file-name (expand-file-name (change-log-name) file-name)))
 428         ;; Chase links before visiting the file.
 429         ;; This makes it easier to use a single change log file
 430         ;; for several related directories.
 431         (setq file-name (file-chase-links file-name))
 432         (setq file-name (expand-file-name file-name))
 433         ;; Move up in the dir hierarchy till we find a change log file.
 434         (let ((file1 file-name)
 435               parent-dir)
 436           (while (and (not (or (get-file-buffer file1) (file-exists-p file1)))
 437                       (progn (setq parent-dir
 438                                    (file-name-directory
 439                                     (directory-file-name
 440                                      (file-name-directory file1))))
 441                              ;; Give up if we are already at the root dir.
 442                              (not (string= (file-name-directory file1)
 443                                            parent-dir))))
 444             ;; Move up to the parent dir and try again.
 445             (setq file1 (expand-file-name
 446                          (file-name-nondirectory (change-log-name))
 447                          parent-dir)))
 448           ;; If we found a change log in a parent, use that.
 449           (if (or (get-file-buffer file1) (file-exists-p file1))
 450               (setq file-name file1)))))
 451   ;; Make a local variable in this buffer so we needn't search again.
 452   (set (make-local-variable 'change-log-default-name) file-name)
 453   file-name)
 454
 455 (defun add-log-file-name (buffer-file log-file)
 456   ;; Never want to add a change log entry for the ChangeLog file itself.
 457   (unless (or (null buffer-file) (string= buffer-file log-file))
 458     (if add-log-file-name-function
 459         (funcall add-log-file-name-function buffer-file)
 460       (setq buffer-file
 461             (if (string-match
 462                  (concat "^" (regexp-quote (file-name-directory log-file)))
 463                  buffer-file)
 464                 (substring buffer-file (match-end 0))
 465               (file-name-nondirectory buffer-file)))
 466       ;; If we have a backup file, it's presumably because we're
 467       ;; comparing old and new versions (e.g. for deleted
 468       ;; functions) and we'll want to use the original name.
 469       (if (backup-file-name-p buffer-file)
 470           (file-name-sans-versions buffer-file)
 471         buffer-file))))
 472
 473 ;;;###autoload
 474 (defun add-change-log-entry (&optional whoami file-name other-window new-entry)
 475   "Find change log file, and add an entry for today and an item for this file.
 476 Optional arg WHOAMI (interactive prefix) non-nil means prompt for user
 477 name and email (stored in `add-log-full-name' and `add-log-mailing-address').
 478
 479 Second arg FILE-NAME is file name of the change log.
 480 If nil, use the value of `change-log-default-name'.
 481
 482 Third arg OTHER-WINDOW non-nil means visit in other window.
 483
 484 Fourth arg NEW-ENTRY non-nil means always create a new entry at the front;
 485 never append to an existing entry.  Option `add-log-keep-changes-together'
 486 otherwise affects whether a new entry is created.
 487
 488 Option `add-log-always-start-new-record' non-nil means always create a
 489 new record, even when the last record was made on the same date and by
 490 the same person.
 491
 492 The change log file can start with a copyright notice and a copying
 493 permission notice.  The first blank line indicates the end of these
 494 notices.
 495
 496 Today's date is calculated according to `add-log-time-zone-rule' if
 497 non-nil, otherwise in local time."
 498   (interactive (list current-prefix-arg
 499                      (prompt-for-change-log-name)))
 500   (let* ((defun (add-log-current-defun))
 501          (version (and change-log-version-info-enabled
 502                        (change-log-version-number-search)))
 503          (buf-file-name (if add-log-buffer-file-name-function
 504                             (funcall add-log-buffer-file-name-function)
 505                           buffer-file-name))
 506          (buffer-file (if buf-file-name (expand-file-name buf-file-name)))
 507          (file-name (expand-file-name (find-change-log file-name buffer-file)))
 508          ;; Set ITEM to the file name to use in the new item.
 509          (item (add-log-file-name buffer-file file-name))
 510          bound
 511          (full-name (or add-log-full-name (user-full-name)))
 512          (mailing-address (or add-log-mailing-address user-mail-address)))
 513
 514     (if whoami
 515         (progn
 516           (setq full-name (read-string "Full name: " full-name))
 517           ;; Note that some sites have room and phone number fields in
 518           ;; full name which look silly when inserted.  Rather than do
 519           ;; anything about that here, let user give prefix argument so that
 520           ;; s/he can edit the full name field in prompter if s/he wants.
 521           (setq mailing-address
 522                 (read-string "Mailing address: " mailing-address))))
 523
 524     (unless (equal file-name buffer-file-name)
 525       (if (or other-window (window-dedicated-p (selected-window)))
 526           (find-file-other-window file-name)
 527         (find-file file-name)))
 528     (or (eq major-mode 'change-log-mode)
 529         (change-log-mode))
 530     (undo-boundary)
 531     (goto-char (point-min))
 532
 533     ;; If file starts with a copyright and permission notice, skip them.
 534     ;; Assume they end at first blank line.
 535     (when (looking-at "Copyright")
 536       (search-forward "\n\n")
 537       (skip-chars-forward "\n"))
 538
 539     ;; Advance into first entry if it is usable; else make new one.
 540     (let ((new-entries
 541            (mapcar (lambda (addr)
 542                      (concat
 543                       (if (stringp add-log-time-zone-rule)
 544                           (let ((tz (getenv "TZ")))
 545                             (unwind-protect
 546                                 (progn
 547                                   (set-time-zone-rule add-log-time-zone-rule)
 548                                   (funcall add-log-time-format))
 549                               (set-time-zone-rule tz)))
 550                         (funcall add-log-time-format))
 551                       "  " full-name
 552                       "  <" addr ">"))
 553                    (if (consp mailing-address)
 554                        mailing-address
 555                      (list mailing-address)))))
 556       (if (and (not add-log-always-start-new-record)
 557                (let ((hit nil))
 558                  (dolist (entry new-entries hit)
 559                    (when (looking-at (regexp-quote entry))
 560                      (setq hit t)))))
 561           (forward-line 1)
 562         (insert (nth (random (length new-entries))
 563                      new-entries)
 564                 (if use-hard-newlines hard-newline "\n")
 565                 (if use-hard-newlines hard-newline "\n"))
 566         (forward-line -1)))
 567
 568     ;; Determine where we should stop searching for a usable
 569     ;; item to add to, within this entry.
 570     (setq bound
 571           (save-excursion
 572             (if (looking-at "\n*[^\n* \t]")
 573                 (skip-chars-forward "\n")
 574               (if add-log-keep-changes-together
 575                   (forward-page)        ; page delimits entries for date
 576                 (forward-paragraph)))   ; paragraph delimits entries for file
 577             (point)))
 578
 579     ;; Now insert the new line for this item.
 580     (cond ((re-search-forward "^\\s *\\*\\s *$" bound t)
 581            ;; Put this file name into the existing empty item.
 582            (if item
 583                (insert item)))
 584           ((and (not new-entry)
 585                 (let (case-fold-search)
 586                   (re-search-forward
 587                    (concat (regexp-quote (concat "* " item))
 588                            ;; Don't accept `foo.bar' when
 589                            ;; looking for `foo':
 590                            "\\(\\s \\|[(),:]\\)")
 591                    bound t)))
 592            ;; Add to the existing item for the same file.
 593            (re-search-forward "^\\s *$\\|^\\s \\*")
 594            (goto-char (match-beginning 0))
 595            ;; Delete excess empty lines; make just 2.
 596            (while (and (not (eobp)) (looking-at "^\\s *$"))
 597              (delete-region (point) (line-beginning-position 2)))
 598            (insert (if use-hard-newlines hard-newline "\n")
 599                    (if use-hard-newlines hard-newline "\n"))
 600            (forward-line -2)
 601            (indent-relative-maybe))
 602           (t
 603            ;; Make a new item.
 604            (while (looking-at "\\sW")
 605              (forward-line 1))
 606            (while (and (not (eobp)) (looking-at "^\\s *$"))
 607              (delete-region (point) (line-beginning-position 2)))
 608            (insert (if use-hard-newlines hard-newline "\n")
 609                    (if use-hard-newlines hard-newline "\n")
 610                    (if use-hard-newlines hard-newline "\n"))
 611            (forward-line -2)
 612            (indent-to left-margin)
 613            (insert "* ")
 614            (if item (insert item))))
 615     ;; Now insert the function name, if we have one.
 616     ;; Point is at the item for this file,
 617     ;; either at the end of the line or at the first blank line.
 618     (if (not defun)
 619         ;; No function name, so put in a colon unless we have just a star.
 620         (unless (save-excursion
 621                   (beginning-of-line 1)
 622                   (looking-at "\\s *\\(\\*\\s *\\)?$"))
 623           (insert ": ")
 624           (if version (insert version ?\s)))
 625       ;; Make it easy to get rid of the function name.
 626       (undo-boundary)
 627       (unless (save-excursion
 628                 (beginning-of-line 1)
 629                 (looking-at "\\s *$"))
 630         (insert ?\s))
 631       ;; See if the prev function name has a message yet or not.
 632       ;; If not, merge the two items.
 633       (let ((pos (point-marker)))
 634         (skip-syntax-backward " ")
 635         (skip-chars-backward "):")
 636         (if (and (looking-at "):")
 637                  (let ((pos (save-excursion (backward-sexp 1) (point))))
 638                    (when (equal (buffer-substring pos (point)) defun)
 639                      (delete-region pos (point)))
 640                    (> fill-column (+ (current-column) (length defun) 4))))
 641             (progn (skip-chars-backward ", ")
 642                    (delete-region (point) pos)
 643                    (unless (memq (char-before) '(?\()) (insert ", ")))
 644           (if (looking-at "):")
 645               (delete-region (+ 1 (point)) (line-end-position)))
 646           (goto-char pos)
 647           (insert "("))
 648         (set-marker pos nil))
 649       (insert defun "): ")
 650       (if version (insert version ?\s)))))
 651
 652 ;;;###autoload
 653 (defun add-change-log-entry-other-window (&optional whoami file-name)
 654   "Find change log file in other window and add entry and item.
 655 This is just like `add-change-log-entry' except that it displays
 656 the change log file in another window."
 657   (interactive (if current-prefix-arg
 658                    (list current-prefix-arg
 659                          (prompt-for-change-log-name))))
 660   (add-change-log-entry whoami file-name t))
 661 ;;;###autoload (define-key ctl-x-4-map "a" 'add-change-log-entry-other-window)
 662
 663 (defvar change-log-indent-text 0)
 664
 665 (defun change-log-indent ()
 666   (let* ((indent
 667           (save-excursion
 668             (beginning-of-line)
 669             (skip-chars-forward " \t")
 670             (cond
 671              ((and (looking-at "\\(.*\\)  [^ \n].*[^ \n]  <.*>\\(?: +(.*)\\)? *$")
 672                    ;; Matching the output of add-log-time-format is difficult,
 673                    ;; but I'll get it has at least two adjacent digits.
 674                    (string-match "[[:digit:]][[:digit:]]" (match-string 1)))
 675               0)
 676              ((looking-at "[^*(]")
 677               (+ (current-left-margin) change-log-indent-text))
 678              (t (current-left-margin)))))
 679          (pos (save-excursion (indent-line-to indent) (point))))
 680     (if (> pos (point)) (goto-char pos))))
 681
 682
 683 (defvar smerge-resolve-function)
 684
 685 ;;;###autoload
 686 (define-derived-mode change-log-mode text-mode "Change Log"
 687   "Major mode for editing change logs; like Indented Text Mode.
 688 Prevents numeric backups and sets `left-margin' to 8 and `fill-column' to 74.
 689 New log entries are usually made with \\[add-change-log-entry] or \\[add-change-log-entry-other-window].
 690 Each entry behaves as a paragraph, and the entries for one day as a page.
 691 Runs `change-log-mode-hook'.
 692 \\{change-log-mode-map}"
 693   (setq left-margin 8
 694         fill-column 74
 695         indent-tabs-mode t
 696         tab-width 8)
 697   (set (make-local-variable 'fill-paragraph-function)
 698        'change-log-fill-paragraph)
 699   (set (make-local-variable 'indent-line-function) 'change-log-indent)
 700   (set (make-local-variable 'tab-always-indent) nil)
 701   ;; We really do want "^" in paragraph-start below: it is only the
 702   ;; lines that begin at column 0 (despite the left-margin of 8) that
 703   ;; we are looking for.  Adding `* ' allows eliding the blank line
 704   ;; between entries for different files.
 705   (set (make-local-variable 'paragraph-start) "\\s *$\\|\f\\|^\\<")
 706   (set (make-local-variable 'paragraph-separate) paragraph-start)
 707   ;; Match null string on the date-line so that the date-line
 708   ;; is grouped with what follows.
 709   (set (make-local-variable 'page-delimiter) "^\\<\\|^\f")
 710   (set (make-local-variable 'version-control) 'never)
 711   (set (make-local-variable 'smerge-resolve-function)
 712        'change-log-resolve-conflict)
 713   (set (make-local-variable 'adaptive-fill-regexp) "\\s *")
 714   (set (make-local-variable 'font-lock-defaults)
 715        '(change-log-font-lock-keywords t nil nil backward-paragraph)))
 716
 717 ;; It might be nice to have a general feature to replace this.  The idea I
 718 ;; have is a variable giving a regexp matching text which should not be
 719 ;; moved from bol by filling.  change-log-mode would set this to "^\\s *\\s(".
 720 ;; But I don't feel up to implementing that today.
 721 (defun change-log-fill-paragraph (&optional justify)
 722   "Fill the paragraph, but preserve open parentheses at beginning of lines.
 723 Prefix arg means justify as well."
 724   (interactive "P")
 725   (let ((end (progn (forward-paragraph) (point)))
 726         (beg (progn (backward-paragraph) (point)))
 727         (paragraph-start (concat paragraph-start "\\|\\s *\\s(")))
 728     (fill-region beg end justify)
 729     t))
 730 \f
 731 (defcustom add-log-current-defun-header-regexp
 732   "^\\([[:upper:]][[:upper:]_ ]*[[:upper:]_]\\|[-_[:alpha:]]+\\)[ \t]*[:=]"
 733   "Heuristic regexp used by `add-log-current-defun' for unknown major modes."
 734   :type 'regexp
 735   :group 'change-log)
 736
 737 ;;;###autoload
 738 (defvar add-log-lisp-like-modes
 739   '(emacs-lisp-mode lisp-mode scheme-mode dsssl-mode lisp-interaction-mode)
 740   "*Modes that look like Lisp to `add-log-current-defun'.")
 741
 742 ;;;###autoload
 743 (defvar add-log-c-like-modes
 744   '(c-mode c++-mode c++-c-mode objc-mode)
 745   "*Modes that look like C to `add-log-current-defun'.")
 746
 747 ;;;###autoload
 748 (defvar add-log-tex-like-modes
 749   '(TeX-mode plain-TeX-mode LaTeX-mode plain-tex-mode latex-mode)
 750   "*Modes that look like TeX to `add-log-current-defun'.")
 751
 752 ;;;###autoload
 753 (defun add-log-current-defun ()
 754   "Return name of function definition point is in, or nil.
 755
 756 Understands C, Lisp, LaTeX (\"functions\" are chapters, sections, ...),
 757 Texinfo (@node titles) and Perl.
 758
 759 Other modes are handled by a heuristic that looks in the 10K before
 760 point for uppercase headings starting in the first column or
 761 identifiers followed by `:' or `='.  See variables
 762 `add-log-current-defun-header-regexp' and
 763 `add-log-current-defun-function'.
 764
 765 Has a preference of looking backwards."
 766   (condition-case nil
 767       (save-excursion
 768         (let ((location (point)))
 769           (cond (add-log-current-defun-function
 770                  (funcall add-log-current-defun-function))
 771                 ((memq major-mode add-log-lisp-like-modes)
 772                  ;; If we are now precisely at the beginning of a defun,
 773                  ;; make sure beginning-of-defun finds that one
 774                  ;; rather than the previous one.
 775                  (or (eobp) (forward-char 1))
 776                  (beginning-of-defun)
 777                  ;; Make sure we are really inside the defun found,
 778                  ;; not after it.
 779                  (when (and (looking-at "\\s(")
 780                             (progn (end-of-defun)
 781                                    (< location (point)))
 782                             (progn (forward-sexp -1)
 783                                    (>= location (point))))
 784                    (if (looking-at "\\s(")
 785                        (forward-char 1))
 786                    ;; Skip the defining construct name, typically "defun"
 787                    ;; or "defvar".
 788                    (forward-sexp 1)
 789                    ;; The second element is usually a symbol being defined.
 790                    ;; If it is not, use the first symbol in it.
 791                    (skip-chars-forward " \t\n'(")
 792                    (buffer-substring-no-properties (point)
 793                                                    (progn (forward-sexp 1)
 794                                                           (point)))))
 795                 ((and (memq major-mode add-log-c-like-modes)
 796                       (save-excursion
 797                         (beginning-of-line)
 798                         ;; Use eq instead of = here to avoid
 799                         ;; error when at bob and char-after
 800                         ;; returns nil.
 801                         (while (eq (char-after (- (point) 2)) ?\\)
 802                           (forward-line -1))
 803                         (looking-at "[ \t]*#[ \t]*define[ \t]")))
 804                  ;; Handle a C macro definition.
 805                  (beginning-of-line)
 806                  (while (eq (char-after (- (point) 2)) ?\\) ;not =; note above
 807                    (forward-line -1))
 808                  (search-forward "define")
 809                  (skip-chars-forward " \t")
 810                  (buffer-substring-no-properties (point)
 811                                                  (progn (forward-sexp 1)
 812                                                         (point))))
 813                 ((memq major-mode add-log-c-like-modes)
 814                  (beginning-of-line)
 815                  ;; See if we are in the beginning part of a function,
 816                  ;; before the open brace.  If so, advance forward.
 817                  (while (not (looking-at "{\\|\\(\\s *$\\)"))
 818                    (forward-line 1))
 819                  (or (eobp)
 820                      (forward-char 1))
 821                  (let (maybe-beg)
 822                    ;; Try to find the containing defun.
 823                    (beginning-of-defun)
 824                    (end-of-defun)
 825                    ;; If the defun we found ends before the desired position,
 826                    ;; see if there's a DEFUN construct
 827                    ;; between that end and the desired position.
 828                    (when (save-excursion
 829                            (and (> location (point))
 830                                 (re-search-forward "^DEFUN"
 831                                                    (save-excursion
 832                                                      (goto-char location)
 833                                                      (line-end-position))
 834                                                    t)
 835                                 (re-search-forward "^{" nil t)
 836                                 (setq maybe-beg (point))))
 837                      ;; If so, go to the end of that instead.
 838                      (goto-char maybe-beg)
 839                      (end-of-defun)))
 840                  ;; If the desired position is within the defun we found,
 841                  ;; find the function name.
 842                  (when (< location (point))
 843                    ;; Move back over function body.
 844                    (backward-sexp 1)
 845                    (let (beg)
 846                      ;; Skip back over typedefs and arglist.
 847                      ;; Stop at the function definition itself
 848                      ;; or at the line that follows end of function doc string.
 849                      (forward-line -1)
 850                      (while (and (not (bobp))
 851                                  (looking-at "[ \t\n]")
 852                                  (not (looking-back "[*]/)\n" (- (point) 4))))
 853                        (forward-line -1))
 854                      ;; If we found a doc string, this must be the DEFUN macro
 855                      ;; used in Emacs.  Move back to the DEFUN line.
 856                      (when (looking-back "[*]/)\n" (- (point) 4))
 857                        (backward-sexp 1)
 858                        (beginning-of-line))
 859                      ;; Is this a DEFUN construct?  And is LOCATION in it?
 860                      (if (and (looking-at "DEFUN\\b")
 861                               (>= location (point)))
 862                          ;; DEFUN ("file-name-directory", Ffile_name_directory, Sfile_name_directory, ...) ==> Ffile_name_directory
 863                          ;; DEFUN(POSIX::STREAM-LOCK, stream lockp &key BLOCK SHARED START LENGTH) ==> POSIX::STREAM-LOCK
 864                          (progn
 865                            (down-list 1)
 866                            (when (= (char-after (point)) ?\")
 867                              (forward-sexp 1)
 868                              (search-forward ","))
 869                            (skip-syntax-forward " ")
 870                            (buffer-substring-no-properties
 871                             (point)
 872                             (progn (search-forward ",")
 873                                    (forward-char -1)
 874                                    (skip-syntax-backward " ")
 875                                    (point))))
 876                        (if (looking-at "^[+-]")
 877                            ;; Objective-C
 878                            (change-log-get-method-definition)
 879                          ;; Ordinary C function syntax.
 880                          (setq beg (point))
 881                          (if (and
 882                               ;; Protect against "Unbalanced parens" error.
 883                               (condition-case nil
 884                                   (progn
 885                                     (down-list 1) ; into arglist
 886                                     (backward-up-list 1)
 887                                     (skip-chars-backward " \t")
 888                                     t)
 889                                 (error nil))
 890                               ;; Verify initial pos was after
 891                               ;; real start of function.
 892                               (save-excursion
 893                                 (goto-char beg)
 894                                 ;; For this purpose, include the line
 895                                 ;; that has the decl keywords.  This
 896                                 ;; may also include some of the
 897                                 ;; comments before the function.
 898                                 (while (and (not (bobp))
 899                                             (save-excursion
 900                                               (forward-line -1)
 901                                               (looking-at "[^\n\f]")))
 902                                   (forward-line -1))
 903                                 (>= location (point)))
 904                               ;; Consistency check: going down and up
 905                               ;; shouldn't take us back before BEG.
 906                               (> (point) beg))
 907                              (let (end middle)
 908                                ;; Don't include any final whitespace
 909                                ;; in the name we use.
 910                                (skip-chars-backward " \t\n")
 911                                (setq end (point))
 912                                (backward-sexp 1)
 913                                ;; Now find the right beginning of the name.
 914                                ;; Include certain keywords if they
 915                                ;; precede the name.
 916                                (setq middle (point))
 917                                (forward-word -1)
 918                                ;; Is this C++ method?
 919                                (when (and (< 2 middle)
 920                                           (string= (buffer-substring (- middle 2)
 921                                                                      middle)
 922                                                    "::"))
 923                                  ;; Include "classname::".
 924                                  (setq middle (point)))
 925                                ;; Ignore these subparts of a class decl
 926                                ;; and move back to the class name itself.
 927                                (while (looking-at "public \\|private ")
 928                                  (skip-chars-backward " \t:")
 929                                  (setq end (point))
 930                                  (backward-sexp 1)
 931                                  (setq middle (point))
 932                                  (forward-word -1))
 933                                (and (bolp)
 934                                     (looking-at
 935                                      "enum \\|struct \\|union \\|class ")
 936                                     (setq middle (point)))
 937                                (goto-char end)
 938                                (when (eq (preceding-char) ?=)
 939                                  (forward-char -1)
 940                                  (skip-chars-backward " \t")
 941                                  (setq end (point)))
 942                                (buffer-substring-no-properties
 943                                 middle end))))))))
 944                 ((memq major-mode add-log-tex-like-modes)
 945                  (if (re-search-backward
 946                       "\\\\\\(sub\\)*\\(section\\|paragraph\\|chapter\\)"
 947                       nil t)
 948                      (progn
 949                        (goto-char (match-beginning 0))
 950                        (buffer-substring-no-properties
 951                         (1+ (point))    ; without initial backslash
 952                         (line-end-position)))))
 953                 ((eq major-mode 'texinfo-mode)
 954                  (if (re-search-backward "^@node[ \t]+\\([^,\n]+\\)" nil t)
 955                      (match-string-no-properties 1)))
 956                 ((memq major-mode '(perl-mode cperl-mode))
 957                  (if (re-search-backward "^sub[ \t]+\\([^({ \t\n]+\\)" nil t)
 958                      (match-string-no-properties 1)))
 959                 ;; Emacs's autoconf-mode installs its own
 960                 ;; `add-log-current-defun-function'.  This applies to
 961                 ;; a different mode apparently for editing .m4
 962                 ;; autoconf source.
 963                 ((eq major-mode 'autoconf-mode)
 964                  (if (re-search-backward
 965                       "^\\(\\(m4_\\)?define\\|A._DEFUN\\)(\\[?\\([A-Za-z0-9_]+\\)" nil t)
 966                      (match-string-no-properties 3)))
 967                 (t
 968                  ;; If all else fails, try heuristics
 969                  (let (case-fold-search
 970                        result)
 971                    (end-of-line)
 972                    (when (re-search-backward
 973                           add-log-current-defun-header-regexp
 974                           (- (point) 10000)
 975                           t)
 976                      (setq result (or (match-string-no-properties 1)
 977                                       (match-string-no-properties 0)))
 978                      ;; Strip whitespace away
 979                      (when (string-match "\\([^ \t\n\r\f].*[^ \t\n\r\f]\\)"
 980                                          result)
 981                        (setq result (match-string-no-properties 1 result)))
 982                      result))))))
 983     (error nil)))
 984
 985 (defvar change-log-get-method-definition-md)
 986
 987 ;; Subroutine used within change-log-get-method-definition.
 988 ;; Add the last match in the buffer to the end of `md',
 989 ;; followed by the string END; move to the end of that match.
 990 (defun change-log-get-method-definition-1 (end)
 991   (setq change-log-get-method-definition-md
 992         (concat change-log-get-method-definition-md
 993                 (match-string 1)
 994                 end))
 995   (goto-char (match-end 0)))
 996
 997 (defun change-log-get-method-definition ()
 998 "For Objective C, return the method name if we are in a method."
 999   (let ((change-log-get-method-definition-md "["))
1000     (save-excursion
1001       (if (re-search-backward "^@implementation\\s-*\\([A-Za-z_]*\\)" nil t)
1002           (change-log-get-method-definition-1 " ")))
1003     (save-excursion
1004       (cond
1005        ((re-search-forward "^\\([-+]\\)[ \t\n\f\r]*\\(([^)]*)\\)?\\s-*" nil t)
1006         (change-log-get-method-definition-1 "")
1007         (while (not (looking-at "[{;]"))
1008           (looking-at
1009            "\\([A-Za-z_]*:?\\)\\s-*\\(([^)]*)\\)?[A-Za-z_]*[ \t\n\f\r]*")
1010           (change-log-get-method-definition-1 ""))
1011         (concat change-log-get-method-definition-md "]"))))))
1012 \f
1013 (defun change-log-sortable-date-at ()
1014   "Return date of log entry in a consistent form for sorting.
1015 Point is assumed to be at the start of the entry."
1016   (require 'timezone)
1017   (if (looking-at "^\\sw.........[0-9:+ ]*")
1018       (let ((date (match-string-no-properties 0)))
1019         (if date
1020             (if (string-match "\\(....\\)-\\(..\\)-\\(..\\)\\s-+" date)
1021                 (concat (match-string 1 date) (match-string 2 date)
1022                         (match-string 3 date))
1023               (condition-case nil
1024                   (timezone-make-date-sortable date)
1025                 (error nil)))))
1026     (error "Bad date")))
1027
1028 (defun change-log-resolve-conflict ()
1029   "Function to be used in `smerge-resolve-function'."
1030   (let ((buf (current-buffer)))
1031     (with-temp-buffer
1032       (insert-buffer-substring buf (match-beginning 1) (match-end 1))
1033       (save-match-data (change-log-mode))
1034       (let ((other-buf (current-buffer)))
1035         (with-current-buffer buf
1036           (save-excursion
1037             (save-restriction
1038               (narrow-to-region (match-beginning 0) (match-end 0))
1039               (replace-match (match-string 3) t t)
1040               (change-log-merge other-buf))))))))
1041
1042 ;;;###autoload
1043 (defun change-log-merge (other-log)
1044   "Merge the contents of change log file OTHER-LOG with this buffer.
1045 Both must be found in Change Log mode (since the merging depends on
1046 the appropriate motion commands).  OTHER-LOG can be either a file name
1047 or a buffer.
1048
1049 Entries are inserted in chronological order.  Both the current and
1050 old-style time formats for entries are supported."
1051   (interactive "*fLog file name to merge: ")
1052   (if (not (eq major-mode 'change-log-mode))
1053       (error "Not in Change Log mode"))
1054   (let ((other-buf (if (bufferp other-log) other-log
1055                      (find-file-noselect other-log)))
1056         (buf (current-buffer))
1057         date1 start end)
1058     (save-excursion
1059       (goto-char (point-min))
1060       (set-buffer other-buf)
1061       (goto-char (point-min))
1062       (if (not (eq major-mode 'change-log-mode))
1063           (error "%s not found in Change Log mode" other-log))
1064       ;; Loop through all the entries in OTHER-LOG.
1065       (while (not (eobp))
1066         (setq date1 (change-log-sortable-date-at))
1067         (setq start (point)
1068               end (progn (forward-page) (point)))
1069         ;; Look for an entry in original buffer that isn't later.
1070         (with-current-buffer buf
1071           (while (and (not (eobp))
1072                       (string< date1 (change-log-sortable-date-at)))
1073             (forward-page))
1074           (if (not (eobp))
1075               (insert-buffer-substring other-buf start end)
1076             ;; At the end of the original buffer, insert a newline to
1077             ;; separate entries and then the rest of the file being
1078             ;; merged.
1079             (unless (or (bobp)
1080                         (and (= ?\n (char-before))
1081                              (or (<= (1- (point)) (point-min))
1082                                  (= ?\n (char-before (1- (point)))))))
1083               (insert (if use-hard-newlines hard-newline "\n")))
1084             ;; Move to the end of it to terminate outer loop.
1085             (with-current-buffer other-buf
1086               (goto-char (point-max)))
1087             (insert-buffer-substring other-buf start)))))))
1088
1089 ;;;###autoload
1090 (defun change-log-redate ()
1091   "Fix any old-style date entries in the current log file to default format."
1092   (interactive)
1093   (require 'timezone)
1094   (save-excursion
1095     (goto-char (point-min))
1096     (while (re-search-forward "^\\sw.........[0-9:+ ]*" nil t)
1097       (unless (= 12 (- (match-end 0) (match-beginning 0)))
1098         (let* ((date (save-match-data
1099                        (timezone-fix-time (match-string 0) nil nil)))
1100                (zone (if (consp (aref date 6))
1101                          (nth 1 (aref date 6)))))
1102           (replace-match (format-time-string
1103                           "%Y-%m-%d  "
1104                           (encode-time (aref date 5)
1105                                        (aref date 4)
1106                                        (aref date 3)
1107                                        (aref date 2)
1108                                        (aref date 1)
1109                                        (aref date 0)
1110                                        zone))))))))
1111
1112 (provide 'add-log)
1113
1114 ;; arch-tag: 81eee6fc-088f-4372-a37f-80ad9620e762
1115 ;;; add-log.el ends here