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