Re: patch: add-log.el: changelog find file under poin

[Dan Nicolaescu <dann@ics.uci.edu>]

Richard Stallman <rms@gnu.org> writes:

  > Would someone please install this, and update NEWS?
  > (Please add a doc string for the new variable.)

I think this code needs a bit of bug fixing before it is ready to be
applied.  For example given this ChangeLog:

	* progmodes/hideif.el (hide-ifdef-initially, hide-ifdef-read-only)
	(hide-ifdef-lines, hide-ifdef-shadow, hide-ifdef-shadow):
	Remove autoload cookies.
	
	* vc.el (vc-diff-sentinel): Do not write a footer if there were
	differences.

If the point is on the hide-ifdef-shadow line, C-c C-f will find vc.el,
not progmodes/hideif.el, which sounds like a bug.

An improvement that would make this even more useful would be that after
finding the file, it should do a search for the item the point is
on. That won't always find the correct function/variable/etc. the log
entry refers to, but it will help the user a lot when it does.


  > From: Jan Nieuwenhuizen <janneke-list@xs4all.nl>
  > To: emacs-devel@gnu.org
  > Content-Type: text/plain
  > Organization: lilypond-design.org
  > Date: Sun, 04 Nov 2007 22:18:12 +0100
  > Mime-Version: 1.0
  > Subject: patch: add-log.el: changelog find file under poin
  > 
  > Hi,
  > 
  > I found this function missing after applying a patch that had minor
  > conflicts in almost every file.
  > 
  > Greetings,
  > Jan.
  > 
  > ChangeLog
  > 2007-11-04  Jan Nieuwenhuizen  <janneke@gnu.org>
  > 
  > 	* add-log.el (change-log-search-file-name, change-log-find-file):
  > 	New function.
  > 	(change-log-mode-map): New binding C-c C-f to change-log-find-file.
  > 
  > --- lisp/add-log.el~	2007-11-04 22:12:20.000000000 +0100
  > +++ lisp/add-log.el	2007-11-04 22:12:31.000000000 +0100
  > @@ -240,8 +240,10 @@
  >  ;; backward-compatibility alias
  >  (put 'change-log-acknowledgement-face 'face-alias 'change-log-acknowledgement)
  >  
  > +(defvar change-log-file-names-re "^\\( +\\|\t\\)\\* \\([^ ,:([\n]+\\)")
  > +
  >  (defvar change-log-font-lock-keywords
  > -  '(;;
  > +  `(;;
  >      ;; Date lines, new (2000-01-01) and old (Sat Jan  1 00:00:00 2000) styles.
  >      ;; Fixme: this regepx is just an approximate one and may match
  >      ;; wrongly with a non-date line existing as a random note.  In
  > @@ -255,7 +257,7 @@
  >        (2 'change-log-email)))
  >      ;;
  >      ;; File names.
  > -    ("^\\( +\\|\t\\)\\* \\([^ ,:([\n]+\\)"
  > +    (,change-log-file-names-re
  >       (2 'change-log-file)
  >       ;; Possibly further names in a list:
  >       ("\\=, \\([^ ,:([\n]+\\)" nil nil (1 'change-log-file))
  > @@ -287,10 +289,27 @@
  >       3 'change-log-acknowledgement))
  >    "Additional expressions to highlight in Change Log mode.")
  >  
  > +(defun change-log-search-file-name (where)
  > +  "Return the file-name for the change under point."
  > +  (save-excursion
  > +    (goto-char where)
  > +    (beginning-of-line 1)
  > +    (re-search-forward change-log-file-names-re)
  > +    (match-string 2)))
  > +
  > +(defun change-log-find-file ()
  > +  "Visit the file for the change under point."
  > +  (interactive)
  > +  (let ((file (change-log-search-file-name (point))))
  > +    (if (and file (file-exists-p file))
  > +	(find-file file)
  > +      (message "No such file or directory: ~s" file))))
  > +
  >  (defvar change-log-mode-map
  >    (let ((map (make-sparse-keymap)))
  >      (define-key map [?\C-c ?\C-p] 'add-log-edit-prev-comment)
  >      (define-key map [?\C-c ?\C-n] 'add-log-edit-next-comment)
  > +    (define-key map [?\C-c ?\C-f] 'change-log-find-file)
  >      map)
  >    "Keymap for Change Log major mode.")
  >  
  > 
  > 
  > -- 
  > Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond - The music typesetter
  > http://www.xs4all.nl/~jantien       | http://www.lilypond.org
  > 
  > 
  > 
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