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emacs/lisp/add-log.el
Richard M. Stallman de98fcafe2 (find-change-log): If change-log-default-name 
has no dir component, search through parent dirs for it.
1994-11-10 22:03:43 +00:00

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;;; add-log.el --- change log maintenance commands for Emacs
;; Copyright (C) 1985, 1986, 1988, 1993, 1994 Free Software Foundation, Inc.
;; Keywords: maint
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
;;; Commentary:
;; This facility is documented in the Emacs Manual.
;;; Code:
(defvar change-log-default-name nil
"*Name of a change log file for \\[add-change-log-entry].")
(defvar add-log-current-defun-function nil
"\
*If non-nil, function to guess name of current function from surrounding text.
\\[add-change-log-entry] calls this function (if nil, `add-log-current-defun'
instead) with no arguments. It returns a string or nil if it cannot guess.")
(defvar add-log-full-name nil
"*Full name of user, for inclusion in ChangeLog daily headers.
This defaults to the value returned by the `user-full-name' function.")
(defvar add-log-mailing-address nil
"*Electronic mail address of user, for inclusion in ChangeLog daily headers.
This defaults to the value of `user-mail-address'.")
(defvar change-log-font-lock-keywords
'(("^[SMTWF].+$" . font-lock-function-name-face) ; Date line.
("^\t\\* \\([^ :\n]+\\)" 1 font-lock-comment-face) ; File name.
("\(\\([^)\n]+\\)\)" 1 font-lock-keyword-face)) ; Function name.
"Additional expressions to highlight in Change Log mode.")
(defvar change-log-mode-map nil
"Keymap for Change Log major mode.")
(if change-log-mode-map
nil
(setq change-log-mode-map (make-sparse-keymap))
(define-key change-log-mode-map "\M-q" 'change-log-fill-paragraph))
(defun change-log-name ()
(or change-log-default-name
(if (eq system-type 'vax-vms)
"$CHANGE_LOG$.TXT"
(if (or (eq system-type 'ms-dos) (eq system-type 'windows-nt))
"changelo"
"ChangeLog"))))
;;;###autoload
(defun prompt-for-change-log-name ()
"Prompt for a change log name."
(let ((default (change-log-name)))
(expand-file-name
(read-file-name (format "Log file (default %s): " default)
nil default))))
;;;###autoload
(defun find-change-log (&optional file-name)
"Find a change log file for \\[add-change-log-entry] and return the name.
Optional arg FILE-NAME specifies the file to use.
If FILE-NAME is nil, use the value of `change-log-default-name'.
If 'change-log-default-name' is nil, behave as though it were 'ChangeLog'
\(or whatever we use on this operating system).
If 'change-log-default-name' contains a leading directory component, then
simply find it in the current directory. Otherwise, search in the current
directory and its successive parents for a file so named.
Once a file is found, `change-log-default-name' is set locally in the
current buffer to the complete file name."
;; If user specified a file name or if this buffer knows which one to use,
;; just use that.
(or file-name
(setq file-name (and change-log-default-name
(file-name-directory change-log-default-name)
change-log-default-name))
(progn
;; Chase links in the source file
;; and use the change log in the dir where it points.
(setq file-name (or (and buffer-file-name
(file-name-directory
(file-chase-links buffer-file-name)))
default-directory))
(if (file-directory-p file-name)
(setq file-name (expand-file-name (change-log-name) file-name)))
;; Chase links before visiting the file.
;; This makes it easier to use a single change log file
;; for several related directories.
(setq file-name (file-chase-links file-name))
(setq file-name (expand-file-name file-name))
;; Move up in the dir hierarchy till we find a change log file.
(let ((file1 file-name)
parent-dir)
(while (and (not (or (get-file-buffer file1) (file-exists-p file1)))
(progn (setq parent-dir
(file-name-directory
(directory-file-name
(file-name-directory file1))))
;; Give up if we are already at the root dir.
(not (string= (file-name-directory file1)
parent-dir))))
;; Move up to the parent dir and try again.
(setq file1 (expand-file-name
(file-name-nondirectory (change-log-name))
parent-dir)))
;; If we found a change log in a parent, use that.
(if (or (get-file-buffer file1) (file-exists-p file1))
(setq file-name file1)))))
;; Make a local variable in this buffer so we needn't search again.
(set (make-local-variable 'change-log-default-name) file-name)
file-name)
;;;###autoload
(defun add-change-log-entry (&optional whoami file-name other-window new-entry)
"Find change log file and add an entry for today.
Optional arg (interactive prefix) non-nil means prompt for user name and site.
Second arg is file name of change log. If nil, uses `change-log-default-name'.
Third arg OTHER-WINDOW non-nil means visit in other window.
Fourth arg NEW-ENTRY non-nil means always create a new entry at the front;
never append to an existing entry."
(interactive (list current-prefix-arg
(prompt-for-change-log-name)))
(if whoami
(progn
(setq add-log-full-name (read-input "Full name: " add-log-full-name))
;; Note that some sites have room and phone number fields in
;; full name which look silly when inserted. Rather than do
;; anything about that here, let user give prefix argument so that
;; s/he can edit the full name field in prompter if s/he wants.
(setq add-log-mailing-address
(read-input "Mailing address: " add-log-mailing-address))))
(or add-log-full-name
(setq add-log-full-name (user-full-name)))
(or add-log-mailing-address
(setq add-log-mailing-address user-mail-address))
(let ((defun (funcall (or add-log-current-defun-function
'add-log-current-defun)))
paragraph-end entry)
(setq file-name (expand-file-name (find-change-log file-name)))
;; Set ENTRY to the file name to use in the new entry.
(and buffer-file-name
;; Never want to add a change log entry for the ChangeLog file itself.
(not (string= buffer-file-name file-name))
(setq entry (if (string-match
(concat "^" (regexp-quote (file-name-directory
file-name)))
buffer-file-name)
(substring buffer-file-name (match-end 0))
(file-name-nondirectory buffer-file-name))))
(if (and other-window (not (equal file-name buffer-file-name)))
(find-file-other-window file-name)
(find-file file-name))
(or (eq major-mode 'change-log-mode)
(change-log-mode))
(undo-boundary)
(goto-char (point-min))
(if (looking-at (concat (regexp-quote (substring (current-time-string)
0 10))
".* " (regexp-quote add-log-full-name)
" <" (regexp-quote add-log-mailing-address)))
(forward-line 1)
(insert (current-time-string)
" " add-log-full-name
" <" add-log-mailing-address ">\n\n"))
;; Search only within the first paragraph.
(if (looking-at "\n*[^\n* \t]")
(skip-chars-forward "\n")
(forward-paragraph 1))
(setq paragraph-end (point))
(goto-char (point-min))
;; Now insert the new line for this entry.
(cond ((re-search-forward "^\\s *\\*\\s *$" paragraph-end t)
;; Put this file name into the existing empty entry.
(if entry
(insert entry)))
((and (not new-entry)
(re-search-forward
(concat (regexp-quote (concat "* " entry))
;; Don't accept `foo.bar' when
;; looking for `foo':
"\\(\\s \\|[(),:]\\)")
paragraph-end t))
;; Add to the existing entry for the same file.
(re-search-forward "^\\s *$\\|^\\s \\*")
(beginning-of-line)
(while (and (not (eobp)) (looking-at "^\\s *$"))
(delete-region (point) (save-excursion (forward-line 1) (point))))
(insert "\n\n")
(forward-line -2)
(indent-relative-maybe))
(t
;; Make a new entry.
(forward-line 1)
(while (looking-at "\\sW")
(forward-line 1))
(while (and (not (eobp)) (looking-at "^\\s *$"))
(delete-region (point) (save-excursion (forward-line 1) (point))))
(insert "\n\n\n")
(forward-line -2)
(indent-to left-margin)
(insert "* " (or entry ""))))
;; Now insert the function name, if we have one.
;; Point is at the entry for this file,
;; either at the end of the line or at the first blank line.
(if defun
(progn
;; Make it easy to get rid of the function name.
(undo-boundary)
(insert (if (save-excursion
(beginning-of-line 1)
(looking-at "\\s *$"))
""
" ")
"(" defun "): "))
;; No function name, so put in a colon unless we have just a star.
(if (not (save-excursion
(beginning-of-line 1)
(looking-at "\\s *\\(\\*\\s *\\)?$")))
(insert ": ")))))
;;;###autoload
(defun add-change-log-entry-other-window (&optional whoami file-name)
"Find change log file in other window and add an entry for today.
Optional arg (interactive prefix) non-nil means prompt for user name and site.
Second arg is file name of change log. \
If nil, uses `change-log-default-name'."
(interactive (if current-prefix-arg
(list current-prefix-arg
(prompt-for-change-log-name))))
(add-change-log-entry whoami file-name t))
;;;###autoload (define-key ctl-x-4-map "a" 'add-change-log-entry-other-window)
;;;###autoload
(defun change-log-mode ()
"Major mode for editing change logs; like Indented Text Mode.
Prevents numeric backups and sets `left-margin' to 8 and `fill-column' to 74.
New log entries are usually made with \\[add-change-log-entry] or \\[add-change-log-entry-other-window].
Each entry behaves as a paragraph, and the entries for one day as a page.
Runs `change-log-mode-hook'."
(interactive)
(kill-all-local-variables)
(indented-text-mode)
(setq major-mode 'change-log-mode
mode-name "Change Log"
left-margin 8
fill-column 74)
(use-local-map change-log-mode-map)
;; Let each entry behave as one paragraph:
(set (make-local-variable 'paragraph-start) "^\\s *$\\|^\f")
(set (make-local-variable 'paragraph-separate) "^\\s *$\\|^\f\\|^\\sw")
;; Let all entries for one day behave as one page.
;; Match null string on the date-line so that the date-line
;; is grouped with what follows.
(set (make-local-variable 'page-delimiter) "^\\<\\|^\f")
(set (make-local-variable 'version-control) 'never)
(set (make-local-variable 'adaptive-fill-regexp) "\\s *")
(set (make-local-variable 'font-lock-defaults)
'(change-log-font-lock-keywords t))
(run-hooks 'change-log-mode-hook))
;; It might be nice to have a general feature to replace this. The idea I
;; have is a variable giving a regexp matching text which should not be
;; moved from bol by filling. change-log-mode would set this to "^\\s *\\s(".
;; But I don't feel up to implementing that today.
(defun change-log-fill-paragraph (&optional justify)
"Fill the paragraph, but preserve open parentheses at beginning of lines.
Prefix arg means justify as well."
(interactive "P")
(let ((paragraph-separate (concat paragraph-separate "\\|^\\s *\\s("))
(paragraph-start (concat paragraph-start "\\|^\\s *\\s(")))
(fill-paragraph justify)))
(defvar add-log-current-defun-header-regexp
"^\\([A-Z][A-Z_ ]*[A-Z_]\\|[-_a-zA-Z]+\\)[ \t]*[:=]"
"*Heuristic regexp used by `add-log-current-defun' for unknown major modes.")
;;;###autoload
(defun add-log-current-defun ()
"Return name of function definition point is in, or nil.
Understands C, Lisp, LaTeX (\"functions\" are chapters, sections, ...),
Texinfo (@node titles), Perl, and Fortran.
Other modes are handled by a heuristic that looks in the 10K before
point for uppercase headings starting in the first column or
identifiers followed by `:' or `=', see variable
`add-log-current-defun-header-regexp'.
Has a preference of looking backwards."
(condition-case nil
(save-excursion
(let ((location (point)))
(cond ((memq major-mode '(emacs-lisp-mode lisp-mode scheme-mode
lisp-interaction-mode))
;; If we are now precisely a the beginning of a defun,
;; make sure beginning-of-defun finds that one
;; rather than the previous one.
(or (eobp) (forward-char 1))
(beginning-of-defun)
;; Make sure we are really inside the defun found, not after it.
(if (and (progn (end-of-defun)
(< location (point)))
(progn (forward-sexp -1)
(>= location (point))))
(progn
(if (looking-at "\\s(")
(forward-char 1))
(forward-sexp 1)
(skip-chars-forward " ")
(buffer-substring (point)
(progn (forward-sexp 1) (point))))))
((and (memq major-mode '(c-mode c++-mode c++-c-mode))
(save-excursion (beginning-of-line)
;; Use eq instead of = here to avoid
;; error when at bob and char-after
;; returns nil.
(while (eq (char-after (- (point) 2)) ?\\)
(forward-line -1))
(looking-at "[ \t]*#[ \t]*define[ \t]")))
;; Handle a C macro definition.
(beginning-of-line)
(while (eq (char-after (- (point) 2)) ?\\) ;not =; note above
(forward-line -1))
(search-forward "define")
(skip-chars-forward " \t")
(buffer-substring (point)
(progn (forward-sexp 1) (point))))
((memq major-mode '(c-mode c++-mode c++-c-mode))
(beginning-of-line)
;; See if we are in the beginning part of a function,
;; before the open brace. If so, advance forward.
(while (not (looking-at "{\\|\\(\\s *$\\)"))
(forward-line 1))
(or (eobp)
(forward-char 1))
(beginning-of-defun)
(if (progn (end-of-defun)
(< location (point)))
(progn
(backward-sexp 1)
(let (beg tem)
(forward-line -1)
;; Skip back over typedefs of arglist.
(while (and (not (bobp))
(looking-at "[ \t\n]"))
(forward-line -1))
;; See if this is using the DEFUN macro used in Emacs,
;; or the DEFUN macro used by the C library.
(if (condition-case nil
(and (save-excursion
(end-of-line)
(while (= (preceding-char) ?\\)
(end-of-line 2))
(backward-sexp 1)
(beginning-of-line)
(setq tem (point))
(looking-at "DEFUN\\b"))
(>= location tem))
(error nil))
(progn
(goto-char tem)
(down-list 1)
(if (= (char-after (point)) ?\")
(progn
(forward-sexp 1)
(skip-chars-forward " ,")))
(buffer-substring (point)
(progn (forward-sexp 1) (point))))
;; Ordinary C function syntax.
(setq beg (point))
(if (condition-case nil
;; Protect against "Unbalanced parens" error.
(progn
(down-list 1) ; into arglist
(backward-up-list 1)
(skip-chars-backward " \t")
t)
(error nil))
;; Verify initial pos was after
;; real start of function.
(if (and (save-excursion
(goto-char beg)
;; For this purpose, include the line
;; that has the decl keywords. This
;; may also include some of the
;; comments before the function.
(while (and (not (bobp))
(save-excursion
(forward-line -1)
(looking-at "[^\n\f]")))
(forward-line -1))
(>= location (point)))
;; Consistency check: going down and up
;; shouldn't take us back before BEG.
(> (point) beg))
(buffer-substring (point)
(progn (backward-sexp 1)
(point))))))))))
((memq major-mode
'(TeX-mode plain-TeX-mode LaTeX-mode;; tex-mode.el
plain-tex-mode latex-mode;; cmutex.el
))
(if (re-search-backward
"\\\\\\(sub\\)*\\(section\\|paragraph\\|chapter\\)" nil t)
(progn
(goto-char (match-beginning 0))
(buffer-substring (1+ (point));; without initial backslash
(progn
(end-of-line)
(point))))))
((eq major-mode 'texinfo-mode)
(if (re-search-backward "^@node[ \t]+\\([^,\n]+\\)" nil t)
(buffer-substring (match-beginning 1)
(match-end 1))))
((eq major-mode 'perl-mode)
(if (re-search-backward "^sub[ \t]+\\([^ \t\n]+\\)" nil t)
(buffer-substring (match-beginning 1)
(match-end 1))))
((eq major-mode 'fortran-mode)
;; must be inside function body for this to work
(beginning-of-fortran-subprogram)
(let ((case-fold-search t)) ; case-insensitive
;; search for fortran subprogram start
(if (re-search-forward
"^[ \t]*\\(program\\|subroutine\\|function\
\\|[ \ta-z0-9*]*[ \t]+function\\)"
nil t)
(progn
;; move to EOL or before first left paren
(if (re-search-forward "[(\n]" nil t)
(progn (forward-char -1)
(skip-chars-backward " \t"))
(end-of-line))
;; Use the name preceding that.
(buffer-substring (point)
(progn (forward-sexp -1)
(point)))))))
(t
;; If all else fails, try heuristics
(let (case-fold-search)
(end-of-line)
(if (re-search-backward add-log-current-defun-header-regexp
(- (point) 10000)
t)
(buffer-substring (match-beginning 1)
(match-end 1))))))))
(error nil)))
(provide 'add-log)
;;; add-log.el ends here
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