;;; autoload.el --- maintain autoloads in loaddefs.el.
;;; Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
;;; Copyright (C) 1995 Tinker Systems and INS Engineering Corp.
;;; Copyright (C) 1996 Ben Wing.

;; Author: Roland McGrath <roland@gnu.ai.mit.edu>
;; Keywords: maint

;; This file is part of XEmacs.

;; XEmacs 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.

;; XEmacs 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 XEmacs; see the file COPYING.  If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.

;;; Synched up with: Not synched with FSF.

;;; Commentary:

;; This code helps GNU Emacs maintainers keep the loaddefs.el file up to
;; date.  It interprets magic cookies of the form ";;;###autoload" in
;; lisp source files in various useful ways.  To learn more, read the
;; source; if you're going to use this, you'd better be able to.

;;; Code:

(defun make-autoload (form file)
  "Turn FORM, a defun or defmacro, into an autoload for source file FILE.
Returns nil if FORM is not a defun, define-skeleton or defmacro."
  (let ((car (car-safe form)))
    (if (memq car '(defun define-skeleton defmacro))
	(let ((macrop (eq car 'defmacro))
	      name doc)
	  (setq form (cdr form)
		name (car form)
		;; Ignore the arguments.
		form (cdr (if (eq car 'define-skeleton)
			      form
			    (cdr form)))
		doc (car form))
	  (if (stringp doc)
	      (setq form (cdr form))
	    (setq doc nil))
	  (list 'autoload (list 'quote name) file doc
		(or (eq car 'define-skeleton)
		    (eq (car-safe (car form)) 'interactive))
		(if macrop (list 'quote 'macro) nil)))
      nil)))

(put 'define-skeleton 'doc-string-elt 3)

(defvar generate-autoload-cookie ";;;###autoload"
  "Magic comment indicating the following form should be autoloaded.
Used by `update-file-autoloads'.  This string should be
meaningless to Lisp (e.g., a comment).

This string is used:

;;;###autoload
\(defun function-to-be-autoloaded () ...)

If this string appears alone on a line, the following form will be
read and an autoload made for it.  If it is followed by the string
\"immediate\", then the form on the following line will be copied
verbatim.  If there is further text on the line, that text will be
copied verbatim to `generated-autoload-file'.")

(defvar generate-autoload-section-header "\f\n;;;### "
  "String inserted before the form identifying
the section of autoloads for a file.")

(defvar generate-autoload-section-trailer "\n;;;***\n"
  "String which indicates the end of the section of autoloads for a file.")

;;; Forms which have doc-strings which should be printed specially.
;;; A doc-string-elt property of ELT says that (nth ELT FORM) is
;;; the doc-string in FORM.
;;;
;;; There used to be the following note here:
;;; ;;; Note: defconst and defvar should NOT be marked in this way.
;;; ;;; We don't want to produce defconsts and defvars that
;;; ;;; make-docfile can grok, because then it would grok them twice,
;;; ;;; once in foo.el (where they are given with ;;;###autoload) and
;;; ;;; once in loaddefs.el.
;;;
;;; Counter-note: Yes, they should be marked in this way.
;;; make-docfile only processes those files that are loaded into the
;;; dumped Emacs, and those files should never have anything
;;; autoloaded here.  The above-feared problem only occurs with files
;;; which have autoloaded entries *and* are processed by make-docfile;
;;; there should be no such files.

(put 'autoload 'doc-string-elt 3)
(put 'defun    'doc-string-elt 3)
(put 'defvar   'doc-string-elt 3)
(put 'defconst 'doc-string-elt 3)
(put 'defmacro 'doc-string-elt 3)

(defun autoload-trim-file-name (file)
  "Returns a relative pathname of FILE including the last directory."
  (setq file (expand-file-name file))
  (file-relative-name file (file-name-directory
			    (directory-file-name
			     (file-name-directory file)))))

;;;###autoload
(defun generate-file-autoloads (file &optional funlist)
  "Insert at point a loaddefs autoload section for FILE.
autoloads are generated for defuns and defmacros in FILE
marked by `generate-autoload-cookie' (which see).
If FILE is being visited in a buffer, the contents of the buffer
are used."
  (interactive "fGenerate autoloads for file: ")
  (generate-file-autoloads-1 file funlist))

(defun* generate-file-autoloads-1 (file funlist)
  "Insert at point a loaddefs autoload section for FILE.
autoloads are generated for defuns and defmacros in FILE
marked by `generate-autoload-cookie' (which see).
If FILE is being visited in a buffer, the contents of the buffer
are used."
  (let ((outbuf (current-buffer))
	(autoloads-done '())
	(load-name (replace-in-string (file-name-nondirectory file)
				      "\\.elc?$"
				      ""))
	(trim-name (autoload-trim-file-name file))
	(dofiles (not (null funlist)))
	(print-length nil)
	(print-readably t) ; XEmacs
	(float-output-format nil)
	;; (done-any nil)
	(visited (get-file-buffer file))
	output-end)

    ;; If the autoload section we create here uses an absolute
    ;; pathname for FILE in its header, and then Emacs is installed
    ;; under a different path on another system,
    ;; `update-autoloads-here' won't be able to find the files to be
    ;; autoloaded.  So, if FILE is in the same directory or a
    ;; subdirectory of the current buffer's directory, we'll make it
    ;; relative to the current buffer's directory.
    (setq file (expand-file-name file))

    (save-excursion
      (unwind-protect
	  (progn
	    (let ((find-file-hooks nil)
		  (enable-local-variables nil))
	      (set-buffer (or visited (find-file-noselect file)))
	      (set-syntax-table lisp-mode-syntax-table))
	    (save-excursion
	      (save-restriction
		(widen)
		(goto-char (point-min))
		(unless (search-forward generate-autoload-cookie nil t)
		  (message "No autoloads found in %s" trim-name)
		  (return-from generate-file-autoloads-1))

		(message "Generating autoloads for %s..." trim-name)
		(goto-char (point-min))
		(while (if dofiles funlist (not (eobp)))
		  (if (not dofiles)
		      (skip-chars-forward " \t\n\f")
		    (goto-char (point-min))
		    (re-search-forward
		     (concat "(def\\(un\\|var\\|const\\|macro\\) "
			     (regexp-quote (symbol-name (car funlist)))
			     "\\s "))
		    (goto-char (match-beginning 0)))
		  (cond
		   ((or dofiles
			(looking-at (regexp-quote generate-autoload-cookie)))
		    (if dofiles
			nil
		      (search-forward generate-autoload-cookie)
		      (skip-chars-forward " \t"))
		    ;; (setq done-any t)
		    (if (or dofiles (eolp))
			;; Read the next form and make an autoload.
			(let* ((form (prog1 (read (current-buffer))
				       (or (bolp) (forward-line 1))))
			       (autoload (make-autoload form load-name))
			       (doc-string-elt (get (car-safe form)
						    'doc-string-elt)))
			  (if autoload
			      (setq autoloads-done (cons (nth 1 form)
							 autoloads-done))
			    (setq autoload form))
			  (if (and doc-string-elt
				   (stringp (nth doc-string-elt autoload)))
			      ;; We need to hack the printing because the
			      ;; doc-string must be printed specially for
			      ;; make-docfile (sigh).
			      (let* ((p (nthcdr (1- doc-string-elt)
						autoload))
				     (elt (cdr p)))
				(setcdr p nil)
				(princ "\n(" outbuf)
				;; XEmacs change: don't let ^^L's get into
				;; the file or sorting is hard.
				(let ((print-escape-newlines t)
				      (p (save-excursion
					   (set-buffer outbuf)
					   (point)))
				      p2)
				  (mapcar (function (lambda (elt)
						      (prin1 elt outbuf)
						      (princ " " outbuf)))
					  autoload)
				  (save-excursion
				    (set-buffer outbuf)
				    (setq p2 (point-marker))
				    (goto-char p)
				    (save-match-data
				      (while (search-forward "\^L" p2 t)
					(delete-char -1)
					(insert "\\^L")))
				    (goto-char p2)
				    ))
				(princ "\"\\\n" outbuf)
				(let ((begin (save-excursion
					       (set-buffer outbuf)
					       (point))))
				  (princ (substring
					  (prin1-to-string (car elt)) 1)
					 outbuf)
				  ;; Insert a backslash before each ( that
				  ;; appears at the beginning of a line in
				  ;; the doc string.
				  (save-excursion
				    (set-buffer outbuf)
				    (save-excursion
				      (while (search-backward "\n(" begin t)
					(forward-char 1)
					(insert "\\"))))
				  (if (null (cdr elt))
				      (princ ")" outbuf)
				    (princ " " outbuf)
				    (princ (substring
					    (prin1-to-string (cdr elt))
					    1)
					   outbuf))
				  (terpri outbuf)))
			    ;; XEmacs change: another fucking ^L hack
			    (let ((p (save-excursion
				       (set-buffer outbuf)
				       (point)))
				  (print-escape-newlines t)
				  p2)
			      (print autoload outbuf)
			      (save-excursion
				(set-buffer outbuf)
				(setq p2 (point-marker))
				(goto-char p)
				(save-match-data
				  (while (search-forward "\^L" p2 t)
				    (delete-char -1)
				    (insert "\\^L")))
				(goto-char p2)
				))
			    ))
		      ;; Copy the rest of the line to the output.
		      (let ((begin (point)))
			(terpri outbuf)
			(cond ((looking-at "immediate\\s *$") ; XEmacs
			       ;; This is here so that you can automatically
			       ;; have small hook functions copied to
			       ;; loaddefs.el so that it's not necessary to
			       ;; load a whole file just to get a two-line
			       ;; do-nothing find-file-hook... --Stig
			       (forward-line 1)
			       (setq begin (point))
			       (forward-sexp)
			       (forward-line 1))
			      (t
			       (forward-line 1)))
			(princ (buffer-substring begin (point)) outbuf))))
		   ((looking-at ";")
		    ;; Don't read the comment.
		    (forward-line 1))
		   (t
		    (forward-sexp 1)
		    (forward-line 1)))
		  (if dofiles
		      (setq funlist (cdr funlist)))))))
	;;(unless visited
	    ;; We created this buffer, so we should kill it.
	    ;; Customize needs it later, we don't want to read the file
	    ;; in twice.
	    ;;(kill-buffer (current-buffer)))
	(set-buffer outbuf)
	(setq output-end (point-marker))))
    (if t ;; done-any
	;; XEmacs -- always do this so that we cache the information
	;; that we've processed the file already.
	(progn
	  (insert generate-autoload-section-header)
	  (prin1 (list 'autoloads autoloads-done load-name trim-name)
		 outbuf)
	  (terpri outbuf)
	  ;;;; (insert ";;; Generated autoloads from "
	  ;;;;	  (autoload-trim-file-name file) "\n")
	  ;; Warn if we put a line in loaddefs.el
	  ;; that is long enough to cause trouble.
	  (when (< output-end (point))
	    (setq output-end (point-marker)))
	  (while (< (point) output-end)
	    (let ((beg (point)))
	      (end-of-line)
	      (if (> (- (point) beg) 900)
		  (progn
		    (message "A line is too long--over 900 characters")
		    (sleep-for 2)
		    (goto-char output-end))))
	    (forward-line 1))
	  (goto-char output-end)
	  (insert generate-autoload-section-trailer)))
    (or noninteractive ; XEmacs: only need one line in -batch mode.
	(message "Generating autoloads for %s...done" file))))


(defvar generated-autoload-file
  (expand-file-name "../lisp/prim/auto-autoloads.el" data-directory)
  "*File `update-file-autoloads' puts autoloads into.
A .el file can set this in its local variables section to make its
autoloads go somewhere else.")

(defvar generated-custom-file
  (expand-file-name "../lisp/prim/custom-load.el" data-directory)
  "*File `update-file-autoloads' puts customization into.")

;; Written by Per Abrahamsen
(defun autoload-snarf-defcustom (file)
  "Snarf all customizations in the current buffer."
  (let ((visited (get-file-buffer file)))
    (save-excursion
      (set-buffer (or visited (find-file-noselect file)))
      (when (and file
		 (string-match "\\`\\(.*\\)\\.el\\'" file)
		 (not (buffer-modified-p)))
	(goto-char (point-min))
	(condition-case nil
	    (let ((name (file-name-nondirectory (match-string 1 file))))
	      (while t
		(let ((expr (read (current-buffer))))
		  (when (and (listp expr)
			     (memq (car expr) '(defcustom defface defgroup)))
		    (eval expr)
		    (put (nth 1 expr) 'custom-where name)))))
	  (error nil)))
      (unless (buffer-modified-p)
	(kill-buffer (current-buffer))))))

;;;###autoload
(defun update-file-autoloads (file)
  "Update the autoloads for FILE in `generated-autoload-file'
\(which FILE might bind in its local variables)."
  (interactive "fUpdate autoloads for file: ")
  (setq file (expand-file-name file))
  (let ((load-name (replace-in-string (file-name-nondirectory file)
				      "\\.elc?$"
				      ""))
	(trim-name (autoload-trim-file-name file))
	section-begin form)
    (save-excursion
      (let ((find-file-hooks nil))
	(set-buffer (or (get-file-buffer generated-autoload-file)
			(find-file-noselect generated-autoload-file))))
      ;; First delete all sections for this file.
      (goto-char (point-min))
      (while (search-forward generate-autoload-section-header nil t)
	(setq section-begin (match-beginning 0))
	(setq form (read (current-buffer)))
	(when (string= (nth 2 form) load-name)
	  (search-forward generate-autoload-section-trailer)
	  (delete-region section-begin (point))))

      ;; Now find insertion point for new section
      (block find-insertion-point
	(goto-char (point-min))
	(while (search-forward generate-autoload-section-header nil t)
	  (setq form (read (current-buffer)))
	  (when (string< trim-name (nth 3 form))
	    ;; Found alphabetically correct insertion point
	    (goto-char (match-beginning 0))
	    (return-from find-insertion-point))
	  (search-forward generate-autoload-section-trailer))
	(when (eq (point) (point-min))	; No existing entries?
	  (goto-char (point-max))))	; Append.

      ;; Add in new sections for file
      (generate-file-autoloads file)
      (autoload-snarf-defcustom file))

    (when (interactive-p) (save-buffer))))

;;;###autoload
(defun update-autoloads-here ()
  "Update sections of the current buffer generated by `update-file-autoloads'."
  (interactive)
  (let ((generated-autoload-file (buffer-file-name)))
    (save-excursion
      (goto-char (point-min))
      (while (search-forward generate-autoload-section-header nil t)
	(let* ((form (condition-case ()
			 (read (current-buffer))
		       (end-of-file nil)))
	       (file (nth 3 form)))
	  ;; XEmacs change: if we can't find the file as specified, look
	  ;; around a bit more.
	  (cond ((and (stringp file)
		      (or (get-file-buffer file)
			  (file-exists-p file))))
		((and (stringp file)
		      (save-match-data
			(let ((loc (locate-file (file-name-nondirectory file)
						load-path)))
			  (if (null loc)
			      nil
			    (setq loc (expand-file-name
				       (autoload-trim-file-name loc)
				       ".."))
			    (if (or (get-file-buffer loc)
				    (file-exists-p loc))
				(setq file loc)
			      nil))))))
		(t
		 (setq file
		       (if (y-or-n-p
			    (format
			     "Can't find library `%s'; remove its autoloads? "
			     (nth 2 form) file))
			   t
			 (condition-case ()
			     (read-file-name
			      (format "Find `%s' load file: "
				      (nth 2 form))
			      nil nil t)
			   (quit nil))))))
	  (if file
	      (let ((begin (match-beginning 0)))
		(search-forward generate-autoload-section-trailer)
		(delete-region begin (point))))
	  (if (stringp file)
	      (generate-file-autoloads file)))))))

;;;###autoload
(defun update-autoloads-from-directory (dir)
  "Update `generated-autoload-file' with all the current autoloads from DIR.
This runs `update-file-autoloads' on each .el file in DIR.
Obsolete autoload entries for files that no longer exist are deleted."
  (interactive "DUpdate autoloads for directory: ")
  (setq dir (expand-file-name dir))
  (let ((simple-dir (file-name-as-directory
		     (file-name-nondirectory
		     (directory-file-name dir))))
	(enable-local-eval nil))
    (save-excursion
      (let ((find-file-hooks nil))
	(set-buffer (find-file-noselect generated-autoload-file)))
      (goto-char (point-min))
      (while (search-forward generate-autoload-section-header nil t)
	(let* ((begin (match-beginning 0))
	       (form (condition-case ()
			 (read (current-buffer))
		       (end-of-file nil)))
	       (file (nth 3 form)))
	  (when (and (stringp file)
		     (string= (file-name-directory file) simple-dir)
		     (not (file-exists-p
			   (expand-file-name
			    (file-name-nondirectory file) dir))))
	    ;; Remove the obsolete section.
	    (search-forward generate-autoload-section-trailer)
	    (delete-region begin (point)))))
      ;; Update or create autoload sections for existing files.
      (mapcar 'update-file-autoloads (directory-files dir t "^[^=].*\\.el$"))
      (unless noninteractive
	(save-buffer)))))

;; Based on code from Per Abrahamsen
(defun autoload-save-customization ()
  (save-excursion
    (set-buffer (find-file-noselect generated-custom-file))
    (erase-buffer)
    (insert
     (with-output-to-string
      (mapatoms (lambda (symbol)
		  (let ((members (get symbol 'custom-group))
			item where found)
		    (when members
		      (princ "(put '")
		      (princ symbol)
		      (princ " 'custom-loads '(")
		      (while members
			(setq item (car (car members))
			      members (cdr members)
			      where (get item 'custom-where))
			(unless (or (null where)
				    (member where found))
			  (when found
			    (princ " "))
			  (prin1 where)
			  (push where found)))
		      (princ "))\n")))))))))

;;;###autoload
(defun batch-update-autoloads ()
  "Update the autoloads for the files or directories on the command line.
Runs `update-file-autoloads' on files and `update-directory-autoloads'
on directories.  Must be used only with -batch, and kills Emacs on completion.
Each file will be processed even if an error occurred previously.
For example, invoke `xemacs -batch -f batch-update-autoloads *.el'."
  (unless noninteractive
    (error "batch-update-autoloads is to be used only with -batch"))
  (let ((defdir default-directory)
	(enable-local-eval nil))	; Don't query in batch mode.
    (message "Updating autoloads in %s..." generated-autoload-file)
    (dolist (arg command-line-args-left)
      (setq arg (expand-file-name arg defdir))
      (cond
       ((file-directory-p arg)
	(message "Updating autoloads for directory %s..." arg)
	(update-autoloads-from-directory arg))
       ((file-exists-p arg)
	(update-file-autoloads arg))
       (t (error "No such file or directory: %s" arg))))
    (autoload-save-customization)
    (save-some-buffers t)
    (message "Done")
    (kill-emacs 0)))

(provide 'autoload)

;;; autoload.el ends here