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417 lines
14 KiB
EmacsLisp
417 lines
14 KiB
EmacsLisp
;;; autoload.el --- maintain autoloads in loaddefs.el.
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;; Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
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;; Author: Roland McGrath <roland@gnu.ai.mit.edu>
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;; Keywords: maint
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; This code helps GNU Emacs maintainers keep the loaddefs.el file up to
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;; date. It interprets magic cookies of the form ";;;###autoload" in
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;; lisp source files in various useful ways. To learn more, read the
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;; source; if you're going to use this, you'd better be able to.
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;;; Code:
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(defun make-autoload (form file)
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"Turn FORM, a defun or defmacro, into an autoload for source file FILE.
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Returns nil if FORM is not a defun, define-skeleton or defmacro."
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(let ((car (car-safe form)))
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(if (memq car '(defun define-skeleton defmacro))
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(let ((macrop (eq car 'defmacro))
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name doc)
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(setq form (cdr form)
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name (car form)
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;; Ignore the arguments.
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form (cdr (if (eq car 'define-skeleton)
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form
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(cdr form)))
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doc (car form))
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(if (stringp doc)
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(setq form (cdr form))
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(setq doc nil))
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(list 'autoload (list 'quote name) file doc
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(or (eq car 'define-skeleton)
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(eq (car-safe (car form)) 'interactive))
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(if macrop (list 'quote 'macro) nil)))
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nil)))
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(put 'define-skeleton 'doc-string-elt 3)
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(defconst generate-autoload-cookie ";;;###autoload"
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"Magic comment indicating the following form should be autoloaded.
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Used by \\[update-file-autoloads]. This string should be
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meaningless to Lisp (e.g., a comment).
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This string is used:
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;;;###autoload
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\(defun function-to-be-autoloaded () ...)
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If this string appears alone on a line, the following form will be
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read and an autoload made for it. If there is further text on the line,
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that text will be copied verbatim to `generated-autoload-file'.")
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(defconst generate-autoload-section-header "\f\n;;;### "
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"String inserted before the form identifying
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the section of autoloads for a file.")
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(defconst generate-autoload-section-trailer "\n;;;***\n"
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"String which indicates the end of the section of autoloads for a file.")
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;;; Forms which have doc-strings which should be printed specially.
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;;; A doc-string-elt property of ELT says that (nth ELT FORM) is
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;;; the doc-string in FORM.
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;;;
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;;; There used to be the following note here:
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;;; ;;; Note: defconst and defvar should NOT be marked in this way.
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;;; ;;; We don't want to produce defconsts and defvars that
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;;; ;;; make-docfile can grok, because then it would grok them twice,
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;;; ;;; once in foo.el (where they are given with ;;;###autoload) and
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;;; ;;; once in loaddefs.el.
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;;;
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;;; Counter-note: Yes, they should be marked in this way.
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;;; make-docfile only processes those files that are loaded into the
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;;; dumped Emacs, and those files should never have anything
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;;; autoloaded here. The above-feared problem only occurs with files
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;;; which have autoloaded entries *and* are processed by make-docfile;
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;;; there should be no such files.
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(put 'autoload 'doc-string-elt 3)
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(put 'defun 'doc-string-elt 3)
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(put 'defvar 'doc-string-elt 3)
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(put 'defconst 'doc-string-elt 3)
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(put 'defmacro 'doc-string-elt 3)
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(defun autoload-trim-file-name (file)
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;; Returns a relative pathname of FILE
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;; starting from the directory that loaddefs.el is in.
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;; That is normally a directory in load-path,
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;; which means Emacs will be able to find FILE when it looks.
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;; Any extra directory names here would prevent finding the file.
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(setq file (expand-file-name file))
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(file-relative-name file
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(file-name-directory generated-autoload-file)))
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(defun generate-file-autoloads (file)
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"Insert at point a loaddefs autoload section for FILE.
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autoloads are generated for defuns and defmacros in FILE
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marked by `generate-autoload-cookie' (which see).
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If FILE is being visited in a buffer, the contents of the buffer
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are used."
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(interactive "fGenerate autoloads for file: ")
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(let ((outbuf (current-buffer))
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(autoloads-done '())
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(load-name (let ((name (file-name-nondirectory file)))
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(if (string-match "\\.elc?$" name)
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(substring name 0 (match-beginning 0))
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name)))
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(print-length nil)
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(print-readably t) ; This does something in Lucid Emacs.
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(float-output-format nil)
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(done-any nil)
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(visited (get-file-buffer file))
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output-end)
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;; If the autoload section we create here uses an absolute
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;; pathname for FILE in its header, and then Emacs is installed
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;; under a different path on another system,
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;; `update-autoloads-here' won't be able to find the files to be
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;; autoloaded. So, if FILE is in the same directory or a
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;; subdirectory of the current buffer's directory, we'll make it
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;; relative to the current buffer's directory.
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(setq file (expand-file-name file))
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(let* ((source-truename (file-truename file))
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(dir-truename (file-name-as-directory
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(file-truename default-directory)))
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(len (length dir-truename)))
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(if (and (< len (length source-truename))
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(string= dir-truename (substring source-truename 0 len)))
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(setq file (substring source-truename len))))
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(message "Generating autoloads for %s..." file)
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(save-excursion
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(unwind-protect
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(progn
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(if visited
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(set-buffer visited)
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;; It is faster to avoid visiting the file.
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(set-buffer (get-buffer-create " *generate-autoload-file*"))
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(kill-all-local-variables)
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(erase-buffer)
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(setq buffer-undo-list t
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buffer-read-only nil)
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(emacs-lisp-mode)
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(insert-file-contents file nil))
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(save-excursion
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(save-restriction
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(widen)
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(goto-char (point-min))
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(while (not (eobp))
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(skip-chars-forward " \t\n\f")
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(cond
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((looking-at (regexp-quote generate-autoload-cookie))
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(search-forward generate-autoload-cookie)
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(skip-chars-forward " \t")
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(setq done-any t)
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(if (eolp)
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;; Read the next form and make an autoload.
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(let* ((form (prog1 (read (current-buffer))
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(or (bolp) (forward-line 1))))
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(autoload (make-autoload form load-name))
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(doc-string-elt (get (car-safe form)
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'doc-string-elt)))
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(if autoload
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(setq autoloads-done (cons (nth 1 form)
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autoloads-done))
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(setq autoload form))
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(if (and doc-string-elt
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(stringp (nth doc-string-elt autoload)))
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;; We need to hack the printing because the
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;; doc-string must be printed specially for
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;; make-docfile (sigh).
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(let* ((p (nthcdr (1- doc-string-elt)
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autoload))
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(elt (cdr p)))
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(setcdr p nil)
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(princ "\n(" outbuf)
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(let ((print-escape-newlines t))
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(mapcar (function (lambda (elt)
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(prin1 elt outbuf)
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(princ " " outbuf)))
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autoload))
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(princ "\"\\\n" outbuf)
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(let ((begin (save-excursion
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(set-buffer outbuf)
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(point))))
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(princ (substring
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(prin1-to-string (car elt)) 1)
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outbuf)
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;; Insert a backslash before each ( that
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;; appears at the beginning of a line in
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;; the doc string.
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(save-excursion
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(set-buffer outbuf)
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(save-excursion
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(while (search-backward "\n(" begin t)
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(forward-char 1)
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(insert "\\"))))
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(if (null (cdr elt))
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(princ ")" outbuf)
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(princ " " outbuf)
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(princ (substring
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(prin1-to-string (cdr elt))
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1)
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outbuf))
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(terpri outbuf)))
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(let ((print-escape-newlines t))
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(print autoload outbuf))))
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;; Copy the rest of the line to the output.
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(princ (buffer-substring
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(progn
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;; Back up over whitespace, to preserve it.
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(skip-chars-backward " \f\t")
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(if (= (char-after (1+ (point))) ? )
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;; Eat one space.
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(forward-char 1))
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(point))
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(progn (forward-line 1) (point)))
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outbuf)))
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((looking-at ";")
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;; Don't read the comment.
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(forward-line 1))
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(t
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(forward-sexp 1)
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(forward-line 1)))))))
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(or visited
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;; We created this buffer, so we should kill it.
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(kill-buffer (current-buffer)))
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(set-buffer outbuf)
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(setq output-end (point-marker))))
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(if done-any
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(progn
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(insert generate-autoload-section-header)
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(prin1 (list 'autoloads autoloads-done load-name
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(autoload-trim-file-name file)
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(nth 5 (file-attributes file)))
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outbuf)
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(terpri outbuf)
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(insert ";;; Generated autoloads from "
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(autoload-trim-file-name file) "\n")
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;; Warn if we put a line in loaddefs.el
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;; that is long enough to cause trouble.
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(while (< (point) output-end)
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(let ((beg (point)))
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(end-of-line)
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(if (> (- (point) beg) 900)
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(progn
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(message "A line is too long--over 900 characters")
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(sleep-for 2)
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(goto-char output-end))))
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(forward-line 1))
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(goto-char output-end)
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(insert generate-autoload-section-trailer)))
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(message "Generating autoloads for %s...done" file)))
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(defconst generated-autoload-file "loaddefs.el"
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"*File \\[update-file-autoloads] puts autoloads into.
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A .el file can set this in its local variables section to make its
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autoloads go somewhere else.")
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;;;###autoload
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(defun update-file-autoloads (file)
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"Update the autoloads for FILE in `generated-autoload-file'
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\(which FILE might bind in its local variables)."
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(interactive "fUpdate autoloads for file: ")
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(let ((load-name (let ((name (file-name-nondirectory file)))
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(if (string-match "\\.elc?$" name)
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(substring name 0 (match-beginning 0))
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name)))
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(found nil)
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(existing-buffer (get-file-buffer file)))
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(save-excursion
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;; We want to get a value for generated-autoload-file from
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;; the local variables section if it's there.
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(if existing-buffer
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(set-buffer existing-buffer))
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(set-buffer (find-file-noselect generated-autoload-file))
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(save-excursion
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(save-restriction
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(widen)
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(goto-char (point-min))
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;; Look for the section for LOAD-NAME.
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(while (and (not found)
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(search-forward generate-autoload-section-header nil t))
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(let ((form (condition-case ()
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(read (current-buffer))
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(end-of-file nil))))
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(cond ((string= (nth 2 form) load-name)
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;; We found the section for this file.
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;; Check if it is up to date.
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(let ((begin (match-beginning 0))
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(last-time (nth 4 form))
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(file-time (nth 5 (file-attributes file))))
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(if (and (or (null existing-buffer)
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(not (buffer-modified-p existing-buffer)))
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(listp last-time) (= (length last-time) 2)
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(or (> (car last-time) (car file-time))
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(and (= (car last-time) (car file-time))
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(>= (nth 1 last-time)
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(nth 1 file-time)))))
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(progn
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(if (interactive-p)
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(message "\
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Autoload section for %s is up to date."
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file))
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(setq found 'up-to-date))
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(search-forward generate-autoload-section-trailer)
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(delete-region begin (point))
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(setq found t))))
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((string< load-name (nth 2 form))
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;; We've come to a section alphabetically later than
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;; LOAD-NAME. We assume the file is in order and so
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;; there must be no section for LOAD-NAME. We will
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;; insert one before the section here.
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(goto-char (match-beginning 0))
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(setq found 'new)))))
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(or found
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(progn
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(setq found 'new)
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;; No later sections in the file. Put before the last page.
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(goto-char (point-max))
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(search-backward "\f")))
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(or (eq found 'up-to-date)
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(and (eq found 'new)
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;; Check that FILE has any cookies before generating a
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;; new section for it.
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(save-excursion
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(if existing-buffer
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(set-buffer existing-buffer)
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;; It is faster to avoid visiting the file.
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(set-buffer (get-buffer-create " *autoload-file*"))
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(kill-all-local-variables)
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(erase-buffer)
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(setq buffer-undo-list t
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buffer-read-only nil)
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(emacs-lisp-mode)
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(insert-file-contents file nil))
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(save-excursion
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(save-restriction
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(widen)
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(goto-char (point-min))
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(prog1
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(if (search-forward
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(concat "\n" generate-autoload-cookie)
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nil t)
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nil
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(if (interactive-p)
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(message "%s has no autoloads" file))
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t)
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(or existing-buffer
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(kill-buffer (current-buffer))))))))
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(generate-file-autoloads file))))
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(if (interactive-p) (save-buffer)))))
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;;;###autoload
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(defun update-autoloads-from-directory (dir)
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"\
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Update loaddefs.el with all the current autoloads from DIR, and no old ones.
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This uses `update-file-autoloads' (which see) do its work."
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(interactive "DUpdate autoloads from directory: ")
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(setq dir (expand-file-name dir))
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(let ((files (directory-files dir nil "^[^=].*\\.el$")))
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(save-excursion
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(set-buffer (find-file-noselect
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(if (file-exists-p generated-autoload-file)
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generated-autoload-file
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(expand-file-name generated-autoload-file
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dir))))
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(save-excursion
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(goto-char (point-min))
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(while (search-forward generate-autoload-section-header nil t)
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(let* ((form (condition-case ()
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(read (current-buffer))
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(end-of-file nil)))
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(file (nth 3 form)))
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(cond ((not (stringp file)))
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((not (file-exists-p (expand-file-name file dir)))
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;; Remove the obsolete section.
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(let ((begin (match-beginning 0)))
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(search-forward generate-autoload-section-trailer)
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(delete-region begin (point))))
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(t
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(update-file-autoloads file)))
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(setq files (delete file files)))))
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;; Elements remaining in FILES have no existing autoload sections.
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(mapcar 'update-file-autoloads files)
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(save-buffer))))
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;;;###autoload
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(defun batch-update-autoloads ()
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"Update loaddefs.el autoloads in batch mode.
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Calls `update-autoloads-from-directory' on each command line argument."
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(mapcar 'update-autoloads-from-directory command-line-args-left)
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(setq command-line-args-left nil))
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(provide 'autoload)
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;;; autoload.el ends here
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