;;; autoconf-mode.el --- autoconf code editing commands for Emacs

;; Author: Martin Buchholz (martin@xemacs.org)

;; Maintainer: Martin Buchholz

;; Keywords: languages, faces, m4, configure

;; This file is part of Autoconf

;; Copyright (C) 2001, 2006, 2009-2012 Free Software Foundation, Inc.

;;

;; This program 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 3 of the License, or

;; (at your option) any later version.

;;

;; This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

;; A major mode for editing autoconf input (like configure.in).

;; Derived from m4-mode.el by Andrew Csillag (drew@staff.prodigy.com)

;;; Your should add the following to your Emacs configuration file:

;;  (autoload 'autoconf-mode "autoconf-mode"

;;            "Major mode for editing autoconf files." t)

;;  (setq auto-mode-alist

;;        (cons '("\\.ac\\'\\|configure\\.in\\'" . autoconf-mode)

;;              auto-mode-alist))

;;; Code:

;;thank god for make-regexp.el!

(defvar autoconf-font-lock-keywords

  `(("\\bdnl \\(.*\\)"  1 font-lock-comment-face t)

    ("\\$[0-9*#@]" . font-lock-variable-name-face)

    ("\\b\\(m4_\\)?\\(builtin\\|change\\(com\\|quote\\|word\\)\\|d\\(e\\(bug\\(file\\|mode\\)\\|cr\\|f\\(ine\\|n\\)\\)\\|iv\\(ert\\|num\\)\\|nl\\|umpdef\\)\\|e\\(rrprint\\|syscmd\\|val\\)\\|f\\(ile\\|ormat\\)\\|gnu\\|i\\(f\\(def\\|else\\)\\|n\\(c\\(lude\\|r\\)\\|d\\(ex\\|ir\\)\\)\\)\\|l\\(en\\|ine\\)\\|m\\(4\\(exit\\|wrap\\)\\|aketemp\\|kstemp\\)\\|p\\(atsubst\\|opdef\\|ushdef\\)\\|regexp\\|s\\(hift\\|include\\|ubstr\\|ys\\(cmd\\|val\\)\\)\\|tra\\(ceo\\(ff\\|n\\)\\|nslit\\)\\|un\\(d\\(efine\\|ivert\\)\\|ix\\)\\)\\b" . font-lock-keyword-face)

    ("^\\(\\(m4_\\)?define\\(_default\\)?\\|A._DEFUN\\|m4_defun\\(_once\\|_init\\)?\\)(\\[?\\([A-Za-z0-9_]+\\)" 5 font-lock-function-name-face)

    "default font-lock-keywords")

)

(defvar autoconf-mode-syntax-table nil

  "syntax table used in autoconf mode")

(setq autoconf-mode-syntax-table (make-syntax-table))

(modify-syntax-entry ?\" "\""  autoconf-mode-syntax-table)

;;(modify-syntax-entry ?\' "\""  autoconf-mode-syntax-table)

(modify-syntax-entry ?#  "<\n" autoconf-mode-syntax-table)

(modify-syntax-entry ?\n ">#"  autoconf-mode-syntax-table)

(modify-syntax-entry ?\( "()"   autoconf-mode-syntax-table)

(modify-syntax-entry ?\) ")("   autoconf-mode-syntax-table)

(modify-syntax-entry ?\[ "(]"  autoconf-mode-syntax-table)

(modify-syntax-entry ?\] ")["  autoconf-mode-syntax-table)

(modify-syntax-entry ?*  "."   autoconf-mode-syntax-table)

(modify-syntax-entry ?_  "_"   autoconf-mode-syntax-table)

(defvar autoconf-mode-map

  (let ((map (make-sparse-keymap)))

    (define-key map '[(control c) (\;)] 'comment-region)

    map))

(defun autoconf-current-defun ()

  "Autoconf value for `add-log-current-defun-function'.

This tells add-log.el how to find the current macro."

  (save-excursion

    (if (re-search-backward "^\\(m4_define\\(_default\\)?\\|m4_defun\\(_once\\|_init\\)?\\|A._DEFUN\\)(\\[*\\([A-Za-z0-9_]+\\)" nil t)

	(buffer-substring (match-beginning 4)

			  (match-end 4))

      nil)))

;;;###autoload

(defun autoconf-mode ()

  "A major-mode to edit Autoconf files like configure.ac.

\\{autoconf-mode-map}

"

  (interactive)

  (kill-all-local-variables)

  (use-local-map autoconf-mode-map)

  (make-local-variable 'add-log-current-defun-function)

  (setq add-log-current-defun-function 'autoconf-current-defun)

  (make-local-variable 'comment-start)

  (setq comment-start "# ")

  (make-local-variable 'parse-sexp-ignore-comments)

  (setq parse-sexp-ignore-comments t)

  (make-local-variable	'font-lock-defaults)

  (setq major-mode 'autoconf-mode)

  (setq mode-name "Autoconf")

  (setq font-lock-defaults `(autoconf-font-lock-keywords nil))

  (set-syntax-table autoconf-mode-syntax-table)

  (run-hooks 'autoconf-mode-hook))

(provide 'autoconf-mode)

;;; autoconf-mode.el ends here