97 lines
3.6 KiB
EmacsLisp
97 lines
3.6 KiB
EmacsLisp
;;; autoconf.el --- mode for editing Autoconf configure.ac files -*- lexical-binding: t; -*-
|
|
|
|
;; Copyright (C) 2000-2024 Free Software Foundation, Inc.
|
|
|
|
;; Author: Dave Love <fx@gnu.org>
|
|
;; Keywords: languages
|
|
|
|
;; 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 3 of the License, 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. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;; Provides fairly minimal font-lock, imenu and indentation support
|
|
;; for editing configure.ac files. Only Autoconf syntax is processed.
|
|
;; There is no attempt to deal with shell text -- probably that will
|
|
;; always lose.
|
|
|
|
;; This is specialized for configure.ac files. It doesn't inherit the
|
|
;; general M4 stuff from M4 mode.
|
|
|
|
;; There is also an autoconf-mode.el in existence. That appears to be
|
|
;; for editing the Autoconf M4 source, rather than configure.ac files.
|
|
|
|
;;; Code:
|
|
|
|
(defvar-keymap autoconf-mode-map)
|
|
|
|
(defvar autoconf-mode-hook nil
|
|
"Hook run by `autoconf-mode'.")
|
|
|
|
(defconst autoconf-definition-regexp
|
|
"A\\(?:H_TEMPLATE\\|C_\\(?:SUBST\\|DEFINE\\(?:_UNQUOTED\\)?\\)\\)(\\[*\\(\\(?:\\sw\\|\\s_\\)+\\)\\]*")
|
|
|
|
(defvar autoconf-font-lock-keywords
|
|
`(("\\_<\\(?:A[CHMS]\\|LT\\)_\\(?:\\sw\\|\\s_\\)+" . font-lock-keyword-face)
|
|
(,autoconf-definition-regexp
|
|
1 font-lock-function-name-face)
|
|
;; Are any other M4 keywords really appropriate for configure.ac,
|
|
;; given that we do `dnl'?
|
|
("changequote" . font-lock-keyword-face)))
|
|
|
|
(defvar autoconf-mode-syntax-table
|
|
(let ((table (make-syntax-table)))
|
|
(modify-syntax-entry ?\" "." table)
|
|
(modify-syntax-entry ?\n ">" table)
|
|
(modify-syntax-entry ?# "<" table)
|
|
table))
|
|
|
|
(defvar autoconf-imenu-generic-expression
|
|
(list (list nil autoconf-definition-regexp 1)))
|
|
|
|
;; It's not clear how best to implement this.
|
|
(defun autoconf-current-defun-function ()
|
|
"Function to use for `add-log-current-defun-function' in Autoconf mode.
|
|
This version looks back for an AC_DEFINE or AC_SUBST. It will stop
|
|
searching backwards at another AC_... command."
|
|
(save-excursion
|
|
(skip-syntax-forward "w_" (line-end-position))
|
|
(if (re-search-backward autoconf-definition-regexp
|
|
(save-excursion (beginning-of-defun) (point))
|
|
t)
|
|
(match-string-no-properties 1))))
|
|
|
|
;;;###autoload
|
|
(define-derived-mode autoconf-mode prog-mode "Autoconf"
|
|
"Major mode for editing Autoconf configure.ac files."
|
|
(setq-local parens-require-spaces nil) ; for M4 arg lists
|
|
(setq-local defun-prompt-regexp "^[ \t]*A[CM]_\\(\\sw\\|\\s_\\)+")
|
|
(setq-local comment-start "dnl ")
|
|
;; We want to avoid matching "dnl" in other text.
|
|
(setq-local comment-start-skip "\\(?:\\(\\W\\|^\\)dnl\\|#\\) +")
|
|
(setq-local syntax-propertize-function
|
|
(syntax-propertize-rules ("\\<dnl\\>" (0 "<"))))
|
|
(setq-local font-lock-defaults
|
|
'(autoconf-font-lock-keywords nil nil))
|
|
(setq-local imenu-generic-expression autoconf-imenu-generic-expression)
|
|
(setq-local indent-line-function #'indent-relative)
|
|
(setq-local add-log-current-defun-function
|
|
#'autoconf-current-defun-function))
|
|
|
|
(provide 'autoconf-mode)
|
|
(provide 'autoconf)
|
|
|
|
;;; autoconf.el ends here
|