mirror of
git://git.sv.gnu.org/emacs.git
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bc511a64f6
Most of this change is to boilerplate commentary such as license URLs. This change was prompted by ftp://ftp.gnu.org's going-away party, planned for November. Change these FTP URLs to https://ftp.gnu.org instead. Make similar changes for URLs to other organizations moving away from FTP. Also, change HTTP to HTTPS for URLs to gnu.org and fsf.org when this works, as this will further help defend against man-in-the-middle attacks (for this part I omitted the MS-DOS and MS-Windows sources and the test tarballs to keep the workload down). HTTPS is not fully working to lists.gnu.org so I left those URLs alone for now.
96 lines
3.6 KiB
EmacsLisp
96 lines
3.6 KiB
EmacsLisp
;;; autoconf.el --- mode for editing Autoconf configure.ac files
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;; Copyright (C) 2000-2017 Free Software Foundation, Inc.
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;; Author: Dave Love <fx@gnu.org>
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;; Keywords: languages
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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 3 of the License, or
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;; (at your option) 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. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Provides fairly minimal font-lock, imenu and indentation support
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;; for editing configure.ac files. Only Autoconf syntax is processed.
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;; There is no attempt to deal with shell text -- probably that will
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;; always lose.
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;; This is specialized for configure.ac files. It doesn't inherit the
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;; general M4 stuff from M4 mode.
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;; There is also an autoconf-mode.el in existence. That appears to be
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;; for editing the Autoconf M4 source, rather than configure.ac files.
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;;; Code:
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(defvar autoconf-mode-map (make-sparse-keymap))
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(defvar autoconf-mode-hook nil
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"Hook run by `autoconf-mode'.")
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(defconst autoconf-definition-regexp
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"A\\(?:H_TEMPLATE\\|C_\\(?:SUBST\\|DEFINE\\(?:_UNQUOTED\\)?\\)\\)(\\[*\\(\\(?:\\sw\\|\\s_\\)+\\)\\]*")
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(defvar autoconf-font-lock-keywords
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`(("\\_<A[CHMS]_\\(?:\\sw\\|\\s_\\)+" . font-lock-keyword-face)
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(,autoconf-definition-regexp
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1 font-lock-function-name-face)
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;; Are any other M4 keywords really appropriate for configure.ac,
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;; given that we do `dnl'?
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("changequote" . font-lock-keyword-face)))
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(defvar autoconf-mode-syntax-table
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(let ((table (make-syntax-table)))
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(modify-syntax-entry ?\" "." table)
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(modify-syntax-entry ?\n ">" table)
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(modify-syntax-entry ?# "<" table)
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table))
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(defvar autoconf-imenu-generic-expression
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(list (list nil autoconf-definition-regexp 1)))
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;; It's not clear how best to implement this.
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(defun autoconf-current-defun-function ()
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"Function to use for `add-log-current-defun-function' in Autoconf mode.
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This version looks back for an AC_DEFINE or AC_SUBST. It will stop
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searching backwards at another AC_... command."
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(save-excursion
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(skip-syntax-forward "w_" (line-end-position))
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(if (re-search-backward autoconf-definition-regexp
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(save-excursion (beginning-of-defun) (point))
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t)
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(match-string-no-properties 1))))
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;;;###autoload
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(define-derived-mode autoconf-mode prog-mode "Autoconf"
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"Major mode for editing Autoconf configure.ac files."
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(setq-local parens-require-spaces nil) ; for M4 arg lists
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(setq-local defun-prompt-regexp "^[ \t]*A[CM]_\\(\\sw\\|\\s_\\)+")
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(setq-local comment-start "dnl ")
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;; We want to avoid matching "dnl" in other text.
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(setq-local comment-start-skip "\\(?:\\(\\W\\|^\\)dnl\\|#\\) +")
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(setq-local syntax-propertize-function
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(syntax-propertize-rules ("\\<dnl\\>" (0 "<"))))
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(setq-local font-lock-defaults
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`(autoconf-font-lock-keywords nil nil))
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(setq-local imenu-generic-expression autoconf-imenu-generic-expression)
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(setq-local indent-line-function #'indent-relative)
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(setq-local add-log-current-defun-function
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#'autoconf-current-defun-function))
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(provide 'autoconf-mode)
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(provide 'autoconf)
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;;; autoconf.el ends here
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