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c4444d16 | 1 | ;;; autoconf.el --- mode for editing Autoconf configure.ac files |
c926a73b | 2 | |
ba318903 | 3 | ;; Copyright (C) 2000-2014 Free Software Foundation, Inc. |
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4 | |
5 | ;; Author: Dave Love <fx@gnu.org> | |
6 | ;; Keywords: languages | |
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7 | |
8 | ;; This file is part of GNU Emacs. | |
9 | ||
b1fc2b50 | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
c926a73b | 11 | ;; it under the terms of the GNU General Public License as published by |
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12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
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14 | |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
b1fc2b50 | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
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22 | |
23 | ;;; Commentary: | |
24 | ||
25 | ;; Provides fairly minimal font-lock, imenu and indentation support | |
c4444d16 | 26 | ;; for editing configure.ac files. Only Autoconf syntax is processed. |
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27 | ;; There is no attempt to deal with shell text -- probably that will |
28 | ;; always lose. | |
29 | ||
c4444d16 | 30 | ;; This is specialized for configure.ac files. It doesn't inherit the |
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31 | ;; general M4 stuff from M4 mode. |
32 | ||
33 | ;; There is also an autoconf-mode.el in existence. That appears to be | |
c4444d16 | 34 | ;; for editing the Autoconf M4 source, rather than configure.ac files. |
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35 | |
36 | ;;; Code: | |
37 | ||
38 | (defvar autoconf-mode-map (make-sparse-keymap)) | |
39 | ||
40 | (defvar autoconf-mode-hook nil | |
41 | "Hook run by `autoconf-mode'.") | |
42 | ||
c926a73b | 43 | (defconst autoconf-definition-regexp |
1d5963cc | 44 | "A\\(?:H_TEMPLATE\\|C_\\(?:SUBST\\|DEFINE\\(?:_UNQUOTED\\)?\\)\\)(\\[*\\(\\(?:\\sw\\|\\s_\\)+\\)\\]*") |
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45 | |
46 | (defvar autoconf-font-lock-keywords | |
1d5963cc | 47 | `(("\\_<A[CHMS]_\\(?:\\sw\\|\\s_\\)+" . font-lock-keyword-face) |
c926a73b | 48 | (,autoconf-definition-regexp |
0d26d7c4 | 49 | 1 font-lock-function-name-face) |
c4444d16 | 50 | ;; Are any other M4 keywords really appropriate for configure.ac, |
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51 | ;; given that we do `dnl'? |
52 | ("changequote" . font-lock-keyword-face))) | |
53 | ||
54 | (defvar autoconf-mode-syntax-table | |
55 | (let ((table (make-syntax-table))) | |
56 | (modify-syntax-entry ?\" "." table) | |
57 | (modify-syntax-entry ?\n ">" table) | |
58 | (modify-syntax-entry ?# "<" table) | |
59 | table)) | |
60 | ||
61 | (defvar autoconf-imenu-generic-expression | |
0d26d7c4 | 62 | (list (list nil autoconf-definition-regexp 1))) |
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63 | |
64 | ;; It's not clear how best to implement this. | |
65 | (defun autoconf-current-defun-function () | |
66 | "Function to use for `add-log-current-defun-function' in Autoconf mode. | |
67 | This version looks back for an AC_DEFINE or AC_SUBST. It will stop | |
68 | searching backwards at another AC_... command." | |
69 | (save-excursion | |
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70 | (skip-syntax-forward "w_" (line-end-position)) |
71 | (if (re-search-backward autoconf-definition-regexp | |
72 | (save-excursion (beginning-of-defun) (point)) | |
73 | t) | |
74 | (match-string-no-properties 1)))) | |
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75 | |
76 | ;;;###autoload | |
175069ef | 77 | (define-derived-mode autoconf-mode prog-mode "Autoconf" |
c4444d16 | 78 | "Major mode for editing Autoconf configure.ac files." |
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79 | (setq-local parens-require-spaces nil) ; for M4 arg lists |
80 | (setq-local defun-prompt-regexp "^[ \t]*A[CM]_\\(\\sw\\|\\s_\\)+") | |
81 | (setq-local comment-start "dnl ") | |
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82 | ;; We want to avoid matching "dnl" in other text. |
83 | (setq-local comment-start-skip "\\(?:\\(\\W\\|^\\)dnl\\|#\\) +") | |
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84 | (setq-local syntax-propertize-function |
85 | (syntax-propertize-rules ("\\<dnl\\>" (0 "<")))) | |
86 | (setq-local font-lock-defaults | |
1d5963cc | 87 | `(autoconf-font-lock-keywords nil nil)) |
92eadba5 | 88 | (setq-local imenu-generic-expression autoconf-imenu-generic-expression) |
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89 | (setq-local indent-line-function #'indent-relative) |
90 | (setq-local add-log-current-defun-function | |
91 | #'autoconf-current-defun-function)) | |
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92 | |
93 | (provide 'autoconf-mode) | |
15120dec | 94 | (provide 'autoconf) |
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95 | |
96 | ;;; autoconf.el ends here |