1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
;;; cfengine.el --- mode for editing Cfengine files
;; Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
;; 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 2, 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Provides support for editing GNU Cfengine files, including
;; font-locking, Imenu and indention, but with no special keybindings.
;; Possible customization for auto-mode selection:
;; (push '(("^cfagent.conf\\'" . cfengine-mode)) auto-mode-alist)
;; (push '(("^cf\\." . cfengine-mode)) auto-mode-alist)
;; This is not the same as the mode written by Rolf Ebert
;; <ebert@waporo.muc.de>, distributed with cfengine-2.0.5. It does
;; better fontification and indentation, inter alia.
;;; Code:
(defgroup cfengine ()
"Editing Cfengine files."
:group 'languages)
(defcustom cfengine-indent 2
"*Size of a Cfengine indentation step in columns."
:group 'cfengine
:type 'integer)
(defcustom cfengine-mode-abbrevs nil
"Abbrevs for Cfengine mode."
:group 'cfengine
:type '(repeat (list (string :tag "Name")
(string :tag "Expansion")
(choice :tag "Hook" (const nil) function))))
;; Taken from the doc for pre-release 2.1.
(eval-and-compile
(defconst cfengine-actions
'("acl" "alerts" "binservers" "broadcast" "control" "classes" "copy"
"defaultroute" "disks" "directories" "disable" "editfiles" "files"
"filters" "groups" "homeservers" "ignore" "import" "interfaces"
"links" "mailserver" "methods" "miscmounts" "mountables"
"processes" "packages" "rename" "required" "resolve"
"shellcommands" "tidy" "unmount"
;; cfservd
"admit" "grant" "deny")
"List of the action keywords supported by Cfengine.
This includes those for cfservd as well as cfagent."))
(defvar cfengine-font-lock-keywords
`(;; Actions.
;; List the allowed actions explicitly, so that errors are more obvious.
(,(concat "^[ \t]*" (eval-when-compile
(regexp-opt cfengine-actions t))
":")
1 font-lock-keyword-face)
;; Classes.
("^[ \t]*\\([[:alnum:]_().|!]+\\)::" 1 font-lock-function-name-face)
;; Variables.
("$(\\([[:alnum:]_]+\\))" 1 font-lock-variable-name-face)
("${\\([[:alnum:]_]+\\)}" 1 font-lock-variable-name-face)
;; Variable definitions.
("\\<\\([[:alnum:]_]+\\)[ \t]*=[ \t]*(" 1 font-lock-variable-name-face)
;; File, acl &c in group: { token ... }
("{[ \t]*\\([^ \t\n]+\\)" 1 font-lock-constant-face)))
(defvar cfengine-imenu-expression
`((nil ,(concat "^[ \t]*" (eval-when-compile
(regexp-opt cfengine-actions t))
":[^:]")
1)
("Variables/classes" "\\<\\([[:alnum:]_]+\\)[ \t]*=[ \t]*(" 1)
("Variables/classes" "\\<define=\\([[:alnum:]_]+\\)" 1)
("Variables/classes" "\\<DefineClass\\>[ \t]+\\([[:alnum:]_]+\\)" 1))
"`imenu-generic-expression' for Cfengine mode.")
(defun cfengine-outline-level ()
"`outline-level' function for Cfengine mode."
(if (looking-at "[^:]+\\(?:[:]+\\)$")
(length (match-string 1))))
(defun cfengine-beginning-of-defun ()
"`beginning-of-defun' function for Cfengine mode.
Treats actions as defuns."
(unless (<= (current-column) (current-indentation))
(end-of-line))
(if (re-search-backward "^[[:alpha:]]+: *$" nil t)
(beginning-of-line)
(goto-char (point-min)))
t)
(defun cfengine-end-of-defun ()
"`end-of-defun' function for Cfengine mode.
Treats actions as defuns."
(end-of-line)
(if (re-search-forward "^[[:alpha:]]+: *$" nil t)
(beginning-of-line)
(goto-char (point-max)))
t)
;; Fixme: Should get an extra indent step in editfiles BeginGroup...s.
(defun cfengine-indent-line ()
"Indent a line in Cfengine mode.
Intended as the value of `indent-line-function'."
(let ((pos (- (point-max) (point))))
(save-restriction
(narrow-to-defun)
(back-to-indentation)
(cond
;; Action selectors aren't indented; class selectors are
;; indented one step.
((looking-at "[[:alnum:]_().|!]+:\\(:\\)?")
(if (match-string 1)
(indent-line-to cfengine-indent)
(indent-line-to 0)))
;; Outdent leading close brackets one step.
((or (eq ?\} (char-after))
(eq ?\) (char-after)))
(condition-case ()
(indent-line-to (save-excursion
(forward-char)
(backward-sexp)
(current-column)))
(error nil)))
;; Inside brackets/parens: indent to start column of non-comment
;; token on line following open bracket or by one step from open
;; bracket's column.
((condition-case ()
(progn (indent-line-to (save-excursion
(backward-up-list)
(forward-char)
(skip-chars-forward " \t")
(if (looking-at "[^\n#]")
(current-column)
(skip-chars-backward " \t")
(+ (current-column) -1
cfengine-indent))))
t)
(error nil)))
;; Indent by two steps after a class selector.
((save-excursion
(re-search-backward "^[ \t]*[[:alnum:]_().|!]+::" nil t))
(indent-line-to (* 2 cfengine-indent)))
;; Indent by one step if we're after an action header.
((save-excursion
(goto-char (point-min))
(looking-at "[[:alpha:]]+:[ \t]*$"))
(indent-line-to cfengine-indent))
;; Else don't indent.
(t
(indent-line-to 0))))
;; If initial point was within line's indentation,
;; position after the indentation. Else stay at same point in text.
(if (> (- (point-max) pos) (point))
(goto-char (- (point-max) pos)))))
;; This doesn't work too well in Emacs 21.2. See 22.1 development
;; code.
(defun cfengine-fill-paragraph (&optional justify)
"Fill `paragraphs' in Cfengine code."
(interactive "P")
(or (if (fboundp 'fill-comment-paragraph)
(fill-comment-paragraph justify) ; post Emacs 21.3
;; else do nothing in a comment
(nth 4 (parse-partial-sexp (save-excursion
(beginning-of-defun)
(point))
(point))))
(let ((paragraph-start
;; Include start of parenthesized block.
"\f\\|[ \t]*$\\|.*\(")
(paragraph-separate
;; Include action and class lines, start and end of
;; bracketed blocks and end of parenthesized blocks to
;; avoid including these in fill. This isn't ideal.
"[ \t\f]*$\\|.*#\\|.*[\){}]\\|\\s-*[[:alpha:]_().|!]+:")
fill-paragraph-function)
(fill-paragraph justify))
t))
;;;###autoload
(define-derived-mode cfengine-mode fundamental-mode "Cfengine"
"Major mode for editing cfengine input.
There are no special keybindings by default.
Action blocks are treated as defuns, i.e. \\[beginning-of-defun] moves
to the action header."
(modify-syntax-entry ?# "<" cfengine-mode-syntax-table)
(modify-syntax-entry ?\n ">#" cfengine-mode-syntax-table)
;; Shell commands can be quoted by single, double or back quotes.
;; It's debatable whether we should define string syntax, but it
;; should avoid potential confusion in some cases.
(modify-syntax-entry ?\" "\"" cfengine-mode-syntax-table)
(modify-syntax-entry ?\' "\"" cfengine-mode-syntax-table)
(modify-syntax-entry ?\` "\"" cfengine-mode-syntax-table)
;; variable substitution:
(modify-syntax-entry ?$ "." cfengine-mode-syntax-table)
;; Doze path separators:
(modify-syntax-entry ?\\ "_" cfengine-mode-syntax-table)
;; Otherwise, syntax defaults seem OK to give reasonable word
;; movement.
(set (make-local-variable 'parens-require-spaces) nil)
(set (make-local-variable 'require-final-newline) mode-require-final-newline)
(set (make-local-variable 'comment-start) "# ")
(set (make-local-variable 'comment-start-skip)
"\\(\\(?:^\\|[^\\\\\n]\\)\\(?:\\\\\\\\\\)*\\)#+[ \t]*")
(set (make-local-variable 'indent-line-function) #'cfengine-indent-line)
(set (make-local-variable 'outline-regexp) "[ \t]*\\(\\sw\\|\\s_\\)+:+")
(set (make-local-variable 'outline-level) #'cfengine-outline-level)
(set (make-local-variable 'fill-paragraph-function)
#'cfengine-fill-paragraph)
(define-abbrev-table 'cfengine-mode-abbrev-table cfengine-mode-abbrevs)
;; Fixme: Use `font-lock-syntactic-keywords' to set the args of
;; functions in evaluated classes to string syntax, and then obey
;; syntax properties.
(setq font-lock-defaults
'(cfengine-font-lock-keywords nil nil nil beginning-of-line))
(setq imenu-generic-expression cfengine-imenu-expression)
(set (make-local-variable 'beginning-of-defun-function)
#'cfengine-beginning-of-defun)
(set (make-local-variable 'end-of-defun-function) #'cfengine-end-of-defun)
;; Like Lisp mode. Without this, we lose with, say,
;; `backward-up-list' when there's an unbalanced quote in a
;; preceding comment.
(set (make-local-variable 'parse-sexp-ignore-comments) t))
(provide 'cfengine)
;;; arch-tag: 6b931be2-1505-4124-afa6-9675971e26d4
;;; cfengine.el ends here
|
