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author | Tudor Florea <tudor.florea@enea.com> | 2014-10-16 03:05:19 +0200 |
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committer | Tudor Florea <tudor.florea@enea.com> | 2014-10-16 03:05:19 +0200 |
commit | c527fd1f14c27855a37f2e8ac5346ce8d940ced2 (patch) | |
tree | bb002c1fdf011c41dbd2f0927bed23ecb5f83c97 /bitbake/lib/bb/parse/parse_py/ConfHandler.py | |
download | poky-c527fd1f14c27855a37f2e8ac5346ce8d940ced2.tar.gz |
initial commit for Enea Linux 4.0-140929daisy-140929
Migrated from the internal git server on the daisy-enea-point-release branch
Signed-off-by: Tudor Florea <tudor.florea@enea.com>
Diffstat (limited to 'bitbake/lib/bb/parse/parse_py/ConfHandler.py')
-rw-r--r-- | bitbake/lib/bb/parse/parse_py/ConfHandler.py | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/bitbake/lib/bb/parse/parse_py/ConfHandler.py b/bitbake/lib/bb/parse/parse_py/ConfHandler.py new file mode 100644 index 0000000000..978ebe4608 --- /dev/null +++ b/bitbake/lib/bb/parse/parse_py/ConfHandler.py | |||
@@ -0,0 +1,189 @@ | |||
1 | #!/usr/bin/env python | ||
2 | # ex:ts=4:sw=4:sts=4:et | ||
3 | # -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- | ||
4 | """ | ||
5 | class for handling configuration data files | ||
6 | |||
7 | Reads a .conf file and obtains its metadata | ||
8 | |||
9 | """ | ||
10 | |||
11 | # Copyright (C) 2003, 2004 Chris Larson | ||
12 | # Copyright (C) 2003, 2004 Phil Blundell | ||
13 | # | ||
14 | # This program is free software; you can redistribute it and/or modify | ||
15 | # it under the terms of the GNU General Public License version 2 as | ||
16 | # published by the Free Software Foundation. | ||
17 | # | ||
18 | # This program is distributed in the hope that it will be useful, | ||
19 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
20 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
21 | # GNU General Public License for more details. | ||
22 | # | ||
23 | # You should have received a copy of the GNU General Public License along | ||
24 | # with this program; if not, write to the Free Software Foundation, Inc., | ||
25 | # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
26 | |||
27 | import re, os | ||
28 | import logging | ||
29 | import bb.utils | ||
30 | from bb.parse import ParseError, resolve_file, ast, logger | ||
31 | |||
32 | __config_regexp__ = re.compile( r""" | ||
33 | ^ | ||
34 | (?P<exp>export\s*)? | ||
35 | (?P<var>[a-zA-Z0-9\-~_+.${}/]+?) | ||
36 | (\[(?P<flag>[a-zA-Z0-9\-_+.]+)\])? | ||
37 | |||
38 | \s* ( | ||
39 | (?P<colon>:=) | | ||
40 | (?P<lazyques>\?\?=) | | ||
41 | (?P<ques>\?=) | | ||
42 | (?P<append>\+=) | | ||
43 | (?P<prepend>=\+) | | ||
44 | (?P<predot>=\.) | | ||
45 | (?P<postdot>\.=) | | ||
46 | = | ||
47 | ) \s* | ||
48 | |||
49 | (?!'[^']*'[^']*'$) | ||
50 | (?!\"[^\"]*\"[^\"]*\"$) | ||
51 | (?P<apo>['\"]) | ||
52 | (?P<value>.*) | ||
53 | (?P=apo) | ||
54 | $ | ||
55 | """, re.X) | ||
56 | __include_regexp__ = re.compile( r"include\s+(.+)" ) | ||
57 | __require_regexp__ = re.compile( r"require\s+(.+)" ) | ||
58 | __export_regexp__ = re.compile( r"export\s+([a-zA-Z0-9\-_+.${}/]+)$" ) | ||
59 | |||
60 | def init(data): | ||
61 | topdir = data.getVar('TOPDIR') | ||
62 | if not topdir: | ||
63 | data.setVar('TOPDIR', os.getcwd()) | ||
64 | |||
65 | |||
66 | def supports(fn, d): | ||
67 | return fn[-5:] == ".conf" | ||
68 | |||
69 | def include(oldfn, fn, lineno, data, error_out): | ||
70 | """ | ||
71 | error_out: A string indicating the verb (e.g. "include", "inherit") to be | ||
72 | used in a ParseError that will be raised if the file to be included could | ||
73 | not be included. Specify False to avoid raising an error in this case. | ||
74 | """ | ||
75 | if oldfn == fn: # prevent infinite recursion | ||
76 | return None | ||
77 | |||
78 | import bb | ||
79 | fn = data.expand(fn) | ||
80 | oldfn = data.expand(oldfn) | ||
81 | |||
82 | if not os.path.isabs(fn): | ||
83 | dname = os.path.dirname(oldfn) | ||
84 | bbpath = "%s:%s" % (dname, data.getVar("BBPATH", True)) | ||
85 | abs_fn, attempts = bb.utils.which(bbpath, fn, history=True) | ||
86 | if abs_fn and bb.parse.check_dependency(data, abs_fn): | ||
87 | bb.warn("Duplicate inclusion for %s in %s" % (abs_fn, data.getVar('FILE', True))) | ||
88 | for af in attempts: | ||
89 | bb.parse.mark_dependency(data, af) | ||
90 | if abs_fn: | ||
91 | fn = abs_fn | ||
92 | elif bb.parse.check_dependency(data, fn): | ||
93 | bb.warn("Duplicate inclusion for %s in %s" % (fn, data.getVar('FILE', True))) | ||
94 | |||
95 | from bb.parse import handle | ||
96 | try: | ||
97 | ret = handle(fn, data, True) | ||
98 | except (IOError, OSError): | ||
99 | if error_out: | ||
100 | raise ParseError("Could not %(error_out)s file %(fn)s" % vars(), oldfn, lineno) | ||
101 | logger.debug(2, "CONF file '%s' not found", fn) | ||
102 | bb.parse.mark_dependency(data, fn) | ||
103 | |||
104 | # We have an issue where a UI might want to enforce particular settings such as | ||
105 | # an empty DISTRO variable. If configuration files do something like assigning | ||
106 | # a weak default, it turns out to be very difficult to filter out these changes, | ||
107 | # particularly when the weak default might appear half way though parsing a chain | ||
108 | # of configuration files. We therefore let the UIs hook into configuration file | ||
109 | # parsing. This turns out to be a hard problem to solve any other way. | ||
110 | confFilters = [] | ||
111 | |||
112 | def handle(fn, data, include): | ||
113 | init(data) | ||
114 | |||
115 | if include == 0: | ||
116 | oldfile = None | ||
117 | else: | ||
118 | oldfile = data.getVar('FILE') | ||
119 | |||
120 | abs_fn = resolve_file(fn, data) | ||
121 | f = open(abs_fn, 'r') | ||
122 | |||
123 | if include: | ||
124 | bb.parse.mark_dependency(data, abs_fn) | ||
125 | |||
126 | statements = ast.StatementGroup() | ||
127 | lineno = 0 | ||
128 | while True: | ||
129 | lineno = lineno + 1 | ||
130 | s = f.readline() | ||
131 | if not s: | ||
132 | break | ||
133 | w = s.strip() | ||
134 | # skip empty lines | ||
135 | if not w: | ||
136 | continue | ||
137 | s = s.rstrip() | ||
138 | while s[-1] == '\\': | ||
139 | s2 = f.readline().strip() | ||
140 | lineno = lineno + 1 | ||
141 | if (not s2 or s2 and s2[0] != "#") and s[0] == "#" : | ||
142 | bb.fatal("There is a confusing multiline, partially commented expression on line %s of file %s (%s).\nPlease clarify whether this is all a comment or should be parsed." % (lineno, fn, s)) | ||
143 | s = s[:-1] + s2 | ||
144 | # skip comments | ||
145 | if s[0] == '#': | ||
146 | continue | ||
147 | feeder(lineno, s, abs_fn, statements) | ||
148 | |||
149 | # DONE WITH PARSING... time to evaluate | ||
150 | data.setVar('FILE', abs_fn) | ||
151 | statements.eval(data) | ||
152 | if oldfile: | ||
153 | data.setVar('FILE', oldfile) | ||
154 | |||
155 | f.close() | ||
156 | |||
157 | for f in confFilters: | ||
158 | f(fn, data) | ||
159 | |||
160 | return data | ||
161 | |||
162 | def feeder(lineno, s, fn, statements): | ||
163 | m = __config_regexp__.match(s) | ||
164 | if m: | ||
165 | groupd = m.groupdict() | ||
166 | ast.handleData(statements, fn, lineno, groupd) | ||
167 | return | ||
168 | |||
169 | m = __include_regexp__.match(s) | ||
170 | if m: | ||
171 | ast.handleInclude(statements, fn, lineno, m, False) | ||
172 | return | ||
173 | |||
174 | m = __require_regexp__.match(s) | ||
175 | if m: | ||
176 | ast.handleInclude(statements, fn, lineno, m, True) | ||
177 | return | ||
178 | |||
179 | m = __export_regexp__.match(s) | ||
180 | if m: | ||
181 | ast.handleExport(statements, fn, lineno, m) | ||
182 | return | ||
183 | |||
184 | raise ParseError("unparsed line: '%s'" % s, fn, lineno); | ||
185 | |||
186 | # Add us to the handlers list | ||
187 | from bb.parse import handlers | ||
188 | handlers.append({'supports': supports, 'handle': handle, 'init': init}) | ||
189 | del handlers | ||