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-rw-r--r--bitbake/lib/bb/parse/parse_c/BBHandler.py188
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diff --git a/bitbake/lib/bb/parse/parse_c/BBHandler.py b/bitbake/lib/bb/parse/parse_c/BBHandler.py
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1# ex:ts=4:sw=4:sts=4:et
2# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
3"""class for handling .bb files (using a C++ parser)
4
5 Reads a .bb file and obtains its metadata (using a C++ parser)
6
7 Copyright (C) 2006 Tim Robert Ansell
8 Copyright (C) 2006 Holger Hans Peter Freyther
9
10 This program is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free Software
12 Foundation; either version 2 of the License, or (at your option) any later
13 version.
14
15 Permission is hereby granted, free of charge, to any person obtaining a copy
16 of this software and associated documentation files (the "Software"), to deal
17 in the Software without restriction, including without limitation the rights
18 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
19 copies of the Software, and to permit persons to whom the Software is
20 furnished to do so, subject to the following conditions:
21
22 The above copyright notice and this permission notice shall be included in all
23 copies or substantial portions of the Software.
24
25 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
26 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
27 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
28 SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
29 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
30 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
31 THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32"""
33
34import os, sys
35
36# The Module we will use here
37import bb
38
39from bitbakec import parsefile
40
41#
42# This is the Python Part of the Native Parser Implementation.
43# We will only parse .bbclass, .inc and .bb files but no
44# configuration files.
45# supports, init and handle are the public methods used by
46# parser module
47#
48# The rest of the methods are internal implementation details.
49
50def _init(fn, d):
51 """
52 Initialize the data implementation with values of
53 the environment and data from the file.
54 """
55 pass
56
57#
58# public
59#
60def supports(fn, data):
61 return fn[-3:] == ".bb" or fn[-8:] == ".bbclass" or fn[-4:] == ".inc" or fn[-5:] == ".conf"
62
63def init(fn, data):
64 if not bb.data.getVar('TOPDIR', data):
65 bb.data.setVar('TOPDIR', os.getcwd(), data)
66 if not bb.data.getVar('BBPATH', data):
67 bb.data.setVar('BBPATH', os.path.join(sys.prefix, 'share', 'bitbake'), data)
68
69def handle_inherit(d):
70 """
71 Handle inheriting of classes. This will load all default classes.
72 It could be faster, it could detect infinite loops but this is todo
73 Also this delayed loading of bb.parse could impose a penalty
74 """
75 from bb.parse import handle
76
77 files = (data.getVar('INHERIT', d, True) or "").split()
78 if not "base" in i:
79 files[0:0] = ["base"]
80
81 __inherit_cache = data.getVar('__inherit_cache', d) or []
82 for f in files:
83 file = data.expand(f, d)
84 if file[0] != "/" and file[-8:] != ".bbclass":
85 file = os.path.join('classes', '%s.bbclass' % file)
86
87 if not file in __inherit_cache:
88 debug(2, "BB %s:%d: inheriting %s" % (fn, lineno, file))
89 __inherit_cache.append( file )
90
91 try:
92 handle(file, d, True)
93 except IOError:
94 print "Failed to inherit %s" % file
95 data.setVar('__inherit_cache', __inherit_cache, d)
96
97
98def handle(fn, d, include):
99 from bb import data, parse
100
101 (root, ext) = os.path.splitext(os.path.basename(fn))
102 base_name = "%s%s" % (root,ext)
103
104 # initialize with some data
105 init(fn,d)
106
107 # check if we include or are the beginning
108 oldfile = None
109 if include:
110 oldfile = d.getVar('FILE', False)
111 is_conf = False
112 elif ext == ".conf":
113 is_conf = True
114 data.inheritFromOS(d)
115
116 # find the file
117 if not os.path.isabs(fn):
118 abs_fn = bb.which(d.getVar('BBPATH', True), fn)
119 else:
120 abs_fn = fn
121
122 # check if the file exists
123 if not os.path.exists(abs_fn):
124 raise IOError("file '%(fn)s' not found" % locals() )
125
126 # now we know the file is around mark it as dep
127 if include:
128 parse.mark_dependency(d, abs_fn)
129
130 # manipulate the bbpath
131 if ext != ".bbclass" and ext != ".conf":
132 old_bb_path = data.getVar('BBPATH', d)
133 data.setVar('BBPATH', os.path.dirname(abs_fn) + (":%s" %old_bb_path) , d)
134
135 # handle INHERITS and base inherit
136 if ext != ".bbclass" and ext != ".conf":
137 data.setVar('FILE', fn, d)
138 handle_interit(d)
139
140 # now parse this file - by defering it to C++
141 parsefile(abs_fn, d, is_conf)
142
143 # Finish it up
144 if include == 0:
145 data.expandKeys(d)
146 data.update_data(d)
147 #### !!! XXX Finish it up by executing the anonfunc
148
149
150 # restore the original FILE
151 if oldfile:
152 d.setVar('FILE', oldfile)
153
154 # restore bbpath
155 if ext != ".bbclass" and ext != ".conf":
156 data.setVar('BBPATH', old_bb_path, d )
157
158
159 return d
160
161
162# Needed for BitBake files...
163__pkgsplit_cache__={}
164def vars_from_file(mypkg, d):
165 if not mypkg:
166 return (None, None, None)
167 if mypkg in __pkgsplit_cache__:
168 return __pkgsplit_cache__[mypkg]
169
170 myfile = os.path.splitext(os.path.basename(mypkg))
171 parts = myfile[0].split('_')
172 __pkgsplit_cache__[mypkg] = parts
173 exp = 3 - len(parts)
174 tmplist = []
175 while exp != 0:
176 exp -= 1
177 tmplist.append(None)
178 parts.extend(tmplist)
179 return parts
180
181
182
183
184# Inform bitbake that we are a parser
185# We need to define all three
186from bb.parse import handlers
187handlers.append( {'supports' : supports, 'handle': handle, 'init' : init})
188del handlers