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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"""
4BitBake Smart Dictionary Implementation
5
6Functions for interacting with the data structure used by the
7BitBake build tools.
8
9"""
10
11# Copyright (C) 2003, 2004 Chris Larson
12# Copyright (C) 2004, 2005 Seb Frankengul
13# Copyright (C) 2005, 2006 Holger Hans Peter Freyther
14# Copyright (C) 2005 Uli Luckas
15# Copyright (C) 2005 ROAD GmbH
16#
17# This program is free software; you can redistribute it and/or modify
18# it under the terms of the GNU General Public License version 2 as
19# published by the Free Software Foundation.
20#
21# This program is distributed in the hope that it will be useful,
22# but WITHOUT ANY WARRANTY; without even the implied warranty of
23# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24# GNU General Public License for more details.
25#
26# You should have received a copy of the GNU General Public License along
27# with this program; if not, write to the Free Software Foundation, Inc.,
28# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
29# Based on functions from the base bb module, Copyright 2003 Holger Schurig
30
31import copy, os, re, sys, time, types
32import bb
33from bb import utils, methodpool
34from COW import COWDictBase
35from new import classobj
36
37
38__setvar_keyword__ = ["_append","_prepend"]
39__setvar_regexp__ = re.compile('(?P<base>.*?)(?P<keyword>_append|_prepend)(_(?P<add>.*))?')
40__expand_var_regexp__ = re.compile(r"\${[^{}]+}")
41__expand_python_regexp__ = re.compile(r"\${@.+?}")
42
43
44class DataSmart:
45 def __init__(self, special = COWDictBase.copy(), seen = COWDictBase.copy() ):
46 self.dict = {}
47
48 # cookie monster tribute
49 self._special_values = special
50 self._seen_overrides = seen
51
52 self.expand_cache = {}
53
54 def expand(self,s, varname):
55 def var_sub(match):
56 key = match.group()[2:-1]
57 if varname and key:
58 if varname == key:
59 raise Exception("variable %s references itself!" % varname)
60 var = self.getVar(key, 1)
61 if var is not None:
62 return var
63 else:
64 return match.group()
65
66 def python_sub(match):
67 import bb
68 code = match.group()[3:-1]
69 locals()['d'] = self
70 s = eval(code)
71 if type(s) == types.IntType: s = str(s)
72 return s
73
74 if type(s) is not types.StringType: # sanity check
75 return s
76
77 if varname and varname in self.expand_cache:
78 return self.expand_cache[varname]
79
80 while s.find('${') != -1:
81 olds = s
82 try:
83 s = __expand_var_regexp__.sub(var_sub, s)
84 s = __expand_python_regexp__.sub(python_sub, s)
85 if s == olds: break
86 if type(s) is not types.StringType: # sanity check
87 bb.msg.error(bb.msg.domain.Data, 'expansion of %s returned non-string %s' % (olds, s))
88 except KeyboardInterrupt:
89 raise
90 except:
91 bb.msg.note(1, bb.msg.domain.Data, "%s:%s while evaluating:\n%s" % (sys.exc_info()[0], sys.exc_info()[1], s))
92 raise
93
94 if varname:
95 self.expand_cache[varname] = s
96
97 return s
98
99 def initVar(self, var):
100 self.expand_cache = {}
101 if not var in self.dict:
102 self.dict[var] = {}
103
104 def _findVar(self,var):
105 _dest = self.dict
106
107 while (_dest and var not in _dest):
108 if not "_data" in _dest:
109 _dest = None
110 break
111 _dest = _dest["_data"]
112
113 if _dest and var in _dest:
114 return _dest[var]
115 return None
116
117 def _makeShadowCopy(self, var):
118 if var in self.dict:
119 return
120
121 local_var = self._findVar(var)
122
123 if local_var:
124 self.dict[var] = copy.copy(local_var)
125 else:
126 self.initVar(var)
127
128 def setVar(self,var,value):
129 self.expand_cache = {}
130 match = __setvar_regexp__.match(var)
131 if match and match.group("keyword") in __setvar_keyword__:
132 base = match.group('base')
133 keyword = match.group("keyword")
134 override = match.group('add')
135 l = self.getVarFlag(base, keyword) or []
136 l.append([value, override])
137 self.setVarFlag(base, keyword, l)
138
139 # todo make sure keyword is not __doc__ or __module__
140 # pay the cookie monster
141 try:
142 self._special_values[keyword].add( base )
143 except:
144 self._special_values[keyword] = set()
145 self._special_values[keyword].add( base )
146
147 return
148
149 if not var in self.dict:
150 self._makeShadowCopy(var)
151
152 # more cookies for the cookie monster
153 if '_' in var:
154 override = var[var.rfind('_')+1:]
155 if not self._seen_overrides.has_key(override):
156 self._seen_overrides[override] = set()
157 self._seen_overrides[override].add( var )
158
159 # setting var
160 self.dict[var]["content"] = value
161
162 def getVar(self,var,exp):
163 value = self.getVarFlag(var,"content")
164
165 if exp and value:
166 return self.expand(value,var)
167 return value
168
169 def renameVar(self, key, newkey):
170 """
171 Rename the variable key to newkey
172 """
173 val = self.getVar(key, 0)
174 if val is not None:
175 self.setVar(newkey, val)
176
177 for i in ('_append', '_prepend'):
178 src = self.getVarFlag(key, i)
179 if src is None:
180 continue
181
182 dest = self.getVarFlag(newkey, i) or []
183 dest.extend(src)
184 self.setVarFlag(newkey, i, dest)
185
186 if self._special_values.has_key(i) and key in self._special_values[i]:
187 self._special_values[i].remove(key)
188 self._special_values[i].add(newkey)
189
190 self.delVar(key)
191
192 def delVar(self,var):
193 self.expand_cache = {}
194 self.dict[var] = {}
195
196 def setVarFlag(self,var,flag,flagvalue):
197 if not var in self.dict:
198 self._makeShadowCopy(var)
199 self.dict[var][flag] = flagvalue
200
201 def getVarFlag(self,var,flag):
202 local_var = self._findVar(var)
203 if local_var:
204 if flag in local_var:
205 return copy.copy(local_var[flag])
206 return None
207
208 def delVarFlag(self,var,flag):
209 local_var = self._findVar(var)
210 if not local_var:
211 return
212 if not var in self.dict:
213 self._makeShadowCopy(var)
214
215 if var in self.dict and flag in self.dict[var]:
216 del self.dict[var][flag]
217
218 def setVarFlags(self,var,flags):
219 if not var in self.dict:
220 self._makeShadowCopy(var)
221
222 for i in flags.keys():
223 if i == "content":
224 continue
225 self.dict[var][i] = flags[i]
226
227 def getVarFlags(self,var):
228 local_var = self._findVar(var)
229 flags = {}
230
231 if local_var:
232 for i in local_var.keys():
233 if i == "content":
234 continue
235 flags[i] = local_var[i]
236
237 if len(flags) == 0:
238 return None
239 return flags
240
241
242 def delVarFlags(self,var):
243 if not var in self.dict:
244 self._makeShadowCopy(var)
245
246 if var in self.dict:
247 content = None
248
249 # try to save the content
250 if "content" in self.dict[var]:
251 content = self.dict[var]["content"]
252 self.dict[var] = {}
253 self.dict[var]["content"] = content
254 else:
255 del self.dict[var]
256
257
258 def createCopy(self):
259 """
260 Create a copy of self by setting _data to self
261 """
262 # we really want this to be a DataSmart...
263 data = DataSmart(seen=self._seen_overrides.copy(), special=self._special_values.copy())
264 data.dict["_data"] = self.dict
265
266 return data
267
268 # Dictionary Methods
269 def keys(self):
270 def _keys(d, mykey):
271 if "_data" in d:
272 _keys(d["_data"],mykey)
273
274 for key in d.keys():
275 if key != "_data":
276 mykey[key] = None
277 keytab = {}
278 _keys(self.dict,keytab)
279 return keytab.keys()
280
281 def __getitem__(self,item):
282 #print "Warning deprecated"
283 return self.getVar(item, False)
284
285 def __setitem__(self,var,data):
286 #print "Warning deprecated"
287 self.setVar(var,data)
288
289
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