summaryrefslogtreecommitdiffstats
path: root/bitbake/lib/bb/data_smart.py
blob: fbd4167fe4a5594d2bd80fd68c97e3411d5e1a4e (plain)
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
254
255
256
257
258
259
260
261
262
263
264
265
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake Smart Dictionary Implementation

Functions for interacting with the data structure used by the
BitBake build tools.

Copyright (C) 2003, 2004  Chris Larson
Copyright (C) 2004, 2005  Seb Frankengul
Copyright (C) 2005, 2006  Holger Hans Peter Freyther
Copyright (C) 2005        Uli Luckas
Copyright (C) 2005        ROAD GmbH

This program 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 of the License, or (at your option) any later
version.

This program 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
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place, Suite 330, Boston, MA 02111-1307 USA. 

Based on functions from the base bb module, Copyright 2003 Holger Schurig
"""

import copy, os, re, sys, time, types
from bb   import note, debug, error, fatal, utils, methodpool
from sets import Set

try:
    import cPickle as pickle
except ImportError:
    import pickle
    print "NOTE: Importing cPickle failed. Falling back to a very slow implementation."

__setvar_keyword__ = ["_append","_prepend"]
__setvar_regexp__ = re.compile('(?P<base>.*?)(?P<keyword>_append|_prepend)(_(?P<add>.*))?')
__expand_var_regexp__ = re.compile(r"\${[^{}]+}")
__expand_python_regexp__ = re.compile(r"\${@.+?}")


class DataSmart:
    def __init__(self):
        self.dict = {}

        # cookie monster tribute
        self._special_values = {}
        self._seen_overrides = {}

    def expand(self,s, varname):
        def var_sub(match):
            key = match.group()[2:-1]
            if varname and key:
                if varname == key:
                    raise Exception("variable %s references itself!" % varname)
            var = self.getVar(key, 1)
            if var is not None:
                return var
            else:
                return match.group()

        def python_sub(match):
            import bb
            code = match.group()[3:-1]
            locals()['d'] = self
            s = eval(code)
            if type(s) == types.IntType: s = str(s)
            return s

        if type(s) is not types.StringType: # sanity check
            return s

        while s.find('$') != -1:
            olds = s
            try:
                s = __expand_var_regexp__.sub(var_sub, s)
                s = __expand_python_regexp__.sub(python_sub, s)
                if s == olds: break
                if type(s) is not types.StringType: # sanity check
                    error('expansion of %s returned non-string %s' % (olds, s))
            except KeyboardInterrupt:
                raise
            except:
                note("%s:%s while evaluating:\n%s" % (sys.exc_info()[0], sys.exc_info()[1], s))
                raise
        return s

    def initVar(self, var):
        if not var in self.dict:
            self.dict[var] = {}

    def _findVar(self,var):
        _dest = self.dict

        while (_dest and var not in _dest):
            if not "_data" in _dest:
                _dest = None
                break
            _dest = _dest["_data"]

        if _dest and var in _dest:
            return _dest[var]
        return None

    def _makeShadowCopy(self, var):
        if var in self.dict:
            return

        local_var = self._findVar(var)

        if local_var:
            self.dict[var] = copy.copy(local_var)
        else:
            self.initVar(var)

    def setVar(self,var,value):
        match  = __setvar_regexp__.match(var)
        if match and match.group("keyword") in __setvar_keyword__:
            base = match.group('base')
            keyword = match.group("keyword")
            override = match.group('add')
            l = self.getVarFlag(base, keyword) or []
            l.append([value, override])
            self.setVarFlag(base, keyword, l)

            # pay the cookie monster
            try:
                self._special_values[keyword].add( base )
            except:
                self._special_values[keyword] = Set()
                self._special_values[keyword].add( base )

            # SRC_URI_append_simpad is both a flag and a override
            #if not override in self._seen_overrides:
            #    self._seen_overrides[override] = Set()
            #self._seen_overrides[override].add( base )
            return

        if not var in self.dict:
            self._makeShadowCopy(var)
        if self.getVarFlag(var, 'matchesenv'):
            self.delVarFlag(var, 'matchesenv')
            self.setVarFlag(var, 'export', 1)

        # more cookies for the cookie monster
        if '_' in var:
            override = var[var.rfind('_')+1:]
            if not override in self._seen_overrides:
                self._seen_overrides[override] = Set()
            self._seen_overrides[override].add( var )

        # setting var
        self.dict[var]["content"] = value

    def getVar(self,var,exp):
        value = self.getVarFlag(var,"content")

        if exp and value:
            return self.expand(value,var)
        return value

    def delVar(self,var):
        self.dict[var] = {}

    def setVarFlag(self,var,flag,flagvalue):
        if not var in self.dict:
            self._makeShadowCopy(var)
        self.dict[var][flag] = flagvalue

    def getVarFlag(self,var,flag):
        local_var = self._findVar(var)
        if local_var:
            if flag in local_var:
                return copy.copy(local_var[flag])
        return None

    def delVarFlag(self,var,flag):
        local_var = self._findVar(var)
        if not local_var:
            return
        if not var in self.dict:
            self._makeShadowCopy(var)

        if var in self.dict and flag in self.dict[var]:
            del self.dict[var][flag]

    def setVarFlags(self,var,flags):
        if not var in self.dict:
            self._makeShadowCopy(var)

        for i in flags.keys():
            if i == "content":
                continue
            self.dict[var][i] = flags[i]

    def getVarFlags(self,var):
        local_var = self._findVar(var)
        flags = {}

        if local_var:
            for i in self.dict[var].keys():
                if i == "content":
                    continue
                flags[i] = self.dict[var][i]

        if len(flags) == 0:
            return None
        return flags


    def delVarFlags(self,var):
        if not var in self.dict:
            self._makeShadowCopy(var)

        if var in self.dict:
            content = None

            # try to save the content
            if "content" in self.dict[var]:
                content  = self.dict[var]["content"]
                self.dict[var]            = {}
                self.dict[var]["content"] = content
            else:
                del self.dict[var]


    def createCopy(self):
        """
        Create a copy of self by setting _data to self
        """
        # we really want this to be a DataSmart...
        data = DataSmart()
        data.dict["_data"] = self.dict
        data._seen_overrides = copy.deepcopy(self._seen_overrides)
        data._special_values = copy.deepcopy(self._special_values)

        return data

    # Dictionary Methods
    def keys(self):
        def _keys(d, mykey):
            if "_data" in d:
                _keys(d["_data"],mykey)

            for key in d.keys():
                if key != "_data":
                    mykey[key] = None
        keytab = {}
        _keys(self.dict,keytab)
        return keytab.keys()

    def __getitem__(self,item):
        #print "Warning deprecated"
        return self.getVar(item, False)

    def __setitem__(self,var,data):
        #print "Warning deprecated"
        self.setVar(var,data)