aboutsummaryrefslogtreecommitdiffstats
path: root/lib/bb/cooker.py
blob: c39d522c477b35ae848b19b44f8c5354ada4a385 (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
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
#!/usr/bin/env python
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (C) 2003, 2004  Chris Larson
# Copyright (C) 2003, 2004  Phil Blundell
# Copyright (C) 2003 - 2005 Michael 'Mickey' Lauer
# Copyright (C) 2005        Holger Hans Peter Freyther
# Copyright (C) 2005        ROAD GmbH
# Copyright (C) 2006 - 2007 Richard Purdie
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

from __future__ import print_function
import sys, os, glob, os.path, re, time
import atexit
import itertools
import logging
import multiprocessing
import sre_constants
import threading
from cStringIO import StringIO
from contextlib import closing
from functools import wraps
from collections import defaultdict
import bb, bb.exceptions, bb.command
from bb import utils, data, parse, event, cache, providers, taskdata, runqueue
import Queue
import prserv.serv

logger      = logging.getLogger("BitBake")
collectlog  = logging.getLogger("BitBake.Collection")
buildlog    = logging.getLogger("BitBake.Build")
parselog    = logging.getLogger("BitBake.Parsing")
providerlog = logging.getLogger("BitBake.Provider")

class NoSpecificMatch(bb.BBHandledException):
    """
    Exception raised when no or multiple file matches are found
    """

class NothingToBuild(Exception):
    """
    Exception raised when there is nothing to build
    """

class CollectionError(bb.BBHandledException):
    """
    Exception raised when layer configuration is incorrect
    """

class state:
    initial, parsing, running, shutdown, stop = range(5)


class SkippedPackage:
    def __init__(self, info = None, reason = None):
        self.pn = None
        self.skipreason = None
        self.provides = None
        self.rprovides = None

        if info:
            self.pn = info.pn
            self.skipreason = info.skipreason
            self.provides = info.provides
            self.rprovides = info.rprovides
        elif reason:
            self.skipreason = reason

#============================================================================#
# BBCooker
#============================================================================#
class BBCooker:
    """
    Manages one bitbake build run
    """

    def __init__(self, configuration, server_registration_cb, savedenv={}):
        self.status = None
        self.appendlist = {}
        self.skiplist = {}

        self.server_registration_cb = server_registration_cb

        self.configuration = configuration

        # Keep a datastore of the initial environment variables and their
        # values from when BitBake was launched to enable child processes
        # to use environment variables which have been cleaned from the
        # BitBake processes env
        self.savedenv = bb.data.init()
        for k in savedenv:
            self.savedenv.setVar(k, savedenv[k])

        self.caches_array = []
        # Currently, only Image Creator hob ui needs extra cache.
        # So, we save Extra Cache class name and container file
        # information into a extraCaches field in hob UI.  
        # TODO: In future, bin/bitbake should pass information into cooker,
        # instead of getting information from configuration.ui. Also, some
        # UI start up issues need to be addressed at the same time.
        caches_name_array = ['bb.cache:CoreRecipeInfo']
        if configuration.ui:
            try:
                module = __import__('bb.ui', fromlist=[configuration.ui])
                name_array = (getattr(module, configuration.ui)).extraCaches
                for recipeInfoName in name_array:
                    caches_name_array.append(recipeInfoName)
            except ImportError as exc:
                # bb.ui.XXX is not defined and imported. It's an error!
                logger.critical("Unable to import '%s' interface from bb.ui: %s" % (configuration.ui, exc))
                sys.exit("FATAL: Failed to import '%s' interface." % configuration.ui)
            except AttributeError:
                # This is not an error. If the field is not defined in the ui,
                # this interface might need no extra cache fields, so
                # just skip this error!
                logger.debug(2, "UI '%s' does not require extra cache!" % (configuration.ui))

        # At least CoreRecipeInfo will be loaded, so caches_array will never be empty!
        # This is the entry point, no further check needed!
        for var in caches_name_array:
            try:
                module_name, cache_name = var.split(':')
                module = __import__(module_name, fromlist=(cache_name,))
                self.caches_array.append(getattr(module, cache_name)) 
            except ImportError as exc:
                logger.critical("Unable to import extra RecipeInfo '%s' from '%s': %s" % (cache_name, module_name, exc))
                sys.exit("FATAL: Failed to import extra cache class '%s'." % cache_name)

        self.configuration.data = None
        self.loadConfigurationData()

        # Take a lock so only one copy of bitbake can run against a given build
        # directory at a time
        lockfile = self.configuration.data.expand("${TOPDIR}/bitbake.lock")
        self.lock = bb.utils.lockfile(lockfile, False, False)
        if not self.lock:
            bb.fatal("Only one copy of bitbake should be run against a build directory")

        bbpkgs = self.configuration.data.getVar('BBPKGS', True)
        if bbpkgs and len(self.configuration.pkgs_to_build) == 0:
            self.configuration.pkgs_to_build.extend(bbpkgs.split())

        #
        # Special updated configuration we use for firing events
        #
        self.configuration.event_data = bb.data.createCopy(self.configuration.data)
        bb.data.update_data(self.configuration.event_data)
        bb.parse.init_parser(self.configuration.event_data)

        # TOSTOP must not be set or our children will hang when they output
        fd = sys.stdout.fileno()
        if os.isatty(fd):
            import termios
            tcattr = termios.tcgetattr(fd)
            if tcattr[3] & termios.TOSTOP:
                buildlog.info("The terminal had the TOSTOP bit set, clearing...")
                tcattr[3] = tcattr[3] & ~termios.TOSTOP
                termios.tcsetattr(fd, termios.TCSANOW, tcattr)

        self.command = bb.command.Command(self)
        self.state = state.initial

        self.parser = None

    def initConfigurationData(self):
        self.configuration.data = bb.data.init()

        if not self.server_registration_cb:
            self.configuration.data.setVar("BB_WORKERCONTEXT", "1")

        filtered_keys = bb.utils.approved_variables()
        bb.data.inheritFromOS(self.configuration.data, self.savedenv, filtered_keys)

    def loadConfigurationData(self):
        self.configuration.data = bb.data.init()

        if not self.server_registration_cb:
            self.configuration.data.setVar("BB_WORKERCONTEXT", "1")

        filtered_keys = bb.utils.approved_variables()
        bb.data.inheritFromOS(self.configuration.data, self.savedenv, filtered_keys)

        try:
            self.parseConfigurationFiles(self.configuration.prefile,
                                         self.configuration.postfile)
        except SyntaxError:
            sys.exit(1)
        except Exception:
            logger.exception("Error parsing configuration files")
            sys.exit(1)

        if not self.configuration.cmd:
            self.configuration.cmd = self.configuration.data.getVar("BB_DEFAULT_TASK", True) or "build"

    def parseConfiguration(self):

        # Set log file verbosity
        verboselogs = bb.utils.to_boolean(self.configuration.data.getVar("BB_VERBOSE_LOGS", "0"))
        if verboselogs:
            bb.msg.loggerVerboseLogs = True

        # Change nice level if we're asked to
        nice = self.configuration.data.getVar("BB_NICE_LEVEL", True)
        if nice:
            curnice = os.nice(0)
            nice = int(nice) - curnice
            buildlog.verbose("Renice to %s " % os.nice(nice))

        if self.status:
            del self.status
        self.status = bb.cache.CacheData(self.caches_array)

        self.handleCollections( self.configuration.data.getVar("BBFILE_COLLECTIONS", True) )

    def parseCommandLine(self):
        # Parse any commandline into actions
        self.commandlineAction = {'action':None, 'msg':None}
        if self.configuration.show_environment:
            if 'world' in self.configuration.pkgs_to_build:
                self.commandlineAction['msg'] = "'world' is not a valid target for --environment."
            elif 'universe' in self.configuration.pkgs_to_build:
                self.commandlineAction['msg'] = "'universe' is not a valid target for --environment."
            elif len(self.configuration.pkgs_to_build) > 1:
                self.commandlineAction['msg'] = "Only one target can be used with the --environment option."
            elif self.configuration.buildfile and len(self.configuration.pkgs_to_build) > 0:
                self.commandlineAction['msg'] = "No target should be used with the --environment and --buildfile options."
            elif len(self.configuration.pkgs_to_build) > 0:
                self.commandlineAction['action'] = ["showEnvironmentTarget", self.configuration.pkgs_to_build]
            else:
                self.commandlineAction['action'] = ["showEnvironment", self.configuration.buildfile]
        elif self.configuration.buildfile is not None:
            self.commandlineAction['action'] = ["buildFile", self.configuration.buildfile, self.configuration.cmd]
        elif self.configuration.revisions_changed:
            self.commandlineAction['action'] = ["compareRevisions"]
        elif self.configuration.show_versions:
            self.commandlineAction['action'] = ["showVersions"]
        elif self.configuration.parse_only:
            self.commandlineAction['action'] = ["parseFiles"]
        elif self.configuration.dot_graph:
            if self.configuration.pkgs_to_build:
                self.commandlineAction['action'] = ["generateDotGraph", self.configuration.pkgs_to_build, self.configuration.cmd]
            else:
                self.commandlineAction['msg'] = "Please specify a package name for dependency graph generation."
        else:
            if self.configuration.pkgs_to_build:
                self.commandlineAction['action'] = ["buildTargets", self.configuration.pkgs_to_build, self.configuration.cmd]
            else:
                #self.commandlineAction['msg'] = "Nothing to do.  Use 'bitbake world' to build everything, or run 'bitbake --help' for usage information."
                self.commandlineAction = None

    def runCommands(self, server, data, abort):
        """
        Run any queued asynchronous command
        This is done by the idle handler so it runs in true context rather than
        tied to any UI.
        """

        return self.command.runAsyncCommand()

    def showVersions(self):

        # Need files parsed
        self.updateCache()

        pkg_pn = self.status.pkg_pn
        (latest_versions, preferred_versions) = bb.providers.findProviders(self.configuration.data, self.status, pkg_pn)

        logger.plain("%-35s %25s %25s", "Recipe Name", "Latest Version", "Preferred Version")
        logger.plain("%-35s %25s %25s\n", "===========", "==============", "=================")

        for p in sorted(pkg_pn):
            pref = preferred_versions[p]
            latest = latest_versions[p]

            prefstr = pref[0][0] + ":" + pref[0][1] + '-' + pref[0][2]
            lateststr = latest[0][0] + ":" + latest[0][1] + "-" + latest[0][2]

            if pref == latest:
                prefstr = ""

            logger.plain("%-35s %25s %25s", p, lateststr, prefstr)

    def showEnvironment(self, buildfile = None, pkgs_to_build = []):
        """
        Show the outer or per-package environment
        """
        fn = None
        envdata = None

        if buildfile:
            # Parse the configuration here. We need to do it explicitly here since
            # this showEnvironment() code path doesn't use the cache
            self.parseConfiguration()

            fn, cls = bb.cache.Cache.virtualfn2realfn(buildfile)
            fn = self.matchFile(fn)
            fn = bb.cache.Cache.realfn2virtual(fn, cls)
        elif len(pkgs_to_build) == 1:
            self.updateCache()

            localdata = data.createCopy(self.configuration.data)
            bb.data.update_data(localdata)
            bb.data.expandKeys(localdata)

            taskdata = bb.taskdata.TaskData(self.configuration.abort)
            taskdata.add_provider(localdata, self.status, pkgs_to_build[0])
            taskdata.add_unresolved(localdata, self.status)

            targetid = taskdata.getbuild_id(pkgs_to_build[0])
            fnid = taskdata.build_targets[targetid][0]
            fn = taskdata.fn_index[fnid]
        else:
            envdata = self.configuration.data

        if fn:
            try:
                envdata = bb.cache.Cache.loadDataFull(fn, self.get_file_appends(fn), self.configuration.data)
            except Exception as e:
                parselog.exception("Unable to read %s", fn)
                raise

        # emit variables and shell functions
        data.update_data(envdata)
        with closing(StringIO()) as env:
            data.emit_env(env, envdata, True)
            logger.plain(env.getvalue())

        # emit the metadata which isnt valid shell
        data.expandKeys(envdata)
        for e in envdata.keys():
            if data.getVarFlag( e, 'python', envdata ):
                logger.plain("\npython %s () {\n%s}\n", e, data.getVar(e, envdata, 1))

    def prepareTreeData(self, pkgs_to_build, task):
        """
        Prepare a runqueue and taskdata object for iteration over pkgs_to_build
        """
        bb.event.fire(bb.event.TreeDataPreparationStarted(), self.configuration.data)
        # Need files parsed
        self.updateCache()
        # If we are told to do the None task then query the default task
        if (task == None):
            task = self.configuration.cmd

        pkgs_to_build = self.checkPackages(pkgs_to_build)

        localdata = data.createCopy(self.configuration.data)
        bb.data.update_data(localdata)
        bb.data.expandKeys(localdata)
        # We set abort to False here to prevent unbuildable targets raising
        # an exception when we're just generating data
        taskdata = bb.taskdata.TaskData(False, skiplist=self.skiplist)

        runlist = []
        current = 0
        for k in pkgs_to_build:
            taskdata.add_provider(localdata, self.status, k)
            runlist.append([k, "do_%s" % task])
            current += 1
            bb.event.fire(bb.event.TreeDataPreparationProgress(current, len(pkgs_to_build)), self.configuration.data)
        taskdata.add_unresolved(localdata, self.status)
        bb.event.fire(bb.event.TreeDataPreparationCompleted(len(pkgs_to_build)), self.configuration.data)
        return runlist, taskdata

    def generateTaskDepTreeData(self, pkgs_to_build, task):
        """
        Create a dependency graph of pkgs_to_build including reverse dependency
        information.
        """
        runlist, taskdata = self.prepareTreeData(pkgs_to_build, task)
        rq = bb.runqueue.RunQueue(self, self.configuration.data, self.status, taskdata, runlist)
        rq.rqdata.prepare()

        seen_fnids = []
        depend_tree = {}
        depend_tree["depends"] = {}
        depend_tree["tdepends"] = {}
        depend_tree["pn"] = {}
        depend_tree["rdepends-pn"] = {}
        depend_tree["packages"] = {}
        depend_tree["rdepends-pkg"] = {}
        depend_tree["rrecs-pkg"] = {}

        for task in xrange(len(rq.rqdata.runq_fnid)):
            taskname = rq.rqdata.runq_task[task]
            fnid = rq.rqdata.runq_fnid[task]
            fn = taskdata.fn_index[fnid]
            pn = self.status.pkg_fn[fn]
            version  = "%s:%s-%s" % self.status.pkg_pepvpr[fn]
            if pn not in depend_tree["pn"]:
                depend_tree["pn"][pn] = {}
                depend_tree["pn"][pn]["filename"] = fn
                depend_tree["pn"][pn]["version"] = version
            for dep in rq.rqdata.runq_depends[task]:
                depfn = taskdata.fn_index[rq.rqdata.runq_fnid[dep]]
                deppn = self.status.pkg_fn[depfn]
                dotname = "%s.%s" % (pn, rq.rqdata.runq_task[task])
                if not dotname in depend_tree["tdepends"]:
                    depend_tree["tdepends"][dotname] = []
                depend_tree["tdepends"][dotname].append("%s.%s" % (deppn, rq.rqdata.runq_task[dep]))
            if fnid not in seen_fnids:
                seen_fnids.append(fnid)
                packages = []

                depend_tree["depends"][pn] = []
                for dep in taskdata.depids[fnid]:
                    depend_tree["depends"][pn].append(taskdata.build_names_index[dep])

                depend_tree["rdepends-pn"][pn] = []
                for rdep in taskdata.rdepids[fnid]:
                    depend_tree["rdepends-pn"][pn].append(taskdata.run_names_index[rdep])

                rdepends = self.status.rundeps[fn]
                for package in rdepends:
                    depend_tree["rdepends-pkg"][package] = []
                    for rdepend in rdepends[package]:
                        depend_tree["rdepends-pkg"][package].append(rdepend)
                    packages.append(package)

                rrecs = self.status.runrecs[fn]
                for package in rrecs:
                    depend_tree["rrecs-pkg"][package] = []
                    for rdepend in rrecs[package]:
                        depend_tree["rrecs-pkg"][package].append(rdepend)
                    if not package in packages:
                        packages.append(package)

                for package in packages:
                    if package not in depend_tree["packages"]:
                        depend_tree["packages"][package] = {}
                        depend_tree["packages"][package]["pn"] = pn
                        depend_tree["packages"][package]["filename"] = fn
                        depend_tree["packages"][package]["version"] = version

        return depend_tree

    def generatePkgDepTreeData(self, pkgs_to_build, task):
        """
        Create a dependency tree of pkgs_to_build, returning the data.
        """
        _, taskdata = self.prepareTreeData(pkgs_to_build, task)
        tasks_fnid = []
        if len(taskdata.tasks_name) != 0:
            for task in xrange(len(taskdata.tasks_name)):
                tasks_fnid.append(taskdata.tasks_fnid[task])

        seen_fnids = []
        depend_tree = {}
        depend_tree["depends"] = {}
        depend_tree["pn"] = {}
        depend_tree["rdepends-pn"] = {}
        depend_tree["rdepends-pkg"] = {}
        depend_tree["rrecs-pkg"] = {}

        for task in xrange(len(tasks_fnid)):
            fnid = tasks_fnid[task]
            fn = taskdata.fn_index[fnid]
            pn = self.status.pkg_fn[fn]
            version  = "%s:%s-%s" % self.status.pkg_pepvpr[fn]
            summary = self.status.summary[fn]
            lic = self.status.license[fn]
            section = self.status.section[fn]
            description = self.status.description[fn]
            rdepends = self.status.rundeps[fn]
            rrecs = self.status.runrecs[fn]
            inherits = self.status.inherits.get(fn, None)
            if pn not in depend_tree["pn"]:
                depend_tree["pn"][pn] = {}
                depend_tree["pn"][pn]["filename"] = fn
                depend_tree["pn"][pn]["version"] = version
                depend_tree["pn"][pn]["summary"] = summary
                depend_tree["pn"][pn]["license"] = lic
                depend_tree["pn"][pn]["section"] = section
                depend_tree["pn"][pn]["description"] = description
                depend_tree["pn"][pn]["inherits"] = inherits

            if fnid not in seen_fnids:
                seen_fnids.append(fnid)

                depend_tree["depends"][pn] = []
                for dep in taskdata.depids[fnid]:
                    item = taskdata.build_names_index[dep]
                    pn_provider = ""
                    targetid = taskdata.getbuild_id(item)
                    if targetid in taskdata.build_targets and taskdata.build_targets[targetid]:
                        id = taskdata.build_targets[targetid][0]
                        fn_provider = taskdata.fn_index[id]
                        pn_provider = self.status.pkg_fn[fn_provider]
                    else:
                        pn_provider = item
                    depend_tree["depends"][pn].append(pn_provider)

                depend_tree["rdepends-pn"][pn] = []
                for rdep in taskdata.rdepids[fnid]:
                    item = taskdata.run_names_index[rdep]
                    pn_rprovider = ""
                    targetid = taskdata.getrun_id(item)
                    if targetid in taskdata.run_targets and taskdata.run_targets[targetid]:
                        id = taskdata.run_targets[targetid][0]
                        fn_rprovider = taskdata.fn_index[id]
                        pn_rprovider = self.status.pkg_fn[fn_rprovider]
                    else:
                        pn_rprovider = item
                    depend_tree["rdepends-pn"][pn].append(pn_rprovider)

                depend_tree["rdepends-pkg"].update(rdepends)
                depend_tree["rrecs-pkg"].update(rrecs)

        return depend_tree

    def generateDepTreeEvent(self, pkgs_to_build, task):
        """
        Create a task dependency graph of pkgs_to_build.
        Generate an event with the result
        """
        depgraph = self.generateTaskDepTreeData(pkgs_to_build, task)
        bb.event.fire(bb.event.DepTreeGenerated(depgraph), self.configuration.data)

    def generateDotGraphFiles(self, pkgs_to_build, task):
        """
        Create a task dependency graph of pkgs_to_build.
        Save the result to a set of .dot files.
        """

        depgraph = self.generateTaskDepTreeData(pkgs_to_build, task)

        # Prints a flattened form of package-depends below where subpackages of a package are merged into the main pn
        depends_file = file('pn-depends.dot', 'w' )
        buildlist_file = file('pn-buildlist', 'w' )
        print("digraph depends {", file=depends_file)
        for pn in depgraph["pn"]:
            fn = depgraph["pn"][pn]["filename"]
            version = depgraph["pn"][pn]["version"]
            print('"%s" [label="%s %s\\n%s"]' % (pn, pn, version, fn), file=depends_file)
            print("%s" % pn, file=buildlist_file)
        buildlist_file.close()
        logger.info("PN build list saved to 'pn-buildlist'")
        for pn in depgraph["depends"]:
            for depend in depgraph["depends"][pn]:
                print('"%s" -> "%s"' % (pn, depend), file=depends_file)
        for pn in depgraph["rdepends-pn"]:
            for rdepend in depgraph["rdepends-pn"][pn]:
                print('"%s" -> "%s" [style=dashed]' % (pn, rdepend), file=depends_file)
        print("}", file=depends_file)
        logger.info("PN dependencies saved to 'pn-depends.dot'")

        depends_file = file('package-depends.dot', 'w' )
        print("digraph depends {", file=depends_file)
        for package in depgraph["packages"]:
            pn = depgraph["packages"][package]["pn"]
            fn = depgraph["packages"][package]["filename"]
            version = depgraph["packages"][package]["version"]
            if package == pn:
                print('"%s" [label="%s %s\\n%s"]' % (pn, pn, version, fn), file=depends_file)
            else:
                print('"%s" [label="%s(%s) %s\\n%s"]' % (package, package, pn, version, fn), file=depends_file)
            for depend in depgraph["depends"][pn]:
                print('"%s" -> "%s"' % (package, depend), file=depends_file)
        for package in depgraph["rdepends-pkg"]:
            for rdepend in depgraph["rdepends-pkg"][package]:
                print('"%s" -> "%s" [style=dashed]' % (package, rdepend), file=depends_file)
        for package in depgraph["rrecs-pkg"]:
            for rdepend in depgraph["rrecs-pkg"][package]:
                print('"%s" -> "%s" [style=dashed]' % (package, rdepend), file=depends_file)
        print("}", file=depends_file)
        logger.info("Package dependencies saved to 'package-depends.dot'")

        tdepends_file = file('task-depends.dot', 'w' )
        print("digraph depends {", file=tdepends_file)
        for task in depgraph["tdepends"]:
            (pn, taskname) = task.rsplit(".", 1)
            fn = depgraph["pn"][pn]["filename"]
            version = depgraph["pn"][pn]["version"]
            print('"%s.%s" [label="%s %s\\n%s\\n%s"]' % (pn, taskname, pn, taskname, version, fn), file=tdepends_file)
            for dep in depgraph["tdepends"][task]:
                print('"%s" -> "%s"' % (task, dep), file=tdepends_file)
        print("}", file=tdepends_file)
        logger.info("Task dependencies saved to 'task-depends.dot'")

    def calc_bbfile_priority( self, filename, matched = None ):
        for _, _, regex, pri in self.status.bbfile_config_priorities:
            if regex.match(filename):
                if matched != None:
                    if not regex in matched:
                        matched.add(regex)
                return pri
        return 0

    def show_appends_with_no_recipes( self ):
        recipes = set(os.path.basename(f)
                      for f in self.status.pkg_fn.iterkeys())
        recipes |= set(os.path.basename(f)
                      for f in self.skiplist.iterkeys())
        appended_recipes = self.appendlist.iterkeys()
        appends_without_recipes = [self.appendlist[recipe]
                                   for recipe in appended_recipes
                                   if recipe not in recipes]
        if appends_without_recipes:
            appendlines = ('  %s' % append
                           for appends in appends_without_recipes
                           for append in appends)
            msg = 'No recipes available for:\n%s' % '\n'.join(appendlines)
            warn_only = data.getVar("BB_DANGLINGAPPENDS_WARNONLY", \
                 self.configuration.data, False) or "no"
            if warn_only.lower() in ("1", "yes", "true"):
                bb.warn(msg)
            else:
                bb.fatal(msg)

    def buildDepgraph( self ):
        all_depends = self.status.all_depends
        pn_provides = self.status.pn_provides

        localdata = data.createCopy(self.configuration.data)
        bb.data.update_data(localdata)
        bb.data.expandKeys(localdata)

        # Handle PREFERRED_PROVIDERS
        for p in (localdata.getVar('PREFERRED_PROVIDERS', True) or "").split():
            try:
                (providee, provider) = p.split(':')
            except:
                providerlog.critical("Malformed option in PREFERRED_PROVIDERS variable: %s" % p)
                continue
            if providee in self.status.preferred and self.status.preferred[providee] != provider:
                providerlog.error("conflicting preferences for %s: both %s and %s specified", providee, provider, self.status.preferred[providee])
            self.status.preferred[providee] = provider

        # Calculate priorities for each file
        matched = set()
        for p in self.status.pkg_fn:
            realfn, cls = bb.cache.Cache.virtualfn2realfn(p)
            self.status.bbfile_priority[p] = self.calc_bbfile_priority(realfn, matched)
 
        # Don't show the warning if the BBFILE_PATTERN did match .bbappend files
        unmatched = set()
        for _, _, regex, pri in self.status.bbfile_config_priorities:        
            if not regex in matched:
                unmatched.add(regex)

        def findmatch(regex):
            for bbfile in self.appendlist:
                for append in self.appendlist[bbfile]:
                    if regex.match(append):
                        return True
            return False

        for unmatch in unmatched.copy():
            if findmatch(unmatch):
                unmatched.remove(unmatch)

        for collection, pattern, regex, _ in self.status.bbfile_config_priorities:
            if regex in unmatched:
                collectlog.warn("No bb files matched BBFILE_PATTERN_%s '%s'" % (collection, pattern))

    def findCoreBaseFiles(self, subdir, configfile):
        corebase = self.configuration.data.getVar('COREBASE', True) or ""
        paths = []
        for root, dirs, files in os.walk(corebase + '/' + subdir):
            for d in dirs:
                configfilepath = os.path.join(root, d, configfile)
                if os.path.exists(configfilepath):
                    paths.append(os.path.join(root, d))

        if paths:
            bb.event.fire(bb.event.CoreBaseFilesFound(paths), self.configuration.data)

    def findConfigFilePath(self, configfile):
        """
        Find the location on disk of configfile and if it exists and was parsed by BitBake
        emit the ConfigFilePathFound event with the path to the file.
        """
        path = self._findConfigFile(configfile)
        if not path:
            return

        # Generate a list of parsed configuration files by searching the files
        # listed in the __depends and __base_depends variables with a .conf suffix.
        conffiles = []
        dep_files = self.configuration.data.getVar('__depends') or set()
        dep_files.union(self.configuration.data.getVar('__base_depends') or set())

        for f in dep_files:
            if f[0].endswith(".conf"):
                conffiles.append(f[0])

        _, conf, conffile = path.rpartition("conf/")
        match = os.path.join(conf, conffile)
        # Try and find matches for conf/conffilename.conf as we don't always
        # have the full path to the file.
        for cfg in conffiles:
            if cfg.endswith(match):
                bb.event.fire(bb.event.ConfigFilePathFound(path),
                              self.configuration.data)
                break

    def findFilesMatchingInDir(self, filepattern, directory):
        """
        Searches for files matching the regex 'pattern' which are children of
        'directory' in each BBPATH. i.e. to find all rootfs package classes available
        to BitBake one could call findFilesMatchingInDir(self, 'rootfs_', 'classes')
        or to find all machine configuration files one could call:
        findFilesMatchingInDir(self, 'conf/machines', 'conf')
        """
        import re

        matches = []
        p = re.compile(re.escape(filepattern))
        bbpaths = self.configuration.data.getVar('BBPATH', True).split(':')
        for path in bbpaths:
            dirpath = os.path.join(path, directory)
            if os.path.exists(dirpath):
                for root, dirs, files in os.walk(dirpath):
                    for f in files:
                        if p.search(f):
                            matches.append(f)

        if matches:
            bb.event.fire(bb.event.FilesMatchingFound(filepattern, matches), self.configuration.data)

    def findConfigFiles(self, varname):
        """
        Find config files which are appropriate values for varname.
        i.e. MACHINE, DISTRO
        """
        possible = []
        var = varname.lower()

        data = self.configuration.data
        # iterate configs
        bbpaths = data.getVar('BBPATH', True).split(':')
        for path in bbpaths:
            confpath = os.path.join(path, "conf", var)
            if os.path.exists(confpath):
                for root, dirs, files in os.walk(confpath):
                    # get all child files, these are appropriate values
                    for f in files:
                        val, sep, end = f.rpartition('.')
                        if end == 'conf':
                            possible.append(val)

        if possible:
            bb.event.fire(bb.event.ConfigFilesFound(var, possible), self.configuration.data)

    def findInheritsClass(self, klass):
        """
        Find all recipes which inherit the specified class
        """
        pkg_list = []

        for pfn in self.status.pkg_fn:
            inherits = self.status.inherits.get(pfn, None)
            if inherits and inherits.count(klass) > 0:
                pkg_list.append(self.status.pkg_fn[pfn])

        return pkg_list

    def generateTargetsTree(self, klass=None, pkgs=[]):
        """
        Generate a dependency tree of buildable targets
        Generate an event with the result
        """
        # if the caller hasn't specified a pkgs list default to universe
        if not len(pkgs):
            pkgs = ['universe']
        # if inherited_class passed ensure all recipes which inherit the
        # specified class are included in pkgs
        if klass:
            extra_pkgs = self.findInheritsClass(klass)
            pkgs = pkgs + extra_pkgs

        # generate a dependency tree for all our packages
        tree = self.generatePkgDepTreeData(pkgs, 'build')
        bb.event.fire(bb.event.TargetsTreeGenerated(tree), self.configuration.data)

    def buildWorldTargetList(self):
        """
         Build package list for "bitbake world"
        """
        all_depends = self.status.all_depends
        pn_provides = self.status.pn_provides
        parselog.debug(1, "collating packages for \"world\"")
        for f in self.status.possible_world:
            terminal = True
            pn = self.status.pkg_fn[f]

            for p in pn_provides[pn]:
                if p.startswith('virtual/'):
                    parselog.debug(2, "World build skipping %s due to %s provider starting with virtual/", f, p)
                    terminal = False
                    break
                for pf in self.status.providers[p]:
                    if self.status.pkg_fn[pf] != pn:
                        parselog.debug(2, "World build skipping %s due to both us and %s providing %s", f, pf, p)
                        terminal = False
                        break
            if terminal:
                self.status.world_target.add(pn)

    def interactiveMode( self ):
        """Drop off into a shell"""
        try:
            from bb import shell
        except ImportError:
            parselog.exception("Interactive mode not available")
            sys.exit(1)
        else:
            shell.start( self )

    def _findConfigFile(self, configfile):
        path = os.getcwd()
        while path != "/":
            confpath = os.path.join(path, "conf", configfile)
            if os.path.exists(confpath):
                return confpath

            path, _ = os.path.split(path)
        return None

    def _findLayerConf(self):
        return self._findConfigFile("bblayers.conf")

    def parseConfigurationFiles(self, prefiles, postfiles):
        data = self.configuration.data
        bb.parse.init_parser(data)

        # Parse files for loading *before* bitbake.conf and any includes
        for f in prefiles:
            data = _parse(f, data)

        layerconf = self._findLayerConf()
        if layerconf:
            parselog.debug(2, "Found bblayers.conf (%s)", layerconf)
            data = _parse(layerconf, data)

            layers = (data.getVar('BBLAYERS', True) or "").split()

            data = bb.data.createCopy(data)
            for layer in layers:
                parselog.debug(2, "Adding layer %s", layer)
                data.setVar('LAYERDIR', layer)
                data = _parse(os.path.join(layer, "conf", "layer.conf"), data)
                data.expandVarref('LAYERDIR')

            data.delVar('LAYERDIR')

        if not data.getVar("BBPATH", True):
            raise SystemExit("The BBPATH variable is not set")

        data = _parse(os.path.join("conf", "bitbake.conf"), data)

        # Parse files for loading *after* bitbake.conf and any includes
        for p in postfiles:
            data = _parse(p, data)

        # Handle any INHERITs and inherit the base class
        bbclasses  = ["base"] + (data.getVar('INHERIT', True) or "").split()
        for bbclass in bbclasses:
            data = _inherit(bbclass, data)

        # Nomally we only register event handlers at the end of parsing .bb files
        # We register any handlers we've found so far here...
        for var in data.getVar('__BBHANDLERS') or []:
            bb.event.register(var, data.getVar(var))

        if data.getVar("BB_WORKERCONTEXT", False) is None:
            bb.fetch.fetcher_init(data)
        bb.codeparser.parser_cache_init(data)
        bb.event.fire(bb.event.ConfigParsed(), data)
        bb.parse.init_parser(data)
        data.setVar('BBINCLUDED',bb.parse.get_file_depends(data))
        self.configuration.data = data
        self.configuration.data_hash = data.get_hash()

    def handleCollections( self, collections ):
        """Handle collections"""
        errors = False
        self.status.bbfile_config_priorities = []
        if collections:
            collection_priorities = {}
            collection_depends = {}
            collection_list = collections.split()
            min_prio = 0
            for c in collection_list:
                # Get collection priority if defined explicitly
                priority = self.configuration.data.getVar("BBFILE_PRIORITY_%s" % c, True)
                if priority:
                    try:
                        prio = int(priority)
                    except ValueError:
                        parselog.error("invalid value for BBFILE_PRIORITY_%s: \"%s\"", c, priority)
                        errors = True
                    if min_prio == 0 or prio < min_prio:
                        min_prio = prio
                    collection_priorities[c] = prio
                else:
                    collection_priorities[c] = None

                # Check dependencies and store information for priority calculation
                deps = self.configuration.data.getVar("LAYERDEPENDS_%s" % c, True)
                if deps:
                    depnamelist = []
                    deplist = deps.split()
                    for dep in deplist:
                        depsplit = dep.split(':')
                        if len(depsplit) > 1:
                            try:
                                depver = int(depsplit[1])
                            except ValueError:
                                parselog.error("invalid version value in LAYERDEPENDS_%s: \"%s\"", c, dep)
                                errors = True
                                continue
                        else:
                            depver = None
                        dep = depsplit[0]
                        depnamelist.append(dep)

                        if dep in collection_list:
                            if depver:
                                layerver = self.configuration.data.getVar("LAYERVERSION_%s" % dep, True)
                                if layerver:
                                    try:
                                        lver = int(layerver)
                                    except ValueError:
                                        parselog.error("invalid value for LAYERVERSION_%s: \"%s\"", c, layerver)
                                        errors = True
                                        continue
                                    if lver <> depver:
                                        parselog.error("Layer '%s' depends on version %d of layer '%s', but version %d is enabled in your configuration", c, depver, dep, lver)
                                        errors = True
                                else:
                                    parselog.error("Layer '%s' depends on version %d of layer '%s', which exists in your configuration but does not specify a version", c, depver, dep)
                                    errors = True
                        else:
                            parselog.error("Layer '%s' depends on layer '%s', but this layer is not enabled in your configuration", c, dep)
                            errors = True
                    collection_depends[c] = depnamelist
                else:
                    collection_depends[c] = []

            # Recursively work out collection priorities based on dependencies
            def calc_layer_priority(collection):
                if not collection_priorities[collection]:
                    max_depprio = min_prio
                    for dep in collection_depends[collection]:
                        calc_layer_priority(dep)
                        depprio = collection_priorities[dep]
                        if depprio > max_depprio:
                            max_depprio = depprio
                    max_depprio += 1
                    parselog.debug(1, "Calculated priority of layer %s as %d", collection, max_depprio)
                    collection_priorities[collection] = max_depprio

            # Calculate all layer priorities using calc_layer_priority and store in bbfile_config_priorities
            for c in collection_list:
                calc_layer_priority(c)
                regex = self.configuration.data.getVar("BBFILE_PATTERN_%s" % c, True)
                if regex == None:
                    parselog.error("BBFILE_PATTERN_%s not defined" % c)
                    errors = True
                    continue
                try:
                    cre = re.compile(regex)
                except re.error:
                    parselog.error("BBFILE_PATTERN_%s \"%s\" is not a valid regular expression", c, regex)
                    errors = True
                    continue
                self.status.bbfile_config_priorities.append((c, regex, cre, collection_priorities[c]))
        if errors:
            # We've already printed the actual error(s)
            raise CollectionError("Errors during parsing layer configuration")

    def buildSetVars(self):
        """
        Setup any variables needed before starting a build
        """
        if not self.configuration.data.getVar("BUILDNAME"):
            self.configuration.data.setVar("BUILDNAME", time.strftime('%Y%m%d%H%M'))
        self.configuration.data.setVar("BUILDSTART", time.strftime('%m/%d/%Y %H:%M:%S', time.gmtime()))

    def matchFiles(self, bf):
        """
        Find the .bb files which match the expression in 'buildfile'.
        """
        if bf.startswith("/") or bf.startswith("../"):
            bf = os.path.abspath(bf)
        filelist, masked = self.collect_bbfiles()
        try:
            os.stat(bf)
            bf = os.path.abspath(bf)
            return [bf]
        except OSError:
            regexp = re.compile(bf)
            matches = []
            for f in filelist:
                if regexp.search(f) and os.path.isfile(f):
                    matches.append(f)
            return matches

    def matchFile(self, buildfile):
        """
        Find the .bb file which matches the expression in 'buildfile'.
        Raise an error if multiple files
        """
        matches = self.matchFiles(buildfile)
        if len(matches) != 1:
            if matches:
                msg = "Unable to match '%s' to a specific recipe file - %s matches found:" % (buildfile, len(matches))
                if matches:
                    for f in matches:
                        msg += "\n    %s" % f
                parselog.error(msg)
            else:
                parselog.error("Unable to find any recipe file matching '%s'" % buildfile)
            raise NoSpecificMatch
        return matches[0]

    def buildFile(self, buildfile, task):
        """
        Build the file matching regexp buildfile
        """

        # Too many people use -b because they think it's how you normally
        # specify a target to be built, so show a warning
        bb.warn("Buildfile specified, dependencies will not be handled. If this is not what you want, do not use -b / --buildfile.")

        # Parse the configuration here. We need to do it explicitly here since
        # buildFile() doesn't use the cache
        self.parseConfiguration()

        # If we are told to do the None task then query the default task
        if (task == None):
            task = self.configuration.cmd

        fn, cls = bb.cache.Cache.virtualfn2realfn(buildfile)
        fn = self.matchFile(fn)

        self.buildSetVars()

        self.status = bb.cache.CacheData(self.caches_array)
        infos = bb.cache.Cache.parse(fn, self.get_file_appends(fn), \
                                     self.configuration.data,
                                     self.caches_array)
        infos = dict(infos)

        fn = bb.cache.Cache.realfn2virtual(fn, cls)
        try:
            info_array = infos[fn]
        except KeyError:
            bb.fatal("%s does not exist" % fn)

        if info_array[0].skipped:
            bb.fatal("%s was skipped: %s" % (fn, info_array[0].skipreason))

        self.status.add_from_recipeinfo(fn, info_array)

        # Tweak some variables
        item = info_array[0].pn
        self.status.ignored_dependencies = set()
        self.status.bbfile_priority[fn] = 1

        # Remove external dependencies
        self.status.task_deps[fn]['depends'] = {}
        self.status.deps[fn] = []
        self.status.rundeps[fn] = []
        self.status.runrecs[fn] = []

        # Invalidate task for target if force mode active
        if self.configuration.force:
            logger.verbose("Invalidate task %s, %s", task, fn)
            bb.parse.siggen.invalidate_task('do_%s' % task, self.status, fn)

        # Setup taskdata structure
        taskdata = bb.taskdata.TaskData(self.configuration.abort)
        taskdata.add_provider(self.configuration.data, self.status, item)

        buildname = self.configuration.data.getVar("BUILDNAME")
        bb.event.fire(bb.event.BuildStarted(buildname, [item]), self.configuration.event_data)

        # Execute the runqueue
        runlist = [[item, "do_%s" % task]]

        rq = bb.runqueue.RunQueue(self, self.configuration.data, self.status, taskdata, runlist)

        def buildFileIdle(server, rq, abort):

            if abort or self.state == state.stop:
                rq.finish_runqueue(True)
            elif self.state == state.shutdown:
                rq.finish_runqueue(False)
            failures = 0
            try:
                retval = rq.execute_runqueue()
            except runqueue.TaskFailure as exc:
                failures += len(exc.args)
                retval = False
            except SystemExit as exc:
                self.command.finishAsyncCommand()
                return False

            if not retval:
                bb.event.fire(bb.event.BuildCompleted(len(rq.rqdata.runq_fnid), buildname, item, failures), self.configuration.event_data)
                self.command.finishAsyncCommand()
                return False
            if retval is True:
                return True
            return retval

        self.server_registration_cb(buildFileIdle, rq)

    def buildTargets(self, targets, task):
        """
        Attempt to build the targets specified
        """

        # Need files parsed
        self.updateCache()

        # If we are told to do the NULL task then query the default task
        if (task == None):
            task = self.configuration.cmd

        universe = ('universe' in targets)
        targets = self.checkPackages(targets)

        def buildTargetsIdle(server, rq, abort):
            if abort or self.state == state.stop:
                rq.finish_runqueue(True)
            elif self.state == state.shutdown:
                rq.finish_runqueue(False)
            failures = 0
            try:
                retval = rq.execute_runqueue()
            except runqueue.TaskFailure as exc:
                failures += len(exc.args)
                retval = False
            except SystemExit as exc:
                self.command.finishAsyncCommand()
                return False

            if not retval:
                bb.event.fire(bb.event.BuildCompleted(len(rq.rqdata.runq_fnid), buildname, targets, failures), self.configuration.data)
                self.command.finishAsyncCommand()
                return False
            if retval is True:
                return True
            return retval

        self.buildSetVars()

        buildname = self.configuration.data.getVar("BUILDNAME")
        bb.event.fire(bb.event.BuildStarted(buildname, targets), self.configuration.data)

        localdata = data.createCopy(self.configuration.data)
        bb.data.update_data(localdata)
        bb.data.expandKeys(localdata)

        taskdata = bb.taskdata.TaskData(self.configuration.abort, skiplist=self.skiplist)

        runlist = []
        for k in targets:
            taskdata.add_provider(localdata, self.status, k)
            runlist.append([k, "do_%s" % task])
        taskdata.add_unresolved(localdata, self.status)

        rq = bb.runqueue.RunQueue(self, self.configuration.data, self.status, taskdata, runlist)
        if universe:
            rq.rqdata.warn_multi_bb = True

        self.server_registration_cb(buildTargetsIdle, rq)

    def updateCache(self):
        if self.state == state.running:
            return

        if self.state in (state.shutdown, state.stop):
            self.parser.shutdown(clean=False, force = True)
            sys.exit(1)

        if self.state != state.parsing:
            self.parseConfiguration ()

            ignore = self.configuration.data.getVar("ASSUME_PROVIDED", True) or ""
            self.status.ignored_dependencies = set(ignore.split())

            for dep in self.configuration.extra_assume_provided:
                self.status.ignored_dependencies.add(dep)

            (filelist, masked) = self.collect_bbfiles()
            self.configuration.data.renameVar("__depends", "__base_depends")

            self.parser = CookerParser(self, filelist, masked)
            self.state = state.parsing

        if not self.parser.parse_next():
            collectlog.debug(1, "parsing complete")
            if self.parser.error:
                sys.exit(1)
            self.show_appends_with_no_recipes()
            self.buildDepgraph()
            self.state = state.running
            return None

        return True

    def checkPackages(self, pkgs_to_build):

        if len(pkgs_to_build) == 0:
            raise NothingToBuild

        if 'world' in pkgs_to_build:
            self.buildWorldTargetList()
            pkgs_to_build.remove('world')
            for t in self.status.world_target:
                pkgs_to_build.append(t)

        if 'universe' in pkgs_to_build:
            parselog.warn("The \"universe\" target is only intended for testing and may produce errors.")
            parselog.debug(1, "collating packages for \"universe\"")
            pkgs_to_build.remove('universe')
            for t in self.status.universe_target:
                pkgs_to_build.append(t)

        return pkgs_to_build

    def get_bbfiles( self, path = os.getcwd() ):
        """Get list of default .bb files by reading out the current directory"""
        contents = os.listdir(path)
        bbfiles = []
        for f in contents:
            (root, ext) = os.path.splitext(f)
            if ext == ".bb":
                bbfiles.append(os.path.abspath(os.path.join(os.getcwd(), f)))
        return bbfiles

    def find_bbfiles( self, path ):
        """Find all the .bb and .bbappend files in a directory"""
        from os.path import join

        found = []
        for dir, dirs, files in os.walk(path):
            for ignored in ('SCCS', 'CVS', '.svn'):
                if ignored in dirs:
                    dirs.remove(ignored)
            found += [join(dir, f) for f in files if (f.endswith('.bb') or f.endswith('.bbappend'))]

        return found

    def collect_bbfiles( self ):
        """Collect all available .bb build files"""
        parsed, cached, skipped, masked = 0, 0, 0, 0

        collectlog.debug(1, "collecting .bb files")

        files = (data.getVar( "BBFILES", self.configuration.data, True) or "").split()
        data.setVar("BBFILES", " ".join(files), self.configuration.data)

        # Sort files by priority
        files.sort( key=lambda fileitem: self.calc_bbfile_priority(fileitem) )

        if not len(files):
            files = self.get_bbfiles()

        if not len(files):
            collectlog.error("no recipe files to build, check your BBPATH and BBFILES?")
            bb.event.fire(CookerExit(), self.configuration.event_data)

        # Can't use set here as order is important
        newfiles = []
        for f in files:
            if os.path.isdir(f):
                dirfiles = self.find_bbfiles(f)
                for g in dirfiles:
                    if g not in newfiles:
                        newfiles.append(g)
            else:
                globbed = glob.glob(f)
                if not globbed and os.path.exists(f):
                    globbed = [f]
                for g in globbed:
                    if g not in newfiles:
                        newfiles.append(g)

        bbmask = self.configuration.data.getVar('BBMASK', True)

        if bbmask:
            try:
                bbmask_compiled = re.compile(bbmask)
            except sre_constants.error:
                collectlog.critical("BBMASK is not a valid regular expression, ignoring.")
                return list(newfiles), 0

        bbfiles = []
        bbappend = []
        for f in newfiles:
            if bbmask and bbmask_compiled.search(f):
                collectlog.debug(1, "skipping masked file %s", f)
                masked += 1
                continue
            if f.endswith('.bb'):
                bbfiles.append(f)
            elif f.endswith('.bbappend'):
                bbappend.append(f)
            else:
                collectlog.debug(1, "skipping %s: unknown file extension", f)

        # Build a list of .bbappend files for each .bb file
        for f in bbappend:
            base = os.path.basename(f).replace('.bbappend', '.bb')
            if not base in self.appendlist:
               self.appendlist[base] = []
            if f not in self.appendlist[base]:
                self.appendlist[base].append(f)

        # Find overlayed recipes
        # bbfiles will be in priority order which makes this easy
        bbfile_seen = dict()
        self.overlayed = defaultdict(list)
        for f in reversed(bbfiles):
            base = os.path.basename(f)
            if base not in bbfile_seen:
                bbfile_seen[base] = f
            else:
                topfile = bbfile_seen[base]
                self.overlayed[topfile].append(f)

        return (bbfiles, masked)

    def get_file_appends(self, fn):
        """
        Returns a list of .bbappend files to apply to fn
        NB: collect_bbfiles() must have been called prior to this
        """
        f = os.path.basename(fn)
        if f in self.appendlist:
            return self.appendlist[f]
        return []

    def pre_serve(self):
        # Empty the environment. The environment will be populated as
        # necessary from the data store.
        #bb.utils.empty_environment()
        try:
            prserv.serv.auto_start(self.configuration.data)
        except prserv.serv.PRServiceConfigError:
            bb.event.fire(CookerExit(), self.configuration.event_data)
        return

    def post_serve(self):
        prserv.serv.auto_shutdown(self.configuration.data)
        bb.event.fire(CookerExit(), self.configuration.event_data)

    def shutdown(self):
        self.state = state.shutdown

    def stop(self):
        self.state = state.stop

    def reparseFiles(self):
        return

    def initialize(self):
        self.state = state.initial
        self.initConfigurationData()

    def reset(self):
        self.state = state.initial
        self.loadConfigurationData()

def server_main(cooker, func, *args):
    cooker.pre_serve()

    if cooker.configuration.profile:
        try:
            import cProfile as profile
        except:
            import profile
        prof = profile.Profile()

        ret = profile.Profile.runcall(prof, func, *args)

        prof.dump_stats("profile.log")

        # Redirect stdout to capture profile information
        pout = open('profile.log.processed', 'w')
        so = sys.stdout.fileno()
        orig_so = os.dup(sys.stdout.fileno())
        os.dup2(pout.fileno(), so)
   
        import pstats
        p = pstats.Stats('profile.log')
        p.sort_stats('time')
        p.print_stats()
        p.print_callers()
        p.sort_stats('cumulative')
        p.print_stats()

        os.dup2(orig_so, so)
        pout.flush()
        pout.close()  

        print("Raw profiling information saved to profile.log and processed statistics to profile.log.processed")

    else:
        ret = func(*args)

    cooker.post_serve()

    return ret

class CookerExit(bb.event.Event):
    """
    Notify clients of the Cooker shutdown
    """

    def __init__(self):
        bb.event.Event.__init__(self)

def catch_parse_error(func):
    """Exception handling bits for our parsing"""
    @wraps(func)
    def wrapped(fn, *args):
        try:
            return func(fn, *args)
        except (IOError, bb.parse.ParseError, bb.data_smart.ExpansionError) as exc:
            parselog.critical("Unable to parse %s: %s" % (fn, exc))
            sys.exit(1)
    return wrapped

@catch_parse_error
def _parse(fn, data, include=True):
    return bb.parse.handle(fn, data, include)

@catch_parse_error
def _inherit(bbclass, data):
    bb.parse.BBHandler.inherit(bbclass, "configuration INHERITs", 0, data)
    return data

class ParsingFailure(Exception):
    def __init__(self, realexception, recipe):
        self.realexception = realexception
        self.recipe = recipe
        Exception.__init__(self, realexception, recipe)

class Feeder(multiprocessing.Process):
    def __init__(self, jobs, to_parsers, quit):
        self.quit = quit
        self.jobs = jobs
        self.to_parsers = to_parsers
        multiprocessing.Process.__init__(self)

    def run(self):
        while True:
            try:
                quit = self.quit.get_nowait()
            except Queue.Empty:
                pass
            else:
                if quit == 'cancel':
                    self.to_parsers.cancel_join_thread()
                break

            try:
                job = self.jobs.pop()
            except IndexError:
                break

            try:
                self.to_parsers.put(job, timeout=0.5)
            except Queue.Full:
                self.jobs.insert(0, job)
                continue

class Parser(multiprocessing.Process):
    def __init__(self, jobs, results, quit, init):
        self.jobs = jobs
        self.results = results
        self.quit = quit
        self.init = init
        multiprocessing.Process.__init__(self)

    def run(self):
        if self.init:
            self.init()

        pending = []
        while True:
            try:
                self.quit.get_nowait()
            except Queue.Empty:
                pass
            else:
                self.results.cancel_join_thread()
                break

            if pending:
                result = pending.pop()
            else:
                try:
                    job = self.jobs.get(timeout=0.25)
                except Queue.Empty:
                    continue

                if job is None:
                    break
                result = self.parse(*job)

            try:
                self.results.put(result, timeout=0.25)
            except Queue.Full:
                pending.append(result)

    def parse(self, filename, appends, caches_array):
        try:
            return True, bb.cache.Cache.parse(filename, appends, self.cfg, caches_array)
        except Exception as exc:
            tb = sys.exc_info()[2]
            exc.recipe = filename
            exc.traceback = list(bb.exceptions.extract_traceback(tb, context=3))
            return True, exc
        # Need to turn BaseExceptions into Exceptions here so we gracefully shutdown
        # and for example a worker thread doesn't just exit on its own in response to
        # a SystemExit event for example.
        except BaseException as exc:
            return True, ParsingFailure(exc, filename)

class CookerParser(object):
    def __init__(self, cooker, filelist, masked):
        self.filelist = filelist
        self.cooker = cooker
        self.cfgdata = cooker.configuration.data
        self.cfghash = cooker.configuration.data_hash

        # Accounting statistics
        self.parsed = 0
        self.cached = 0
        self.error = 0
        self.masked = masked

        self.skipped = 0
        self.virtuals = 0
        self.total = len(filelist)

        self.current = 0
        self.num_processes = int(self.cfgdata.getVar("BB_NUMBER_PARSE_THREADS", True) or
                                 multiprocessing.cpu_count())

        self.bb_cache = bb.cache.Cache(self.cfgdata, self.cfghash, cooker.caches_array)
        self.fromcache = []
        self.willparse = []
        for filename in self.filelist:
            appends = self.cooker.get_file_appends(filename)
            if not self.bb_cache.cacheValid(filename, appends):
                self.willparse.append((filename, appends, cooker.caches_array))
            else:
                self.fromcache.append((filename, appends))
        self.toparse = self.total - len(self.fromcache)
        self.progress_chunk = max(self.toparse / 100, 1)

        self.start()
        self.haveshutdown = False

    def start(self):
        self.results = self.load_cached()
        self.processes = []
        if self.toparse:
            bb.event.fire(bb.event.ParseStarted(self.toparse), self.cfgdata)
            def init():
                Parser.cfg = self.cfgdata
                multiprocessing.util.Finalize(None, bb.codeparser.parser_cache_save, args=(self.cfgdata,), exitpriority=1)
                multiprocessing.util.Finalize(None, bb.fetch.fetcher_parse_save, args=(self.cfgdata,), exitpriority=1)

            self.feeder_quit = multiprocessing.Queue(maxsize=1)
            self.parser_quit = multiprocessing.Queue(maxsize=self.num_processes)
            self.jobs = multiprocessing.Queue(maxsize=self.num_processes)
            self.result_queue = multiprocessing.Queue()
            self.feeder = Feeder(self.willparse, self.jobs, self.feeder_quit)
            self.feeder.start()
            for i in range(0, self.num_processes):
                parser = Parser(self.jobs, self.result_queue, self.parser_quit, init)
                parser.start()
                self.processes.append(parser)

            self.results = itertools.chain(self.results, self.parse_generator())

    def shutdown(self, clean=True, force=False):
        if not self.toparse:
            return
        if self.haveshutdown:
            return
        self.haveshutdown = True

        if clean:
            event = bb.event.ParseCompleted(self.cached, self.parsed,
                                            self.skipped, self.masked,
                                            self.virtuals, self.error,
                                            self.total)

            bb.event.fire(event, self.cfgdata)
            self.feeder_quit.put(None)
            for process in self.processes:
                self.jobs.put(None)
        else:
            self.feeder_quit.put('cancel')

            self.parser_quit.cancel_join_thread()
            for process in self.processes:
                self.parser_quit.put(None)

            self.jobs.cancel_join_thread()

        for process in self.processes:
            if force:
                process.join(.1)
                process.terminate()
            else:
                process.join()
        self.feeder.join()

        sync = threading.Thread(target=self.bb_cache.sync)
        sync.start()
        multiprocessing.util.Finalize(None, sync.join, exitpriority=-100)
        bb.codeparser.parser_cache_savemerge(self.cooker.configuration.data)
        bb.fetch.fetcher_parse_done(self.cooker.configuration.data)

    def load_cached(self):
        for filename, appends in self.fromcache:
            cached, infos = self.bb_cache.load(filename, appends, self.cfgdata)
            yield not cached, infos

    def parse_generator(self):
        while True:
            if self.parsed >= self.toparse:
                break

            try:
                result = self.result_queue.get(timeout=0.25)
            except Queue.Empty:
                pass
            else:
                value = result[1]
                if isinstance(value, BaseException):
                    raise value
                else:
                    yield result

    def parse_next(self):
        result = []
        parsed = None
        try:
            parsed, result = self.results.next()
        except StopIteration:
            self.shutdown()
            return False
        except bb.BBHandledException as exc:
            self.error += 1
            logger.error('Failed to parse recipe: %s' % exc.recipe)
            self.shutdown(clean=False)
            return False
        except ParsingFailure as exc:
            self.error += 1
            logger.error('Unable to parse %s: %s' %
                     (exc.recipe, bb.exceptions.to_string(exc.realexception)))
            self.shutdown(clean=False)
            return False
        except bb.parse.ParseError as exc:
            self.error += 1
            logger.error(str(exc))
            self.shutdown(clean=False)
            return False
        except bb.data_smart.ExpansionError as exc:
            self.error += 1
            _, value, _ = sys.exc_info()
            logger.error('ExpansionError during parsing %s: %s', value.recipe, str(exc))
            self.shutdown(clean=False)
            return False
        except SyntaxError as exc:
            self.error += 1
            logger.error('Unable to parse %s', exc.recipe)
            self.shutdown(clean=False)
            return False
        except Exception as exc:
            self.error += 1
            etype, value, tb = sys.exc_info()
            if hasattr(value, "recipe"):
                logger.error('Unable to parse %s', value.recipe,
                            exc_info=(etype, value, exc.traceback))
            else:
                # Most likely, an exception occurred during raising an exception
                import traceback
                logger.error('Exception during parse: %s' % traceback.format_exc())
            self.shutdown(clean=False)
            return False

        self.current += 1
        self.virtuals += len(result)
        if parsed:
            self.parsed += 1
            if self.parsed % self.progress_chunk == 0:
                bb.event.fire(bb.event.ParseProgress(self.parsed, self.toparse),
                              self.cfgdata)
        else:
            self.cached += 1

        for virtualfn, info_array in result:
            if info_array[0].skipped:
                self.skipped += 1
                self.cooker.skiplist[virtualfn] = SkippedPackage(info_array[0])
            self.bb_cache.add_info(virtualfn, info_array, self.cooker.status,
                                        parsed=parsed)
        return True

    def reparse(self, filename):
        infos = self.bb_cache.parse(filename,
                                    self.cooker.get_file_appends(filename),
                                    self.cfgdata, self.cooker.caches_array)
        for vfn, info_array in infos:
            self.cooker.status.add_from_recipeinfo(vfn, info_array)