summaryrefslogtreecommitdiff
path: root/tools/moveconfig.py
blob: caa81ac2ed77af9e635c2b577e3838b314812cdc (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
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
#!/usr/bin/env python2
# SPDX-License-Identifier: GPL-2.0+
#
# Author: Masahiro Yamada <yamada.masahiro@socionext.com>
#

"""
Move config options from headers to defconfig files.

Since Kconfig was introduced to U-Boot, we have worked on moving
config options from headers to Kconfig (defconfig).

This tool intends to help this tremendous work.


Usage
-----

First, you must edit the Kconfig to add the menu entries for the configs
you are moving.

And then run this tool giving CONFIG names you want to move.
For example, if you want to move CONFIG_CMD_USB and CONFIG_SYS_TEXT_BASE,
simply type as follows:

  $ tools/moveconfig.py CONFIG_CMD_USB CONFIG_SYS_TEXT_BASE

The tool walks through all the defconfig files and move the given CONFIGs.

The log is also displayed on the terminal.

The log is printed for each defconfig as follows:

<defconfig_name>
    <action1>
    <action2>
    <action3>
    ...

<defconfig_name> is the name of the defconfig.

<action*> shows what the tool did for that defconfig.
It looks like one of the following:

 - Move 'CONFIG_... '
   This config option was moved to the defconfig

 - CONFIG_... is not defined in Kconfig.  Do nothing.
   The entry for this CONFIG was not found in Kconfig.  The option is not
   defined in the config header, either.  So, this case can be just skipped.

 - CONFIG_... is not defined in Kconfig (suspicious).  Do nothing.
   This option is defined in the config header, but its entry was not found
   in Kconfig.
   There are two common cases:
     - You forgot to create an entry for the CONFIG before running
       this tool, or made a typo in a CONFIG passed to this tool.
     - The entry was hidden due to unmet 'depends on'.
   The tool does not know if the result is reasonable, so please check it
   manually.

 - 'CONFIG_...' is the same as the define in Kconfig.  Do nothing.
   The define in the config header matched the one in Kconfig.
   We do not need to touch it.

 - Compiler is missing.  Do nothing.
   The compiler specified for this architecture was not found
   in your PATH environment.
   (If -e option is passed, the tool exits immediately.)

 - Failed to process.
   An error occurred during processing this defconfig.  Skipped.
   (If -e option is passed, the tool exits immediately on error.)

Finally, you will be asked, Clean up headers? [y/n]:

If you say 'y' here, the unnecessary config defines are removed
from the config headers (include/configs/*.h).
It just uses the regex method, so you should not rely on it.
Just in case, please do 'git diff' to see what happened.


How does it work?
-----------------

This tool runs configuration and builds include/autoconf.mk for every
defconfig.  The config options defined in Kconfig appear in the .config
file (unless they are hidden because of unmet dependency.)
On the other hand, the config options defined by board headers are seen
in include/autoconf.mk.  The tool looks for the specified options in both
of them to decide the appropriate action for the options.  If the given
config option is found in the .config, but its value does not match the
one from the board header, the config option in the .config is replaced
with the define in the board header.  Then, the .config is synced by
"make savedefconfig" and the defconfig is updated with it.

For faster processing, this tool handles multi-threading.  It creates
separate build directories where the out-of-tree build is run.  The
temporary build directories are automatically created and deleted as
needed.  The number of threads are chosen based on the number of the CPU
cores of your system although you can change it via -j (--jobs) option.


Toolchains
----------

Appropriate toolchain are necessary to generate include/autoconf.mk
for all the architectures supported by U-Boot.  Most of them are available
at the kernel.org site, some are not provided by kernel.org. This tool uses
the same tools as buildman, so see that tool for setup (e.g. --fetch-arch).


Tips and trips
--------------

To sync only X86 defconfigs:

   ./tools/moveconfig.py -s -d <(grep -l X86 configs/*)

or:

   grep -l X86 configs/* | ./tools/moveconfig.py -s -d -

To process CONFIG_CMD_FPGAD only for a subset of configs based on path match:

   ls configs/{hrcon*,iocon*,strider*} | \
       ./tools/moveconfig.py -Cy CONFIG_CMD_FPGAD -d -


Finding implied CONFIGs
-----------------------

Some CONFIG options can be implied by others and this can help to reduce
the size of the defconfig files. For example, CONFIG_X86 implies
CONFIG_CMD_IRQ, so we can put 'imply CMD_IRQ' under 'config X86' and
all x86 boards will have that option, avoiding adding CONFIG_CMD_IRQ to
each of the x86 defconfig files.

This tool can help find such configs. To use it, first build a database:

    ./tools/moveconfig.py -b

Then try to query it:

    ./tools/moveconfig.py -i CONFIG_CMD_IRQ
    CONFIG_CMD_IRQ found in 311/2384 defconfigs
    44 : CONFIG_SYS_FSL_ERRATUM_IFC_A002769
    41 : CONFIG_SYS_FSL_ERRATUM_A007075
    31 : CONFIG_SYS_FSL_DDR_VER_44
    28 : CONFIG_ARCH_P1010
    28 : CONFIG_SYS_FSL_ERRATUM_P1010_A003549
    28 : CONFIG_SYS_FSL_ERRATUM_SEC_A003571
    28 : CONFIG_SYS_FSL_ERRATUM_IFC_A003399
    25 : CONFIG_SYS_FSL_ERRATUM_A008044
    22 : CONFIG_ARCH_P1020
    21 : CONFIG_SYS_FSL_DDR_VER_46
    20 : CONFIG_MAX_PIRQ_LINKS
    20 : CONFIG_HPET_ADDRESS
    20 : CONFIG_X86
    20 : CONFIG_PCIE_ECAM_SIZE
    20 : CONFIG_IRQ_SLOT_COUNT
    20 : CONFIG_I8259_PIC
    20 : CONFIG_CPU_ADDR_BITS
    20 : CONFIG_RAMBASE
    20 : CONFIG_SYS_FSL_ERRATUM_A005871
    20 : CONFIG_PCIE_ECAM_BASE
    20 : CONFIG_X86_TSC_TIMER
    20 : CONFIG_I8254_TIMER
    20 : CONFIG_CMD_GETTIME
    19 : CONFIG_SYS_FSL_ERRATUM_A005812
    18 : CONFIG_X86_RUN_32BIT
    17 : CONFIG_CMD_CHIP_CONFIG
    ...

This shows a list of config options which might imply CONFIG_CMD_EEPROM along
with how many defconfigs they cover. From this you can see that CONFIG_X86
implies CONFIG_CMD_EEPROM. Therefore, instead of adding CONFIG_CMD_EEPROM to
the defconfig of every x86 board, you could add a single imply line to the
Kconfig file:

    config X86
        bool "x86 architecture"
        ...
        imply CMD_EEPROM

That will cover 20 defconfigs. Many of the options listed are not suitable as
they are not related. E.g. it would be odd for CONFIG_CMD_GETTIME to imply
CMD_EEPROM.

Using this search you can reduce the size of moveconfig patches.

You can automatically add 'imply' statements in the Kconfig with the -a
option:

    ./tools/moveconfig.py -s -i CONFIG_SCSI \
            -a CONFIG_ARCH_LS1021A,CONFIG_ARCH_LS1043A

This will add 'imply SCSI' to the two CONFIG options mentioned, assuming that
the database indicates that they do actually imply CONFIG_SCSI and do not
already have an 'imply SCSI'.

The output shows where the imply is added:

   18 : CONFIG_ARCH_LS1021A       arch/arm/cpu/armv7/ls102xa/Kconfig:1
   13 : CONFIG_ARCH_LS1043A       arch/arm/cpu/armv8/fsl-layerscape/Kconfig:11
   12 : CONFIG_ARCH_LS1046A       arch/arm/cpu/armv8/fsl-layerscape/Kconfig:31

The first number is the number of boards which can avoid having a special
CONFIG_SCSI option in their defconfig file if this 'imply' is added.
The location at the right is the Kconfig file and line number where the config
appears. For example, adding 'imply CONFIG_SCSI' to the 'config ARCH_LS1021A'
in arch/arm/cpu/armv7/ls102xa/Kconfig at line 1 will help 18 boards to reduce
the size of their defconfig files.

If you want to add an 'imply' to every imply config in the list, you can use

    ./tools/moveconfig.py -s -i CONFIG_SCSI -a all

To control which ones are displayed, use -I <list> where list is a list of
options (use '-I help' to see possible options and their meaning).

To skip showing you options that already have an 'imply' attached, use -A.

When you have finished adding 'imply' options you can regenerate the
defconfig files for affected boards with something like:

    git show --stat | ./tools/moveconfig.py -s -d -

This will regenerate only those defconfigs changed in the current commit.
If you start with (say) 100 defconfigs being changed in the commit, and add
a few 'imply' options as above, then regenerate, hopefully you can reduce the
number of defconfigs changed in the commit.


Available options
-----------------

 -c, --color
   Surround each portion of the log with escape sequences to display it
   in color on the terminal.

 -C, --commit
   Create a git commit with the changes when the operation is complete. A
   standard commit message is used which may need to be edited.

 -d, --defconfigs
  Specify a file containing a list of defconfigs to move.  The defconfig
  files can be given with shell-style wildcards. Use '-' to read from stdin.

 -n, --dry-run
   Perform a trial run that does not make any changes.  It is useful to
   see what is going to happen before one actually runs it.

 -e, --exit-on-error
   Exit immediately if Make exits with a non-zero status while processing
   a defconfig file.

 -s, --force-sync
   Do "make savedefconfig" forcibly for all the defconfig files.
   If not specified, "make savedefconfig" only occurs for cases
   where at least one CONFIG was moved.

 -S, --spl
   Look for moved config options in spl/include/autoconf.mk instead of
   include/autoconf.mk.  This is useful for moving options for SPL build
   because SPL related options (mostly prefixed with CONFIG_SPL_) are
   sometimes blocked by CONFIG_SPL_BUILD ifdef conditionals.

 -H, --headers-only
   Only cleanup the headers; skip the defconfig processing

 -j, --jobs
   Specify the number of threads to run simultaneously.  If not specified,
   the number of threads is the same as the number of CPU cores.

 -r, --git-ref
   Specify the git ref to clone for building the autoconf.mk. If unspecified
   use the CWD. This is useful for when changes to the Kconfig affect the
   default values and you want to capture the state of the defconfig from
   before that change was in effect. If in doubt, specify a ref pre-Kconfig
   changes (use HEAD if Kconfig changes are not committed). Worst case it will
   take a bit longer to run, but will always do the right thing.

 -v, --verbose
   Show any build errors as boards are built

 -y, --yes
   Instead of prompting, automatically go ahead with all operations. This
   includes cleaning up headers, CONFIG_SYS_EXTRA_OPTIONS, the config whitelist
   and the README.

To see the complete list of supported options, run

  $ tools/moveconfig.py -h

"""

import collections
import copy
import difflib
import filecmp
import fnmatch
import glob
import multiprocessing
import optparse
import os
import Queue
import re
import shutil
import subprocess
import sys
import tempfile
import threading
import time

sys.path.append(os.path.join(os.path.dirname(__file__), 'buildman'))
sys.path.append(os.path.join(os.path.dirname(__file__), 'patman'))
import bsettings
import kconfiglib
import toolchain

SHOW_GNU_MAKE = 'scripts/show-gnu-make'
SLEEP_TIME=0.03

STATE_IDLE = 0
STATE_DEFCONFIG = 1
STATE_AUTOCONF = 2
STATE_SAVEDEFCONFIG = 3

ACTION_MOVE = 0
ACTION_NO_ENTRY = 1
ACTION_NO_ENTRY_WARN = 2
ACTION_NO_CHANGE = 3

COLOR_BLACK        = '0;30'
COLOR_RED          = '0;31'
COLOR_GREEN        = '0;32'
COLOR_BROWN        = '0;33'
COLOR_BLUE         = '0;34'
COLOR_PURPLE       = '0;35'
COLOR_CYAN         = '0;36'
COLOR_LIGHT_GRAY   = '0;37'
COLOR_DARK_GRAY    = '1;30'
COLOR_LIGHT_RED    = '1;31'
COLOR_LIGHT_GREEN  = '1;32'
COLOR_YELLOW       = '1;33'
COLOR_LIGHT_BLUE   = '1;34'
COLOR_LIGHT_PURPLE = '1;35'
COLOR_LIGHT_CYAN   = '1;36'
COLOR_WHITE        = '1;37'

AUTO_CONF_PATH = 'include/config/auto.conf'
CONFIG_DATABASE = 'moveconfig.db'

CONFIG_LEN = len('CONFIG_')

### helper functions ###
def get_devnull():
    """Get the file object of '/dev/null' device."""
    try:
        devnull = subprocess.DEVNULL # py3k
    except AttributeError:
        devnull = open(os.devnull, 'wb')
    return devnull

def check_top_directory():
    """Exit if we are not at the top of source directory."""
    for f in ('README', 'Licenses'):
        if not os.path.exists(f):
            sys.exit('Please run at the top of source directory.')

def check_clean_directory():
    """Exit if the source tree is not clean."""
    for f in ('.config', 'include/config'):
        if os.path.exists(f):
            sys.exit("source tree is not clean, please run 'make mrproper'")

def get_make_cmd():
    """Get the command name of GNU Make.

    U-Boot needs GNU Make for building, but the command name is not
    necessarily "make". (for example, "gmake" on FreeBSD).
    Returns the most appropriate command name on your system.
    """
    process = subprocess.Popen([SHOW_GNU_MAKE], stdout=subprocess.PIPE)
    ret = process.communicate()
    if process.returncode:
        sys.exit('GNU Make not found')
    return ret[0].rstrip()

def get_matched_defconfig(line):
    """Get the defconfig files that match a pattern

    Args:
        line: Path or filename to match, e.g. 'configs/snow_defconfig' or
            'k2*_defconfig'. If no directory is provided, 'configs/' is
            prepended

    Returns:
        a list of matching defconfig files
    """
    dirname = os.path.dirname(line)
    if dirname:
        pattern = line
    else:
        pattern = os.path.join('configs', line)
    return glob.glob(pattern) + glob.glob(pattern + '_defconfig')

def get_matched_defconfigs(defconfigs_file):
    """Get all the defconfig files that match the patterns in a file.

    Args:
        defconfigs_file: File containing a list of defconfigs to process, or
            '-' to read the list from stdin

    Returns:
        A list of paths to defconfig files, with no duplicates
    """
    defconfigs = []
    if defconfigs_file == '-':
        fd = sys.stdin
        defconfigs_file = 'stdin'
    else:
        fd = open(defconfigs_file)
    for i, line in enumerate(fd):
        line = line.strip()
        if not line:
            continue # skip blank lines silently
        if ' ' in line:
            line = line.split(' ')[0]  # handle 'git log' input
        matched = get_matched_defconfig(line)
        if not matched:
            print >> sys.stderr, "warning: %s:%d: no defconfig matched '%s'" % \
                                                 (defconfigs_file, i + 1, line)

        defconfigs += matched

    # use set() to drop multiple matching
    return [ defconfig[len('configs') + 1:]  for defconfig in set(defconfigs) ]

def get_all_defconfigs():
    """Get all the defconfig files under the configs/ directory."""
    defconfigs = []
    for (dirpath, dirnames, filenames) in os.walk('configs'):
        dirpath = dirpath[len('configs') + 1:]
        for filename in fnmatch.filter(filenames, '*_defconfig'):
            defconfigs.append(os.path.join(dirpath, filename))

    return defconfigs

def color_text(color_enabled, color, string):
    """Return colored string."""
    if color_enabled:
        # LF should not be surrounded by the escape sequence.
        # Otherwise, additional whitespace or line-feed might be printed.
        return '\n'.join([ '\033[' + color + 'm' + s + '\033[0m' if s else ''
                           for s in string.split('\n') ])
    else:
        return string

def show_diff(a, b, file_path, color_enabled):
    """Show unidified diff.

    Arguments:
      a: A list of lines (before)
      b: A list of lines (after)
      file_path: Path to the file
      color_enabled: Display the diff in color
    """

    diff = difflib.unified_diff(a, b,
                                fromfile=os.path.join('a', file_path),
                                tofile=os.path.join('b', file_path))

    for line in diff:
        if line[0] == '-' and line[1] != '-':
            print color_text(color_enabled, COLOR_RED, line),
        elif line[0] == '+' and line[1] != '+':
            print color_text(color_enabled, COLOR_GREEN, line),
        else:
            print line,

def extend_matched_lines(lines, matched, pre_patterns, post_patterns, extend_pre,
                         extend_post):
    """Extend matched lines if desired patterns are found before/after already
    matched lines.

    Arguments:
      lines: A list of lines handled.
      matched: A list of line numbers that have been already matched.
               (will be updated by this function)
      pre_patterns: A list of regular expression that should be matched as
                    preamble.
      post_patterns: A list of regular expression that should be matched as
                     postamble.
      extend_pre: Add the line number of matched preamble to the matched list.
      extend_post: Add the line number of matched postamble to the matched list.
    """
    extended_matched = []

    j = matched[0]

    for i in matched:
        if i == 0 or i < j:
            continue
        j = i
        while j in matched:
            j += 1
        if j >= len(lines):
            break

        for p in pre_patterns:
            if p.search(lines[i - 1]):
                break
        else:
            # not matched
            continue

        for p in post_patterns:
            if p.search(lines[j]):
                break
        else:
            # not matched
            continue

        if extend_pre:
            extended_matched.append(i - 1)
        if extend_post:
            extended_matched.append(j)

    matched += extended_matched
    matched.sort()

def confirm(options, prompt):
    if not options.yes:
        while True:
            choice = raw_input('{} [y/n]: '.format(prompt))
            choice = choice.lower()
            print choice
            if choice == 'y' or choice == 'n':
                break

        if choice == 'n':
            return False

    return True

def cleanup_one_header(header_path, patterns, options):
    """Clean regex-matched lines away from a file.

    Arguments:
      header_path: path to the cleaned file.
      patterns: list of regex patterns.  Any lines matching to these
                patterns are deleted.
      options: option flags.
    """
    with open(header_path) as f:
        lines = f.readlines()

    matched = []
    for i, line in enumerate(lines):
        if i - 1 in matched and lines[i - 1][-2:] == '\\\n':
            matched.append(i)
            continue
        for pattern in patterns:
            if pattern.search(line):
                matched.append(i)
                break

    if not matched:
        return

    # remove empty #ifdef ... #endif, successive blank lines
    pattern_if = re.compile(r'#\s*if(def|ndef)?\W') #  #if, #ifdef, #ifndef
    pattern_elif = re.compile(r'#\s*el(if|se)\W')   #  #elif, #else
    pattern_endif = re.compile(r'#\s*endif\W')      #  #endif
    pattern_blank = re.compile(r'^\s*$')            #  empty line

    while True:
        old_matched = copy.copy(matched)
        extend_matched_lines(lines, matched, [pattern_if],
                             [pattern_endif], True, True)
        extend_matched_lines(lines, matched, [pattern_elif],
                             [pattern_elif, pattern_endif], True, False)
        extend_matched_lines(lines, matched, [pattern_if, pattern_elif],
                             [pattern_blank], False, True)
        extend_matched_lines(lines, matched, [pattern_blank],
                             [pattern_elif, pattern_endif], True, False)
        extend_matched_lines(lines, matched, [pattern_blank],
                             [pattern_blank], True, False)
        if matched == old_matched:
            break

    tolines = copy.copy(lines)

    for i in reversed(matched):
        tolines.pop(i)

    show_diff(lines, tolines, header_path, options.color)

    if options.dry_run:
        return

    with open(header_path, 'w') as f:
        for line in tolines:
            f.write(line)

def cleanup_headers(configs, options):
    """Delete config defines from board headers.

    Arguments:
      configs: A list of CONFIGs to remove.
      options: option flags.
    """
    if not confirm(options, 'Clean up headers?'):
        return

    patterns = []
    for config in configs:
        patterns.append(re.compile(r'#\s*define\s+%s\W' % config))
        patterns.append(re.compile(r'#\s*undef\s+%s\W' % config))

    for dir in 'include', 'arch', 'board':
        for (dirpath, dirnames, filenames) in os.walk(dir):
            if dirpath == os.path.join('include', 'generated'):
                continue
            for filename in filenames:
                if not fnmatch.fnmatch(filename, '*~'):
                    cleanup_one_header(os.path.join(dirpath, filename),
                                       patterns, options)

def cleanup_one_extra_option(defconfig_path, configs, options):
    """Delete config defines in CONFIG_SYS_EXTRA_OPTIONS in one defconfig file.

    Arguments:
      defconfig_path: path to the cleaned defconfig file.
      configs: A list of CONFIGs to remove.
      options: option flags.
    """

    start = 'CONFIG_SYS_EXTRA_OPTIONS="'
    end = '"\n'

    with open(defconfig_path) as f:
        lines = f.readlines()

    for i, line in enumerate(lines):
        if line.startswith(start) and line.endswith(end):
            break
    else:
        # CONFIG_SYS_EXTRA_OPTIONS was not found in this defconfig
        return

    old_tokens = line[len(start):-len(end)].split(',')
    new_tokens = []

    for token in old_tokens:
        pos = token.find('=')
        if not (token[:pos] if pos >= 0 else token) in configs:
            new_tokens.append(token)

    if new_tokens == old_tokens:
        return

    tolines = copy.copy(lines)

    if new_tokens:
        tolines[i] = start + ','.join(new_tokens) + end
    else:
        tolines.pop(i)

    show_diff(lines, tolines, defconfig_path, options.color)

    if options.dry_run:
        return

    with open(defconfig_path, 'w') as f:
        for line in tolines:
            f.write(line)

def cleanup_extra_options(configs, options):
    """Delete config defines in CONFIG_SYS_EXTRA_OPTIONS in defconfig files.

    Arguments:
      configs: A list of CONFIGs to remove.
      options: option flags.
    """
    if not confirm(options, 'Clean up CONFIG_SYS_EXTRA_OPTIONS?'):
        return

    configs = [ config[len('CONFIG_'):] for config in configs ]

    defconfigs = get_all_defconfigs()

    for defconfig in defconfigs:
        cleanup_one_extra_option(os.path.join('configs', defconfig), configs,
                                 options)

def cleanup_whitelist(configs, options):
    """Delete config whitelist entries

    Arguments:
      configs: A list of CONFIGs to remove.
      options: option flags.
    """
    if not confirm(options, 'Clean up whitelist entries?'):
        return

    with open(os.path.join('scripts', 'config_whitelist.txt')) as f:
        lines = f.readlines()

    lines = [x for x in lines if x.strip() not in configs]

    with open(os.path.join('scripts', 'config_whitelist.txt'), 'w') as f:
        f.write(''.join(lines))

def find_matching(patterns, line):
    for pat in patterns:
        if pat.search(line):
            return True
    return False

def cleanup_readme(configs, options):
    """Delete config description in README

    Arguments:
      configs: A list of CONFIGs to remove.
      options: option flags.
    """
    if not confirm(options, 'Clean up README?'):
        return

    patterns = []
    for config in configs:
        patterns.append(re.compile(r'^\s+%s' % config))

    with open('README') as f:
        lines = f.readlines()

    found = False
    newlines = []
    for line in lines:
        if not found:
            found = find_matching(patterns, line)
            if found:
                continue

        if found and re.search(r'^\s+CONFIG', line):
            found = False

        if not found:
            newlines.append(line)

    with open('README', 'w') as f:
        f.write(''.join(newlines))


### classes ###
class Progress:

    """Progress Indicator"""

    def __init__(self, total):
        """Create a new progress indicator.

        Arguments:
          total: A number of defconfig files to process.
        """
        self.current = 0
        self.total = total

    def inc(self):
        """Increment the number of processed defconfig files."""

        self.current += 1

    def show(self):
        """Display the progress."""
        print ' %d defconfigs out of %d\r' % (self.current, self.total),
        sys.stdout.flush()


class KconfigScanner:
    """Kconfig scanner."""

    def __init__(self):
        """Scan all the Kconfig files and create a Config object."""
        # Define environment variables referenced from Kconfig
        os.environ['srctree'] = os.getcwd()
        os.environ['UBOOTVERSION'] = 'dummy'
        os.environ['KCONFIG_OBJDIR'] = ''
        self.conf = kconfiglib.Config()


class KconfigParser:

    """A parser of .config and include/autoconf.mk."""

    re_arch = re.compile(r'CONFIG_SYS_ARCH="(.*)"')
    re_cpu = re.compile(r'CONFIG_SYS_CPU="(.*)"')

    def __init__(self, configs, options, build_dir):
        """Create a new parser.

        Arguments:
          configs: A list of CONFIGs to move.
          options: option flags.
          build_dir: Build directory.
        """
        self.configs = configs
        self.options = options
        self.dotconfig = os.path.join(build_dir, '.config')
        self.autoconf = os.path.join(build_dir, 'include', 'autoconf.mk')
        self.spl_autoconf = os.path.join(build_dir, 'spl', 'include',
                                         'autoconf.mk')
        self.config_autoconf = os.path.join(build_dir, AUTO_CONF_PATH)
        self.defconfig = os.path.join(build_dir, 'defconfig')

    def get_arch(self):
        """Parse .config file and return the architecture.

        Returns:
          Architecture name (e.g. 'arm').
        """
        arch = ''
        cpu = ''
        for line in open(self.dotconfig):
            m = self.re_arch.match(line)
            if m:
                arch = m.group(1)
                continue
            m = self.re_cpu.match(line)
            if m:
                cpu = m.group(1)

        if not arch:
            return None

        # fix-up for aarch64
        if arch == 'arm' and cpu == 'armv8':
            arch = 'aarch64'

        return arch

    def parse_one_config(self, config, dotconfig_lines, autoconf_lines):
        """Parse .config, defconfig, include/autoconf.mk for one config.

        This function looks for the config options in the lines from
        defconfig, .config, and include/autoconf.mk in order to decide
        which action should be taken for this defconfig.

        Arguments:
          config: CONFIG name to parse.
          dotconfig_lines: lines from the .config file.
          autoconf_lines: lines from the include/autoconf.mk file.

        Returns:
          A tupple of the action for this defconfig and the line
          matched for the config.
        """
        not_set = '# %s is not set' % config

        for line in autoconf_lines:
            line = line.rstrip()
            if line.startswith(config + '='):
                new_val = line
                break
        else:
            new_val = not_set

        for line in dotconfig_lines:
            line = line.rstrip()
            if line.startswith(config + '=') or line == not_set:
                old_val = line
                break
        else:
            if new_val == not_set:
                return (ACTION_NO_ENTRY, config)
            else:
                return (ACTION_NO_ENTRY_WARN, config)

        # If this CONFIG is neither bool nor trisate
        if old_val[-2:] != '=y' and old_val[-2:] != '=m' and old_val != not_set:
            # tools/scripts/define2mk.sed changes '1' to 'y'.
            # This is a problem if the CONFIG is int type.
            # Check the type in Kconfig and handle it correctly.
            if new_val[-2:] == '=y':
                new_val = new_val[:-1] + '1'

        return (ACTION_NO_CHANGE if old_val == new_val else ACTION_MOVE,
                new_val)

    def update_dotconfig(self):
        """Parse files for the config options and update the .config.

        This function parses the generated .config and include/autoconf.mk
        searching the target options.
        Move the config option(s) to the .config as needed.

        Arguments:
          defconfig: defconfig name.

        Returns:
          Return a tuple of (updated flag, log string).
          The "updated flag" is True if the .config was updated, False
          otherwise.  The "log string" shows what happend to the .config.
        """

        results = []
        updated = False
        suspicious = False
        rm_files = [self.config_autoconf, self.autoconf]

        if self.options.spl:
            if os.path.exists(self.spl_autoconf):
                autoconf_path = self.spl_autoconf
                rm_files.append(self.spl_autoconf)
            else:
                for f in rm_files:
                    os.remove(f)
                return (updated, suspicious,
                        color_text(self.options.color, COLOR_BROWN,
                                   "SPL is not enabled.  Skipped.") + '\n')
        else:
            autoconf_path = self.autoconf

        with open(self.dotconfig) as f:
            dotconfig_lines = f.readlines()

        with open(autoconf_path) as f:
            autoconf_lines = f.readlines()

        for config in self.configs:
            result = self.parse_one_config(config, dotconfig_lines,
                                           autoconf_lines)
            results.append(result)

        log = ''

        for (action, value) in results:
            if action == ACTION_MOVE:
                actlog = "Move '%s'" % value
                log_color = COLOR_LIGHT_GREEN
            elif action == ACTION_NO_ENTRY:
                actlog = "%s is not defined in Kconfig.  Do nothing." % value
                log_color = COLOR_LIGHT_BLUE
            elif action == ACTION_NO_ENTRY_WARN:
                actlog = "%s is not defined in Kconfig (suspicious).  Do nothing." % value
                log_color = COLOR_YELLOW
                suspicious = True
            elif action == ACTION_NO_CHANGE:
                actlog = "'%s' is the same as the define in Kconfig.  Do nothing." \
                         % value
                log_color = COLOR_LIGHT_PURPLE
            elif action == ACTION_SPL_NOT_EXIST:
                actlog = "SPL is not enabled for this defconfig.  Skip."
                log_color = COLOR_PURPLE
            else:
                sys.exit("Internal Error. This should not happen.")

            log += color_text(self.options.color, log_color, actlog) + '\n'

        with open(self.dotconfig, 'a') as f:
            for (action, value) in results:
                if action == ACTION_MOVE:
                    f.write(value + '\n')
                    updated = True

        self.results = results
        for f in rm_files:
            os.remove(f)

        return (updated, suspicious, log)

    def check_defconfig(self):
        """Check the defconfig after savedefconfig

        Returns:
          Return additional log if moved CONFIGs were removed again by
          'make savedefconfig'.
        """

        log = ''

        with open(self.defconfig) as f:
            defconfig_lines = f.readlines()

        for (action, value) in self.results:
            if action != ACTION_MOVE:
                continue
            if not value + '\n' in defconfig_lines:
                log += color_text(self.options.color, COLOR_YELLOW,
                                  "'%s' was removed by savedefconfig.\n" %
                                  value)

        return log


class DatabaseThread(threading.Thread):
    """This thread processes results from Slot threads.

    It collects the data in the master config directary. There is only one
    result thread, and this helps to serialise the build output.
    """
    def __init__(self, config_db, db_queue):
        """Set up a new result thread

        Args:
            builder: Builder which will be sent each result
        """
        threading.Thread.__init__(self)
        self.config_db = config_db
        self.db_queue= db_queue

    def run(self):
        """Called to start up the result thread.

        We collect the next result job and pass it on to the build.
        """
        while True:
            defconfig, configs = self.db_queue.get()
            self.config_db[defconfig] = configs
            self.db_queue.task_done()


class Slot:

    """A slot to store a subprocess.

    Each instance of this class handles one subprocess.
    This class is useful to control multiple threads
    for faster processing.
    """

    def __init__(self, toolchains, configs, options, progress, devnull,
		 make_cmd, reference_src_dir, db_queue):
        """Create a new process slot.

        Arguments:
          toolchains: Toolchains object containing toolchains.
          configs: A list of CONFIGs to move.
          options: option flags.
          progress: A progress indicator.
          devnull: A file object of '/dev/null'.
          make_cmd: command name of GNU Make.
          reference_src_dir: Determine the true starting config state from this
                             source tree.
          db_queue: output queue to write config info for the database
        """
        self.toolchains = toolchains
        self.options = options
        self.progress = progress
        self.build_dir = tempfile.mkdtemp()
        self.devnull = devnull
        self.make_cmd = (make_cmd, 'O=' + self.build_dir)
        self.reference_src_dir = reference_src_dir
        self.db_queue = db_queue
        self.parser = KconfigParser(configs, options, self.build_dir)
        self.state = STATE_IDLE
        self.failed_boards = set()
        self.suspicious_boards = set()

    def __del__(self):
        """Delete the working directory

        This function makes sure the temporary directory is cleaned away
        even if Python suddenly dies due to error.  It should be done in here
        because it is guaranteed the destructor is always invoked when the
        instance of the class gets unreferenced.

        If the subprocess is still running, wait until it finishes.
        """
        if self.state != STATE_IDLE:
            while self.ps.poll() == None:
                pass
        shutil.rmtree(self.build_dir)

    def add(self, defconfig):
        """Assign a new subprocess for defconfig and add it to the slot.

        If the slot is vacant, create a new subprocess for processing the
        given defconfig and add it to the slot.  Just returns False if
        the slot is occupied (i.e. the current subprocess is still running).

        Arguments:
          defconfig: defconfig name.

        Returns:
          Return True on success or False on failure
        """
        if self.state != STATE_IDLE:
            return False

        self.defconfig = defconfig
        self.log = ''
        self.current_src_dir = self.reference_src_dir
        self.do_defconfig()
        return True

    def poll(self):
        """Check the status of the subprocess and handle it as needed.

        Returns True if the slot is vacant (i.e. in idle state).
        If the configuration is successfully finished, assign a new
        subprocess to build include/autoconf.mk.
        If include/autoconf.mk is generated, invoke the parser to
        parse the .config and the include/autoconf.mk, moving
        config options to the .config as needed.
        If the .config was updated, run "make savedefconfig" to sync
        it, update the original defconfig, and then set the slot back
        to the idle state.

        Returns:
          Return True if the subprocess is terminated, False otherwise
        """
        if self.state == STATE_IDLE:
            return True

        if self.ps.poll() == None:
            return False

        if self.ps.poll() != 0:
            self.handle_error()
        elif self.state == STATE_DEFCONFIG:
            if self.reference_src_dir and not self.current_src_dir:
                self.do_savedefconfig()
            else:
                self.do_autoconf()
        elif self.state == STATE_AUTOCONF:
            if self.current_src_dir:
                self.current_src_dir = None
                self.do_defconfig()
            elif self.options.build_db:
                self.do_build_db()
            else:
                self.do_savedefconfig()
        elif self.state == STATE_SAVEDEFCONFIG:
            self.update_defconfig()
        else:
            sys.exit("Internal Error. This should not happen.")

        return True if self.state == STATE_IDLE else False

    def handle_error(self):
        """Handle error cases."""

        self.log += color_text(self.options.color, COLOR_LIGHT_RED,
                               "Failed to process.\n")
        if self.options.verbose:
            self.log += color_text(self.options.color, COLOR_LIGHT_CYAN,
                                   self.ps.stderr.read())
        self.finish(False)

    def do_defconfig(self):
        """Run 'make <board>_defconfig' to create the .config file."""

        cmd = list(self.make_cmd)
        cmd.append(self.defconfig)
        self.ps = subprocess.Popen(cmd, stdout=self.devnull,
                                   stderr=subprocess.PIPE,
                                   cwd=self.current_src_dir)
        self.state = STATE_DEFCONFIG

    def do_autoconf(self):
        """Run 'make AUTO_CONF_PATH'."""

        arch = self.parser.get_arch()
        try:
            toolchain = self.toolchains.Select(arch)
        except ValueError:
            self.log += color_text(self.options.color, COLOR_YELLOW,
                    "Tool chain for '%s' is missing.  Do nothing.\n" % arch)
            self.finish(False)
            return
	env = toolchain.MakeEnvironment(False)

        cmd = list(self.make_cmd)
        cmd.append('KCONFIG_IGNORE_DUPLICATES=1')
        cmd.append(AUTO_CONF_PATH)
        self.ps = subprocess.Popen(cmd, stdout=self.devnull, env=env,
                                   stderr=subprocess.PIPE,
                                   cwd=self.current_src_dir)
        self.state = STATE_AUTOCONF

    def do_build_db(self):
        """Add the board to the database"""
        configs = {}
        with open(os.path.join(self.build_dir, AUTO_CONF_PATH)) as fd:
            for line in fd.readlines():
                if line.startswith('CONFIG'):
                    config, value = line.split('=', 1)
                    configs[config] = value.rstrip()
        self.db_queue.put([self.defconfig, configs])
        self.finish(True)

    def do_savedefconfig(self):
        """Update the .config and run 'make savedefconfig'."""

        (updated, suspicious, log) = self.parser.update_dotconfig()
        if suspicious:
            self.suspicious_boards.add(self.defconfig)
        self.log += log

        if not self.options.force_sync and not updated:
            self.finish(True)
            return
        if updated:
            self.log += color_text(self.options.color, COLOR_LIGHT_GREEN,
                                   "Syncing by savedefconfig...\n")
        else:
            self.log += "Syncing by savedefconfig (forced by option)...\n"

        cmd = list(self.make_cmd)
        cmd.append('savedefconfig')
        self.ps = subprocess.Popen(cmd, stdout=self.devnull,
                                   stderr=subprocess.PIPE)
        self.state = STATE_SAVEDEFCONFIG

    def update_defconfig(self):
        """Update the input defconfig and go back to the idle state."""

        log = self.parser.check_defconfig()
        if log:
            self.suspicious_boards.add(self.defconfig)
            self.log += log
        orig_defconfig = os.path.join('configs', self.defconfig)
        new_defconfig = os.path.join(self.build_dir, 'defconfig')
        updated = not filecmp.cmp(orig_defconfig, new_defconfig)

        if updated:
            self.log += color_text(self.options.color, COLOR_LIGHT_BLUE,
                                   "defconfig was updated.\n")

        if not self.options.dry_run and updated:
            shutil.move(new_defconfig, orig_defconfig)
        self.finish(True)

    def finish(self, success):
        """Display log along with progress and go to the idle state.

        Arguments:
          success: Should be True when the defconfig was processed
                   successfully, or False when it fails.
        """
        # output at least 30 characters to hide the "* defconfigs out of *".
        log = self.defconfig.ljust(30) + '\n'

        log += '\n'.join([ '    ' + s for s in self.log.split('\n') ])
        # Some threads are running in parallel.
        # Print log atomically to not mix up logs from different threads.
        print >> (sys.stdout if success else sys.stderr), log

        if not success:
            if self.options.exit_on_error:
                sys.exit("Exit on error.")
            # If --exit-on-error flag is not set, skip this board and continue.
            # Record the failed board.
            self.failed_boards.add(self.defconfig)

        self.progress.inc()
        self.progress.show()
        self.state = STATE_IDLE

    def get_failed_boards(self):
        """Returns a set of failed boards (defconfigs) in this slot.
        """
        return self.failed_boards

    def get_suspicious_boards(self):
        """Returns a set of boards (defconfigs) with possible misconversion.
        """
        return self.suspicious_boards - self.failed_boards

class Slots:

    """Controller of the array of subprocess slots."""

    def __init__(self, toolchains, configs, options, progress,
		 reference_src_dir, db_queue):
        """Create a new slots controller.

        Arguments:
          toolchains: Toolchains object containing toolchains.
          configs: A list of CONFIGs to move.
          options: option flags.
          progress: A progress indicator.
          reference_src_dir: Determine the true starting config state from this
                             source tree.
          db_queue: output queue to write config info for the database
        """
        self.options = options
        self.slots = []
        devnull = get_devnull()
        make_cmd = get_make_cmd()
        for i in range(options.jobs):
            self.slots.append(Slot(toolchains, configs, options, progress,
				   devnull, make_cmd, reference_src_dir,
				   db_queue))

    def add(self, defconfig):
        """Add a new subprocess if a vacant slot is found.

        Arguments:
          defconfig: defconfig name to be put into.

        Returns:
          Return True on success or False on failure
        """
        for slot in self.slots:
            if slot.add(defconfig):
                return True
        return False

    def available(self):
        """Check if there is a vacant slot.

        Returns:
          Return True if at lease one vacant slot is found, False otherwise.
        """
        for slot in self.slots:
            if slot.poll():
                return True
        return False

    def empty(self):
        """Check if all slots are vacant.

        Returns:
          Return True if all the slots are vacant, False otherwise.
        """
        ret = True
        for slot in self.slots:
            if not slot.poll():
                ret = False
        return ret

    def show_failed_boards(self):
        """Display all of the failed boards (defconfigs)."""
        boards = set()
        output_file = 'moveconfig.failed'

        for slot in self.slots:
            boards |= slot.get_failed_boards()

        if boards:
            boards = '\n'.join(boards) + '\n'
            msg = "The following boards were not processed due to error:\n"
            msg += boards
            msg += "(the list has been saved in %s)\n" % output_file
            print >> sys.stderr, color_text(self.options.color, COLOR_LIGHT_RED,
                                            msg)

            with open(output_file, 'w') as f:
                f.write(boards)

    def show_suspicious_boards(self):
        """Display all boards (defconfigs) with possible misconversion."""
        boards = set()
        output_file = 'moveconfig.suspicious'

        for slot in self.slots:
            boards |= slot.get_suspicious_boards()

        if boards:
            boards = '\n'.join(boards) + '\n'
            msg = "The following boards might have been converted incorrectly.\n"
            msg += "It is highly recommended to check them manually:\n"
            msg += boards
            msg += "(the list has been saved in %s)\n" % output_file
            print >> sys.stderr, color_text(self.options.color, COLOR_YELLOW,
                                            msg)

            with open(output_file, 'w') as f:
                f.write(boards)

class ReferenceSource:

    """Reference source against which original configs should be parsed."""

    def __init__(self, commit):
        """Create a reference source directory based on a specified commit.

        Arguments:
          commit: commit to git-clone
        """
        self.src_dir = tempfile.mkdtemp()
        print "Cloning git repo to a separate work directory..."
        subprocess.check_output(['git', 'clone', os.getcwd(), '.'],
                                cwd=self.src_dir)
        print "Checkout '%s' to build the original autoconf.mk." % \
            subprocess.check_output(['git', 'rev-parse', '--short', commit]).strip()
        subprocess.check_output(['git', 'checkout', commit],
                                stderr=subprocess.STDOUT, cwd=self.src_dir)

    def __del__(self):
        """Delete the reference source directory

        This function makes sure the temporary directory is cleaned away
        even if Python suddenly dies due to error.  It should be done in here
        because it is guaranteed the destructor is always invoked when the
        instance of the class gets unreferenced.
        """
        shutil.rmtree(self.src_dir)

    def get_dir(self):
        """Return the absolute path to the reference source directory."""

        return self.src_dir

def move_config(toolchains, configs, options, db_queue):
    """Move config options to defconfig files.

    Arguments:
      configs: A list of CONFIGs to move.
      options: option flags
    """
    if len(configs) == 0:
        if options.force_sync:
            print 'No CONFIG is specified. You are probably syncing defconfigs.',
        elif options.build_db:
            print 'Building %s database' % CONFIG_DATABASE
        else:
            print 'Neither CONFIG nor --force-sync is specified. Nothing will happen.',
    else:
        print 'Move ' + ', '.join(configs),
    print '(jobs: %d)\n' % options.jobs

    if options.git_ref:
        reference_src = ReferenceSource(options.git_ref)
        reference_src_dir = reference_src.get_dir()
    else:
        reference_src_dir = None

    if options.defconfigs:
        defconfigs = get_matched_defconfigs(options.defconfigs)
    else:
        defconfigs = get_all_defconfigs()

    progress = Progress(len(defconfigs))
    slots = Slots(toolchains, configs, options, progress, reference_src_dir,
		  db_queue)

    # Main loop to process defconfig files:
    #  Add a new subprocess into a vacant slot.
    #  Sleep if there is no available slot.
    for defconfig in defconfigs:
        while not slots.add(defconfig):
            while not slots.available():
                # No available slot: sleep for a while
                time.sleep(SLEEP_TIME)

    # wait until all the subprocesses finish
    while not slots.empty():
        time.sleep(SLEEP_TIME)

    print ''
    slots.show_failed_boards()
    slots.show_suspicious_boards()

def find_kconfig_rules(kconf, config, imply_config):
    """Check whether a config has a 'select' or 'imply' keyword

    Args:
        kconf: Kconfig.Config object
        config: Name of config to check (without CONFIG_ prefix)
        imply_config: Implying config (without CONFIG_ prefix) which may or
            may not have an 'imply' for 'config')

    Returns:
        Symbol object for 'config' if found, else None
    """
    sym = kconf.get_symbol(imply_config)
    if sym:
        for sel in sym.get_selected_symbols() | sym.get_implied_symbols():
            if sel.get_name() == config:
                return sym
    return None

def check_imply_rule(kconf, config, imply_config):
    """Check if we can add an 'imply' option

    This finds imply_config in the Kconfig and looks to see if it is possible
    to add an 'imply' for 'config' to that part of the Kconfig.

    Args:
        kconf: Kconfig.Config object
        config: Name of config to check (without CONFIG_ prefix)
        imply_config: Implying config (without CONFIG_ prefix) which may or
            may not have an 'imply' for 'config')

    Returns:
        tuple:
            filename of Kconfig file containing imply_config, or None if none
            line number within the Kconfig file, or 0 if none
            message indicating the result
    """
    sym = kconf.get_symbol(imply_config)
    if not sym:
        return 'cannot find sym'
    locs = sym.get_def_locations()
    if len(locs) != 1:
        return '%d locations' % len(locs)
    fname, linenum = locs[0]
    cwd = os.getcwd()
    if cwd and fname.startswith(cwd):
        fname = fname[len(cwd) + 1:]
    file_line = ' at %s:%d' % (fname, linenum)
    with open(fname) as fd:
        data = fd.read().splitlines()
    if data[linenum - 1] != 'config %s' % imply_config:
        return None, 0, 'bad sym format %s%s' % (data[linenum], file_line)
    return fname, linenum, 'adding%s' % file_line

def add_imply_rule(config, fname, linenum):
    """Add a new 'imply' option to a Kconfig

    Args:
        config: config option to add an imply for (without CONFIG_ prefix)
        fname: Kconfig filename to update
        linenum: Line number to place the 'imply' before

    Returns:
        Message indicating the result
    """
    file_line = ' at %s:%d' % (fname, linenum)
    data = open(fname).read().splitlines()
    linenum -= 1

    for offset, line in enumerate(data[linenum:]):
        if line.strip().startswith('help') or not line:
            data.insert(linenum + offset, '\timply %s' % config)
            with open(fname, 'w') as fd:
                fd.write('\n'.join(data) + '\n')
            return 'added%s' % file_line

    return 'could not insert%s'

(IMPLY_MIN_2, IMPLY_TARGET, IMPLY_CMD, IMPLY_NON_ARCH_BOARD) = (
    1, 2, 4, 8)

IMPLY_FLAGS = {
    'min2': [IMPLY_MIN_2, 'Show options which imply >2 boards (normally >5)'],
    'target': [IMPLY_TARGET, 'Allow CONFIG_TARGET_... options to imply'],
    'cmd': [IMPLY_CMD, 'Allow CONFIG_CMD_... to imply'],
    'non-arch-board': [
        IMPLY_NON_ARCH_BOARD,
        'Allow Kconfig options outside arch/ and /board/ to imply'],
};

def do_imply_config(config_list, add_imply, imply_flags, skip_added,
                    check_kconfig=True, find_superset=False):
    """Find CONFIG options which imply those in the list

    Some CONFIG options can be implied by others and this can help to reduce
    the size of the defconfig files. For example, CONFIG_X86 implies
    CONFIG_CMD_IRQ, so we can put 'imply CMD_IRQ' under 'config X86' and
    all x86 boards will have that option, avoiding adding CONFIG_CMD_IRQ to
    each of the x86 defconfig files.

    This function uses the moveconfig database to find such options. It
    displays a list of things that could possibly imply those in the list.
    The algorithm ignores any that start with CONFIG_TARGET since these
    typically refer to only a few defconfigs (often one). It also does not
    display a config with less than 5 defconfigs.

    The algorithm works using sets. For each target config in config_list:
        - Get the set 'defconfigs' which use that target config
        - For each config (from a list of all configs):
            - Get the set 'imply_defconfig' of defconfigs which use that config
            -
            - If imply_defconfigs contains anything not in defconfigs then
              this config does not imply the target config

    Params:
        config_list: List of CONFIG options to check (each a string)
        add_imply: Automatically add an 'imply' for each config.
        imply_flags: Flags which control which implying configs are allowed
           (IMPLY_...)
        skip_added: Don't show options which already have an imply added.
        check_kconfig: Check if implied symbols already have an 'imply' or
            'select' for the target config, and show this information if so.
        find_superset: True to look for configs which are a superset of those
            already found. So for example if CONFIG_EXYNOS5 implies an option,
            but CONFIG_EXYNOS covers a larger set of defconfigs and also
            implies that option, this will drop the former in favour of the
            latter. In practice this option has not proved very used.

    Note the terminoloy:
        config - a CONFIG_XXX options (a string, e.g. 'CONFIG_CMD_EEPROM')
        defconfig - a defconfig file (a string, e.g. 'configs/snow_defconfig')
    """
    kconf = KconfigScanner().conf if check_kconfig else None
    if add_imply and add_imply != 'all':
        add_imply = add_imply.split()

    # key is defconfig name, value is dict of (CONFIG_xxx, value)
    config_db = {}

    # Holds a dict containing the set of defconfigs that contain each config
    # key is config, value is set of defconfigs using that config
    defconfig_db = collections.defaultdict(set)

    # Set of all config options we have seen
    all_configs = set()

    # Set of all defconfigs we have seen
    all_defconfigs = set()

    # Read in the database
    configs = {}
    with open(CONFIG_DATABASE) as fd:
        for line in fd.readlines():
            line = line.rstrip()
            if not line:  # Separator between defconfigs
                config_db[defconfig] = configs
                all_defconfigs.add(defconfig)
                configs = {}
            elif line[0] == ' ':  # CONFIG line
                config, value = line.strip().split('=', 1)
                configs[config] = value
                defconfig_db[config].add(defconfig)
                all_configs.add(config)
            else:  # New defconfig
                defconfig = line

    # Work through each target config option in tern, independently
    for config in config_list:
        defconfigs = defconfig_db.get(config)
        if not defconfigs:
            print '%s not found in any defconfig' % config
            continue

        # Get the set of defconfigs without this one (since a config cannot
        # imply itself)
        non_defconfigs = all_defconfigs - defconfigs
        num_defconfigs = len(defconfigs)
        print '%s found in %d/%d defconfigs' % (config, num_defconfigs,
                                                len(all_configs))

        # This will hold the results: key=config, value=defconfigs containing it
        imply_configs = {}
        rest_configs = all_configs - set([config])

        # Look at every possible config, except the target one
        for imply_config in rest_configs:
            if 'ERRATUM' in imply_config:
                continue
            if not (imply_flags & IMPLY_CMD):
                if 'CONFIG_CMD' in imply_config:
                    continue
            if not (imply_flags & IMPLY_TARGET):
                if 'CONFIG_TARGET' in imply_config:
                    continue

            # Find set of defconfigs that have this config
            imply_defconfig = defconfig_db[imply_config]

            # Get the intersection of this with defconfigs containing the
            # target config
            common_defconfigs = imply_defconfig & defconfigs

            # Get the set of defconfigs containing this config which DO NOT
            # also contain the taret config. If this set is non-empty it means
            # that this config affects other defconfigs as well as (possibly)
            # the ones affected by the target config. This means it implies
            # things we don't want to imply.
            not_common_defconfigs = imply_defconfig & non_defconfigs
            if not_common_defconfigs:
                continue

            # If there are common defconfigs, imply_config may be useful
            if common_defconfigs:
                skip = False
                if find_superset:
                    for prev in imply_configs.keys():
                        prev_count = len(imply_configs[prev])
                        count = len(common_defconfigs)
                        if (prev_count > count and
                            (imply_configs[prev] & common_defconfigs ==
                            common_defconfigs)):
                            # skip imply_config because prev is a superset
                            skip = True
                            break
                        elif count > prev_count:
                            # delete prev because imply_config is a superset
                            del imply_configs[prev]
                if not skip:
                    imply_configs[imply_config] = common_defconfigs

        # Now we have a dict imply_configs of configs which imply each config
        # The value of each dict item is the set of defconfigs containing that
        # config. Rank them so that we print the configs that imply the largest
        # number of defconfigs first.
        ranked_iconfigs = sorted(imply_configs,
                            key=lambda k: len(imply_configs[k]), reverse=True)
        kconfig_info = ''
        cwd = os.getcwd()
        add_list = collections.defaultdict(list)
        for iconfig in ranked_iconfigs:
            num_common = len(imply_configs[iconfig])

            # Don't bother if there are less than 5 defconfigs affected.
            if num_common < (2 if imply_flags & IMPLY_MIN_2 else 5):
                continue
            missing = defconfigs - imply_configs[iconfig]
            missing_str = ', '.join(missing) if missing else 'all'
            missing_str = ''
            show = True
            if kconf:
                sym = find_kconfig_rules(kconf, config[CONFIG_LEN:],
                                         iconfig[CONFIG_LEN:])
                kconfig_info = ''
                if sym:
                    locs = sym.get_def_locations()
                    if len(locs) == 1:
                        fname, linenum = locs[0]
                        if cwd and fname.startswith(cwd):
                            fname = fname[len(cwd) + 1:]
                        kconfig_info = '%s:%d' % (fname, linenum)
                        if skip_added:
                            show = False
                else:
                    sym = kconf.get_symbol(iconfig[CONFIG_LEN:])
                    fname = ''
                    if sym:
                        locs = sym.get_def_locations()
                        if len(locs) == 1:
                            fname, linenum = locs[0]
                            if cwd and fname.startswith(cwd):
                                fname = fname[len(cwd) + 1:]
                    in_arch_board = not sym or (fname.startswith('arch') or
                                                fname.startswith('board'))
                    if (not in_arch_board and
                        not (imply_flags & IMPLY_NON_ARCH_BOARD)):
                        continue

                    if add_imply and (add_imply == 'all' or
                                      iconfig in add_imply):
                        fname, linenum, kconfig_info = (check_imply_rule(kconf,
                                config[CONFIG_LEN:], iconfig[CONFIG_LEN:]))
                        if fname:
                            add_list[fname].append(linenum)

            if show and kconfig_info != 'skip':
                print '%5d : %-30s%-25s %s' % (num_common, iconfig.ljust(30),
                                              kconfig_info, missing_str)

        # Having collected a list of things to add, now we add them. We process
        # each file from the largest line number to the smallest so that
        # earlier additions do not affect our line numbers. E.g. if we added an
        # imply at line 20 it would change the position of each line after
        # that.
        for fname, linenums in add_list.iteritems():
            for linenum in sorted(linenums, reverse=True):
                add_imply_rule(config[CONFIG_LEN:], fname, linenum)


def main():
    try:
        cpu_count = multiprocessing.cpu_count()
    except NotImplementedError:
        cpu_count = 1

    parser = optparse.OptionParser()
    # Add options here
    parser.add_option('-a', '--add-imply', type='string', default='',
                      help='comma-separated list of CONFIG options to add '
                      "an 'imply' statement to for the CONFIG in -i")
    parser.add_option('-A', '--skip-added', action='store_true', default=False,
                      help="don't show options which are already marked as "
                      'implying others')
    parser.add_option('-b', '--build-db', action='store_true', default=False,
                      help='build a CONFIG database')
    parser.add_option('-c', '--color', action='store_true', default=False,
                      help='display the log in color')
    parser.add_option('-C', '--commit', action='store_true', default=False,
                      help='Create a git commit for the operation')
    parser.add_option('-d', '--defconfigs', type='string',
                      help='a file containing a list of defconfigs to move, '
                      "one per line (for example 'snow_defconfig') "
                      "or '-' to read from stdin")
    parser.add_option('-i', '--imply', action='store_true', default=False,
                      help='find options which imply others')
    parser.add_option('-I', '--imply-flags', type='string', default='',
                      help="control the -i option ('help' for help")
    parser.add_option('-n', '--dry-run', action='store_true', default=False,
                      help='perform a trial run (show log with no changes)')
    parser.add_option('-e', '--exit-on-error', action='store_true',
                      default=False,
                      help='exit immediately on any error')
    parser.add_option('-s', '--force-sync', action='store_true', default=False,
                      help='force sync by savedefconfig')
    parser.add_option('-S', '--spl', action='store_true', default=False,
                      help='parse config options defined for SPL build')
    parser.add_option('-H', '--headers-only', dest='cleanup_headers_only',
                      action='store_true', default=False,
                      help='only cleanup the headers')
    parser.add_option('-j', '--jobs', type='int', default=cpu_count,
                      help='the number of jobs to run simultaneously')
    parser.add_option('-r', '--git-ref', type='string',
                      help='the git ref to clone for building the autoconf.mk')
    parser.add_option('-y', '--yes', action='store_true', default=False,
                      help="respond 'yes' to any prompts")
    parser.add_option('-v', '--verbose', action='store_true', default=False,
                      help='show any build errors as boards are built')
    parser.usage += ' CONFIG ...'

    (options, configs) = parser.parse_args()

    if len(configs) == 0 and not any((options.force_sync, options.build_db,
                                      options.imply)):
        parser.print_usage()
        sys.exit(1)

    # prefix the option name with CONFIG_ if missing
    configs = [ config if config.startswith('CONFIG_') else 'CONFIG_' + config
                for config in configs ]

    check_top_directory()

    if options.imply:
        imply_flags = 0
        if options.imply_flags == 'all':
            imply_flags = -1

        elif options.imply_flags:
            for flag in options.imply_flags.split(','):
                bad = flag not in IMPLY_FLAGS
                if bad:
                    print "Invalid flag '%s'" % flag
                if flag == 'help' or bad:
                    print "Imply flags: (separate with ',')"
                    for name, info in IMPLY_FLAGS.iteritems():
                        print ' %-15s: %s' % (name, info[1])
                    parser.print_usage()
                    sys.exit(1)
                imply_flags |= IMPLY_FLAGS[flag][0]

        do_imply_config(configs, options.add_imply, imply_flags,
                        options.skip_added)
        return

    config_db = {}
    db_queue = Queue.Queue()
    t = DatabaseThread(config_db, db_queue)
    t.setDaemon(True)
    t.start()

    if not options.cleanup_headers_only:
        check_clean_directory()
	bsettings.Setup('')
        toolchains = toolchain.Toolchains()
        toolchains.GetSettings()
        toolchains.Scan(verbose=False)
        move_config(toolchains, configs, options, db_queue)
        db_queue.join()

    if configs:
        cleanup_headers(configs, options)
        cleanup_extra_options(configs, options)
        cleanup_whitelist(configs, options)
        cleanup_readme(configs, options)

    if options.commit:
        subprocess.call(['git', 'add', '-u'])
        if configs:
            msg = 'Convert %s %sto Kconfig' % (configs[0],
                    'et al ' if len(configs) > 1 else '')
            msg += ('\n\nThis converts the following to Kconfig:\n   %s\n' %
                    '\n   '.join(configs))
        else:
            msg = 'configs: Resync with savedefconfig'
            msg += '\n\nRsync all defconfig files using moveconfig.py'
        subprocess.call(['git', 'commit', '-s', '-m', msg])

    if options.build_db:
        with open(CONFIG_DATABASE, 'w') as fd:
            for defconfig, configs in config_db.iteritems():
                fd.write('%s\n' % defconfig)
                for config in sorted(configs.keys()):
                    fd.write('   %s=%s\n' % (config, configs[config]))
                fd.write('\n')

if __name__ == '__main__':
    main()