summaryrefslogtreecommitdiff
path: root/t/test-lib-functions.sh
blob: 6da7273f1d5fdd08f5581cfb771f1bb83f8ef6bb (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
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
# Library of functions shared by all tests scripts, included by
# test-lib.sh.
#
# Copyright (c) 2005 Junio C Hamano
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see http://www.gnu.org/licenses/ .
 
# The semantics of the editor variables are that of invoking
# sh -c "$EDITOR \"$@\"" files ...
#
# If our trash directory contains shell metacharacters, they will be
# interpreted if we just set $EDITOR directly, so do a little dance with
# environment variables to work around this.
#
# In particular, quoting isn't enough, as the path may contain the same quote
# that we're using.
test_set_editor () {
	FAKE_EDITOR="$1"
	export FAKE_EDITOR
	EDITOR='"$FAKE_EDITOR"'
	export EDITOR
}
 
test_decode_color () {
	awk '
		function name(n) {
			if (n == 0) return "RESET";
			if (n == 1) return "BOLD";
			if (n == 2) return "FAINT";
			if (n == 3) return "ITALIC";
			if (n == 7) return "REVERSE";
			if (n == 30) return "BLACK";
			if (n == 31) return "RED";
			if (n == 32) return "GREEN";
			if (n == 33) return "YELLOW";
			if (n == 34) return "BLUE";
			if (n == 35) return "MAGENTA";
			if (n == 36) return "CYAN";
			if (n == 37) return "WHITE";
			if (n == 40) return "BLACK";
			if (n == 41) return "BRED";
			if (n == 42) return "BGREEN";
			if (n == 43) return "BYELLOW";
			if (n == 44) return "BBLUE";
			if (n == 45) return "BMAGENTA";
			if (n == 46) return "BCYAN";
			if (n == 47) return "BWHITE";
		}
		{
			while (match($0, /\033\[[0-9;]*m/) != 0) {
				printf "%s<", substr($0, 1, RSTART-1);
				codes = substr($0, RSTART+2, RLENGTH-3);
				if (length(codes) == 0)
					printf "%s", name(0)
				else {
					n = split(codes, ary, ";");
					sep = "";
					for (i = 1; i <= n; i++) {
						printf "%s%s", sep, name(ary[i]);
						sep = ";"
					}
				}
				printf ">";
				$0 = substr($0, RSTART + RLENGTH, length($0) - RSTART - RLENGTH + 1);
			}
			print
		}
	'
}
 
lf_to_nul () {
	perl -pe 'y/\012/\000/'
}
 
nul_to_q () {
	perl -pe 'y/\000/Q/'
}
 
q_to_nul () {
	perl -pe 'y/Q/\000/'
}
 
q_to_cr () {
	tr Q '\015'
}
 
q_to_tab () {
	tr Q '\011'
}
 
qz_to_tab_space () {
	tr QZ '\011\040'
}
 
append_cr () {
	sed -e 's/$/Q/' | tr Q '\015'
}
 
remove_cr () {
	tr '\015' Q | sed -e 's/Q$//'
}
 
# In some bourne shell implementations, the "unset" builtin returns
# nonzero status when a variable to be unset was not set in the first
# place.
#
# Use sane_unset when that should not be considered an error.
 
sane_unset () {
	unset "$@"
	return 0
}
 
test_tick () {
	if test -z "${test_tick+set}"
	then
		test_tick=1112911993
	else
		test_tick=$(($test_tick + 60))
	fi
	GIT_COMMITTER_DATE="$test_tick -0700"
	GIT_AUTHOR_DATE="$test_tick -0700"
	export GIT_COMMITTER_DATE GIT_AUTHOR_DATE
}
 
# Stop execution and start a shell. This is useful for debugging tests.
#
# Be sure to remove all invocations of this command before submitting.
# WARNING: the shell invoked by this helper does not have the same environment
# as the one running the tests (shell variables and functions are not
# available, and the options below further modify the environment). As such,
# commands copied from a test script might behave differently than when
# running the test.
#
# Usage: test_pause [options]
#   -t
#	Use your original TERM instead of test-lib.sh's "dumb".
#	This usually restores color output in the invoked shell.
#   -s
#	Invoke $SHELL instead of $TEST_SHELL_PATH.
#   -h
#	Use your original HOME instead of test-lib.sh's "$TRASH_DIRECTORY".
#	This allows you to use your regular shell environment and Git aliases.
#	CAUTION: running commands copied from a test script into the paused shell
#	might result in files in your HOME being overwritten.
#   -a
#	Shortcut for -t -s -h
 
test_pause () {
	PAUSE_TERM=$TERM &&
	PAUSE_SHELL=$TEST_SHELL_PATH &&
	PAUSE_HOME=$HOME &&
	while test $# != 0
	do
		case "$1" in
		-t)
			PAUSE_TERM="$USER_TERM"
			;;
		-s)
			PAUSE_SHELL="$SHELL"
			;;
		-h)
			PAUSE_HOME="$USER_HOME"
			;;
		-a)
			PAUSE_TERM="$USER_TERM"
			PAUSE_SHELL="$SHELL"
			PAUSE_HOME="$USER_HOME"
			;;
		*)
			break
			;;
		esac
		shift
	done &&
	TERM="$PAUSE_TERM" HOME="$PAUSE_HOME" "$PAUSE_SHELL" <&6 >&5 2>&7
}
 
# Wrap git with a debugger. Adding this to a command can make it easier
# to understand what is going on in a failing test.
#
# Usage: debug [options] <git command>
#   -d <debugger>
#   --debugger=<debugger>
#	Use <debugger> instead of GDB
#   -t
#	Use your original TERM instead of test-lib.sh's "dumb".
#	This usually restores color output in the debugger.
#	WARNING: the command being debugged might behave differently than when
#	running the test.
#
# Examples:
#     debug git checkout master
#     debug --debugger=nemiver git $ARGS
#     debug -d "valgrind --tool=memcheck --track-origins=yes" git $ARGS
debug () {
	GIT_DEBUGGER=1 &&
	DEBUG_TERM=$TERM &&
	while test $# != 0
	do
		case "$1" in
		-t)
			DEBUG_TERM="$USER_TERM"
			;;
		-d)
			GIT_DEBUGGER="$2" &&
			shift
			;;
		--debugger=*)
			GIT_DEBUGGER="${1#*=}"
			;;
		*)
			break
			;;
		esac
		shift
	done &&
 
	dotfiles=".gdbinit .lldbinit"
 
	for dotfile in $dotfiles
	do
		dotfile="$USER_HOME/$dotfile" &&
		test -f "$dotfile" && cp "$dotfile" "$HOME" || :
	done &&
 
	TERM="$DEBUG_TERM" GIT_DEBUGGER="${GIT_DEBUGGER}" "$@" <&6 >&5 2>&7 &&
 
	for dotfile in $dotfiles
	do
		rm -f "$HOME/$dotfile"
	done
}
 
# Usage: test_commit [options] <message> [<file> [<contents> [<tag>]]]
#   -C <dir>:
#	Run all git commands in directory <dir>
#   --notick
#	Do not call test_tick before making a commit
#   --append
#	Use ">>" instead of ">" when writing "<contents>" to "<file>"
#   --printf
#       Use "printf" instead of "echo" when writing "<contents>" to
#       "<file>", use this to write escape sequences such as "\0", a
#       trailing "\n" won't be added automatically. This option
#       supports nothing but the FORMAT of printf(1), i.e. no custom
#       ARGUMENT(s).
#   --signoff
#	Invoke "git commit" with --signoff
#   --author <author>
#	Invoke "git commit" with --author <author>
#   --no-tag
#	Do not tag the resulting commit
#   --annotate
#	Create an annotated tag with "--annotate -m <message>". Calls
#	test_tick between making the commit and tag, unless --notick
#	is given.
#
# This will commit a file with the given contents and the given commit
# message, and tag the resulting commit with the given tag name.
#
# <file>, <contents>, and <tag> all default to <message>.
 
test_commit () {
	notick= &&
	echo=echo &&
	append= &&
	author= &&
	signoff= &&
	indir= &&
	tag=light &&
	while test $# != 0
	do
		case "$1" in
		--notick)
			notick=yes
			;;
		--printf)
			echo=printf
			;;
		--append)
			append=yes
			;;
		--author)
			author="$2"
			shift
			;;
		--signoff)
			signoff="$1"
			;;
		--date)
			notick=yes
			GIT_COMMITTER_DATE="$2"
			GIT_AUTHOR_DATE="$2"
			shift
			;;
		-C)
			indir="$2"
			shift
			;;
		--no-tag)
			tag=none
			;;
		--annotate)
			tag=annotate
			;;
		*)
			break
			;;
		esac
		shift
	done &&
	indir=${indir:+"$indir"/} &&
	file=${2:-"$1.t"} &&
	if test -n "$append"
	then
		$echo "${3-$1}" >>"$indir$file"
	else
		$echo "${3-$1}" >"$indir$file"
	fi &&
	git ${indir:+ -C "$indir"} add -- "$file" &&
	if test -z "$notick"
	then
		test_tick
	fi &&
	git ${indir:+ -C "$indir"} commit \
	    ${author:+ --author "$author"} \
	    $signoff -m "$1" &&
	case "$tag" in
	none)
		;;
	light)
		git ${indir:+ -C "$indir"} tag "${4:-$1}"
		;;
	annotate)
		if test -z "$notick"
		then
			test_tick
		fi &&
		git ${indir:+ -C "$indir"} tag -a -m "$1" "${4:-$1}"
		;;
	esac
}
 
# Call test_merge with the arguments "<message> <commit>", where <commit>
# can be a tag pointing to the commit-to-merge.
 
test_merge () {
	label="$1" &&
	shift &&
	test_tick &&
	git merge -m "$label" "$@" &&
	git tag "$label"
}
 
# Efficiently create <nr> commits, each with a unique number (from 1 to <nr>
# by default) in the commit message.
#
# Usage: test_commit_bulk [options] <nr>
#   -C <dir>:
#	Run all git commands in directory <dir>
#   --ref=<n>:
#	ref on which to create commits (default: HEAD)
#   --start=<n>:
#	number commit messages from <n> (default: 1)
#   --message=<msg>:
#	use <msg> as the commit mesasge (default: "commit %s")
#   --filename=<fn>:
#	modify <fn> in each commit (default: %s.t)
#   --contents=<string>:
#	place <string> in each file (default: "content %s")
#   --id=<string>:
#	shorthand to use <string> and %s in message, filename, and contents
#
# The message, filename, and contents strings are evaluated by printf, with the
# first "%s" replaced by the current commit number. So you can do:
#
#   test_commit_bulk --filename=file --contents="modification %s"
#
# to have every commit touch the same file, but with unique content.
#
test_commit_bulk () {
	tmpfile=.bulk-commit.input
	indir=.
	ref=HEAD
	n=1
	message='commit %s'
	filename='%s.t'
	contents='content %s'
	while test $# -gt 0
	do
		case "$1" in
		-C)
			indir=$2
			shift
			;;
		--ref=*)
			ref=${1#--*=}
			;;
		--start=*)
			n=${1#--*=}
			;;
		--message=*)
			message=${1#--*=}
			;;
		--filename=*)
			filename=${1#--*=}
			;;
		--contents=*)
			contents=${1#--*=}
			;;
		--id=*)
			message="${1#--*=} %s"
			filename="${1#--*=}-%s.t"
			contents="${1#--*=} %s"
			;;
		-*)
			BUG "invalid test_commit_bulk option: $1"
			;;
		*)
			break
			;;
		esac
		shift
	done
	total=$1
 
	add_from=
	if git -C "$indir" rev-parse --quiet --verify "$ref"
	then
		add_from=t
	fi
 
	while test "$total" -gt 0
	do
		test_tick &&
		echo "commit $ref"
		printf 'author %s <%s> %s\n' \
			"$GIT_AUTHOR_NAME" \
			"$GIT_AUTHOR_EMAIL" \
			"$GIT_AUTHOR_DATE"
		printf 'committer %s <%s> %s\n' \
			"$GIT_COMMITTER_NAME" \
			"$GIT_COMMITTER_EMAIL" \
			"$GIT_COMMITTER_DATE"
		echo "data <<EOF"
		printf "$message\n" $n
		echo "EOF"
		if test -n "$add_from"
		then
			echo "from $ref^0"
			add_from=
		fi
		printf "M 644 inline $filename\n" $n
		echo "data <<EOF"
		printf "$contents\n" $n
		echo "EOF"
		echo
		n=$((n + 1))
		total=$((total - 1))
	done >"$tmpfile"
 
	git -C "$indir" \
	    -c fastimport.unpacklimit=0 \
	    fast-import <"$tmpfile" || return 1
 
	# This will be left in place on failure, which may aid debugging.
	rm -f "$tmpfile"
 
	# If we updated HEAD, then be nice and update the index and working
	# tree, too.
	if test "$ref" = "HEAD"
	then
		git -C "$indir" checkout -f HEAD || return 1
	fi
 
}
 
# This function helps systems where core.filemode=false is set.
# Use it instead of plain 'chmod +x' to set or unset the executable bit
# of a file in the working directory and add it to the index.
 
test_chmod () {
	chmod "$@" &&
	git update-index --add "--chmod=$@"
}
 
# Get the modebits from a file or directory, ignoring the setgid bit (g+s).
# This bit is inherited by subdirectories at their creation. So we remove it
# from the returning string to prevent callers from having to worry about the
# state of the bit in the test directory.
#
test_modebits () {
	ls -ld "$1" | sed -e 's|^\(..........\).*|\1|' \
			  -e 's|^\(......\)S|\1-|' -e 's|^\(......\)s|\1x|'
}
 
# Unset a configuration variable, but don't fail if it doesn't exist.
test_unconfig () {
	config_dir=
	if test "$1" = -C
	then
		shift
		config_dir=$1
		shift
	fi
	git ${config_dir:+-C "$config_dir"} config --unset-all "$@"
	config_status=$?
	case "$config_status" in
	5) # ok, nothing to unset
		config_status=0
		;;
	esac
	return $config_status
}
 
# Set git config, automatically unsetting it after the test is over.
test_config () {
	config_dir=
	if test "$1" = -C
	then
		shift
		config_dir=$1
		shift
	fi
	test_when_finished "test_unconfig ${config_dir:+-C '$config_dir'} '$1'" &&
	git ${config_dir:+-C "$config_dir"} config "$@"
}
 
test_config_global () {
	test_when_finished "test_unconfig --global '$1'" &&
	git config --global "$@"
}
 
write_script () {
	{
		echo "#!${2-"$SHELL_PATH"}" &&
		cat
	} >"$1" &&
	chmod +x "$1"
}
 
# Usage: test_hook [options] <hook-name> <<-\EOF
#
#   -C <dir>:
#	Run all git commands in directory <dir>
#   --setup
#	Setup a hook for subsequent tests, i.e. don't remove it in a
#	"test_when_finished"
#   --clobber
#	Overwrite an existing <hook-name>, if it exists. Implies
#	--setup (i.e. the "test_when_finished" is assumed to have been
#	set up already).
#    --disable
#	Disable (chmod -x) an existing <hook-name>, which must exist.
#    --remove
#	Remove (rm -f) an existing <hook-name>, which must exist.
test_hook () {
	setup= &&
	clobber= &&
	disable= &&
	remove= &&
	indir= &&
	while test $# != 0
	do
		case "$1" in
		-C)
			indir="$2" &&
			shift
			;;
		--setup)
			setup=t
			;;
		--clobber)
			clobber=t
			;;
		--disable)
			disable=t
			;;
		--remove)
			remove=t
			;;
		-*)
			BUG "invalid argument: $1"
			;;
		*)
			break
			;;
		esac &&
		shift
	done &&
 
	git_dir=$(git -C "$indir" rev-parse --absolute-git-dir) &&
	hook_dir="$git_dir/hooks" &&
	hook_file="$hook_dir/$1" &&
	if test -n "$disable$remove"
	then
		test_path_is_file "$hook_file" &&
		if test -n "$disable"
		then
			chmod -x "$hook_file"
		elif test -n "$remove"
		then
			rm -f "$hook_file"
		fi &&
		return 0
	fi &&
	if test -z "$clobber"
	then
		test_path_is_missing "$hook_file"
	fi &&
	if test -z "$setup$clobber"
	then
		test_when_finished "rm \"$hook_file\""
	fi &&
	write_script "$hook_file"
}
 
# Use test_set_prereq to tell that a particular prerequisite is available.
# The prerequisite can later be checked for in two ways:
#
# - Explicitly using test_have_prereq.
#
# - Implicitly by specifying the prerequisite tag in the calls to
#   test_expect_{success,failure} and test_external{,_without_stderr}.
#
# The single parameter is the prerequisite tag (a simple word, in all
# capital letters by convention).
 
test_unset_prereq () {
	! test_have_prereq "$1" ||
	satisfied_prereq="${satisfied_prereq% $1 *} ${satisfied_prereq#* $1 }"
}
 
test_set_prereq () {
	if test -n "$GIT_TEST_FAIL_PREREQS_INTERNAL"
	then
		case "$1" in
		# The "!" case is handled below with
		# test_unset_prereq()
		!*)
			;;
		# (Temporary?) whitelist of things we can't easily
		# pretend not to support
		SYMLINKS)
			;;
		# Inspecting whether GIT_TEST_FAIL_PREREQS is on
		# should be unaffected.
		FAIL_PREREQS)
			;;
		*)
			return
		esac
	fi
 
	case "$1" in
	!*)
		test_unset_prereq "${1#!}"
		;;
	*)
		satisfied_prereq="$satisfied_prereq$1 "
		;;
	esac
}
satisfied_prereq=" "
lazily_testable_prereq= lazily_tested_prereq=
 
# Usage: test_lazy_prereq PREREQ 'script'
test_lazy_prereq () {
	lazily_testable_prereq="$lazily_testable_prereq$1 "
	eval test_prereq_lazily_$1=\$2
}
 
test_run_lazy_prereq_ () {
	script='
mkdir -p "$TRASH_DIRECTORY/prereq-test-dir-'"$1"'" &&
(
	cd "$TRASH_DIRECTORY/prereq-test-dir-'"$1"'" &&'"$2"'
)'
	say >&3 "checking prerequisite: $1"
	say >&3 "$script"
	test_eval_ "$script"
	eval_ret=$?
	rm -rf "$TRASH_DIRECTORY/prereq-test-dir-$1"
	if test "$eval_ret" = 0; then
		say >&3 "prerequisite $1 ok"
	else
		say >&3 "prerequisite $1 not satisfied"
	fi
	return $eval_ret
}
 
test_have_prereq () {
	# prerequisites can be concatenated with ','
	save_IFS=$IFS
	IFS=,
	set -- $*
	IFS=$save_IFS
 
	total_prereq=0
	ok_prereq=0
	missing_prereq=
 
	for prerequisite
	do
		case "$prerequisite" in
		!*)
			negative_prereq=t
			prerequisite=${prerequisite#!}
			;;
		*)
			negative_prereq=
		esac
 
		case " $lazily_tested_prereq " in
		*" $prerequisite "*)
			;;
		*)
			case " $lazily_testable_prereq " in
			*" $prerequisite "*)
				eval "script=\$test_prereq_lazily_$prerequisite" &&
				if test_run_lazy_prereq_ "$prerequisite" "$script"
				then
					test_set_prereq $prerequisite
				fi
				lazily_tested_prereq="$lazily_tested_prereq$prerequisite "
			esac
			;;
		esac
 
		total_prereq=$(($total_prereq + 1))
		case "$satisfied_prereq" in
		*" $prerequisite "*)
			satisfied_this_prereq=t
			;;
		*)
			satisfied_this_prereq=
		esac
 
		case "$satisfied_this_prereq,$negative_prereq" in
		t,|,t)
			ok_prereq=$(($ok_prereq + 1))
			;;
		*)
			# Keep a list of missing prerequisites; restore
			# the negative marker if necessary.
			prerequisite=${negative_prereq:+!}$prerequisite
 
			# Abort if this prereq was marked as required
			if test -n "$GIT_TEST_REQUIRE_PREREQ"
			then
				case " $GIT_TEST_REQUIRE_PREREQ " in
				*" $prerequisite "*)
					BAIL_OUT "required prereq $prerequisite failed"
					;;
				esac
			fi
 
			if test -z "$missing_prereq"
			then
				missing_prereq=$prerequisite
			else
				missing_prereq="$prerequisite,$missing_prereq"
			fi
		esac
	done
 
	test $total_prereq = $ok_prereq
}
 
test_declared_prereq () {
	case ",$test_prereq," in
	*,$1,*)
		return 0
		;;
	esac
	return 1
}
 
test_verify_prereq () {
	test -z "$test_prereq" ||
	expr >/dev/null "$test_prereq" : '[A-Z0-9_,!]*$' ||
	BUG "'$test_prereq' does not look like a prereq"
}
 
test_expect_failure () {
	test_start_ "$@"
	test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
	test "$#" = 2 ||
	BUG "not 2 or 3 parameters to test-expect-failure"
	test_verify_prereq
	export test_prereq
	if ! test_skip "$@"
	then
		test -n "$test_skip_test_preamble" ||
		say >&3 "checking known breakage of $TEST_NUMBER.$test_count '$1': $2"
		if test_run_ "$2" expecting_failure
		then
			test_known_broken_ok_ "$1"
		else
			test_known_broken_failure_ "$1"
		fi
	fi
	test_finish_
}
 
test_expect_success () {
	test_start_ "$@"
	test "$#" = 3 && { test_prereq=$1; shift; } || test_prereq=
	test "$#" = 2 ||
	BUG "not 2 or 3 parameters to test-expect-success"
	test_verify_prereq
	export test_prereq
	if ! test_skip "$@"
	then
		test -n "$test_skip_test_preamble" ||
		say >&3 "expecting success of $TEST_NUMBER.$test_count '$1': $2"
		if test_run_ "$2"
		then
			test_ok_ "$1"
		else
			test_failure_ "$@"
		fi
	fi
	test_finish_
}
 
# test_external runs external test scripts that provide continuous
# test output about their progress, and succeeds/fails on
# zero/non-zero exit code.  It outputs the test output on stdout even
# in non-verbose mode, and announces the external script with "# run
# <n>: ..." before running it.  When providing relative paths, keep in
# mind that all scripts run in "trash directory".
# Usage: test_external description command arguments...
# Example: test_external 'Perl API' perl ../path/to/test.pl
test_external () {
	test "$#" = 4 && { test_prereq=$1; shift; } || test_prereq=
	test "$#" = 3 ||
	BUG "not 3 or 4 parameters to test_external"
	descr="$1"
	shift
	test_verify_prereq
	export test_prereq
	if ! test_skip "$descr" "$@"
	then
		# Announce the script to reduce confusion about the
		# test output that follows.
		say_color "" "# run $test_count: $descr ($*)"
		# Export TEST_DIRECTORY, TRASH_DIRECTORY and GIT_TEST_LONG
		# to be able to use them in script
		export TEST_DIRECTORY TRASH_DIRECTORY GIT_TEST_LONG
		# Run command; redirect its stderr to &4 as in
		# test_run_, but keep its stdout on our stdout even in
		# non-verbose mode.
		"$@" 2>&4
		if test "$?" = 0
		then
			if test $test_external_has_tap -eq 0; then
				test_ok_ "$descr"
			else
				say_color "" "# test_external test $descr was ok"
				test_success=$(($test_success + 1))
			fi
		else
			if test $test_external_has_tap -eq 0; then
				test_failure_ "$descr" "$@"
			else
				say_color error "# test_external test $descr failed: $@"
				test_failure=$(($test_failure + 1))
			fi
		fi
	fi
}
 
# Like test_external, but in addition tests that the command generated
# no output on stderr.
test_external_without_stderr () {
	# The temporary file has no (and must have no) security
	# implications.
	tmp=${TMPDIR:-/tmp}
	stderr="$tmp/git-external-stderr.$$.tmp"
	test_external "$@" 4> "$stderr"
	test -f "$stderr" || error "Internal error: $stderr disappeared."
	descr="no stderr: $1"
	shift
	say >&3 "# expecting no stderr from previous command"
	if test ! -s "$stderr"
	then
		rm "$stderr"
 
		if test $test_external_has_tap -eq 0; then
			test_ok_ "$descr"
		else
			say_color "" "# test_external_without_stderr test $descr was ok"
			test_success=$(($test_success + 1))
		fi
	else
		if test "$verbose" = t
		then
			output=$(echo; echo "# Stderr is:"; cat "$stderr")
		else
			output=
		fi
		# rm first in case test_failure exits.
		rm "$stderr"
		if test $test_external_has_tap -eq 0; then
			test_failure_ "$descr" "$@" "$output"
		else
			say_color error "# test_external_without_stderr test $descr failed: $@: $output"
			test_failure=$(($test_failure + 1))
		fi
	fi
}
 
# debugging-friendly alternatives to "test [-f|-d|-e]"
# The commands test the existence or non-existence of $1
test_path_is_file () {
	test "$#" -ne 1 && BUG "1 param"
	if ! test -f "$1"
	then
		echo "File $1 doesn't exist"
		false
	fi
}
 
test_path_is_file_not_symlink () {
	test "$#" -ne 1 && BUG "1 param"
	test_path_is_file "$1" &&
	if test -h "$1"
	then
		echo "$1 shouldn't be a symbolic link"
		false
	fi
}
 
test_path_is_dir () {
	test "$#" -ne 1 && BUG "1 param"
	if ! test -d "$1"
	then
		echo "Directory $1 doesn't exist"
		false
	fi
}
 
test_path_is_dir_not_symlink () {
	test "$#" -ne 1 && BUG "1 param"
	test_path_is_dir "$1" &&
	if test -h "$1"
	then
		echo "$1 shouldn't be a symbolic link"
		false
	fi
}
 
test_path_exists () {
	test "$#" -ne 1 && BUG "1 param"
	if ! test -e "$1"
	then
		echo "Path $1 doesn't exist"
		false
	fi
}
 
test_path_is_symlink () {
	test "$#" -ne 1 && BUG "1 param"
	if ! test -h "$1"
	then
		echo "Symbolic link $1 doesn't exist"
		false
	fi
}
 
# Check if the directory exists and is empty as expected, barf otherwise.
test_dir_is_empty () {
	test "$#" -ne 1 && BUG "1 param"
	test_path_is_dir "$1" &&
	if test -n "$(ls -a1 "$1" | egrep -v '^\.\.?$')"
	then
		echo "Directory '$1' is not empty, it contains:"
		ls -la "$1"
		return 1
	fi
}
 
# Check if the file exists and has a size greater than zero
test_file_not_empty () {
	test "$#" = 2 && BUG "2 param"
	if ! test -s "$1"
	then
		echo "'$1' is not a non-empty file."
		false
	fi
}
 
test_path_is_missing () {
	test "$#" -ne 1 && BUG "1 param"
	if test -e "$1"
	then
		echo "Path exists:"
		ls -ld "$1"
		if test $# -ge 1
		then
			echo "$*"
		fi
		false
	fi
}
 
# test_line_count checks that a file has the number of lines it
# ought to. For example:
#
#	test_expect_success 'produce exactly one line of output' '
#		do something >output &&
#		test_line_count = 1 output
#	'
#
# is like "test $(wc -l <output) = 1" except that it passes the
# output through when the number of lines is wrong.
 
test_line_count () {
	if test $# != 3
	then
		BUG "not 3 parameters to test_line_count"
	elif ! test $(wc -l <"$3") "$1" "$2"
	then
		echo "test_line_count: line count for $3 !$1 $2"
		cat "$3"
		return 1
	fi
}
 
# SYNOPSIS:
# 	test_stdout_line_count <bin-ops> <value> <cmd> [<args>...]
#
# test_stdout_line_count checks that the output of a command has the number
# of lines it ought to. For example:
#
# test_stdout_line_count = 3 git ls-files -u
# test_stdout_line_count -gt 10 ls
test_stdout_line_count () {
	local ops val trashdir &&
	if test "$#" -le 3
	then
		BUG "expect 3 or more arguments"
	fi &&
	ops="$1" &&
	val="$2" &&
	shift 2 &&
	if ! trashdir="$(git rev-parse --git-dir)/trash"; then
		BUG "expect to be run inside a worktree"
	fi &&
	mkdir -p "$trashdir" &&
	"$@" >"$trashdir/output" &&
	test_line_count "$ops" "$val" "$trashdir/output"
}
 
 
test_file_size () {
	test "$#" -ne 1 && BUG "1 param"
	test-tool path-utils file-size "$1"
}
 
# Returns success if a comma separated string of keywords ($1) contains a
# given keyword ($2).
# Examples:
# `list_contains "foo,bar" bar` returns 0
# `list_contains "foo" bar` returns 1
 
list_contains () {
	case ",$1," in
	*,$2,*)
		return 0
		;;
	esac
	return 1
}
 
# Returns success if the arguments indicate that a command should be
# accepted by test_must_fail(). If the command is run with env, the env
# and its corresponding variable settings will be stripped before we
# test the command being run.
test_must_fail_acceptable () {
	if test "$1" = "env"
	then
		shift
		while test $# -gt 0
		do
			case "$1" in
			*?=*)
				shift
				;;
			*)
				break
				;;
			esac
		done
	fi
 
	case "$1" in
	git|__git*|test-tool|test_terminal)
		return 0
		;;
	*)
		return 1
		;;
	esac
}
 
# This is not among top-level (test_expect_success | test_expect_failure)
# but is a prefix that can be used in the test script, like:
#
#	test_expect_success 'complain and die' '
#           do something &&
#           do something else &&
#	    test_must_fail git checkout ../outerspace
#	'
#
# Writing this as "! git checkout ../outerspace" is wrong, because
# the failure could be due to a segv.  We want a controlled failure.
#
# Accepts the following options:
#
#   ok=<signal-name>[,<...>]:
#     Don't treat an exit caused by the given signal as error.
#     Multiple signals can be specified as a comma separated list.
#     Currently recognized signal names are: sigpipe, success.
#     (Don't use 'success', use 'test_might_fail' instead.)
#
# Do not use this to run anything but "git" and other specific testable
# commands (see test_must_fail_acceptable()).  We are not in the
# business of vetting system supplied commands -- in other words, this
# is wrong:
#
#    test_must_fail grep pattern output
#
# Instead use '!':
#
#    ! grep pattern output
 
test_must_fail () {
	case "$1" in
	ok=*)
		_test_ok=${1#ok=}
		shift
		;;
	*)
		_test_ok=
		;;
	esac
	if ! test_must_fail_acceptable "$@"
	then
		echo >&7 "test_must_fail: only 'git' is allowed: $*"
		return 1
	fi
	"$@" 2>&7
	exit_code=$?
	if test $exit_code -eq 0 && ! list_contains "$_test_ok" success
	then
		echo >&4 "test_must_fail: command succeeded: $*"
		return 1
	elif test_match_signal 13 $exit_code && list_contains "$_test_ok" sigpipe
	then
		return 0
	elif test $exit_code -gt 129 && test $exit_code -le 192
	then
		echo >&4 "test_must_fail: died by signal $(($exit_code - 128)): $*"
		return 1
	elif test $exit_code -eq 127
	then
		echo >&4 "test_must_fail: command not found: $*"
		return 1
	elif test $exit_code -eq 126
	then
		echo >&4 "test_must_fail: valgrind error: $*"
		return 1
	fi
	return 0
} 7>&2 2>&4
 
# Similar to test_must_fail, but tolerates success, too.  This is
# meant to be used in contexts like:
#
#	test_expect_success 'some command works without configuration' '
#		test_might_fail git config --unset all.configuration &&
#		do something
#	'
#
# Writing "git config --unset all.configuration || :" would be wrong,
# because we want to notice if it fails due to segv.
#
# Accepts the same options as test_must_fail.
 
test_might_fail () {
	test_must_fail ok=success "$@" 2>&7
} 7>&2 2>&4
 
# Similar to test_must_fail and test_might_fail, but check that a
# given command exited with a given exit code. Meant to be used as:
#
#	test_expect_success 'Merge with d/f conflicts' '
#		test_expect_code 1 git merge "merge msg" B master
#	'
 
test_expect_code () {
	want_code=$1
	shift
	"$@" 2>&7
	exit_code=$?
	if test $exit_code = $want_code
	then
		return 0
	fi
 
	echo >&4 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
	return 1
} 7>&2 2>&4
 
# test_cmp is a helper function to compare actual and expected output.
# You can use it like:
#
#	test_expect_success 'foo works' '
#		echo expected >expected &&
#		foo >actual &&
#		test_cmp expected actual
#	'
#
# This could be written as either "cmp" or "diff -u", but:
# - cmp's output is not nearly as easy to read as diff -u
# - not all diff versions understand "-u"
 
test_cmp () {
	test "$#" -ne 2 && BUG "2 param"
	eval "$GIT_TEST_CMP" '"$@"'
}
 
# Check that the given config key has the expected value.
#
#    test_cmp_config [-C <dir>] <expected-value>
#                    [<git-config-options>...] <config-key>
#
# for example to check that the value of core.bar is foo
#
#    test_cmp_config foo core.bar
#
test_cmp_config () {
	local GD &&
	if test "$1" = "-C"
	then
		shift &&
		GD="-C $1" &&
		shift
	fi &&
	printf "%s\n" "$1" >expect.config &&
	shift &&
	git $GD config "$@" >actual.config &&
	test_cmp expect.config actual.config
}
 
# test_cmp_bin - helper to compare binary files
 
test_cmp_bin () {
	test "$#" -ne 2 && BUG "2 param"
	cmp "$@"
}
 
# Wrapper for grep which used to be used for
# GIT_TEST_GETTEXT_POISON=false. Only here as a shim for other
# in-flight changes. Should not be used and will be removed soon.
test_i18ngrep () {
	eval "last_arg=\${$#}"
 
	test -f "$last_arg" ||
	BUG "test_i18ngrep requires a file to read as the last parameter"
 
	if test $# -lt 2 ||
	   { test "x!" = "x$1" && test $# -lt 3 ; }
	then
		BUG "too few parameters to test_i18ngrep"
	fi
 
	if test "x!" = "x$1"
	then
		shift
		! grep "$@" && return 0
 
		echo >&4 "error: '! grep $@' did find a match in:"
	else
		grep "$@" && return 0
 
		echo >&4 "error: 'grep $@' didn't find a match in:"
	fi
 
	if test -s "$last_arg"
	then
		cat >&4 "$last_arg"
	else
		echo >&4 "<File '$last_arg' is empty>"
	fi
 
	return 1
}
 
# Call any command "$@" but be more verbose about its
# failure. This is handy for commands like "test" which do
# not output anything when they fail.
verbose () {
	"$@" && return 0
	echo >&4 "command failed: $(git rev-parse --sq-quote "$@")"
	return 1
}
 
# Check if the file expected to be empty is indeed empty, and barfs
# otherwise.
 
test_must_be_empty () {
	test "$#" -ne 1 && BUG "1 param"
	test_path_is_file "$1" &&
	if test -s "$1"
	then
		echo "'$1' is not empty, it contains:"
		cat "$1"
		return 1
	fi
}
 
# Tests that its two parameters refer to the same revision, or if '!' is
# provided first, that its other two parameters refer to different
# revisions.
test_cmp_rev () {
	local op='=' wrong_result=different
 
	if test $# -ge 1 && test "x$1" = 'x!'
	then
	    op='!='
	    wrong_result='the same'
	    shift
	fi
	if test $# != 2
	then
		BUG "test_cmp_rev requires two revisions, but got $#"
	else
		local r1 r2
		r1=$(git rev-parse --verify "$1") &&
		r2=$(git rev-parse --verify "$2") || return 1
 
		if ! test "$r1" "$op" "$r2"
		then
			cat >&4 <<-EOF
			error: two revisions point to $wrong_result objects:
			  '$1': $r1
			  '$2': $r2
			EOF
			return 1
		fi
	fi
}
 
# Compare paths respecting core.ignoreCase
test_cmp_fspath () {
	if test "x$1" = "x$2"
	then
		return 0
	fi
 
	if test true != "$(git config --get --type=bool core.ignorecase)"
	then
		return 1
	fi
 
	test "x$(echo "$1" | tr A-Z a-z)" =  "x$(echo "$2" | tr A-Z a-z)"
}
 
# Print a sequence of integers in increasing order, either with
# two arguments (start and end):
#
#     test_seq 1 5 -- outputs 1 2 3 4 5 one line at a time
#
# or with one argument (end), in which case it starts counting
# from 1.
 
test_seq () {
	case $# in
	1)	set 1 "$@" ;;
	2)	;;
	*)	BUG "not 1 or 2 parameters to test_seq" ;;
	esac
	test_seq_counter__=$1
	while test "$test_seq_counter__" -le "$2"
	do
		echo "$test_seq_counter__"
		test_seq_counter__=$(( $test_seq_counter__ + 1 ))
	done
}
 
# This function can be used to schedule some commands to be run
# unconditionally at the end of the test to restore sanity:
#
#	test_expect_success 'test core.capslock' '
#		git config core.capslock true &&
#		test_when_finished "git config --unset core.capslock" &&
#		hello world
#	'
#
# That would be roughly equivalent to
#
#	test_expect_success 'test core.capslock' '
#		git config core.capslock true &&
#		hello world
#		git config --unset core.capslock
#	'
#
# except that the greeting and config --unset must both succeed for
# the test to pass.
#
# Note that under --immediate mode, no clean-up is done to help diagnose
# what went wrong.
 
test_when_finished () {
	# We cannot detect when we are in a subshell in general, but by
	# doing so on Bash is better than nothing (the test will
	# silently pass on other shells).
	test "${BASH_SUBSHELL-0}" = 0 ||
	BUG "test_when_finished does nothing in a subshell"
	test_cleanup="{ $*
		} && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
}
 
# This function can be used to schedule some commands to be run
# unconditionally at the end of the test script, e.g. to stop a daemon:
#
#	test_expect_success 'test git daemon' '
#		git daemon &
#		daemon_pid=$! &&
#		test_atexit 'kill $daemon_pid' &&
#		hello world
#	'
#
# The commands will be executed before the trash directory is removed,
# i.e. the atexit commands will still be able to access any pidfiles or
# socket files.
#
# Note that these commands will be run even when a test script run
# with '--immediate' fails.  Be careful with your atexit commands to
# minimize any changes to the failed state.
 
test_atexit () {
	# We cannot detect when we are in a subshell in general, but by
	# doing so on Bash is better than nothing (the test will
	# silently pass on other shells).
	test "${BASH_SUBSHELL-0}" = 0 ||
	BUG "test_atexit does nothing in a subshell"
	test_atexit_cleanup="{ $*
		} && (exit \"\$eval_ret\"); eval_ret=\$?; $test_atexit_cleanup"
}
 
# Deprecated wrapper for "git init", use "git init" directly instead
# Usage: test_create_repo <directory>
test_create_repo () {
	git init "$@"
}
 
# This function helps on symlink challenged file systems when it is not
# important that the file system entry is a symbolic link.
# Use test_ln_s_add instead of "ln -s x y && git add y" to add a
# symbolic link entry y to the index.
 
test_ln_s_add () {
	if test_have_prereq SYMLINKS
	then
		ln -s "$1" "$2" &&
		git update-index --add "$2"
	else
		printf '%s' "$1" >"$2" &&
		ln_s_obj=$(git hash-object -w "$2") &&
		git update-index --add --cacheinfo 120000 $ln_s_obj "$2" &&
		# pick up stat info from the file
		git update-index "$2"
	fi
}
 
# This function writes out its parameters, one per line
test_write_lines () {
	printf "%s\n" "$@"
}
 
perl () {
	command "$PERL_PATH" "$@" 2>&7
} 7>&2 2>&4
 
# Given the name of an environment variable with a bool value, normalize
# its value to a 0 (true) or 1 (false or empty string) return code.
#
#   test_bool_env GIT_TEST_HTTPD <default-value>
#
# Return with code corresponding to the given default value if the variable
# is unset.
# Abort the test script if either the value of the variable or the default
# are not valid bool values.
 
test_bool_env () {
	if test $# != 2
	then
		BUG "test_bool_env requires two parameters (variable name and default value)"
	fi
 
	git env--helper --type=bool --default="$2" --exit-code "$1"
	ret=$?
	case $ret in
	0|1)	# unset or valid bool value
		;;
	*)	# invalid bool value or something unexpected
		error >&7 "test_bool_env requires bool values both for \$$1 and for the default fallback"
		;;
	esac
	return $ret
}
 
# Exit the test suite, either by skipping all remaining tests or by
# exiting with an error. If our prerequisite variable $1 falls back
# on a default assume we were opportunistically trying to set up some
# tests and we skip. If it is explicitly "true", then we report a failure.
#
# The error/skip message should be given by $2.
#
test_skip_or_die () {
	if ! test_bool_env "$1" false
	then
		skip_all=$2
		test_done
	fi
	error "$2"
}
 
# The following mingw_* functions obey POSIX shell syntax, but are actually
# bash scripts, and are meant to be used only with bash on Windows.
 
# A test_cmp function that treats LF and CRLF equal and avoids to fork
# diff when possible.
mingw_test_cmp () {
	# Read text into shell variables and compare them. If the results
	# are different, use regular diff to report the difference.
	local test_cmp_a= test_cmp_b=
 
	# When text came from stdin (one argument is '-') we must feed it
	# to diff.
	local stdin_for_diff=
 
	# Since it is difficult to detect the difference between an
	# empty input file and a failure to read the files, we go straight
	# to diff if one of the inputs is empty.
	if test -s "$1" && test -s "$2"
	then
		# regular case: both files non-empty
		mingw_read_file_strip_cr_ test_cmp_a <"$1"
		mingw_read_file_strip_cr_ test_cmp_b <"$2"
	elif test -s "$1" && test "$2" = -
	then
		# read 2nd file from stdin
		mingw_read_file_strip_cr_ test_cmp_a <"$1"
		mingw_read_file_strip_cr_ test_cmp_b
		stdin_for_diff='<<<"$test_cmp_b"'
	elif test "$1" = - && test -s "$2"
	then
		# read 1st file from stdin
		mingw_read_file_strip_cr_ test_cmp_a
		mingw_read_file_strip_cr_ test_cmp_b <"$2"
		stdin_for_diff='<<<"$test_cmp_a"'
	fi
	test -n "$test_cmp_a" &&
	test -n "$test_cmp_b" &&
	test "$test_cmp_a" = "$test_cmp_b" ||
	eval "diff -u \"\$@\" $stdin_for_diff"
}
 
# $1 is the name of the shell variable to fill in
mingw_read_file_strip_cr_ () {
	# Read line-wise using LF as the line separator
	# and use IFS to strip CR.
	local line
	while :
	do
		if IFS=$'\r' read -r -d $'\n' line
		then
			# good
			line=$line$'\n'
		else
			# we get here at EOF, but also if the last line
			# was not terminated by LF; in the latter case,
			# some text was read
			if test -z "$line"
			then
				# EOF, really
				break
			fi
		fi
		eval "$1=\$$1\$line"
	done
}
 
# Like "env FOO=BAR some-program", but run inside a subshell, which means
# it also works for shell functions (though those functions cannot impact
# the environment outside of the test_env invocation).
test_env () {
	(
		while test $# -gt 0
		do
			case "$1" in
			*=*)
				eval "${1%%=*}=\${1#*=}"
				eval "export ${1%%=*}"
				shift
				;;
			*)
				"$@" 2>&7
				exit
				;;
			esac
		done
	)
} 7>&2 2>&4
 
# Returns true if the numeric exit code in "$2" represents the expected signal
# in "$1". Signals should be given numerically.
test_match_signal () {
	if test "$2" = "$((128 + $1))"
	then
		# POSIX
		return 0
	elif test "$2" = "$((256 + $1))"
	then
		# ksh
		return 0
	fi
	return 1
}
 
# Read up to "$1" bytes (or to EOF) from stdin and write them to stdout.
test_copy_bytes () {
	perl -e '
		my $len = $ARGV[1];
		while ($len > 0) {
			my $s;
			my $nread = sysread(STDIN, $s, $len);
			die "cannot read: $!" unless defined($nread);
			last unless $nread;
			print $s;
			$len -= $nread;
		}
	' - "$1"
}
 
# run "$@" inside a non-git directory
nongit () {
	test -d non-repo ||
	mkdir non-repo ||
	return 1
 
	(
		GIT_CEILING_DIRECTORIES=$(pwd) &&
		export GIT_CEILING_DIRECTORIES &&
		cd non-repo &&
		"$@" 2>&7
	)
} 7>&2 2>&4
 
# These functions are historical wrappers around "test-tool pkt-line"
# for older tests. Use "test-tool pkt-line" itself in new tests.
packetize () {
	if test $# -gt 0
	then
		packet="$*"
		printf '%04x%s' "$((4 + ${#packet}))" "$packet"
	else
		test-tool pkt-line pack
	fi
}
 
packetize_raw () {
	test-tool pkt-line pack-raw-stdin
}
 
depacketize () {
	test-tool pkt-line unpack
}
 
# Converts base-16 data into base-8. The output is given as a sequence of
# escaped octals, suitable for consumption by 'printf'.
hex2oct () {
	perl -ne 'printf "\\%03o", hex for /../g'
}
 
# Set the hash algorithm in use to $1.  Only useful when testing the testsuite.
test_set_hash () {
	test_hash_algo="$1"
}
 
# Detect the hash algorithm in use.
test_detect_hash () {
	test_hash_algo="${GIT_TEST_DEFAULT_HASH:-sha1}"
}
 
# Load common hash metadata and common placeholder object IDs for use with
# test_oid.
test_oid_init () {
	test -n "$test_hash_algo" || test_detect_hash &&
	test_oid_cache <"$TEST_DIRECTORY/oid-info/hash-info" &&
	test_oid_cache <"$TEST_DIRECTORY/oid-info/oid"
}
 
# Load key-value pairs from stdin suitable for use with test_oid.  Blank lines
# and lines starting with "#" are ignored.  Keys must be shell identifier
# characters.
#
# Examples:
# rawsz sha1:20
# rawsz sha256:32
test_oid_cache () {
	local tag rest k v &&
 
	{ test -n "$test_hash_algo" || test_detect_hash; } &&
	while read tag rest
	do
		case $tag in
		\#*)
			continue;;
		?*)
			# non-empty
			;;
		*)
			# blank line
			continue;;
		esac &&
 
		k="${rest%:*}" &&
		v="${rest#*:}" &&
 
		if ! expr "$k" : '[a-z0-9][a-z0-9]*$' >/dev/null
		then
			BUG 'bad hash algorithm'
		fi &&
		eval "test_oid_${k}_$tag=\"\$v\""
	done
}
 
# Look up a per-hash value based on a key ($1).  The value must have been loaded
# by test_oid_init or test_oid_cache.
test_oid () {
	local algo="${test_hash_algo}" &&
 
	case "$1" in
	--hash=*)
		algo="${1#--hash=}" &&
		shift;;
	*)
		;;
	esac &&
 
	local var="test_oid_${algo}_$1" &&
 
	# If the variable is unset, we must be missing an entry for this
	# key-hash pair, so exit with an error.
	if eval "test -z \"\${$var+set}\""
	then
		BUG "undefined key '$1'"
	fi &&
	eval "printf '%s' \"\${$var}\""
}
 
# Insert a slash into an object ID so it can be used to reference a location
# under ".git/objects".  For example, "deadbeef..." becomes "de/adbeef..".
test_oid_to_path () {
	local basename=${1#??}
	echo "${1%$basename}/$basename"
}
 
# Parse oids from git ls-files --staged output
test_parse_ls_files_stage_oids () {
	awk '{print $2}' -
}
 
# Parse oids from git ls-tree output
test_parse_ls_tree_oids () {
	awk '{print $3}' -
}
 
# Choose a port number based on the test script's number and store it in
# the given variable name, unless that variable already contains a number.
test_set_port () {
	local var=$1 port
 
	if test $# -ne 1 || test -z "$var"
	then
		BUG "test_set_port requires a variable name"
	fi
 
	eval port=\$$var
	case "$port" in
	"")
		# No port is set in the given env var, use the test
		# number as port number instead.
		# Remove not only the leading 't', but all leading zeros
		# as well, so the arithmetic below won't (mis)interpret
		# a test number like '0123' as an octal value.
		port=${this_test#${this_test%%[1-9]*}}
		if test "${port:-0}" -lt 1024
		then
			# root-only port, use a larger one instead.
			port=$(($port + 10000))
		fi
		;;
	*[!0-9]*|0*)
		error >&7 "invalid port number: $port"
		;;
	*)
		# The user has specified the port.
		;;
	esac
 
	# Make sure that parallel '--stress' test jobs get different
	# ports.
	port=$(($port + ${GIT_TEST_STRESS_JOB_NR:-0}))
	eval $var=$port
}
 
# Tests for the hidden file attribute on Windows
test_path_is_hidden () {
	test_have_prereq MINGW ||
	BUG "test_path_is_hidden can only be used on Windows"
 
	# Use the output of `attrib`, ignore the absolute path
	case "$("$SYSTEMROOT"/system32/attrib "$1")" in *H*?:*) return 0;; esac
	return 1
}
 
# Check that the given command was invoked as part of the
# trace2-format trace on stdin.
#
#	test_subcommand [!] <command> <args>... < <trace>
#
# For example, to look for an invocation of "git upload-pack
# /path/to/repo"
#
#	GIT_TRACE2_EVENT=event.log git fetch ... &&
#	test_subcommand git upload-pack "$PATH" <event.log
#
# If the first parameter passed is !, this instead checks that
# the given command was not called.
#
test_subcommand () {
	local negate=
	if test "$1" = "!"
	then
		negate=t
		shift
	fi
 
	local expr=$(printf '"%s",' "$@")
	expr="${expr%,}"
 
	if test -n "$negate"
	then
		! grep "\[$expr\]"
	else
		grep "\[$expr\]"
	fi
}
 
# Check that the given command was invoked as part of the
# trace2-format trace on stdin.
#
#	test_region [!] <category> <label> git <command> <args>...
#
# For example, to look for trace2_region_enter("index", "do_read_index", repo)
# in an invocation of "git checkout HEAD~1", run
#
#	GIT_TRACE2_EVENT="$(pwd)/trace.txt" GIT_TRACE2_EVENT_NESTING=10 \
#		git checkout HEAD~1 &&
#	test_region index do_read_index <trace.txt
#
# If the first parameter passed is !, this instead checks that
# the given region was not entered.
#
test_region () {
	local expect_exit=0
	if test "$1" = "!"
	then
		expect_exit=1
		shift
	fi
 
	grep -e	'"region_enter".*"category":"'"$1"'","label":"'"$2"\" "$3"
	exitcode=$?
 
	if test $exitcode != $expect_exit
	then
		return 1
	fi
 
	grep -e	'"region_leave".*"category":"'"$1"'","label":"'"$2"\" "$3"
	exitcode=$?
 
	if test $exitcode != $expect_exit
	then
		return 1
	fi
 
	return 0
}
 
# Print the destination of symlink(s) provided as arguments. Basically
# the same as the readlink command, but it's not available everywhere.
test_readlink () {
	perl -le 'print readlink($_) for @ARGV' "$@"
}
 
# Set mtime to a fixed "magic" timestamp in mid February 2009, before we
# run an operation that may or may not touch the file.  If the file was
# touched, its timestamp will not accidentally have such an old timestamp,
# as long as your filesystem clock is reasonably correct.  To verify the
# timestamp, follow up with test_is_magic_mtime.
#
# An optional increment to the magic timestamp may be specified as second
# argument.
test_set_magic_mtime () {
	local inc=${2:-0} &&
	local mtime=$((1234567890 + $inc)) &&
	test-tool chmtime =$mtime "$1" &&
	test_is_magic_mtime "$1" $inc
}
 
# Test whether the given file has the "magic" mtime set.  This is meant to
# be used in combination with test_set_magic_mtime.
#
# An optional increment to the magic timestamp may be specified as second
# argument.  Usually, this should be the same increment which was used for
# the associated test_set_magic_mtime.
test_is_magic_mtime () {
	local inc=${2:-0} &&
	local mtime=$((1234567890 + $inc)) &&
	echo $mtime >.git/test-mtime-expect &&
	test-tool chmtime --get "$1" >.git/test-mtime-actual &&
	test_cmp .git/test-mtime-expect .git/test-mtime-actual
	local ret=$?
	rm -f .git/test-mtime-expect
	rm -f .git/test-mtime-actual
	return $ret
}