summaryrefslogtreecommitdiff
path: root/builtin/fetch.c
blob: 91f3d20696d37a4827872f735978a437e8d2b230 (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
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
/*
 * "git fetch"
 */
#include "cache.h"
#include "config.h"
#include "repository.h"
#include "refs.h"
#include "refspec.h"
#include "object-store.h"
#include "oidset.h"
#include "commit.h"
#include "builtin.h"
#include "string-list.h"
#include "remote.h"
#include "transport.h"
#include "run-command.h"
#include "parse-options.h"
#include "sigchain.h"
#include "submodule-config.h"
#include "submodule.h"
#include "connected.h"
#include "strvec.h"
#include "utf8.h"
#include "packfile.h"
#include "list-objects-filter-options.h"
#include "commit-reach.h"
#include "branch.h"
#include "promisor-remote.h"
#include "commit-graph.h"
#include "shallow.h"

#define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)

static const char * const builtin_fetch_usage[] = {
	N_("git fetch [<options>] [<repository> [<refspec>...]]"),
	N_("git fetch [<options>] <group>"),
	N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
	N_("git fetch --all [<options>]"),
	NULL
};

enum {
	TAGS_UNSET = 0,
	TAGS_DEFAULT = 1,
	TAGS_SET = 2
};

static int fetch_prune_config = -1; /* unspecified */
static int fetch_show_forced_updates = 1;
static uint64_t forced_updates_ms = 0;
static int prune = -1; /* unspecified */
#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */

static int fetch_prune_tags_config = -1; /* unspecified */
static int prune_tags = -1; /* unspecified */
#define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */

static int all, append, dry_run, force, keep, multiple, update_head_ok;
static int write_fetch_head = 1;
static int verbosity, deepen_relative, set_upstream;
static int progress = -1;
static int enable_auto_gc = 1;
static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
static int max_jobs = -1, submodule_fetch_jobs_config = -1;
static int fetch_parallel_config = 1;
static int atomic_fetch;
static enum transport_family family;
static const char *depth;
static const char *deepen_since;
static const char *upload_pack;
static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
static struct strbuf default_rla = STRBUF_INIT;
static struct transport *gtransport;
static struct transport *gsecondary;
static const char *submodule_prefix = "";
static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
static int shown_url = 0;
static struct refspec refmap = REFSPEC_INIT_FETCH;
static struct list_objects_filter_options filter_options;
static struct string_list server_options = STRING_LIST_INIT_DUP;
static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
static int fetch_write_commit_graph = -1;
static int stdin_refspecs = 0;

static int git_fetch_config(const char *k, const char *v, void *cb)
{
	if (!strcmp(k, "fetch.prune")) {
		fetch_prune_config = git_config_bool(k, v);
		return 0;
	}

	if (!strcmp(k, "fetch.prunetags")) {
		fetch_prune_tags_config = git_config_bool(k, v);
		return 0;
	}

	if (!strcmp(k, "fetch.showforcedupdates")) {
		fetch_show_forced_updates = git_config_bool(k, v);
		return 0;
	}

	if (!strcmp(k, "submodule.recurse")) {
		int r = git_config_bool(k, v) ?
			RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
		recurse_submodules = r;
	}

	if (!strcmp(k, "submodule.fetchjobs")) {
		submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
		return 0;
	} else if (!strcmp(k, "fetch.recursesubmodules")) {
		recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
		return 0;
	}

	if (!strcmp(k, "fetch.parallel")) {
		fetch_parallel_config = git_config_int(k, v);
		if (fetch_parallel_config < 0)
			die(_("fetch.parallel cannot be negative"));
		return 0;
	}

	return git_default_config(k, v, cb);
}

static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
{
	BUG_ON_OPT_NEG(unset);

	/*
	 * "git fetch --refmap='' origin foo"
	 * can be used to tell the command not to store anywhere
	 */
	refspec_append(&refmap, arg);

	return 0;
}

static struct option builtin_fetch_options[] = {
	OPT__VERBOSITY(&verbosity),
	OPT_BOOL(0, "all", &all,
		 N_("fetch from all remotes")),
	OPT_BOOL(0, "set-upstream", &set_upstream,
		 N_("set upstream for git pull/fetch")),
	OPT_BOOL('a', "append", &append,
		 N_("append to .git/FETCH_HEAD instead of overwriting")),
	OPT_BOOL(0, "atomic", &atomic_fetch,
		 N_("use atomic transaction to update references")),
	OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
		   N_("path to upload pack on remote end")),
	OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
	OPT_BOOL('m', "multiple", &multiple,
		 N_("fetch from multiple remotes")),
	OPT_SET_INT('t', "tags", &tags,
		    N_("fetch all tags and associated objects"), TAGS_SET),
	OPT_SET_INT('n', NULL, &tags,
		    N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
	OPT_INTEGER('j', "jobs", &max_jobs,
		    N_("number of submodules fetched in parallel")),
	OPT_BOOL('p', "prune", &prune,
		 N_("prune remote-tracking branches no longer on remote")),
	OPT_BOOL('P', "prune-tags", &prune_tags,
		 N_("prune local tags no longer on remote and clobber changed tags")),
	OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
		    N_("control recursive fetching of submodules"),
		    PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
	OPT_BOOL(0, "dry-run", &dry_run,
		 N_("dry run")),
	OPT_BOOL(0, "write-fetch-head", &write_fetch_head,
		 N_("write fetched references to the FETCH_HEAD file")),
	OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
	OPT_BOOL('u', "update-head-ok", &update_head_ok,
		    N_("allow updating of HEAD ref")),
	OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
	OPT_STRING(0, "depth", &depth, N_("depth"),
		   N_("deepen history of shallow clone")),
	OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
		   N_("deepen history of shallow repository based on time")),
	OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
			N_("deepen history of shallow clone, excluding rev")),
	OPT_INTEGER(0, "deepen", &deepen_relative,
		    N_("deepen history of shallow clone")),
	OPT_SET_INT_F(0, "unshallow", &unshallow,
		      N_("convert to a complete repository"),
		      1, PARSE_OPT_NONEG),
	{ OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
		   N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
	OPT_CALLBACK_F(0, "recurse-submodules-default",
		   &recurse_submodules_default, N_("on-demand"),
		   N_("default for recursive fetching of submodules "
		      "(lower priority than config files)"),
		   PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
	OPT_BOOL(0, "update-shallow", &update_shallow,
		 N_("accept refs that update .git/shallow")),
	OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
		       N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
	OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
	OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
			TRANSPORT_FAMILY_IPV4),
	OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
			TRANSPORT_FAMILY_IPV6),
	OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
			N_("report that we have only objects reachable from this object")),
	OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
	OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
		 N_("run 'maintenance --auto' after fetching")),
	OPT_BOOL(0, "auto-gc", &enable_auto_gc,
		 N_("run 'maintenance --auto' after fetching")),
	OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
		 N_("check for forced-updates on all updated branches")),
	OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
		 N_("write the commit-graph after fetching")),
	OPT_BOOL(0, "stdin", &stdin_refspecs,
		 N_("accept refspecs from stdin")),
	OPT_END()
};

static void unlock_pack(void)
{
	if (gtransport)
		transport_unlock_pack(gtransport);
	if (gsecondary)
		transport_unlock_pack(gsecondary);
}

static void unlock_pack_on_signal(int signo)
{
	unlock_pack();
	sigchain_pop(signo);
	raise(signo);
}

static void add_merge_config(struct ref **head,
			   const struct ref *remote_refs,
		           struct branch *branch,
		           struct ref ***tail)
{
	int i;

	for (i = 0; i < branch->merge_nr; i++) {
		struct ref *rm, **old_tail = *tail;
		struct refspec_item refspec;

		for (rm = *head; rm; rm = rm->next) {
			if (branch_merge_matches(branch, i, rm->name)) {
				rm->fetch_head_status = FETCH_HEAD_MERGE;
				break;
			}
		}
		if (rm)
			continue;

		/*
		 * Not fetched to a remote-tracking branch?  We need to fetch
		 * it anyway to allow this branch's "branch.$name.merge"
		 * to be honored by 'git pull', but we do not have to
		 * fail if branch.$name.merge is misconfigured to point
		 * at a nonexisting branch.  If we were indeed called by
		 * 'git pull', it will notice the misconfiguration because
		 * there is no entry in the resulting FETCH_HEAD marked
		 * for merging.
		 */
		memset(&refspec, 0, sizeof(refspec));
		refspec.src = branch->merge[i]->src;
		get_fetch_map(remote_refs, &refspec, tail, 1);
		for (rm = *old_tail; rm; rm = rm->next)
			rm->fetch_head_status = FETCH_HEAD_MERGE;
	}
}

static void create_fetch_oidset(struct ref **head, struct oidset *out)
{
	struct ref *rm = *head;
	while (rm) {
		oidset_insert(out, &rm->old_oid);
		rm = rm->next;
	}
}

struct refname_hash_entry {
	struct hashmap_entry ent;
	struct object_id oid;
	int ignore;
	char refname[FLEX_ARRAY];
};

static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
				  const struct hashmap_entry *eptr,
				  const struct hashmap_entry *entry_or_key,
				  const void *keydata)
{
	const struct refname_hash_entry *e1, *e2;

	e1 = container_of(eptr, const struct refname_hash_entry, ent);
	e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
	return strcmp(e1->refname, keydata ? keydata : e2->refname);
}

static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
						   const char *refname,
						   const struct object_id *oid)
{
	struct refname_hash_entry *ent;
	size_t len = strlen(refname);

	FLEX_ALLOC_MEM(ent, refname, refname, len);
	hashmap_entry_init(&ent->ent, strhash(refname));
	oidcpy(&ent->oid, oid);
	hashmap_add(map, &ent->ent);
	return ent;
}

static int add_one_refname(const char *refname,
			   const struct object_id *oid,
			   int flag, void *cbdata)
{
	struct hashmap *refname_map = cbdata;

	(void) refname_hash_add(refname_map, refname, oid);
	return 0;
}

static void refname_hash_init(struct hashmap *map)
{
	hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
}

static int refname_hash_exists(struct hashmap *map, const char *refname)
{
	return !!hashmap_get_from_hash(map, strhash(refname), refname);
}

static void clear_item(struct refname_hash_entry *item)
{
	item->ignore = 1;
}

static void find_non_local_tags(const struct ref *refs,
				struct ref **head,
				struct ref ***tail)
{
	struct hashmap existing_refs;
	struct hashmap remote_refs;
	struct oidset fetch_oids = OIDSET_INIT;
	struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
	struct string_list_item *remote_ref_item;
	const struct ref *ref;
	struct refname_hash_entry *item = NULL;
	const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;

	refname_hash_init(&existing_refs);
	refname_hash_init(&remote_refs);
	create_fetch_oidset(head, &fetch_oids);

	for_each_ref(add_one_refname, &existing_refs);
	for (ref = refs; ref; ref = ref->next) {
		if (!starts_with(ref->name, "refs/tags/"))
			continue;

		/*
		 * The peeled ref always follows the matching base
		 * ref, so if we see a peeled ref that we don't want
		 * to fetch then we can mark the ref entry in the list
		 * as one to ignore by setting util to NULL.
		 */
		if (ends_with(ref->name, "^{}")) {
			if (item &&
			    !has_object_file_with_flags(&ref->old_oid, quick_flags) &&
			    !oidset_contains(&fetch_oids, &ref->old_oid) &&
			    !has_object_file_with_flags(&item->oid, quick_flags) &&
			    !oidset_contains(&fetch_oids, &item->oid))
				clear_item(item);
			item = NULL;
			continue;
		}

		/*
		 * If item is non-NULL here, then we previously saw a
		 * ref not followed by a peeled reference, so we need
		 * to check if it is a lightweight tag that we want to
		 * fetch.
		 */
		if (item &&
		    !has_object_file_with_flags(&item->oid, quick_flags) &&
		    !oidset_contains(&fetch_oids, &item->oid))
			clear_item(item);

		item = NULL;

		/* skip duplicates and refs that we already have */
		if (refname_hash_exists(&remote_refs, ref->name) ||
		    refname_hash_exists(&existing_refs, ref->name))
			continue;

		item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
		string_list_insert(&remote_refs_list, ref->name);
	}
	hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);

	/*
	 * We may have a final lightweight tag that needs to be
	 * checked to see if it needs fetching.
	 */
	if (item &&
	    !has_object_file_with_flags(&item->oid, quick_flags) &&
	    !oidset_contains(&fetch_oids, &item->oid))
		clear_item(item);

	/*
	 * For all the tags in the remote_refs_list,
	 * add them to the list of refs to be fetched
	 */
	for_each_string_list_item(remote_ref_item, &remote_refs_list) {
		const char *refname = remote_ref_item->string;
		struct ref *rm;
		unsigned int hash = strhash(refname);

		item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
					struct refname_hash_entry, ent);
		if (!item)
			BUG("unseen remote ref?");

		/* Unless we have already decided to ignore this item... */
		if (item->ignore)
			continue;

		rm = alloc_ref(item->refname);
		rm->peer_ref = alloc_ref(item->refname);
		oidcpy(&rm->old_oid, &item->oid);
		**tail = rm;
		*tail = &rm->next;
	}
	hashmap_clear_and_free(&remote_refs, struct refname_hash_entry, ent);
	string_list_clear(&remote_refs_list, 0);
	oidset_clear(&fetch_oids);
}

static struct ref *get_ref_map(struct remote *remote,
			       const struct ref *remote_refs,
			       struct refspec *rs,
			       int tags, int *autotags)
{
	int i;
	struct ref *rm;
	struct ref *ref_map = NULL;
	struct ref **tail = &ref_map;

	/* opportunistically-updated references: */
	struct ref *orefs = NULL, **oref_tail = &orefs;

	struct hashmap existing_refs;
	int existing_refs_populated = 0;

	if (rs->nr) {
		struct refspec *fetch_refspec;

		for (i = 0; i < rs->nr; i++) {
			get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
			if (rs->items[i].dst && rs->items[i].dst[0])
				*autotags = 1;
		}
		/* Merge everything on the command line (but not --tags) */
		for (rm = ref_map; rm; rm = rm->next)
			rm->fetch_head_status = FETCH_HEAD_MERGE;

		/*
		 * For any refs that we happen to be fetching via
		 * command-line arguments, the destination ref might
		 * have been missing or have been different than the
		 * remote-tracking ref that would be derived from the
		 * configured refspec.  In these cases, we want to
		 * take the opportunity to update their configured
		 * remote-tracking reference.  However, we do not want
		 * to mention these entries in FETCH_HEAD at all, as
		 * they would simply be duplicates of existing
		 * entries, so we set them FETCH_HEAD_IGNORE below.
		 *
		 * We compute these entries now, based only on the
		 * refspecs specified on the command line.  But we add
		 * them to the list following the refspecs resulting
		 * from the tags option so that one of the latter,
		 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
		 * by ref_remove_duplicates() in favor of one of these
		 * opportunistic entries with FETCH_HEAD_IGNORE.
		 */
		if (refmap.nr)
			fetch_refspec = &refmap;
		else
			fetch_refspec = &remote->fetch;

		for (i = 0; i < fetch_refspec->nr; i++)
			get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
	} else if (refmap.nr) {
		die("--refmap option is only meaningful with command-line refspec(s).");
	} else {
		/* Use the defaults */
		struct branch *branch = branch_get(NULL);
		int has_merge = branch_has_merge_config(branch);
		if (remote &&
		    (remote->fetch.nr ||
		     /* Note: has_merge implies non-NULL branch->remote_name */
		     (has_merge && !strcmp(branch->remote_name, remote->name)))) {
			for (i = 0; i < remote->fetch.nr; i++) {
				get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
				if (remote->fetch.items[i].dst &&
				    remote->fetch.items[i].dst[0])
					*autotags = 1;
				if (!i && !has_merge && ref_map &&
				    !remote->fetch.items[0].pattern)
					ref_map->fetch_head_status = FETCH_HEAD_MERGE;
			}
			/*
			 * if the remote we're fetching from is the same
			 * as given in branch.<name>.remote, we add the
			 * ref given in branch.<name>.merge, too.
			 *
			 * Note: has_merge implies non-NULL branch->remote_name
			 */
			if (has_merge &&
			    !strcmp(branch->remote_name, remote->name))
				add_merge_config(&ref_map, remote_refs, branch, &tail);
		} else {
			ref_map = get_remote_ref(remote_refs, "HEAD");
			if (!ref_map)
				die(_("Couldn't find remote ref HEAD"));
			ref_map->fetch_head_status = FETCH_HEAD_MERGE;
			tail = &ref_map->next;
		}
	}

	if (tags == TAGS_SET)
		/* also fetch all tags */
		get_fetch_map(remote_refs, tag_refspec, &tail, 0);
	else if (tags == TAGS_DEFAULT && *autotags)
		find_non_local_tags(remote_refs, &ref_map, &tail);

	/* Now append any refs to be updated opportunistically: */
	*tail = orefs;
	for (rm = orefs; rm; rm = rm->next) {
		rm->fetch_head_status = FETCH_HEAD_IGNORE;
		tail = &rm->next;
	}

	/*
	 * apply negative refspecs first, before we remove duplicates. This is
	 * necessary as negative refspecs might remove an otherwise conflicting
	 * duplicate.
	 */
	if (rs->nr)
		ref_map = apply_negative_refspecs(ref_map, rs);
	else
		ref_map = apply_negative_refspecs(ref_map, &remote->fetch);

	ref_map = ref_remove_duplicates(ref_map);

	for (rm = ref_map; rm; rm = rm->next) {
		if (rm->peer_ref) {
			const char *refname = rm->peer_ref->name;
			struct refname_hash_entry *peer_item;
			unsigned int hash = strhash(refname);

			if (!existing_refs_populated) {
				refname_hash_init(&existing_refs);
				for_each_ref(add_one_refname, &existing_refs);
				existing_refs_populated = 1;
			}

			peer_item = hashmap_get_entry_from_hash(&existing_refs,
						hash, refname,
						struct refname_hash_entry, ent);
			if (peer_item) {
				struct object_id *old_oid = &peer_item->oid;
				oidcpy(&rm->peer_ref->old_oid, old_oid);
			}
		}
	}
	if (existing_refs_populated)
		hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);

	return ref_map;
}

#define STORE_REF_ERROR_OTHER 1
#define STORE_REF_ERROR_DF_CONFLICT 2

static int s_update_ref(const char *action,
			struct ref *ref,
			struct ref_transaction *transaction,
			int check_old)
{
	char *msg;
	char *rla = getenv("GIT_REFLOG_ACTION");
	struct ref_transaction *our_transaction = NULL;
	struct strbuf err = STRBUF_INIT;
	int ret;

	if (dry_run)
		return 0;
	if (!rla)
		rla = default_rla.buf;
	msg = xstrfmt("%s: %s", rla, action);

	/*
	 * If no transaction was passed to us, we manage the transaction
	 * ourselves. Otherwise, we trust the caller to handle the transaction
	 * lifecycle.
	 */
	if (!transaction) {
		transaction = our_transaction = ref_transaction_begin(&err);
		if (!transaction) {
			ret = STORE_REF_ERROR_OTHER;
			goto out;
		}
	}

	ret = ref_transaction_update(transaction, ref->name, &ref->new_oid,
				     check_old ? &ref->old_oid : NULL,
				     0, msg, &err);
	if (ret) {
		ret = STORE_REF_ERROR_OTHER;
		goto out;
	}

	if (our_transaction) {
		switch (ref_transaction_commit(our_transaction, &err)) {
		case 0:
			break;
		case TRANSACTION_NAME_CONFLICT:
			ret = STORE_REF_ERROR_DF_CONFLICT;
			goto out;
		default:
			ret = STORE_REF_ERROR_OTHER;
			goto out;
		}
	}

out:
	ref_transaction_free(our_transaction);
	if (ret)
		error("%s", err.buf);
	strbuf_release(&err);
	free(msg);
	return ret;
}

static int refcol_width = 10;
static int compact_format;

static void adjust_refcol_width(const struct ref *ref)
{
	int max, rlen, llen, len;

	/* uptodate lines are only shown on high verbosity level */
	if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
		return;

	max    = term_columns();
	rlen   = utf8_strwidth(prettify_refname(ref->name));

	llen   = utf8_strwidth(prettify_refname(ref->peer_ref->name));

	/*
	 * rough estimation to see if the output line is too long and
	 * should not be counted (we can't do precise calculation
	 * anyway because we don't know if the error explanation part
	 * will be printed in update_local_ref)
	 */
	if (compact_format) {
		llen = 0;
		max = max * 2 / 3;
	}
	len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
	if (len >= max)
		return;

	/*
	 * Not precise calculation for compact mode because '*' can
	 * appear on the left hand side of '->' and shrink the column
	 * back.
	 */
	if (refcol_width < rlen)
		refcol_width = rlen;
}

static void prepare_format_display(struct ref *ref_map)
{
	struct ref *rm;
	const char *format = "full";

	git_config_get_string_tmp("fetch.output", &format);
	if (!strcasecmp(format, "full"))
		compact_format = 0;
	else if (!strcasecmp(format, "compact"))
		compact_format = 1;
	else
		die(_("configuration fetch.output contains invalid value %s"),
		    format);

	for (rm = ref_map; rm; rm = rm->next) {
		if (rm->status == REF_STATUS_REJECT_SHALLOW ||
		    !rm->peer_ref ||
		    !strcmp(rm->name, "HEAD"))
			continue;

		adjust_refcol_width(rm);
	}
}

static void print_remote_to_local(struct strbuf *display,
				  const char *remote, const char *local)
{
	strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
}

static int find_and_replace(struct strbuf *haystack,
			    const char *needle,
			    const char *placeholder)
{
	const char *p = NULL;
	int plen, nlen;

	nlen = strlen(needle);
	if (ends_with(haystack->buf, needle))
		p = haystack->buf + haystack->len - nlen;
	else
		p = strstr(haystack->buf, needle);
	if (!p)
		return 0;

	if (p > haystack->buf && p[-1] != '/')
		return 0;

	plen = strlen(p);
	if (plen > nlen && p[nlen] != '/')
		return 0;

	strbuf_splice(haystack, p - haystack->buf, nlen,
		      placeholder, strlen(placeholder));
	return 1;
}

static void print_compact(struct strbuf *display,
			  const char *remote, const char *local)
{
	struct strbuf r = STRBUF_INIT;
	struct strbuf l = STRBUF_INIT;

	if (!strcmp(remote, local)) {
		strbuf_addf(display, "%-*s -> *", refcol_width, remote);
		return;
	}

	strbuf_addstr(&r, remote);
	strbuf_addstr(&l, local);

	if (!find_and_replace(&r, local, "*"))
		find_and_replace(&l, remote, "*");
	print_remote_to_local(display, r.buf, l.buf);

	strbuf_release(&r);
	strbuf_release(&l);
}

static void format_display(struct strbuf *display, char code,
			   const char *summary, const char *error,
			   const char *remote, const char *local,
			   int summary_width)
{
	int width = (summary_width + strlen(summary) - gettext_width(summary));

	strbuf_addf(display, "%c %-*s ", code, width, summary);
	if (!compact_format)
		print_remote_to_local(display, remote, local);
	else
		print_compact(display, remote, local);
	if (error)
		strbuf_addf(display, "  (%s)", error);
}

static int update_local_ref(struct ref *ref,
			    struct ref_transaction *transaction,
			    const char *remote,
			    const struct ref *remote_ref,
			    struct strbuf *display,
			    int summary_width)
{
	struct commit *current = NULL, *updated;
	enum object_type type;
	struct branch *current_branch = branch_get(NULL);
	const char *pretty_ref = prettify_refname(ref->name);
	int fast_forward = 0;

	type = oid_object_info(the_repository, &ref->new_oid, NULL);
	if (type < 0)
		die(_("object %s not found"), oid_to_hex(&ref->new_oid));

	if (oideq(&ref->old_oid, &ref->new_oid)) {
		if (verbosity > 0)
			format_display(display, '=', _("[up to date]"), NULL,
				       remote, pretty_ref, summary_width);
		return 0;
	}

	if (current_branch &&
	    !strcmp(ref->name, current_branch->name) &&
	    !(update_head_ok || is_bare_repository()) &&
	    !is_null_oid(&ref->old_oid)) {
		/*
		 * If this is the head, and it's not okay to update
		 * the head, and the old value of the head isn't empty...
		 */
		format_display(display, '!', _("[rejected]"),
			       _("can't fetch in current branch"),
			       remote, pretty_ref, summary_width);
		return 1;
	}

	if (!is_null_oid(&ref->old_oid) &&
	    starts_with(ref->name, "refs/tags/")) {
		if (force || ref->force) {
			int r;
			r = s_update_ref("updating tag", ref, transaction, 0);
			format_display(display, r ? '!' : 't', _("[tag update]"),
				       r ? _("unable to update local ref") : NULL,
				       remote, pretty_ref, summary_width);
			return r;
		} else {
			format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
				       remote, pretty_ref, summary_width);
			return 1;
		}
	}

	current = lookup_commit_reference_gently(the_repository,
						 &ref->old_oid, 1);
	updated = lookup_commit_reference_gently(the_repository,
						 &ref->new_oid, 1);
	if (!current || !updated) {
		const char *msg;
		const char *what;
		int r;
		/*
		 * Nicely describe the new ref we're fetching.
		 * Base this on the remote's ref name, as it's
		 * more likely to follow a standard layout.
		 */
		const char *name = remote_ref ? remote_ref->name : "";
		if (starts_with(name, "refs/tags/")) {
			msg = "storing tag";
			what = _("[new tag]");
		} else if (starts_with(name, "refs/heads/")) {
			msg = "storing head";
			what = _("[new branch]");
		} else {
			msg = "storing ref";
			what = _("[new ref]");
		}

		r = s_update_ref(msg, ref, transaction, 0);
		format_display(display, r ? '!' : '*', what,
			       r ? _("unable to update local ref") : NULL,
			       remote, pretty_ref, summary_width);
		return r;
	}

	if (fetch_show_forced_updates) {
		uint64_t t_before = getnanotime();
		fast_forward = in_merge_bases(current, updated);
		forced_updates_ms += (getnanotime() - t_before) / 1000000;
	} else {
		fast_forward = 1;
	}

	if (fast_forward) {
		struct strbuf quickref = STRBUF_INIT;
		int r;

		strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
		strbuf_addstr(&quickref, "..");
		strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
		r = s_update_ref("fast-forward", ref, transaction, 1);
		format_display(display, r ? '!' : ' ', quickref.buf,
			       r ? _("unable to update local ref") : NULL,
			       remote, pretty_ref, summary_width);
		strbuf_release(&quickref);
		return r;
	} else if (force || ref->force) {
		struct strbuf quickref = STRBUF_INIT;
		int r;
		strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
		strbuf_addstr(&quickref, "...");
		strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
		r = s_update_ref("forced-update", ref, transaction, 1);
		format_display(display, r ? '!' : '+', quickref.buf,
			       r ? _("unable to update local ref") : _("forced update"),
			       remote, pretty_ref, summary_width);
		strbuf_release(&quickref);
		return r;
	} else {
		format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
			       remote, pretty_ref, summary_width);
		return 1;
	}
}

static int iterate_ref_map(void *cb_data, struct object_id *oid)
{
	struct ref **rm = cb_data;
	struct ref *ref = *rm;

	while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
		ref = ref->next;
	if (!ref)
		return -1; /* end of the list */
	*rm = ref->next;
	oidcpy(oid, &ref->old_oid);
	return 0;
}

struct fetch_head {
	FILE *fp;
	struct strbuf buf;
};

static int open_fetch_head(struct fetch_head *fetch_head)
{
	const char *filename = git_path_fetch_head(the_repository);

	if (write_fetch_head) {
		fetch_head->fp = fopen(filename, "a");
		if (!fetch_head->fp)
			return error_errno(_("cannot open %s"), filename);
		strbuf_init(&fetch_head->buf, 0);
	} else {
		fetch_head->fp = NULL;
	}

	return 0;
}

static void append_fetch_head(struct fetch_head *fetch_head,
			      const struct object_id *old_oid,
			      enum fetch_head_status fetch_head_status,
			      const char *note,
			      const char *url, size_t url_len)
{
	char old_oid_hex[GIT_MAX_HEXSZ + 1];
	const char *merge_status_marker;
	size_t i;

	if (!fetch_head->fp)
		return;

	switch (fetch_head_status) {
	case FETCH_HEAD_NOT_FOR_MERGE:
		merge_status_marker = "not-for-merge";
		break;
	case FETCH_HEAD_MERGE:
		merge_status_marker = "";
		break;
	default:
		/* do not write anything to FETCH_HEAD */
		return;
	}

	strbuf_addf(&fetch_head->buf, "%s\t%s\t%s",
		    oid_to_hex_r(old_oid_hex, old_oid), merge_status_marker, note);
	for (i = 0; i < url_len; ++i)
		if ('\n' == url[i])
			strbuf_addstr(&fetch_head->buf, "\\n");
		else
			strbuf_addch(&fetch_head->buf, url[i]);
	strbuf_addch(&fetch_head->buf, '\n');

	/*
	 * When using an atomic fetch, we do not want to update FETCH_HEAD if
	 * any of the reference updates fails. We thus have to write all
	 * updates to a buffer first and only commit it as soon as all
	 * references have been successfully updated.
	 */
	if (!atomic_fetch) {
		strbuf_write(&fetch_head->buf, fetch_head->fp);
		strbuf_reset(&fetch_head->buf);
	}
}

static void commit_fetch_head(struct fetch_head *fetch_head)
{
	if (!fetch_head->fp || !atomic_fetch)
		return;
	strbuf_write(&fetch_head->buf, fetch_head->fp);
}

static void close_fetch_head(struct fetch_head *fetch_head)
{
	if (!fetch_head->fp)
		return;

	fclose(fetch_head->fp);
	strbuf_release(&fetch_head->buf);
}

static const char warn_show_forced_updates[] =
N_("Fetch normally indicates which branches had a forced update,\n"
   "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
   "flag or run 'git config fetch.showForcedUpdates true'.");
static const char warn_time_show_forced_updates[] =
N_("It took %.2f seconds to check forced updates. You can use\n"
   "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
   " to avoid this check.\n");

static int store_updated_refs(const char *raw_url, const char *remote_name,
			      int connectivity_checked, struct ref *ref_map)
{
	struct fetch_head fetch_head;
	struct commit *commit;
	int url_len, i, rc = 0;
	struct strbuf note = STRBUF_INIT, err = STRBUF_INIT;
	struct ref_transaction *transaction = NULL;
	const char *what, *kind;
	struct ref *rm;
	char *url;
	int want_status;
	int summary_width = transport_summary_width(ref_map);

	rc = open_fetch_head(&fetch_head);
	if (rc)
		return -1;

	if (raw_url)
		url = transport_anonymize_url(raw_url);
	else
		url = xstrdup("foreign");

	if (!connectivity_checked) {
		struct check_connected_options opt = CHECK_CONNECTED_INIT;

		rm = ref_map;
		if (check_connected(iterate_ref_map, &rm, &opt)) {
			rc = error(_("%s did not send all necessary objects\n"), url);
			goto abort;
		}
	}

	if (atomic_fetch) {
		transaction = ref_transaction_begin(&err);
		if (!transaction) {
			error("%s", err.buf);
			goto abort;
		}
	}

	prepare_format_display(ref_map);

	/*
	 * We do a pass for each fetch_head_status type in their enum order, so
	 * merged entries are written before not-for-merge. That lets readers
	 * use FETCH_HEAD as a refname to refer to the ref to be merged.
	 */
	for (want_status = FETCH_HEAD_MERGE;
	     want_status <= FETCH_HEAD_IGNORE;
	     want_status++) {
		for (rm = ref_map; rm; rm = rm->next) {
			struct ref *ref = NULL;

			if (rm->status == REF_STATUS_REJECT_SHALLOW) {
				if (want_status == FETCH_HEAD_MERGE)
					warning(_("reject %s because shallow roots are not allowed to be updated"),
						rm->peer_ref ? rm->peer_ref->name : rm->name);
				continue;
			}

			commit = lookup_commit_reference_gently(the_repository,
								&rm->old_oid,
								1);
			if (!commit)
				rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;

			if (rm->fetch_head_status != want_status)
				continue;

			if (rm->peer_ref) {
				ref = alloc_ref(rm->peer_ref->name);
				oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
				oidcpy(&ref->new_oid, &rm->old_oid);
				ref->force = rm->peer_ref->force;
			}

			if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
			    (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
				check_for_new_submodule_commits(&rm->old_oid);
			}

			if (!strcmp(rm->name, "HEAD")) {
				kind = "";
				what = "";
			}
			else if (skip_prefix(rm->name, "refs/heads/", &what))
				kind = "branch";
			else if (skip_prefix(rm->name, "refs/tags/", &what))
				kind = "tag";
			else if (skip_prefix(rm->name, "refs/remotes/", &what))
				kind = "remote-tracking branch";
			else {
				kind = "";
				what = rm->name;
			}

			url_len = strlen(url);
			for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
				;
			url_len = i + 1;
			if (4 < i && !strncmp(".git", url + i - 3, 4))
				url_len = i - 3;

			strbuf_reset(&note);
			if (*what) {
				if (*kind)
					strbuf_addf(&note, "%s ", kind);
				strbuf_addf(&note, "'%s' of ", what);
			}

			append_fetch_head(&fetch_head, &rm->old_oid,
					  rm->fetch_head_status,
					  note.buf, url, url_len);

			strbuf_reset(&note);
			if (ref) {
				rc |= update_local_ref(ref, transaction, what,
						       rm, &note, summary_width);
				free(ref);
			} else if (write_fetch_head || dry_run) {
				/*
				 * Display fetches written to FETCH_HEAD (or
				 * would be written to FETCH_HEAD, if --dry-run
				 * is set).
				 */
				format_display(&note, '*',
					       *kind ? kind : "branch", NULL,
					       *what ? what : "HEAD",
					       "FETCH_HEAD", summary_width);
			}
			if (note.len) {
				if (verbosity >= 0 && !shown_url) {
					fprintf(stderr, _("From %.*s\n"),
							url_len, url);
					shown_url = 1;
				}
				if (verbosity >= 0)
					fprintf(stderr, " %s\n", note.buf);
			}
		}
	}

	if (!rc && transaction) {
		rc = ref_transaction_commit(transaction, &err);
		if (rc) {
			error("%s", err.buf);
			goto abort;
		}
	}

	if (!rc)
		commit_fetch_head(&fetch_head);

	if (rc & STORE_REF_ERROR_DF_CONFLICT)
		error(_("some local refs could not be updated; try running\n"
		      " 'git remote prune %s' to remove any old, conflicting "
		      "branches"), remote_name);

	if (advice_fetch_show_forced_updates) {
		if (!fetch_show_forced_updates) {
			warning(_(warn_show_forced_updates));
		} else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
			warning(_(warn_time_show_forced_updates),
				forced_updates_ms / 1000.0);
		}
	}

 abort:
	strbuf_release(&note);
	strbuf_release(&err);
	ref_transaction_free(transaction);
	free(url);
	close_fetch_head(&fetch_head);
	return rc;
}

/*
 * We would want to bypass the object transfer altogether if
 * everything we are going to fetch already exists and is connected
 * locally.
 */
static int check_exist_and_connected(struct ref *ref_map)
{
	struct ref *rm = ref_map;
	struct check_connected_options opt = CHECK_CONNECTED_INIT;
	struct ref *r;

	/*
	 * If we are deepening a shallow clone we already have these
	 * objects reachable.  Running rev-list here will return with
	 * a good (0) exit status and we'll bypass the fetch that we
	 * really need to perform.  Claiming failure now will ensure
	 * we perform the network exchange to deepen our history.
	 */
	if (deepen)
		return -1;

	/*
	 * check_connected() allows objects to merely be promised, but
	 * we need all direct targets to exist.
	 */
	for (r = rm; r; r = r->next) {
		if (!has_object_file_with_flags(&r->old_oid,
						OBJECT_INFO_SKIP_FETCH_OBJECT))
			return -1;
	}

	opt.quiet = 1;
	return check_connected(iterate_ref_map, &rm, &opt);
}

static int fetch_refs(struct transport *transport, struct ref *ref_map)
{
	int ret = check_exist_and_connected(ref_map);
	if (ret) {
		trace2_region_enter("fetch", "fetch_refs", the_repository);
		ret = transport_fetch_refs(transport, ref_map);
		trace2_region_leave("fetch", "fetch_refs", the_repository);
	}
	if (!ret)
		/*
		 * Keep the new pack's ".keep" file around to allow the caller
		 * time to update refs to reference the new objects.
		 */
		return 0;
	transport_unlock_pack(transport);
	return ret;
}

/* Update local refs based on the ref values fetched from a remote */
static int consume_refs(struct transport *transport, struct ref *ref_map)
{
	int connectivity_checked = transport->smart_options
		? transport->smart_options->connectivity_checked : 0;
	int ret;
	trace2_region_enter("fetch", "consume_refs", the_repository);
	ret = store_updated_refs(transport->url,
				 transport->remote->name,
				 connectivity_checked,
				 ref_map);
	transport_unlock_pack(transport);
	trace2_region_leave("fetch", "consume_refs", the_repository);
	return ret;
}

static int prune_refs(struct refspec *rs, struct ref *ref_map,
		      const char *raw_url)
{
	int url_len, i, result = 0;
	struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
	char *url;
	int summary_width = transport_summary_width(stale_refs);
	const char *dangling_msg = dry_run
		? _("   (%s will become dangling)")
		: _("   (%s has become dangling)");

	if (raw_url)
		url = transport_anonymize_url(raw_url);
	else
		url = xstrdup("foreign");

	url_len = strlen(url);
	for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
		;

	url_len = i + 1;
	if (4 < i && !strncmp(".git", url + i - 3, 4))
		url_len = i - 3;

	if (!dry_run) {
		struct string_list refnames = STRING_LIST_INIT_NODUP;

		for (ref = stale_refs; ref; ref = ref->next)
			string_list_append(&refnames, ref->name);

		result = delete_refs("fetch: prune", &refnames, 0);
		string_list_clear(&refnames, 0);
	}

	if (verbosity >= 0) {
		for (ref = stale_refs; ref; ref = ref->next) {
			struct strbuf sb = STRBUF_INIT;
			if (!shown_url) {
				fprintf(stderr, _("From %.*s\n"), url_len, url);
				shown_url = 1;
			}
			format_display(&sb, '-', _("[deleted]"), NULL,
				       _("(none)"), prettify_refname(ref->name),
				       summary_width);
			fprintf(stderr, " %s\n",sb.buf);
			strbuf_release(&sb);
			warn_dangling_symref(stderr, dangling_msg, ref->name);
		}
	}

	free(url);
	free_refs(stale_refs);
	return result;
}

static void check_not_current_branch(struct ref *ref_map)
{
	struct branch *current_branch = branch_get(NULL);

	if (is_bare_repository() || !current_branch)
		return;

	for (; ref_map; ref_map = ref_map->next)
		if (ref_map->peer_ref && !strcmp(current_branch->refname,
					ref_map->peer_ref->name))
			die(_("Refusing to fetch into current branch %s "
			    "of non-bare repository"), current_branch->refname);
}

static int truncate_fetch_head(void)
{
	const char *filename = git_path_fetch_head(the_repository);
	FILE *fp = fopen_for_writing(filename);

	if (!fp)
		return error_errno(_("cannot open %s"), filename);
	fclose(fp);
	return 0;
}

static void set_option(struct transport *transport, const char *name, const char *value)
{
	int r = transport_set_option(transport, name, value);
	if (r < 0)
		die(_("Option \"%s\" value \"%s\" is not valid for %s"),
		    name, value, transport->url);
	if (r > 0)
		warning(_("Option \"%s\" is ignored for %s\n"),
			name, transport->url);
}


static int add_oid(const char *refname, const struct object_id *oid, int flags,
		   void *cb_data)
{
	struct oid_array *oids = cb_data;

	oid_array_append(oids, oid);
	return 0;
}

static void add_negotiation_tips(struct git_transport_options *smart_options)
{
	struct oid_array *oids = xcalloc(1, sizeof(*oids));
	int i;

	for (i = 0; i < negotiation_tip.nr; i++) {
		const char *s = negotiation_tip.items[i].string;
		int old_nr;
		if (!has_glob_specials(s)) {
			struct object_id oid;
			if (get_oid(s, &oid))
				die("%s is not a valid object", s);
			oid_array_append(oids, &oid);
			continue;
		}
		old_nr = oids->nr;
		for_each_glob_ref(add_oid, s, oids);
		if (old_nr == oids->nr)
			warning("Ignoring --negotiation-tip=%s because it does not match any refs",
				s);
	}
	smart_options->negotiation_tips = oids;
}

static struct transport *prepare_transport(struct remote *remote, int deepen)
{
	struct transport *transport;

	transport = transport_get(remote, NULL);
	transport_set_verbosity(transport, verbosity, progress);
	transport->family = family;
	if (upload_pack)
		set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
	if (keep)
		set_option(transport, TRANS_OPT_KEEP, "yes");
	if (depth)
		set_option(transport, TRANS_OPT_DEPTH, depth);
	if (deepen && deepen_since)
		set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
	if (deepen && deepen_not.nr)
		set_option(transport, TRANS_OPT_DEEPEN_NOT,
			   (const char *)&deepen_not);
	if (deepen_relative)
		set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
	if (update_shallow)
		set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
	if (filter_options.choice) {
		const char *spec =
			expand_list_objects_filter_spec(&filter_options);
		set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
		set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
	}
	if (negotiation_tip.nr) {
		if (transport->smart_options)
			add_negotiation_tips(transport->smart_options);
		else
			warning("Ignoring --negotiation-tip because the protocol does not support it.");
	}
	return transport;
}

static void backfill_tags(struct transport *transport, struct ref *ref_map)
{
	int cannot_reuse;

	/*
	 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
	 * when remote helper is used (setting it to an empty string
	 * is not unsetting). We could extend the remote helper
	 * protocol for that, but for now, just force a new connection
	 * without deepen-since. Similar story for deepen-not.
	 */
	cannot_reuse = transport->cannot_reuse ||
		deepen_since || deepen_not.nr;
	if (cannot_reuse) {
		gsecondary = prepare_transport(transport->remote, 0);
		transport = gsecondary;
	}

	transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
	transport_set_option(transport, TRANS_OPT_DEPTH, "0");
	transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
	if (!fetch_refs(transport, ref_map))
		consume_refs(transport, ref_map);

	if (gsecondary) {
		transport_disconnect(gsecondary);
		gsecondary = NULL;
	}
}

static int do_fetch(struct transport *transport,
		    struct refspec *rs)
{
	struct ref *ref_map;
	int autotags = (transport->remote->fetch_tags == 1);
	int retcode = 0;
	const struct ref *remote_refs;
	struct strvec ref_prefixes = STRVEC_INIT;
	int must_list_refs = 1;

	if (tags == TAGS_DEFAULT) {
		if (transport->remote->fetch_tags == 2)
			tags = TAGS_SET;
		if (transport->remote->fetch_tags == -1)
			tags = TAGS_UNSET;
	}

	/* if not appending, truncate FETCH_HEAD */
	if (!append && write_fetch_head) {
		retcode = truncate_fetch_head();
		if (retcode)
			goto cleanup;
	}

	if (rs->nr) {
		int i;

		refspec_ref_prefixes(rs, &ref_prefixes);

		/*
		 * We can avoid listing refs if all of them are exact
		 * OIDs
		 */
		must_list_refs = 0;
		for (i = 0; i < rs->nr; i++) {
			if (!rs->items[i].exact_sha1) {
				must_list_refs = 1;
				break;
			}
		}
	} else if (transport->remote && transport->remote->fetch.nr)
		refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);

	if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
		must_list_refs = 1;
		if (ref_prefixes.nr)
			strvec_push(&ref_prefixes, "refs/tags/");
	}

	if (must_list_refs) {
		trace2_region_enter("fetch", "remote_refs", the_repository);
		remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
		trace2_region_leave("fetch", "remote_refs", the_repository);
	} else
		remote_refs = NULL;

	strvec_clear(&ref_prefixes);

	ref_map = get_ref_map(transport->remote, remote_refs, rs,
			      tags, &autotags);
	if (!update_head_ok)
		check_not_current_branch(ref_map);

	if (tags == TAGS_DEFAULT && autotags)
		transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
	if (prune) {
		/*
		 * We only prune based on refspecs specified
		 * explicitly (via command line or configuration); we
		 * don't care whether --tags was specified.
		 */
		if (rs->nr) {
			prune_refs(rs, ref_map, transport->url);
		} else {
			prune_refs(&transport->remote->fetch,
				   ref_map,
				   transport->url);
		}
	}
	if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
		free_refs(ref_map);
		retcode = 1;
		goto cleanup;
	}

	if (set_upstream) {
		struct branch *branch = branch_get("HEAD");
		struct ref *rm;
		struct ref *source_ref = NULL;

		/*
		 * We're setting the upstream configuration for the
		 * current branch. The relevant upstream is the
		 * fetched branch that is meant to be merged with the
		 * current one, i.e. the one fetched to FETCH_HEAD.
		 *
		 * When there are several such branches, consider the
		 * request ambiguous and err on the safe side by doing
		 * nothing and just emit a warning.
		 */
		for (rm = ref_map; rm; rm = rm->next) {
			if (!rm->peer_ref) {
				if (source_ref) {
					warning(_("multiple branches detected, incompatible with --set-upstream"));
					goto skip;
				} else {
					source_ref = rm;
				}
			}
		}
		if (source_ref) {
			if (!strcmp(source_ref->name, "HEAD") ||
			    starts_with(source_ref->name, "refs/heads/"))
				install_branch_config(0,
						      branch->name,
						      transport->remote->name,
						      source_ref->name);
			else if (starts_with(source_ref->name, "refs/remotes/"))
				warning(_("not setting upstream for a remote remote-tracking branch"));
			else if (starts_with(source_ref->name, "refs/tags/"))
				warning(_("not setting upstream for a remote tag"));
			else
				warning(_("unknown branch type"));
		} else {
			warning(_("no source branch found.\n"
				"you need to specify exactly one branch with the --set-upstream option."));
		}
	}
 skip:
	free_refs(ref_map);

	/* if neither --no-tags nor --tags was specified, do automated tag
	 * following ... */
	if (tags == TAGS_DEFAULT && autotags) {
		struct ref **tail = &ref_map;
		ref_map = NULL;
		find_non_local_tags(remote_refs, &ref_map, &tail);
		if (ref_map)
			backfill_tags(transport, ref_map);
		free_refs(ref_map);
	}

 cleanup:
	return retcode;
}

static int get_one_remote_for_fetch(struct remote *remote, void *priv)
{
	struct string_list *list = priv;
	if (!remote->skip_default_update)
		string_list_append(list, remote->name);
	return 0;
}

struct remote_group_data {
	const char *name;
	struct string_list *list;
};

static int get_remote_group(const char *key, const char *value, void *priv)
{
	struct remote_group_data *g = priv;

	if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
		/* split list by white space */
		while (*value) {
			size_t wordlen = strcspn(value, " \t\n");

			if (wordlen >= 1)
				string_list_append_nodup(g->list,
						   xstrndup(value, wordlen));
			value += wordlen + (value[wordlen] != '\0');
		}
	}

	return 0;
}

static int add_remote_or_group(const char *name, struct string_list *list)
{
	int prev_nr = list->nr;
	struct remote_group_data g;
	g.name = name; g.list = list;

	git_config(get_remote_group, &g);
	if (list->nr == prev_nr) {
		struct remote *remote = remote_get(name);
		if (!remote_is_configured(remote, 0))
			return 0;
		string_list_append(list, remote->name);
	}
	return 1;
}

static void add_options_to_argv(struct strvec *argv)
{
	if (dry_run)
		strvec_push(argv, "--dry-run");
	if (prune != -1)
		strvec_push(argv, prune ? "--prune" : "--no-prune");
	if (prune_tags != -1)
		strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
	if (update_head_ok)
		strvec_push(argv, "--update-head-ok");
	if (force)
		strvec_push(argv, "--force");
	if (keep)
		strvec_push(argv, "--keep");
	if (recurse_submodules == RECURSE_SUBMODULES_ON)
		strvec_push(argv, "--recurse-submodules");
	else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
		strvec_push(argv, "--recurse-submodules=on-demand");
	if (tags == TAGS_SET)
		strvec_push(argv, "--tags");
	else if (tags == TAGS_UNSET)
		strvec_push(argv, "--no-tags");
	if (verbosity >= 2)
		strvec_push(argv, "-v");
	if (verbosity >= 1)
		strvec_push(argv, "-v");
	else if (verbosity < 0)
		strvec_push(argv, "-q");
	if (family == TRANSPORT_FAMILY_IPV4)
		strvec_push(argv, "--ipv4");
	else if (family == TRANSPORT_FAMILY_IPV6)
		strvec_push(argv, "--ipv6");
}

/* Fetch multiple remotes in parallel */

struct parallel_fetch_state {
	const char **argv;
	struct string_list *remotes;
	int next, result;
};

static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
			     void *cb, void **task_cb)
{
	struct parallel_fetch_state *state = cb;
	char *remote;

	if (state->next < 0 || state->next >= state->remotes->nr)
		return 0;

	remote = state->remotes->items[state->next++].string;
	*task_cb = remote;

	strvec_pushv(&cp->args, state->argv);
	strvec_push(&cp->args, remote);
	cp->git_cmd = 1;

	if (verbosity >= 0)
		printf(_("Fetching %s\n"), remote);

	return 1;
}

static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
{
	struct parallel_fetch_state *state = cb;
	const char *remote = task_cb;

	state->result = error(_("Could not fetch %s"), remote);

	return 0;
}

static int fetch_finished(int result, struct strbuf *out,
			  void *cb, void *task_cb)
{
	struct parallel_fetch_state *state = cb;
	const char *remote = task_cb;

	if (result) {
		strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
			    remote, result);
		state->result = -1;
	}

	return 0;
}

static int fetch_multiple(struct string_list *list, int max_children)
{
	int i, result = 0;
	struct strvec argv = STRVEC_INIT;

	if (!append && write_fetch_head) {
		int errcode = truncate_fetch_head();
		if (errcode)
			return errcode;
	}

	strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
		     "--no-write-commit-graph", NULL);
	add_options_to_argv(&argv);

	if (max_children != 1 && list->nr != 1) {
		struct parallel_fetch_state state = { argv.v, list, 0, 0 };

		strvec_push(&argv, "--end-of-options");
		result = run_processes_parallel_tr2(max_children,
						    &fetch_next_remote,
						    &fetch_failed_to_start,
						    &fetch_finished,
						    &state,
						    "fetch", "parallel/fetch");

		if (!result)
			result = state.result;
	} else
		for (i = 0; i < list->nr; i++) {
			const char *name = list->items[i].string;
			strvec_push(&argv, name);
			if (verbosity >= 0)
				printf(_("Fetching %s\n"), name);
			if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
				error(_("Could not fetch %s"), name);
				result = 1;
			}
			strvec_pop(&argv);
		}

	strvec_clear(&argv);
	return !!result;
}

/*
 * Fetching from the promisor remote should use the given filter-spec
 * or inherit the default filter-spec from the config.
 */
static inline void fetch_one_setup_partial(struct remote *remote)
{
	/*
	 * Explicit --no-filter argument overrides everything, regardless
	 * of any prior partial clones and fetches.
	 */
	if (filter_options.no_filter)
		return;

	/*
	 * If no prior partial clone/fetch and the current fetch DID NOT
	 * request a partial-fetch, do a normal fetch.
	 */
	if (!has_promisor_remote() && !filter_options.choice)
		return;

	/*
	 * If this is a partial-fetch request, we enable partial on
	 * this repo if not already enabled and remember the given
	 * filter-spec as the default for subsequent fetches to this
	 * remote if there is currently no default filter-spec.
	 */
	if (filter_options.choice) {
		partial_clone_register(remote->name, &filter_options);
		return;
	}

	/*
	 * Do a partial-fetch from the promisor remote using either the
	 * explicitly given filter-spec or inherit the filter-spec from
	 * the config.
	 */
	if (!filter_options.choice)
		partial_clone_get_default_filter_spec(&filter_options, remote->name);
	return;
}

static int fetch_one(struct remote *remote, int argc, const char **argv,
		     int prune_tags_ok, int use_stdin_refspecs)
{
	struct refspec rs = REFSPEC_INIT_FETCH;
	int i;
	int exit_code;
	int maybe_prune_tags;
	int remote_via_config = remote_is_configured(remote, 0);

	if (!remote)
		die(_("No remote repository specified.  Please, specify either a URL or a\n"
		    "remote name from which new revisions should be fetched."));

	gtransport = prepare_transport(remote, 1);

	if (prune < 0) {
		/* no command line request */
		if (0 <= remote->prune)
			prune = remote->prune;
		else if (0 <= fetch_prune_config)
			prune = fetch_prune_config;
		else
			prune = PRUNE_BY_DEFAULT;
	}

	if (prune_tags < 0) {
		/* no command line request */
		if (0 <= remote->prune_tags)
			prune_tags = remote->prune_tags;
		else if (0 <= fetch_prune_tags_config)
			prune_tags = fetch_prune_tags_config;
		else
			prune_tags = PRUNE_TAGS_BY_DEFAULT;
	}

	maybe_prune_tags = prune_tags_ok && prune_tags;
	if (maybe_prune_tags && remote_via_config)
		refspec_append(&remote->fetch, TAG_REFSPEC);

	if (maybe_prune_tags && (argc || !remote_via_config))
		refspec_append(&rs, TAG_REFSPEC);

	for (i = 0; i < argc; i++) {
		if (!strcmp(argv[i], "tag")) {
			i++;
			if (i >= argc)
				die(_("You need to specify a tag name."));

			refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
					argv[i], argv[i]);
		} else {
			refspec_append(&rs, argv[i]);
		}
	}

	if (use_stdin_refspecs) {
		struct strbuf line = STRBUF_INIT;
		while (strbuf_getline_lf(&line, stdin) != EOF)
			refspec_append(&rs, line.buf);
		strbuf_release(&line);
	}

	if (server_options.nr)
		gtransport->server_options = &server_options;

	sigchain_push_common(unlock_pack_on_signal);
	atexit(unlock_pack);
	sigchain_push(SIGPIPE, SIG_IGN);
	exit_code = do_fetch(gtransport, &rs);
	sigchain_pop(SIGPIPE);
	refspec_clear(&rs);
	transport_disconnect(gtransport);
	gtransport = NULL;
	return exit_code;
}

int cmd_fetch(int argc, const char **argv, const char *prefix)
{
	int i;
	struct string_list list = STRING_LIST_INIT_DUP;
	struct remote *remote = NULL;
	int result = 0;
	int prune_tags_ok = 1;

	packet_trace_identity("fetch");

	/* Record the command line for the reflog */
	strbuf_addstr(&default_rla, "fetch");
	for (i = 1; i < argc; i++) {
		/* This handles non-URLs gracefully */
		char *anon = transport_anonymize_url(argv[i]);

		strbuf_addf(&default_rla, " %s", anon);
		free(anon);
	}

	git_config(git_fetch_config, NULL);

	argc = parse_options(argc, argv, prefix,
			     builtin_fetch_options, builtin_fetch_usage, 0);
	if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
		int *sfjc = submodule_fetch_jobs_config == -1
			    ? &submodule_fetch_jobs_config : NULL;
		int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
			  ? &recurse_submodules : NULL;

		fetch_config_from_gitmodules(sfjc, rs);
	}

	if (deepen_relative) {
		if (deepen_relative < 0)
			die(_("Negative depth in --deepen is not supported"));
		if (depth)
			die(_("--deepen and --depth are mutually exclusive"));
		depth = xstrfmt("%d", deepen_relative);
	}
	if (unshallow) {
		if (depth)
			die(_("--depth and --unshallow cannot be used together"));
		else if (!is_repository_shallow(the_repository))
			die(_("--unshallow on a complete repository does not make sense"));
		else
			depth = xstrfmt("%d", INFINITE_DEPTH);
	}

	/* no need to be strict, transport_set_option() will validate it again */
	if (depth && atoi(depth) < 1)
		die(_("depth %s is not a positive number"), depth);
	if (depth || deepen_since || deepen_not.nr)
		deepen = 1;

	/* FETCH_HEAD never gets updated in --dry-run mode */
	if (dry_run)
		write_fetch_head = 0;

	if (all) {
		if (argc == 1)
			die(_("fetch --all does not take a repository argument"));
		else if (argc > 1)
			die(_("fetch --all does not make sense with refspecs"));
		(void) for_each_remote(get_one_remote_for_fetch, &list);
	} else if (argc == 0) {
		/* No arguments -- use default remote */
		remote = remote_get(NULL);
	} else if (multiple) {
		/* All arguments are assumed to be remotes or groups */
		for (i = 0; i < argc; i++)
			if (!add_remote_or_group(argv[i], &list))
				die(_("No such remote or remote group: %s"), argv[i]);
	} else {
		/* Single remote or group */
		(void) add_remote_or_group(argv[0], &list);
		if (list.nr > 1) {
			/* More than one remote */
			if (argc > 1)
				die(_("Fetching a group and specifying refspecs does not make sense"));
		} else {
			/* Zero or one remotes */
			remote = remote_get(argv[0]);
			prune_tags_ok = (argc == 1);
			argc--;
			argv++;
		}
	}

	if (remote) {
		if (filter_options.choice || has_promisor_remote())
			fetch_one_setup_partial(remote);
		result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
	} else {
		int max_children = max_jobs;

		if (filter_options.choice)
			die(_("--filter can only be used with the remote "
			      "configured in extensions.partialclone"));

		if (atomic_fetch)
			die(_("--atomic can only be used when fetching "
			      "from one remote"));

		if (stdin_refspecs)
			die(_("--stdin can only be used when fetching "
			      "from one remote"));

		if (max_children < 0)
			max_children = fetch_parallel_config;

		/* TODO should this also die if we have a previous partial-clone? */
		result = fetch_multiple(&list, max_children);
	}

	if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
		struct strvec options = STRVEC_INIT;
		int max_children = max_jobs;

		if (max_children < 0)
			max_children = submodule_fetch_jobs_config;
		if (max_children < 0)
			max_children = fetch_parallel_config;

		add_options_to_argv(&options);
		result = fetch_populated_submodules(the_repository,
						    &options,
						    submodule_prefix,
						    recurse_submodules,
						    recurse_submodules_default,
						    verbosity < 0,
						    max_children);
		strvec_clear(&options);
	}

	string_list_clear(&list, 0);

	prepare_repo_settings(the_repository);
	if (fetch_write_commit_graph > 0 ||
	    (fetch_write_commit_graph < 0 &&
	     the_repository->settings.fetch_write_commit_graph)) {
		int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;

		if (progress)
			commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;

		write_commit_graph_reachable(the_repository->objects->odb,
					     commit_graph_flags,
					     NULL);
	}

	close_object_store(the_repository->objects);

	if (enable_auto_gc)
		run_auto_maintenance(verbosity < 0);

	return result;
}