Git Mailing List Archive mirror
 help / color / mirror / Atom feed
blob 6ac4081d4c18d0aacfd4b57f650de21053b5e056 69974 bytes (raw)
name: builtin/log.c 	 # note: path name is non-authoritative(*)

   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
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
 
/*
 * Builtin "git log" and related commands (show, whatchanged)
 *
 * (C) Copyright 2006 Linus Torvalds
 *		 2006 Junio Hamano
 */
#include "git-compat-util.h"
#include "abspath.h"
#include "config.h"
#include "environment.h"
#include "gettext.h"
#include "hex.h"
#include "refs.h"
#include "object-file.h"
#include "object-name.h"
#include "object-store.h"
#include "pager.h"
#include "color.h"
#include "commit.h"
#include "diff.h"
#include "diff-merges.h"
#include "revision.h"
#include "log-tree.h"
#include "builtin.h"
#include "oid-array.h"
#include "tag.h"
#include "reflog-walk.h"
#include "patch-ids.h"
#include "run-command.h"
#include "shortlog.h"
#include "remote.h"
#include "string-list.h"
#include "parse-options.h"
#include "line-log.h"
#include "branch.h"
#include "streaming.h"
#include "version.h"
#include "mailmap.h"
#include "gpg-interface.h"
#include "progress.h"
#include "commit-slab.h"
#include "repository.h"
#include "commit-reach.h"
#include "range-diff.h"
#include "tmp-objdir.h"
#include "write-or-die.h"

#define MAIL_DEFAULT_WRAP 72
#define COVER_FROM_AUTO_MAX_SUBJECT_LEN 100
#define FORMAT_PATCH_NAME_MAX_DEFAULT 64

/* Set a default date-time format for git log ("log.date" config variable) */
static const char *default_date_mode = NULL;

static int default_abbrev_commit;
static int default_show_root = 1;
static int default_follow;
static int default_show_signature;
static int default_encode_email_headers = 1;
static int decoration_style;
static int decoration_given;
static int use_mailmap_config = 1;
static unsigned int force_in_body_from;
static int stdout_mboxrd;
static const char *fmt_patch_subject_prefix = "PATCH";
static int fmt_patch_name_max = FORMAT_PATCH_NAME_MAX_DEFAULT;
static const char *fmt_pretty;
static int format_no_prefix;

static const char * const builtin_log_usage[] = {
	N_("git log [<options>] [<revision-range>] [[--] <path>...]"),
	N_("git show [<options>] <object>..."),
	NULL
};

struct line_opt_callback_data {
	struct rev_info *rev;
	const char *prefix;
	struct string_list args;
};

static int session_is_interactive(void)
{
	return isatty(1) || pager_in_use();
}

static int auto_decoration_style(void)
{
	return session_is_interactive() ? DECORATE_SHORT_REFS : 0;
}

static int parse_decoration_style(const char *value)
{
	switch (git_parse_maybe_bool(value)) {
	case 1:
		return DECORATE_SHORT_REFS;
	case 0:
		return 0;
	default:
		break;
	}
	if (!strcmp(value, "full"))
		return DECORATE_FULL_REFS;
	else if (!strcmp(value, "short"))
		return DECORATE_SHORT_REFS;
	else if (!strcmp(value, "auto"))
		return auto_decoration_style();
	/*
	 * Please update _git_log() in git-completion.bash when you
	 * add new decoration styles.
	 */
	return -1;
}

static int use_default_decoration_filter = 1;
static struct string_list decorate_refs_exclude = STRING_LIST_INIT_NODUP;
static struct string_list decorate_refs_exclude_config = STRING_LIST_INIT_NODUP;
static struct string_list decorate_refs_include = STRING_LIST_INIT_NODUP;

static int clear_decorations_callback(const struct option *opt,
					    const char *arg, int unset)
{
	string_list_clear(&decorate_refs_include, 0);
	string_list_clear(&decorate_refs_exclude, 0);
	use_default_decoration_filter = 0;
	return 0;
}

static int decorate_callback(const struct option *opt, const char *arg, int unset)
{
	if (unset)
		decoration_style = 0;
	else if (arg)
		decoration_style = parse_decoration_style(arg);
	else
		decoration_style = DECORATE_SHORT_REFS;

	if (decoration_style < 0)
		die(_("invalid --decorate option: %s"), arg);

	decoration_given = 1;

	return 0;
}

static int log_line_range_callback(const struct option *option, const char *arg, int unset)
{
	struct line_opt_callback_data *data = option->value;

	BUG_ON_OPT_NEG(unset);

	if (!arg)
		return -1;

	data->rev->line_level_traverse = 1;
	string_list_append(&data->args, arg);

	return 0;
}

static void init_log_defaults(void)
{
	init_diff_ui_defaults();

	decoration_style = auto_decoration_style();
}

static void cmd_log_init_defaults(struct rev_info *rev)
{
	if (fmt_pretty)
		get_commit_format(fmt_pretty, rev);
	if (default_follow)
		rev->diffopt.flags.default_follow_renames = 1;
	rev->verbose_header = 1;
	rev->diffopt.flags.recursive = 1;
	rev->diffopt.stat_width = -1; /* use full terminal width */
	rev->diffopt.stat_graph_width = -1; /* respect statGraphWidth config */
	rev->abbrev_commit = default_abbrev_commit;
	rev->show_root_diff = default_show_root;
	rev->subject_prefix = fmt_patch_subject_prefix;
	rev->patch_name_max = fmt_patch_name_max;
	rev->show_signature = default_show_signature;
	rev->encode_email_headers = default_encode_email_headers;
	rev->diffopt.flags.allow_textconv = 1;

	if (default_date_mode)
		parse_date_format(default_date_mode, &rev->date_mode);
}

static void set_default_decoration_filter(struct decoration_filter *decoration_filter)
{
	int i;
	char *value = NULL;
	struct string_list *include = decoration_filter->include_ref_pattern;
	const struct string_list *config_exclude;

	if (!git_config_get_string_multi("log.excludeDecoration",
					 &config_exclude)) {
		struct string_list_item *item;
		for_each_string_list_item(item, config_exclude)
			string_list_append(decoration_filter->exclude_ref_config_pattern,
					   item->string);
	}

	/*
	 * By default, decorate_all is disabled. Enable it if
	 * log.initialDecorationSet=all. Don't ever disable it by config,
	 * since the command-line takes precedent.
	 */
	if (use_default_decoration_filter &&
	    !git_config_get_string("log.initialdecorationset", &value) &&
	    !strcmp("all", value))
		use_default_decoration_filter = 0;
	free(value);

	if (!use_default_decoration_filter ||
	    decoration_filter->exclude_ref_pattern->nr ||
	    decoration_filter->include_ref_pattern->nr ||
	    decoration_filter->exclude_ref_config_pattern->nr)
		return;

	/*
	 * No command-line or config options were given, so
	 * populate with sensible defaults.
	 */
	for (i = 0; i < ARRAY_SIZE(ref_namespace); i++) {
		if (!ref_namespace[i].decoration)
			continue;

		string_list_append(include, ref_namespace[i].ref);
	}
}

static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
			 struct rev_info *rev, struct setup_revision_opt *opt)
{
	struct userformat_want w;
	int quiet = 0, source = 0, mailmap;
	static struct line_opt_callback_data line_cb = {NULL, NULL, STRING_LIST_INIT_DUP};
	struct decoration_filter decoration_filter = {
		.exclude_ref_pattern = &decorate_refs_exclude,
		.include_ref_pattern = &decorate_refs_include,
		.exclude_ref_config_pattern = &decorate_refs_exclude_config,
	};
	static struct revision_sources revision_sources;

	const struct option builtin_log_options[] = {
		OPT__QUIET(&quiet, N_("suppress diff output")),
		OPT_BOOL(0, "source", &source, N_("show source")),
		OPT_BOOL(0, "use-mailmap", &mailmap, N_("use mail map file")),
		OPT_ALIAS(0, "mailmap", "use-mailmap"),
		OPT_CALLBACK_F(0, "clear-decorations", NULL, NULL,
			       N_("clear all previously-defined decoration filters"),
			       PARSE_OPT_NOARG | PARSE_OPT_NONEG,
			       clear_decorations_callback),
		OPT_STRING_LIST(0, "decorate-refs", &decorate_refs_include,
				N_("pattern"), N_("only decorate refs that match <pattern>")),
		OPT_STRING_LIST(0, "decorate-refs-exclude", &decorate_refs_exclude,
				N_("pattern"), N_("do not decorate refs that match <pattern>")),
		OPT_CALLBACK_F(0, "decorate", NULL, NULL, N_("decorate options"),
			       PARSE_OPT_OPTARG, decorate_callback),
		OPT_CALLBACK('L', NULL, &line_cb, "range:file",
			     N_("trace the evolution of line range <start>,<end> or function :<funcname> in <file>"),
			     log_line_range_callback),
		OPT_END()
	};

	line_cb.rev = rev;
	line_cb.prefix = prefix;

	mailmap = use_mailmap_config;
	argc = parse_options(argc, argv, prefix,
			     builtin_log_options, builtin_log_usage,
			     PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN_OPT |
			     PARSE_OPT_KEEP_DASHDASH);

	if (quiet)
		rev->diffopt.output_format |= DIFF_FORMAT_NO_OUTPUT;
	argc = setup_revisions(argc, argv, rev, opt);

	/* Any arguments at this point are not recognized */
	if (argc > 1)
		die(_("unrecognized argument: %s"), argv[1]);

	if (rev->line_level_traverse && rev->prune_data.nr)
		die(_("-L<range>:<file> cannot be used with pathspec"));

	memset(&w, 0, sizeof(w));
	userformat_find_requirements(NULL, &w);

	if (!rev->show_notes_given && (!rev->pretty_given || w.notes))
		rev->show_notes = 1;
	if (rev->show_notes)
		load_display_notes(&rev->notes_opt);

	if ((rev->diffopt.pickaxe_opts & DIFF_PICKAXE_KINDS_MASK) ||
	    rev->diffopt.filter || rev->diffopt.flags.follow_renames)
		rev->always_show_header = 0;

	if (source || w.source) {
		init_revision_sources(&revision_sources);
		rev->sources = &revision_sources;
	}

	if (mailmap) {
		rev->mailmap = xmalloc(sizeof(struct string_list));
		string_list_init_nodup(rev->mailmap);
		read_mailmap(rev->mailmap);
	}

	if (rev->pretty_given && rev->commit_format == CMIT_FMT_RAW) {
		/*
		 * "log --pretty=raw" is special; ignore UI oriented
		 * configuration variables such as decoration.
		 */
		if (!decoration_given)
			decoration_style = 0;
		if (!rev->abbrev_commit_given)
			rev->abbrev_commit = 0;
	}

	if (rev->commit_format == CMIT_FMT_USERFORMAT) {
		if (!w.decorate) {
			/*
			 * Disable decoration loading if the format will not
			 * show them anyway.
			 */
			decoration_style = 0;
		} else if (!decoration_style) {
			/*
			 * If we are going to show them, make sure we do load
			 * them here, but taking care not to override a
			 * specific style set by config or --decorate.
			 */
			decoration_style = DECORATE_SHORT_REFS;
		}
	}

	if (decoration_style || rev->simplify_by_decoration) {
		set_default_decoration_filter(&decoration_filter);

		if (decoration_style)
			rev->show_decorations = 1;

		load_ref_decorations(&decoration_filter, decoration_style);
	}

	if (rev->line_level_traverse)
		line_log_init(rev, line_cb.prefix, &line_cb.args);

	setup_pager();
}

static void cmd_log_init(int argc, const char **argv, const char *prefix,
			 struct rev_info *rev, struct setup_revision_opt *opt)
{
	cmd_log_init_defaults(rev);
	cmd_log_init_finish(argc, argv, prefix, rev, opt);
}

static int cmd_log_deinit(int ret, struct rev_info *rev)
{
	release_revisions(rev);
	return ret;
}

/*
 * This gives a rough estimate for how many commits we
 * will print out in the list.
 */
static int estimate_commit_count(struct commit_list *list)
{
	int n = 0;

	while (list) {
		struct commit *commit = list->item;
		unsigned int flags = commit->object.flags;
		list = list->next;
		if (!(flags & (TREESAME | UNINTERESTING)))
			n++;
	}
	return n;
}

static void show_early_header(struct rev_info *rev, const char *stage, int nr)
{
	if (rev->shown_one) {
		rev->shown_one = 0;
		if (rev->commit_format != CMIT_FMT_ONELINE)
			putchar(rev->diffopt.line_termination);
	}
	fprintf(rev->diffopt.file, _("Final output: %d %s\n"), nr, stage);
}

static struct itimerval early_output_timer;

static void log_show_early(struct rev_info *revs, struct commit_list *list)
{
	int i = revs->early_output;
	int show_header = 1;
	int no_free = revs->diffopt.no_free;

	revs->diffopt.no_free = 0;
	sort_in_topological_order(&list, revs->sort_order);
	while (list && i) {
		struct commit *commit = list->item;
		switch (simplify_commit(revs, commit)) {
		case commit_show:
			if (show_header) {
				int n = estimate_commit_count(list);
				show_early_header(revs, "incomplete", n);
				show_header = 0;
			}
			log_tree_commit(revs, commit);
			i--;
			break;
		case commit_ignore:
			break;
		case commit_error:
			revs->diffopt.no_free = no_free;
			diff_free(&revs->diffopt);
			return;
		}
		list = list->next;
	}

	/* Did we already get enough commits for the early output? */
	if (!i) {
		revs->diffopt.no_free = 0;
		diff_free(&revs->diffopt);
		return;
	}

	/*
	 * ..if no, then repeat it twice a second until we
	 * do.
	 *
	 * NOTE! We don't use "it_interval", because if the
	 * reader isn't listening, we want our output to be
	 * throttled by the writing, and not have the timer
	 * trigger every second even if we're blocked on a
	 * reader!
	 */
	early_output_timer.it_value.tv_sec = 0;
	early_output_timer.it_value.tv_usec = 500000;
	setitimer(ITIMER_REAL, &early_output_timer, NULL);
}

static void early_output(int signal UNUSED)
{
	show_early_output = log_show_early;
}

static void setup_early_output(void)
{
	struct sigaction sa;

	/*
	 * Set up the signal handler, minimally intrusively:
	 * we only set a single volatile integer word (not
	 * using sigatomic_t - trying to avoid unnecessary
	 * system dependencies and headers), and using
	 * SA_RESTART.
	 */
	memset(&sa, 0, sizeof(sa));
	sa.sa_handler = early_output;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;
	sigaction(SIGALRM, &sa, NULL);

	/*
	 * If we can get the whole output in less than a
	 * tenth of a second, don't even bother doing the
	 * early-output thing..
	 *
	 * This is a one-time-only trigger.
	 */
	early_output_timer.it_value.tv_sec = 0;
	early_output_timer.it_value.tv_usec = 100000;
	setitimer(ITIMER_REAL, &early_output_timer, NULL);
}

static void finish_early_output(struct rev_info *rev)
{
	int n = estimate_commit_count(rev->commits);
	signal(SIGALRM, SIG_IGN);
	show_early_header(rev, "done", n);
}

static int cmd_log_walk_no_free(struct rev_info *rev)
{
	struct commit *commit;
	int saved_nrl = 0;
	int saved_dcctc = 0;

	if (rev->remerge_diff) {
		rev->remerge_objdir = tmp_objdir_create("remerge-diff");
		if (!rev->remerge_objdir)
			die(_("unable to create temporary object directory"));
		tmp_objdir_replace_primary_odb(rev->remerge_objdir, 1);
	}

	if (rev->early_output)
		setup_early_output();

	if (prepare_revision_walk(rev))
		die(_("revision walk setup failed"));

	if (rev->early_output)
		finish_early_output(rev);

	/*
	 * For --check and --exit-code, the exit code is based on CHECK_FAILED
	 * and HAS_CHANGES being accumulated in rev->diffopt, so be careful to
	 * retain that state information if replacing rev->diffopt in this loop
	 */
	while ((commit = get_revision(rev)) != NULL) {
		if (!log_tree_commit(rev, commit) && rev->max_count >= 0)
			/*
			 * We decremented max_count in get_revision,
			 * but we didn't actually show the commit.
			 */
			rev->max_count++;
		if (!rev->reflog_info) {
			/*
			 * We may show a given commit multiple times when
			 * walking the reflogs.
			 */
			free_commit_buffer(the_repository->parsed_objects,
					   commit);
			free_commit_list(commit->parents);
			commit->parents = NULL;
		}
		if (saved_nrl < rev->diffopt.needed_rename_limit)
			saved_nrl = rev->diffopt.needed_rename_limit;
		if (rev->diffopt.degraded_cc_to_c)
			saved_dcctc = 1;
	}
	rev->diffopt.degraded_cc_to_c = saved_dcctc;
	rev->diffopt.needed_rename_limit = saved_nrl;

	if (rev->remerge_diff) {
		tmp_objdir_destroy(rev->remerge_objdir);
		rev->remerge_objdir = NULL;
	}

	if (rev->diffopt.output_format & DIFF_FORMAT_CHECKDIFF &&
	    rev->diffopt.flags.check_failed) {
		return 02;
	}
	return diff_result_code(&rev->diffopt, 0);
}

static int cmd_log_walk(struct rev_info *rev)
{
	int retval;

	rev->diffopt.no_free = 1;
	retval = cmd_log_walk_no_free(rev);
	rev->diffopt.no_free = 0;
	diff_free(&rev->diffopt);
	return retval;
}

static int git_log_config(const char *var, const char *value, void *cb)
{
	const char *slot_name;

	if (!strcmp(var, "format.pretty"))
		return git_config_string(&fmt_pretty, var, value);
	if (!strcmp(var, "format.subjectprefix"))
		return git_config_string(&fmt_patch_subject_prefix, var, value);
	if (!strcmp(var, "format.filenamemaxlength")) {
		fmt_patch_name_max = git_config_int(var, value);
		return 0;
	}
	if (!strcmp(var, "format.encodeemailheaders")) {
		default_encode_email_headers = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "log.abbrevcommit")) {
		default_abbrev_commit = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "log.date"))
		return git_config_string(&default_date_mode, var, value);
	if (!strcmp(var, "log.decorate")) {
		decoration_style = parse_decoration_style(value);
		if (decoration_style < 0)
			decoration_style = 0; /* maybe warn? */
		return 0;
	}
	if (!strcmp(var, "log.diffmerges"))
		return diff_merges_config(value);
	if (!strcmp(var, "log.showroot")) {
		default_show_root = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "log.follow")) {
		default_follow = git_config_bool(var, value);
		return 0;
	}
	if (skip_prefix(var, "color.decorate.", &slot_name))
		return parse_decorate_color_config(var, slot_name, value);
	if (!strcmp(var, "log.mailmap")) {
		use_mailmap_config = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "log.showsignature")) {
		default_show_signature = git_config_bool(var, value);
		return 0;
	}

	return git_diff_ui_config(var, value, cb);
}

int cmd_whatchanged(int argc, const char **argv, const char *prefix)
{
	struct rev_info rev;
	struct setup_revision_opt opt;

	init_log_defaults();
	git_config(git_log_config, NULL);

	repo_init_revisions(the_repository, &rev, prefix);
	git_config(grep_config, &rev.grep_filter);

	rev.diff = 1;
	rev.simplify_history = 0;
	memset(&opt, 0, sizeof(opt));
	opt.def = "HEAD";
	opt.revarg_opt = REVARG_COMMITTISH;
	cmd_log_init(argc, argv, prefix, &rev, &opt);
	if (!rev.diffopt.output_format)
		rev.diffopt.output_format = DIFF_FORMAT_RAW;
	return cmd_log_deinit(cmd_log_walk(&rev), &rev);
}

static void show_tagger(const char *buf, struct rev_info *rev)
{
	struct strbuf out = STRBUF_INIT;
	struct pretty_print_context pp = {0};

	pp.fmt = rev->commit_format;
	pp.date_mode = rev->date_mode;
	pp_user_info(&pp, "Tagger", &out, buf, get_log_output_encoding());
	fprintf(rev->diffopt.file, "%s", out.buf);
	strbuf_release(&out);
}

static int show_blob_object(const struct object_id *oid, struct rev_info *rev, const char *obj_name)
{
	struct object_id oidc;
	struct object_context obj_context;
	char *buf;
	unsigned long size;

	fflush(rev->diffopt.file);
	if (!rev->diffopt.flags.textconv_set_via_cmdline ||
	    !rev->diffopt.flags.allow_textconv)
		return stream_blob_to_fd(1, oid, NULL, 0);

	if (get_oid_with_context(the_repository, obj_name,
				 GET_OID_RECORD_PATH,
				 &oidc, &obj_context))
		die(_("not a valid object name %s"), obj_name);
	if (!obj_context.path ||
	    !textconv_object(the_repository, obj_context.path,
			     obj_context.mode, &oidc, 1, &buf, &size)) {
		free(obj_context.path);
		return stream_blob_to_fd(1, oid, NULL, 0);
	}

	if (!buf)
		die(_("git show %s: bad file"), obj_name);

	write_or_die(1, buf, size);
	free(obj_context.path);
	return 0;
}

static int show_tag_object(const struct object_id *oid, struct rev_info *rev)
{
	unsigned long size;
	enum object_type type;
	char *buf = repo_read_object_file(the_repository, oid, &type, &size);
	int offset = 0;

	if (!buf)
		return error(_("could not read object %s"), oid_to_hex(oid));

	assert(type == OBJ_TAG);
	while (offset < size && buf[offset] != '\n') {
		int new_offset = offset + 1;
		const char *ident;
		while (new_offset < size && buf[new_offset++] != '\n')
			; /* do nothing */
		if (skip_prefix(buf + offset, "tagger ", &ident))
			show_tagger(ident, rev);
		offset = new_offset;
	}

	if (offset < size)
		fwrite(buf + offset, size - offset, 1, rev->diffopt.file);
	free(buf);
	return 0;
}

static int show_tree_object(const struct object_id *oid UNUSED,
			    struct strbuf *base UNUSED,
			    const char *pathname, unsigned mode,
			    void *context)
{
	FILE *file = context;
	fprintf(file, "%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
	return 0;
}

static void show_setup_revisions_tweak(struct rev_info *rev,
				       struct setup_revision_opt *opt)
{
	if (rev->first_parent_only)
		diff_merges_default_to_first_parent(rev);
	else
		diff_merges_default_to_dense_combined(rev);
	if (!rev->diffopt.output_format)
		rev->diffopt.output_format = DIFF_FORMAT_PATCH;
}

int cmd_show(int argc, const char **argv, const char *prefix)
{
	struct rev_info rev;
	unsigned int i;
	struct setup_revision_opt opt;
	struct pathspec match_all;
	int ret = 0;

	init_log_defaults();
	git_config(git_log_config, NULL);

	if (the_repository->gitdir) {
		prepare_repo_settings(the_repository);
		the_repository->settings.command_requires_full_index = 0;
	}

	memset(&match_all, 0, sizeof(match_all));
	repo_init_revisions(the_repository, &rev, prefix);
	git_config(grep_config, &rev.grep_filter);

	rev.diff = 1;
	rev.always_show_header = 1;
	rev.no_walk = 1;
	rev.diffopt.stat_width = -1; 	/* Scale to real terminal size */

	memset(&opt, 0, sizeof(opt));
	opt.def = "HEAD";
	opt.tweak = show_setup_revisions_tweak;
	cmd_log_init(argc, argv, prefix, &rev, &opt);

	if (!rev.no_walk)
		return cmd_log_deinit(cmd_log_walk(&rev), &rev);

	rev.diffopt.no_free = 1;
	for (i = 0; i < rev.pending.nr && !ret; i++) {
		struct object *o = rev.pending.objects[i].item;
		const char *name = rev.pending.objects[i].name;
		switch (o->type) {
		case OBJ_BLOB:
			ret = show_blob_object(&o->oid, &rev, name);
			break;
		case OBJ_TAG: {
			struct tag *t = (struct tag *)o;
			struct object_id *oid = get_tagged_oid(t);

			if (rev.shown_one)
				putchar('\n');
			fprintf(rev.diffopt.file, "%stag %s%s\n",
					diff_get_color_opt(&rev.diffopt, DIFF_COMMIT),
					t->tag,
					diff_get_color_opt(&rev.diffopt, DIFF_RESET));
			ret = show_tag_object(&o->oid, &rev);
			rev.shown_one = 1;
			if (ret)
				break;
			o = parse_object(the_repository, oid);
			if (!o)
				ret = error(_("could not read object %s"),
					    oid_to_hex(oid));
			rev.pending.objects[i].item = o;
			i--;
			break;
		}
		case OBJ_TREE:
			if (rev.shown_one)
				putchar('\n');
			fprintf(rev.diffopt.file, "%stree %s%s\n\n",
					diff_get_color_opt(&rev.diffopt, DIFF_COMMIT),
					name,
					diff_get_color_opt(&rev.diffopt, DIFF_RESET));
			read_tree(the_repository, (struct tree *)o,
				  &match_all, show_tree_object,
				  rev.diffopt.file);
			rev.shown_one = 1;
			break;
		case OBJ_COMMIT:
		{
			struct object_array old;
			struct object_array blank = OBJECT_ARRAY_INIT;

			memcpy(&old, &rev.pending, sizeof(old));
			memcpy(&rev.pending, &blank, sizeof(rev.pending));

			add_object_array(o, name, &rev.pending);
			ret = cmd_log_walk_no_free(&rev);

			/*
			 * No need for
			 * object_array_clear(&pending). It was
			 * cleared already in prepare_revision_walk()
			 */
			memcpy(&rev.pending, &old, sizeof(rev.pending));
			break;
		}
		default:
			ret = error(_("unknown type: %d"), o->type);
		}
	}

	rev.diffopt.no_free = 0;
	diff_free(&rev.diffopt);

	return cmd_log_deinit(ret, &rev);
}

/*
 * This is equivalent to "git log -g --abbrev-commit --pretty=oneline"
 */
int cmd_log_reflog(int argc, const char **argv, const char *prefix)
{
	struct rev_info rev;
	struct setup_revision_opt opt;

	init_log_defaults();
	git_config(git_log_config, NULL);

	repo_init_revisions(the_repository, &rev, prefix);
	init_reflog_walk(&rev.reflog_info);
	git_config(grep_config, &rev.grep_filter);

	rev.verbose_header = 1;
	memset(&opt, 0, sizeof(opt));
	opt.def = "HEAD";
	cmd_log_init_defaults(&rev);
	rev.abbrev_commit = 1;
	rev.commit_format = CMIT_FMT_ONELINE;
	rev.use_terminator = 1;
	rev.always_show_header = 1;
	cmd_log_init_finish(argc, argv, prefix, &rev, &opt);

	return cmd_log_deinit(cmd_log_walk(&rev), &rev);
}

static void log_setup_revisions_tweak(struct rev_info *rev,
				      struct setup_revision_opt *opt)
{
	if (rev->diffopt.flags.default_follow_renames &&
	    rev->prune_data.nr == 1)
		rev->diffopt.flags.follow_renames = 1;

	if (rev->first_parent_only)
		diff_merges_default_to_first_parent(rev);
}

int cmd_log(int argc, const char **argv, const char *prefix)
{
	struct rev_info rev;
	struct setup_revision_opt opt;

	init_log_defaults();
	git_config(git_log_config, NULL);

	repo_init_revisions(the_repository, &rev, prefix);
	git_config(grep_config, &rev.grep_filter);

	rev.always_show_header = 1;
	memset(&opt, 0, sizeof(opt));
	opt.def = "HEAD";
	opt.revarg_opt = REVARG_COMMITTISH;
	opt.tweak = log_setup_revisions_tweak;
	cmd_log_init(argc, argv, prefix, &rev, &opt);
	return cmd_log_deinit(cmd_log_walk(&rev), &rev);
}

/* format-patch */

static const char *fmt_patch_suffix = ".patch";
static int numbered = 0;
static int auto_number = 1;

static char *default_attach = NULL;

static struct string_list extra_hdr = STRING_LIST_INIT_NODUP;
static struct string_list extra_to = STRING_LIST_INIT_NODUP;
static struct string_list extra_cc = STRING_LIST_INIT_NODUP;

static void add_header(const char *value)
{
	struct string_list_item *item;
	int len = strlen(value);
	while (len && value[len - 1] == '\n')
		len--;

	if (!strncasecmp(value, "to: ", 4)) {
		item = string_list_append(&extra_to, value + 4);
		len -= 4;
	} else if (!strncasecmp(value, "cc: ", 4)) {
		item = string_list_append(&extra_cc, value + 4);
		len -= 4;
	} else {
		item = string_list_append(&extra_hdr, value);
	}

	item->string[len] = '\0';
}

enum cover_setting {
	COVER_UNSET,
	COVER_OFF,
	COVER_ON,
	COVER_AUTO
};

enum thread_level {
	THREAD_UNSET,
	THREAD_SHALLOW,
	THREAD_DEEP
};

enum cover_from_description {
	COVER_FROM_NONE,
	COVER_FROM_MESSAGE,
	COVER_FROM_SUBJECT,
	COVER_FROM_AUTO
};

enum auto_base_setting {
	AUTO_BASE_NEVER,
	AUTO_BASE_ALWAYS,
	AUTO_BASE_WHEN_ABLE
};

static enum thread_level thread;
static int do_signoff;
static enum auto_base_setting auto_base;
static char *from;
static const char *signature = git_version_string;
static const char *signature_file;
static enum cover_setting config_cover_letter;
static const char *config_output_directory;
static enum cover_from_description cover_from_description_mode = COVER_FROM_MESSAGE;
static int show_notes;
static struct display_notes_opt notes_opt;

static enum cover_from_description parse_cover_from_description(const char *arg)
{
	if (!arg || !strcmp(arg, "default"))
		return COVER_FROM_MESSAGE;
	else if (!strcmp(arg, "none"))
		return COVER_FROM_NONE;
	else if (!strcmp(arg, "message"))
		return COVER_FROM_MESSAGE;
	else if (!strcmp(arg, "subject"))
		return COVER_FROM_SUBJECT;
	else if (!strcmp(arg, "auto"))
		return COVER_FROM_AUTO;
	else
		die(_("%s: invalid cover from description mode"), arg);
}

static int git_format_config(const char *var, const char *value, void *cb)
{
	if (!strcmp(var, "format.headers")) {
		if (!value)
			die(_("format.headers without value"));
		add_header(value);
		return 0;
	}
	if (!strcmp(var, "format.suffix"))
		return git_config_string(&fmt_patch_suffix, var, value);
	if (!strcmp(var, "format.to")) {
		if (!value)
			return config_error_nonbool(var);
		string_list_append(&extra_to, value);
		return 0;
	}
	if (!strcmp(var, "format.cc")) {
		if (!value)
			return config_error_nonbool(var);
		string_list_append(&extra_cc, value);
		return 0;
	}
	if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff") ||
	    !strcmp(var, "color.ui") || !strcmp(var, "diff.submodule")) {
		return 0;
	}
	if (!strcmp(var, "format.numbered")) {
		if (value && !strcasecmp(value, "auto")) {
			auto_number = 1;
			return 0;
		}
		numbered = git_config_bool(var, value);
		auto_number = auto_number && numbered;
		return 0;
	}
	if (!strcmp(var, "format.attach")) {
		if (value && *value)
			default_attach = xstrdup(value);
		else if (value && !*value)
			FREE_AND_NULL(default_attach);
		else
			default_attach = xstrdup(git_version_string);
		return 0;
	}
	if (!strcmp(var, "format.thread")) {
		if (value && !strcasecmp(value, "deep")) {
			thread = THREAD_DEEP;
			return 0;
		}
		if (value && !strcasecmp(value, "shallow")) {
			thread = THREAD_SHALLOW;
			return 0;
		}
		thread = git_config_bool(var, value) ? THREAD_SHALLOW : THREAD_UNSET;
		return 0;
	}
	if (!strcmp(var, "format.signoff")) {
		do_signoff = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "format.signature"))
		return git_config_string(&signature, var, value);
	if (!strcmp(var, "format.signaturefile"))
		return git_config_pathname(&signature_file, var, value);
	if (!strcmp(var, "format.coverletter")) {
		if (value && !strcasecmp(value, "auto")) {
			config_cover_letter = COVER_AUTO;
			return 0;
		}
		config_cover_letter = git_config_bool(var, value) ? COVER_ON : COVER_OFF;
		return 0;
	}
	if (!strcmp(var, "format.outputdirectory"))
		return git_config_string(&config_output_directory, var, value);
	if (!strcmp(var, "format.useautobase")) {
		if (value && !strcasecmp(value, "whenAble")) {
			auto_base = AUTO_BASE_WHEN_ABLE;
			return 0;
		}
		auto_base = git_config_bool(var, value) ? AUTO_BASE_ALWAYS : AUTO_BASE_NEVER;
		return 0;
	}
	if (!strcmp(var, "format.from")) {
		int b = git_parse_maybe_bool(value);
		free(from);
		if (b < 0)
			from = xstrdup(value);
		else if (b)
			from = xstrdup(git_committer_info(IDENT_NO_DATE));
		else
			from = NULL;
		return 0;
	}
	if (!strcmp(var, "format.forceinbodyfrom")) {
		force_in_body_from = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "format.notes")) {
		int b = git_parse_maybe_bool(value);
		if (b < 0)
			enable_ref_display_notes(&notes_opt, &show_notes, value);
		else if (b)
			enable_default_display_notes(&notes_opt, &show_notes);
		else
			disable_display_notes(&notes_opt, &show_notes);
		return 0;
	}
	if (!strcmp(var, "format.coverfromdescription")) {
		cover_from_description_mode = parse_cover_from_description(value);
		return 0;
	}
	if (!strcmp(var, "format.mboxrd")) {
		stdout_mboxrd = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "format.noprefix")) {
		format_no_prefix = 1;
		return 0;
	}

	/*
	 * ignore some porcelain config which would otherwise be parsed by
	 * git_diff_ui_config(), via git_log_config(); we can't just avoid
	 * diff_ui_config completely, because we do care about some ui options
	 * like color.
	 */
	if (!strcmp(var, "diff.noprefix"))
		return 0;

	return git_log_config(var, value, cb);
}

static const char *output_directory = NULL;
static int outdir_offset;

static int open_next_file(struct commit *commit, const char *subject,
			 struct rev_info *rev, int quiet)
{
	struct strbuf filename = STRBUF_INIT;

	if (output_directory) {
		strbuf_addstr(&filename, output_directory);
		strbuf_complete(&filename, '/');
	}

	if (rev->numbered_files)
		strbuf_addf(&filename, "%d", rev->nr);
	else if (commit)
		fmt_output_commit(&filename, commit, rev);
	else
		fmt_output_subject(&filename, subject, rev);

	if (!quiet)
		printf("%s\n", filename.buf + outdir_offset);

	if (!(rev->diffopt.file = fopen(filename.buf, "w"))) {
		error_errno(_("cannot open patch file %s"), filename.buf);
		strbuf_release(&filename);
		return -1;
	}

	strbuf_release(&filename);
	return 0;
}

static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids)
{
	struct rev_info check_rev;
	struct commit *commit, *c1, *c2;
	struct object *o1, *o2;
	unsigned flags1, flags2;

	if (rev->pending.nr != 2)
		die(_("need exactly one range"));

	o1 = rev->pending.objects[0].item;
	o2 = rev->pending.objects[1].item;
	flags1 = o1->flags;
	flags2 = o2->flags;
	c1 = lookup_commit_reference(the_repository, &o1->oid);
	c2 = lookup_commit_reference(the_repository, &o2->oid);

	if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
		die(_("not a range"));

	init_patch_ids(the_repository, ids);

	/* given a range a..b get all patch ids for b..a */
	repo_init_revisions(the_repository, &check_rev, rev->prefix);
	check_rev.max_parents = 1;
	o1->flags ^= UNINTERESTING;
	o2->flags ^= UNINTERESTING;
	add_pending_object(&check_rev, o1, "o1");
	add_pending_object(&check_rev, o2, "o2");
	if (prepare_revision_walk(&check_rev))
		die(_("revision walk setup failed"));

	while ((commit = get_revision(&check_rev)) != NULL) {
		add_commit_patch_id(commit, ids);
	}

	/* reset for next revision walk */
	clear_commit_marks(c1, SEEN | UNINTERESTING | SHOWN | ADDED);
	clear_commit_marks(c2, SEEN | UNINTERESTING | SHOWN | ADDED);
	o1->flags = flags1;
	o2->flags = flags2;
}

static void gen_message_id(struct rev_info *info, char *base)
{
	struct strbuf buf = STRBUF_INIT;
	strbuf_addf(&buf, "%s.%"PRItime".git.%s", base,
		    (timestamp_t) time(NULL),
		    git_committer_info(IDENT_NO_NAME|IDENT_NO_DATE|IDENT_STRICT));
	info->message_id = strbuf_detach(&buf, NULL);
}

static void print_signature(FILE *file)
{
	if (!signature || !*signature)
		return;

	fprintf(file, "-- \n%s", signature);
	if (signature[strlen(signature)-1] != '\n')
		putc('\n', file);
	putc('\n', file);
}

static char *find_branch_name(struct rev_info *rev)
{
	int i, positive = -1;
	struct object_id branch_oid;
	const struct object_id *tip_oid;
	const char *ref, *v;
	char *full_ref, *branch = NULL;

	for (i = 0; i < rev->cmdline.nr; i++) {
		if (rev->cmdline.rev[i].flags & UNINTERESTING)
			continue;
		if (positive < 0)
			positive = i;
		else
			return NULL;
	}
	if (positive < 0)
		return NULL;
	ref = rev->cmdline.rev[positive].name;
	tip_oid = &rev->cmdline.rev[positive].item->oid;
	if (repo_dwim_ref(the_repository, ref, strlen(ref), &branch_oid,
			  &full_ref, 0) &&
	    skip_prefix(full_ref, "refs/heads/", &v) &&
	    oideq(tip_oid, &branch_oid))
		branch = xstrdup(v);
	free(full_ref);
	return branch;
}

static void show_diffstat(struct rev_info *rev,
			  struct commit *origin, struct commit *head)
{
	struct diff_options opts;

	memcpy(&opts, &rev->diffopt, sizeof(opts));
	opts.output_format = DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
	diff_setup_done(&opts);

	diff_tree_oid(get_commit_tree_oid(origin),
		      get_commit_tree_oid(head),
		      "", &opts);
	diffcore_std(&opts);
	diff_flush(&opts);

	fprintf(rev->diffopt.file, "\n");
}

static void prepare_cover_text(struct pretty_print_context *pp,
			       const char *branch_name,
			       struct strbuf *sb,
			       const char *encoding,
			       int need_8bit_cte)
{
	const char *subject = "*** SUBJECT HERE ***";
	const char *body = "*** BLURB HERE ***";
	struct strbuf description_sb = STRBUF_INIT;
	struct strbuf subject_sb = STRBUF_INIT;

	if (cover_from_description_mode == COVER_FROM_NONE)
		goto do_pp;

	if (branch_name && *branch_name)
		read_branch_desc(&description_sb, branch_name);
	if (!description_sb.len)
		goto do_pp;

	if (cover_from_description_mode == COVER_FROM_SUBJECT ||
			cover_from_description_mode == COVER_FROM_AUTO)
		body = format_subject(&subject_sb, description_sb.buf, " ");

	if (cover_from_description_mode == COVER_FROM_MESSAGE ||
			(cover_from_description_mode == COVER_FROM_AUTO &&
			 subject_sb.len > COVER_FROM_AUTO_MAX_SUBJECT_LEN))
		body = description_sb.buf;
	else
		subject = subject_sb.buf;

do_pp:
	pp_title_line(pp, &subject, sb, encoding, need_8bit_cte);
	pp_remainder(pp, &body, sb, 0);

	strbuf_release(&description_sb);
	strbuf_release(&subject_sb);
}

static int get_notes_refs(struct string_list_item *item, void *arg)
{
	strvec_pushf(arg, "--notes=%s", item->string);
	return 0;
}

static void get_notes_args(struct strvec *arg, struct rev_info *rev)
{
	if (!rev->show_notes) {
		strvec_push(arg, "--no-notes");
	} else if (rev->notes_opt.use_default_notes > 0 ||
		   (rev->notes_opt.use_default_notes == -1 &&
		    !rev->notes_opt.extra_notes_refs.nr)) {
		strvec_push(arg, "--notes");
	} else {
		for_each_string_list(&rev->notes_opt.extra_notes_refs, get_notes_refs, arg);
	}
}

static void make_cover_letter(struct rev_info *rev, int use_separate_file,
			      struct commit *origin,
			      int nr, struct commit **list,
			      const char *branch_name,
			      int quiet)
{
	const char *committer;
	struct shortlog log;
	struct strbuf sb = STRBUF_INIT;
	int i;
	const char *encoding = "UTF-8";
	int need_8bit_cte = 0;
	struct pretty_print_context pp = {0};
	struct commit *head = list[0];

	if (!cmit_fmt_is_mail(rev->commit_format))
		die(_("cover letter needs email format"));

	committer = git_committer_info(0);

	if (use_separate_file &&
	    open_next_file(NULL, rev->numbered_files ? NULL : "cover-letter", rev, quiet))
		die(_("failed to create cover-letter file"));

	log_write_email_headers(rev, head, &pp.after_subject, &need_8bit_cte, 0);

	for (i = 0; !need_8bit_cte && i < nr; i++) {
		const char *buf = repo_get_commit_buffer(the_repository,
							 list[i], NULL);
		if (has_non_ascii(buf))
			need_8bit_cte = 1;
		repo_unuse_commit_buffer(the_repository, list[i], buf);
	}

	if (!branch_name)
		branch_name = find_branch_name(rev);

	pp.fmt = CMIT_FMT_EMAIL;
	pp.date_mode.type = DATE_RFC2822;
	pp.rev = rev;
	pp.print_email_subject = 1;
	pp_user_info(&pp, NULL, &sb, committer, encoding);
	prepare_cover_text(&pp, branch_name, &sb, encoding, need_8bit_cte);
	fprintf(rev->diffopt.file, "%s\n", sb.buf);

	strbuf_release(&sb);

	shortlog_init(&log);
	log.wrap_lines = 1;
	log.wrap = MAIL_DEFAULT_WRAP;
	log.in1 = 2;
	log.in2 = 4;
	log.file = rev->diffopt.file;
	log.groups = SHORTLOG_GROUP_AUTHOR;
	shortlog_finish_setup(&log);
	for (i = 0; i < nr; i++)
		shortlog_add_commit(&log, list[i]);

	shortlog_output(&log);

	/* We can only do diffstat with a unique reference point */
	if (origin)
		show_diffstat(rev, origin, head);

	if (rev->idiff_oid1) {
		fprintf_ln(rev->diffopt.file, "%s", rev->idiff_title);
		show_interdiff(rev->idiff_oid1, rev->idiff_oid2, 0,
			       &rev->diffopt);
	}

	if (rev->rdiff1) {
		/*
		 * Pass minimum required diff-options to range-diff; others
		 * can be added later if deemed desirable.
		 */
		struct diff_options opts;
		struct strvec other_arg = STRVEC_INIT;
		struct range_diff_options range_diff_opts = {
			.creation_factor = rev->creation_factor,
			.dual_color = 1,
			.diffopt = &opts,
			.other_arg = &other_arg
		};

		repo_diff_setup(the_repository, &opts);
		opts.file = rev->diffopt.file;
		opts.use_color = rev->diffopt.use_color;
		diff_setup_done(&opts);
		fprintf_ln(rev->diffopt.file, "%s", rev->rdiff_title);
		get_notes_args(&other_arg, rev);
		show_range_diff(rev->rdiff1, rev->rdiff2, &range_diff_opts);
		strvec_clear(&other_arg);
	}
}

static const char *clean_message_id(const char *msg_id)
{
	char ch;
	const char *a, *z, *m;

	m = msg_id;
	while ((ch = *m) && (isspace(ch) || (ch == '<')))
		m++;
	a = m;
	z = NULL;
	while ((ch = *m)) {
		if (!isspace(ch) && (ch != '>'))
			z = m;
		m++;
	}
	if (!z)
		die(_("insane in-reply-to: %s"), msg_id);
	if (++z == m)
		return a;
	return xmemdupz(a, z - a);
}

static const char *set_outdir(const char *prefix, const char *output_directory)
{
	if (output_directory && is_absolute_path(output_directory))
		return output_directory;

	if (!prefix || !*prefix) {
		if (output_directory)
			return output_directory;
		/* The user did not explicitly ask for "./" */
		outdir_offset = 2;
		return "./";
	}

	outdir_offset = strlen(prefix);
	if (!output_directory)
		return prefix;

	return prefix_filename(prefix, output_directory);
}

static const char * const builtin_format_patch_usage[] = {
	N_("git format-patch [<options>] [<since> | <revision-range>]"),
	NULL
};

static int keep_subject = 0;

static int keep_callback(const struct option *opt, const char *arg, int unset)
{
	BUG_ON_OPT_NEG(unset);
	BUG_ON_OPT_ARG(arg);
	((struct rev_info *)opt->value)->total = -1;
	keep_subject = 1;
	return 0;
}

static int subject_prefix = 0;

static int subject_prefix_callback(const struct option *opt, const char *arg,
			    int unset)
{
	BUG_ON_OPT_NEG(unset);
	subject_prefix = 1;
	((struct rev_info *)opt->value)->subject_prefix = arg;
	return 0;
}

static int rfc_callback(const struct option *opt, const char *arg, int unset)
{
	BUG_ON_OPT_NEG(unset);
	BUG_ON_OPT_ARG(arg);
	return subject_prefix_callback(opt, "RFC PATCH", unset);
}

static int numbered_cmdline_opt = 0;

static int numbered_callback(const struct option *opt, const char *arg,
			     int unset)
{
	BUG_ON_OPT_ARG(arg);
	*(int *)opt->value = numbered_cmdline_opt = unset ? 0 : 1;
	if (unset)
		auto_number =  0;
	return 0;
}

static int no_numbered_callback(const struct option *opt, const char *arg,
				int unset)
{
	BUG_ON_OPT_NEG(unset);
	return numbered_callback(opt, arg, 1);
}

static int output_directory_callback(const struct option *opt, const char *arg,
			      int unset)
{
	const char **dir = (const char **)opt->value;
	BUG_ON_OPT_NEG(unset);
	if (*dir)
		die(_("two output directories?"));
	*dir = arg;
	return 0;
}

static int thread_callback(const struct option *opt, const char *arg, int unset)
{
	enum thread_level *thread = (enum thread_level *)opt->value;
	if (unset)
		*thread = THREAD_UNSET;
	else if (!arg || !strcmp(arg, "shallow"))
		*thread = THREAD_SHALLOW;
	else if (!strcmp(arg, "deep"))
		*thread = THREAD_DEEP;
	/*
	 * Please update _git_formatpatch() in git-completion.bash
	 * when you add new options.
	 */
	else
		return 1;
	return 0;
}

static int attach_callback(const struct option *opt, const char *arg, int unset)
{
	struct rev_info *rev = (struct rev_info *)opt->value;
	if (unset)
		rev->mime_boundary = NULL;
	else if (arg)
		rev->mime_boundary = arg;
	else
		rev->mime_boundary = git_version_string;
	rev->no_inline = unset ? 0 : 1;
	return 0;
}

static int inline_callback(const struct option *opt, const char *arg, int unset)
{
	struct rev_info *rev = (struct rev_info *)opt->value;
	if (unset)
		rev->mime_boundary = NULL;
	else if (arg)
		rev->mime_boundary = arg;
	else
		rev->mime_boundary = git_version_string;
	rev->no_inline = 0;
	return 0;
}

static int header_callback(const struct option *opt, const char *arg, int unset)
{
	if (unset) {
		string_list_clear(&extra_hdr, 0);
		string_list_clear(&extra_to, 0);
		string_list_clear(&extra_cc, 0);
	} else {
		add_header(arg);
	}
	return 0;
}

static int to_callback(const struct option *opt, const char *arg, int unset)
{
	if (unset)
		string_list_clear(&extra_to, 0);
	else
		string_list_append(&extra_to, arg);
	return 0;
}

static int cc_callback(const struct option *opt, const char *arg, int unset)
{
	if (unset)
		string_list_clear(&extra_cc, 0);
	else
		string_list_append(&extra_cc, arg);
	return 0;
}

static int from_callback(const struct option *opt, const char *arg, int unset)
{
	char **from = opt->value;

	free(*from);

	if (unset)
		*from = NULL;
	else if (arg)
		*from = xstrdup(arg);
	else
		*from = xstrdup(git_committer_info(IDENT_NO_DATE));
	return 0;
}

static int base_callback(const struct option *opt, const char *arg, int unset)
{
	const char **base_commit = opt->value;

	if (unset) {
		auto_base = AUTO_BASE_NEVER;
		*base_commit = NULL;
	} else if (!strcmp(arg, "auto")) {
		auto_base = AUTO_BASE_ALWAYS;
		*base_commit = NULL;
	} else {
		auto_base = AUTO_BASE_NEVER;
		*base_commit = arg;
	}
	return 0;
}

struct base_tree_info {
	struct object_id base_commit;
	int nr_patch_id, alloc_patch_id;
	struct object_id *patch_id;
};

static struct commit *get_base_commit(const char *base_commit,
				      struct commit **list,
				      int total)
{
	struct commit *base = NULL;
	struct commit **rev;
	int i = 0, rev_nr = 0, auto_select, die_on_failure;

	switch (auto_base) {
	case AUTO_BASE_NEVER:
		if (base_commit) {
			auto_select = 0;
			die_on_failure = 1;
		} else {
			/* no base information is requested */
			return NULL;
		}
		break;
	case AUTO_BASE_ALWAYS:
	case AUTO_BASE_WHEN_ABLE:
		if (base_commit) {
			BUG("requested automatic base selection but a commit was provided");
		} else {
			auto_select = 1;
			die_on_failure = auto_base == AUTO_BASE_ALWAYS;
		}
		break;
	default:
		BUG("unexpected automatic base selection method");
	}

	if (!auto_select) {
		base = lookup_commit_reference_by_name(base_commit);
		if (!base)
			die(_("unknown commit %s"), base_commit);
	} else {
		struct branch *curr_branch = branch_get(NULL);
		const char *upstream = branch_get_upstream(curr_branch, NULL);
		if (upstream) {
			struct commit_list *base_list;
			struct commit *commit;
			struct object_id oid;

			if (repo_get_oid(the_repository, upstream, &oid)) {
				if (die_on_failure)
					die(_("failed to resolve '%s' as a valid ref"), upstream);
				else
					return NULL;
			}
			commit = lookup_commit_or_die(&oid, "upstream base");
			base_list = repo_get_merge_bases_many(the_repository,
							      commit, total,
							      list);
			/* There should be one and only one merge base. */
			if (!base_list || base_list->next) {
				if (die_on_failure) {
					die(_("could not find exact merge base"));
				} else {
					free_commit_list(base_list);
					return NULL;
				}
			}
			base = base_list->item;
			free_commit_list(base_list);
		} else {
			if (die_on_failure)
				die(_("failed to get upstream, if you want to record base commit automatically,\n"
				      "please use git branch --set-upstream-to to track a remote branch.\n"
				      "Or you could specify base commit by --base=<base-commit-id> manually"));
			else
				return NULL;
		}
	}

	ALLOC_ARRAY(rev, total);
	for (i = 0; i < total; i++)
		rev[i] = list[i];

	rev_nr = total;
	/*
	 * Get merge base through pair-wise computations
	 * and store it in rev[0].
	 */
	while (rev_nr > 1) {
		for (i = 0; i < rev_nr / 2; i++) {
			struct commit_list *merge_base;
			merge_base = repo_get_merge_bases(the_repository,
							  rev[2 * i],
							  rev[2 * i + 1]);
			if (!merge_base || merge_base->next) {
				if (die_on_failure) {
					die(_("failed to find exact merge base"));
				} else {
					free(rev);
					return NULL;
				}
			}

			rev[i] = merge_base->item;
		}

		if (rev_nr % 2)
			rev[i] = rev[2 * i];
		rev_nr = DIV_ROUND_UP(rev_nr, 2);
	}

	if (!repo_in_merge_bases(the_repository, base, rev[0])) {
		if (die_on_failure) {
			die(_("base commit should be the ancestor of revision list"));
		} else {
			free(rev);
			return NULL;
		}
	}

	for (i = 0; i < total; i++) {
		if (base == list[i]) {
			if (die_on_failure) {
				die(_("base commit shouldn't be in revision list"));
			} else {
				free(rev);
				return NULL;
			}
		}
	}

	free(rev);
	return base;
}

define_commit_slab(commit_base, int);

static void prepare_bases(struct base_tree_info *bases,
			  struct commit *base,
			  struct commit **list,
			  int total)
{
	struct commit *commit;
	struct rev_info revs;
	struct diff_options diffopt;
	struct commit_base commit_base;
	int i;

	if (!base)
		return;

	init_commit_base(&commit_base);
	repo_diff_setup(the_repository, &diffopt);
	diffopt.flags.recursive = 1;
	diff_setup_done(&diffopt);

	oidcpy(&bases->base_commit, &base->object.oid);

	repo_init_revisions(the_repository, &revs, NULL);
	revs.max_parents = 1;
	revs.topo_order = 1;
	for (i = 0; i < total; i++) {
		list[i]->object.flags &= ~UNINTERESTING;
		add_pending_object(&revs, &list[i]->object, "rev_list");
		*commit_base_at(&commit_base, list[i]) = 1;
	}
	base->object.flags |= UNINTERESTING;
	add_pending_object(&revs, &base->object, "base");

	if (prepare_revision_walk(&revs))
		die(_("revision walk setup failed"));
	/*
	 * Traverse the commits list, get prerequisite patch ids
	 * and stuff them in bases structure.
	 */
	while ((commit = get_revision(&revs)) != NULL) {
		struct object_id oid;
		struct object_id *patch_id;
		if (*commit_base_at(&commit_base, commit))
			continue;
		if (commit_patch_id(commit, &diffopt, &oid, 0))
			die(_("cannot get patch id"));
		ALLOC_GROW(bases->patch_id, bases->nr_patch_id + 1, bases->alloc_patch_id);
		patch_id = bases->patch_id + bases->nr_patch_id;
		oidcpy(patch_id, &oid);
		bases->nr_patch_id++;
	}
	clear_commit_base(&commit_base);
}

static void print_bases(struct base_tree_info *bases, FILE *file)
{
	int i;

	/* Only do this once, either for the cover or for the first one */
	if (is_null_oid(&bases->base_commit))
		return;

	/* Show the base commit */
	fprintf(file, "\nbase-commit: %s\n", oid_to_hex(&bases->base_commit));

	/* Show the prerequisite patches */
	for (i = bases->nr_patch_id - 1; i >= 0; i--)
		fprintf(file, "prerequisite-patch-id: %s\n", oid_to_hex(&bases->patch_id[i]));

	free(bases->patch_id);
	bases->nr_patch_id = 0;
	bases->alloc_patch_id = 0;
	oidclr(&bases->base_commit);
}

static const char *diff_title(struct strbuf *sb,
			      const char *reroll_count,
			      const char *generic,
			      const char *rerolled)
{
	int v;

	/* RFC may be v0, so allow -v1 to diff against v0 */
	if (reroll_count && !strtol_i(reroll_count, 10, &v) &&
	    v >= 1)
		strbuf_addf(sb, rerolled, v - 1);
	else
		strbuf_addstr(sb, generic);
	return sb->buf;
}

static void infer_range_diff_ranges(struct strbuf *r1,
				    struct strbuf *r2,
				    const char *prev,
				    struct commit *origin,
				    struct commit *head)
{
	const char *head_oid = oid_to_hex(&head->object.oid);
	int prev_is_range = is_range_diff_range(prev);

	if (prev_is_range)
		strbuf_addstr(r1, prev);
	else
		strbuf_addf(r1, "%s..%s", head_oid, prev);

	if (origin)
		strbuf_addf(r2, "%s..%s", oid_to_hex(&origin->object.oid), head_oid);
	else if (prev_is_range)
		die(_("failed to infer range-diff origin of current series"));
	else {
		warning(_("using '%s' as range-diff origin of current series"), prev);
		strbuf_addf(r2, "%s..%s", prev, head_oid);
	}
}

int cmd_format_patch(int argc, const char **argv, const char *prefix)
{
	struct commit *commit;
	struct commit **list = NULL;
	struct rev_info rev;
	char *to_free = NULL;
	struct setup_revision_opt s_r_opt;
	int nr = 0, total, i;
	int use_stdout = 0;
	int start_number = -1;
	int just_numbers = 0;
	int ignore_if_in_upstream = 0;
	int cover_letter = -1;
	int boundary_count = 0;
	int no_binary_diff = 0;
	int zero_commit = 0;
	struct commit *origin = NULL;
	const char *in_reply_to = NULL;
	struct patch_ids ids;
	struct strbuf buf = STRBUF_INIT;
	int use_patch_format = 0;
	int quiet = 0;
	const char *reroll_count = NULL;
	char *cover_from_description_arg = NULL;
	char *branch_name = NULL;
	char *base_commit = NULL;
	struct base_tree_info bases;
	struct commit *base;
	int show_progress = 0;
	struct progress *progress = NULL;
	struct oid_array idiff_prev = OID_ARRAY_INIT;
	struct strbuf idiff_title = STRBUF_INIT;
	const char *rdiff_prev = NULL;
	struct strbuf rdiff1 = STRBUF_INIT;
	struct strbuf rdiff2 = STRBUF_INIT;
	struct strbuf rdiff_title = STRBUF_INIT;
	struct strbuf sprefix = STRBUF_INIT;
	int creation_factor = -1;

	const struct option builtin_format_patch_options[] = {
		OPT_CALLBACK_F('n', "numbered", &numbered, NULL,
			    N_("use [PATCH n/m] even with a single patch"),
			    PARSE_OPT_NOARG, numbered_callback),
		OPT_CALLBACK_F('N', "no-numbered", &numbered, NULL,
			    N_("use [PATCH] even with multiple patches"),
			    PARSE_OPT_NOARG | PARSE_OPT_NONEG, no_numbered_callback),
		OPT_BOOL('s', "signoff", &do_signoff, N_("add a Signed-off-by trailer")),
		OPT_BOOL(0, "stdout", &use_stdout,
			    N_("print patches to standard out")),
		OPT_BOOL(0, "cover-letter", &cover_letter,
			    N_("generate a cover letter")),
		OPT_BOOL(0, "numbered-files", &just_numbers,
			    N_("use simple number sequence for output file names")),
		OPT_STRING(0, "suffix", &fmt_patch_suffix, N_("sfx"),
			    N_("use <sfx> instead of '.patch'")),
		OPT_INTEGER(0, "start-number", &start_number,
			    N_("start numbering patches at <n> instead of 1")),
		OPT_STRING('v', "reroll-count", &reroll_count, N_("reroll-count"),
			    N_("mark the series as Nth re-roll")),
		OPT_INTEGER(0, "filename-max-length", &fmt_patch_name_max,
			    N_("max length of output filename")),
		OPT_CALLBACK_F(0, "rfc", &rev, NULL,
			    N_("use [RFC PATCH] instead of [PATCH]"),
			    PARSE_OPT_NOARG | PARSE_OPT_NONEG, rfc_callback),
		OPT_STRING(0, "cover-from-description", &cover_from_description_arg,
			    N_("cover-from-description-mode"),
			    N_("generate parts of a cover letter based on a branch's description")),
		OPT_CALLBACK_F(0, "subject-prefix", &rev, N_("prefix"),
			    N_("use [<prefix>] instead of [PATCH]"),
			    PARSE_OPT_NONEG, subject_prefix_callback),
		OPT_CALLBACK_F('o', "output-directory", &output_directory,
			    N_("dir"), N_("store resulting files in <dir>"),
			    PARSE_OPT_NONEG, output_directory_callback),
		OPT_CALLBACK_F('k', "keep-subject", &rev, NULL,
			    N_("don't strip/add [PATCH]"),
			    PARSE_OPT_NOARG | PARSE_OPT_NONEG, keep_callback),
		OPT_BOOL(0, "no-binary", &no_binary_diff,
			 N_("don't output binary diffs")),
		OPT_BOOL(0, "zero-commit", &zero_commit,
			 N_("output all-zero hash in From header")),
		OPT_BOOL(0, "ignore-if-in-upstream", &ignore_if_in_upstream,
			 N_("don't include a patch matching a commit upstream")),
		OPT_SET_INT_F('p', "no-stat", &use_patch_format,
			      N_("show patch format instead of default (patch + stat)"),
			      1, PARSE_OPT_NONEG),
		OPT_GROUP(N_("Messaging")),
		OPT_CALLBACK(0, "add-header", NULL, N_("header"),
			    N_("add email header"), header_callback),
		OPT_CALLBACK(0, "to", NULL, N_("email"), N_("add To: header"), to_callback),
		OPT_CALLBACK(0, "cc", NULL, N_("email"), N_("add Cc: header"), cc_callback),
		OPT_CALLBACK_F(0, "from", &from, N_("ident"),
			    N_("set From address to <ident> (or committer ident if absent)"),
			    PARSE_OPT_OPTARG, from_callback),
		OPT_STRING(0, "in-reply-to", &in_reply_to, N_("message-id"),
			    N_("make first mail a reply to <message-id>")),
		OPT_CALLBACK_F(0, "attach", &rev, N_("boundary"),
			    N_("attach the patch"), PARSE_OPT_OPTARG,
			    attach_callback),
		OPT_CALLBACK_F(0, "inline", &rev, N_("boundary"),
			    N_("inline the patch"),
			    PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
			    inline_callback),
		OPT_CALLBACK_F(0, "thread", &thread, N_("style"),
			    N_("enable message threading, styles: shallow, deep"),
			    PARSE_OPT_OPTARG, thread_callback),
		OPT_STRING(0, "signature", &signature, N_("signature"),
			    N_("add a signature")),
		OPT_CALLBACK_F(0, "base", &base_commit, N_("base-commit"),
			       N_("add prerequisite tree info to the patch series"),
			       0, base_callback),
		OPT_FILENAME(0, "signature-file", &signature_file,
				N_("add a signature from a file")),
		OPT__QUIET(&quiet, N_("don't print the patch filenames")),
		OPT_BOOL(0, "progress", &show_progress,
			 N_("show progress while generating patches")),
		OPT_CALLBACK(0, "interdiff", &idiff_prev, N_("rev"),
			     N_("show changes against <rev> in cover letter or single patch"),
			     parse_opt_object_name),
		OPT_STRING(0, "range-diff", &rdiff_prev, N_("refspec"),
			   N_("show changes against <refspec> in cover letter or single patch")),
		OPT_INTEGER(0, "creation-factor", &creation_factor,
			    N_("percentage by which creation is weighted")),
		OPT_BOOL(0, "force-in-body-from", &force_in_body_from,
			 N_("show in-body From: even if identical to the e-mail header")),
		OPT_END()
	};

	extra_hdr.strdup_strings = 1;
	extra_to.strdup_strings = 1;
	extra_cc.strdup_strings = 1;

	init_log_defaults();
	init_display_notes(&notes_opt);
	git_config(git_format_config, NULL);
	repo_init_revisions(the_repository, &rev, prefix);
	git_config(grep_config, &rev.grep_filter);

	rev.show_notes = show_notes;
	memcpy(&rev.notes_opt, &notes_opt, sizeof(notes_opt));
	rev.commit_format = CMIT_FMT_EMAIL;
	rev.encode_email_headers = default_encode_email_headers;
	rev.expand_tabs_in_log_default = 0;
	rev.verbose_header = 1;
	rev.diff = 1;
	rev.max_parents = 1;
	rev.diffopt.flags.recursive = 1;
	rev.diffopt.no_free = 1;
	rev.subject_prefix = fmt_patch_subject_prefix;
	memset(&s_r_opt, 0, sizeof(s_r_opt));
	s_r_opt.def = "HEAD";
	s_r_opt.revarg_opt = REVARG_COMMITTISH;

	if (format_no_prefix)
		diff_set_noprefix(&rev.diffopt);

	if (default_attach) {
		rev.mime_boundary = default_attach;
		rev.no_inline = 1;
	}

	/*
	 * Parse the arguments before setup_revisions(), or something
	 * like "git format-patch -o a123 HEAD^.." may fail; a123 is
	 * possibly a valid SHA1.
	 */
	argc = parse_options(argc, argv, prefix, builtin_format_patch_options,
			     builtin_format_patch_usage,
			     PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN_OPT |
			     PARSE_OPT_KEEP_DASHDASH);

	rev.force_in_body_from = force_in_body_from;

	/* Make sure "0000-$sub.patch" gives non-negative length for $sub */
	if (fmt_patch_name_max <= strlen("0000-") + strlen(fmt_patch_suffix))
		fmt_patch_name_max = strlen("0000-") + strlen(fmt_patch_suffix);

	if (cover_from_description_arg)
		cover_from_description_mode = parse_cover_from_description(cover_from_description_arg);

	if (reroll_count) {
		strbuf_addf(&sprefix, "%s v%s",
			    rev.subject_prefix, reroll_count);
		rev.reroll_count = reroll_count;
		rev.subject_prefix = sprefix.buf;
	}

	for (i = 0; i < extra_hdr.nr; i++) {
		strbuf_addstr(&buf, extra_hdr.items[i].string);
		strbuf_addch(&buf, '\n');
	}

	if (extra_to.nr)
		strbuf_addstr(&buf, "To: ");
	for (i = 0; i < extra_to.nr; i++) {
		if (i)
			strbuf_addstr(&buf, "    ");
		strbuf_addstr(&buf, extra_to.items[i].string);
		if (i + 1 < extra_to.nr)
			strbuf_addch(&buf, ',');
		strbuf_addch(&buf, '\n');
	}

	if (extra_cc.nr)
		strbuf_addstr(&buf, "Cc: ");
	for (i = 0; i < extra_cc.nr; i++) {
		if (i)
			strbuf_addstr(&buf, "    ");
		strbuf_addstr(&buf, extra_cc.items[i].string);
		if (i + 1 < extra_cc.nr)
			strbuf_addch(&buf, ',');
		strbuf_addch(&buf, '\n');
	}

	rev.extra_headers = to_free = strbuf_detach(&buf, NULL);

	if (from) {
		if (split_ident_line(&rev.from_ident, from, strlen(from)))
			die(_("invalid ident line: %s"), from);
	}

	if (start_number < 0)
		start_number = 1;

	/*
	 * If numbered is set solely due to format.numbered in config,
	 * and it would conflict with --keep-subject (-k) from the
	 * command line, reset "numbered".
	 */
	if (numbered && keep_subject && !numbered_cmdline_opt)
		numbered = 0;

	if (numbered && keep_subject)
		die(_("options '%s' and '%s' cannot be used together"), "-n", "-k");
	if (keep_subject && subject_prefix)
		die(_("options '%s' and '%s' cannot be used together"), "--subject-prefix/--rfc", "-k");
	rev.preserve_subject = keep_subject;

	argc = setup_revisions(argc, argv, &rev, &s_r_opt);
	if (argc > 1)
		die(_("unrecognized argument: %s"), argv[1]);

	if (rev.diffopt.output_format & DIFF_FORMAT_NAME)
		die(_("--name-only does not make sense"));
	if (rev.diffopt.output_format & DIFF_FORMAT_NAME_STATUS)
		die(_("--name-status does not make sense"));
	if (rev.diffopt.output_format & DIFF_FORMAT_CHECKDIFF)
		die(_("--check does not make sense"));
	if (rev.remerge_diff)
		die(_("--remerge-diff does not make sense"));

	if (!use_patch_format &&
		(!rev.diffopt.output_format ||
		 rev.diffopt.output_format == DIFF_FORMAT_PATCH))
		rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY;
	if (!rev.diffopt.stat_width)
		rev.diffopt.stat_width = MAIL_DEFAULT_WRAP;

	/* Always generate a patch */
	rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
	rev.always_show_header = 1;

	rev.zero_commit = zero_commit;
	rev.patch_name_max = fmt_patch_name_max;

	if (!rev.diffopt.flags.text && !no_binary_diff)
		rev.diffopt.flags.binary = 1;

	if (rev.show_notes)
		load_display_notes(&rev.notes_opt);

	die_for_incompatible_opt3(use_stdout, "--stdout",
				  rev.diffopt.close_file, "--output",
				  !!output_directory, "--output-directory");

	if (use_stdout && stdout_mboxrd)
		rev.commit_format = CMIT_FMT_MBOXRD;

	if (use_stdout) {
		setup_pager();
	} else if (!rev.diffopt.close_file) {
		int saved;

		if (!output_directory)
			output_directory = config_output_directory;
		output_directory = set_outdir(prefix, output_directory);

		if (rev.diffopt.use_color != GIT_COLOR_ALWAYS)
			rev.diffopt.use_color = GIT_COLOR_NEVER;
		/*
		 * We consider <outdir> as 'outside of gitdir', therefore avoid
		 * applying adjust_shared_perm in s-c-l-d.
		 */
		saved = get_shared_repository();
		set_shared_repository(0);
		switch (safe_create_leading_directories_const(output_directory)) {
		case SCLD_OK:
		case SCLD_EXISTS:
			break;
		default:
			die(_("could not create leading directories "
			      "of '%s'"), output_directory);
		}
		set_shared_repository(saved);
		if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
			die_errno(_("could not create directory '%s'"),
				  output_directory);
	}

	if (rev.pending.nr == 1) {
		int check_head = 0;

		if (rev.max_count < 0 && !rev.show_root_diff) {
			/*
			 * This is traditional behaviour of "git format-patch
			 * origin" that prepares what the origin side still
			 * does not have.
			 */
			rev.pending.objects[0].item->flags |= UNINTERESTING;
			add_head_to_pending(&rev);
			check_head = 1;
		}
		/*
		 * Otherwise, it is "format-patch -22 HEAD", and/or
		 * "format-patch --root HEAD".  The user wants
		 * get_revision() to do the usual traversal.
		 */

		if (!strcmp(rev.pending.objects[0].name, "HEAD"))
			check_head = 1;

		if (check_head) {
			const char *ref, *v;
			ref = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
						 NULL, NULL);
			if (ref && skip_prefix(ref, "refs/heads/", &v))
				branch_name = xstrdup(v);
			else
				branch_name = xstrdup(""); /* no branch */
		}
	}

	/*
	 * We cannot move this anywhere earlier because we do want to
	 * know if --root was given explicitly from the command line.
	 */
	rev.show_root_diff = 1;

	if (ignore_if_in_upstream) {
		/* Don't say anything if head and upstream are the same. */
		if (rev.pending.nr == 2) {
			struct object_array_entry *o = rev.pending.objects;
			if (oideq(&o[0].item->oid, &o[1].item->oid))
				goto done;
		}
		get_patch_ids(&rev, &ids);
	}

	if (prepare_revision_walk(&rev))
		die(_("revision walk setup failed"));
	rev.boundary = 1;
	while ((commit = get_revision(&rev)) != NULL) {
		if (commit->object.flags & BOUNDARY) {
			boundary_count++;
			origin = (boundary_count == 1) ? commit : NULL;
			continue;
		}

		if (ignore_if_in_upstream && has_commit_patch_id(commit, &ids))
			continue;

		nr++;
		REALLOC_ARRAY(list, nr);
		list[nr - 1] = commit;
	}
	if (nr == 0)
		/* nothing to do */
		goto done;
	total = nr;
	if (cover_letter == -1) {
		if (config_cover_letter == COVER_AUTO)
			cover_letter = (total > 1);
		else
			cover_letter = (config_cover_letter == COVER_ON);
	}
	if (!keep_subject && auto_number && (total > 1 || cover_letter))
		numbered = 1;
	if (numbered)
		rev.total = total + start_number - 1;

	if (idiff_prev.nr) {
		if (!cover_letter && total != 1)
			die(_("--interdiff requires --cover-letter or single patch"));
		rev.idiff_oid1 = &idiff_prev.oid[idiff_prev.nr - 1];
		rev.idiff_oid2 = get_commit_tree_oid(list[0]);
		rev.idiff_title = diff_title(&idiff_title, reroll_count,
					     _("Interdiff:"),
					     _("Interdiff against v%d:"));
	}

	if (creation_factor < 0)
		creation_factor = RANGE_DIFF_CREATION_FACTOR_DEFAULT;
	else if (!rdiff_prev)
		die(_("the option '%s' requires '%s'"), "--creation-factor", "--range-diff");

	if (rdiff_prev) {
		if (!cover_letter && total != 1)
			die(_("--range-diff requires --cover-letter or single patch"));

		infer_range_diff_ranges(&rdiff1, &rdiff2, rdiff_prev,
					origin, list[0]);
		rev.rdiff1 = rdiff1.buf;
		rev.rdiff2 = rdiff2.buf;
		rev.creation_factor = creation_factor;
		rev.rdiff_title = diff_title(&rdiff_title, reroll_count,
					     _("Range-diff:"),
					     _("Range-diff against v%d:"));
	}

	if (!signature) {
		; /* --no-signature inhibits all signatures */
	} else if (signature && signature != git_version_string) {
		; /* non-default signature already set */
	} else if (signature_file) {
		struct strbuf buf = STRBUF_INIT;

		if (strbuf_read_file(&buf, signature_file, 128) < 0)
			die_errno(_("unable to read signature file '%s'"), signature_file);
		signature = strbuf_detach(&buf, NULL);
	}

	memset(&bases, 0, sizeof(bases));
	base = get_base_commit(base_commit, list, nr);
	if (base) {
		reset_revision_walk();
		clear_object_flags(UNINTERESTING);
		prepare_bases(&bases, base, list, nr);
	}

	if (in_reply_to || thread || cover_letter) {
		rev.ref_message_ids = xmalloc(sizeof(*rev.ref_message_ids));
		string_list_init_nodup(rev.ref_message_ids);
	}
	if (in_reply_to) {
		const char *msgid = clean_message_id(in_reply_to);
		string_list_append(rev.ref_message_ids, msgid);
	}
	rev.numbered_files = just_numbers;
	rev.patch_suffix = fmt_patch_suffix;
	if (cover_letter) {
		if (thread)
			gen_message_id(&rev, "cover");
		make_cover_letter(&rev, !!output_directory,
				  origin, nr, list, branch_name, quiet);
		print_bases(&bases, rev.diffopt.file);
		print_signature(rev.diffopt.file);
		total++;
		start_number--;
		/* interdiff/range-diff in cover-letter; omit from patches */
		rev.idiff_oid1 = NULL;
		rev.rdiff1 = NULL;
	}
	rev.add_signoff = do_signoff;

	if (show_progress)
		progress = start_delayed_progress(_("Generating patches"), total);
	while (0 <= --nr) {
		int shown;
		display_progress(progress, total - nr);
		commit = list[nr];
		rev.nr = total - nr + (start_number - 1);
		/* Make the second and subsequent mails replies to the first */
		if (thread) {
			/* Have we already had a message ID? */
			if (rev.message_id) {
				/*
				 * For deep threading: make every mail
				 * a reply to the previous one, no
				 * matter what other options are set.
				 *
				 * For shallow threading:
				 *
				 * Without --cover-letter and
				 * --in-reply-to, make every mail a
				 * reply to the one before.
				 *
				 * With --in-reply-to but no
				 * --cover-letter, make every mail a
				 * reply to the <reply-to>.
				 *
				 * With --cover-letter, make every
				 * mail but the cover letter a reply
				 * to the cover letter.  The cover
				 * letter is a reply to the
				 * --in-reply-to, if specified.
				 */
				if (thread == THREAD_SHALLOW
				    && rev.ref_message_ids->nr > 0
				    && (!cover_letter || rev.nr > 1))
					free(rev.message_id);
				else
					string_list_append(rev.ref_message_ids,
							   rev.message_id);
			}
			gen_message_id(&rev, oid_to_hex(&commit->object.oid));
		}

		if (output_directory &&
		    open_next_file(rev.numbered_files ? NULL : commit, NULL, &rev, quiet))
			die(_("failed to create output files"));
		shown = log_tree_commit(&rev, commit);
		free_commit_buffer(the_repository->parsed_objects,
				   commit);

		/* We put one extra blank line between formatted
		 * patches and this flag is used by log-tree code
		 * to see if it needs to emit a LF before showing
		 * the log; when using one file per patch, we do
		 * not want the extra blank line.
		 */
		if (output_directory)
			rev.shown_one = 0;
		if (shown) {
			print_bases(&bases, rev.diffopt.file);
			if (rev.mime_boundary)
				fprintf(rev.diffopt.file, "\n--%s%s--\n\n\n",
				       mime_boundary_leader,
				       rev.mime_boundary);
			else
				print_signature(rev.diffopt.file);
		}
		if (output_directory)
			fclose(rev.diffopt.file);
	}
	stop_progress(&progress);
	free(list);
	free(branch_name);
	string_list_clear(&extra_to, 0);
	string_list_clear(&extra_cc, 0);
	string_list_clear(&extra_hdr, 0);
	if (ignore_if_in_upstream)
		free_patch_ids(&ids);

done:
	oid_array_clear(&idiff_prev);
	strbuf_release(&idiff_title);
	strbuf_release(&rdiff1);
	strbuf_release(&rdiff2);
	strbuf_release(&rdiff_title);
	strbuf_release(&sprefix);
	free(to_free);
	if (rev.ref_message_ids)
		string_list_clear(rev.ref_message_ids, 0);
	free(rev.ref_message_ids);
	return cmd_log_deinit(0, &rev);
}

static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
{
	struct object_id oid;
	if (repo_get_oid(the_repository, arg, &oid) == 0) {
		struct commit *commit = lookup_commit_reference(the_repository,
								&oid);
		if (commit) {
			commit->object.flags |= flags;
			add_pending_object(revs, &commit->object, arg);
			return 0;
		}
	}
	return -1;
}

static const char * const cherry_usage[] = {
	N_("git cherry [-v] [<upstream> [<head> [<limit>]]]"),
	NULL
};

static void print_commit(char sign, struct commit *commit, int verbose,
			 int abbrev, FILE *file)
{
	if (!verbose) {
		fprintf(file, "%c %s\n", sign,
		       repo_find_unique_abbrev(the_repository, &commit->object.oid, abbrev));
	} else {
		struct strbuf buf = STRBUF_INIT;
		pp_commit_easy(CMIT_FMT_ONELINE, commit, &buf);
		fprintf(file, "%c %s %s\n", sign,
		       repo_find_unique_abbrev(the_repository, &commit->object.oid, abbrev),
		       buf.buf);
		strbuf_release(&buf);
	}
}

int cmd_cherry(int argc, const char **argv, const char *prefix)
{
	struct rev_info revs;
	struct patch_ids ids;
	struct commit *commit;
	struct commit_list *list = NULL;
	struct branch *current_branch;
	const char *upstream;
	const char *head = "HEAD";
	const char *limit = NULL;
	int verbose = 0, abbrev = 0;

	struct option options[] = {
		OPT__ABBREV(&abbrev),
		OPT__VERBOSE(&verbose, N_("be verbose")),
		OPT_END()
	};

	argc = parse_options(argc, argv, prefix, options, cherry_usage, 0);

	switch (argc) {
	case 3:
		limit = argv[2];
		/* FALLTHROUGH */
	case 2:
		head = argv[1];
		/* FALLTHROUGH */
	case 1:
		upstream = argv[0];
		break;
	default:
		current_branch = branch_get(NULL);
		upstream = branch_get_upstream(current_branch, NULL);
		if (!upstream) {
			fprintf(stderr, _("Could not find a tracked"
					" remote branch, please"
					" specify <upstream> manually.\n"));
			usage_with_options(cherry_usage, options);
		}
	}

	repo_init_revisions(the_repository, &revs, prefix);
	revs.max_parents = 1;

	if (add_pending_commit(head, &revs, 0))
		die(_("unknown commit %s"), head);
	if (add_pending_commit(upstream, &revs, UNINTERESTING))
		die(_("unknown commit %s"), upstream);

	/* Don't say anything if head and upstream are the same. */
	if (revs.pending.nr == 2) {
		struct object_array_entry *o = revs.pending.objects;
		if (oideq(&o[0].item->oid, &o[1].item->oid))
			return 0;
	}

	get_patch_ids(&revs, &ids);

	if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
		die(_("unknown commit %s"), limit);

	/* reverse the list of commits */
	if (prepare_revision_walk(&revs))
		die(_("revision walk setup failed"));
	while ((commit = get_revision(&revs)) != NULL) {
		commit_list_insert(commit, &list);
	}

	while (list) {
		char sign = '+';

		commit = list->item;
		if (has_commit_patch_id(commit, &ids))
			sign = '-';
		print_commit(sign, commit, verbose, abbrev, revs.diffopt.file);
		list = list->next;
	}

	free_patch_ids(&ids);
	return 0;
}

debug log:

solving 6ac4081d4c ...
found 6ac4081d4c in https://80x24.org/lore/git/20230516170932.1358685-7-calvinwan@google.com/
found 4f162ff4d0 in https://80x24.org/lore/pub/scm/git/git.git/
preparing index
index prepared:
100644 4f162ff4d0cbb4dbc90330dfacbb714ca543a1e8	builtin/log.c

applying [1/1] https://80x24.org/lore/git/20230516170932.1358685-7-calvinwan@google.com/
diff --git a/builtin/log.c b/builtin/log.c
index 4f162ff4d0..6ac4081d4c 100644

Checking patch builtin/log.c...
Applied patch builtin/log.c cleanly.

index at:
100644 6ac4081d4c18d0aacfd4b57f650de21053b5e056	builtin/log.c

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).