summaryrefslogtreecommitdiff
path: root/dgit
blob: 9b895b0350a7bc0cbf8b635b6c60779e648a1b24 (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
2054
2055
#!/usr/bin/perl -w
# dgit
# Integration between git and Debian-style archives
#
# Copyright (C)2013 Ian Jackson
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

use strict;

use IO::Handle;
use Data::Dumper;
use LWP::UserAgent;
use Dpkg::Control::Hash;
use File::Path;
use File::Temp qw(tempdir);
use File::Basename;
use Dpkg::Version;
use POSIX;
use IPC::Open2;

our $our_version = 'UNRELEASED'; ###substituted###

our $isuite = 'unstable';
our $idistro;
our $package;
our @ropts;

our $sign = 1;
our $dryrun_level = 0;
our $changesfile;
our $new_package = 0;
our $ignoredirty = 0;
our $noquilt = 0;
our $existing_package = 'dpkg';
our $cleanmode = 'dpkg-source';
our $changes_since_version;
our $we_are_responder;
our $initiator_tempdir;

our %format_ok = map { $_=>1 } ("1.0","3.0 (native)","3.0 (quilt)");

our (@git) = qw(git);
our (@dget) = qw(dget);
our (@dput) = qw(dput);
our (@debsign) = qw(debsign);
our (@gpg) = qw(gpg);
our (@sbuild) = qw(sbuild -A);
our (@ssh) = 'ssh';
our (@dgit) = qw(dgit);
our (@dpkgbuildpackage) = qw(dpkg-buildpackage -i\.git/ -I.git);
our (@dpkgsource) = qw(dpkg-source -i\.git/ -I.git);
our (@dpkggenchanges) = qw(dpkg-genchanges);
our (@mergechanges) = qw(mergechanges -f);
our (@changesopts) = ('');

our %opts_opt_map = ('dget' => \@dget,
		     'dput' => \@dput,
		     'debsign' => \@debsign,
                     'gpg' => \@gpg,
                     'sbuild' => \@sbuild,
                     'ssh' => \@ssh,
                     'dgit' => \@dgit,
                     'dpkg-source' => \@dpkgsource,
                     'dpkg-buildpackage' => \@dpkgbuildpackage,
                     'dpkg-genchanges' => \@dpkggenchanges,
                     'ch' => \@changesopts,
                     'mergechanges' => \@mergechanges);

our %opts_opt_cmdonly = ('gpg' => 1);

our $keyid;

our $debug = 0;
open DEBUG, ">/dev/null" or die $!;

autoflush STDOUT 1;

our $remotename = 'dgit';
our @ourdscfield = qw(Dgit Vcs-Dgit-Master);
our $branchprefix = 'dgit';
our $csuite;

sub lbranch () { return "$branchprefix/$csuite"; }
my $lbranch_re = '^refs/heads/'.$branchprefix.'/([^/.]+)$';
sub lref () { return "refs/heads/".lbranch(); }
sub lrref () { return "refs/remotes/$remotename/$branchprefix/$csuite"; }
sub rrref () { return "refs/$branchprefix/$csuite"; }
sub debiantag ($) { 
    my ($v) = @_;
    $v =~ y/~:/_%/;
    return "debian/$v";
}

sub stripepoch ($) {
    my ($vsn) = @_;
    $vsn =~ s/^\d+\://;
    return $vsn;
}

sub dscfn ($) {
    my ($vsn) = @_;
    return "${package}_".(stripepoch $vsn).".dsc";
}

our $us = 'dgit';
our $debugprefix = '';

sub printdebug { print DEBUG $debugprefix, @_ or die $!; }

sub fail { 
    die $us.($we_are_responder ? " (build host)" : "").": @_\n";
}

sub badcfg { print STDERR "$us: invalid configuration: @_\n"; exit 12; }

sub no_such_package () {
    print STDERR "$us: package $package does not exist in suite $isuite\n";
    exit 4;
}

sub fetchspec () {
    local $csuite = '*';
    return  "+".rrref().":".lrref();
}

sub changedir ($) {
    my ($newdir) = @_;
    printdebug "CD $newdir\n";
    chdir $newdir or die "chdir: $newdir: $!";
}

#---------- remote protocol support, common ----------

# remote push initiator/responder protocol:
#  < dgit-remote-push-ready [optional extra info ignored by old initiators]
#
#  > file parsed-changelog
#  [indicates that output of dpkg-parsechangelog follows]
#  > data-block NBYTES
#  > [NBYTES bytes of data (no newline)]
#  [maybe some more blocks]
#  > data-end
#
#  > file dsc
#  [etc]
#
#  > file changes
#  [etc]
#
#  > param head HEAD
#
#  > want signed-tag
#  [indicates that signed tag is wanted]
#  < data-block NBYTES
#  < [NBYTES bytes of data (no newline)]
#  [maybe some more blocks]
#  < data-end
#  < files-end
#
#  > want signed-dsc-changes
#  < data-block NBYTES    [transfer of signed dsc]
#  [etc]
#  < data-block NBYTES    [transfer of signed changes]
#  [etc]
#  < files-end
#
#  > complete

sub badproto ($$) {
    my ($fh, $m) = @_;
    fail "connection lost: $!" if $fh->error;
    fail "protocol violation; $m not expected";
}

sub protocol_expect (&$) {
    my ($match, $fh) = @_;
    local $_;
    $_ = <$fh>;
    defined && chomp or badproto $fh, "eof";
    if (wantarray) {
	my @r = &$match;
	return @r if @r;
    } else {
	my $r = &$match;
	return $r if $r;
    }
    badproto $fh, "\`$_'";
}

sub protocol_send_file ($$) {
    my ($fh, $ourfn) = @_;
    open PF, "<", $ourfn or die "$ourfn: $!";
    for (;;) {
	my $d;
	my $got = read PF, $d, 65536;
	die "$ourfn: $!" unless defined $got;
	last if !$got;
	print $fh "data-block ".length($d)."\n" or die $!;
	print $fh $d or die $!;
    }
    PF->error and die "$ourfn $!";
    print $fh "data-end\n" or die $!;
    close PF;
}

sub protocol_read_bytes ($$) {
    my ($fh, $nbytes) = @_;
    $nbytes =~ m/^[1-9]\d{0,5}$/ or badproto \*RO, "bad byte count";
    my $d;
    my $got = read $fh, $d, $nbytes;
    $got==$nbytes or badproto $fh, "eof during data block";
    return $d;
}

sub protocol_receive_file ($$) {
    my ($fh, $ourfn) = @_;
    printdebug "() $ourfn\n";
    open PF, ">", $ourfn or die "$ourfn: $!";
    for (;;) {
	my ($y,$l) = protocol_expect {
	    m/^data-block (.*)$/ ? (1,$1) :
	    m/^data-end$/ ? (0,) :
	    ();
	} $fh;
	last unless $y;
	my $d = protocol_read_bytes $fh, $l;
	print PF $d or die $!;
    }
    close PF or die $!;
}

#---------- remote protocol support, responder ----------

sub responder_send_command ($) {
    my ($command) = @_;
    return unless $we_are_responder;
    # called even without $we_are_responder
    printdebug ">> $command\n";
    print PO $command, "\n" or die $!;
}    

sub responder_send_file ($$) {
    my ($keyword, $ourfn) = @_;
    return unless $we_are_responder;
    printdebug "]] $keyword $ourfn\n";
    responder_send_command "file $keyword";
    protocol_send_file \*PO, $ourfn;
}

sub responder_receive_files ($@) {
    my ($keyword, @ourfns) = @_;
    die unless $we_are_responder;
    printdebug "[[ $keyword @ourfns\n";
    responder_send_command "want $keyword";
    foreach my $fn (@ourfns) {
	protocol_receive_file \*PI, $fn;
    }
    printdebug "[[\$\n";
    protocol_expect { m/^files-end$/ } \*PI;
}

#---------- remote protocol support, initiator ----------

sub initiator_expect (&) {
    my ($match) = @_;
    protocol_expect { &$match } \*RO;
}

#---------- end remote code ----------

sub progress {
    if ($we_are_responder) {
	my $m = join '', @_;
	responder_send_command "progress ".length($m) or die $!;
	print PO $m or die $!;
    } else {
	print @_, "\n";
    }
}

our $ua;

sub url_get {
    if (!$ua) {
	$ua = LWP::UserAgent->new();
	$ua->env_proxy;
    }
    my $what = $_[$#_];
    progress "downloading $what...";
    my $r = $ua->get(@_) or die $!;
    return undef if $r->code == 404;
    $r->is_success or fail "failed to fetch $what: ".$r->status_line;
    return $r->decoded_content();
}

our ($dscdata,$dscurl,$dsc,$skew_warning_vsn);

sub shellquote {
    my @out;
    local $_;
    foreach my $a (@_) {
	$_ = $a;
	if (m{[^-=_./0-9a-z]}i) {
	    s{['\\]}{'\\$&'}g;
	    push @out, "'$_'";
	} else {
	    push @out, $_;
	}
    }
    return join ' ', @out;
}

sub printcmd {
    my $fh = shift @_;
    my $intro = shift @_;
    print $fh $intro," " or die $!;
    print $fh shellquote @_ or die $!;
    print $fh "\n" or die $!;
}

sub failedcmd {
    { local ($!); printcmd \*STDERR, "$_[0]: failed command:", @_ or die $!; };
    if ($!) {
	fail "failed to fork/exec: $!";
    } elsif (!($? & 0xff)) {
	fail "subprocess failed with error exit status ".($?>>8);
    } elsif ($?) {
	fail "subprocess crashed (wait status $?)";
    } else {
	fail "subprocess produced invalid output";
    }
}

sub runcmd {
    printcmd(\*DEBUG,$debugprefix."+",@_) if $debug>0;
    $!=0; $?=0;
    failedcmd @_ if system @_;
}

sub act_local () { return $dryrun_level <= 1; }
sub act_scary () { return !$dryrun_level; }

sub printdone {
    if (!$dryrun_level) {
	progress "dgit ok: @_";
    } else {
	progress "would be ok: @_ (but dry run only)";
    }
}

sub cmdoutput_errok {
    die Dumper(\@_)." ?" if grep { !defined } @_;
    printcmd(\*DEBUG,$debugprefix."|",@_) if $debug>0;
    open P, "-|", @_ or die $!;
    my $d;
    $!=0; $?=0;
    { local $/ = undef; $d = <P>; }
    die $! if P->error;
    if (!close P) { printdebug "=>!$?\n" if $debug>0; return undef; }
    chomp $d;
    $d =~ m/^.*/;
    printdebug "=> \`$&'",(length $' ? '...' : ''),"\n" if $debug>0; #';
    return $d;
}

sub cmdoutput {
    my $d = cmdoutput_errok @_;
    defined $d or failedcmd @_;
    return $d;
}

sub dryrun_report {
    printcmd(\*STDERR,$debugprefix."#",@_);
}

sub runcmd_ordryrun {
    if (act_scary()) {
	runcmd @_;
    } else {
	dryrun_report @_;
    }
}

sub runcmd_ordryrun_local {
    if (act_local()) {
	runcmd @_;
    } else {
	dryrun_report @_;
    }
}

sub shell_cmd {
    my ($first_shell, @cmd) = @_;
    return qw(sh -ec), $first_shell.'; exec "$@"', 'x', @cmd;
}

our $helpmsg = <<END;
main usages:
  dgit [dgit-opts] clone [dgit-opts] package [suite] [./dir|/dir]
  dgit [dgit-opts] fetch|pull [dgit-opts] [suite]
  dgit [dgit-opts] build [git-buildpackage-opts|dpkg-buildpackage-opts]
  dgit [dgit-opts] push [dgit-opts] [suite]
  dgit [dgit-opts] rpush build-host:build-dir ...
important dgit options:
  -k<keyid>           sign tag and package with <keyid> instead of default
  --dry-run -n        do not change anything, but go through the motions
  --damp-run -L       like --dry-run but make local changes, without signing
  --new -N            allow introducing a new package
  --debug -D          increase debug level
  -c<name>=<value>    set git config option (used directly by dgit too)
END

our $later_warning_msg = <<END;
Perhaps the upload is stuck in incoming.  Using the version from git.
END

sub badusage {
    print STDERR "$us: @_\n", $helpmsg or die $!;
    exit 8;
}

sub nextarg {
    @ARGV or badusage "too few arguments";
    return scalar shift @ARGV;
}

sub cmd_help () {
    print $helpmsg or die $!;
    exit 0;
}

our $td = $ENV{DGIT_TEST_DUMMY_DIR} || "DGIT_TEST_DUMMY_DIR-unset";

our %defcfg = ('dgit.default.distro' => 'debian',
	       'dgit.default.username' => '',
	       'dgit.default.archive-query-default-component' => 'main',
	       'dgit.default.ssh' => 'ssh',
	       'dgit-distro.debian.git-host' => 'git.debian.org',
	       'dgit-distro.debian.git-proto' => 'git+ssh://',
	       'dgit-distro.debian.git-path' => '/git/dgit-repos/repos',
	       'dgit-distro.debian.git-check' => 'ssh-cmd',
	       'dgit-distro.debian.git-create' => 'ssh-cmd',
	       'dgit-distro.debian.sshpsql-host' => 'coccia.debian.org',
	       'dgit-distro.debian.sshpsql-dbname' => 'service=projectb',
	       'dgit-distro.debian.upload-host' => 'ftp-master', # for dput
	       'dgit-distro.debian.mirror' => 'http://ftp.debian.org/debian/',
	       'dgit-distro.test-dummy.ssh' => "$td/ssh",
	       'dgit-distro.test-dummy.username' => "alice",
	       'dgit-distro.test-dummy.git-check' => "ssh-cmd",
	       'dgit-distro.test-dummy.git-create' => "ssh-cmd",
	       'dgit-distro.test-dummy.git-url' => "$td/git",
	       'dgit-distro.test-dummy.git-host' => "git",
	       'dgit-distro.test-dummy.git-path' => "$td/git",
	       'dgit-distro.test-dummy.archive-query' => "dummycat:$td/aq",
	       'dgit-distro.test-dummy.mirror' => "file://$td/mirror/",
	       'dgit-distro.test-dummy.upload-host' => 'test-dummy',
               );

sub cfg {
    foreach my $c (@_) {
	return undef if $c =~ /RETURN-UNDEF/;
	my @cmd = (@git, qw(config --), $c);
	my $v;
	{
	    local ($debug) = $debug-1;
	    $v = cmdoutput_errok @cmd;
	};
	if ($?==0) {
	    return $v;
	} elsif ($?!=256) {
	    failedcmd @cmd;
	}
	my $dv = $defcfg{$c};
	return $dv if defined $dv;
    }
    badcfg "need value for one of: @_";
}

sub access_distro () {
    return cfg("dgit-suite.$isuite.distro",
	       "dgit.default.distro");
}

sub access_cfg (@) {
    my (@keys) = @_;
    my $distro = $idistro || access_distro();
    my $value = cfg(map { ("dgit-distro.$distro.$_",
			   "dgit.default.$_") } @keys);
    return $value;
}

sub string_to_ssh ($) {
    my ($spec) = @_;
    if ($spec =~ m/\s/) {
	return qw(sh -ec), 'exec '.$spec.' "$@"', 'x';
    } else {
	return ($spec);
    }
}

sub access_cfg_ssh () {
    my $gitssh = access_cfg('ssh', 'RETURN-UNDEF');
    if (!defined $gitssh) {
	return @ssh;
    } else {
	return string_to_ssh $gitssh;
    }
}

sub access_someuserhost ($) {
    my ($some) = @_;
    my $user = access_cfg("$some-user",'username');
    my $host = access_cfg("$some-host");
    return length($user) ? "$user\@$host" : $host;
}

sub access_gituserhost () {
    return access_someuserhost('git');
}

sub access_giturl () {
    my $url = access_cfg('git-url','RETURN-UNDEF');
    if (!defined $url) {
	$url =
	    access_cfg('git-proto').
	    access_gituserhost().
	    access_cfg('git-path');
    }
    return "$url/$package.git";
}	       

sub parsecontrolfh ($$@) {
    my ($fh, $desc, @opts) = @_;
    my %opts = ('name' => $desc, @opts);
    my $c = Dpkg::Control::Hash->new(%opts);
    $c->parse($fh) or die "parsing of $desc failed";
    return $c;
}

sub parsecontrol {
    my ($file, $desc) = @_;
    my $fh = new IO::Handle;
    open $fh, '<', $file or die "$file: $!";
    my $c = parsecontrolfh($fh,$desc);
    $fh->error and die $!;
    close $fh;
    return $c;
}

sub getfield ($$) {
    my ($dctrl,$field) = @_;
    my $v = $dctrl->{$field};
    return $v if defined $v;
    fail "missing field $field in ".$v->get_option('name');
}

sub parsechangelog {
    my $c = Dpkg::Control::Hash->new();
    my $p = new IO::Handle;
    my @cmd = (qw(dpkg-parsechangelog), @_);
    open $p, '-|', @cmd or die $!;
    $c->parse($p);
    $?=0; $!=0; close $p or failedcmd @cmd;
    return $c;
}

sub git_get_ref ($) {
    my ($refname) = @_;
    my $got = cmdoutput_errok @git, qw(show-ref --), $refname;
    if (!defined $got) {
	$?==256 or fail "git show-ref failed (status $?)";
	printdebug "ref $refname= [show-ref exited 1]\n";
	return '';
    }
    if ($got =~ m/^(\w+) \Q$refname\E$/m) {
	printdebug "ref $refname=$1\n";
	return $1;
    } else {
	printdebug "ref $refname= [no match]\n";
	return '';
    }
}

our %rmad;

sub archive_query ($) {
    my ($method) = @_;
    my $query = access_cfg('archive-query','RETURN-UNDEF');
    if (!defined $query) {
	my $distro = access_distro();
	if ($distro eq 'debian') {
	    $query = "sshpsql:".
		access_someuserhost('sshpsql').':'.
	        access_cfg('sshpsql-dbname');
	} else {
	    $query = "madison:$distro";
	}
    }
    $query =~ s/^(\w+):// or badcfg "invalid archive-query method \`$query'";
    my $proto = $1;
    my $data = $'; #';
    { no strict qw(refs); &{"${method}_${proto}"}($proto,$data); }
}

sub pool_dsc_subpath ($$) {
    my ($vsn,$component) = @_; # $package is implict arg
    my $prefix = substr($package, 0, $package =~ m/^l/ ? 4 : 1);
    return "/pool/$component/$prefix/$package/".dscfn($vsn);
}

sub archive_query_madison ($$) {
    my ($proto,$data) = @_;
    die unless $proto eq 'madison';
    $rmad{$package} ||= cmdoutput
	qw(rmadison -asource),"-s$isuite","-u$data",$package;
    my $rmad = $rmad{$package};
    return madison_parse($rmad);
}

sub madison_parse ($) {
    my ($rmad) = @_;
    my @out;
    foreach my $l (split /\n/, $rmad) {
	$l =~ m{^ \s*( [^ \t|]+ )\s* \|
                  \s*( [^ \t|]+ )\s* \|
                  \s*( [^ \t|/]+ )(?:/([^ \t|/]+))? \s* \|
                  \s*( [^ \t|]+ )\s* }x or die "$rmad $?";
	$1 eq $package or die "$rmad $package ?";
	my $vsn = $2;
	my $newsuite = $3;
	my $component;
	if (defined $4) {
	    $component = $4;
	} else {
	    $component = access_cfg('archive-query-default-component');
	}
	$5 eq 'source' or die "$rmad ?";
	push @out, [$vsn,pool_dsc_subpath($vsn,$component),$newsuite];
    }
    return sort { -version_compare_string($a->[0],$b->[0]); } @out;
}

sub canonicalise_suite_madison ($$) {
    # madison canonicalises for us
    my @r = archive_query_madison($_[0],$_[1]);
    @r or fail
	"unable to canonicalise suite using package $package".
	" which does not appear to exist in suite $isuite;".
	" --existing-package may help";
    return $r[0][2];
}

sub sshpsql ($$) {
    my ($data,$sql) = @_;
    $data =~ m/:/ or badcfg "invalid sshpsql method string \`$data'";
    my ($userhost,$dbname) = ($`,$'); #';
    my @rows;
    my @cmd = (access_cfg_ssh, $userhost,
	       "export LANG=C; ".shellquote qw(psql -A), $dbname, qw(-c), $sql);
    printcmd(\*DEBUG,$debugprefix."|",@cmd) if $debug>0;
    open P, "-|", @cmd or die $!;
    while (<P>) {
	chomp or die;
	printdebug("$debugprefix>|$_|\n");
	push @rows, $_;
    }
    $!=0; $?=0; close P or die "$! $?";
    @rows or die;
    my $nrows = pop @rows;
    $nrows =~ s/^\((\d+) rows?\)$/$1/ or die "$nrows ?";
    @rows == $nrows+1 or die "$nrows ".(scalar @rows)." ?";
    @rows = map { [ split /\|/, $_ ] } @rows;
    my $ncols = scalar @{ shift @rows };
    die if grep { scalar @$_ != $ncols } @rows;
    return @rows;
}

sub sql_injection_check {
    foreach (@_) { die "$_ $& ?" if m/[']/; }
}

sub archive_query_sshpsql ($$) {
    my ($proto,$data) = @_;
    sql_injection_check $isuite, $package;
    my @rows = sshpsql($data, <<END);
        SELECT source.version, component.name, files.filename
          FROM source
          JOIN src_associations ON source.id = src_associations.source
          JOIN suite ON suite.id = src_associations.suite
          JOIN dsc_files ON dsc_files.source = source.id
          JOIN files_archive_map ON files_archive_map.file_id = dsc_files.file
          JOIN component ON component.id = files_archive_map.component_id
          JOIN files ON files.id = dsc_files.file
         WHERE ( suite.suite_name='$isuite' OR suite.codename='$isuite' )
           AND source.source='$package'
           AND files.filename LIKE '%.dsc';
END
    @rows = sort { -version_compare_string($a->[0],$b->[0]) } @rows;
    @rows = map {
	my ($vsn,$component,$filename) = @$_;
	[ $vsn, "/pool/$component/$filename" ];
    } @rows;
    return @rows;
}

sub canonicalise_suite_sshpsql ($$) {
    my ($proto,$data) = @_;
    sql_injection_check $isuite;
    my @rows = sshpsql($data, <<END);
        SELECT suite.codename
          FROM suite where suite_name='$isuite' or codename='$isuite';
END
    @rows = map { $_->[0] } @rows;
    fail "unknown suite $isuite" unless @rows;
    die "ambiguous $isuite: @rows ?" if @rows>1;
    return $rows[0];
}

sub canonicalise_suite_dummycat ($$) {
    my ($proto,$data) = @_;
    my $dpath = "$data/suite.$isuite";
    if (!open C, "<", $dpath) {
	$!==ENOENT or die "$dpath: $!";
	printdebug "dummycat canonicalise_suite $isuite $dpath ENOENT\n";
	return $isuite;
    }
    $!=0; $_ = <C>;
    chomp or die "$dpath: $!";
    close C;
    printdebug "dummycat canonicalise_suite $isuite $dpath = $_\n";
    return $_;
}

sub archive_query_dummycat ($$) {
    my ($proto,$data) = @_;
    canonicalise_suite();
    my $dpath = "$data/package.$csuite.$package";
    if (!open C, "<", $dpath) {
	$!==ENOENT or die "$dpath: $!";
	printdebug "dummycat query $csuite $package $dpath ENOENT\n";
	return ();
    }
    my @rows;
    while (<C>) {
	next if m/^\#/;
	next unless m/\S/;
	die unless chomp;
	printdebug "dummycat query $csuite $package $dpath | $_\n";
	my @row = split /\s+/, $_;
	@row==2 or die "$dpath: $_ ?";
	push @rows, \@row;
    }
    C->error and die "$dpath: $!";
    close C;
    return sort { -version_compare_string($a->[0],$b->[0]); } @rows;
}

sub canonicalise_suite () {
    return if defined $csuite;
    fail "cannot operate on $isuite suite" if $isuite eq 'UNRELEASED';
    $csuite = archive_query('canonicalise_suite');
    if ($isuite ne $csuite) {
	progress "canonical suite name for $isuite is $csuite";
    }
}

sub get_archive_dsc () {
    canonicalise_suite();
    my @vsns = archive_query('archive_query');
    foreach my $vinfo (@vsns) {
	my ($vsn,$subpath) = @$vinfo;
	$dscurl = access_cfg('mirror').$subpath;
	$dscdata = url_get($dscurl);
	if (!$dscdata) {
	    $skew_warning_vsn = $vsn if !defined $skew_warning_vsn;
	    next;
	}
	my $dscfh = new IO::File \$dscdata, '<' or die $!;
	printdebug Dumper($dscdata) if $debug>1;
	$dsc = parsecontrolfh($dscfh,$dscurl, allow_pgp=>1);
	printdebug Dumper($dsc) if $debug>1;
	my $fmt = getfield $dsc, 'Format';
	fail "unsupported source format $fmt, sorry" unless $format_ok{$fmt};
	return;
    }
    $dsc = undef;
}

sub check_for_git () {
    # returns 0 or 1
    my $how = access_cfg('git-check');
    if ($how eq 'ssh-cmd') {
	my @cmd =
	    (access_cfg_ssh, access_gituserhost(),
	     " set -e; cd ".access_cfg('git-path').";".
	     " if test -d $package.git; then echo 1; else echo 0; fi");
	my $r= cmdoutput @cmd;
	failedcmd @cmd unless $r =~ m/^[01]$/;
	return $r+0;
    } else {
	badcfg "unknown git-check \`$how'";
    }
}

sub create_remote_git_repo () {
    my $how = access_cfg('git-create');
    if ($how eq 'ssh-cmd') {
	runcmd_ordryrun
	    (access_cfg_ssh, access_gituserhost(),
	     "set -e; cd ".access_cfg('git-path').";".
	     " cp -a _template $package.git");
    } else {
	badcfg "unknown git-create \`$how'";
    }
}

our ($dsc_hash,$lastpush_hash);

our $ud = '.git/dgit/unpack';

sub prep_ud () {
    rmtree($ud);
    mkpath '.git/dgit';
    mkdir $ud or die $!;
}

sub mktree_in_ud_from_only_subdir () {
    # changes into the subdir
    my (@dirs) = <*/.>;
    die unless @dirs==1;
    $dirs[0] =~ m#^([^/]+)/\.$# or die;
    my $dir = $1;
    changedir $dir;
    fail "source package contains .git directory" if stat '.git';
    die $! unless $!==&ENOENT;
    runcmd qw(git init -q);
    rmtree('.git/objects');
    symlink '../../../../objects','.git/objects' or die $!;
    runcmd @git, qw(add -Af);
    my $tree = cmdoutput @git, qw(write-tree);
    $tree =~ m/^\w+$/ or die "$tree ?";
    return ($tree,$dir);
}

sub dsc_files_info () {
    foreach my $csumi (['Checksums-Sha256','Digest::SHA', 'new(256)'],
		       ['Checksums-Sha1',  'Digest::SHA', 'new(1)'],
		       ['Files',           'Digest::MD5', 'new()']) {
	my ($fname, $module, $method) = @$csumi;
	my $field = $dsc->{$fname};
	next unless defined $field;
	eval "use $module; 1;" or die $@;
	my @out;
	foreach (split /\n/, $field) {
	    next unless m/\S/;
	    m/^(\w+) (\d+) (\S+)$/ or
		fail "could not parse .dsc $fname line \`$_'";
	    my $digester = eval "$module"."->$method;" or die $@;
	    push @out, {
		Hash => $1,
		Bytes => $2,
		Filename => $3,
		Digester => $digester,
	    };
	}
	return @out;
    }
    fail "missing any supported Checksums-* or Files field in ".
	$dsc->get_option('name');
}

sub dsc_files () {
    map { $_->{Filename} } dsc_files_info();
}

sub is_orig_file ($) {
    local ($_) = @_;
    m/\.orig(?:-\w+)?\.tar\.\w+$/;
}

sub make_commit ($) {
    my ($file) = @_;
    return cmdoutput @git, qw(hash-object -w -t commit), $file;
}

sub clogp_authline ($) {
    my ($clogp) = @_;
    my $author = getfield $clogp, 'Maintainer';
    $author =~ s#,.*##ms;
    my $date = cmdoutput qw(date), '+%s %z', qw(-d), getfield($clogp,'Date');
    my $authline = "$author $date";
    $authline =~ m/^[^<>]+ \<\S+\> \d+ [-+]\d+$/ or
	fail "unexpected commit author line format \`$authline'".
	" (was generated from changelog Maintainer field)";
    return $authline;
}

sub generate_commit_from_dsc () {
    prep_ud();
    changedir $ud;
    my @files;
    foreach my $f (dsc_files()) {
	die "$f ?" if $f =~ m#/|^\.|\.dsc$|\.tmp$#;
	push @files, $f;
	link "../../../$f", $f
	    or $!==&ENOENT
	    or die "$f $!";
    }
    runcmd @dget, qw(--), $dscurl;
    foreach my $f (grep { is_orig_file($_) } @files) {
	link $f, "../../../../$f"
	    or $!==&EEXIST
	    or die "$f $!";
    }
    my ($tree,$dir) = mktree_in_ud_from_only_subdir();
    runcmd qw(sh -ec), 'dpkg-parsechangelog >../changelog.tmp';
    my $clogp = parsecontrol('../changelog.tmp',"commit's changelog");
    my $authline = clogp_authline $clogp;
    my $changes = getfield $clogp, 'Changes';
    open C, ">../commit.tmp" or die $!;
    print C <<END or die $!;
tree $tree
author $authline
committer $authline

$changes

# imported from the archive
END
    close C or die $!;
    my $outputhash = make_commit qw(../commit.tmp);
    my $cversion = getfield $clogp, 'Version';
    progress "synthesised git commit from .dsc $cversion";
    if ($lastpush_hash) {
	runcmd @git, qw(reset --hard), $lastpush_hash;
	runcmd qw(sh -ec), 'dpkg-parsechangelog >>../changelogold.tmp';
	my $oldclogp = parsecontrol('../changelogold.tmp','previous changelog');
	my $oversion = getfield $oldclogp, 'Version';
	my $vcmp =
	    version_compare_string($oversion, $cversion);
	if ($vcmp < 0) {
	    # git upload/ is earlier vsn than archive, use archive
	    open C, ">../commit2.tmp" or die $!;
	    print C <<END or die $!;
tree $tree
parent $lastpush_hash
parent $outputhash
author $authline
committer $authline

Record $package ($cversion) in archive suite $csuite
END
            $outputhash = make_commit qw(../commit2.tmp);
	} elsif ($vcmp > 0) {
	    print STDERR <<END or die $!;

Version actually in archive:    $cversion (older)
Last allegedly pushed/uploaded: $oversion (newer or same)
$later_warning_msg
END
            $outputhash = $lastpush_hash;
        } else {
	    $outputhash = $lastpush_hash;
	}
    }
    changedir '../../../..';
    runcmd @git, qw(update-ref -m),"dgit fetch import $cversion",
            'DGIT_ARCHIVE', $outputhash;
    cmdoutput @git, qw(log -n2), $outputhash;
    # ... gives git a chance to complain if our commit is malformed
    rmtree($ud);
    return $outputhash;
}

sub ensure_we_have_orig () {
    foreach my $fi (dsc_files_info()) {
	my $f = $fi->{Filename};
	next unless is_orig_file($f);
	if (open F, "<", "../$f") {
	    $fi->{Digester}->reset();
	    $fi->{Digester}->addfile(*F);
	    F->error and die $!;
	    my $got = $fi->{Digester}->hexdigest();
	    $got eq $fi->{Hash} or
		fail "existing file $f has hash $got but .dsc".
		    " demands hash $fi->{Hash}".
		    " (perhaps you should delete this file?)";
	    progress "using existing $f";
	    next;
	} else {
	    die "$f $!" unless $!==&ENOENT;
	}
	my $origurl = $dscurl;
	$origurl =~ s{/[^/]+$}{};
	$origurl .= "/$f";
	die "$f ?" unless $f =~ m/^${package}_/;
	die "$f ?" if $f =~ m#/#;
	runcmd_ordryrun_local shell_cmd 'cd ..', @dget,'--',$origurl;
    }
}

sub rev_parse ($) {
    return cmdoutput @git, qw(rev-parse), "$_[0]~0";
}

sub is_fast_fwd ($$) {
    my ($ancestor,$child) = @_;
    my @cmd = (@git, qw(merge-base), $ancestor, $child);
    my $mb = cmdoutput_errok @cmd;
    if (defined $mb) {
	return rev_parse($mb) eq rev_parse($ancestor);
    } else {
	$?==256 or failedcmd @cmd;
	return 0;
    }
}

sub git_fetch_us () {
    runcmd_ordryrun_local @git, qw(fetch),access_giturl(),fetchspec();
}

sub fetch_from_archive () {
    # ensures that lrref() is what is actually in the archive,
    #  one way or another
    get_archive_dsc();

    if ($dsc) {
	foreach my $field (@ourdscfield) {
	    $dsc_hash = $dsc->{$field};
	    last if defined $dsc_hash;
	}
	if (defined $dsc_hash) {
	    $dsc_hash =~ m/\w+/ or fail "invalid hash in .dsc \`$dsc_hash'";
	    $dsc_hash = $&;
	    progress "last upload to archive specified git hash";
	} else {
	    progress "last upload to archive has NO git hash";
	}
    } else {
	progress "no version available from the archive";
    }

    $lastpush_hash = git_get_ref(lrref());
    printdebug "previous reference hash=$lastpush_hash\n";
    my $hash;
    if (defined $dsc_hash) {
	fail "missing remote git history even though dsc has hash -".
	    " could not find ref ".lrref().
	    " (should have been fetched from ".access_giturl()."#".rrref().")"
	    unless $lastpush_hash;
	$hash = $dsc_hash;
	ensure_we_have_orig();
	if ($dsc_hash eq $lastpush_hash) {
	} elsif (is_fast_fwd($dsc_hash,$lastpush_hash)) {
	    print STDERR <<END or die $!;

Git commit in archive is behind the last version allegedly pushed/uploaded.
Commit referred to by archive:  $dsc_hash
Last allegedly pushed/uploaded: $lastpush_hash
$later_warning_msg
END
	    $hash = $lastpush_hash;
	} else {
	    fail "archive's .dsc refers to ".$dsc_hash.
		" but this is an ancestor of ".$lastpush_hash;
	}
    } elsif ($dsc) {
	$hash = generate_commit_from_dsc();
    } elsif ($lastpush_hash) {
	# only in git, not in the archive yet
	$hash = $lastpush_hash;
	print STDERR <<END or die $!;

Package not found in the archive, but has allegedly been pushed using dgit.
$later_warning_msg
END
    } else {
	printdebug "nothing found!\n";
	if (defined $skew_warning_vsn) {
	    print STDERR <<END or die $!;

Warning: relevant archive skew detected.
Archive allegedly contains $skew_warning_vsn
But we were not able to obtain any version from the archive or git.

END
	}
	return 0;
    }
    printdebug "current hash=$hash\n";
    if ($lastpush_hash) {
	fail "not fast forward on last upload branch!".
	    " (archive's version left in DGIT_ARCHIVE)"
	    unless is_fast_fwd($lastpush_hash, $hash);
    }
    if (defined $skew_warning_vsn) {
	mkpath '.git/dgit';
	printdebug "SKEW CHECK WANT $skew_warning_vsn\n";
	my $clogf = ".git/dgit/changelog.tmp";
	runcmd shell_cmd "exec >$clogf",
	    @git, qw(cat-file blob), "$hash:debian/changelog";
	my $gotclogp = parsechangelog("-l$clogf");
	my $got_vsn = getfield $gotclogp, 'Version';
	printdebug "SKEW CHECK GOT $got_vsn\n";
	if (version_compare_string($got_vsn, $skew_warning_vsn) < 0) {
	    print STDERR <<END or die $!;

Warning: archive skew detected.  Using the available version:
Archive allegedly contains    $skew_warning_vsn
We were able to obtain only   $got_vsn

END
	}
    }
    if ($lastpush_hash ne $hash) {
	my @upd_cmd = (@git, qw(update-ref -m), 'dgit fetch', lrref(), $hash);
	if (act_local()) {
	    cmdoutput @upd_cmd;
	} else {
	    dryrun_report @upd_cmd;
	}
    }
    return 1;
}

sub clone ($) {
    my ($dstdir) = @_;
    canonicalise_suite();
    badusage "dry run makes no sense with clone" unless act_local();
    mkdir $dstdir or die "$dstdir $!";
    changedir $dstdir;
    runcmd @git, qw(init -q);
    runcmd @git, qw(config), "remote.$remotename.fetch", fetchspec();
    open H, "> .git/HEAD" or die $!;
    print H "ref: ".lref()."\n" or die $!;
    close H or die $!;
    runcmd @git, qw(remote add), 'origin', access_giturl();
    if (check_for_git()) {
	progress "fetching existing git history";
	git_fetch_us();
	runcmd_ordryrun_local @git, qw(fetch origin);
    } else {
	progress "starting new git history";
    }
    fetch_from_archive() or no_such_package;
    runcmd @git, qw(reset --hard), lrref();
    printdone "ready for work in $dstdir";
}

sub fetch () {
    if (check_for_git()) {
	git_fetch_us();
    }
    fetch_from_archive() or no_such_package();
    printdone "fetched into ".lrref();
}

sub pull () {
    fetch();
    runcmd_ordryrun_local @git, qw(merge -m),"Merge from $csuite [dgit]",
        lrref();
    printdone "fetched to ".lrref()." and merged into HEAD";
}

sub check_not_dirty () {
    return if $ignoredirty;
    my @cmd = (@git, qw(diff --quiet HEAD));
    printcmd(\*DEBUG,$debugprefix."+",@cmd) if $debug>0;
    $!=0; $?=0; system @cmd;
    return if !$! && !$?;
    if (!$! && $?==256) {
	fail "working tree is dirty (does not match HEAD)";
    } else {
	failedcmd @cmd;
    }
}

sub commit_quilty_patch () {
    my $output = cmdoutput @git, qw(status --porcelain);
    my %adds;
    foreach my $l (split /\n/, $output) {
	next unless $l =~ m/\S/;
	if ($l =~ m{^(?:\?\?| M) (.pc|debian/patches)}) {
	    $adds{$1}++;
	}
    }
    if (!%adds) {
	progress "nothing quilty to commit, ok.";
	return;
    }
    runcmd_ordryrun_local @git, qw(add), sort keys %adds;
    my $m = "Commit Debian 3.0 (quilt) metadata";
    progress "$m";
    runcmd_ordryrun_local @git, qw(commit -m), $m;
}

sub madformat ($) {
    my ($format) = @_;
    return 0 unless $format eq '3.0 (quilt)';
    progress "Format \`$format', urgh";
    if ($noquilt) {
	progress "Not doing any fixup of \`$format' due to --no-quilt-fixup";
	return 0;
    }
    return 1;
}

sub push_parse_changelog ($) {
    my ($clogpfn) = @_;

    my $clogp = Dpkg::Control::Hash->new();
    $clogp->load($clogpfn) or die;

    $package = getfield $clogp, 'Source';
    my $cversion = getfield $clogp, 'Version';
    my $tag = debiantag($cversion);
    runcmd @git, qw(check-ref-format), $tag;

    my $dscfn = dscfn($cversion);

    return ($clogp, $cversion, $tag, $dscfn);
}

sub push_parse_dsc ($$$) {
    my ($dscfn,$dscfnwhat, $cversion) = @_;
    $dsc = parsecontrol($dscfn,$dscfnwhat);
    my $dversion = getfield $dsc, 'Version';
    my $dscpackage = getfield $dsc, 'Source';
    ($dscpackage eq $package && $dversion eq $cversion) or
	fail "$dscfn is for $dscpackage $dversion".
	    " but debian/changelog is for $package $cversion";
}

sub push_mktag ($$$$$$$) {
    my ($head,$clogp,$tag,
	$dscfn,
	$changesfile,$changesfilewhat,
	$tfn) = @_;

    $dsc->{$ourdscfield[0]} = $head;
    $dsc->save("$dscfn.tmp") or die $!;

    my $changes = parsecontrol($changesfile,$changesfilewhat);
    foreach my $field (qw(Source Distribution Version)) {
	$changes->{$field} eq $clogp->{$field} or
	    fail "changes field $field \`$changes->{$field}'".
	        " does not match changelog \`$clogp->{$field}'";
    }

    my $cversion = getfield $clogp, 'Version';
    my $clogsuite = getfield $clogp, 'Distribution';

    # We make the git tag by hand because (a) that makes it easier
    # to control the "tagger" (b) we can do remote signing
    my $authline = clogp_authline $clogp;
    open TO, '>', $tfn->('.tmp') or die $!;
    print TO <<END or die $!;
object $head
type commit
tag $tag
tagger $authline

$package release $cversion for $clogsuite [dgit]
END
    close TO or die $!;

    my $tagobjfn = $tfn->('.tmp');
    if ($sign) {
	if (!defined $keyid) {
	    $keyid = access_cfg('keyid','RETURN-UNDEF');
	}
	unlink $tfn->('.tmp.asc') or $!==&ENOENT or die $!;
	my @sign_cmd = (@gpg, qw(--detach-sign --armor));
	push @sign_cmd, qw(-u),$keyid if defined $keyid;
	push @sign_cmd, $tfn->('.tmp');
	runcmd_ordryrun @sign_cmd;
	if (act_scary()) {
	    $tagobjfn = $tfn->('.signed.tmp');
	    runcmd shell_cmd "exec >$tagobjfn", qw(cat --),
	        $tfn->('.tmp'), $tfn->('.tmp.asc');
	}
    }

    return ($tagobjfn);
}

sub sign_changes ($) {
    my ($changesfile) = @_;
    if ($sign) {
	my @debsign_cmd = @debsign;
	push @debsign_cmd, "-k$keyid" if defined $keyid;
	push @debsign_cmd, "-p$gpg[0]" if $gpg[0] ne 'gpg';
	push @debsign_cmd, $changesfile;
	runcmd_ordryrun @debsign_cmd;
    }
}

sub dopush () {
    printdebug "actually entering push\n";
    prep_ud();

    my $clogpfn = ".git/dgit/changelog.822.tmp";
    runcmd shell_cmd "exec >$clogpfn", qw(dpkg-parsechangelog);

    responder_send_file('parsed-changelog', $clogpfn);

    my ($clogp, $cversion, $tag, $dscfn) =
	push_parse_changelog("$clogpfn");

    stat "../$dscfn" or
	fail "looked for .dsc $dscfn, but $!;".
	    " maybe you forgot to build";

    responder_send_file('dsc', "../$dscfn");

    push_parse_dsc("../$dscfn", $dscfn, $cversion);

    my $format = getfield $dsc, 'Format';
    printdebug "format $format\n";
    if (madformat($format)) {
	commit_quilty_patch();
    }
    check_not_dirty();
    changedir $ud;
    progress "checking that $dscfn corresponds to HEAD";
    runcmd qw(dpkg-source -x --), "../../../../$dscfn";
    my ($tree,$dir) = mktree_in_ud_from_only_subdir();
    changedir '../../../..';
    my @diffcmd = (@git, qw(diff --exit-code), $tree);
    printcmd \*DEBUG,$debugprefix."+",@diffcmd;
    $!=0; $?=0;
    if (system @diffcmd) {
	if ($! && $?==256) {
	    fail "$dscfn specifies a different tree to your HEAD commit;".
		" perhaps you forgot to build";
	} else {
	    failedcmd @diffcmd;
	}
    }
#fetch from alioth
#do fast forward check and maybe fake merge
#    if (!is_fast_fwd(mainbranch
#    runcmd @git, qw(fetch -p ), "$alioth_git/$package.git",
#        map { lref($_).":".rref($_) }
#        (uploadbranch());
    my $head = rev_parse('HEAD');
    if (!$changesfile) {
	my $multi = "../${package}_".(stripepoch $cversion)."_multi.changes";
	if (stat "$multi") {
	    $changesfile = $multi;
	} else {
	    $!==&ENOENT or die "$multi: $!";
	    my $pat = "${package}_".(stripepoch $cversion)."_*.changes";
	    my @cs = glob "../$pat";
	    fail "failed to find unique changes file".
		" (looked for $pat in .., or $multi);".
		" perhaps you need to use dgit -C"
		unless @cs==1;
	    ($changesfile) = @cs;
	}
    }

    responder_send_file('changes',$changesfile);
    responder_send_command("param head $head");

    my $tfn = sub { ".git/dgit/tag$_[0]"; };
    my $tagobjfn;

    if ($we_are_responder) {
	$tagobjfn = $tfn->('.signed.tmp');
	responder_receive_files('signed-tag', $tagobjfn);
    } else {
	$tagobjfn =
	    push_mktag($head,$clogp,$tag,
		       "../$dscfn",
		       $changesfile,$changesfile,
		       $tfn);
    }

    my $tag_obj_hash = cmdoutput @git, qw(hash-object -w -t tag), $tagobjfn;
    runcmd_ordryrun @git, qw(verify-tag), $tag_obj_hash;
    runcmd_ordryrun_local @git, qw(update-ref), "refs/tags/$tag", $tag_obj_hash;
    runcmd_ordryrun @git, qw(tag -v --), $tag;

    if (!check_for_git()) {
	create_remote_git_repo();
    }
    runcmd_ordryrun @git, qw(push),access_giturl(),"HEAD:".rrref();
    runcmd_ordryrun @git, qw(update-ref -m), 'dgit push', lrref(), 'HEAD';

    if (!$we_are_responder) {
	if (act_local()) {
	    rename "../$dscfn.tmp","../$dscfn" or die "$dscfn $!";
	} else {
	    progress "[new .dsc left in $dscfn.tmp]";
	}
    }

    if ($we_are_responder) {
	my $dryrunsuffix = act_local() ? "" : ".tmp";
	responder_receive_files('signed-dsc-changes',
				"../$dscfn$dryrunsuffix",
				"$changesfile$dryrunsuffix");
    } else {
	sign_changes $changesfile;
    }

    runcmd_ordryrun @git, qw(push),access_giturl(),"refs/tags/$tag";
    my $host = access_cfg('upload-host','RETURN-UNDEF');
    my @hostarg = defined($host) ? ($host,) : ();
    runcmd_ordryrun @dput, @hostarg, $changesfile;
    printdone "pushed and uploaded $cversion";

    responder_send_command("complete");
}

sub cmd_clone {
    parseopts();
    my $dstdir;
    badusage "-p is not allowed with clone; specify as argument instead"
	if defined $package;
    if (@ARGV==1) {
	($package) = @ARGV;
    } elsif (@ARGV==2 && $ARGV[1] =~ m#^\w#) {
	($package,$isuite) = @ARGV;
    } elsif (@ARGV==2 && $ARGV[1] =~ m#^[./]#) {
	($package,$dstdir) = @ARGV;
    } elsif (@ARGV==3) {
	($package,$isuite,$dstdir) = @ARGV;
    } else {
	badusage "incorrect arguments to dgit clone";
    }
    $dstdir ||= "$package";
    clone($dstdir);
}

sub branchsuite () {
    my $branch = cmdoutput_errok @git, qw(symbolic-ref HEAD);
    if ($branch =~ m#$lbranch_re#o) {
	return $1;
    } else {
	return undef;
    }
}

sub fetchpullargs () {
    if (!defined $package) {
	my $sourcep = parsecontrol('debian/control','debian/control');
	$package = getfield $sourcep, 'Source';
    }
    if (@ARGV==0) {
#	$isuite = branchsuite();  # this doesn't work because dak hates canons
	if (!$isuite) {
	    my $clogp = parsechangelog();
	    $isuite = getfield $clogp, 'Distribution';
	}
	canonicalise_suite();
	progress "fetching from suite $csuite";
    } elsif (@ARGV==1) {
	($isuite) = @ARGV;
	canonicalise_suite();
    } else {
	badusage "incorrect arguments to dgit fetch or dgit pull";
    }
}

sub cmd_fetch {
    parseopts();
    fetchpullargs();
    fetch();
}

sub cmd_pull {
    parseopts();
    fetchpullargs();
    pull();
}

sub cmd_push {
    parseopts();
    badusage "-p is not allowed with dgit push" if defined $package;
    check_not_dirty();
    my $clogp = parsechangelog();
    $package = getfield $clogp, 'Source';
    my $specsuite;
    if (@ARGV==0) {
    } elsif (@ARGV==1) {
	($specsuite) = (@ARGV);
    } else {
	badusage "incorrect arguments to dgit push";
    }
    $isuite = getfield $clogp, 'Distribution';
    if ($new_package) {
	local ($package) = $existing_package; # this is a hack
	canonicalise_suite();
    }
    if (defined $specsuite && $specsuite ne $isuite) {
	canonicalise_suite();
	$csuite eq $specsuite or
	    fail "dgit push: changelog specifies $isuite ($csuite)".
	        " but command line specifies $specsuite";
    }
    if (check_for_git()) {
	git_fetch_us();
    }
    if (fetch_from_archive()) {
	is_fast_fwd(lrref(), 'HEAD') or
	    fail "dgit push: HEAD is not a descendant".
	        " of the archive's version.\n".
		"$us: To overwrite it, use git merge -s ours ".lrref().".";
    } else {
	$new_package or
	    fail "package appears to be new in this suite;".
	        " if this is intentional, use --new";
    }
    dopush();
}

#---------- remote commands' implementation ----------

sub cmd_remote_push_responder {
    my ($nrargs) = shift @ARGV;
    my (@rargs) = @ARGV[0..$nrargs-1];
    @ARGV = @ARGV[$nrargs..$#ARGV];
    die unless @rargs;
    my ($dir) = @rargs;
    $debugprefix = ' ';
    $we_are_responder = 1;

    open PI, "<&STDIN" or die $!;
    open STDIN, "/dev/null" or die $!;
    open PO, ">&STDOUT" or die $!;
    autoflush PO 1;
    open STDOUT, ">&STDERR" or die $!;
    autoflush STDOUT 1;

    responder_send_command("dgit-remote-push-ready");

    changedir $dir;
    &cmd_push;
}

our $i_tmp;
our $i_child_pid;

sub i_cleanup {
    local ($@);
    if ($i_child_pid) {
	printdebug "(killing remote child $i_child_pid)\n";
	kill 15, $i_child_pid;
    }
    if (defined $i_tmp && !defined $initiator_tempdir) {
	changedir "/";
	eval { rmtree $i_tmp; };
    }
}

END { i_cleanup(); }

sub i_method {
    my ($base,$selector,@args) = @_;
    $selector =~ s/\-/_/g;
    { no strict qw(refs); &{"${base}_${selector}"}(@args); }
}

sub cmd_rpush {
    my $host = nextarg;
    my $dir;
    if ($host =~ m/^((?:[^][]|\[[^][]*\])*)\:/) {
	$host = $1;
	$dir = $'; #';
    } else {
	$dir = nextarg;
    }
    $dir =~ s{^-}{./-};
    my @rargs = ($dir);
    my @rdgit;
    push @rdgit, @dgit;
    push @rdgit, @ropts;
    push @rdgit, qw(remote-push-responder), (scalar @rargs), @rargs;
    push @rdgit, @ARGV;
    my @cmd = (@ssh, $host, shellquote @rdgit);
    printcmd \*DEBUG,$debugprefix."+",@cmd;

    if (defined $initiator_tempdir) {
	rmtree $initiator_tempdir;
	mkdir $initiator_tempdir, 0700 or die "$initiator_tempdir: $!";
	$i_tmp = $initiator_tempdir;
    } else {
	$i_tmp = tempdir();
    }
    $i_child_pid = open2(\*RO, \*RI, @cmd);
    changedir $i_tmp;
    initiator_expect { m/^dgit-remote-push-ready/ };
    for (;;) {
	my ($icmd,$iargs) = initiator_expect {
	    m/^(\S+)(?: (.*))?$/;
	    ($1,$2);
	};
	i_method "i_resp", $icmd, $iargs;
    }
}

sub i_resp_progress ($) {
    my ($rhs) = @_;
    my $msg = protocol_read_bytes \*RO, $rhs;
    progress $msg;
}

sub i_resp_complete {
    my $pid = $i_child_pid;
    $i_child_pid = undef; # prevents killing some other process with same pid
    printdebug "waiting for remote child $pid...\n";
    my $got = waitpid $pid, 0;
    die $! unless $got == $pid;
    die "remote child failed $?" if $?;

    i_cleanup();
    printdebug "all done\n";
    exit 0;
}

sub i_resp_file ($) {
    my ($keyword) = @_;
    my $localname = i_method "i_localname", $keyword;
    my $localpath = "$i_tmp/$localname";
    stat $localpath and badproto \*RO, "file $keyword ($localpath) twice";
    protocol_receive_file \*RO, $localpath;
    i_method "i_file", $keyword;
}

our %i_param;

sub i_resp_param ($) {
    $_[0] =~ m/^(\S+) (.*)$/ or badproto \*RO, "bad param spec";
    $i_param{$1} = $2;
}

our %i_wanted;

sub i_resp_want ($) {
    my ($keyword) = @_;
    die "$keyword ?" if $i_wanted{$keyword}++;
    my @localpaths = i_method "i_want", $keyword;
    printdebug "[[  $keyword @localpaths\n";
    foreach my $localpath (@localpaths) {
	protocol_send_file \*RI, $localpath;
    }
    print RI "files-end\n" or die $!;
}

our ($i_clogp, $i_version, $i_tag, $i_dscfn, $i_changesfn);

sub i_localname_parsed_changelog {
    return "remote-changelog.822";
}
sub i_file_parsed_changelog {
    ($i_clogp, $i_version, $i_tag, $i_dscfn) =
	push_parse_changelog "$i_tmp/remote-changelog.822";
    die if $i_dscfn =~ m#/|^\W#;
}

sub i_localname_dsc {
    defined $i_dscfn or badproto \*RO, "dsc (before parsed-changelog)";
    return $i_dscfn;
}
sub i_file_dsc { }

sub i_localname_changes {
    defined $i_dscfn or badproto \*RO, "dsc (before parsed-changelog)";
    $i_changesfn = $i_dscfn;
    $i_changesfn =~ s/\.dsc$/_dgit.changes/ or die;
    return $i_changesfn;
}
sub i_file_changes { }

sub i_want_signed_tag {
    printdebug Dumper(\%i_param, $i_dscfn);
    defined $i_param{'head'} && defined $i_dscfn && defined $i_clogp
	or badproto \*RO, "premature desire for signed-tag";
    my $head = $i_param{'head'};
    die if $head =~ m/[^0-9a-f]/ || $head !~ m/^../;

    push_parse_dsc $i_dscfn, 'remote dsc', $i_version;

    my $tagobjfn =
	push_mktag $head, $i_clogp, $i_tag,
	    $i_dscfn,
	    $i_changesfn, 'remote changes',
	    sub { "tag$_[0]"; };

    return $tagobjfn;
}

sub i_want_signed_dsc_changes {
    rename "$i_dscfn.tmp","$i_dscfn" or die "$i_dscfn $!";
    sign_changes $i_changesfn;
    return ($i_dscfn, $i_changesfn);
}

#---------- building etc. ----------

our $version;
our $sourcechanges;
our $dscfn;

our $fakeeditorenv = 'DGIT_FAKE_EDITOR_QUILT';

sub build_maybe_quilt_fixup () {
    if (!open F, "debian/source/format") {
	die $! unless $!==&ENOENT;
	return;
    }
    $_ = <F>;
    F->error and die $!;
    chomp;
    return unless madformat($_);
    # sigh
    my $clogp = parsechangelog();
    my $version = getfield $clogp, 'Version';
    my $author = getfield $clogp, 'Maintainer';
    my $headref = rev_parse('HEAD');
    my $time = time;
    my $ncommits = 3;
    my $patchname = "auto-$version-$headref-$time";
    my $msg = cmdoutput @git, qw(log), "-n$ncommits";
    mkpath '.git/dgit';
    my $descfn = ".git/dgit/quilt-description.tmp";
    open O, '>', $descfn or die "$descfn: $!";
    $msg =~ s/\n/\n /g;
    $msg =~ s/^\s+$/ ./mg;
    print O <<END or die $!;
Description: Automatically generated patch ($clogp->{Version})
 Last (up to) $ncommits git changes, FYI:
 .
 $msg
Author: $author

---

END
    close O or die $!;
    {
	local $ENV{'EDITOR'} = cmdoutput qw(realpath --), $0;
	local $ENV{'VISUAL'} = $ENV{'EDITOR'};
	local $ENV{$fakeeditorenv} = cmdoutput qw(realpath --), $descfn;
	runcmd_ordryrun_local @dpkgsource, qw(--commit .), $patchname;
    }

    if (!open P, '>>', ".pc/applied-patches") {
	$!==&ENOENT or die $!;
    } else {
	close P;
    }

    commit_quilty_patch();
}

sub quilt_fixup_editor () {
    my $descfn = $ENV{$fakeeditorenv};
    my $editing = $ARGV[$#ARGV];
    open I1, '<', $descfn or die "$descfn: $!";
    open I2, '<', $editing or die "$editing: $!";
    unlink $editing or die "$editing: $!";
    open O, '>', $editing or die "$editing: $!";
    while (<I1>) { print O or die $!; } I1->error and die $!;
    my $copying = 0;
    while (<I2>) {
	$copying ||= m/^\-\-\- /;
	next unless $copying;
	print O or die $!;
    }
    I2->error and die $!;
    close O or die $1;
    exit 0;
}

sub build_prep () {
    badusage "-p is not allowed when building" if defined $package;
    check_not_dirty();
    my $clogp = parsechangelog();
    $isuite = getfield $clogp, 'Distribution';
    $package = getfield $clogp, 'Source';
    $version = getfield $clogp, 'Version';
    build_maybe_quilt_fixup();
}

sub changesopts () {
    my @opts =@changesopts[1..$#changesopts];
    if (!defined $changes_since_version) {
	my @vsns = archive_query('archive_query');
	if (@vsns) {
	    @vsns = map { $_->[0] } @vsns;
	    @vsns = sort { version_compare_string($a, $b) } @vsns;
	    $changes_since_version = $vsns[0];
	    progress "changelog will contain changes since $vsns[0]";
	} else {
	    $changes_since_version = '_';
	    progress "package seems new, not specifying -v<version>";
	}
    }
    if ($changes_since_version ne '_') {
	unshift @opts, "-v$changes_since_version";
    }
    return @opts;
}

sub cmd_build {
    badusage "dgit build implies --clean=dpkg-source"
	if $cleanmode ne 'dpkg-source';
    build_prep();
    runcmd_ordryrun_local @dpkgbuildpackage, qw(-us -uc), changesopts(), @ARGV;
    printdone "build successful\n";
}

sub cmd_git_build {
    badusage "dgit git-build implies --clean=dpkg-source"
	if $cleanmode ne 'dpkg-source';
    build_prep();
    my @cmd =
	(qw(git-buildpackage -us -uc --git-no-sign-tags),
	 "--git-builder=@dpkgbuildpackage");
    unless (grep { m/^--git-debian-branch|^--git-ignore-branch/ } @ARGV) {
	canonicalise_suite();
	push @cmd, "--git-debian-branch=".lbranch();
    }
    push @cmd, changesopts();
    runcmd_ordryrun_local @cmd, @ARGV;
    printdone "build successful\n";
}

sub build_source {
    build_prep();
    $sourcechanges = "${package}_".(stripepoch $version)."_source.changes";
    $dscfn = dscfn($version);
    if ($cleanmode eq 'dpkg-source') {
	runcmd_ordryrun_local (@dpkgbuildpackage, qw(-us -uc -S)),
	    changesopts();
    } else {
	if ($cleanmode eq 'git') {
	    runcmd_ordryrun_local @git, qw(clean -xdf);
	} elsif ($cleanmode eq 'none') {
	} else {
	    die "$cleanmode ?";
	}
	my $pwd = cmdoutput qw(env - pwd);
	my $leafdir = basename $pwd;
	changedir "..";
	runcmd_ordryrun_local @dpkgsource, qw(-b --), $leafdir;
	changedir $pwd;
	runcmd_ordryrun_local qw(sh -ec),
	    'exec >$1; shift; exec "$@"','x',
	    "../$sourcechanges",
	    @dpkggenchanges, qw(-S), changesopts();
    }
}

sub cmd_build_source {
    badusage "build-source takes no additional arguments" if @ARGV;
    build_source();
    printdone "source built, results in $dscfn and $sourcechanges";
}

sub cmd_sbuild {
    build_source();
    changedir "..";
    my $pat = "${package}_".(stripepoch $version)."_*.changes";
    if (act_local()) {
	stat $dscfn or fail "$dscfn (in parent directory): $!";
	stat $sourcechanges or fail "$sourcechanges (in parent directory): $!";
	foreach my $cf (glob $pat) {
	    next if $cf eq $sourcechanges;
	    unlink $cf or fail "remove $cf: $!";
	}
    }
    runcmd_ordryrun_local @sbuild, @ARGV, qw(-d), $isuite, $dscfn;
    my @changesfiles = glob $pat;
    @changesfiles = sort {
	($b =~ m/_source\.changes$/ <=> $a =~ m/_source\.changes$/)
	    or $a cmp $b
    } @changesfiles;
    fail "wrong number of different changes files (@changesfiles)"
	unless @changesfiles;
    runcmd_ordryrun_local @mergechanges, @changesfiles;
    my $multichanges = "${package}_".(stripepoch $version)."_multi.changes";
    if (act_local()) {
	stat $multichanges or fail "$multichanges: $!";
    }
    printdone "build successful, results in $multichanges\n" or die $!;
}    

sub cmd_quilt_fixup {
    badusage "incorrect arguments to dgit quilt-fixup" if @ARGV;
    my $clogp = parsechangelog();
    $version = getfield $clogp, 'Version';
    build_maybe_quilt_fixup();
}

#---------- argument parsing and main program ----------

sub cmd_version {
    print "dgit version $our_version\n" or die $!;
    exit 0;
}

sub parseopts () {
    my $om;

    if (defined $ENV{'DGIT_SSH'}) {
	@ssh = string_to_ssh $ENV{'DGIT_SSH'};
    } elsif (defined $ENV{'GIT_SSH'}) {
	@ssh = ($ENV{'GIT_SSH'});
    }

    while (@ARGV) {
	last unless $ARGV[0] =~ m/^-/;
	$_ = shift @ARGV;
	last if m/^--?$/;
	if (m/^--/) {
	    if (m/^--dry-run$/) {
		push @ropts, $_;
		$dryrun_level=2;
	    } elsif (m/^--damp-run$/) {
		push @ropts, $_;
		$dryrun_level=1;
	    } elsif (m/^--no-sign$/) {
		push @ropts, $_;
		$sign=0;
	    } elsif (m/^--help$/) {
		cmd_help();
	    } elsif (m/^--version$/) {
		cmd_version();
	    } elsif (m/^--new$/) {
		push @ropts, $_;
		$new_package=1;
	    } elsif (m/^--since-version=([^_]+|_)$/) {
		push @ropts, $_;
		$changes_since_version = $1;
	    } elsif (m/^--([-0-9a-z]+)=(.*)/s &&
		     ($om = $opts_opt_map{$1}) &&
		     length $om->[0]) {
		push @ropts, $_;
		$om->[0] = $2;
	    } elsif (m/^--([-0-9a-z]+):(.*)/s &&
		     !$opts_opt_cmdonly{$1} &&
		     ($om = $opts_opt_map{$1})) {
		push @ropts, $_;
		push @$om, $2;
	    } elsif (m/^--existing-package=(.*)/s) {
		push @ropts, $_;
		$existing_package = $1;
	    } elsif (m/^--initiator-tempdir=(.*)/s) {
		$initiator_tempdir = $1;
		$initiator_tempdir =~ m#^/# or
		    badusage "--initiator-tempdir must be used specify an".
		        " absolute, not relative, directory."
	    } elsif (m/^--distro=(.*)/s) {
		push @ropts, $_;
		$idistro = $1;
	    } elsif (m/^--clean=(dpkg-source|git|none)$/s) {
		push @ropts, $_;
		$cleanmode = $1;
	    } elsif (m/^--clean=(.*)$/s) {
		badusage "unknown cleaning mode \`$1'";
	    } elsif (m/^--ignore-dirty$/s) {
		push @ropts, $_;
		$ignoredirty = 1;
	    } elsif (m/^--no-quilt-fixup$/s) {
		push @ropts, $_;
		$noquilt = 1;
	    } else {
		badusage "unknown long option \`$_'";
	    }
	} else {
	    while (m/^-./s) {
		if (s/^-n/-/) {
		    push @ropts, $&;
		    $dryrun_level=2;
		} elsif (s/^-L/-/) {
		    push @ropts, $&;
		    $dryrun_level=1;
		} elsif (s/^-h/-/) {
		    cmd_help();
		} elsif (s/^-D/-/) {
		    push @ropts, $&;
		    open DEBUG, ">&STDERR" or die $!;
		    autoflush DEBUG 1;
		    $debug++;
		} elsif (s/^-N/-/) {
		    push @ropts, $&;
		    $new_package=1;
		} elsif (s/^-v([^_]+|_)$//s) {
		    push @ropts, $&;
		    $changes_since_version = $1;
		} elsif (m/^-m/) {
		    push @ropts, $&;
		    push @changesopts, $_;
		    $_ = '';
		} elsif (s/^-c(.*=.*)//s) {
		    push @ropts, $&;
		    push @git, '-c', $1;
		} elsif (s/^-d(.*)//s) {
		    push @ropts, $&;
		    $idistro = $1;
		} elsif (s/^-C(.*)//s) {
		    push @ropts, $&;
		    $changesfile = $1;
		} elsif (s/^-k(.*)//s) {
		    $keyid=$1;
		} elsif (s/^-wn//s) {
		    push @ropts, $&;
		    $cleanmode = 'none';
		} elsif (s/^-wg//s) {
		    push @ropts, $&;
		    $cleanmode = 'git';
		} elsif (s/^-wd//s) {
		    push @ropts, $&;
		    $cleanmode = 'dpkg-source';
		} else {
		    badusage "unknown short option \`$_'";
		}
	    }
	}
    }
}

if ($ENV{$fakeeditorenv}) {
    quilt_fixup_editor();
}

delete $ENV{'DGET_UNPACK'};

parseopts();
print STDERR "DRY RUN ONLY\n" if $dryrun_level > 1;
print STDERR "DAMP RUN - WILL MAKE LOCAL (UNSIGNED) CHANGES\n"
    if $dryrun_level == 1;
if (!@ARGV) {
    print STDERR $helpmsg or die $!;
    exit 8;
}
my $cmd = shift @ARGV;
$cmd =~ y/-/_/;
{ no strict qw(refs); &{"cmd_$cmd"}(); }