summaryrefslogtreecommitdiff
path: root/contrib/remote-helpers/git-remote-hg
blob: b983627ce32da4ad48c8972a592d0b5fe2fab317 (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
#!/usr/bin/env python
#
# Copyright (c) 2012 Felipe Contreras
#
 
# Inspired by Rocco Rutte's hg-fast-export
 
# Just copy to your ~/bin, or anywhere in your $PATH.
# Then you can clone with:
# git clone hg::/path/to/mercurial/repo/
#
# For remote repositories a local clone is stored in
# "$GIT_DIR/hg/origin/clone/.hg/".
 
from mercurial import hg, ui, bookmarks, context, encoding, node, error, extensions, discovery, util
 
import re
import sys
import os
import json
import shutil
import subprocess
import urllib
import atexit
import urlparse, hashlib
 
#
# If you are not in hg-git-compat mode and want to disable the tracking of
# named branches:
# git config --global remote-hg.track-branches false
#
# If you don't want to force pushes (and thus risk creating new remote heads):
# git config --global remote-hg.force-push false
#
# If you want the equivalent of hg's clone/pull--insecure option:
# git config --global remote-hg.insecure true
#
# If you want to switch to hg-git compatibility mode:
# git config --global remote-hg.hg-git-compat true
#
# git:
# Sensible defaults for git.
# hg bookmarks are exported as git branches, hg branches are prefixed
# with 'branches/', HEAD is a special case.
#
# hg:
# Emulate hg-git.
# Only hg bookmarks are exported as git branches.
# Commits are modified to preserve hg information and allow bidirectionality.
#
 
NAME_RE = re.compile('^([^<>]+)')
AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
EMAIL_RE = re.compile('^([^<>]+[^ \\\t<>])?\\b(?:[ \\t<>]*?)\\b([^ \\t<>]+@[^ \\t<>]+)')
AUTHOR_HG_RE = re.compile('^(.*?) ?<(.*?)(?:>(.+)?)?$')
RAW_AUTHOR_RE = re.compile('^(\w+) (?:(.+)? )?<(.*)> (\d+) ([+-]\d+)')
 
VERSION = 2
 
def die(msg, *args):
    sys.stderr.write('ERROR: %s\n' % (msg % args))
    sys.exit(1)
 
def warn(msg, *args):
    sys.stderr.write('WARNING: %s\n' % (msg % args))
 
def gitmode(flags):
    return 'l' in flags and '120000' or 'x' in flags and '100755' or '100644'
 
def gittz(tz):
    return '%+03d%02d' % (-tz / 3600, -tz % 3600 / 60)
 
def hgmode(mode):
    m = { '100755': 'x', '120000': 'l' }
    return m.get(mode, '')
 
def hghex(n):
    return node.hex(n)
 
def hgbin(n):
    return node.bin(n)
 
def hgref(ref):
    return ref.replace('___', ' ')
 
def gitref(ref):
    return ref.replace(' ', '___')
 
def check_version(*check):
    if not hg_version:
        return True
    return hg_version >= check
 
def get_config(config):
    cmd = ['git', 'config', '--get', config]
    process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
    output, _ = process.communicate()
    return output
 
def get_config_bool(config, default=False):
    value = get_config(config).rstrip('\n')
    if value == "true":
        return True
    elif value == "false":
        return False
    else:
        return default
 
class Marks:
 
    def __init__(self, path, repo):
        self.path = path
        self.repo = repo
        self.clear()
        self.load()
 
        if self.version < VERSION:
            if self.version == 1:
                self.upgrade_one()
 
            # upgraded?
            if self.version < VERSION:
                self.clear()
                self.version = VERSION
 
    def clear(self):
        self.tips = {}
        self.marks = {}
        self.rev_marks = {}
        self.last_mark = 0
        self.version = 0
 
    def load(self):
        if not os.path.exists(self.path):
            return
 
        tmp = json.load(open(self.path))
 
        self.tips = tmp['tips']
        self.marks = tmp['marks']
        self.last_mark = tmp['last-mark']
        self.version = tmp.get('version', 1)
 
        for rev, mark in self.marks.iteritems():
            self.rev_marks[mark] = rev
 
    def upgrade_one(self):
        def get_id(rev):
            return hghex(self.repo.changelog.node(int(rev)))
        self.tips = dict((name, get_id(rev)) for name, rev in self.tips.iteritems())
        self.marks = dict((get_id(rev), mark) for rev, mark in self.marks.iteritems())
        self.rev_marks = dict((mark, get_id(rev)) for mark, rev in self.rev_marks.iteritems())
        self.version = 2
 
    def dict(self):
        return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark, 'version' : self.version }
 
    def store(self):
        json.dump(self.dict(), open(self.path, 'w'))
 
    def __str__(self):
        return str(self.dict())
 
    def from_rev(self, rev):
        return self.marks[rev]
 
    def to_rev(self, mark):
        return str(self.rev_marks[mark])
 
    def next_mark(self):
        self.last_mark += 1
        return self.last_mark
 
    def get_mark(self, rev):
        self.last_mark += 1
        self.marks[rev] = self.last_mark
        return self.last_mark
 
    def new_mark(self, rev, mark):
        self.marks[rev] = mark
        self.rev_marks[mark] = rev
        self.last_mark = mark
 
    def is_marked(self, rev):
        return rev in self.marks
 
    def get_tip(self, branch):
        return str(self.tips[branch])
 
    def set_tip(self, branch, tip):
        self.tips[branch] = tip
 
class Parser:
 
    def __init__(self, repo):
        self.repo = repo
        self.line = self.get_line()
 
    def get_line(self):
        return sys.stdin.readline().strip()
 
    def __getitem__(self, i):
        return self.line.split()[i]
 
    def check(self, word):
        return self.line.startswith(word)
 
    def each_block(self, separator):
        while self.line != separator:
            yield self.line
            self.line = self.get_line()
 
    def __iter__(self):
        return self.each_block('')
 
    def next(self):
        self.line = self.get_line()
        if self.line == 'done':
            self.line = None
 
    def get_mark(self):
        i = self.line.index(':') + 1
        return int(self.line[i:])
 
    def get_data(self):
        if not self.check('data'):
            return None
        i = self.line.index(' ') + 1
        size = int(self.line[i:])
        return sys.stdin.read(size)
 
    def get_author(self):
        global bad_mail
 
        ex = None
        m = RAW_AUTHOR_RE.match(self.line)
        if not m:
            return None
        _, name, email, date, tz = m.groups()
        if name and 'ext:' in name:
            m = re.match('^(.+?) ext:\((.+)\)$', name)
            if m:
                name = m.group(1)
                ex = urllib.unquote(m.group(2))
 
        if email != bad_mail:
            if name:
                user = '%s <%s>' % (name, email)
            else:
                user = '<%s>' % (email)
        else:
            user = name
 
        if ex:
            user += ex
 
        tz = int(tz)
        tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
        return (user, int(date), -tz)
 
def fix_file_path(path):
    if not os.path.isabs(path):
        return path
    return os.path.relpath(path, '/')
 
def export_files(files):
    global marks, filenodes
 
    final = []
    for f in files:
        fid = node.hex(f.filenode())
 
        if fid in filenodes:
            mark = filenodes[fid]
        else:
            mark = marks.next_mark()
            filenodes[fid] = mark
            d = f.data()
 
            print "blob"
            print "mark :%u" % mark
            print "data %d" % len(d)
            print d
 
        path = fix_file_path(f.path())
        final.append((gitmode(f.flags()), mark, path))
 
    return final
 
def get_filechanges(repo, ctx, parent):
    modified = set()
    added = set()
    removed = set()
 
    # load earliest manifest first for caching reasons
    prev = parent.manifest().copy()
    cur = ctx.manifest()
 
    for fn in cur:
        if fn in prev:
            if (cur.flags(fn) != prev.flags(fn) or cur[fn] != prev[fn]):
                modified.add(fn)
            del prev[fn]
        else:
            added.add(fn)
    removed |= set(prev.keys())
 
    return added | modified, removed
 
def fixup_user_git(user):
    name = mail = None
    user = user.replace('"', '')
    m = AUTHOR_RE.match(user)
    if m:
        name = m.group(1)
        mail = m.group(2).strip()
    else:
        m = EMAIL_RE.match(user)
        if m:
            name = m.group(1)
            mail = m.group(2)
        else:
            m = NAME_RE.match(user)
            if m:
                name = m.group(1).strip()
    return (name, mail)
 
def fixup_user_hg(user):
    def sanitize(name):
        # stole this from hg-git
        return re.sub('[<>\n]', '?', name.lstrip('< ').rstrip('> '))
 
    m = AUTHOR_HG_RE.match(user)
    if m:
        name = sanitize(m.group(1))
        mail = sanitize(m.group(2))
        ex = m.group(3)
        if ex:
            name += ' ext:(' + urllib.quote(ex) + ')'
    else:
        name = sanitize(user)
        if '@' in user:
            mail = name
        else:
            mail = None
 
    return (name, mail)
 
def fixup_user(user):
    global mode, bad_mail
 
    if mode == 'git':
        name, mail = fixup_user_git(user)
    else:
        name, mail = fixup_user_hg(user)
 
    if not name:
        name = bad_name
    if not mail:
        mail = bad_mail
 
    return '%s <%s>' % (name, mail)
 
def updatebookmarks(repo, peer):
    remotemarks = peer.listkeys('bookmarks')
    localmarks = repo._bookmarks
 
    if not remotemarks:
        return
 
    for k, v in remotemarks.iteritems():
        localmarks[k] = hgbin(v)
 
    if hasattr(localmarks, 'write'):
        localmarks.write()
    else:
        bookmarks.write(repo)
 
def get_repo(url, alias):
    global dirname, peer
 
    myui = ui.ui()
    myui.setconfig('ui', 'interactive', 'off')
    myui.fout = sys.stderr
 
    if get_config_bool('remote-hg.insecure'):
        myui.setconfig('web', 'cacerts', '')
 
    extensions.loadall(myui)
 
    if hg.islocal(url) and not os.environ.get('GIT_REMOTE_HG_TEST_REMOTE'):
        repo = hg.repository(myui, url)
        if not os.path.exists(dirname):
            os.makedirs(dirname)
    else:
        shared_path = os.path.join(gitdir, 'hg')
        if not os.path.exists(shared_path):
            try:
                hg.clone(myui, {}, url, shared_path, update=False, pull=True)
            except:
                die('Repository error')
 
        if not os.path.exists(dirname):
            os.makedirs(dirname)
 
        local_path = os.path.join(dirname, 'clone')
        if not os.path.exists(local_path):
            hg.share(myui, shared_path, local_path, update=False)
 
        repo = hg.repository(myui, local_path)
        try:
            peer = hg.peer(myui, {}, url)
        except:
            die('Repository error')
        repo.pull(peer, heads=None, force=True)
 
        updatebookmarks(repo, peer)
 
    return repo
 
def rev_to_mark(rev):
    global marks
    return marks.from_rev(rev.hex())
 
def mark_to_rev(mark):
    global marks
    return marks.to_rev(mark)
 
def export_ref(repo, name, kind, head):
    global prefix, marks, mode
 
    ename = '%s/%s' % (kind, name)
    try:
        tip = marks.get_tip(ename)
        tip = repo[tip].rev()
    except:
        tip = 0
 
    revs = xrange(tip, head.rev() + 1)
    total = len(revs)
 
    for rev in revs:
 
        c = repo[rev]
        node = c.node()
 
        if marks.is_marked(c.hex()):
            continue
 
        (manifest, user, (time, tz), files, desc, extra) = repo.changelog.read(node)
        rev_branch = extra['branch']
 
        author = "%s %d %s" % (fixup_user(user), time, gittz(tz))
        if 'committer' in extra:
            user, time, tz = extra['committer'].rsplit(' ', 2)
            committer = "%s %s %s" % (user, time, gittz(int(tz)))
        else:
            committer = author
 
        parents = [repo[p] for p in repo.changelog.parentrevs(rev) if p >= 0]
 
        if len(parents) == 0:
            modified = c.manifest().keys()
            removed = []
        else:
            modified, removed = get_filechanges(repo, c, parents[0])
 
        desc += '\n'
 
        if mode == 'hg':
            extra_msg = ''
 
            if rev_branch != 'default':
                extra_msg += 'branch : %s\n' % rev_branch
 
            renames = []
            for f in c.files():
                if f not in c.manifest():
                    continue
                rename = c.filectx(f).renamed()
                if rename:
                    renames.append((rename[0], f))
 
            for e in renames:
                extra_msg += "rename : %s => %s\n" % e
 
            for key, value in extra.iteritems():
                if key in ('author', 'committer', 'encoding', 'message', 'branch', 'hg-git'):
                    continue
                else:
                    extra_msg += "extra : %s : %s\n" % (key, urllib.quote(value))
 
            if extra_msg:
                desc += '\n--HG--\n' + extra_msg
 
        if len(parents) == 0 and rev:
            print 'reset %s/%s' % (prefix, ename)
 
        modified_final = export_files(c.filectx(f) for f in modified)
 
        print "commit %s/%s" % (prefix, ename)
        print "mark :%d" % (marks.get_mark(c.hex()))
        print "author %s" % (author)
        print "committer %s" % (committer)
        print "data %d" % (len(desc))
        print desc
 
        if len(parents) > 0:
            print "from :%s" % (rev_to_mark(parents[0]))
            if len(parents) > 1:
                print "merge :%s" % (rev_to_mark(parents[1]))
 
        for f in removed:
            print "D %s" % (fix_file_path(f))
        for f in modified_final:
            print "M %s :%u %s" % f
        print
 
        progress = (rev - tip)
        if (progress % 100 == 0):
            print "progress revision %d '%s' (%d/%d)" % (rev, name, progress, total)
 
    # make sure the ref is updated
    print "reset %s/%s" % (prefix, ename)
    print "from :%u" % rev_to_mark(head)
    print
 
    marks.set_tip(ename, head.hex())
 
def export_tag(repo, tag):
    export_ref(repo, tag, 'tags', repo[hgref(tag)])
 
def export_bookmark(repo, bmark):
    head = bmarks[hgref(bmark)]
    export_ref(repo, bmark, 'bookmarks', head)
 
def export_branch(repo, branch):
    tip = get_branch_tip(repo, branch)
    head = repo[tip]
    export_ref(repo, branch, 'branches', head)
 
def export_head(repo):
    global g_head
    export_ref(repo, g_head[0], 'bookmarks', g_head[1])
 
def do_capabilities(parser):
    global prefix, dirname
 
    print "import"
    print "export"
    print "refspec refs/heads/branches/*:%s/branches/*" % prefix
    print "refspec refs/heads/*:%s/bookmarks/*" % prefix
    print "refspec refs/tags/*:%s/tags/*" % prefix
 
    path = os.path.join(dirname, 'marks-git')
 
    if os.path.exists(path):
        print "*import-marks %s" % path
    print "*export-marks %s" % path
 
    print
 
def branch_tip(branch):
    return branches[branch][-1]
 
def get_branch_tip(repo, branch):
    global branches
 
    heads = branches.get(hgref(branch), None)
    if not heads:
        return None
 
    # verify there's only one head
    if (len(heads) > 1):
        warn("Branch '%s' has more than one head, consider merging" % branch)
        return branch_tip(hgref(branch))
 
    return heads[0]
 
def list_head(repo, cur):
    global g_head, bmarks, fake_bmark
 
    if 'default' not in branches:
        # empty repo
        return
 
    node = repo[branch_tip('default')]
    head = 'master' if not 'master' in bmarks else 'default'
    fake_bmark = head
    bmarks[head] = node
 
    head = gitref(head)
    print "@refs/heads/%s HEAD" % head
    g_head = (head, node)
 
def do_list(parser):
    global branches, bmarks, track_branches
 
    repo = parser.repo
    for bmark, node in bookmarks.listbookmarks(repo).iteritems():
        bmarks[bmark] = repo[node]
 
    cur = repo.dirstate.branch()
    orig = peer if peer else repo
 
    for branch, heads in orig.branchmap().iteritems():
        # only open heads
        heads = [h for h in heads if 'close' not in repo.changelog.read(h)[5]]
        if heads:
            branches[branch] = heads
 
    list_head(repo, cur)
 
    if track_branches:
        for branch in branches:
            print "? refs/heads/branches/%s" % gitref(branch)
 
    for bmark in bmarks:
        print "? refs/heads/%s" % gitref(bmark)
 
    for tag, node in repo.tagslist():
        if tag == 'tip':
            continue
        print "? refs/tags/%s" % gitref(tag)
 
    print
 
def do_import(parser):
    repo = parser.repo
 
    path = os.path.join(dirname, 'marks-git')
 
    print "feature done"
    if os.path.exists(path):
        print "feature import-marks=%s" % path
    print "feature export-marks=%s" % path
    print "feature force"
    sys.stdout.flush()
 
    tmp = encoding.encoding
    encoding.encoding = 'utf-8'
 
    # lets get all the import lines
    while parser.check('import'):
        ref = parser[1]
 
        if (ref == 'HEAD'):
            export_head(repo)
        elif ref.startswith('refs/heads/branches/'):
            branch = ref[len('refs/heads/branches/'):]
            export_branch(repo, branch)
        elif ref.startswith('refs/heads/'):
            bmark = ref[len('refs/heads/'):]
            export_bookmark(repo, bmark)
        elif ref.startswith('refs/tags/'):
            tag = ref[len('refs/tags/'):]
            export_tag(repo, tag)
 
        parser.next()
 
    encoding.encoding = tmp
 
    print 'done'
 
def parse_blob(parser):
    global blob_marks
 
    parser.next()
    mark = parser.get_mark()
    parser.next()
    data = parser.get_data()
    blob_marks[mark] = data
    parser.next()
 
def get_merge_files(repo, p1, p2, files):
    for e in repo[p1].files():
        if e not in files:
            if e not in repo[p1].manifest():
                continue
            f = { 'ctx' : repo[p1][e] }
            files[e] = f
 
def parse_commit(parser):
    global marks, blob_marks, parsed_refs
    global mode
 
    from_mark = merge_mark = None
 
    ref = parser[1]
    parser.next()
 
    commit_mark = parser.get_mark()
    parser.next()
    author = parser.get_author()
    parser.next()
    committer = parser.get_author()
    parser.next()
    data = parser.get_data()
    parser.next()
    if parser.check('from'):
        from_mark = parser.get_mark()
        parser.next()
    if parser.check('merge'):
        merge_mark = parser.get_mark()
        parser.next()
        if parser.check('merge'):
            die('octopus merges are not supported yet')
 
    # fast-export adds an extra newline
    if data[-1] == '\n':
        data = data[:-1]
 
    files = {}
 
    for line in parser:
        if parser.check('M'):
            t, m, mark_ref, path = line.split(' ', 3)
            mark = int(mark_ref[1:])
            f = { 'mode' : hgmode(m), 'data' : blob_marks[mark] }
        elif parser.check('D'):
            t, path = line.split(' ', 1)
            f = { 'deleted' : True }
        else:
            die('Unknown file command: %s' % line)
        files[path] = f
 
    def getfilectx(repo, memctx, f):
        of = files[f]
        if 'deleted' in of:
            raise IOError
        if 'ctx' in of:
            return of['ctx']
        is_exec = of['mode'] == 'x'
        is_link = of['mode'] == 'l'
        rename = of.get('rename', None)
        return context.memfilectx(f, of['data'],
                is_link, is_exec, rename)
 
    repo = parser.repo
 
    user, date, tz = author
    extra = {}
 
    if committer != author:
        extra['committer'] = "%s %u %u" % committer
 
    if from_mark:
        p1 = mark_to_rev(from_mark)
    else:
        p1 = '0' * 40
 
    if merge_mark:
        p2 = mark_to_rev(merge_mark)
    else:
        p2 = '0' * 40
 
    #
    # If files changed from any of the parents, hg wants to know, but in git if
    # nothing changed from the first parent, nothing changed.
    #
    if merge_mark:
        get_merge_files(repo, p1, p2, files)
 
    # Check if the ref is supposed to be a named branch
    if ref.startswith('refs/heads/branches/'):
        branch = ref[len('refs/heads/branches/'):]
        extra['branch'] = hgref(branch)
 
    if mode == 'hg':
        i = data.find('\n--HG--\n')
        if i >= 0:
            tmp = data[i + len('\n--HG--\n'):].strip()
            for k, v in [e.split(' : ', 1) for e in tmp.split('\n')]:
                if k == 'rename':
                    old, new = v.split(' => ', 1)
                    files[new]['rename'] = old
                elif k == 'branch':
                    extra[k] = v
                elif k == 'extra':
                    ek, ev = v.split(' : ', 1)
                    extra[ek] = urllib.unquote(ev)
            data = data[:i]
 
    ctx = context.memctx(repo, (p1, p2), data,
            files.keys(), getfilectx,
            user, (date, tz), extra)
 
    tmp = encoding.encoding
    encoding.encoding = 'utf-8'
 
    node = hghex(repo.commitctx(ctx))
 
    encoding.encoding = tmp
 
    parsed_refs[ref] = node
    marks.new_mark(node, commit_mark)
 
def parse_reset(parser):
    global parsed_refs
 
    ref = parser[1]
    parser.next()
    # ugh
    if parser.check('commit'):
        parse_commit(parser)
        return
    if not parser.check('from'):
        return
    from_mark = parser.get_mark()
    parser.next()
 
    rev = mark_to_rev(from_mark)
    parsed_refs[ref] = rev
 
def parse_tag(parser):
    name = parser[1]
    parser.next()
    from_mark = parser.get_mark()
    parser.next()
    tagger = parser.get_author()
    parser.next()
    data = parser.get_data()
    parser.next()
 
    parsed_tags[name] = (tagger, data)
 
def write_tag(repo, tag, node, msg, author):
    branch = repo[node].branch()
    tip = branch_tip(branch)
    tip = repo[tip]
 
    def getfilectx(repo, memctx, f):
        try:
            fctx = tip.filectx(f)
            data = fctx.data()
        except error.ManifestLookupError:
            data = ""
        content = data + "%s %s\n" % (node, tag)
        return context.memfilectx(f, content, False, False, None)
 
    p1 = tip.hex()
    p2 = '0' * 40
    if author:
        user, date, tz = author
        date_tz = (date, tz)
    else:
        cmd = ['git', 'var', 'GIT_COMMITTER_IDENT']
        process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
        output, _ = process.communicate()
        m = re.match('^.* <.*>', output)
        if m:
            user = m.group(0)
        else:
            user = repo.ui.username()
        date_tz = None
 
    ctx = context.memctx(repo, (p1, p2), msg,
            ['.hgtags'], getfilectx,
            user, date_tz, {'branch' : branch})
 
    tmp = encoding.encoding
    encoding.encoding = 'utf-8'
 
    tagnode = repo.commitctx(ctx)
 
    encoding.encoding = tmp
 
    return (tagnode, branch)
 
def checkheads_bmark(repo, ref, ctx):
    if force_push:
        return True
 
    bmark = ref[len('refs/heads/'):]
    if not bmark in bmarks:
        # new bmark
        return True
 
    ctx_old = bmarks[bmark]
    ctx_new = ctx
    if not repo.changelog.descendant(ctx_old.rev(), ctx_new.rev()):
        print "error %s non-fast forward" % ref
        return False
 
    return True
 
def checkheads(repo, remote, p_revs):
 
    remotemap = remote.branchmap()
    if not remotemap:
        # empty repo
        return True
 
    new = {}
    ret = True
 
    for node, ref in p_revs.iteritems():
        ctx = repo[node]
        branch = ctx.branch()
        if not branch in remotemap:
            # new branch
            continue
        if not ref.startswith('refs/heads/branches'):
            if ref.startswith('refs/heads/'):
                if not checkheads_bmark(repo, ref, ctx):
                    ret = False
 
            # only check branches
            continue
        new.setdefault(branch, []).append(ctx.rev())
 
    for branch, heads in new.iteritems():
        old = [repo.changelog.rev(x) for x in remotemap[branch]]
        for rev in heads:
            if check_version(2, 3):
                ancestors = repo.changelog.ancestors([rev], stoprev=min(old))
            else:
                ancestors = repo.changelog.ancestors(rev)
            found = False
 
            for x in old:
                if x in ancestors:
                    found = True
                    break
 
            if found:
                continue
 
            node = repo.changelog.node(rev)
            print "error %s non-fast forward" % p_revs[node]
            ret = False
 
    return ret
 
def push_unsafe(repo, remote, parsed_refs, p_revs):
 
    force = force_push
 
    fci = discovery.findcommonincoming
    commoninc = fci(repo, remote, force=force)
    common, _, remoteheads = commoninc
 
    if not force and not checkheads(repo, remote, p_revs):
        return None
 
    cg = repo.getbundle('push', heads=list(p_revs), common=common)
 
    unbundle = remote.capable('unbundle')
    if unbundle:
        if force:
            remoteheads = ['force']
        return remote.unbundle(cg, remoteheads, 'push')
    else:
        return remote.addchangegroup(cg, 'push', repo.url())
 
def push(repo, remote, parsed_refs, p_revs):
    if hasattr(remote, 'canpush') and not remote.canpush():
        print "error cannot push"
 
    if not p_revs:
        # nothing to push
        return
 
    lock = None
    unbundle = remote.capable('unbundle')
    if not unbundle:
        lock = remote.lock()
    try:
        ret = push_unsafe(repo, remote, parsed_refs, p_revs)
    finally:
        if lock is not None:
            lock.release()
 
    return ret
 
def check_tip(ref, kind, name, heads):
    try:
        ename = '%s/%s' % (kind, name)
        tip = marks.get_tip(ename)
    except KeyError:
        return True
    else:
        return tip in heads
 
def do_export(parser):
    global parsed_refs, bmarks, peer
 
    p_bmarks = []
    p_revs = {}
 
    parser.next()
 
    for line in parser.each_block('done'):
        if parser.check('blob'):
            parse_blob(parser)
        elif parser.check('commit'):
            parse_commit(parser)
        elif parser.check('reset'):
            parse_reset(parser)
        elif parser.check('tag'):
            parse_tag(parser)
        elif parser.check('feature'):
            pass
        else:
            die('unhandled export command: %s' % line)
 
    need_fetch = False
 
    for ref, node in parsed_refs.iteritems():
        bnode = hgbin(node)
        if ref.startswith('refs/heads/branches'):
            branch = ref[len('refs/heads/branches/'):]
            if branch in branches and bnode in branches[branch]:
                # up to date
                continue
 
            if peer:
                remotemap = peer.branchmap()
                if remotemap and branch in remotemap:
                    heads = [hghex(e) for e in remotemap[branch]]
                    if not check_tip(ref, 'branches', branch, heads):
                        print "error %s fetch first" % ref
                        need_fetch = True
                        continue
 
            p_revs[bnode] = ref
            print "ok %s" % ref
        elif ref.startswith('refs/heads/'):
            bmark = ref[len('refs/heads/'):]
            new = node
            old = bmarks[bmark].hex() if bmark in bmarks else ''
 
            if old == new:
                continue
 
            print "ok %s" % ref
            if bmark != fake_bmark and \
                    not (bmark == 'master' and bmark not in parser.repo._bookmarks):
                p_bmarks.append((ref, bmark, old, new))
 
            if peer:
                remote_old = peer.listkeys('bookmarks').get(bmark)
                if remote_old:
                    if not check_tip(ref, 'bookmarks', bmark, remote_old):
                        print "error %s fetch first" % ref
                        need_fetch = True
                        continue
 
            p_revs[bnode] = ref
        elif ref.startswith('refs/tags/'):
            tag = ref[len('refs/tags/'):]
            tag = hgref(tag)
            author, msg = parsed_tags.get(tag, (None, None))
            if mode == 'git':
                if not msg:
                    msg = 'Added tag %s for changeset %s' % (tag, node[:12]);
                tagnode, branch = write_tag(parser.repo, tag, node, msg, author)
                p_revs[tagnode] = 'refs/heads/branches/' + gitref(branch)
            else:
                fp = parser.repo.opener('localtags', 'a')
                fp.write('%s %s\n' % (node, tag))
                fp.close()
            p_revs[bnode] = ref
            print "ok %s" % ref
        else:
            # transport-helper/fast-export bugs
            continue
 
    if need_fetch:
        print
        return
 
    if dry_run:
        if peer and not force_push:
            checkheads(parser.repo, peer, p_revs)
        print
        return
 
    if peer:
        if not push(parser.repo, peer, parsed_refs, p_revs):
            # do not update bookmarks
            print
            return
 
        # update remote bookmarks
        remote_bmarks = peer.listkeys('bookmarks')
        for ref, bmark, old, new in p_bmarks:
            if force_push:
                old = remote_bmarks.get(bmark, '')
            if not peer.pushkey('bookmarks', bmark, old, new):
                print "error %s" % ref
    else:
        # update local bookmarks
        for ref, bmark, old, new in p_bmarks:
            if not bookmarks.pushbookmark(parser.repo, bmark, old, new):
                print "error %s" % ref
 
    print
 
def fix_path(alias, repo, orig_url):
    url = urlparse.urlparse(orig_url, 'file')
    if url.scheme != 'file' or os.path.isabs(url.path):
        return
    abs_url = urlparse.urljoin("%s/" % os.getcwd(), orig_url)
    cmd = ['git', 'config', 'remote.%s.url' % alias, "hg::%s" % abs_url]
    subprocess.call(cmd)
 
def main(args):
    global prefix, gitdir, dirname, branches, bmarks
    global marks, blob_marks, parsed_refs
    global peer, mode, bad_mail, bad_name
    global track_branches, force_push, is_tmp
    global parsed_tags
    global filenodes
    global fake_bmark, hg_version
 
    alias = args[1]
    url = args[2]
    peer = None
 
    hg_git_compat = get_config_bool('remote-hg.hg-git-compat')
    track_branches = get_config_bool('remote-hg.track-branches', True)
    force_push = get_config_bool('remote-hg.force-push')
 
    if hg_git_compat:
        mode = 'hg'
        bad_mail = 'none@none'
        bad_name = ''
    else:
        mode = 'git'
        bad_mail = 'unknown'
        bad_name = 'Unknown'
 
    if alias[4:] == url:
        is_tmp = True
        alias = hashlib.sha1(alias).hexdigest()
    else:
        is_tmp = False
 
    gitdir = os.environ['GIT_DIR']
    dirname = os.path.join(gitdir, 'hg', alias)
    branches = {}
    bmarks = {}
    blob_marks = {}
    parsed_refs = {}
    marks = None
    parsed_tags = {}
    filenodes = {}
    fake_bmark = None
    try:
        hg_version = tuple(int(e) for e in util.version().split('.'))
    except:
        hg_version = None
 
    repo = get_repo(url, alias)
    prefix = 'refs/hg/%s' % alias
 
    if not is_tmp:
        fix_path(alias, peer or repo, url)
 
    marks_path = os.path.join(dirname, 'marks-hg')
    marks = Marks(marks_path, repo)
 
    if sys.platform == 'win32':
        import msvcrt
        msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
 
    parser = Parser(repo)
    for line in parser:
        if parser.check('capabilities'):
            do_capabilities(parser)
        elif parser.check('list'):
            do_list(parser)
        elif parser.check('import'):
            do_import(parser)
        elif parser.check('export'):
            do_export(parser)
        else:
            die('unhandled command: %s' % line)
        sys.stdout.flush()
 
def bye():
    if not marks:
        return
    if not is_tmp:
        marks.store()
    else:
        shutil.rmtree(dirname)
 
atexit.register(bye)
sys.exit(main(sys.argv))