Andrew's git - gitweb.git/blob - contrib/remote-helpers/git-remote-hg

   1#!/usr/bin/env python
   2#
   3# Copyright (c) 2012 Felipe Contreras
   4#
   5
   6# Inspired by Rocco Rutte's hg-fast-export
   7
   8# Just copy to your ~/bin, or anywhere in your $PATH.
   9# Then you can clone with:
  10# git clone hg::/path/to/mercurial/repo/
  11
  12from mercurial import hg, ui, bookmarks, context, util, encoding, node, error
  13
  14import re
  15import sys
  16import os
  17import json
  18import shutil
  19import subprocess
  20import urllib
  21import atexit
  22
  23#
  24# If you want to switch to hg-git compatibility mode:
  25# git config --global remote-hg.hg-git-compat true
  26#
  27# If you are not in hg-git-compat mode and want to disable the tracking of
  28# named branches:
  29# git config --global remote-hg.track-branches false
  30#
  31# If you don't want to force pushes (and thus risk creating new remote heads):
  32# git config --global remote-hg.force-push false
  33#
  34# If you want the equivalent of hg's clone/pull--insecure option:
  35# git config remote-hg.insecure true
  36#
  37# git:
  38# Sensible defaults for git.
  39# hg bookmarks are exported as git branches, hg branches are prefixed
  40# with 'branches/', HEAD is a special case.
  41#
  42# hg:
  43# Emulate hg-git.
  44# Only hg bookmarks are exported as git branches.
  45# Commits are modified to preserve hg information and allow bidirectionality.
  46#
  47
  48NAME_RE = re.compile('^([^<>]+)')
  49AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
  50AUTHOR_HG_RE = re.compile('^(.*?) ?<(.*?)(?:>(.+)?)?$')
  51RAW_AUTHOR_RE = re.compile('^(\w+) (?:(.+)? )?<(.*)> (\d+) ([+-]\d+)')
  52
  53def die(msg, *args):
  54    sys.stderr.write('ERROR: %s\n' % (msg % args))
  55    sys.exit(1)
  56
  57def warn(msg, *args):
  58    sys.stderr.write('WARNING: %s\n' % (msg % args))
  59
  60def gitmode(flags):
  61    return 'l' in flags and '120000' or 'x' in flags and '100755' or '100644'
  62
  63def gittz(tz):
  64    return '%+03d%02d' % (-tz / 3600, -tz % 3600 / 60)
  65
  66def hgmode(mode):
  67    m = { '100755': 'x', '120000': 'l' }
  68    return m.get(mode, '')
  69
  70def hghex(node):
  71    return hg.node.hex(node)
  72
  73def get_config(config):
  74    cmd = ['git', 'config', '--get', config]
  75    process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
  76    output, _ = process.communicate()
  77    return output
  78
  79class Marks:
  80
  81    def __init__(self, path):
  82        self.path = path
  83        self.tips = {}
  84        self.marks = {}
  85        self.rev_marks = {}
  86        self.last_mark = 0
  87
  88        self.load()
  89
  90    def load(self):
  91        if not os.path.exists(self.path):
  92            return
  93
  94        tmp = json.load(open(self.path))
  95
  96        self.tips = tmp['tips']
  97        self.marks = tmp['marks']
  98        self.last_mark = tmp['last-mark']
  99
 100        for rev, mark in self.marks.iteritems():
 101            self.rev_marks[mark] = int(rev)
 102
 103    def dict(self):
 104        return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark }
 105
 106    def store(self):
 107        json.dump(self.dict(), open(self.path, 'w'))
 108
 109    def __str__(self):
 110        return str(self.dict())
 111
 112    def from_rev(self, rev):
 113        return self.marks[str(rev)]
 114
 115    def to_rev(self, mark):
 116        return self.rev_marks[mark]
 117
 118    def get_mark(self, rev):
 119        self.last_mark += 1
 120        self.marks[str(rev)] = self.last_mark
 121        return self.last_mark
 122
 123    def new_mark(self, rev, mark):
 124        self.marks[str(rev)] = mark
 125        self.rev_marks[mark] = rev
 126        self.last_mark = mark
 127
 128    def is_marked(self, rev):
 129        return self.marks.has_key(str(rev))
 130
 131    def get_tip(self, branch):
 132        return self.tips.get(branch, 0)
 133
 134    def set_tip(self, branch, tip):
 135        self.tips[branch] = tip
 136
 137class Parser:
 138
 139    def __init__(self, repo):
 140        self.repo = repo
 141        self.line = self.get_line()
 142
 143    def get_line(self):
 144        return sys.stdin.readline().strip()
 145
 146    def __getitem__(self, i):
 147        return self.line.split()[i]
 148
 149    def check(self, word):
 150        return self.line.startswith(word)
 151
 152    def each_block(self, separator):
 153        while self.line != separator:
 154            yield self.line
 155            self.line = self.get_line()
 156
 157    def __iter__(self):
 158        return self.each_block('')
 159
 160    def next(self):
 161        self.line = self.get_line()
 162        if self.line == 'done':
 163            self.line = None
 164
 165    def get_mark(self):
 166        i = self.line.index(':') + 1
 167        return int(self.line[i:])
 168
 169    def get_data(self):
 170        if not self.check('data'):
 171            return None
 172        i = self.line.index(' ') + 1
 173        size = int(self.line[i:])
 174        return sys.stdin.read(size)
 175
 176    def get_author(self):
 177        global bad_mail
 178
 179        ex = None
 180        m = RAW_AUTHOR_RE.match(self.line)
 181        if not m:
 182            return None
 183        _, name, email, date, tz = m.groups()
 184        if name and 'ext:' in name:
 185            m = re.match('^(.+?) ext:\((.+)\)$', name)
 186            if m:
 187                name = m.group(1)
 188                ex = urllib.unquote(m.group(2))
 189
 190        if email != bad_mail:
 191            if name:
 192                user = '%s <%s>' % (name, email)
 193            else:
 194                user = '<%s>' % (email)
 195        else:
 196            user = name
 197
 198        if ex:
 199            user += ex
 200
 201        tz = int(tz)
 202        tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
 203        return (user, int(date), -tz)
 204
 205def export_file(fc):
 206    d = fc.data()
 207    print "M %s inline %s" % (gitmode(fc.flags()), fc.path())
 208    print "data %d" % len(d)
 209    print d
 210
 211def get_filechanges(repo, ctx, parent):
 212    modified = set()
 213    added = set()
 214    removed = set()
 215
 216    cur = ctx.manifest()
 217    prev = repo[parent].manifest().copy()
 218
 219    for fn in cur:
 220        if fn in prev:
 221            if (cur.flags(fn) != prev.flags(fn) or cur[fn] != prev[fn]):
 222                modified.add(fn)
 223            del prev[fn]
 224        else:
 225            added.add(fn)
 226    removed |= set(prev.keys())
 227
 228    return added | modified, removed
 229
 230def fixup_user_git(user):
 231    name = mail = None
 232    user = user.replace('"', '')
 233    m = AUTHOR_RE.match(user)
 234    if m:
 235        name = m.group(1)
 236        mail = m.group(2).strip()
 237    else:
 238        m = NAME_RE.match(user)
 239        if m:
 240            name = m.group(1).strip()
 241    return (name, mail)
 242
 243def fixup_user_hg(user):
 244    def sanitize(name):
 245        # stole this from hg-git
 246        return re.sub('[<>\n]', '?', name.lstrip('< ').rstrip('> '))
 247
 248    m = AUTHOR_HG_RE.match(user)
 249    if m:
 250        name = sanitize(m.group(1))
 251        mail = sanitize(m.group(2))
 252        ex = m.group(3)
 253        if ex:
 254            name += ' ext:(' + urllib.quote(ex) + ')'
 255    else:
 256        name = sanitize(user)
 257        if '@' in user:
 258            mail = name
 259        else:
 260            mail = None
 261
 262    return (name, mail)
 263
 264def fixup_user(user):
 265    global mode, bad_mail
 266
 267    if mode == 'git':
 268        name, mail = fixup_user_git(user)
 269    else:
 270        name, mail = fixup_user_hg(user)
 271
 272    if not name:
 273        name = bad_name
 274    if not mail:
 275        mail = bad_mail
 276
 277    return '%s <%s>' % (name, mail)
 278
 279def get_repo(url, alias):
 280    global dirname, peer
 281
 282    myui = ui.ui()
 283    myui.setconfig('ui', 'interactive', 'off')
 284    myui.fout = sys.stderr
 285
 286    try:
 287        if get_config('remote-hg.insecure') == 'true\n':
 288            myui.setconfig('web', 'cacerts', '')
 289    except subprocess.CalledProcessError:
 290        pass
 291
 292    if hg.islocal(url):
 293        repo = hg.repository(myui, url)
 294    else:
 295        local_path = os.path.join(dirname, 'clone')
 296        if not os.path.exists(local_path):
 297            try:
 298                peer, dstpeer = hg.clone(myui, {}, url, local_path, update=True, pull=True)
 299            except:
 300                die('Repository error')
 301            repo = dstpeer.local()
 302        else:
 303            repo = hg.repository(myui, local_path)
 304            try:
 305                peer = hg.peer(myui, {}, url)
 306            except:
 307                die('Repository error')
 308            repo.pull(peer, heads=None, force=True)
 309
 310    return repo
 311
 312def rev_to_mark(rev):
 313    global marks
 314    return marks.from_rev(rev)
 315
 316def mark_to_rev(mark):
 317    global marks
 318    return marks.to_rev(mark)
 319
 320def export_ref(repo, name, kind, head):
 321    global prefix, marks, mode
 322
 323    ename = '%s/%s' % (kind, name)
 324    tip = marks.get_tip(ename)
 325
 326    # mercurial takes too much time checking this
 327    if tip and tip == head.rev():
 328        # nothing to do
 329        return
 330    revs = xrange(tip, head.rev() + 1)
 331    count = 0
 332
 333    revs = [rev for rev in revs if not marks.is_marked(rev)]
 334
 335    for rev in revs:
 336
 337        c = repo[rev]
 338        (manifest, user, (time, tz), files, desc, extra) = repo.changelog.read(c.node())
 339        rev_branch = extra['branch']
 340
 341        author = "%s %d %s" % (fixup_user(user), time, gittz(tz))
 342        if 'committer' in extra:
 343            user, time, tz = extra['committer'].rsplit(' ', 2)
 344            committer = "%s %s %s" % (user, time, gittz(int(tz)))
 345        else:
 346            committer = author
 347
 348        parents = [p for p in repo.changelog.parentrevs(rev) if p >= 0]
 349
 350        if len(parents) == 0:
 351            modified = c.manifest().keys()
 352            removed = []
 353        else:
 354            modified, removed = get_filechanges(repo, c, parents[0])
 355
 356        if mode == 'hg':
 357            extra_msg = ''
 358
 359            if rev_branch != 'default':
 360                extra_msg += 'branch : %s\n' % rev_branch
 361
 362            renames = []
 363            for f in c.files():
 364                if f not in c.manifest():
 365                    continue
 366                rename = c.filectx(f).renamed()
 367                if rename:
 368                    renames.append((rename[0], f))
 369
 370            for e in renames:
 371                extra_msg += "rename : %s => %s\n" % e
 372
 373            for key, value in extra.iteritems():
 374                if key in ('author', 'committer', 'encoding', 'message', 'branch', 'hg-git'):
 375                    continue
 376                else:
 377                    extra_msg += "extra : %s : %s\n" % (key, urllib.quote(value))
 378
 379            desc += '\n'
 380            if extra_msg:
 381                desc += '\n--HG--\n' + extra_msg
 382
 383        if len(parents) == 0 and rev:
 384            print 'reset %s/%s' % (prefix, ename)
 385
 386        print "commit %s/%s" % (prefix, ename)
 387        print "mark :%d" % (marks.get_mark(rev))
 388        print "author %s" % (author)
 389        print "committer %s" % (committer)
 390        print "data %d" % (len(desc))
 391        print desc
 392
 393        if len(parents) > 0:
 394            print "from :%s" % (rev_to_mark(parents[0]))
 395            if len(parents) > 1:
 396                print "merge :%s" % (rev_to_mark(parents[1]))
 397
 398        for f in modified:
 399            export_file(c.filectx(f))
 400        for f in removed:
 401            print "D %s" % (f)
 402        print
 403
 404        count += 1
 405        if (count % 100 == 0):
 406            print "progress revision %d '%s' (%d/%d)" % (rev, name, count, len(revs))
 407            print "#############################################################"
 408
 409    # make sure the ref is updated
 410    print "reset %s/%s" % (prefix, ename)
 411    print "from :%u" % rev_to_mark(rev)
 412    print
 413
 414    marks.set_tip(ename, rev)
 415
 416def export_tag(repo, tag):
 417    export_ref(repo, tag, 'tags', repo[tag])
 418
 419def export_bookmark(repo, bmark):
 420    head = bmarks[bmark]
 421    export_ref(repo, bmark, 'bookmarks', head)
 422
 423def export_branch(repo, branch):
 424    tip = get_branch_tip(repo, branch)
 425    head = repo[tip]
 426    export_ref(repo, branch, 'branches', head)
 427
 428def export_head(repo):
 429    global g_head
 430    export_ref(repo, g_head[0], 'bookmarks', g_head[1])
 431
 432def do_capabilities(parser):
 433    global prefix, dirname
 434
 435    print "import"
 436    print "export"
 437    print "refspec refs/heads/branches/*:%s/branches/*" % prefix
 438    print "refspec refs/heads/*:%s/bookmarks/*" % prefix
 439    print "refspec refs/tags/*:%s/tags/*" % prefix
 440
 441    path = os.path.join(dirname, 'marks-git')
 442
 443    if os.path.exists(path):
 444        print "*import-marks %s" % path
 445    print "*export-marks %s" % path
 446
 447    print
 448
 449def get_branch_tip(repo, branch):
 450    global branches
 451
 452    heads = branches.get(branch, None)
 453    if not heads:
 454        return None
 455
 456    # verify there's only one head
 457    if (len(heads) > 1):
 458        warn("Branch '%s' has more than one head, consider merging" % branch)
 459        # older versions of mercurial don't have this
 460        if hasattr(repo, "branchtip"):
 461            return repo.branchtip(branch)
 462
 463    return heads[0]
 464
 465def list_head(repo, cur):
 466    global g_head, bmarks
 467
 468    head = bookmarks.readcurrent(repo)
 469    if head:
 470        node = repo[head]
 471    else:
 472        # fake bookmark from current branch
 473        head = cur
 474        node = repo['.']
 475        if not node:
 476            node = repo['tip']
 477        if not node:
 478            return
 479        if head == 'default':
 480            head = 'master'
 481        bmarks[head] = node
 482
 483    print "@refs/heads/%s HEAD" % head
 484    g_head = (head, node)
 485
 486def do_list(parser):
 487    global branches, bmarks, mode, track_branches
 488
 489    repo = parser.repo
 490    for bmark, node in bookmarks.listbookmarks(repo).iteritems():
 491        bmarks[bmark] = repo[node]
 492
 493    cur = repo.dirstate.branch()
 494
 495    list_head(repo, cur)
 496
 497    if track_branches:
 498        for branch in repo.branchmap():
 499            heads = repo.branchheads(branch)
 500            if len(heads):
 501                branches[branch] = heads
 502
 503        for branch in branches:
 504            print "? refs/heads/branches/%s" % branch
 505
 506    for bmark in bmarks:
 507        print "? refs/heads/%s" % bmark
 508
 509    for tag, node in repo.tagslist():
 510        if tag == 'tip':
 511            continue
 512        print "? refs/tags/%s" % tag
 513
 514    print
 515
 516def do_import(parser):
 517    repo = parser.repo
 518
 519    path = os.path.join(dirname, 'marks-git')
 520
 521    print "feature done"
 522    if os.path.exists(path):
 523        print "feature import-marks=%s" % path
 524    print "feature export-marks=%s" % path
 525    sys.stdout.flush()
 526
 527    tmp = encoding.encoding
 528    encoding.encoding = 'utf-8'
 529
 530    # lets get all the import lines
 531    while parser.check('import'):
 532        ref = parser[1]
 533
 534        if (ref == 'HEAD'):
 535            export_head(repo)
 536        elif ref.startswith('refs/heads/branches/'):
 537            branch = ref[len('refs/heads/branches/'):]
 538            export_branch(repo, branch)
 539        elif ref.startswith('refs/heads/'):
 540            bmark = ref[len('refs/heads/'):]
 541            export_bookmark(repo, bmark)
 542        elif ref.startswith('refs/tags/'):
 543            tag = ref[len('refs/tags/'):]
 544            export_tag(repo, tag)
 545
 546        parser.next()
 547
 548    encoding.encoding = tmp
 549
 550    print 'done'
 551
 552def parse_blob(parser):
 553    global blob_marks
 554
 555    parser.next()
 556    mark = parser.get_mark()
 557    parser.next()
 558    data = parser.get_data()
 559    blob_marks[mark] = data
 560    parser.next()
 561
 562def get_merge_files(repo, p1, p2, files):
 563    for e in repo[p1].files():
 564        if e not in files:
 565            if e not in repo[p1].manifest():
 566                continue
 567            f = { 'ctx' : repo[p1][e] }
 568            files[e] = f
 569
 570def parse_commit(parser):
 571    global marks, blob_marks, parsed_refs
 572    global mode
 573
 574    from_mark = merge_mark = None
 575
 576    ref = parser[1]
 577    parser.next()
 578
 579    commit_mark = parser.get_mark()
 580    parser.next()
 581    author = parser.get_author()
 582    parser.next()
 583    committer = parser.get_author()
 584    parser.next()
 585    data = parser.get_data()
 586    parser.next()
 587    if parser.check('from'):
 588        from_mark = parser.get_mark()
 589        parser.next()
 590    if parser.check('merge'):
 591        merge_mark = parser.get_mark()
 592        parser.next()
 593        if parser.check('merge'):
 594            die('octopus merges are not supported yet')
 595
 596    files = {}
 597
 598    for line in parser:
 599        if parser.check('M'):
 600            t, m, mark_ref, path = line.split(' ', 3)
 601            mark = int(mark_ref[1:])
 602            f = { 'mode' : hgmode(m), 'data' : blob_marks[mark] }
 603        elif parser.check('D'):
 604            t, path = line.split(' ', 1)
 605            f = { 'deleted' : True }
 606        else:
 607            die('Unknown file command: %s' % line)
 608        files[path] = f
 609
 610    def getfilectx(repo, memctx, f):
 611        of = files[f]
 612        if 'deleted' in of:
 613            raise IOError
 614        if 'ctx' in of:
 615            return of['ctx']
 616        is_exec = of['mode'] == 'x'
 617        is_link = of['mode'] == 'l'
 618        rename = of.get('rename', None)
 619        return context.memfilectx(f, of['data'],
 620                is_link, is_exec, rename)
 621
 622    repo = parser.repo
 623
 624    user, date, tz = author
 625    extra = {}
 626
 627    if committer != author:
 628        extra['committer'] = "%s %u %u" % committer
 629
 630    if from_mark:
 631        p1 = repo.changelog.node(mark_to_rev(from_mark))
 632    else:
 633        p1 = '\0' * 20
 634
 635    if merge_mark:
 636        p2 = repo.changelog.node(mark_to_rev(merge_mark))
 637    else:
 638        p2 = '\0' * 20
 639
 640    #
 641    # If files changed from any of the parents, hg wants to know, but in git if
 642    # nothing changed from the first parent, nothing changed.
 643    #
 644    if merge_mark:
 645        get_merge_files(repo, p1, p2, files)
 646
 647    # Check if the ref is supposed to be a named branch
 648    if ref.startswith('refs/heads/branches/'):
 649        extra['branch'] = ref[len('refs/heads/branches/'):]
 650
 651    if mode == 'hg':
 652        i = data.find('\n--HG--\n')
 653        if i >= 0:
 654            tmp = data[i + len('\n--HG--\n'):].strip()
 655            for k, v in [e.split(' : ', 1) for e in tmp.split('\n')]:
 656                if k == 'rename':
 657                    old, new = v.split(' => ', 1)
 658                    files[new]['rename'] = old
 659                elif k == 'branch':
 660                    extra[k] = v
 661                elif k == 'extra':
 662                    ek, ev = v.split(' : ', 1)
 663                    extra[ek] = urllib.unquote(ev)
 664            data = data[:i]
 665
 666    ctx = context.memctx(repo, (p1, p2), data,
 667            files.keys(), getfilectx,
 668            user, (date, tz), extra)
 669
 670    tmp = encoding.encoding
 671    encoding.encoding = 'utf-8'
 672
 673    node = repo.commitctx(ctx)
 674
 675    encoding.encoding = tmp
 676
 677    rev = repo[node].rev()
 678
 679    parsed_refs[ref] = node
 680    marks.new_mark(rev, commit_mark)
 681
 682def parse_reset(parser):
 683    global parsed_refs
 684
 685    ref = parser[1]
 686    parser.next()
 687    # ugh
 688    if parser.check('commit'):
 689        parse_commit(parser)
 690        return
 691    if not parser.check('from'):
 692        return
 693    from_mark = parser.get_mark()
 694    parser.next()
 695
 696    node = parser.repo.changelog.node(mark_to_rev(from_mark))
 697    parsed_refs[ref] = node
 698
 699def parse_tag(parser):
 700    name = parser[1]
 701    parser.next()
 702    from_mark = parser.get_mark()
 703    parser.next()
 704    tagger = parser.get_author()
 705    parser.next()
 706    data = parser.get_data()
 707    parser.next()
 708
 709    # nothing to do
 710
 711def do_export(parser):
 712    global parsed_refs, bmarks, peer
 713
 714    p_bmarks = []
 715
 716    parser.next()
 717
 718    for line in parser.each_block('done'):
 719        if parser.check('blob'):
 720            parse_blob(parser)
 721        elif parser.check('commit'):
 722            parse_commit(parser)
 723        elif parser.check('reset'):
 724            parse_reset(parser)
 725        elif parser.check('tag'):
 726            parse_tag(parser)
 727        elif parser.check('feature'):
 728            pass
 729        else:
 730            die('unhandled export command: %s' % line)
 731
 732    for ref, node in parsed_refs.iteritems():
 733        if ref.startswith('refs/heads/branches'):
 734            print "ok %s" % ref
 735        elif ref.startswith('refs/heads/'):
 736            bmark = ref[len('refs/heads/'):]
 737            p_bmarks.append((bmark, node))
 738            continue
 739        elif ref.startswith('refs/tags/'):
 740            tag = ref[len('refs/tags/'):]
 741            if mode == 'git':
 742                msg = 'Added tag %s for changeset %s' % (tag, hghex(node[:6]));
 743                parser.repo.tag([tag], node, msg, False, None, {})
 744            else:
 745                parser.repo.tag([tag], node, None, True, None, {})
 746            print "ok %s" % ref
 747        else:
 748            # transport-helper/fast-export bugs
 749            continue
 750
 751    if peer:
 752        parser.repo.push(peer, force=force_push)
 753
 754    # handle bookmarks
 755    for bmark, node in p_bmarks:
 756        ref = 'refs/heads/' + bmark
 757        new = hghex(node)
 758
 759        if bmark in bmarks:
 760            old = bmarks[bmark].hex()
 761        else:
 762            old = ''
 763
 764        if bmark == 'master' and 'master' not in parser.repo._bookmarks:
 765            # fake bookmark
 766            pass
 767        elif bookmarks.pushbookmark(parser.repo, bmark, old, new):
 768            # updated locally
 769            pass
 770        else:
 771            print "error %s" % ref
 772            continue
 773
 774        if peer:
 775            if not peer.pushkey('bookmarks', bmark, old, new):
 776                print "error %s" % ref
 777                continue
 778
 779        print "ok %s" % ref
 780
 781    print
 782
 783def fix_path(alias, repo, orig_url):
 784    repo_url = util.url(repo.url())
 785    url = util.url(orig_url)
 786    if str(url) == str(repo_url):
 787        return
 788    cmd = ['git', 'config', 'remote.%s.url' % alias, "hg::%s" % repo_url]
 789    subprocess.call(cmd)
 790
 791def main(args):
 792    global prefix, dirname, branches, bmarks
 793    global marks, blob_marks, parsed_refs
 794    global peer, mode, bad_mail, bad_name
 795    global track_branches, force_push, is_tmp
 796
 797    alias = args[1]
 798    url = args[2]
 799    peer = None
 800
 801    hg_git_compat = False
 802    track_branches = True
 803    force_push = True
 804
 805    try:
 806        if get_config('remote-hg.hg-git-compat') == 'true\n':
 807            hg_git_compat = True
 808            track_branches = False
 809        if get_config('remote-hg.track-branches') == 'false\n':
 810            track_branches = False
 811        if get_config('remote-hg.force-push') == 'false\n':
 812            force_push = False
 813    except subprocess.CalledProcessError:
 814        pass
 815
 816    if hg_git_compat:
 817        mode = 'hg'
 818        bad_mail = 'none@none'
 819        bad_name = ''
 820    else:
 821        mode = 'git'
 822        bad_mail = 'unknown'
 823        bad_name = 'Unknown'
 824
 825    if alias[4:] == url:
 826        is_tmp = True
 827        alias = util.sha1(alias).hexdigest()
 828    else:
 829        is_tmp = False
 830
 831    gitdir = os.environ['GIT_DIR']
 832    dirname = os.path.join(gitdir, 'hg', alias)
 833    branches = {}
 834    bmarks = {}
 835    blob_marks = {}
 836    parsed_refs = {}
 837    marks = None
 838
 839    repo = get_repo(url, alias)
 840    prefix = 'refs/hg/%s' % alias
 841
 842    if not is_tmp:
 843        fix_path(alias, peer or repo, url)
 844
 845    if not os.path.exists(dirname):
 846        os.makedirs(dirname)
 847
 848    marks_path = os.path.join(dirname, 'marks-hg')
 849    marks = Marks(marks_path)
 850
 851    parser = Parser(repo)
 852    for line in parser:
 853        if parser.check('capabilities'):
 854            do_capabilities(parser)
 855        elif parser.check('list'):
 856            do_list(parser)
 857        elif parser.check('import'):
 858            do_import(parser)
 859        elif parser.check('export'):
 860            do_export(parser)
 861        else:
 862            die('unhandled command: %s' % line)
 863        sys.stdout.flush()
 864
 865def bye():
 866    if not marks:
 867        return
 868    if not is_tmp:
 869        marks.store()
 870    else:
 871        shutil.rmtree(dirname)
 872
 873atexit.register(bye)
 874sys.exit(main(sys.argv))