Andrew's git - gitweb.git/blob

0db4ccae537ffbd0b8c47f0a050ded88e3d0d40c
   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 $PATH.
   9# Then you can clone with:
  10# git clone hg::/path/to/mercurial/repo/
  11#
  12# For remote repositories a local clone is stored in
  13# "$GIT_DIR/hg/origin/clone/.hg/".
  14
  15from mercurial import hg, ui, bookmarks, context, util, encoding, node, error
  16
  17import re
  18import sys
  19import os
  20import json
  21import shutil
  22import subprocess
  23import urllib
  24import atexit
  25
  26#
  27# If you want to switch to hg-git compatibility mode:
  28# git config --global remote-hg.hg-git-compat true
  29#
  30# If you are not in hg-git-compat mode and want to disable the tracking of
  31# named branches:
  32# git config --global remote-hg.track-branches false
  33#
  34# If you don't want to force pushes (and thus risk creating new remote heads):
  35# git config --global remote-hg.force-push false
  36#
  37# If you want the equivalent of hg's clone/pull--insecure option:
  38# git config remote-hg.insecure true
  39#
  40# git:
  41# Sensible defaults for git.
  42# hg bookmarks are exported as git branches, hg branches are prefixed
  43# with 'branches/', HEAD is a special case.
  44#
  45# hg:
  46# Emulate hg-git.
  47# Only hg bookmarks are exported as git branches.
  48# Commits are modified to preserve hg information and allow bidirectionality.
  49#
  50
  51NAME_RE = re.compile('^([^<>]+)')
  52AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
  53AUTHOR_HG_RE = re.compile('^(.*?) ?<(.*?)(?:>(.+)?)?$')
  54RAW_AUTHOR_RE = re.compile('^(\w+) (?:(.+)? )?<(.*)> (\d+) ([+-]\d+)')
  55
  56def die(msg, *args):
  57    sys.stderr.write('ERROR: %s\n' % (msg % args))
  58    sys.exit(1)
  59
  60def warn(msg, *args):
  61    sys.stderr.write('WARNING: %s\n' % (msg % args))
  62
  63def gitmode(flags):
  64    return 'l' in flags and '120000' or 'x' in flags and '100755' or '100644'
  65
  66def gittz(tz):
  67    return '%+03d%02d' % (-tz / 3600, -tz % 3600 / 60)
  68
  69def hgmode(mode):
  70    m = { '100755': 'x', '120000': 'l' }
  71    return m.get(mode, '')
  72
  73def hghex(node):
  74    return hg.node.hex(node)
  75
  76def get_config(config):
  77    cmd = ['git', 'config', '--get', config]
  78    process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
  79    output, _ = process.communicate()
  80    return output
  81
  82class Marks:
  83
  84    def __init__(self, path):
  85        self.path = path
  86        self.tips = {}
  87        self.marks = {}
  88        self.rev_marks = {}
  89        self.last_mark = 0
  90
  91        self.load()
  92
  93    def load(self):
  94        if not os.path.exists(self.path):
  95            return
  96
  97        tmp = json.load(open(self.path))
  98
  99        self.tips = tmp['tips']
 100        self.marks = tmp['marks']
 101        self.last_mark = tmp['last-mark']
 102
 103        for rev, mark in self.marks.iteritems():
 104            self.rev_marks[mark] = int(rev)
 105
 106    def dict(self):
 107        return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark }
 108
 109    def store(self):
 110        json.dump(self.dict(), open(self.path, 'w'))
 111
 112    def __str__(self):
 113        return str(self.dict())
 114
 115    def from_rev(self, rev):
 116        return self.marks[str(rev)]
 117
 118    def to_rev(self, mark):
 119        return self.rev_marks[mark]
 120
 121    def get_mark(self, rev):
 122        self.last_mark += 1
 123        self.marks[str(rev)] = self.last_mark
 124        return self.last_mark
 125
 126    def new_mark(self, rev, mark):
 127        self.marks[str(rev)] = mark
 128        self.rev_marks[mark] = rev
 129        self.last_mark = mark
 130
 131    def is_marked(self, rev):
 132        return self.marks.has_key(str(rev))
 133
 134    def get_tip(self, branch):
 135        return self.tips.get(branch, 0)
 136
 137    def set_tip(self, branch, tip):
 138        self.tips[branch] = tip
 139
 140class Parser:
 141
 142    def __init__(self, repo):
 143        self.repo = repo
 144        self.line = self.get_line()
 145
 146    def get_line(self):
 147        return sys.stdin.readline().strip()
 148
 149    def __getitem__(self, i):
 150        return self.line.split()[i]
 151
 152    def check(self, word):
 153        return self.line.startswith(word)
 154
 155    def each_block(self, separator):
 156        while self.line != separator:
 157            yield self.line
 158            self.line = self.get_line()
 159
 160    def __iter__(self):
 161        return self.each_block('')
 162
 163    def next(self):
 164        self.line = self.get_line()
 165        if self.line == 'done':
 166            self.line = None
 167
 168    def get_mark(self):
 169        i = self.line.index(':') + 1
 170        return int(self.line[i:])
 171
 172    def get_data(self):
 173        if not self.check('data'):
 174            return None
 175        i = self.line.index(' ') + 1
 176        size = int(self.line[i:])
 177        return sys.stdin.read(size)
 178
 179    def get_author(self):
 180        global bad_mail
 181
 182        ex = None
 183        m = RAW_AUTHOR_RE.match(self.line)
 184        if not m:
 185            return None
 186        _, name, email, date, tz = m.groups()
 187        if name and 'ext:' in name:
 188            m = re.match('^(.+?) ext:\((.+)\)$', name)
 189            if m:
 190                name = m.group(1)
 191                ex = urllib.unquote(m.group(2))
 192
 193        if email != bad_mail:
 194            if name:
 195                user = '%s <%s>' % (name, email)
 196            else:
 197                user = '<%s>' % (email)
 198        else:
 199            user = name
 200
 201        if ex:
 202            user += ex
 203
 204        tz = int(tz)
 205        tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
 206        return (user, int(date), -tz)
 207
 208def export_file(fc):
 209    d = fc.data()
 210    print "M %s inline %s" % (gitmode(fc.flags()), fc.path())
 211    print "data %d" % len(d)
 212    print d
 213
 214def get_filechanges(repo, ctx, parent):
 215    modified = set()
 216    added = set()
 217    removed = set()
 218
 219    cur = ctx.manifest()
 220    prev = repo[parent].manifest().copy()
 221
 222    for fn in cur:
 223        if fn in prev:
 224            if (cur.flags(fn) != prev.flags(fn) or cur[fn] != prev[fn]):
 225                modified.add(fn)
 226            del prev[fn]
 227        else:
 228            added.add(fn)
 229    removed |= set(prev.keys())
 230
 231    return added | modified, removed
 232
 233def fixup_user_git(user):
 234    name = mail = None
 235    user = user.replace('"', '')
 236    m = AUTHOR_RE.match(user)
 237    if m:
 238        name = m.group(1)
 239        mail = m.group(2).strip()
 240    else:
 241        m = NAME_RE.match(user)
 242        if m:
 243            name = m.group(1).strip()
 244    return (name, mail)
 245
 246def fixup_user_hg(user):
 247    def sanitize(name):
 248        # stole this from hg-git
 249        return re.sub('[<>\n]', '?', name.lstrip('< ').rstrip('> '))
 250
 251    m = AUTHOR_HG_RE.match(user)
 252    if m:
 253        name = sanitize(m.group(1))
 254        mail = sanitize(m.group(2))
 255        ex = m.group(3)
 256        if ex:
 257            name += ' ext:(' + urllib.quote(ex) + ')'
 258    else:
 259        name = sanitize(user)
 260        if '@' in user:
 261            mail = name
 262        else:
 263            mail = None
 264
 265    return (name, mail)
 266
 267def fixup_user(user):
 268    global mode, bad_mail
 269
 270    if mode == 'git':
 271        name, mail = fixup_user_git(user)
 272    else:
 273        name, mail = fixup_user_hg(user)
 274
 275    if not name:
 276        name = bad_name
 277    if not mail:
 278        mail = bad_mail
 279
 280    return '%s <%s>' % (name, mail)
 281
 282def get_repo(url, alias):
 283    global dirname, peer
 284
 285    myui = ui.ui()
 286    myui.setconfig('ui', 'interactive', 'off')
 287    myui.fout = sys.stderr
 288
 289    try:
 290        if get_config('remote-hg.insecure') == 'true\n':
 291            myui.setconfig('web', 'cacerts', '')
 292    except subprocess.CalledProcessError:
 293        pass
 294
 295    if hg.islocal(url):
 296        repo = hg.repository(myui, url)
 297    else:
 298        local_path = os.path.join(dirname, 'clone')
 299        if not os.path.exists(local_path):
 300            try:
 301                peer, dstpeer = hg.clone(myui, {}, url, local_path, update=True, pull=True)
 302            except:
 303                die('Repository error')
 304            repo = dstpeer.local()
 305        else:
 306            repo = hg.repository(myui, local_path)
 307            try:
 308                peer = hg.peer(myui, {}, url)
 309            except:
 310                die('Repository error')
 311            repo.pull(peer, heads=None, force=True)
 312
 313    return repo
 314
 315def rev_to_mark(rev):
 316    global marks
 317    return marks.from_rev(rev)
 318
 319def mark_to_rev(mark):
 320    global marks
 321    return marks.to_rev(mark)
 322
 323def export_ref(repo, name, kind, head):
 324    global prefix, marks, mode
 325
 326    ename = '%s/%s' % (kind, name)
 327    tip = marks.get_tip(ename)
 328
 329    # mercurial takes too much time checking this
 330    if tip and tip == head.rev():
 331        # nothing to do
 332        return
 333    revs = xrange(tip, head.rev() + 1)
 334    count = 0
 335
 336    revs = [rev for rev in revs if not marks.is_marked(rev)]
 337
 338    for rev in revs:
 339
 340        c = repo[rev]
 341        (manifest, user, (time, tz), files, desc, extra) = repo.changelog.read(c.node())
 342        rev_branch = extra['branch']
 343
 344        author = "%s %d %s" % (fixup_user(user), time, gittz(tz))
 345        if 'committer' in extra:
 346            user, time, tz = extra['committer'].rsplit(' ', 2)
 347            committer = "%s %s %s" % (user, time, gittz(int(tz)))
 348        else:
 349            committer = author
 350
 351        parents = [p for p in repo.changelog.parentrevs(rev) if p >= 0]
 352
 353        if len(parents) == 0:
 354            modified = c.manifest().keys()
 355            removed = []
 356        else:
 357            modified, removed = get_filechanges(repo, c, parents[0])
 358
 359        if mode == 'hg':
 360            extra_msg = ''
 361
 362            if rev_branch != 'default':
 363                extra_msg += 'branch : %s\n' % rev_branch
 364
 365            renames = []
 366            for f in c.files():
 367                if f not in c.manifest():
 368                    continue
 369                rename = c.filectx(f).renamed()
 370                if rename:
 371                    renames.append((rename[0], f))
 372
 373            for e in renames:
 374                extra_msg += "rename : %s => %s\n" % e
 375
 376            for key, value in extra.iteritems():
 377                if key in ('author', 'committer', 'encoding', 'message', 'branch', 'hg-git'):
 378                    continue
 379                else:
 380                    extra_msg += "extra : %s : %s\n" % (key, urllib.quote(value))
 381
 382            desc += '\n'
 383            if extra_msg:
 384                desc += '\n--HG--\n' + extra_msg
 385
 386        if len(parents) == 0 and rev:
 387            print 'reset %s/%s' % (prefix, ename)
 388
 389        print "commit %s/%s" % (prefix, ename)
 390        print "mark :%d" % (marks.get_mark(rev))
 391        print "author %s" % (author)
 392        print "committer %s" % (committer)
 393        print "data %d" % (len(desc))
 394        print desc
 395
 396        if len(parents) > 0:
 397            print "from :%s" % (rev_to_mark(parents[0]))
 398            if len(parents) > 1:
 399                print "merge :%s" % (rev_to_mark(parents[1]))
 400
 401        for f in modified:
 402            export_file(c.filectx(f))
 403        for f in removed:
 404            print "D %s" % (f)
 405        print
 406
 407        count += 1
 408        if (count % 100 == 0):
 409            print "progress revision %d '%s' (%d/%d)" % (rev, name, count, len(revs))
 410            print "#############################################################"
 411
 412    # make sure the ref is updated
 413    print "reset %s/%s" % (prefix, ename)
 414    print "from :%u" % rev_to_mark(rev)
 415    print
 416
 417    marks.set_tip(ename, rev)
 418
 419def export_tag(repo, tag):
 420    export_ref(repo, tag, 'tags', repo[tag])
 421
 422def export_bookmark(repo, bmark):
 423    head = bmarks[bmark]
 424    export_ref(repo, bmark, 'bookmarks', head)
 425
 426def export_branch(repo, branch):
 427    tip = get_branch_tip(repo, branch)
 428    head = repo[tip]
 429    export_ref(repo, branch, 'branches', head)
 430
 431def export_head(repo):
 432    global g_head
 433    export_ref(repo, g_head[0], 'bookmarks', g_head[1])
 434
 435def do_capabilities(parser):
 436    global prefix, dirname
 437
 438    print "import"
 439    print "export"
 440    print "refspec refs/heads/branches/*:%s/branches/*" % prefix
 441    print "refspec refs/heads/*:%s/bookmarks/*" % prefix
 442    print "refspec refs/tags/*:%s/tags/*" % prefix
 443
 444    path = os.path.join(dirname, 'marks-git')
 445
 446    if os.path.exists(path):
 447        print "*import-marks %s" % path
 448    print "*export-marks %s" % path
 449
 450    print
 451
 452def get_branch_tip(repo, branch):
 453    global branches
 454
 455    heads = branches.get(branch, None)
 456    if not heads:
 457        return None
 458
 459    # verify there's only one head
 460    if (len(heads) > 1):
 461        warn("Branch '%s' has more than one head, consider merging" % branch)
 462        # older versions of mercurial don't have this
 463        if hasattr(repo, "branchtip"):
 464            return repo.branchtip(branch)
 465
 466    return heads[0]
 467
 468def list_head(repo, cur):
 469    global g_head, bmarks
 470
 471    head = bookmarks.readcurrent(repo)
 472    if head:
 473        node = repo[head]
 474    else:
 475        # fake bookmark from current branch
 476        head = cur
 477        node = repo['.']
 478        if not node:
 479            node = repo['tip']
 480        if not node:
 481            return
 482        if head == 'default':
 483            head = 'master'
 484        bmarks[head] = node
 485
 486    print "@refs/heads/%s HEAD" % head
 487    g_head = (head, node)
 488
 489def do_list(parser):
 490    global branches, bmarks, mode, track_branches
 491
 492    repo = parser.repo
 493    for bmark, node in bookmarks.listbookmarks(repo).iteritems():
 494        bmarks[bmark] = repo[node]
 495
 496    cur = repo.dirstate.branch()
 497
 498    list_head(repo, cur)
 499
 500    if track_branches:
 501        for branch in repo.branchmap():
 502            heads = repo.branchheads(branch)
 503            if len(heads):
 504                branches[branch] = heads
 505
 506        for branch in branches:
 507            print "? refs/heads/branches/%s" % branch
 508
 509    for bmark in bmarks:
 510        print "? refs/heads/%s" % bmark
 511
 512    for tag, node in repo.tagslist():
 513        if tag == 'tip':
 514            continue
 515        print "? refs/tags/%s" % tag
 516
 517    print
 518
 519def do_import(parser):
 520    repo = parser.repo
 521
 522    path = os.path.join(dirname, 'marks-git')
 523
 524    print "feature done"
 525    if os.path.exists(path):
 526        print "feature import-marks=%s" % path
 527    print "feature export-marks=%s" % path
 528    sys.stdout.flush()
 529
 530    tmp = encoding.encoding
 531    encoding.encoding = 'utf-8'
 532
 533    # lets get all the import lines
 534    while parser.check('import'):
 535        ref = parser[1]
 536
 537        if (ref == 'HEAD'):
 538            export_head(repo)
 539        elif ref.startswith('refs/heads/branches/'):
 540            branch = ref[len('refs/heads/branches/'):]
 541            export_branch(repo, branch)
 542        elif ref.startswith('refs/heads/'):
 543            bmark = ref[len('refs/heads/'):]
 544            export_bookmark(repo, bmark)
 545        elif ref.startswith('refs/tags/'):
 546            tag = ref[len('refs/tags/'):]
 547            export_tag(repo, tag)
 548
 549        parser.next()
 550
 551    encoding.encoding = tmp
 552
 553    print 'done'
 554
 555def parse_blob(parser):
 556    global blob_marks
 557
 558    parser.next()
 559    mark = parser.get_mark()
 560    parser.next()
 561    data = parser.get_data()
 562    blob_marks[mark] = data
 563    parser.next()
 564
 565def get_merge_files(repo, p1, p2, files):
 566    for e in repo[p1].files():
 567        if e not in files:
 568            if e not in repo[p1].manifest():
 569                continue
 570            f = { 'ctx' : repo[p1][e] }
 571            files[e] = f
 572
 573def parse_commit(parser):
 574    global marks, blob_marks, parsed_refs
 575    global mode
 576
 577    from_mark = merge_mark = None
 578
 579    ref = parser[1]
 580    parser.next()
 581
 582    commit_mark = parser.get_mark()
 583    parser.next()
 584    author = parser.get_author()
 585    parser.next()
 586    committer = parser.get_author()
 587    parser.next()
 588    data = parser.get_data()
 589    parser.next()
 590    if parser.check('from'):
 591        from_mark = parser.get_mark()
 592        parser.next()
 593    if parser.check('merge'):
 594        merge_mark = parser.get_mark()
 595        parser.next()
 596        if parser.check('merge'):
 597            die('octopus merges are not supported yet')
 598
 599    files = {}
 600
 601    for line in parser:
 602        if parser.check('M'):
 603            t, m, mark_ref, path = line.split(' ', 3)
 604            mark = int(mark_ref[1:])
 605            f = { 'mode' : hgmode(m), 'data' : blob_marks[mark] }
 606        elif parser.check('D'):
 607            t, path = line.split(' ', 1)
 608            f = { 'deleted' : True }
 609        else:
 610            die('Unknown file command: %s' % line)
 611        files[path] = f
 612
 613    def getfilectx(repo, memctx, f):
 614        of = files[f]
 615        if 'deleted' in of:
 616            raise IOError
 617        if 'ctx' in of:
 618            return of['ctx']
 619        is_exec = of['mode'] == 'x'
 620        is_link = of['mode'] == 'l'
 621        rename = of.get('rename', None)
 622        return context.memfilectx(f, of['data'],
 623                is_link, is_exec, rename)
 624
 625    repo = parser.repo
 626
 627    user, date, tz = author
 628    extra = {}
 629
 630    if committer != author:
 631        extra['committer'] = "%s %u %u" % committer
 632
 633    if from_mark:
 634        p1 = repo.changelog.node(mark_to_rev(from_mark))
 635    else:
 636        p1 = '\0' * 20
 637
 638    if merge_mark:
 639        p2 = repo.changelog.node(mark_to_rev(merge_mark))
 640    else:
 641        p2 = '\0' * 20
 642
 643    #
 644    # If files changed from any of the parents, hg wants to know, but in git if
 645    # nothing changed from the first parent, nothing changed.
 646    #
 647    if merge_mark:
 648        get_merge_files(repo, p1, p2, files)
 649
 650    # Check if the ref is supposed to be a named branch
 651    if ref.startswith('refs/heads/branches/'):
 652        extra['branch'] = ref[len('refs/heads/branches/'):]
 653
 654    if mode == 'hg':
 655        i = data.find('\n--HG--\n')
 656        if i >= 0:
 657            tmp = data[i + len('\n--HG--\n'):].strip()
 658            for k, v in [e.split(' : ', 1) for e in tmp.split('\n')]:
 659                if k == 'rename':
 660                    old, new = v.split(' => ', 1)
 661                    files[new]['rename'] = old
 662                elif k == 'branch':
 663                    extra[k] = v
 664                elif k == 'extra':
 665                    ek, ev = v.split(' : ', 1)
 666                    extra[ek] = urllib.unquote(ev)
 667            data = data[:i]
 668
 669    ctx = context.memctx(repo, (p1, p2), data,
 670            files.keys(), getfilectx,
 671            user, (date, tz), extra)
 672
 673    tmp = encoding.encoding
 674    encoding.encoding = 'utf-8'
 675
 676    node = repo.commitctx(ctx)
 677
 678    encoding.encoding = tmp
 679
 680    rev = repo[node].rev()
 681
 682    parsed_refs[ref] = node
 683    marks.new_mark(rev, commit_mark)
 684
 685def parse_reset(parser):
 686    global parsed_refs
 687
 688    ref = parser[1]
 689    parser.next()
 690    # ugh
 691    if parser.check('commit'):
 692        parse_commit(parser)
 693        return
 694    if not parser.check('from'):
 695        return
 696    from_mark = parser.get_mark()
 697    parser.next()
 698
 699    node = parser.repo.changelog.node(mark_to_rev(from_mark))
 700    parsed_refs[ref] = node
 701
 702def parse_tag(parser):
 703    name = parser[1]
 704    parser.next()
 705    from_mark = parser.get_mark()
 706    parser.next()
 707    tagger = parser.get_author()
 708    parser.next()
 709    data = parser.get_data()
 710    parser.next()
 711
 712    # nothing to do
 713
 714def do_export(parser):
 715    global parsed_refs, bmarks, peer
 716
 717    p_bmarks = []
 718
 719    parser.next()
 720
 721    for line in parser.each_block('done'):
 722        if parser.check('blob'):
 723            parse_blob(parser)
 724        elif parser.check('commit'):
 725            parse_commit(parser)
 726        elif parser.check('reset'):
 727            parse_reset(parser)
 728        elif parser.check('tag'):
 729            parse_tag(parser)
 730        elif parser.check('feature'):
 731            pass
 732        else:
 733            die('unhandled export command: %s' % line)
 734
 735    for ref, node in parsed_refs.iteritems():
 736        if ref.startswith('refs/heads/branches'):
 737            print "ok %s" % ref
 738        elif ref.startswith('refs/heads/'):
 739            bmark = ref[len('refs/heads/'):]
 740            p_bmarks.append((bmark, node))
 741            continue
 742        elif ref.startswith('refs/tags/'):
 743            tag = ref[len('refs/tags/'):]
 744            if mode == 'git':
 745                msg = 'Added tag %s for changeset %s' % (tag, hghex(node[:6]));
 746                parser.repo.tag([tag], node, msg, False, None, {})
 747            else:
 748                parser.repo.tag([tag], node, None, True, None, {})
 749            print "ok %s" % ref
 750        else:
 751            # transport-helper/fast-export bugs
 752            continue
 753
 754    if peer:
 755        parser.repo.push(peer, force=force_push)
 756
 757    # handle bookmarks
 758    for bmark, node in p_bmarks:
 759        ref = 'refs/heads/' + bmark
 760        new = hghex(node)
 761
 762        if bmark in bmarks:
 763            old = bmarks[bmark].hex()
 764        else:
 765            old = ''
 766
 767        if bmark == 'master' and 'master' not in parser.repo._bookmarks:
 768            # fake bookmark
 769            pass
 770        elif bookmarks.pushbookmark(parser.repo, bmark, old, new):
 771            # updated locally
 772            pass
 773        else:
 774            print "error %s" % ref
 775            continue
 776
 777        if peer:
 778            if not peer.pushkey('bookmarks', bmark, old, new):
 779                print "error %s" % ref
 780                continue
 781
 782        print "ok %s" % ref
 783
 784    print
 785
 786def fix_path(alias, repo, orig_url):
 787    repo_url = util.url(repo.url())
 788    url = util.url(orig_url)
 789    if str(url) == str(repo_url):
 790        return
 791    cmd = ['git', 'config', 'remote.%s.url' % alias, "hg::%s" % repo_url]
 792    subprocess.call(cmd)
 793
 794def main(args):
 795    global prefix, dirname, branches, bmarks
 796    global marks, blob_marks, parsed_refs
 797    global peer, mode, bad_mail, bad_name
 798    global track_branches, force_push, is_tmp
 799
 800    alias = args[1]
 801    url = args[2]
 802    peer = None
 803
 804    hg_git_compat = False
 805    track_branches = True
 806    force_push = True
 807
 808    try:
 809        if get_config('remote-hg.hg-git-compat') == 'true\n':
 810            hg_git_compat = True
 811            track_branches = False
 812        if get_config('remote-hg.track-branches') == 'false\n':
 813            track_branches = False
 814        if get_config('remote-hg.force-push') == 'false\n':
 815            force_push = False
 816    except subprocess.CalledProcessError:
 817        pass
 818
 819    if hg_git_compat:
 820        mode = 'hg'
 821        bad_mail = 'none@none'
 822        bad_name = ''
 823    else:
 824        mode = 'git'
 825        bad_mail = 'unknown'
 826        bad_name = 'Unknown'
 827
 828    if alias[4:] == url:
 829        is_tmp = True
 830        alias = util.sha1(alias).hexdigest()
 831    else:
 832        is_tmp = False
 833
 834    gitdir = os.environ['GIT_DIR']
 835    dirname = os.path.join(gitdir, 'hg', alias)
 836    branches = {}
 837    bmarks = {}
 838    blob_marks = {}
 839    parsed_refs = {}
 840    marks = None
 841
 842    repo = get_repo(url, alias)
 843    prefix = 'refs/hg/%s' % alias
 844
 845    if not is_tmp:
 846        fix_path(alias, peer or repo, url)
 847
 848    if not os.path.exists(dirname):
 849        os.makedirs(dirname)
 850
 851    marks_path = os.path.join(dirname, 'marks-hg')
 852    marks = Marks(marks_path)
 853
 854    parser = Parser(repo)
 855    for line in parser:
 856        if parser.check('capabilities'):
 857            do_capabilities(parser)
 858        elif parser.check('list'):
 859            do_list(parser)
 860        elif parser.check('import'):
 861            do_import(parser)
 862        elif parser.check('export'):
 863            do_export(parser)
 864        else:
 865            die('unhandled command: %s' % line)
 866        sys.stdout.flush()
 867
 868def bye():
 869    if not marks:
 870        return
 871    if not is_tmp:
 872        marks.store()
 873    else:
 874        shutil.rmtree(dirname)
 875
 876atexit.register(bye)
 877sys.exit(main(sys.argv))