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

   1#!/usr/bin/env python
   2#
   3# Copyright (c) 2012 Felipe Contreras
   4#
   5
   6#
   7# Just copy to your ~/bin, or anywhere in your $PATH.
   8# Then you can clone with:
   9# % git clone bzr::/path/to/bzr/repo/or/url
  10#
  11# For example:
  12# % git clone bzr::$HOME/myrepo
  13# or
  14# % git clone bzr::lp:myrepo
  15#
  16# If you want to specify which branches you want track (per repo):
  17# git config remote-bzr.branches 'trunk, devel, test'
  18#
  19
  20import sys
  21
  22import bzrlib
  23if hasattr(bzrlib, "initialize"):
  24    bzrlib.initialize()
  25
  26import bzrlib.plugin
  27bzrlib.plugin.load_plugins()
  28
  29import bzrlib.generate_ids
  30import bzrlib.transport
  31import bzrlib.errors
  32import bzrlib.ui
  33import bzrlib.urlutils
  34
  35import sys
  36import os
  37import json
  38import re
  39import StringIO
  40import atexit, shutil, hashlib, urlparse, subprocess
  41
  42NAME_RE = re.compile('^([^<>]+)')
  43AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
  44EMAIL_RE = re.compile('^([^<>]+[^ \\\t<>])?\\b(?:[ \\t<>]*?)\\b([^ \\t<>]+@[^ \\t<>]+)')
  45RAW_AUTHOR_RE = re.compile('^(\w+) (.+)? <(.*)> (\d+) ([+-]\d+)')
  46
  47def die(msg, *args):
  48    sys.stderr.write('ERROR: %s\n' % (msg % args))
  49    sys.exit(1)
  50
  51def warn(msg, *args):
  52    sys.stderr.write('WARNING: %s\n' % (msg % args))
  53
  54def gittz(tz):
  55    return '%+03d%02d' % (tz / 3600, tz % 3600 / 60)
  56
  57def get_config(config):
  58    cmd = ['git', 'config', '--get', config]
  59    process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
  60    output, _ = process.communicate()
  61    return output
  62
  63class Marks:
  64
  65    def __init__(self, path):
  66        self.path = path
  67        self.tips = {}
  68        self.marks = {}
  69        self.rev_marks = {}
  70        self.last_mark = 0
  71        self.load()
  72
  73    def load(self):
  74        if not os.path.exists(self.path):
  75            return
  76
  77        tmp = json.load(open(self.path))
  78        self.tips = tmp['tips']
  79        self.marks = tmp['marks']
  80        self.last_mark = tmp['last-mark']
  81
  82        for rev, mark in self.marks.iteritems():
  83            self.rev_marks[mark] = rev
  84
  85    def dict(self):
  86        return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark }
  87
  88    def store(self):
  89        json.dump(self.dict(), open(self.path, 'w'))
  90
  91    def __str__(self):
  92        return str(self.dict())
  93
  94    def from_rev(self, rev):
  95        return self.marks[rev]
  96
  97    def to_rev(self, mark):
  98        return self.rev_marks[mark]
  99
 100    def next_mark(self):
 101        self.last_mark += 1
 102        return self.last_mark
 103
 104    def get_mark(self, rev):
 105        self.last_mark += 1
 106        self.marks[rev] = self.last_mark
 107        return self.last_mark
 108
 109    def is_marked(self, rev):
 110        return rev in self.marks
 111
 112    def new_mark(self, rev, mark):
 113        self.marks[rev] = mark
 114        self.rev_marks[mark] = rev
 115        self.last_mark = mark
 116
 117    def get_tip(self, branch):
 118        return self.tips.get(branch, None)
 119
 120    def set_tip(self, branch, tip):
 121        self.tips[branch] = tip
 122
 123class Parser:
 124
 125    def __init__(self, repo):
 126        self.repo = repo
 127        self.line = self.get_line()
 128
 129    def get_line(self):
 130        return sys.stdin.readline().strip()
 131
 132    def __getitem__(self, i):
 133        return self.line.split()[i]
 134
 135    def check(self, word):
 136        return self.line.startswith(word)
 137
 138    def each_block(self, separator):
 139        while self.line != separator:
 140            yield self.line
 141            self.line = self.get_line()
 142
 143    def __iter__(self):
 144        return self.each_block('')
 145
 146    def next(self):
 147        self.line = self.get_line()
 148        if self.line == 'done':
 149            self.line = None
 150
 151    def get_mark(self):
 152        i = self.line.index(':') + 1
 153        return int(self.line[i:])
 154
 155    def get_data(self):
 156        if not self.check('data'):
 157            return None
 158        i = self.line.index(' ') + 1
 159        size = int(self.line[i:])
 160        return sys.stdin.read(size)
 161
 162    def get_author(self):
 163        m = RAW_AUTHOR_RE.match(self.line)
 164        if not m:
 165            return None
 166        _, name, email, date, tz = m.groups()
 167        committer = '%s <%s>' % (name, email)
 168        tz = int(tz)
 169        tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
 170        return (committer, int(date), tz)
 171
 172def rev_to_mark(rev):
 173    global marks
 174    return marks.from_rev(rev)
 175
 176def mark_to_rev(mark):
 177    global marks
 178    return marks.to_rev(mark)
 179
 180def fixup_user(user):
 181    name = mail = None
 182    user = user.replace('"', '')
 183    m = AUTHOR_RE.match(user)
 184    if m:
 185        name = m.group(1)
 186        mail = m.group(2).strip()
 187    else:
 188        m = EMAIL_RE.match(user)
 189        if m:
 190            name = m.group(1)
 191            mail = m.group(2)
 192        else:
 193            m = NAME_RE.match(user)
 194            if m:
 195                name = m.group(1).strip()
 196
 197    if not name:
 198        name = 'unknown'
 199    if not mail:
 200        mail = 'Unknown'
 201
 202    return '%s <%s>' % (name, mail)
 203
 204def get_filechanges(cur, prev):
 205    modified = {}
 206    removed = {}
 207
 208    changes = cur.changes_from(prev)
 209
 210    def u(s):
 211        return s.encode('utf-8')
 212
 213    for path, fid, kind in changes.added:
 214        modified[u(path)] = fid
 215    for path, fid, kind in changes.removed:
 216        removed[u(path)] = None
 217    for path, fid, kind, mod, _ in changes.modified:
 218        modified[u(path)] = fid
 219    for oldpath, newpath, fid, kind, mod, _ in changes.renamed:
 220        removed[u(oldpath)] = None
 221        if kind == 'directory':
 222            lst = cur.list_files(from_dir=newpath, recursive=True)
 223            for path, file_class, kind, fid, entry in lst:
 224                if kind != 'directory':
 225                    modified[u(newpath + '/' + path)] = fid
 226        else:
 227            modified[u(newpath)] = fid
 228
 229    return modified, removed
 230
 231def export_files(tree, files):
 232    global marks, filenodes
 233
 234    final = []
 235    for path, fid in files.iteritems():
 236        kind = tree.kind(fid)
 237
 238        h = tree.get_file_sha1(fid)
 239
 240        if kind == 'symlink':
 241            d = tree.get_symlink_target(fid)
 242            mode = '120000'
 243        elif kind == 'file':
 244
 245            if tree.is_executable(fid):
 246                mode = '100755'
 247            else:
 248                mode = '100644'
 249
 250            # is the blob already exported?
 251            if h in filenodes:
 252                mark = filenodes[h]
 253                final.append((mode, mark, path))
 254                continue
 255
 256            d = tree.get_file_text(fid)
 257        elif kind == 'directory':
 258            continue
 259        else:
 260            die("Unhandled kind '%s' for path '%s'" % (kind, path))
 261
 262        mark = marks.next_mark()
 263        filenodes[h] = mark
 264
 265        print "blob"
 266        print "mark :%u" % mark
 267        print "data %d" % len(d)
 268        print d
 269
 270        final.append((mode, mark, path))
 271
 272    return final
 273
 274def export_branch(repo, name):
 275    global prefix
 276
 277    ref = '%s/heads/%s' % (prefix, name)
 278    tip = marks.get_tip(name)
 279
 280    branch = branches[name]
 281    repo = branch.repository
 282
 283    branch.lock_read()
 284    revs = branch.iter_merge_sorted_revisions(None, tip, 'exclude', 'forward')
 285    count = 0
 286
 287    revs = [revid for revid, _, _, _ in revs if not marks.is_marked(revid)]
 288
 289    for revid in revs:
 290
 291        rev = repo.get_revision(revid)
 292
 293        parents = rev.parent_ids
 294        time = rev.timestamp
 295        tz = rev.timezone
 296        committer = rev.committer.encode('utf-8')
 297        committer = "%s %u %s" % (fixup_user(committer), time, gittz(tz))
 298        authors = rev.get_apparent_authors()
 299        if authors:
 300            author = authors[0].encode('utf-8')
 301            author = "%s %u %s" % (fixup_user(author), time, gittz(tz))
 302        else:
 303            author = committer
 304        msg = rev.message.encode('utf-8')
 305
 306        msg += '\n'
 307
 308        if len(parents) == 0:
 309            parent = bzrlib.revision.NULL_REVISION
 310        else:
 311            parent = parents[0]
 312
 313        cur_tree = repo.revision_tree(revid)
 314        prev = repo.revision_tree(parent)
 315        modified, removed = get_filechanges(cur_tree, prev)
 316
 317        modified_final = export_files(cur_tree, modified)
 318
 319        if len(parents) == 0:
 320            print 'reset %s' % ref
 321
 322        print "commit %s" % ref
 323        print "mark :%d" % (marks.get_mark(revid))
 324        print "author %s" % (author)
 325        print "committer %s" % (committer)
 326        print "data %d" % (len(msg))
 327        print msg
 328
 329        for i, p in enumerate(parents):
 330            try:
 331                m = rev_to_mark(p)
 332            except KeyError:
 333                # ghost?
 334                continue
 335            if i == 0:
 336                print "from :%s" % m
 337            else:
 338                print "merge :%s" % m
 339
 340        for f in removed:
 341            print "D %s" % (f,)
 342        for f in modified_final:
 343            print "M %s :%u %s" % f
 344        print
 345
 346        count += 1
 347        if (count % 100 == 0):
 348            print "progress revision %s '%s' (%d/%d)" % (revid, name, count, len(revs))
 349            print "#############################################################"
 350
 351    branch.unlock()
 352
 353    revid = branch.last_revision()
 354
 355    # make sure the ref is updated
 356    print "reset %s" % ref
 357    print "from :%u" % rev_to_mark(revid)
 358    print
 359
 360    marks.set_tip(name, revid)
 361
 362def export_tag(repo, name):
 363    global tags, prefix
 364
 365    ref = '%s/tags/%s' % (prefix, name)
 366    print "reset %s" % ref
 367    print "from :%u" % rev_to_mark(tags[name])
 368    print
 369
 370def do_import(parser):
 371    global dirname
 372
 373    repo = parser.repo
 374    path = os.path.join(dirname, 'marks-git')
 375
 376    print "feature done"
 377    if os.path.exists(path):
 378        print "feature import-marks=%s" % path
 379    print "feature export-marks=%s" % path
 380    print "feature force"
 381    sys.stdout.flush()
 382
 383    while parser.check('import'):
 384        ref = parser[1]
 385        if ref.startswith('refs/heads/'):
 386            name = ref[len('refs/heads/'):]
 387            export_branch(repo, name)
 388        if ref.startswith('refs/tags/'):
 389            name = ref[len('refs/tags/'):]
 390            export_tag(repo, name)
 391        parser.next()
 392
 393    print 'done'
 394
 395    sys.stdout.flush()
 396
 397def parse_blob(parser):
 398    global blob_marks
 399
 400    parser.next()
 401    mark = parser.get_mark()
 402    parser.next()
 403    data = parser.get_data()
 404    blob_marks[mark] = data
 405    parser.next()
 406
 407class CustomTree():
 408
 409    def __init__(self, branch, revid, parents, files):
 410        global files_cache
 411
 412        self.updates = {}
 413        self.branch = branch
 414
 415        def copy_tree(revid):
 416            files = files_cache[revid] = {}
 417            branch.lock_read()
 418            tree = branch.repository.revision_tree(revid)
 419            try:
 420                for path, entry in tree.iter_entries_by_dir():
 421                    files[path] = [entry.file_id, None]
 422            finally:
 423                branch.unlock()
 424            return files
 425
 426        if len(parents) == 0:
 427            self.base_id = bzrlib.revision.NULL_REVISION
 428            self.base_files = {}
 429        else:
 430            self.base_id = parents[0]
 431            self.base_files = files_cache.get(self.base_id, None)
 432            if not self.base_files:
 433                self.base_files = copy_tree(self.base_id)
 434
 435        self.files = files_cache[revid] = self.base_files.copy()
 436        self.rev_files = {}
 437
 438        for path, data in self.files.iteritems():
 439            fid, mark = data
 440            self.rev_files[fid] = [path, mark]
 441
 442        for path, f in files.iteritems():
 443            fid, mark = self.files.get(path, [None, None])
 444            if not fid:
 445                fid = bzrlib.generate_ids.gen_file_id(path)
 446            f['path'] = path
 447            self.rev_files[fid] = [path, mark]
 448            self.updates[fid] = f
 449
 450    def last_revision(self):
 451        return self.base_id
 452
 453    def iter_changes(self):
 454        changes = []
 455
 456        def get_parent(dirname, basename):
 457            parent_fid, mark = self.base_files.get(dirname, [None, None])
 458            if parent_fid:
 459                return parent_fid
 460            parent_fid, mark = self.files.get(dirname, [None, None])
 461            if parent_fid:
 462                return parent_fid
 463            if basename == '':
 464                return None
 465            fid = bzrlib.generate_ids.gen_file_id(path)
 466            add_entry(fid, dirname, 'directory')
 467            return fid
 468
 469        def add_entry(fid, path, kind, mode = None):
 470            dirname, basename = os.path.split(path)
 471            parent_fid = get_parent(dirname, basename)
 472
 473            executable = False
 474            if mode == '100755':
 475                executable = True
 476            elif mode == '120000':
 477                kind = 'symlink'
 478
 479            change = (fid,
 480                    (None, path),
 481                    True,
 482                    (False, True),
 483                    (None, parent_fid),
 484                    (None, basename),
 485                    (None, kind),
 486                    (None, executable))
 487            self.files[path] = [change[0], None]
 488            changes.append(change)
 489
 490        def update_entry(fid, path, kind, mode = None):
 491            dirname, basename = os.path.split(path)
 492            parent_fid = get_parent(dirname, basename)
 493
 494            executable = False
 495            if mode == '100755':
 496                executable = True
 497            elif mode == '120000':
 498                kind = 'symlink'
 499
 500            change = (fid,
 501                    (path, path),
 502                    True,
 503                    (True, True),
 504                    (None, parent_fid),
 505                    (None, basename),
 506                    (None, kind),
 507                    (None, executable))
 508            self.files[path] = [change[0], None]
 509            changes.append(change)
 510
 511        def remove_entry(fid, path, kind):
 512            dirname, basename = os.path.split(path)
 513            parent_fid = get_parent(dirname, basename)
 514            change = (fid,
 515                    (path, None),
 516                    True,
 517                    (True, False),
 518                    (parent_fid, None),
 519                    (None, None),
 520                    (None, None),
 521                    (None, None))
 522            del self.files[path]
 523            changes.append(change)
 524
 525        for fid, f in self.updates.iteritems():
 526            path = f['path']
 527
 528            if 'deleted' in f:
 529                remove_entry(fid, path, 'file')
 530                continue
 531
 532            if path in self.base_files:
 533                update_entry(fid, path, 'file', f['mode'])
 534            else:
 535                add_entry(fid, path, 'file', f['mode'])
 536
 537            self.files[path][1] = f['mark']
 538            self.rev_files[fid][1] = f['mark']
 539
 540        return changes
 541
 542    def get_content(self, file_id):
 543        path, mark = self.rev_files[file_id]
 544        if mark:
 545            return blob_marks[mark]
 546
 547        # last resort
 548        tree = self.branch.repository.revision_tree(self.base_id)
 549        return tree.get_file_text(file_id)
 550
 551    def get_file_with_stat(self, file_id, path=None):
 552        content = self.get_content(file_id)
 553        return (StringIO.StringIO(content), None)
 554
 555    def get_symlink_target(self, file_id):
 556        return self.get_content(file_id)
 557
 558    def id2path(self, file_id):
 559        path, mark = self.rev_files[file_id]
 560        return path
 561
 562def c_style_unescape(string):
 563    if string[0] == string[-1] == '"':
 564        return string.decode('string-escape')[1:-1]
 565    return string
 566
 567def parse_commit(parser):
 568    global marks, blob_marks, parsed_refs
 569    global mode
 570
 571    parents = []
 572
 573    ref = parser[1]
 574    parser.next()
 575
 576    if ref.startswith('refs/heads/'):
 577        name = ref[len('refs/heads/'):]
 578        branch = branches[name]
 579    else:
 580        die('unknown ref')
 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        parents.append(parser.get_mark())
 592        parser.next()
 593    while parser.check('merge'):
 594        parents.append(parser.get_mark())
 595        parser.next()
 596
 597    # fast-export adds an extra newline
 598    if data[-1] == '\n':
 599        data = data[:-1]
 600
 601    files = {}
 602
 603    for line in parser:
 604        if parser.check('M'):
 605            t, m, mark_ref, path = line.split(' ', 3)
 606            mark = int(mark_ref[1:])
 607            f = { 'mode' : m, 'mark' : mark }
 608        elif parser.check('D'):
 609            t, path = line.split(' ')
 610            f = { 'deleted' : True }
 611        else:
 612            die('Unknown file command: %s' % line)
 613        path = c_style_unescape(path).decode('utf-8')
 614        files[path] = f
 615
 616    committer, date, tz = committer
 617    parents = [str(mark_to_rev(p)) for p in parents]
 618    revid = bzrlib.generate_ids.gen_revision_id(committer, date)
 619    props = {}
 620    props['branch-nick'] = branch.nick
 621
 622    mtree = CustomTree(branch, revid, parents, files)
 623    changes = mtree.iter_changes()
 624
 625    branch.lock_write()
 626    try:
 627        builder = branch.get_commit_builder(parents, None, date, tz, committer, props, revid)
 628        try:
 629            list(builder.record_iter_changes(mtree, mtree.last_revision(), changes))
 630            builder.finish_inventory()
 631            builder.commit(data.decode('utf-8', 'replace'))
 632        except Exception, e:
 633            builder.abort()
 634            raise
 635    finally:
 636        branch.unlock()
 637
 638    parsed_refs[ref] = revid
 639    marks.new_mark(revid, commit_mark)
 640
 641def parse_reset(parser):
 642    global parsed_refs
 643
 644    ref = parser[1]
 645    parser.next()
 646
 647    # ugh
 648    if parser.check('commit'):
 649        parse_commit(parser)
 650        return
 651    if not parser.check('from'):
 652        return
 653    from_mark = parser.get_mark()
 654    parser.next()
 655
 656    parsed_refs[ref] = mark_to_rev(from_mark)
 657
 658def do_export(parser):
 659    global parsed_refs, dirname
 660
 661    parser.next()
 662
 663    for line in parser.each_block('done'):
 664        if parser.check('blob'):
 665            parse_blob(parser)
 666        elif parser.check('commit'):
 667            parse_commit(parser)
 668        elif parser.check('reset'):
 669            parse_reset(parser)
 670        elif parser.check('tag'):
 671            pass
 672        elif parser.check('feature'):
 673            pass
 674        else:
 675            die('unhandled export command: %s' % line)
 676
 677    for ref, revid in parsed_refs.iteritems():
 678        name = ref[len('refs/heads/'):]
 679        branch = branches[name]
 680        branch.generate_revision_history(revid, marks.get_tip(name))
 681
 682        if name in peers:
 683            peer = peers[name]
 684            try:
 685                peer.bzrdir.push_branch(branch, revision_id=revid)
 686            except bzrlib.errors.DivergedBranches:
 687                print "error %s non-fast forward" % ref
 688                continue
 689
 690        try:
 691            wt = branch.bzrdir.open_workingtree()
 692            wt.update()
 693        except bzrlib.errors.NoWorkingTree:
 694            pass
 695
 696        print "ok %s" % ref
 697
 698    print
 699
 700def do_capabilities(parser):
 701    global dirname
 702
 703    print "import"
 704    print "export"
 705    print "refspec refs/heads/*:%s/heads/*" % prefix
 706    print "refspec refs/tags/*:%s/tags/*" % prefix
 707
 708    path = os.path.join(dirname, 'marks-git')
 709
 710    if os.path.exists(path):
 711        print "*import-marks %s" % path
 712    print "*export-marks %s" % path
 713
 714    print
 715
 716def ref_is_valid(name):
 717    return not True in [c in name for c in '~^: \\']
 718
 719def do_list(parser):
 720    global tags
 721
 722    master_branch = None
 723
 724    for name in branches:
 725        if not master_branch:
 726            master_branch = name
 727        print "? refs/heads/%s" % name
 728
 729    branch = branches[master_branch]
 730    branch.lock_read()
 731    for tag, revid in branch.tags.get_tag_dict().items():
 732        try:
 733            branch.revision_id_to_dotted_revno(revid)
 734        except bzrlib.errors.NoSuchRevision:
 735            continue
 736        if not ref_is_valid(tag):
 737            continue
 738        print "? refs/tags/%s" % tag
 739        tags[tag] = revid
 740    branch.unlock()
 741
 742    print "@refs/heads/%s HEAD" % master_branch
 743    print
 744
 745def get_remote_branch(origin, remote_branch, name):
 746    global dirname, peers
 747
 748    branch_path = os.path.join(dirname, 'clone', name)
 749    if os.path.exists(branch_path):
 750        # pull
 751        d = bzrlib.bzrdir.BzrDir.open(branch_path)
 752        branch = d.open_branch()
 753        try:
 754            branch.pull(remote_branch, [], None, False)
 755        except bzrlib.errors.DivergedBranches:
 756            # use remote branch for now
 757            return remote_branch
 758    else:
 759        # clone
 760        d = origin.sprout(branch_path, None,
 761                hardlink=True, create_tree_if_local=False,
 762                force_new_repo=False,
 763                source_branch=remote_branch)
 764        branch = d.open_branch()
 765
 766    return branch
 767
 768def find_branches(repo, wanted):
 769    transport = repo.user_transport
 770
 771    for fn in transport.iter_files_recursive():
 772        if not fn.endswith('.bzr/branch-format'):
 773            continue
 774
 775        name = subdir = fn[:-len('/.bzr/branch-format')]
 776        name = name if name != '' else 'master'
 777        name = name.replace('/', '+')
 778
 779        if wanted and not name in wanted:
 780            continue
 781
 782        try:
 783            cur = transport.clone(subdir)
 784            branch = bzrlib.branch.Branch.open_from_transport(cur)
 785        except bzrlib.errors.NotBranchError:
 786            continue
 787        else:
 788            yield name, branch
 789
 790def get_repo(url, alias):
 791    global dirname, peer, branches
 792
 793    normal_url = bzrlib.urlutils.normalize_url(url)
 794    origin = bzrlib.bzrdir.BzrDir.open(url)
 795    is_local = isinstance(origin.transport, bzrlib.transport.local.LocalTransport)
 796
 797    shared_path = os.path.join(gitdir, 'bzr')
 798    try:
 799        shared_dir = bzrlib.bzrdir.BzrDir.open(shared_path)
 800    except bzrlib.errors.NotBranchError:
 801        shared_dir = bzrlib.bzrdir.BzrDir.create(shared_path)
 802    try:
 803        shared_repo = shared_dir.open_repository()
 804    except bzrlib.errors.NoRepositoryPresent:
 805        shared_repo = shared_dir.create_repository(shared=True)
 806
 807    if not is_local:
 808        clone_path = os.path.join(dirname, 'clone')
 809        if not os.path.exists(clone_path):
 810            os.mkdir(clone_path)
 811
 812    try:
 813        repo = origin.open_repository()
 814    except bzrlib.errors.NoRepositoryPresent:
 815        # branch
 816
 817        name = 'master'
 818        branch = origin.open_branch()
 819
 820        if not is_local:
 821            peers[name] = branch
 822            branches[name] = get_remote_branch(origin, branch, name)
 823        else:
 824            branches[name] = branch
 825
 826        return branch.repository
 827    else:
 828        # repository
 829
 830        wanted = get_config('remote-bzr.branches').rstrip().split(', ')
 831        # stupid python
 832        wanted = [e for e in wanted if e]
 833
 834        for name, branch in find_branches(repo, wanted):
 835
 836            if not is_local:
 837                peers[name] = branch
 838                branches[name] = get_remote_branch(origin, branch, name)
 839            else:
 840                branches[name] = branch
 841
 842        return repo
 843
 844def fix_path(alias, orig_url):
 845    url = urlparse.urlparse(orig_url, 'file')
 846    if url.scheme != 'file' or os.path.isabs(url.path):
 847        return
 848    abs_url = urlparse.urljoin("%s/" % os.getcwd(), orig_url)
 849    cmd = ['git', 'config', 'remote.%s.url' % alias, "bzr::%s" % abs_url]
 850    subprocess.call(cmd)
 851
 852def main(args):
 853    global marks, prefix, gitdir, dirname
 854    global tags, filenodes
 855    global blob_marks
 856    global parsed_refs
 857    global files_cache
 858    global is_tmp
 859    global branches, peers
 860
 861    alias = args[1]
 862    url = args[2]
 863
 864    tags = {}
 865    filenodes = {}
 866    blob_marks = {}
 867    parsed_refs = {}
 868    files_cache = {}
 869    marks = None
 870    branches = {}
 871    peers = {}
 872
 873    if alias[5:] == url:
 874        is_tmp = True
 875        alias = hashlib.sha1(alias).hexdigest()
 876    else:
 877        is_tmp = False
 878
 879    prefix = 'refs/bzr/%s' % alias
 880    gitdir = os.environ['GIT_DIR']
 881    dirname = os.path.join(gitdir, 'bzr', alias)
 882
 883    if not is_tmp:
 884        fix_path(alias, url)
 885
 886    if not os.path.exists(dirname):
 887        os.makedirs(dirname)
 888
 889    bzrlib.ui.ui_factory.be_quiet(True)
 890
 891    repo = get_repo(url, alias)
 892
 893    marks_path = os.path.join(dirname, 'marks-int')
 894    marks = Marks(marks_path)
 895
 896    parser = Parser(repo)
 897    for line in parser:
 898        if parser.check('capabilities'):
 899            do_capabilities(parser)
 900        elif parser.check('list'):
 901            do_list(parser)
 902        elif parser.check('import'):
 903            do_import(parser)
 904        elif parser.check('export'):
 905            do_export(parser)
 906        else:
 907            die('unhandled command: %s' % line)
 908        sys.stdout.flush()
 909
 910def bye():
 911    if not marks:
 912        return
 913    if not is_tmp:
 914        marks.store()
 915    else:
 916        shutil.rmtree(dirname)
 917
 918atexit.register(bye)
 919sys.exit(main(sys.argv))