Andrew's git - gitweb.git/blob

2e210089bfac32512bc2435665fc4c29bea805e6
   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    tip_revno = branch.revision_id_to_revno(tip)
 286    last_revno, _ = branch.last_revision_info()
 287    total = last_revno - tip_revno
 288
 289    revs = [revid, seq for revid, _, seq, _ in revs if not marks.is_marked(revid)]
 290
 291    for revid, seq in revs:
 292
 293        rev = repo.get_revision(revid)
 294        revno = seq[0]
 295
 296        parents = rev.parent_ids
 297        time = rev.timestamp
 298        tz = rev.timezone
 299        committer = rev.committer.encode('utf-8')
 300        committer = "%s %u %s" % (fixup_user(committer), time, gittz(tz))
 301        authors = rev.get_apparent_authors()
 302        if authors:
 303            author = authors[0].encode('utf-8')
 304            author = "%s %u %s" % (fixup_user(author), time, gittz(tz))
 305        else:
 306            author = committer
 307        msg = rev.message.encode('utf-8')
 308
 309        msg += '\n'
 310
 311        if len(parents) == 0:
 312            parent = bzrlib.revision.NULL_REVISION
 313        else:
 314            parent = parents[0]
 315
 316        cur_tree = repo.revision_tree(revid)
 317        prev = repo.revision_tree(parent)
 318        modified, removed = get_filechanges(cur_tree, prev)
 319
 320        modified_final = export_files(cur_tree, modified)
 321
 322        if len(parents) == 0:
 323            print 'reset %s' % ref
 324
 325        print "commit %s" % ref
 326        print "mark :%d" % (marks.get_mark(revid))
 327        print "author %s" % (author)
 328        print "committer %s" % (committer)
 329        print "data %d" % (len(msg))
 330        print msg
 331
 332        for i, p in enumerate(parents):
 333            try:
 334                m = rev_to_mark(p)
 335            except KeyError:
 336                # ghost?
 337                continue
 338            if i == 0:
 339                print "from :%s" % m
 340            else:
 341                print "merge :%s" % m
 342
 343        for f in removed:
 344            print "D %s" % (f,)
 345        for f in modified_final:
 346            print "M %s :%u %s" % f
 347        print
 348
 349        if len(seq) > 1:
 350            # let's skip branch revisions from the progress report
 351            continue
 352
 353        progress = (revno - tip_revno)
 354        if (progress % 100 == 0):
 355            print "progress revision %d '%s' (%d/%d)" % (revno, name, progress, total)
 356
 357    branch.unlock()
 358
 359    revid = branch.last_revision()
 360
 361    # make sure the ref is updated
 362    print "reset %s" % ref
 363    print "from :%u" % rev_to_mark(revid)
 364    print
 365
 366    marks.set_tip(name, revid)
 367
 368def export_tag(repo, name):
 369    global tags, prefix
 370
 371    ref = '%s/tags/%s' % (prefix, name)
 372    print "reset %s" % ref
 373    print "from :%u" % rev_to_mark(tags[name])
 374    print
 375
 376def do_import(parser):
 377    global dirname
 378
 379    repo = parser.repo
 380    path = os.path.join(dirname, 'marks-git')
 381
 382    print "feature done"
 383    if os.path.exists(path):
 384        print "feature import-marks=%s" % path
 385    print "feature export-marks=%s" % path
 386    print "feature force"
 387    sys.stdout.flush()
 388
 389    while parser.check('import'):
 390        ref = parser[1]
 391        if ref.startswith('refs/heads/'):
 392            name = ref[len('refs/heads/'):]
 393            export_branch(repo, name)
 394        if ref.startswith('refs/tags/'):
 395            name = ref[len('refs/tags/'):]
 396            export_tag(repo, name)
 397        parser.next()
 398
 399    print 'done'
 400
 401    sys.stdout.flush()
 402
 403def parse_blob(parser):
 404    global blob_marks
 405
 406    parser.next()
 407    mark = parser.get_mark()
 408    parser.next()
 409    data = parser.get_data()
 410    blob_marks[mark] = data
 411    parser.next()
 412
 413class CustomTree():
 414
 415    def __init__(self, branch, revid, parents, files):
 416        global files_cache
 417
 418        self.updates = {}
 419        self.branch = branch
 420
 421        def copy_tree(revid):
 422            files = files_cache[revid] = {}
 423            branch.lock_read()
 424            tree = branch.repository.revision_tree(revid)
 425            try:
 426                for path, entry in tree.iter_entries_by_dir():
 427                    files[path] = [entry.file_id, None]
 428            finally:
 429                branch.unlock()
 430            return files
 431
 432        if len(parents) == 0:
 433            self.base_id = bzrlib.revision.NULL_REVISION
 434            self.base_files = {}
 435        else:
 436            self.base_id = parents[0]
 437            self.base_files = files_cache.get(self.base_id, None)
 438            if not self.base_files:
 439                self.base_files = copy_tree(self.base_id)
 440
 441        self.files = files_cache[revid] = self.base_files.copy()
 442        self.rev_files = {}
 443
 444        for path, data in self.files.iteritems():
 445            fid, mark = data
 446            self.rev_files[fid] = [path, mark]
 447
 448        for path, f in files.iteritems():
 449            fid, mark = self.files.get(path, [None, None])
 450            if not fid:
 451                fid = bzrlib.generate_ids.gen_file_id(path)
 452            f['path'] = path
 453            self.rev_files[fid] = [path, mark]
 454            self.updates[fid] = f
 455
 456    def last_revision(self):
 457        return self.base_id
 458
 459    def iter_changes(self):
 460        changes = []
 461
 462        def get_parent(dirname, basename):
 463            parent_fid, mark = self.base_files.get(dirname, [None, None])
 464            if parent_fid:
 465                return parent_fid
 466            parent_fid, mark = self.files.get(dirname, [None, None])
 467            if parent_fid:
 468                return parent_fid
 469            if basename == '':
 470                return None
 471            fid = bzrlib.generate_ids.gen_file_id(path)
 472            add_entry(fid, dirname, 'directory')
 473            return fid
 474
 475        def add_entry(fid, path, kind, mode = None):
 476            dirname, basename = os.path.split(path)
 477            parent_fid = get_parent(dirname, basename)
 478
 479            executable = False
 480            if mode == '100755':
 481                executable = True
 482            elif mode == '120000':
 483                kind = 'symlink'
 484
 485            change = (fid,
 486                    (None, path),
 487                    True,
 488                    (False, True),
 489                    (None, parent_fid),
 490                    (None, basename),
 491                    (None, kind),
 492                    (None, executable))
 493            self.files[path] = [change[0], None]
 494            changes.append(change)
 495
 496        def update_entry(fid, path, kind, mode = None):
 497            dirname, basename = os.path.split(path)
 498            parent_fid = get_parent(dirname, basename)
 499
 500            executable = False
 501            if mode == '100755':
 502                executable = True
 503            elif mode == '120000':
 504                kind = 'symlink'
 505
 506            change = (fid,
 507                    (path, path),
 508                    True,
 509                    (True, True),
 510                    (None, parent_fid),
 511                    (None, basename),
 512                    (None, kind),
 513                    (None, executable))
 514            self.files[path] = [change[0], None]
 515            changes.append(change)
 516
 517        def remove_entry(fid, path, kind):
 518            dirname, basename = os.path.split(path)
 519            parent_fid = get_parent(dirname, basename)
 520            change = (fid,
 521                    (path, None),
 522                    True,
 523                    (True, False),
 524                    (parent_fid, None),
 525                    (None, None),
 526                    (None, None),
 527                    (None, None))
 528            del self.files[path]
 529            changes.append(change)
 530
 531        for fid, f in self.updates.iteritems():
 532            path = f['path']
 533
 534            if 'deleted' in f:
 535                remove_entry(fid, path, 'file')
 536                continue
 537
 538            if path in self.base_files:
 539                update_entry(fid, path, 'file', f['mode'])
 540            else:
 541                add_entry(fid, path, 'file', f['mode'])
 542
 543            self.files[path][1] = f['mark']
 544            self.rev_files[fid][1] = f['mark']
 545
 546        return changes
 547
 548    def get_content(self, file_id):
 549        path, mark = self.rev_files[file_id]
 550        if mark:
 551            return blob_marks[mark]
 552
 553        # last resort
 554        tree = self.branch.repository.revision_tree(self.base_id)
 555        return tree.get_file_text(file_id)
 556
 557    def get_file_with_stat(self, file_id, path=None):
 558        content = self.get_content(file_id)
 559        return (StringIO.StringIO(content), None)
 560
 561    def get_symlink_target(self, file_id):
 562        return self.get_content(file_id)
 563
 564    def id2path(self, file_id):
 565        path, mark = self.rev_files[file_id]
 566        return path
 567
 568def c_style_unescape(string):
 569    if string[0] == string[-1] == '"':
 570        return string.decode('string-escape')[1:-1]
 571    return string
 572
 573def parse_commit(parser):
 574    global marks, blob_marks, parsed_refs
 575    global mode
 576
 577    parents = []
 578
 579    ref = parser[1]
 580    parser.next()
 581
 582    if ref.startswith('refs/heads/'):
 583        name = ref[len('refs/heads/'):]
 584        branch = branches[name]
 585    else:
 586        die('unknown ref')
 587
 588    commit_mark = parser.get_mark()
 589    parser.next()
 590    author = parser.get_author()
 591    parser.next()
 592    committer = parser.get_author()
 593    parser.next()
 594    data = parser.get_data()
 595    parser.next()
 596    if parser.check('from'):
 597        parents.append(parser.get_mark())
 598        parser.next()
 599    while parser.check('merge'):
 600        parents.append(parser.get_mark())
 601        parser.next()
 602
 603    # fast-export adds an extra newline
 604    if data[-1] == '\n':
 605        data = data[:-1]
 606
 607    files = {}
 608
 609    for line in parser:
 610        if parser.check('M'):
 611            t, m, mark_ref, path = line.split(' ', 3)
 612            mark = int(mark_ref[1:])
 613            f = { 'mode' : m, 'mark' : mark }
 614        elif parser.check('D'):
 615            t, path = line.split(' ')
 616            f = { 'deleted' : True }
 617        else:
 618            die('Unknown file command: %s' % line)
 619        path = c_style_unescape(path).decode('utf-8')
 620        files[path] = f
 621
 622    committer, date, tz = committer
 623    parents = [str(mark_to_rev(p)) for p in parents]
 624    revid = bzrlib.generate_ids.gen_revision_id(committer, date)
 625    props = {}
 626    props['branch-nick'] = branch.nick
 627
 628    mtree = CustomTree(branch, revid, parents, files)
 629    changes = mtree.iter_changes()
 630
 631    branch.lock_write()
 632    try:
 633        builder = branch.get_commit_builder(parents, None, date, tz, committer, props, revid)
 634        try:
 635            list(builder.record_iter_changes(mtree, mtree.last_revision(), changes))
 636            builder.finish_inventory()
 637            builder.commit(data.decode('utf-8', 'replace'))
 638        except Exception, e:
 639            builder.abort()
 640            raise
 641    finally:
 642        branch.unlock()
 643
 644    parsed_refs[ref] = revid
 645    marks.new_mark(revid, commit_mark)
 646
 647def parse_reset(parser):
 648    global parsed_refs
 649
 650    ref = parser[1]
 651    parser.next()
 652
 653    # ugh
 654    if parser.check('commit'):
 655        parse_commit(parser)
 656        return
 657    if not parser.check('from'):
 658        return
 659    from_mark = parser.get_mark()
 660    parser.next()
 661
 662    parsed_refs[ref] = mark_to_rev(from_mark)
 663
 664def do_export(parser):
 665    global parsed_refs, dirname
 666
 667    parser.next()
 668
 669    for line in parser.each_block('done'):
 670        if parser.check('blob'):
 671            parse_blob(parser)
 672        elif parser.check('commit'):
 673            parse_commit(parser)
 674        elif parser.check('reset'):
 675            parse_reset(parser)
 676        elif parser.check('tag'):
 677            pass
 678        elif parser.check('feature'):
 679            pass
 680        else:
 681            die('unhandled export command: %s' % line)
 682
 683    for ref, revid in parsed_refs.iteritems():
 684        name = ref[len('refs/heads/'):]
 685        branch = branches[name]
 686        branch.generate_revision_history(revid, marks.get_tip(name))
 687
 688        if name in peers:
 689            peer = peers[name]
 690            try:
 691                peer.bzrdir.push_branch(branch, revision_id=revid)
 692            except bzrlib.errors.DivergedBranches:
 693                print "error %s non-fast forward" % ref
 694                continue
 695
 696        try:
 697            wt = branch.bzrdir.open_workingtree()
 698            wt.update()
 699        except bzrlib.errors.NoWorkingTree:
 700            pass
 701
 702        print "ok %s" % ref
 703
 704    print
 705
 706def do_capabilities(parser):
 707    global dirname
 708
 709    print "import"
 710    print "export"
 711    print "refspec refs/heads/*:%s/heads/*" % prefix
 712    print "refspec refs/tags/*:%s/tags/*" % prefix
 713
 714    path = os.path.join(dirname, 'marks-git')
 715
 716    if os.path.exists(path):
 717        print "*import-marks %s" % path
 718    print "*export-marks %s" % path
 719
 720    print
 721
 722def ref_is_valid(name):
 723    return not True in [c in name for c in '~^: \\']
 724
 725def do_list(parser):
 726    global tags
 727
 728    master_branch = None
 729
 730    for name in branches:
 731        if not master_branch:
 732            master_branch = name
 733        print "? refs/heads/%s" % name
 734
 735    branch = branches[master_branch]
 736    branch.lock_read()
 737    for tag, revid in branch.tags.get_tag_dict().items():
 738        try:
 739            branch.revision_id_to_dotted_revno(revid)
 740        except bzrlib.errors.NoSuchRevision:
 741            continue
 742        if not ref_is_valid(tag):
 743            continue
 744        print "? refs/tags/%s" % tag
 745        tags[tag] = revid
 746    branch.unlock()
 747
 748    print "@refs/heads/%s HEAD" % master_branch
 749    print
 750
 751def get_remote_branch(origin, remote_branch, name):
 752    global dirname, peers
 753
 754    branch_path = os.path.join(dirname, 'clone', name)
 755    if os.path.exists(branch_path):
 756        # pull
 757        d = bzrlib.bzrdir.BzrDir.open(branch_path)
 758        branch = d.open_branch()
 759        try:
 760            branch.pull(remote_branch, [], None, False)
 761        except bzrlib.errors.DivergedBranches:
 762            # use remote branch for now
 763            return remote_branch
 764    else:
 765        # clone
 766        d = origin.sprout(branch_path, None,
 767                hardlink=True, create_tree_if_local=False,
 768                force_new_repo=False,
 769                source_branch=remote_branch)
 770        branch = d.open_branch()
 771
 772    return branch
 773
 774def find_branches(repo, wanted):
 775    transport = repo.user_transport
 776
 777    for fn in transport.iter_files_recursive():
 778        if not fn.endswith('.bzr/branch-format'):
 779            continue
 780
 781        name = subdir = fn[:-len('/.bzr/branch-format')]
 782        name = name if name != '' else 'master'
 783        name = name.replace('/', '+')
 784
 785        if wanted and not name in wanted:
 786            continue
 787
 788        try:
 789            cur = transport.clone(subdir)
 790            branch = bzrlib.branch.Branch.open_from_transport(cur)
 791        except bzrlib.errors.NotBranchError:
 792            continue
 793        else:
 794            yield name, branch
 795
 796def get_repo(url, alias):
 797    global dirname, peer, branches
 798
 799    normal_url = bzrlib.urlutils.normalize_url(url)
 800    origin = bzrlib.bzrdir.BzrDir.open(url)
 801    is_local = isinstance(origin.transport, bzrlib.transport.local.LocalTransport)
 802
 803    shared_path = os.path.join(gitdir, 'bzr')
 804    try:
 805        shared_dir = bzrlib.bzrdir.BzrDir.open(shared_path)
 806    except bzrlib.errors.NotBranchError:
 807        shared_dir = bzrlib.bzrdir.BzrDir.create(shared_path)
 808    try:
 809        shared_repo = shared_dir.open_repository()
 810    except bzrlib.errors.NoRepositoryPresent:
 811        shared_repo = shared_dir.create_repository(shared=True)
 812
 813    if not is_local:
 814        clone_path = os.path.join(dirname, 'clone')
 815        if not os.path.exists(clone_path):
 816            os.mkdir(clone_path)
 817
 818    try:
 819        repo = origin.open_repository()
 820    except bzrlib.errors.NoRepositoryPresent:
 821        # branch
 822
 823        name = 'master'
 824        branch = origin.open_branch()
 825
 826        if not is_local:
 827            peers[name] = branch
 828            branches[name] = get_remote_branch(origin, branch, name)
 829        else:
 830            branches[name] = branch
 831
 832        return branch.repository
 833    else:
 834        # repository
 835
 836        wanted = get_config('remote-bzr.branches').rstrip().split(', ')
 837        # stupid python
 838        wanted = [e for e in wanted if e]
 839
 840        for name, branch in find_branches(repo, wanted):
 841
 842            if not is_local:
 843                peers[name] = branch
 844                branches[name] = get_remote_branch(origin, branch, name)
 845            else:
 846                branches[name] = branch
 847
 848        return repo
 849
 850def fix_path(alias, orig_url):
 851    url = urlparse.urlparse(orig_url, 'file')
 852    if url.scheme != 'file' or os.path.isabs(url.path):
 853        return
 854    abs_url = urlparse.urljoin("%s/" % os.getcwd(), orig_url)
 855    cmd = ['git', 'config', 'remote.%s.url' % alias, "bzr::%s" % abs_url]
 856    subprocess.call(cmd)
 857
 858def main(args):
 859    global marks, prefix, gitdir, dirname
 860    global tags, filenodes
 861    global blob_marks
 862    global parsed_refs
 863    global files_cache
 864    global is_tmp
 865    global branches, peers
 866
 867    alias = args[1]
 868    url = args[2]
 869
 870    tags = {}
 871    filenodes = {}
 872    blob_marks = {}
 873    parsed_refs = {}
 874    files_cache = {}
 875    marks = None
 876    branches = {}
 877    peers = {}
 878
 879    if alias[5:] == url:
 880        is_tmp = True
 881        alias = hashlib.sha1(alias).hexdigest()
 882    else:
 883        is_tmp = False
 884
 885    prefix = 'refs/bzr/%s' % alias
 886    gitdir = os.environ['GIT_DIR']
 887    dirname = os.path.join(gitdir, 'bzr', alias)
 888
 889    if not is_tmp:
 890        fix_path(alias, url)
 891
 892    if not os.path.exists(dirname):
 893        os.makedirs(dirname)
 894
 895    bzrlib.ui.ui_factory.be_quiet(True)
 896
 897    repo = get_repo(url, alias)
 898
 899    marks_path = os.path.join(dirname, 'marks-int')
 900    marks = Marks(marks_path)
 901
 902    parser = Parser(repo)
 903    for line in parser:
 904        if parser.check('capabilities'):
 905            do_capabilities(parser)
 906        elif parser.check('list'):
 907            do_list(parser)
 908        elif parser.check('import'):
 909            do_import(parser)
 910        elif parser.check('export'):
 911            do_export(parser)
 912        else:
 913            die('unhandled command: %s' % line)
 914        sys.stdout.flush()
 915
 916def bye():
 917    if not marks:
 918        return
 919    if not is_tmp:
 920        marks.store()
 921    else:
 922        shutil.rmtree(dirname)
 923
 924atexit.register(bye)
 925sys.exit(main(sys.argv))