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 to track (per repo):
  17# % git config remote.origin.bzr-branches 'trunk, devel, test'
  18#
  19# Where 'origin' is the name of the repository you want to specify the
  20# branches.
  21#
  22
  23import sys
  24
  25import bzrlib
  26if hasattr(bzrlib, "initialize"):
  27    bzrlib.initialize()
  28
  29import bzrlib.plugin
  30bzrlib.plugin.load_plugins()
  31
  32import bzrlib.generate_ids
  33import bzrlib.transport
  34import bzrlib.errors
  35import bzrlib.ui
  36import bzrlib.urlutils
  37import bzrlib.branch
  38
  39import sys
  40import os
  41import json
  42import re
  43import StringIO
  44import atexit, shutil, hashlib, urlparse, subprocess
  45
  46NAME_RE = re.compile('^([^<>]+)')
  47AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
  48EMAIL_RE = re.compile('^([^<>]+[^ \\\t<>])?\\b(?:[ \\t<>]*?)\\b([^ \\t<>]+@[^ \\t<>]+)')
  49RAW_AUTHOR_RE = re.compile('^(\w+) (.+)? <(.*)> (\d+) ([+-]\d+)')
  50
  51def die(msg, *args):
  52    sys.stderr.write('ERROR: %s\n' % (msg % args))
  53    sys.exit(1)
  54
  55def warn(msg, *args):
  56    sys.stderr.write('WARNING: %s\n' % (msg % args))
  57
  58def gittz(tz):
  59    return '%+03d%02d' % (tz / 3600, tz % 3600 / 60)
  60
  61def get_config(config):
  62    cmd = ['git', 'config', '--get', config]
  63    process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
  64    output, _ = process.communicate()
  65    return output
  66
  67class Marks:
  68
  69    def __init__(self, path):
  70        self.path = path
  71        self.tips = {}
  72        self.marks = {}
  73        self.rev_marks = {}
  74        self.last_mark = 0
  75        self.load()
  76
  77    def load(self):
  78        if not os.path.exists(self.path):
  79            return
  80
  81        tmp = json.load(open(self.path))
  82        self.tips = tmp['tips']
  83        self.marks = tmp['marks']
  84        self.last_mark = tmp['last-mark']
  85
  86        for rev, mark in self.marks.iteritems():
  87            self.rev_marks[mark] = rev
  88
  89    def dict(self):
  90        return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark }
  91
  92    def store(self):
  93        json.dump(self.dict(), open(self.path, 'w'))
  94
  95    def __str__(self):
  96        return str(self.dict())
  97
  98    def from_rev(self, rev):
  99        return self.marks[rev]
 100
 101    def to_rev(self, mark):
 102        return str(self.rev_marks[mark])
 103
 104    def next_mark(self):
 105        self.last_mark += 1
 106        return self.last_mark
 107
 108    def get_mark(self, rev):
 109        self.last_mark += 1
 110        self.marks[rev] = self.last_mark
 111        return self.last_mark
 112
 113    def is_marked(self, rev):
 114        return rev in self.marks
 115
 116    def new_mark(self, rev, mark):
 117        self.marks[rev] = mark
 118        self.rev_marks[mark] = rev
 119        self.last_mark = mark
 120
 121    def get_tip(self, branch):
 122        try:
 123            return str(self.tips[branch])
 124        except KeyError:
 125            return None
 126
 127    def set_tip(self, branch, tip):
 128        self.tips[branch] = tip
 129
 130class Parser:
 131
 132    def __init__(self, repo):
 133        self.repo = repo
 134        self.line = self.get_line()
 135
 136    def get_line(self):
 137        return sys.stdin.readline().strip()
 138
 139    def __getitem__(self, i):
 140        return self.line.split()[i]
 141
 142    def check(self, word):
 143        return self.line.startswith(word)
 144
 145    def each_block(self, separator):
 146        while self.line != separator:
 147            yield self.line
 148            self.line = self.get_line()
 149
 150    def __iter__(self):
 151        return self.each_block('')
 152
 153    def next(self):
 154        self.line = self.get_line()
 155        if self.line == 'done':
 156            self.line = None
 157
 158    def get_mark(self):
 159        i = self.line.index(':') + 1
 160        return int(self.line[i:])
 161
 162    def get_data(self):
 163        if not self.check('data'):
 164            return None
 165        i = self.line.index(' ') + 1
 166        size = int(self.line[i:])
 167        return sys.stdin.read(size)
 168
 169    def get_author(self):
 170        m = RAW_AUTHOR_RE.match(self.line)
 171        if not m:
 172            return None
 173        _, name, email, date, tz = m.groups()
 174        name = name.decode('utf-8')
 175        committer = '%s <%s>' % (name, email)
 176        tz = int(tz)
 177        tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
 178        return (committer, int(date), tz)
 179
 180def rev_to_mark(rev):
 181    return marks.from_rev(rev)
 182
 183def mark_to_rev(mark):
 184    return marks.to_rev(mark)
 185
 186def fixup_user(user):
 187    name = mail = None
 188    user = user.replace('"', '')
 189    m = AUTHOR_RE.match(user)
 190    if m:
 191        name = m.group(1)
 192        mail = m.group(2).strip()
 193    else:
 194        m = EMAIL_RE.match(user)
 195        if m:
 196            name = m.group(1)
 197            mail = m.group(2)
 198        else:
 199            m = NAME_RE.match(user)
 200            if m:
 201                name = m.group(1).strip()
 202
 203    if not name:
 204        name = 'unknown'
 205    if not mail:
 206        mail = 'Unknown'
 207
 208    return '%s <%s>' % (name, mail)
 209
 210def get_filechanges(cur, prev):
 211    modified = {}
 212    removed = {}
 213
 214    changes = cur.changes_from(prev)
 215
 216    def u(s):
 217        return s.encode('utf-8')
 218
 219    for path, fid, kind in changes.added:
 220        modified[u(path)] = fid
 221    for path, fid, kind in changes.removed:
 222        removed[u(path)] = None
 223    for path, fid, kind, mod, _ in changes.modified:
 224        modified[u(path)] = fid
 225    for oldpath, newpath, fid, kind, mod, _ in changes.renamed:
 226        removed[u(oldpath)] = None
 227        if kind == 'directory':
 228            lst = cur.list_files(from_dir=newpath, recursive=True)
 229            for path, file_class, kind, fid, entry in lst:
 230                if kind != 'directory':
 231                    modified[u(newpath + '/' + path)] = fid
 232        else:
 233            modified[u(newpath)] = fid
 234
 235    return modified, removed
 236
 237def export_files(tree, files):
 238    final = []
 239    for path, fid in files.iteritems():
 240        kind = tree.kind(fid)
 241
 242        h = tree.get_file_sha1(fid)
 243
 244        if kind == 'symlink':
 245            d = tree.get_symlink_target(fid)
 246            mode = '120000'
 247        elif kind == 'file':
 248
 249            if tree.is_executable(fid):
 250                mode = '100755'
 251            else:
 252                mode = '100644'
 253
 254            # is the blob already exported?
 255            if h in filenodes:
 256                mark = filenodes[h]
 257                final.append((mode, mark, path))
 258                continue
 259
 260            d = tree.get_file_text(fid)
 261        elif kind == 'directory':
 262            continue
 263        else:
 264            die("Unhandled kind '%s' for path '%s'" % (kind, path))
 265
 266        mark = marks.next_mark()
 267        filenodes[h] = mark
 268
 269        print "blob"
 270        print "mark :%u" % mark
 271        print "data %d" % len(d)
 272        print d
 273
 274        final.append((mode, mark, path))
 275
 276    return final
 277
 278def export_branch(repo, name):
 279    ref = '%s/heads/%s' % (prefix, name)
 280    tip = marks.get_tip(name)
 281
 282    branch = get_remote_branch(name)
 283    repo = branch.repository
 284
 285    branch.lock_read()
 286    revs = branch.iter_merge_sorted_revisions(None, tip, 'exclude', 'forward')
 287    try:
 288        tip_revno = branch.revision_id_to_revno(tip)
 289        last_revno, _ = branch.last_revision_info()
 290        total = last_revno - tip_revno
 291    except bzrlib.errors.NoSuchRevision:
 292        tip_revno = 0
 293        total = 0
 294
 295    for revid, _, seq, _ in revs:
 296
 297        if marks.is_marked(revid):
 298            continue
 299
 300        rev = repo.get_revision(revid)
 301        revno = seq[0]
 302
 303        parents = rev.parent_ids
 304        time = rev.timestamp
 305        tz = rev.timezone
 306        committer = rev.committer.encode('utf-8')
 307        committer = "%s %u %s" % (fixup_user(committer), time, gittz(tz))
 308        authors = rev.get_apparent_authors()
 309        if authors:
 310            author = authors[0].encode('utf-8')
 311            author = "%s %u %s" % (fixup_user(author), time, gittz(tz))
 312        else:
 313            author = committer
 314        msg = rev.message.encode('utf-8')
 315
 316        msg += '\n'
 317
 318        if len(parents) == 0:
 319            parent = bzrlib.revision.NULL_REVISION
 320        else:
 321            parent = parents[0]
 322
 323        cur_tree = repo.revision_tree(revid)
 324        prev = repo.revision_tree(parent)
 325        modified, removed = get_filechanges(cur_tree, prev)
 326
 327        modified_final = export_files(cur_tree, modified)
 328
 329        if len(parents) == 0:
 330            print 'reset %s' % ref
 331
 332        print "commit %s" % ref
 333        print "mark :%d" % (marks.get_mark(revid))
 334        print "author %s" % (author)
 335        print "committer %s" % (committer)
 336        print "data %d" % (len(msg))
 337        print msg
 338
 339        for i, p in enumerate(parents):
 340            try:
 341                m = rev_to_mark(p)
 342            except KeyError:
 343                # ghost?
 344                continue
 345            if i == 0:
 346                print "from :%s" % m
 347            else:
 348                print "merge :%s" % m
 349
 350        for f in removed:
 351            print "D %s" % (f,)
 352        for f in modified_final:
 353            print "M %s :%u %s" % f
 354        print
 355
 356        if len(seq) > 1:
 357            # let's skip branch revisions from the progress report
 358            continue
 359
 360        progress = (revno - tip_revno)
 361        if (progress % 100 == 0):
 362            if total:
 363                print "progress revision %d '%s' (%d/%d)" % (revno, name, progress, total)
 364            else:
 365                print "progress revision %d '%s' (%d)" % (revno, name, progress)
 366
 367    branch.unlock()
 368
 369    revid = branch.last_revision()
 370
 371    # make sure the ref is updated
 372    print "reset %s" % ref
 373    print "from :%u" % rev_to_mark(revid)
 374    print
 375
 376    marks.set_tip(name, revid)
 377
 378def export_tag(repo, name):
 379    ref = '%s/tags/%s' % (prefix, name)
 380    print "reset %s" % ref
 381    print "from :%u" % rev_to_mark(tags[name])
 382    print
 383
 384def do_import(parser):
 385    repo = parser.repo
 386    path = os.path.join(dirname, 'marks-git')
 387
 388    print "feature done"
 389    if os.path.exists(path):
 390        print "feature import-marks=%s" % path
 391    print "feature export-marks=%s" % path
 392    print "feature force"
 393    sys.stdout.flush()
 394
 395    while parser.check('import'):
 396        ref = parser[1]
 397        if ref.startswith('refs/heads/'):
 398            name = ref[len('refs/heads/'):]
 399            export_branch(repo, name)
 400        if ref.startswith('refs/tags/'):
 401            name = ref[len('refs/tags/'):]
 402            export_tag(repo, name)
 403        parser.next()
 404
 405    print 'done'
 406
 407    sys.stdout.flush()
 408
 409def parse_blob(parser):
 410    parser.next()
 411    mark = parser.get_mark()
 412    parser.next()
 413    data = parser.get_data()
 414    blob_marks[mark] = data
 415    parser.next()
 416
 417class CustomTree():
 418
 419    def __init__(self, branch, revid, parents, files):
 420        self.updates = {}
 421        self.branch = branch
 422
 423        def copy_tree(revid):
 424            files = files_cache[revid] = {}
 425            branch.lock_read()
 426            tree = branch.repository.revision_tree(revid)
 427            try:
 428                for path, entry in tree.iter_entries_by_dir():
 429                    files[path] = [entry.file_id, None]
 430            finally:
 431                branch.unlock()
 432            return files
 433
 434        if len(parents) == 0:
 435            self.base_id = bzrlib.revision.NULL_REVISION
 436            self.base_files = {}
 437        else:
 438            self.base_id = parents[0]
 439            self.base_files = files_cache.get(self.base_id, None)
 440            if not self.base_files:
 441                self.base_files = copy_tree(self.base_id)
 442
 443        self.files = files_cache[revid] = self.base_files.copy()
 444        self.rev_files = {}
 445
 446        for path, data in self.files.iteritems():
 447            fid, mark = data
 448            self.rev_files[fid] = [path, mark]
 449
 450        for path, f in files.iteritems():
 451            fid, mark = self.files.get(path, [None, None])
 452            if not fid:
 453                fid = bzrlib.generate_ids.gen_file_id(path)
 454            f['path'] = path
 455            self.rev_files[fid] = [path, mark]
 456            self.updates[fid] = f
 457
 458    def last_revision(self):
 459        return self.base_id
 460
 461    def iter_changes(self):
 462        changes = []
 463
 464        def get_parent(dirname, basename):
 465            parent_fid, mark = self.base_files.get(dirname, [None, None])
 466            if parent_fid:
 467                return parent_fid
 468            parent_fid, mark = self.files.get(dirname, [None, None])
 469            if parent_fid:
 470                return parent_fid
 471            if basename == '':
 472                return None
 473            fid = bzrlib.generate_ids.gen_file_id(path)
 474            add_entry(fid, dirname, 'directory')
 475            return fid
 476
 477        def add_entry(fid, path, kind, mode=None):
 478            dirname, basename = os.path.split(path)
 479            parent_fid = get_parent(dirname, basename)
 480
 481            executable = False
 482            if mode == '100755':
 483                executable = True
 484            elif mode == '120000':
 485                kind = 'symlink'
 486
 487            change = (fid,
 488                    (None, path),
 489                    True,
 490                    (False, True),
 491                    (None, parent_fid),
 492                    (None, basename),
 493                    (None, kind),
 494                    (None, executable))
 495            self.files[path] = [change[0], None]
 496            changes.append(change)
 497
 498        def update_entry(fid, path, kind, mode=None):
 499            dirname, basename = os.path.split(path)
 500            parent_fid = get_parent(dirname, basename)
 501
 502            executable = False
 503            if mode == '100755':
 504                executable = True
 505            elif mode == '120000':
 506                kind = 'symlink'
 507
 508            change = (fid,
 509                    (path, path),
 510                    True,
 511                    (True, True),
 512                    (None, parent_fid),
 513                    (None, basename),
 514                    (None, kind),
 515                    (None, executable))
 516            self.files[path] = [change[0], None]
 517            changes.append(change)
 518
 519        def remove_entry(fid, path, kind):
 520            dirname, basename = os.path.split(path)
 521            parent_fid = get_parent(dirname, basename)
 522            change = (fid,
 523                    (path, None),
 524                    True,
 525                    (True, False),
 526                    (parent_fid, None),
 527                    (None, None),
 528                    (None, None),
 529                    (None, None))
 530            del self.files[path]
 531            changes.append(change)
 532
 533        for fid, f in self.updates.iteritems():
 534            path = f['path']
 535
 536            if 'deleted' in f:
 537                remove_entry(fid, path, 'file')
 538                continue
 539
 540            if path in self.base_files:
 541                update_entry(fid, path, 'file', f['mode'])
 542            else:
 543                add_entry(fid, path, 'file', f['mode'])
 544
 545            self.files[path][1] = f['mark']
 546            self.rev_files[fid][1] = f['mark']
 547
 548        return changes
 549
 550    def get_content(self, file_id):
 551        path, mark = self.rev_files[file_id]
 552        if mark:
 553            return blob_marks[mark]
 554
 555        # last resort
 556        tree = self.branch.repository.revision_tree(self.base_id)
 557        return tree.get_file_text(file_id)
 558
 559    def get_file_with_stat(self, file_id, path=None):
 560        content = self.get_content(file_id)
 561        return (StringIO.StringIO(content), None)
 562
 563    def get_symlink_target(self, file_id):
 564        return self.get_content(file_id)
 565
 566    def id2path(self, file_id):
 567        path, mark = self.rev_files[file_id]
 568        return path
 569
 570def c_style_unescape(string):
 571    if string[0] == string[-1] == '"':
 572        return string.decode('string-escape')[1:-1]
 573    return string
 574
 575def parse_commit(parser):
 576    parents = []
 577
 578    ref = parser[1]
 579    parser.next()
 580
 581    if ref.startswith('refs/heads/'):
 582        name = ref[len('refs/heads/'):]
 583        branch = get_remote_branch(name)
 584    else:
 585        die('unknown ref')
 586
 587    commit_mark = parser.get_mark()
 588    parser.next()
 589    author = parser.get_author()
 590    parser.next()
 591    committer = parser.get_author()
 592    parser.next()
 593    data = parser.get_data()
 594    parser.next()
 595    if parser.check('from'):
 596        parents.append(parser.get_mark())
 597        parser.next()
 598    while parser.check('merge'):
 599        parents.append(parser.get_mark())
 600        parser.next()
 601
 602    # fast-export adds an extra newline
 603    if data[-1] == '\n':
 604        data = data[:-1]
 605
 606    files = {}
 607
 608    for line in parser:
 609        if parser.check('M'):
 610            t, m, mark_ref, path = line.split(' ', 3)
 611            mark = int(mark_ref[1:])
 612            f = { 'mode' : m, 'mark' : mark }
 613        elif parser.check('D'):
 614            t, path = line.split(' ', 1)
 615            f = { 'deleted' : True }
 616        else:
 617            die('Unknown file command: %s' % line)
 618        path = c_style_unescape(path).decode('utf-8')
 619        files[path] = f
 620
 621    committer, date, tz = committer
 622    parents = [mark_to_rev(p) for p in parents]
 623    revid = bzrlib.generate_ids.gen_revision_id(committer, date)
 624    props = {}
 625    props['branch-nick'] = branch.nick
 626
 627    mtree = CustomTree(branch, revid, parents, files)
 628    changes = mtree.iter_changes()
 629
 630    branch.lock_write()
 631    try:
 632        builder = branch.get_commit_builder(parents, None, date, tz, committer, props, revid)
 633        try:
 634            list(builder.record_iter_changes(mtree, mtree.last_revision(), changes))
 635            builder.finish_inventory()
 636            builder.commit(data.decode('utf-8', 'replace'))
 637        except Exception, e:
 638            builder.abort()
 639            raise
 640    finally:
 641        branch.unlock()
 642
 643    parsed_refs[ref] = revid
 644    marks.new_mark(revid, commit_mark)
 645
 646def parse_reset(parser):
 647    ref = parser[1]
 648    parser.next()
 649
 650    # ugh
 651    if parser.check('commit'):
 652        parse_commit(parser)
 653        return
 654    if not parser.check('from'):
 655        return
 656    from_mark = parser.get_mark()
 657    parser.next()
 658
 659    parsed_refs[ref] = mark_to_rev(from_mark)
 660
 661def do_export(parser):
 662    parser.next()
 663
 664    for line in parser.each_block('done'):
 665        if parser.check('blob'):
 666            parse_blob(parser)
 667        elif parser.check('commit'):
 668            parse_commit(parser)
 669        elif parser.check('reset'):
 670            parse_reset(parser)
 671        elif parser.check('tag'):
 672            pass
 673        elif parser.check('feature'):
 674            pass
 675        else:
 676            die('unhandled export command: %s' % line)
 677
 678    for ref, revid in parsed_refs.iteritems():
 679        if ref.startswith('refs/heads/'):
 680            name = ref[len('refs/heads/'):]
 681            branch = get_remote_branch(name)
 682            branch.generate_revision_history(revid, marks.get_tip(name))
 683
 684            if name in peers:
 685                peer = bzrlib.branch.Branch.open(peers[name],
 686                                                 possible_transports=transports)
 687                try:
 688                    peer.bzrdir.push_branch(branch, revision_id=revid,
 689                                            overwrite=force)
 690                except bzrlib.errors.DivergedBranches:
 691                    print "error %s non-fast forward" % ref
 692                    continue
 693
 694            try:
 695                wt = branch.bzrdir.open_workingtree()
 696                wt.update()
 697            except bzrlib.errors.NoWorkingTree:
 698                pass
 699        elif ref.startswith('refs/tags/'):
 700            # TODO: implement tag push
 701            print "error %s pushing tags not supported" % ref
 702            continue
 703        else:
 704            # transport-helper/fast-export bugs
 705            continue
 706
 707        print "ok %s" % ref
 708
 709    print
 710
 711def do_capabilities(parser):
 712    print "import"
 713    print "export"
 714    print "refspec refs/heads/*:%s/heads/*" % prefix
 715    print "refspec refs/tags/*:%s/tags/*" % prefix
 716
 717    path = os.path.join(dirname, 'marks-git')
 718
 719    if os.path.exists(path):
 720        print "*import-marks %s" % path
 721    print "*export-marks %s" % path
 722
 723    print "option"
 724    print
 725
 726class InvalidOptionValue(Exception):
 727    pass
 728
 729def get_bool_option(val):
 730    if val == 'true':
 731        return True
 732    elif val == 'false':
 733        return False
 734    else:
 735        raise InvalidOptionValue()
 736
 737def do_option(parser):
 738    global force
 739    opt, val = parser[1:3]
 740    try:
 741        if opt == 'force':
 742            force = get_bool_option(val)
 743            print 'ok'
 744        else:
 745            print 'unsupported'
 746    except InvalidOptionValue:
 747        print "error '%s' is not a valid value for option '%s'" % (val, opt)
 748
 749def ref_is_valid(name):
 750    return not True in [c in name for c in '~^: \\']
 751
 752def do_list(parser):
 753    master_branch = None
 754
 755    for name in branches:
 756        if not master_branch:
 757            master_branch = name
 758        print "? refs/heads/%s" % name
 759
 760    branch = get_remote_branch(master_branch)
 761    branch.lock_read()
 762    for tag, revid in branch.tags.get_tag_dict().items():
 763        try:
 764            branch.revision_id_to_dotted_revno(revid)
 765        except bzrlib.errors.NoSuchRevision:
 766            continue
 767        if not ref_is_valid(tag):
 768            continue
 769        print "? refs/tags/%s" % tag
 770        tags[tag] = revid
 771    branch.unlock()
 772
 773    print "@refs/heads/%s HEAD" % master_branch
 774    print
 775
 776def clone(path, remote_branch):
 777    try:
 778        bdir = bzrlib.bzrdir.BzrDir.create(path, possible_transports=transports)
 779    except bzrlib.errors.AlreadyControlDirError:
 780        bdir = bzrlib.bzrdir.BzrDir.open(path, possible_transports=transports)
 781    repo = bdir.find_repository()
 782    repo.fetch(remote_branch.repository)
 783    return remote_branch.sprout(bdir, repository=repo)
 784
 785def get_remote_branch(name):
 786    remote_branch = bzrlib.branch.Branch.open(branches[name],
 787                                              possible_transports=transports)
 788    if isinstance(remote_branch.user_transport, bzrlib.transport.local.LocalTransport):
 789        return remote_branch
 790
 791    branch_path = os.path.join(dirname, 'clone', name)
 792
 793    try:
 794        branch = bzrlib.branch.Branch.open(branch_path,
 795                                           possible_transports=transports)
 796    except bzrlib.errors.NotBranchError:
 797        # clone
 798        branch = clone(branch_path, remote_branch)
 799    else:
 800        # pull
 801        try:
 802            branch.pull(remote_branch, overwrite=True)
 803        except bzrlib.errors.DivergedBranches:
 804            # use remote branch for now
 805            return remote_branch
 806
 807    return branch
 808
 809def find_branches(repo):
 810    transport = repo.bzrdir.root_transport
 811
 812    for fn in transport.iter_files_recursive():
 813        if not fn.endswith('.bzr/branch-format'):
 814            continue
 815
 816        name = subdir = fn[:-len('/.bzr/branch-format')]
 817        name = name if name != '' else 'master'
 818        name = name.replace('/', '+')
 819
 820        try:
 821            cur = transport.clone(subdir)
 822            branch = bzrlib.branch.Branch.open_from_transport(cur)
 823        except bzrlib.errors.NotBranchError:
 824            continue
 825        else:
 826            yield name, branch.base
 827
 828def get_repo(url, alias):
 829    normal_url = bzrlib.urlutils.normalize_url(url)
 830    origin = bzrlib.bzrdir.BzrDir.open(url, possible_transports=transports)
 831    is_local = isinstance(origin.transport, bzrlib.transport.local.LocalTransport)
 832
 833    shared_path = os.path.join(gitdir, 'bzr')
 834    try:
 835        shared_dir = bzrlib.bzrdir.BzrDir.open(shared_path,
 836                                               possible_transports=transports)
 837    except bzrlib.errors.NotBranchError:
 838        shared_dir = bzrlib.bzrdir.BzrDir.create(shared_path,
 839                                                 possible_transports=transports)
 840    try:
 841        shared_repo = shared_dir.open_repository()
 842    except bzrlib.errors.NoRepositoryPresent:
 843        shared_repo = shared_dir.create_repository(shared=True)
 844
 845    if not is_local:
 846        clone_path = os.path.join(dirname, 'clone')
 847        if not os.path.exists(clone_path):
 848            os.mkdir(clone_path)
 849        else:
 850            # check and remove old organization
 851            try:
 852                bdir = bzrlib.bzrdir.BzrDir.open(clone_path,
 853                                                 possible_transports=transports)
 854                bdir.destroy_repository()
 855            except bzrlib.errors.NotBranchError:
 856                pass
 857            except bzrlib.errors.NoRepositoryPresent:
 858                pass
 859
 860    wanted = get_config('remote.%s.bzr-branches' % alias).rstrip().split(', ')
 861    # stupid python
 862    wanted = [e for e in wanted if e]
 863    if not wanted:
 864        wanted = get_config('remote-bzr.branches').rstrip().split(', ')
 865        # stupid python
 866        wanted = [e for e in wanted if e]
 867
 868    if not wanted:
 869        try:
 870            repo = origin.open_repository()
 871            if not repo.user_transport.listable():
 872                # this repository is not usable for us
 873                raise bzrlib.errors.NoRepositoryPresent(repo.bzrdir)
 874        except bzrlib.errors.NoRepositoryPresent:
 875            wanted = ['master']
 876
 877    if wanted:
 878        def list_wanted(url, wanted):
 879            for name in wanted:
 880                subdir = name if name != 'master' else ''
 881                yield name, bzrlib.urlutils.join(url, subdir)
 882
 883        branch_list = list_wanted(url, wanted)
 884    else:
 885        branch_list = find_branches(repo)
 886
 887    for name, url in branch_list:
 888        if not is_local:
 889            peers[name] = url
 890        branches[name] = url
 891
 892    return origin
 893
 894def fix_path(alias, orig_url):
 895    url = urlparse.urlparse(orig_url, 'file')
 896    if url.scheme != 'file' or os.path.isabs(url.path):
 897        return
 898    abs_url = urlparse.urljoin("%s/" % os.getcwd(), orig_url)
 899    cmd = ['git', 'config', 'remote.%s.url' % alias, "bzr::%s" % abs_url]
 900    subprocess.call(cmd)
 901
 902def main(args):
 903    global marks, prefix, gitdir, dirname
 904    global tags, filenodes
 905    global blob_marks
 906    global parsed_refs
 907    global files_cache
 908    global is_tmp
 909    global branches, peers
 910    global transports
 911    global force
 912
 913    alias = args[1]
 914    url = args[2]
 915
 916    tags = {}
 917    filenodes = {}
 918    blob_marks = {}
 919    parsed_refs = {}
 920    files_cache = {}
 921    marks = None
 922    branches = {}
 923    peers = {}
 924    transports = []
 925    force = False
 926
 927    if alias[5:] == url:
 928        is_tmp = True
 929        alias = hashlib.sha1(alias).hexdigest()
 930    else:
 931        is_tmp = False
 932
 933    prefix = 'refs/bzr/%s' % alias
 934    gitdir = os.environ['GIT_DIR']
 935    dirname = os.path.join(gitdir, 'bzr', alias)
 936
 937    if not is_tmp:
 938        fix_path(alias, url)
 939
 940    if not os.path.exists(dirname):
 941        os.makedirs(dirname)
 942
 943    if hasattr(bzrlib.ui.ui_factory, 'be_quiet'):
 944        bzrlib.ui.ui_factory.be_quiet(True)
 945
 946    repo = get_repo(url, alias)
 947
 948    marks_path = os.path.join(dirname, 'marks-int')
 949    marks = Marks(marks_path)
 950
 951    parser = Parser(repo)
 952    for line in parser:
 953        if parser.check('capabilities'):
 954            do_capabilities(parser)
 955        elif parser.check('list'):
 956            do_list(parser)
 957        elif parser.check('import'):
 958            do_import(parser)
 959        elif parser.check('export'):
 960            do_export(parser)
 961        elif parser.check('option'):
 962            do_option(parser)
 963        else:
 964            die('unhandled command: %s' % line)
 965        sys.stdout.flush()
 966
 967def bye():
 968    if not marks:
 969        return
 970    if not is_tmp:
 971        marks.store()
 972    else:
 973        shutil.rmtree(dirname)
 974
 975atexit.register(bye)
 976sys.exit(main(sys.argv))