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