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 str(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 = bzrlib.branch.Branch.open(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    for revid, _, seq, _ in revs:
 290
 291        if marks.is_marked(revid):
 292            continue
 293
 294        rev = repo.get_revision(revid)
 295        revno = seq[0]
 296
 297        parents = rev.parent_ids
 298        time = rev.timestamp
 299        tz = rev.timezone
 300        committer = rev.committer.encode('utf-8')
 301        committer = "%s %u %s" % (fixup_user(committer), time, gittz(tz))
 302        authors = rev.get_apparent_authors()
 303        if authors:
 304            author = authors[0].encode('utf-8')
 305            author = "%s %u %s" % (fixup_user(author), time, gittz(tz))
 306        else:
 307            author = committer
 308        msg = rev.message.encode('utf-8')
 309
 310        msg += '\n'
 311
 312        if len(parents) == 0:
 313            parent = bzrlib.revision.NULL_REVISION
 314        else:
 315            parent = parents[0]
 316
 317        cur_tree = repo.revision_tree(revid)
 318        prev = repo.revision_tree(parent)
 319        modified, removed = get_filechanges(cur_tree, prev)
 320
 321        modified_final = export_files(cur_tree, modified)
 322
 323        if len(parents) == 0:
 324            print 'reset %s' % ref
 325
 326        print "commit %s" % ref
 327        print "mark :%d" % (marks.get_mark(revid))
 328        print "author %s" % (author)
 329        print "committer %s" % (committer)
 330        print "data %d" % (len(msg))
 331        print msg
 332
 333        for i, p in enumerate(parents):
 334            try:
 335                m = rev_to_mark(p)
 336            except KeyError:
 337                # ghost?
 338                continue
 339            if i == 0:
 340                print "from :%s" % m
 341            else:
 342                print "merge :%s" % m
 343
 344        for f in removed:
 345            print "D %s" % (f,)
 346        for f in modified_final:
 347            print "M %s :%u %s" % f
 348        print
 349
 350        if len(seq) > 1:
 351            # let's skip branch revisions from the progress report
 352            continue
 353
 354        progress = (revno - tip_revno)
 355        if (progress % 100 == 0):
 356            print "progress revision %d '%s' (%d/%d)" % (revno, name, progress, total)
 357
 358    branch.unlock()
 359
 360    revid = branch.last_revision()
 361
 362    # make sure the ref is updated
 363    print "reset %s" % ref
 364    print "from :%u" % rev_to_mark(revid)
 365    print
 366
 367    marks.set_tip(name, revid)
 368
 369def export_tag(repo, name):
 370    global tags, prefix
 371
 372    ref = '%s/tags/%s' % (prefix, name)
 373    print "reset %s" % ref
 374    print "from :%u" % rev_to_mark(tags[name])
 375    print
 376
 377def do_import(parser):
 378    global dirname
 379
 380    repo = parser.repo
 381    path = os.path.join(dirname, 'marks-git')
 382
 383    print "feature done"
 384    if os.path.exists(path):
 385        print "feature import-marks=%s" % path
 386    print "feature export-marks=%s" % path
 387    print "feature force"
 388    sys.stdout.flush()
 389
 390    while parser.check('import'):
 391        ref = parser[1]
 392        if ref.startswith('refs/heads/'):
 393            name = ref[len('refs/heads/'):]
 394            export_branch(repo, name)
 395        if ref.startswith('refs/tags/'):
 396            name = ref[len('refs/tags/'):]
 397            export_tag(repo, name)
 398        parser.next()
 399
 400    print 'done'
 401
 402    sys.stdout.flush()
 403
 404def parse_blob(parser):
 405    global blob_marks
 406
 407    parser.next()
 408    mark = parser.get_mark()
 409    parser.next()
 410    data = parser.get_data()
 411    blob_marks[mark] = data
 412    parser.next()
 413
 414class CustomTree():
 415
 416    def __init__(self, branch, revid, parents, files):
 417        global files_cache
 418
 419        self.updates = {}
 420        self.branch = branch
 421
 422        def copy_tree(revid):
 423            files = files_cache[revid] = {}
 424            branch.lock_read()
 425            tree = branch.repository.revision_tree(revid)
 426            try:
 427                for path, entry in tree.iter_entries_by_dir():
 428                    files[path] = [entry.file_id, None]
 429            finally:
 430                branch.unlock()
 431            return files
 432
 433        if len(parents) == 0:
 434            self.base_id = bzrlib.revision.NULL_REVISION
 435            self.base_files = {}
 436        else:
 437            self.base_id = parents[0]
 438            self.base_files = files_cache.get(self.base_id, None)
 439            if not self.base_files:
 440                self.base_files = copy_tree(self.base_id)
 441
 442        self.files = files_cache[revid] = self.base_files.copy()
 443        self.rev_files = {}
 444
 445        for path, data in self.files.iteritems():
 446            fid, mark = data
 447            self.rev_files[fid] = [path, mark]
 448
 449        for path, f in files.iteritems():
 450            fid, mark = self.files.get(path, [None, None])
 451            if not fid:
 452                fid = bzrlib.generate_ids.gen_file_id(path)
 453            f['path'] = path
 454            self.rev_files[fid] = [path, mark]
 455            self.updates[fid] = f
 456
 457    def last_revision(self):
 458        return self.base_id
 459
 460    def iter_changes(self):
 461        changes = []
 462
 463        def get_parent(dirname, basename):
 464            parent_fid, mark = self.base_files.get(dirname, [None, None])
 465            if parent_fid:
 466                return parent_fid
 467            parent_fid, mark = self.files.get(dirname, [None, None])
 468            if parent_fid:
 469                return parent_fid
 470            if basename == '':
 471                return None
 472            fid = bzrlib.generate_ids.gen_file_id(path)
 473            add_entry(fid, dirname, 'directory')
 474            return fid
 475
 476        def add_entry(fid, path, kind, mode = None):
 477            dirname, basename = os.path.split(path)
 478            parent_fid = get_parent(dirname, basename)
 479
 480            executable = False
 481            if mode == '100755':
 482                executable = True
 483            elif mode == '120000':
 484                kind = 'symlink'
 485
 486            change = (fid,
 487                    (None, path),
 488                    True,
 489                    (False, True),
 490                    (None, parent_fid),
 491                    (None, basename),
 492                    (None, kind),
 493                    (None, executable))
 494            self.files[path] = [change[0], None]
 495            changes.append(change)
 496
 497        def update_entry(fid, path, kind, mode = None):
 498            dirname, basename = os.path.split(path)
 499            parent_fid = get_parent(dirname, basename)
 500
 501            executable = False
 502            if mode == '100755':
 503                executable = True
 504            elif mode == '120000':
 505                kind = 'symlink'
 506
 507            change = (fid,
 508                    (path, path),
 509                    True,
 510                    (True, True),
 511                    (None, parent_fid),
 512                    (None, basename),
 513                    (None, kind),
 514                    (None, executable))
 515            self.files[path] = [change[0], None]
 516            changes.append(change)
 517
 518        def remove_entry(fid, path, kind):
 519            dirname, basename = os.path.split(path)
 520            parent_fid = get_parent(dirname, basename)
 521            change = (fid,
 522                    (path, None),
 523                    True,
 524                    (True, False),
 525                    (parent_fid, None),
 526                    (None, None),
 527                    (None, None),
 528                    (None, None))
 529            del self.files[path]
 530            changes.append(change)
 531
 532        for fid, f in self.updates.iteritems():
 533            path = f['path']
 534
 535            if 'deleted' in f:
 536                remove_entry(fid, path, 'file')
 537                continue
 538
 539            if path in self.base_files:
 540                update_entry(fid, path, 'file', f['mode'])
 541            else:
 542                add_entry(fid, path, 'file', f['mode'])
 543
 544            self.files[path][1] = f['mark']
 545            self.rev_files[fid][1] = f['mark']
 546
 547        return changes
 548
 549    def get_content(self, file_id):
 550        path, mark = self.rev_files[file_id]
 551        if mark:
 552            return blob_marks[mark]
 553
 554        # last resort
 555        tree = self.branch.repository.revision_tree(self.base_id)
 556        return tree.get_file_text(file_id)
 557
 558    def get_file_with_stat(self, file_id, path=None):
 559        content = self.get_content(file_id)
 560        return (StringIO.StringIO(content), None)
 561
 562    def get_symlink_target(self, file_id):
 563        return self.get_content(file_id)
 564
 565    def id2path(self, file_id):
 566        path, mark = self.rev_files[file_id]
 567        return path
 568
 569def c_style_unescape(string):
 570    if string[0] == string[-1] == '"':
 571        return string.decode('string-escape')[1:-1]
 572    return string
 573
 574def parse_commit(parser):
 575    global marks, blob_marks, parsed_refs
 576    global mode
 577
 578    parents = []
 579
 580    ref = parser[1]
 581    parser.next()
 582
 583    if ref.startswith('refs/heads/'):
 584        name = ref[len('refs/heads/'):]
 585        branch = bzrlib.branch.Branch.open(branches[name])
 586    else:
 587        die('unknown ref')
 588
 589    commit_mark = parser.get_mark()
 590    parser.next()
 591    author = parser.get_author()
 592    parser.next()
 593    committer = parser.get_author()
 594    parser.next()
 595    data = parser.get_data()
 596    parser.next()
 597    if parser.check('from'):
 598        parents.append(parser.get_mark())
 599        parser.next()
 600    while parser.check('merge'):
 601        parents.append(parser.get_mark())
 602        parser.next()
 603
 604    # fast-export adds an extra newline
 605    if data[-1] == '\n':
 606        data = data[:-1]
 607
 608    files = {}
 609
 610    for line in parser:
 611        if parser.check('M'):
 612            t, m, mark_ref, path = line.split(' ', 3)
 613            mark = int(mark_ref[1:])
 614            f = { 'mode' : m, 'mark' : mark }
 615        elif parser.check('D'):
 616            t, path = line.split(' ')
 617            f = { 'deleted' : True }
 618        else:
 619            die('Unknown file command: %s' % line)
 620        path = c_style_unescape(path).decode('utf-8')
 621        files[path] = f
 622
 623    committer, date, tz = committer
 624    parents = [mark_to_rev(p) for p in parents]
 625    revid = bzrlib.generate_ids.gen_revision_id(committer, date)
 626    props = {}
 627    props['branch-nick'] = branch.nick
 628
 629    mtree = CustomTree(branch, revid, parents, files)
 630    changes = mtree.iter_changes()
 631
 632    branch.lock_write()
 633    try:
 634        builder = branch.get_commit_builder(parents, None, date, tz, committer, props, revid)
 635        try:
 636            list(builder.record_iter_changes(mtree, mtree.last_revision(), changes))
 637            builder.finish_inventory()
 638            builder.commit(data.decode('utf-8', 'replace'))
 639        except Exception, e:
 640            builder.abort()
 641            raise
 642    finally:
 643        branch.unlock()
 644
 645    parsed_refs[ref] = revid
 646    marks.new_mark(revid, commit_mark)
 647
 648def parse_reset(parser):
 649    global parsed_refs
 650
 651    ref = parser[1]
 652    parser.next()
 653
 654    # ugh
 655    if parser.check('commit'):
 656        parse_commit(parser)
 657        return
 658    if not parser.check('from'):
 659        return
 660    from_mark = parser.get_mark()
 661    parser.next()
 662
 663    parsed_refs[ref] = mark_to_rev(from_mark)
 664
 665def do_export(parser):
 666    global parsed_refs, dirname
 667
 668    parser.next()
 669
 670    for line in parser.each_block('done'):
 671        if parser.check('blob'):
 672            parse_blob(parser)
 673        elif parser.check('commit'):
 674            parse_commit(parser)
 675        elif parser.check('reset'):
 676            parse_reset(parser)
 677        elif parser.check('tag'):
 678            pass
 679        elif parser.check('feature'):
 680            pass
 681        else:
 682            die('unhandled export command: %s' % line)
 683
 684    for ref, revid in parsed_refs.iteritems():
 685        if ref.startswith('refs/heads/'):
 686            name = ref[len('refs/heads/'):]
 687            branch = bzrlib.branch.Branch.open(branches[name])
 688            branch.generate_revision_history(revid, marks.get_tip(name))
 689
 690            if name in peers:
 691                peer = bzrlib.branch.Branch.open(peers[name])
 692                try:
 693                    peer.bzrdir.push_branch(branch, revision_id=revid)
 694                except bzrlib.errors.DivergedBranches:
 695                    print "error %s non-fast forward" % ref
 696                    continue
 697
 698            try:
 699                wt = branch.bzrdir.open_workingtree()
 700                wt.update()
 701            except bzrlib.errors.NoWorkingTree:
 702                pass
 703        elif ref.startswith('refs/tags/'):
 704            # TODO: implement tag push
 705            print "error %s pushing tags not supported" % ref
 706            continue
 707        else:
 708            # transport-helper/fast-export bugs
 709            continue
 710
 711        print "ok %s" % ref
 712
 713    print
 714
 715def do_capabilities(parser):
 716    global dirname
 717
 718    print "import"
 719    print "export"
 720    print "refspec refs/heads/*:%s/heads/*" % prefix
 721    print "refspec refs/tags/*:%s/tags/*" % prefix
 722
 723    path = os.path.join(dirname, 'marks-git')
 724
 725    if os.path.exists(path):
 726        print "*import-marks %s" % path
 727    print "*export-marks %s" % path
 728
 729    print
 730
 731def ref_is_valid(name):
 732    return not True in [c in name for c in '~^: \\']
 733
 734def do_list(parser):
 735    global tags
 736
 737    master_branch = None
 738
 739    for name in branches:
 740        if not master_branch:
 741            master_branch = name
 742        print "? refs/heads/%s" % name
 743
 744    branch = bzrlib.branch.Branch.open(branches[master_branch])
 745    branch.lock_read()
 746    for tag, revid in branch.tags.get_tag_dict().items():
 747        try:
 748            branch.revision_id_to_dotted_revno(revid)
 749        except bzrlib.errors.NoSuchRevision:
 750            continue
 751        if not ref_is_valid(tag):
 752            continue
 753        print "? refs/tags/%s" % tag
 754        tags[tag] = revid
 755    branch.unlock()
 756
 757    print "@refs/heads/%s HEAD" % master_branch
 758    print
 759
 760def get_remote_branch(origin, remote_branch, name):
 761    global dirname, peers
 762
 763    branch_path = os.path.join(dirname, 'clone', name)
 764    if os.path.exists(branch_path):
 765        # pull
 766        d = bzrlib.bzrdir.BzrDir.open(branch_path)
 767        branch = d.open_branch()
 768        try:
 769            branch.pull(remote_branch, [], None, False)
 770        except bzrlib.errors.DivergedBranches:
 771            # use remote branch for now
 772            return remote_branch
 773    else:
 774        # clone
 775        d = origin.sprout(branch_path, None,
 776                hardlink=True, create_tree_if_local=False,
 777                force_new_repo=False,
 778                source_branch=remote_branch)
 779        branch = d.open_branch()
 780
 781    return branch
 782
 783def find_branches(repo, wanted):
 784    transport = repo.user_transport
 785
 786    for fn in transport.iter_files_recursive():
 787        if not fn.endswith('.bzr/branch-format'):
 788            continue
 789
 790        name = subdir = fn[:-len('/.bzr/branch-format')]
 791        name = name if name != '' else 'master'
 792        name = name.replace('/', '+')
 793
 794        if wanted and not name in wanted:
 795            continue
 796
 797        try:
 798            cur = transport.clone(subdir)
 799            branch = bzrlib.branch.Branch.open_from_transport(cur)
 800        except bzrlib.errors.NotBranchError:
 801            continue
 802        else:
 803            yield name, branch
 804
 805def get_repo(url, alias):
 806    global dirname, peer, branches
 807
 808    normal_url = bzrlib.urlutils.normalize_url(url)
 809    origin = bzrlib.bzrdir.BzrDir.open(url)
 810    is_local = isinstance(origin.transport, bzrlib.transport.local.LocalTransport)
 811
 812    shared_path = os.path.join(gitdir, 'bzr')
 813    try:
 814        shared_dir = bzrlib.bzrdir.BzrDir.open(shared_path)
 815    except bzrlib.errors.NotBranchError:
 816        shared_dir = bzrlib.bzrdir.BzrDir.create(shared_path)
 817    try:
 818        shared_repo = shared_dir.open_repository()
 819    except bzrlib.errors.NoRepositoryPresent:
 820        shared_repo = shared_dir.create_repository(shared=True)
 821
 822    if not is_local:
 823        clone_path = os.path.join(dirname, 'clone')
 824        if not os.path.exists(clone_path):
 825            os.mkdir(clone_path)
 826
 827    try:
 828        repo = origin.open_repository()
 829    except bzrlib.errors.NoRepositoryPresent:
 830        # branch
 831
 832        name = 'master'
 833        remote_branch = origin.open_branch()
 834
 835        if not is_local:
 836            peers[name] = remote_branch.base
 837            branch = get_remote_branch(origin, remote_branch, name)
 838        else:
 839            branch = remote_branch
 840
 841        branches[name] = branch.base
 842
 843        return branch.repository
 844    else:
 845        # repository
 846
 847        wanted = get_config('remote-bzr.branches').rstrip().split(', ')
 848        # stupid python
 849        wanted = [e for e in wanted if e]
 850
 851        for name, remote_branch in find_branches(repo, wanted):
 852
 853            if not is_local:
 854                peers[name] = remote_branch.base
 855                branch = get_remote_branch(origin, remote_branch, name)
 856            else:
 857                branch = remote_branch
 858
 859            branches[name] = branch.base
 860
 861        return repo
 862
 863def fix_path(alias, orig_url):
 864    url = urlparse.urlparse(orig_url, 'file')
 865    if url.scheme != 'file' or os.path.isabs(url.path):
 866        return
 867    abs_url = urlparse.urljoin("%s/" % os.getcwd(), orig_url)
 868    cmd = ['git', 'config', 'remote.%s.url' % alias, "bzr::%s" % abs_url]
 869    subprocess.call(cmd)
 870
 871def main(args):
 872    global marks, prefix, gitdir, dirname
 873    global tags, filenodes
 874    global blob_marks
 875    global parsed_refs
 876    global files_cache
 877    global is_tmp
 878    global branches, peers
 879
 880    alias = args[1]
 881    url = args[2]
 882
 883    tags = {}
 884    filenodes = {}
 885    blob_marks = {}
 886    parsed_refs = {}
 887    files_cache = {}
 888    marks = None
 889    branches = {}
 890    peers = {}
 891
 892    if alias[5:] == url:
 893        is_tmp = True
 894        alias = hashlib.sha1(alias).hexdigest()
 895    else:
 896        is_tmp = False
 897
 898    prefix = 'refs/bzr/%s' % alias
 899    gitdir = os.environ['GIT_DIR']
 900    dirname = os.path.join(gitdir, 'bzr', alias)
 901
 902    if not is_tmp:
 903        fix_path(alias, url)
 904
 905    if not os.path.exists(dirname):
 906        os.makedirs(dirname)
 907
 908    bzrlib.ui.ui_factory.be_quiet(True)
 909
 910    repo = get_repo(url, alias)
 911
 912    marks_path = os.path.join(dirname, 'marks-int')
 913    marks = Marks(marks_path)
 914
 915    parser = Parser(repo)
 916    for line in parser:
 917        if parser.check('capabilities'):
 918            do_capabilities(parser)
 919        elif parser.check('list'):
 920            do_list(parser)
 921        elif parser.check('import'):
 922            do_import(parser)
 923        elif parser.check('export'):
 924            do_export(parser)
 925        else:
 926            die('unhandled command: %s' % line)
 927        sys.stdout.flush()
 928
 929def bye():
 930    if not marks:
 931        return
 932    if not is_tmp:
 933        marks.store()
 934    else:
 935        shutil.rmtree(dirname)
 936
 937atexit.register(bye)
 938sys.exit(main(sys.argv))