7 files changed, 2584 insertions, 0 deletions

diff --git a/contrib/remote-helpers/Makefile b/contrib/remote-helpers/Makefile
new file mode 100644
index 0000000000..9a76575f78
--- /dev/null
+++ b/contrib/remote-helpers/Makefile
@@ -0,0 +1,13 @@
+TESTS := $(wildcard test*.sh)
+
+export T := $(addprefix $(CURDIR)/,$(TESTS))
+export MAKE := $(MAKE) -e
+export PATH := $(CURDIR):$(PATH)
+
+test:
+	$(MAKE) -C ../../t $@
+
+$(TESTS):
+	$(MAKE) -C ../../t $(CURDIR)/$@
+
+.PHONY: $(TESTS)
diff --git a/contrib/remote-helpers/git-remote-bzr b/contrib/remote-helpers/git-remote-bzr
new file mode 100755
index 0000000000..c5822e4ac9
--- /dev/null
+++ b/contrib/remote-helpers/git-remote-bzr
@@ -0,0 +1,725 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+
+#
+# Just copy to your ~/bin, or anywhere in your $PATH.
+# Then you can clone with:
+# % git clone bzr::/path/to/bzr/repo/or/url
+#
+# For example:
+# % git clone bzr::$HOME/myrepo
+# or
+# % git clone bzr::lp:myrepo
+#
+
+import sys
+
+import bzrlib
+if hasattr(bzrlib, "initialize"):
+    bzrlib.initialize()
+
+import bzrlib.plugin
+bzrlib.plugin.load_plugins()
+
+import bzrlib.generate_ids
+import bzrlib.transport
+
+import sys
+import os
+import json
+import re
+import StringIO
+
+NAME_RE = re.compile('^([^<>]+)')
+AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
+RAW_AUTHOR_RE = re.compile('^(\w+) (.+)? <(.*)> (\d+) ([+-]\d+)')
+
+def die(msg, *args):
+    sys.stderr.write('ERROR: %s\n' % (msg % args))
+    sys.exit(1)
+
+def warn(msg, *args):
+    sys.stderr.write('WARNING: %s\n' % (msg % args))
+
+def gittz(tz):
+    return '%+03d%02d' % (tz / 3600, tz % 3600 / 60)
+
+class Marks:
+
+    def __init__(self, path):
+        self.path = path
+        self.tips = {}
+        self.marks = {}
+        self.rev_marks = {}
+        self.last_mark = 0
+        self.load()
+
+    def load(self):
+        if not os.path.exists(self.path):
+            return
+
+        tmp = json.load(open(self.path))
+        self.tips = tmp['tips']
+        self.marks = tmp['marks']
+        self.last_mark = tmp['last-mark']
+
+        for rev, mark in self.marks.iteritems():
+            self.rev_marks[mark] = rev
+
+    def dict(self):
+        return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark }
+
+    def store(self):
+        json.dump(self.dict(), open(self.path, 'w'))
+
+    def __str__(self):
+        return str(self.dict())
+
+    def from_rev(self, rev):
+        return self.marks[rev]
+
+    def to_rev(self, mark):
+        return self.rev_marks[mark]
+
+    def next_mark(self):
+        self.last_mark += 1
+        return self.last_mark
+
+    def get_mark(self, rev):
+        self.last_mark += 1
+        self.marks[rev] = self.last_mark
+        return self.last_mark
+
+    def is_marked(self, rev):
+        return self.marks.has_key(rev)
+
+    def new_mark(self, rev, mark):
+        self.marks[rev] = mark
+        self.rev_marks[mark] = rev
+        self.last_mark = mark
+
+    def get_tip(self, branch):
+        return self.tips.get(branch, None)
+
+    def set_tip(self, branch, tip):
+        self.tips[branch] = tip
+
+class Parser:
+
+    def __init__(self, repo):
+        self.repo = repo
+        self.line = self.get_line()
+
+    def get_line(self):
+        return sys.stdin.readline().strip()
+
+    def __getitem__(self, i):
+        return self.line.split()[i]
+
+    def check(self, word):
+        return self.line.startswith(word)
+
+    def each_block(self, separator):
+        while self.line != separator:
+            yield self.line
+            self.line = self.get_line()
+
+    def __iter__(self):
+        return self.each_block('')
+
+    def next(self):
+        self.line = self.get_line()
+        if self.line == 'done':
+            self.line = None
+
+    def get_mark(self):
+        i = self.line.index(':') + 1
+        return int(self.line[i:])
+
+    def get_data(self):
+        if not self.check('data'):
+            return None
+        i = self.line.index(' ') + 1
+        size = int(self.line[i:])
+        return sys.stdin.read(size)
+
+    def get_author(self):
+        m = RAW_AUTHOR_RE.match(self.line)
+        if not m:
+            return None
+        _, name, email, date, tz = m.groups()
+        committer = '%s <%s>' % (name, email)
+        tz = int(tz)
+        tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
+        return (committer, int(date), tz)
+
+def rev_to_mark(rev):
+    global marks
+    return marks.from_rev(rev)
+
+def mark_to_rev(mark):
+    global marks
+    return marks.to_rev(mark)
+
+def fixup_user(user):
+    name = mail = None
+    user = user.replace('"', '')
+    m = AUTHOR_RE.match(user)
+    if m:
+        name = m.group(1)
+        mail = m.group(2).strip()
+    else:
+        m = NAME_RE.match(user)
+        if m:
+            name = m.group(1).strip()
+
+    return '%s <%s>' % (name, mail)
+
+def get_filechanges(cur, prev):
+    modified = {}
+    removed = {}
+
+    changes = cur.changes_from(prev)
+
+    for path, fid, kind in changes.added:
+        modified[path] = fid
+    for path, fid, kind in changes.removed:
+        removed[path] = None
+    for path, fid, kind, mod, _ in changes.modified:
+        modified[path] = fid
+    for oldpath, newpath, fid, kind, mod, _ in changes.renamed:
+        removed[oldpath] = None
+        modified[newpath] = fid
+
+    return modified, removed
+
+def export_files(tree, files):
+    global marks, filenodes
+
+    final = []
+    for path, fid in files.iteritems():
+        kind = tree.kind(fid)
+
+        h = tree.get_file_sha1(fid)
+
+        if kind == 'symlink':
+            d = tree.get_symlink_target(fid)
+            mode = '120000'
+        elif kind == 'file':
+
+            if tree.is_executable(fid):
+                mode = '100755'
+            else:
+                mode = '100644'
+
+            # is the blog already exported?
+            if h in filenodes:
+                mark = filenodes[h]
+                final.append((mode, mark, path))
+                continue
+
+            d = tree.get_file_text(fid)
+        elif kind == 'directory':
+            continue
+        else:
+            die("Unhandled kind '%s' for path '%s'" % (kind, path))
+
+        mark = marks.next_mark()
+        filenodes[h] = mark
+
+        print "blob"
+        print "mark :%u" % mark
+        print "data %d" % len(d)
+        print d
+
+        final.append((mode, mark, path))
+
+    return final
+
+def export_branch(branch, name):
+    global prefix, dirname
+
+    ref = '%s/heads/%s' % (prefix, name)
+    tip = marks.get_tip(name)
+
+    repo = branch.repository
+    repo.lock_read()
+    revs = branch.iter_merge_sorted_revisions(None, tip, 'exclude', 'forward')
+    count = 0
+
+    revs = [revid for revid, _, _, _ in revs if not marks.is_marked(revid)]
+
+    for revid in revs:
+
+        rev = repo.get_revision(revid)
+
+        parents = rev.parent_ids
+        time = rev.timestamp
+        tz = rev.timezone
+        committer = rev.committer.encode('utf-8')
+        committer = "%s %u %s" % (fixup_user(committer), time, gittz(tz))
+        author = committer
+        msg = rev.message.encode('utf-8')
+
+        msg += '\n'
+
+        if len(parents) == 0:
+            parent = bzrlib.revision.NULL_REVISION
+        else:
+            parent = parents[0]
+
+        cur_tree = repo.revision_tree(revid)
+        prev = repo.revision_tree(parent)
+        modified, removed = get_filechanges(cur_tree, prev)
+
+        modified_final = export_files(cur_tree, modified)
+
+        if len(parents) == 0:
+            print 'reset %s' % ref
+
+        print "commit %s" % ref
+        print "mark :%d" % (marks.get_mark(revid))
+        print "author %s" % (author)
+        print "committer %s" % (committer)
+        print "data %d" % (len(msg))
+        print msg
+
+        for i, p in enumerate(parents):
+            try:
+                m = rev_to_mark(p)
+            except KeyError:
+                # ghost?
+                continue
+            if i == 0:
+                print "from :%s" % m
+            else:
+                print "merge :%s" % m
+
+        for f in modified_final:
+            print "M %s :%u %s" % f
+        for f in removed:
+            print "D %s" % (f)
+        print
+
+        count += 1
+        if (count % 100 == 0):
+            print "progress revision %s (%d/%d)" % (revid, count, len(revs))
+            print "#############################################################"
+
+    repo.unlock()
+
+    revid = branch.last_revision()
+
+    # make sure the ref is updated
+    print "reset %s" % ref
+    print "from :%u" % rev_to_mark(revid)
+    print
+
+    marks.set_tip(name, revid)
+
+def export_tag(repo, name):
+    global tags
+    try:
+        print "reset refs/tags/%s" % name
+        print "from :%u" % rev_to_mark(tags[name])
+        print
+    except KeyError:
+        warn("TODO: fetch tag '%s'" % name)
+
+def do_import(parser):
+    global dirname
+
+    branch = parser.repo
+    path = os.path.join(dirname, 'marks-git')
+
+    print "feature done"
+    if os.path.exists(path):
+        print "feature import-marks=%s" % path
+    print "feature export-marks=%s" % path
+    sys.stdout.flush()
+
+    while parser.check('import'):
+        ref = parser[1]
+        if ref.startswith('refs/heads/'):
+            name = ref[len('refs/heads/'):]
+            export_branch(branch, name)
+        if ref.startswith('refs/tags/'):
+            name = ref[len('refs/tags/'):]
+            export_tag(branch, name)
+        parser.next()
+
+    print 'done'
+
+    sys.stdout.flush()
+
+def parse_blob(parser):
+    global blob_marks
+
+    parser.next()
+    mark = parser.get_mark()
+    parser.next()
+    data = parser.get_data()
+    blob_marks[mark] = data
+    parser.next()
+
+class CustomTree():
+
+    def __init__(self, repo, revid, parents, files):
+        global files_cache
+
+        self.repo = repo
+        self.revid = revid
+        self.parents = parents
+        self.updates = {}
+
+        def copy_tree(revid):
+            files = files_cache[revid] = {}
+            tree = repo.repository.revision_tree(revid)
+            repo.lock_read()
+            try:
+                for path, entry in tree.iter_entries_by_dir():
+                    files[path] = entry.file_id
+            finally:
+                repo.unlock()
+            return files
+
+        if len(parents) == 0:
+            self.base_id = bzrlib.revision.NULL_REVISION
+            self.base_files = {}
+        else:
+            self.base_id = parents[0]
+            self.base_files = files_cache.get(self.base_id, None)
+            if not self.base_files:
+                self.base_files = copy_tree(self.base_id)
+
+        self.files = files_cache[revid] = self.base_files.copy()
+
+        for path, f in files.iteritems():
+            fid = self.files.get(path, None)
+            if not fid:
+                fid = bzrlib.generate_ids.gen_file_id(path)
+            f['path'] = path
+            self.updates[fid] = f
+
+    def last_revision(self):
+        return self.base_id
+
+    def iter_changes(self):
+        changes = []
+
+        def get_parent(dirname, basename):
+            parent_fid = self.base_files.get(dirname, None)
+            if parent_fid:
+                return parent_fid
+            parent_fid = self.files.get(dirname, None)
+            if parent_fid:
+                return parent_fid
+            if basename == '':
+                return None
+            fid = bzrlib.generate_ids.gen_file_id(path)
+            d = add_entry(fid, dirname, 'directory')
+            return fid
+
+        def add_entry(fid, path, kind, mode = None):
+            dirname, basename = os.path.split(path)
+            parent_fid = get_parent(dirname, basename)
+
+            executable = False
+            if mode == '100755':
+                executable = True
+            elif mode == '120000':
+                kind = 'symlink'
+
+            change = (fid,
+                    (None, path),
+                    True,
+                    (False, True),
+                    (None, parent_fid),
+                    (None, basename),
+                    (None, kind),
+                    (None, executable))
+            self.files[path] = change[0]
+            changes.append(change)
+            return change
+
+        def update_entry(fid, path, kind, mode = None):
+            dirname, basename = os.path.split(path)
+            parent_fid = get_parent(dirname, basename)
+
+            executable = False
+            if mode == '100755':
+                executable = True
+            elif mode == '120000':
+                kind = 'symlink'
+
+            change = (fid,
+                    (path, path),
+                    True,
+                    (True, True),
+                    (None, parent_fid),
+                    (None, basename),
+                    (None, kind),
+                    (None, executable))
+            self.files[path] = change[0]
+            changes.append(change)
+            return change
+
+        def remove_entry(fid, path, kind):
+            dirname, basename = os.path.split(path)
+            parent_fid = get_parent(dirname, basename)
+            change = (fid,
+                    (path, None),
+                    True,
+                    (True, False),
+                    (parent_fid, None),
+                    (None, None),
+                    (None, None),
+                    (None, None))
+            del self.files[path]
+            changes.append(change)
+            return change
+
+        for fid, f in self.updates.iteritems():
+            path = f['path']
+
+            if 'deleted' in f:
+                remove_entry(fid, path, 'file')
+                continue
+
+            if path in self.base_files:
+                update_entry(fid, path, 'file', f['mode'])
+            else:
+                add_entry(fid, path, 'file', f['mode'])
+
+        return changes
+
+    def get_file_with_stat(self, file_id, path=None):
+        return (StringIO.StringIO(self.updates[file_id]['data']), None)
+
+    def get_symlink_target(self, file_id):
+        return self.updates[file_id]['data']
+
+def parse_commit(parser):
+    global marks, blob_marks, bmarks, parsed_refs
+    global mode
+
+    parents = []
+
+    ref = parser[1]
+    parser.next()
+
+    if ref != 'refs/heads/master':
+        die("bzr doesn't support multiple branches; use 'master'")
+
+    commit_mark = parser.get_mark()
+    parser.next()
+    author = parser.get_author()
+    parser.next()
+    committer = parser.get_author()
+    parser.next()
+    data = parser.get_data()
+    parser.next()
+    if parser.check('from'):
+        parents.append(parser.get_mark())
+        parser.next()
+    while parser.check('merge'):
+        parents.append(parser.get_mark())
+        parser.next()
+
+    files = {}
+
+    for line in parser:
+        if parser.check('M'):
+            t, m, mark_ref, path = line.split(' ', 3)
+            mark = int(mark_ref[1:])
+            f = { 'mode' : m, 'data' : blob_marks[mark] }
+        elif parser.check('D'):
+            t, path = line.split(' ')
+            f = { 'deleted' : True }
+        else:
+            die('Unknown file command: %s' % line)
+        files[path] = f
+
+    repo = parser.repo
+
+    committer, date, tz = committer
+    parents = [str(mark_to_rev(p)) for p in parents]
+    revid = bzrlib.generate_ids.gen_revision_id(committer, date)
+    props = {}
+    props['branch-nick'] = repo.nick
+
+    mtree = CustomTree(repo, revid, parents, files)
+    changes = mtree.iter_changes()
+
+    repo.lock_write()
+    try:
+        builder = repo.get_commit_builder(parents, None, date, tz, committer, props, revid)
+        try:
+            list(builder.record_iter_changes(mtree, mtree.last_revision(), changes))
+            builder.finish_inventory()
+            builder.commit(data.decode('utf-8', 'replace'))
+        except Exception, e:
+            builder.abort()
+            raise
+    finally:
+        repo.unlock()
+
+    parsed_refs[ref] = revid
+    marks.new_mark(revid, commit_mark)
+
+def parse_reset(parser):
+    global parsed_refs
+
+    ref = parser[1]
+    parser.next()
+
+    if ref != 'refs/heads/master':
+        die("bzr doesn't support multiple branches; use 'master'")
+
+    # ugh
+    if parser.check('commit'):
+        parse_commit(parser)
+        return
+    if not parser.check('from'):
+        return
+    from_mark = parser.get_mark()
+    parser.next()
+
+    parsed_refs[ref] = mark_to_rev(from_mark)
+
+def do_export(parser):
+    global parsed_refs, dirname, peer
+
+    parser.next()
+
+    for line in parser.each_block('done'):
+        if parser.check('blob'):
+            parse_blob(parser)
+        elif parser.check('commit'):
+            parse_commit(parser)
+        elif parser.check('reset'):
+            parse_reset(parser)
+        elif parser.check('tag'):
+            pass
+        elif parser.check('feature'):
+            pass
+        else:
+            die('unhandled export command: %s' % line)
+
+    repo = parser.repo
+
+    for ref, revid in parsed_refs.iteritems():
+        if ref == 'refs/heads/master':
+            repo.generate_revision_history(revid, marks.get_tip('master'))
+            revno, revid = repo.last_revision_info()
+            if peer:
+                if hasattr(peer, "import_last_revision_info_and_tags"):
+                    peer.import_last_revision_info_and_tags(repo, revno, revid)
+                else:
+                    peer.import_last_revision_info(repo.repository, revno, revid)
+                wt = peer.bzrdir.open_workingtree()
+            else:
+                wt = repo.bzrdir.open_workingtree()
+            wt.update()
+        print "ok %s" % ref
+    print
+
+def do_capabilities(parser):
+    global dirname
+
+    print "import"
+    print "export"
+    print "refspec refs/heads/*:%s/heads/*" % prefix
+
+    path = os.path.join(dirname, 'marks-git')
+
+    if os.path.exists(path):
+        print "*import-marks %s" % path
+    print "*export-marks %s" % path
+
+    print
+
+def do_list(parser):
+    global tags
+    print "? refs/heads/%s" % 'master'
+    for tag, revid in parser.repo.tags.get_tag_dict().items():
+        print "? refs/tags/%s" % tag
+        tags[tag] = revid
+    print "@refs/heads/%s HEAD" % 'master'
+    print
+
+def get_repo(url, alias):
+    global dirname, peer
+
+    origin = bzrlib.bzrdir.BzrDir.open(url)
+    branch = origin.open_branch()
+
+    if not isinstance(origin.transport, bzrlib.transport.local.LocalTransport):
+        clone_path = os.path.join(dirname, 'clone')
+        remote_branch = branch
+        if os.path.exists(clone_path):
+            # pull
+            d = bzrlib.bzrdir.BzrDir.open(clone_path)
+            branch = d.open_branch()
+            result = branch.pull(remote_branch, [], None, False)
+        else:
+            # clone
+            d = origin.sprout(clone_path, None,
+                    hardlink=True, create_tree_if_local=False,
+                    source_branch=remote_branch)
+            branch = d.open_branch()
+            branch.bind(remote_branch)
+
+        peer = remote_branch
+    else:
+        peer = None
+
+    return branch
+
+def main(args):
+    global marks, prefix, dirname
+    global tags, filenodes
+    global blob_marks
+    global parsed_refs
+    global files_cache
+
+    alias = args[1]
+    url = args[2]
+
+    prefix = 'refs/bzr/%s' % alias
+    tags = {}
+    filenodes = {}
+    blob_marks = {}
+    parsed_refs = {}
+    files_cache = {}
+
+    gitdir = os.environ['GIT_DIR']
+    dirname = os.path.join(gitdir, 'bzr', alias)
+
+    if not os.path.exists(dirname):
+        os.makedirs(dirname)
+
+    repo = get_repo(url, alias)
+
+    marks_path = os.path.join(dirname, 'marks-int')
+    marks = Marks(marks_path)
+
+    parser = Parser(repo)
+    for line in parser:
+        if parser.check('capabilities'):
+            do_capabilities(parser)
+        elif parser.check('list'):
+            do_list(parser)
+        elif parser.check('import'):
+            do_import(parser)
+        elif parser.check('export'):
+            do_export(parser)
+        else:
+            die('unhandled command: %s' % line)
+        sys.stdout.flush()
+
+    marks.store()
+
+sys.exit(main(sys.argv))
diff --git a/contrib/remote-helpers/git-remote-hg b/contrib/remote-helpers/git-remote-hg
new file mode 100755
index 0000000000..328c2dc76d
--- /dev/null
+++ b/contrib/remote-helpers/git-remote-hg
@@ -0,0 +1,805 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+
+# Inspired by Rocco Rutte's hg-fast-export
+
+# Just copy to your ~/bin, or anywhere in your $PATH.
+# Then you can clone with:
+# git clone hg::/path/to/mercurial/repo/
+
+from mercurial import hg, ui, bookmarks, context, util, encoding
+
+import re
+import sys
+import os
+import json
+import shutil
+import subprocess
+import urllib
+
+#
+# If you want to switch to hg-git compatibility mode:
+# git config --global remote-hg.hg-git-compat true
+#
+# git:
+# Sensible defaults for git.
+# hg bookmarks are exported as git branches, hg branches are prefixed
+# with 'branches/', HEAD is a special case.
+#
+# hg:
+# Emulate hg-git.
+# Only hg bookmarks are exported as git branches.
+# Commits are modified to preserve hg information and allow bidirectionality.
+#
+
+NAME_RE = re.compile('^([^<>]+)')
+AUTHOR_RE = re.compile('^([^<>]+?)? ?<([^<>]*)>$')
+AUTHOR_HG_RE = re.compile('^(.*?) ?<(.*?)(?:>(.+)?)?$')
+RAW_AUTHOR_RE = re.compile('^(\w+) (?:(.+)? )?<(.*)> (\d+) ([+-]\d+)')
+
+def die(msg, *args):
+    sys.stderr.write('ERROR: %s\n' % (msg % args))
+    sys.exit(1)
+
+def warn(msg, *args):
+    sys.stderr.write('WARNING: %s\n' % (msg % args))
+
+def gitmode(flags):
+    return 'l' in flags and '120000' or 'x' in flags and '100755' or '100644'
+
+def gittz(tz):
+    return '%+03d%02d' % (-tz / 3600, -tz % 3600 / 60)
+
+def hgmode(mode):
+    m = { '100755': 'x', '120000': 'l' }
+    return m.get(mode, '')
+
+def get_config(config):
+    cmd = ['git', 'config', '--get', config]
+    process = subprocess.Popen(cmd, stdout=subprocess.PIPE)
+    output, _ = process.communicate()
+    return output
+
+class Marks:
+
+    def __init__(self, path):
+        self.path = path
+        self.tips = {}
+        self.marks = {}
+        self.rev_marks = {}
+        self.last_mark = 0
+
+        self.load()
+
+    def load(self):
+        if not os.path.exists(self.path):
+            return
+
+        tmp = json.load(open(self.path))
+
+        self.tips = tmp['tips']
+        self.marks = tmp['marks']
+        self.last_mark = tmp['last-mark']
+
+        for rev, mark in self.marks.iteritems():
+            self.rev_marks[mark] = int(rev)
+
+    def dict(self):
+        return { 'tips': self.tips, 'marks': self.marks, 'last-mark' : self.last_mark }
+
+    def store(self):
+        json.dump(self.dict(), open(self.path, 'w'))
+
+    def __str__(self):
+        return str(self.dict())
+
+    def from_rev(self, rev):
+        return self.marks[str(rev)]
+
+    def to_rev(self, mark):
+        return self.rev_marks[mark]
+
+    def get_mark(self, rev):
+        self.last_mark += 1
+        self.marks[str(rev)] = self.last_mark
+        return self.last_mark
+
+    def new_mark(self, rev, mark):
+        self.marks[str(rev)] = mark
+        self.rev_marks[mark] = rev
+        self.last_mark = mark
+
+    def is_marked(self, rev):
+        return self.marks.has_key(str(rev))
+
+    def get_tip(self, branch):
+        return self.tips.get(branch, 0)
+
+    def set_tip(self, branch, tip):
+        self.tips[branch] = tip
+
+class Parser:
+
+    def __init__(self, repo):
+        self.repo = repo
+        self.line = self.get_line()
+
+    def get_line(self):
+        return sys.stdin.readline().strip()
+
+    def __getitem__(self, i):
+        return self.line.split()[i]
+
+    def check(self, word):
+        return self.line.startswith(word)
+
+    def each_block(self, separator):
+        while self.line != separator:
+            yield self.line
+            self.line = self.get_line()
+
+    def __iter__(self):
+        return self.each_block('')
+
+    def next(self):
+        self.line = self.get_line()
+        if self.line == 'done':
+            self.line = None
+
+    def get_mark(self):
+        i = self.line.index(':') + 1
+        return int(self.line[i:])
+
+    def get_data(self):
+        if not self.check('data'):
+            return None
+        i = self.line.index(' ') + 1
+        size = int(self.line[i:])
+        return sys.stdin.read(size)
+
+    def get_author(self):
+        global bad_mail
+
+        ex = None
+        m = RAW_AUTHOR_RE.match(self.line)
+        if not m:
+            return None
+        _, name, email, date, tz = m.groups()
+        if name and 'ext:' in name:
+            m = re.match('^(.+?) ext:\((.+)\)$', name)
+            if m:
+                name = m.group(1)
+                ex = urllib.unquote(m.group(2))
+
+        if email != bad_mail:
+            if name:
+                user = '%s <%s>' % (name, email)
+            else:
+                user = '<%s>' % (email)
+        else:
+            user = name
+
+        if ex:
+            user += ex
+
+        tz = int(tz)
+        tz = ((tz / 100) * 3600) + ((tz % 100) * 60)
+        return (user, int(date), -tz)
+
+def export_file(fc):
+    d = fc.data()
+    print "M %s inline %s" % (gitmode(fc.flags()), fc.path())
+    print "data %d" % len(d)
+    print d
+
+def get_filechanges(repo, ctx, parent):
+    modified = set()
+    added = set()
+    removed = set()
+
+    cur = ctx.manifest()
+    prev = repo[parent].manifest().copy()
+
+    for fn in cur:
+        if fn in prev:
+            if (cur.flags(fn) != prev.flags(fn) or cur[fn] != prev[fn]):
+                modified.add(fn)
+            del prev[fn]
+        else:
+            added.add(fn)
+    removed |= set(prev.keys())
+
+    return added | modified, removed
+
+def fixup_user_git(user):
+    name = mail = None
+    user = user.replace('"', '')
+    m = AUTHOR_RE.match(user)
+    if m:
+        name = m.group(1)
+        mail = m.group(2).strip()
+    else:
+        m = NAME_RE.match(user)
+        if m:
+            name = m.group(1).strip()
+    return (name, mail)
+
+def fixup_user_hg(user):
+    def sanitize(name):
+        # stole this from hg-git
+        return re.sub('[<>\n]', '?', name.lstrip('< ').rstrip('> '))
+
+    m = AUTHOR_HG_RE.match(user)
+    if m:
+        name = sanitize(m.group(1))
+        mail = sanitize(m.group(2))
+        ex = m.group(3)
+        if ex:
+            name += ' ext:(' + urllib.quote(ex) + ')'
+    else:
+        name = sanitize(user)
+        if '@' in user:
+            mail = name
+        else:
+            mail = None
+
+    return (name, mail)
+
+def fixup_user(user):
+    global mode, bad_mail
+
+    if mode == 'git':
+        name, mail = fixup_user_git(user)
+    else:
+        name, mail = fixup_user_hg(user)
+
+    if not name:
+        name = bad_name
+    if not mail:
+        mail = bad_mail
+
+    return '%s <%s>' % (name, mail)
+
+def get_repo(url, alias):
+    global dirname, peer
+
+    myui = ui.ui()
+    myui.setconfig('ui', 'interactive', 'off')
+
+    if hg.islocal(url):
+        repo = hg.repository(myui, url)
+    else:
+        local_path = os.path.join(dirname, 'clone')
+        if not os.path.exists(local_path):
+            peer, dstpeer = hg.clone(myui, {}, url, local_path, update=False, pull=True)
+            repo = dstpeer.local()
+        else:
+            repo = hg.repository(myui, local_path)
+            peer = hg.peer(myui, {}, url)
+            repo.pull(peer, heads=None, force=True)
+
+    return repo
+
+def rev_to_mark(rev):
+    global marks
+    return marks.from_rev(rev)
+
+def mark_to_rev(mark):
+    global marks
+    return marks.to_rev(mark)
+
+def export_ref(repo, name, kind, head):
+    global prefix, marks, mode
+
+    ename = '%s/%s' % (kind, name)
+    tip = marks.get_tip(ename)
+
+    # mercurial takes too much time checking this
+    if tip and tip == head.rev():
+        # nothing to do
+        return
+    revs = xrange(tip, head.rev() + 1)
+    count = 0
+
+    revs = [rev for rev in revs if not marks.is_marked(rev)]
+
+    for rev in revs:
+
+        c = repo[rev]
+        (manifest, user, (time, tz), files, desc, extra) = repo.changelog.read(c.node())
+        rev_branch = extra['branch']
+
+        author = "%s %d %s" % (fixup_user(user), time, gittz(tz))
+        if 'committer' in extra:
+            user, time, tz = extra['committer'].rsplit(' ', 2)
+            committer = "%s %s %s" % (user, time, gittz(int(tz)))
+        else:
+            committer = author
+
+        parents = [p for p in repo.changelog.parentrevs(rev) if p >= 0]
+
+        if len(parents) == 0:
+            modified = c.manifest().keys()
+            removed = []
+        else:
+            modified, removed = get_filechanges(repo, c, parents[0])
+
+        if mode == 'hg':
+            extra_msg = ''
+
+            if rev_branch != 'default':
+                extra_msg += 'branch : %s\n' % rev_branch
+
+            renames = []
+            for f in c.files():
+                if f not in c.manifest():
+                    continue
+                rename = c.filectx(f).renamed()
+                if rename:
+                    renames.append((rename[0], f))
+
+            for e in renames:
+                extra_msg += "rename : %s => %s\n" % e
+
+            for key, value in extra.iteritems():
+                if key in ('author', 'committer', 'encoding', 'message', 'branch', 'hg-git'):
+                    continue
+                else:
+                    extra_msg += "extra : %s : %s\n" % (key, urllib.quote(value))
+
+            desc += '\n'
+            if extra_msg:
+                desc += '\n--HG--\n' + extra_msg
+
+        if len(parents) == 0 and rev:
+            print 'reset %s/%s' % (prefix, ename)
+
+        print "commit %s/%s" % (prefix, ename)
+        print "mark :%d" % (marks.get_mark(rev))
+        print "author %s" % (author)
+        print "committer %s" % (committer)
+        print "data %d" % (len(desc))
+        print desc
+
+        if len(parents) > 0:
+            print "from :%s" % (rev_to_mark(parents[0]))
+            if len(parents) > 1:
+                print "merge :%s" % (rev_to_mark(parents[1]))
+
+        for f in modified:
+            export_file(c.filectx(f))
+        for f in removed:
+            print "D %s" % (f)
+        print
+
+        count += 1
+        if (count % 100 == 0):
+            print "progress revision %d '%s' (%d/%d)" % (rev, name, count, len(revs))
+            print "#############################################################"
+
+    # make sure the ref is updated
+    print "reset %s/%s" % (prefix, ename)
+    print "from :%u" % rev_to_mark(rev)
+    print
+
+    marks.set_tip(ename, rev)
+
+def export_tag(repo, tag):
+    export_ref(repo, tag, 'tags', repo[tag])
+
+def export_bookmark(repo, bmark):
+    head = bmarks[bmark]
+    export_ref(repo, bmark, 'bookmarks', head)
+
+def export_branch(repo, branch):
+    tip = get_branch_tip(repo, branch)
+    head = repo[tip]
+    export_ref(repo, branch, 'branches', head)
+
+def export_head(repo):
+    global g_head
+    export_ref(repo, g_head[0], 'bookmarks', g_head[1])
+
+def do_capabilities(parser):
+    global prefix, dirname
+
+    print "import"
+    print "export"
+    print "refspec refs/heads/branches/*:%s/branches/*" % prefix
+    print "refspec refs/heads/*:%s/bookmarks/*" % prefix
+    print "refspec refs/tags/*:%s/tags/*" % prefix
+
+    path = os.path.join(dirname, 'marks-git')
+
+    if os.path.exists(path):
+        print "*import-marks %s" % path
+    print "*export-marks %s" % path
+
+    print
+
+def get_branch_tip(repo, branch):
+    global branches
+
+    heads = branches.get(branch, None)
+    if not heads:
+        return None
+
+    # verify there's only one head
+    if (len(heads) > 1):
+        warn("Branch '%s' has more than one head, consider merging" % branch)
+        # older versions of mercurial don't have this
+        if hasattr(repo, "branchtip"):
+            return repo.branchtip(branch)
+
+    return heads[0]
+
+def list_head(repo, cur):
+    global g_head, bmarks
+
+    head = bookmarks.readcurrent(repo)
+    if head:
+        node = repo[head]
+    else:
+        # fake bookmark from current branch
+        head = cur
+        node = repo['.']
+        if not node:
+            node = repo['tip']
+        if not node:
+            return
+        if head == 'default':
+            head = 'master'
+        bmarks[head] = node
+
+    print "@refs/heads/%s HEAD" % head
+    g_head = (head, node)
+
+def do_list(parser):
+    global branches, bmarks, mode, track_branches
+
+    repo = parser.repo
+    for bmark, node in bookmarks.listbookmarks(repo).iteritems():
+        bmarks[bmark] = repo[node]
+
+    cur = repo.dirstate.branch()
+
+    list_head(repo, cur)
+
+    if track_branches:
+        for branch in repo.branchmap():
+            heads = repo.branchheads(branch)
+            if len(heads):
+                branches[branch] = heads
+
+        for branch in branches:
+            print "? refs/heads/branches/%s" % branch
+
+    for bmark in bmarks:
+        print "? refs/heads/%s" % bmark
+
+    for tag, node in repo.tagslist():
+        if tag == 'tip':
+            continue
+        print "? refs/tags/%s" % tag
+
+    print
+
+def do_import(parser):
+    repo = parser.repo
+
+    path = os.path.join(dirname, 'marks-git')
+
+    print "feature done"
+    if os.path.exists(path):
+        print "feature import-marks=%s" % path
+    print "feature export-marks=%s" % path
+    sys.stdout.flush()
+
+    tmp = encoding.encoding
+    encoding.encoding = 'utf-8'
+
+    # lets get all the import lines
+    while parser.check('import'):
+        ref = parser[1]
+
+        if (ref == 'HEAD'):
+            export_head(repo)
+        elif ref.startswith('refs/heads/branches/'):
+            branch = ref[len('refs/heads/branches/'):]
+            export_branch(repo, branch)
+        elif ref.startswith('refs/heads/'):
+            bmark = ref[len('refs/heads/'):]
+            export_bookmark(repo, bmark)
+        elif ref.startswith('refs/tags/'):
+            tag = ref[len('refs/tags/'):]
+            export_tag(repo, tag)
+
+        parser.next()
+
+    encoding.encoding = tmp
+
+    print 'done'
+
+def parse_blob(parser):
+    global blob_marks
+
+    parser.next()
+    mark = parser.get_mark()
+    parser.next()
+    data = parser.get_data()
+    blob_marks[mark] = data
+    parser.next()
+    return
+
+def get_merge_files(repo, p1, p2, files):
+    for e in repo[p1].files():
+        if e not in files:
+            if e not in repo[p1].manifest():
+                continue
+            f = { 'ctx' : repo[p1][e] }
+            files[e] = f
+
+def parse_commit(parser):
+    global marks, blob_marks, bmarks, parsed_refs
+    global mode
+
+    from_mark = merge_mark = None
+
+    ref = parser[1]
+    parser.next()
+
+    commit_mark = parser.get_mark()
+    parser.next()
+    author = parser.get_author()
+    parser.next()
+    committer = parser.get_author()
+    parser.next()
+    data = parser.get_data()
+    parser.next()
+    if parser.check('from'):
+        from_mark = parser.get_mark()
+        parser.next()
+    if parser.check('merge'):
+        merge_mark = parser.get_mark()
+        parser.next()
+        if parser.check('merge'):
+            die('octopus merges are not supported yet')
+
+    files = {}
+
+    for line in parser:
+        if parser.check('M'):
+            t, m, mark_ref, path = line.split(' ', 3)
+            mark = int(mark_ref[1:])
+            f = { 'mode' : hgmode(m), 'data' : blob_marks[mark] }
+        elif parser.check('D'):
+            t, path = line.split(' ')
+            f = { 'deleted' : True }
+        else:
+            die('Unknown file command: %s' % line)
+        files[path] = f
+
+    def getfilectx(repo, memctx, f):
+        of = files[f]
+        if 'deleted' in of:
+            raise IOError
+        if 'ctx' in of:
+            return of['ctx']
+        is_exec = of['mode'] == 'x'
+        is_link = of['mode'] == 'l'
+        rename = of.get('rename', None)
+        return context.memfilectx(f, of['data'],
+                is_link, is_exec, rename)
+
+    repo = parser.repo
+
+    user, date, tz = author
+    extra = {}
+
+    if committer != author:
+        extra['committer'] = "%s %u %u" % committer
+
+    if from_mark:
+        p1 = repo.changelog.node(mark_to_rev(from_mark))
+    else:
+        p1 = '\0' * 20
+
+    if merge_mark:
+        p2 = repo.changelog.node(mark_to_rev(merge_mark))
+    else:
+        p2 = '\0' * 20
+
+    #
+    # If files changed from any of the parents, hg wants to know, but in git if
+    # nothing changed from the first parent, nothing changed.
+    #
+    if merge_mark:
+        get_merge_files(repo, p1, p2, files)
+
+    if mode == 'hg':
+        i = data.find('\n--HG--\n')
+        if i >= 0:
+            tmp = data[i + len('\n--HG--\n'):].strip()
+            for k, v in [e.split(' : ') for e in tmp.split('\n')]:
+                if k == 'rename':
+                    old, new = v.split(' => ', 1)
+                    files[new]['rename'] = old
+                elif k == 'branch':
+                    extra[k] = v
+                elif k == 'extra':
+                    ek, ev = v.split(' : ', 1)
+                    extra[ek] = urllib.unquote(ev)
+            data = data[:i]
+
+    ctx = context.memctx(repo, (p1, p2), data,
+            files.keys(), getfilectx,
+            user, (date, tz), extra)
+
+    tmp = encoding.encoding
+    encoding.encoding = 'utf-8'
+
+    node = repo.commitctx(ctx)
+
+    encoding.encoding = tmp
+
+    rev = repo[node].rev()
+
+    parsed_refs[ref] = node
+
+    marks.new_mark(rev, commit_mark)
+
+def parse_reset(parser):
+    ref = parser[1]
+    parser.next()
+    # ugh
+    if parser.check('commit'):
+        parse_commit(parser)
+        return
+    if not parser.check('from'):
+        return
+    from_mark = parser.get_mark()
+    parser.next()
+
+    node = parser.repo.changelog.node(mark_to_rev(from_mark))
+    parsed_refs[ref] = node
+
+def parse_tag(parser):
+    name = parser[1]
+    parser.next()
+    from_mark = parser.get_mark()
+    parser.next()
+    tagger = parser.get_author()
+    parser.next()
+    data = parser.get_data()
+    parser.next()
+
+    # nothing to do
+
+def do_export(parser):
+    global parsed_refs, bmarks, peer
+
+    parser.next()
+
+    for line in parser.each_block('done'):
+        if parser.check('blob'):
+            parse_blob(parser)
+        elif parser.check('commit'):
+            parse_commit(parser)
+        elif parser.check('reset'):
+            parse_reset(parser)
+        elif parser.check('tag'):
+            parse_tag(parser)
+        elif parser.check('feature'):
+            pass
+        else:
+            die('unhandled export command: %s' % line)
+
+    for ref, node in parsed_refs.iteritems():
+        if ref.startswith('refs/heads/branches'):
+            pass
+        elif ref.startswith('refs/heads/'):
+            bmark = ref[len('refs/heads/'):]
+            if bmark in bmarks:
+                old = bmarks[bmark].hex()
+            else:
+                old = ''
+            if not bookmarks.pushbookmark(parser.repo, bmark, old, node):
+                continue
+        elif ref.startswith('refs/tags/'):
+            tag = ref[len('refs/tags/'):]
+            parser.repo.tag([tag], node, None, True, None, {})
+        else:
+            # transport-helper/fast-export bugs
+            continue
+        print "ok %s" % ref
+
+    print
+
+    if peer:
+        parser.repo.push(peer, force=False)
+
+def fix_path(alias, repo, orig_url):
+    repo_url = util.url(repo.url())
+    url = util.url(orig_url)
+    if str(url) == str(repo_url):
+        return
+    cmd = ['git', 'config', 'remote.%s.url' % alias, "hg::%s" % repo_url]
+    subprocess.call(cmd)
+
+def main(args):
+    global prefix, dirname, branches, bmarks
+    global marks, blob_marks, parsed_refs
+    global peer, mode, bad_mail, bad_name
+    global track_branches
+
+    alias = args[1]
+    url = args[2]
+    peer = None
+
+    hg_git_compat = False
+    track_branches = True
+    try:
+        if get_config('remote-hg.hg-git-compat') == 'true\n':
+            hg_git_compat = True
+            track_branches = False
+        if get_config('remote-hg.track-branches') == 'false\n':
+            track_branches = False
+    except subprocess.CalledProcessError:
+        pass
+
+    if hg_git_compat:
+        mode = 'hg'
+        bad_mail = 'none@none'
+        bad_name = ''
+    else:
+        mode = 'git'
+        bad_mail = 'unknown'
+        bad_name = 'Unknown'
+
+    if alias[4:] == url:
+        is_tmp = True
+        alias = util.sha1(alias).hexdigest()
+    else:
+        is_tmp = False
+
+    gitdir = os.environ['GIT_DIR']
+    dirname = os.path.join(gitdir, 'hg', alias)
+    branches = {}
+    bmarks = {}
+    blob_marks = {}
+    parsed_refs = {}
+
+    repo = get_repo(url, alias)
+    prefix = 'refs/hg/%s' % alias
+
+    if not is_tmp:
+        fix_path(alias, peer or repo, url)
+
+    if not os.path.exists(dirname):
+        os.makedirs(dirname)
+
+    marks_path = os.path.join(dirname, 'marks-hg')
+    marks = Marks(marks_path)
+
+    parser = Parser(repo)
+    for line in parser:
+        if parser.check('capabilities'):
+            do_capabilities(parser)
+        elif parser.check('list'):
+            do_list(parser)
+        elif parser.check('import'):
+            do_import(parser)
+        elif parser.check('export'):
+            do_export(parser)
+        else:
+            die('unhandled command: %s' % line)
+        sys.stdout.flush()
+
+    if not is_tmp:
+        marks.store()
+    else:
+        shutil.rmtree(dirname)
+
+sys.exit(main(sys.argv))
diff --git a/contrib/remote-helpers/test-bzr.sh b/contrib/remote-helpers/test-bzr.sh
new file mode 100755
index 0000000000..70aa8a010a
--- /dev/null
+++ b/contrib/remote-helpers/test-bzr.sh
@@ -0,0 +1,143 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+
+test_description='Test remote-bzr'
+
+. ./test-lib.sh
+
+if ! test_have_prereq PYTHON; then
+	skip_all='skipping remote-bzr tests; python not available'
+	test_done
+fi
+
+if ! "$PYTHON_PATH" -c 'import bzrlib'; then
+	skip_all='skipping remote-bzr tests; bzr not available'
+	test_done
+fi
+
+cmd='
+import bzrlib
+bzrlib.initialize()
+import bzrlib.plugin
+bzrlib.plugin.load_plugins()
+import bzrlib.plugins.fastimport
+'
+
+if ! "$PYTHON_PATH" -c "$cmd"; then
+	echo "consider setting BZR_PLUGIN_PATH=$HOME/.bazaar/plugins" 1>&2
+	skip_all='skipping remote-bzr tests; bzr-fastimport not available'
+	test_done
+fi
+
+check () {
+	(cd $1 &&
+	git log --format='%s' -1 &&
+	git symbolic-ref HEAD) > actual &&
+	(echo $2 &&
+	echo "refs/heads/$3") > expected &&
+	test_cmp expected actual
+}
+
+bzr whoami "A U Thor <author@example.com>"
+
+test_expect_success 'cloning' '
+  (bzr init bzrrepo &&
+  cd bzrrepo &&
+  echo one > content &&
+  bzr add content &&
+  bzr commit -m one
+  ) &&
+
+  git clone "bzr::$PWD/bzrrepo" gitrepo &&
+  check gitrepo one master
+'
+
+test_expect_success 'pulling' '
+  (cd bzrrepo &&
+  echo two > content &&
+  bzr commit -m two
+  ) &&
+
+  (cd gitrepo && git pull) &&
+
+  check gitrepo two master
+'
+
+test_expect_success 'pushing' '
+  (cd gitrepo &&
+  echo three > content &&
+  git commit -a -m three &&
+  git push
+  ) &&
+
+  echo three > expected &&
+  cat bzrrepo/content > actual &&
+  test_cmp expected actual
+'
+
+test_expect_success 'roundtrip' '
+  (cd gitrepo &&
+  git pull &&
+  git log --format="%s" -1 origin/master > actual) &&
+  echo three > expected &&
+  test_cmp expected actual &&
+
+  (cd gitrepo && git push && git pull) &&
+
+  (cd bzrrepo &&
+  echo four > content &&
+  bzr commit -m four
+  ) &&
+
+  (cd gitrepo && git pull && git push) &&
+
+  check gitrepo four master &&
+
+  (cd gitrepo &&
+  echo five > content &&
+  git commit -a -m five &&
+  git push && git pull
+  ) &&
+
+  (cd bzrrepo && bzr revert) &&
+
+  echo five > expected &&
+  cat bzrrepo/content > actual &&
+  test_cmp expected actual
+'
+
+cat > expected <<EOF
+100644 blob 54f9d6da5c91d556e6b54340b1327573073030af	content
+100755 blob 68769579c3eaadbe555379b9c3538e6628bae1eb	executable
+120000 blob 6b584e8ece562ebffc15d38808cd6b98fc3d97ea	link
+EOF
+
+test_expect_success 'special modes' '
+  (cd bzrrepo &&
+  echo exec > executable
+  chmod +x executable &&
+  bzr add executable
+  bzr commit -m exec &&
+  ln -s content link
+  bzr add link
+  bzr commit -m link &&
+  mkdir dir &&
+  bzr add dir &&
+  bzr commit -m dir) &&
+
+  (cd gitrepo &&
+  git pull
+  git ls-tree HEAD > ../actual) &&
+
+  test_cmp expected actual &&
+
+  (cd gitrepo &&
+  git cat-file -p HEAD:link > ../actual) &&
+
+  echo -n content > expected &&
+  test_cmp expected actual
+'
+
+test_done
diff --git a/contrib/remote-helpers/test-hg-bidi.sh b/contrib/remote-helpers/test-hg-bidi.sh
new file mode 100755
index 0000000000..1d61982436
--- /dev/null
+++ b/contrib/remote-helpers/test-hg-bidi.sh
@@ -0,0 +1,243 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+# Base commands from hg-git tests:
+# https://bitbucket.org/durin42/hg-git/src
+#
+
+test_description='Test bidirectionality of remote-hg'
+
+. ./test-lib.sh
+
+if ! test_have_prereq PYTHON; then
+	skip_all='skipping remote-hg tests; python not available'
+	test_done
+fi
+
+if ! "$PYTHON_PATH" -c 'import mercurial'; then
+	skip_all='skipping remote-hg tests; mercurial not available'
+	test_done
+fi
+
+# clone to a git repo
+git_clone () {
+	hg -R $1 bookmark -f -r tip master &&
+	git clone -q "hg::$PWD/$1" $2
+}
+
+# clone to an hg repo
+hg_clone () {
+	(
+	hg init $2 &&
+	cd $1 &&
+	git push -q "hg::$PWD/../$2" 'refs/tags/*:refs/tags/*' 'refs/heads/*:refs/heads/*'
+	) &&
+
+	(cd $2 && hg -q update)
+}
+
+# push an hg repo
+hg_push () {
+	(
+	cd $2
+	old=$(git symbolic-ref --short HEAD)
+	git checkout -q -b tmp &&
+	git fetch -q "hg::$PWD/../$1" 'refs/tags/*:refs/tags/*' 'refs/heads/*:refs/heads/*' &&
+	git checkout -q $old &&
+	git branch -q -D tmp 2> /dev/null || true
+	)
+}
+
+hg_log () {
+	hg -R $1 log --graph --debug | grep -v 'tag: *default/'
+}
+
+setup () {
+	(
+	echo "[ui]"
+	echo "username = A U Thor <author@example.com>"
+	echo "[defaults]"
+	echo "backout = -d \"0 0\""
+	echo "commit = -d \"0 0\""
+	echo "debugrawcommit = -d \"0 0\""
+	echo "tag = -d \"0 0\""
+	) >> "$HOME"/.hgrc &&
+	git config --global remote-hg.hg-git-compat true
+
+	export HGEDITOR=/usr/bin/true
+
+	export GIT_AUTHOR_DATE="2007-01-01 00:00:00 +0230"
+	export GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
+}
+
+setup
+
+test_expect_success 'encoding' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -m "add älphà" &&
+
+	export GIT_AUTHOR_NAME="tést èncödîng" &&
+	echo beta > beta &&
+	git add beta &&
+	git commit -m "add beta" &&
+
+	echo gamma > gamma &&
+	git add gamma &&
+	git commit -m "add gämmâ" &&
+
+	: TODO git config i18n.commitencoding latin-1 &&
+	echo delta > delta &&
+	git add delta &&
+	git commit -m "add déltà"
+	) &&
+
+	hg_clone gitrepo hgrepo &&
+	git_clone hgrepo gitrepo2 &&
+	hg_clone gitrepo2 hgrepo2 &&
+
+	HGENCODING=utf-8 hg_log hgrepo > expected &&
+	HGENCODING=utf-8 hg_log hgrepo2 > actual &&
+
+	test_cmp expected actual
+'
+
+test_expect_success 'file removal' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -m "add alpha" &&
+	echo beta > beta &&
+	git add beta &&
+	git commit -m "add beta"
+	mkdir foo &&
+	echo blah > foo/bar &&
+	git add foo &&
+	git commit -m "add foo" &&
+	git rm alpha &&
+	git commit -m "remove alpha" &&
+	git rm foo/bar &&
+	git commit -m "remove foo/bar"
+	) &&
+
+	hg_clone gitrepo hgrepo &&
+	git_clone hgrepo gitrepo2 &&
+	hg_clone gitrepo2 hgrepo2 &&
+
+	hg_log hgrepo > expected &&
+	hg_log hgrepo2 > actual &&
+
+	test_cmp expected actual
+'
+
+test_expect_success 'git tags' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+	git config receive.denyCurrentBranch ignore &&
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -m "add alpha" &&
+	git tag alpha &&
+
+	echo beta > beta &&
+	git add beta &&
+	git commit -m "add beta" &&
+	git tag -a -m "added tag beta" beta
+	) &&
+
+	hg_clone gitrepo hgrepo &&
+	git_clone hgrepo gitrepo2 &&
+	hg_clone gitrepo2 hgrepo2 &&
+
+	hg_log hgrepo > expected &&
+	hg_log hgrepo2 > actual &&
+
+	test_cmp expected actual
+'
+
+test_expect_success 'hg branch' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -q -m "add alpha" &&
+	git checkout -q -b not-master
+	) &&
+
+	(
+	hg_clone gitrepo hgrepo &&
+
+	cd hgrepo &&
+	hg -q co master &&
+	hg mv alpha beta &&
+	hg -q commit -m "rename alpha to beta" &&
+	hg branch gamma | grep -v "permanent and global" &&
+	hg -q commit -m "started branch gamma"
+	) &&
+
+	hg_push hgrepo gitrepo &&
+	hg_clone gitrepo hgrepo2 &&
+
+	: TODO, avoid "master" bookmark &&
+	(cd hgrepo2 && hg checkout gamma) &&
+
+	hg_log hgrepo > expected &&
+	hg_log hgrepo2 > actual &&
+
+	test_cmp expected actual
+'
+
+test_expect_success 'hg tags' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -m "add alpha" &&
+	git checkout -q -b not-master
+	) &&
+
+	(
+	hg_clone gitrepo hgrepo &&
+
+	cd hgrepo &&
+	hg co master &&
+	hg tag alpha
+	) &&
+
+	hg_push hgrepo gitrepo &&
+	hg_clone gitrepo hgrepo2 &&
+
+	hg_log hgrepo > expected &&
+	hg_log hgrepo2 > actual &&
+
+	test_cmp expected actual
+'
+
+test_done
diff --git a/contrib/remote-helpers/test-hg-hg-git.sh b/contrib/remote-helpers/test-hg-hg-git.sh
new file mode 100755
index 0000000000..7e3967f5b6
--- /dev/null
+++ b/contrib/remote-helpers/test-hg-hg-git.sh
@@ -0,0 +1,534 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+# Base commands from hg-git tests:
+# https://bitbucket.org/durin42/hg-git/src
+#
+
+test_description='Test remote-hg output compared to hg-git'
+
+. ./test-lib.sh
+
+if ! test_have_prereq PYTHON; then
+	skip_all='skipping remote-hg tests; python not available'
+	test_done
+fi
+
+if ! "$PYTHON_PATH" -c 'import mercurial'; then
+	skip_all='skipping remote-hg tests; mercurial not available'
+	test_done
+fi
+
+if ! "$PYTHON_PATH" -c 'import hggit'; then
+	skip_all='skipping remote-hg tests; hg-git not available'
+	test_done
+fi
+
+# clone to a git repo with git
+git_clone_git () {
+	hg -R $1 bookmark -f -r tip master &&
+	git clone -q "hg::$PWD/$1" $2
+}
+
+# clone to an hg repo with git
+hg_clone_git () {
+	(
+	hg init $2 &&
+	cd $1 &&
+	git push -q "hg::$PWD/../$2" 'refs/tags/*:refs/tags/*' 'refs/heads/*:refs/heads/*'
+	) &&
+
+	(cd $2 && hg -q update)
+}
+
+# clone to a git repo with hg
+git_clone_hg () {
+	(
+	git init -q $2 &&
+	cd $1 &&
+	hg bookmark -f -r tip master &&
+	hg -q push -r master ../$2 || true
+	)
+}
+
+# clone to an hg repo with hg
+hg_clone_hg () {
+	hg -q clone $1 $2
+}
+
+# push an hg repo with git
+hg_push_git () {
+	(
+	cd $2
+	old=$(git symbolic-ref --short HEAD)
+	git checkout -q -b tmp &&
+	git fetch -q "hg::$PWD/../$1" 'refs/tags/*:refs/tags/*' 'refs/heads/*:refs/heads/*' &&
+	git checkout -q $old &&
+	git branch -q -D tmp 2> /dev/null || true
+	)
+}
+
+# push an hg git repo with hg
+hg_push_hg () {
+	(
+	cd $1 &&
+	hg -q push ../$2 || true
+	)
+}
+
+hg_log () {
+	hg -R $1 log --graph --debug | grep -v 'tag: *default/'
+}
+
+git_log () {
+	git --git-dir=$1/.git fast-export --branches
+}
+
+setup () {
+	(
+	echo "[ui]"
+	echo "username = A U Thor <author@example.com>"
+	echo "[defaults]"
+	echo "backout = -d \"0 0\""
+	echo "commit = -d \"0 0\""
+	echo "debugrawcommit = -d \"0 0\""
+	echo "tag = -d \"0 0\""
+	echo "[extensions]"
+	echo "hgext.bookmarks ="
+	echo "hggit ="
+	) >> "$HOME"/.hgrc &&
+	git config --global receive.denycurrentbranch warn
+	git config --global remote-hg.hg-git-compat true
+
+	export HGEDITOR=/usr/bin/true
+
+	export GIT_AUTHOR_DATE="2007-01-01 00:00:00 +0230"
+	export GIT_COMMITTER_DATE="$GIT_AUTHOR_DATE"
+}
+
+setup
+
+test_expect_success 'executable bit' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+	echo alpha > alpha &&
+	chmod 0644 alpha &&
+	git add alpha &&
+	git commit -m "add alpha" &&
+	chmod 0755 alpha &&
+	git add alpha &&
+	git commit -m "set executable bit" &&
+	chmod 0644 alpha &&
+	git add alpha &&
+	git commit -m "clear executable bit"
+	) &&
+
+	for x in hg git; do
+		(
+		hg_clone_$x gitrepo hgrepo-$x &&
+		cd hgrepo-$x &&
+		hg_log . &&
+		hg manifest -r 1 -v &&
+		hg manifest -v
+		) > output-$x &&
+
+		git_clone_$x hgrepo-$x gitrepo2-$x &&
+		git_log gitrepo2-$x > log-$x
+	done &&
+	cp -r log-* output-* /tmp/foo/ &&
+
+	test_cmp output-hg output-git &&
+	test_cmp log-hg log-git
+'
+
+test_expect_success 'symlink' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -m "add alpha" &&
+	ln -s alpha beta &&
+	git add beta &&
+	git commit -m "add beta"
+	) &&
+
+	for x in hg git; do
+		(
+		hg_clone_$x gitrepo hgrepo-$x &&
+		cd hgrepo-$x &&
+		hg_log . &&
+		hg manifest -v
+		) > output-$x &&
+
+		git_clone_$x hgrepo-$x gitrepo2-$x &&
+		git_log gitrepo2-$x > log-$x
+	done &&
+
+	test_cmp output-hg output-git &&
+	test_cmp log-hg log-git
+'
+
+test_expect_success 'merge conflict 1' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	hg init hgrepo1 &&
+	cd hgrepo1 &&
+	echo A > afile &&
+	hg add afile &&
+	hg ci -m "origin" &&
+
+	echo B > afile &&
+	hg ci -m "A->B" &&
+
+	hg up -r0 &&
+	echo C > afile &&
+	hg ci -m "A->C" &&
+
+	hg merge -r1 || true &&
+	echo C > afile &&
+	hg resolve -m afile &&
+	hg ci -m "merge to C"
+	) &&
+
+	for x in hg git; do
+		git_clone_$x hgrepo1 gitrepo-$x &&
+		hg_clone_$x gitrepo-$x hgrepo2-$x &&
+		hg_log hgrepo2-$x > hg-log-$x &&
+		git_log gitrepo-$x > git-log-$x
+	done &&
+
+	test_cmp hg-log-hg hg-log-git &&
+	test_cmp git-log-hg git-log-git
+'
+
+test_expect_success 'merge conflict 2' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	hg init hgrepo1 &&
+	cd hgrepo1 &&
+	echo A > afile &&
+	hg add afile &&
+	hg ci -m "origin" &&
+
+	echo B > afile &&
+	hg ci -m "A->B" &&
+
+	hg up -r0 &&
+	echo C > afile &&
+	hg ci -m "A->C" &&
+
+	hg merge -r1 || true &&
+	echo B > afile &&
+	hg resolve -m afile &&
+	hg ci -m "merge to B"
+	) &&
+
+	for x in hg git; do
+		git_clone_$x hgrepo1 gitrepo-$x &&
+		hg_clone_$x gitrepo-$x hgrepo2-$x &&
+		hg_log hgrepo2-$x > hg-log-$x &&
+		git_log gitrepo-$x > git-log-$x
+	done &&
+
+	test_cmp hg-log-hg hg-log-git &&
+	test_cmp git-log-hg git-log-git
+'
+
+test_expect_success 'converged merge' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	hg init hgrepo1 &&
+	cd hgrepo1 &&
+	echo A > afile &&
+	hg add afile &&
+	hg ci -m "origin" &&
+
+	echo B > afile &&
+	hg ci -m "A->B" &&
+
+	echo C > afile &&
+	hg ci -m "B->C" &&
+
+	hg up -r0 &&
+	echo C > afile &&
+	hg ci -m "A->C" &&
+
+	hg merge -r2 || true &&
+	hg ci -m "merge"
+	) &&
+
+	for x in hg git; do
+		git_clone_$x hgrepo1 gitrepo-$x &&
+		hg_clone_$x gitrepo-$x hgrepo2-$x &&
+		hg_log hgrepo2-$x > hg-log-$x &&
+		git_log gitrepo-$x > git-log-$x
+	done &&
+
+	test_cmp hg-log-hg hg-log-git &&
+	test_cmp git-log-hg git-log-git
+'
+
+test_expect_success 'encoding' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -m "add älphà" &&
+
+	export GIT_AUTHOR_NAME="tést èncödîng" &&
+	echo beta > beta &&
+	git add beta &&
+	git commit -m "add beta" &&
+
+	echo gamma > gamma &&
+	git add gamma &&
+	git commit -m "add gämmâ" &&
+
+	: TODO git config i18n.commitencoding latin-1 &&
+	echo delta > delta &&
+	git add delta &&
+	git commit -m "add déltà"
+	) &&
+
+	for x in hg git; do
+		hg_clone_$x gitrepo hgrepo-$x &&
+		git_clone_$x hgrepo-$x gitrepo2-$x &&
+
+		HGENCODING=utf-8 hg_log hgrepo-$x > hg-log-$x &&
+		git_log gitrepo2-$x > git-log-$x
+	done &&
+
+	test_cmp hg-log-hg hg-log-git &&
+	test_cmp git-log-hg git-log-git
+'
+
+test_expect_success 'file removal' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -m "add alpha" &&
+	echo beta > beta &&
+	git add beta &&
+	git commit -m "add beta"
+	mkdir foo &&
+	echo blah > foo/bar &&
+	git add foo &&
+	git commit -m "add foo" &&
+	git rm alpha &&
+	git commit -m "remove alpha" &&
+	git rm foo/bar &&
+	git commit -m "remove foo/bar"
+	) &&
+
+	for x in hg git; do
+		(
+		hg_clone_$x gitrepo hgrepo-$x &&
+		cd hgrepo-$x &&
+		hg_log . &&
+		hg manifest -r 3 &&
+		hg manifest
+		) > output-$x &&
+
+		git_clone_$x hgrepo-$x gitrepo2-$x &&
+		git_log gitrepo2-$x > log-$x
+	done &&
+
+	test_cmp output-hg output-git &&
+	test_cmp log-hg log-git
+'
+
+test_expect_success 'git tags' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	(
+	git init -q gitrepo &&
+	cd gitrepo &&
+	git config receive.denyCurrentBranch ignore &&
+	echo alpha > alpha &&
+	git add alpha &&
+	git commit -m "add alpha" &&
+	git tag alpha &&
+
+	echo beta > beta &&
+	git add beta &&
+	git commit -m "add beta" &&
+	git tag -a -m "added tag beta" beta
+	) &&
+
+	for x in hg git; do
+		hg_clone_$x gitrepo hgrepo-$x &&
+		hg_log hgrepo-$x > log-$x
+	done &&
+
+	test_cmp log-hg log-git
+'
+
+test_expect_success 'hg author' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	for x in hg git; do
+		(
+		git init -q gitrepo-$x &&
+		cd gitrepo-$x &&
+
+		echo alpha > alpha &&
+		git add alpha &&
+		git commit -m "add alpha" &&
+		git checkout -q -b not-master
+		) &&
+
+		(
+		hg_clone_$x gitrepo-$x hgrepo-$x &&
+		cd hgrepo-$x &&
+
+		hg co master &&
+		echo beta > beta &&
+		hg add beta &&
+		hg commit -u "test" -m "add beta" &&
+
+		echo gamma >> beta &&
+		hg commit -u "test <test@example.com> (comment)" -m "modify beta" &&
+
+		echo gamma > gamma &&
+		hg add gamma &&
+		hg commit -u "<test@example.com>" -m "add gamma" &&
+
+		echo delta > delta &&
+		hg add delta &&
+		hg commit -u "name<test@example.com>" -m "add delta" &&
+
+		echo epsilon > epsilon &&
+		hg add epsilon &&
+		hg commit -u "name <test@example.com" -m "add epsilon" &&
+
+		echo zeta > zeta &&
+		hg add zeta &&
+		hg commit -u " test " -m "add zeta" &&
+
+		echo eta > eta &&
+		hg add eta &&
+		hg commit -u "test < test@example.com >" -m "add eta" &&
+
+		echo theta > theta &&
+		hg add theta &&
+		hg commit -u "test >test@example.com>" -m "add theta" &&
+
+		echo iota > iota &&
+		hg add iota &&
+		hg commit -u "test <test <at> example <dot> com>" -m "add iota"
+		) &&
+
+		hg_push_$x hgrepo-$x gitrepo-$x &&
+		hg_clone_$x gitrepo-$x hgrepo2-$x &&
+
+		hg_log hgrepo2-$x > hg-log-$x &&
+		git_log gitrepo-$x > git-log-$x
+	done &&
+
+	test_cmp git-log-hg git-log-git &&
+
+	test_cmp hg-log-hg hg-log-git &&
+	test_cmp git-log-hg git-log-git
+'
+
+test_expect_success 'hg branch' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	for x in hg git; do
+		(
+		git init -q gitrepo-$x &&
+		cd gitrepo-$x &&
+
+		echo alpha > alpha &&
+		git add alpha &&
+		git commit -q -m "add alpha" &&
+		git checkout -q -b not-master
+		) &&
+
+		(
+		hg_clone_$x gitrepo-$x hgrepo-$x &&
+
+		cd hgrepo-$x &&
+		hg -q co master &&
+		hg mv alpha beta &&
+		hg -q commit -m "rename alpha to beta" &&
+		hg branch gamma | grep -v "permanent and global" &&
+		hg -q commit -m "started branch gamma"
+		) &&
+
+		hg_push_$x hgrepo-$x gitrepo-$x &&
+		hg_clone_$x gitrepo-$x hgrepo2-$x &&
+
+		hg_log hgrepo2-$x > hg-log-$x &&
+		git_log gitrepo-$x > git-log-$x
+	done &&
+
+	test_cmp hg-log-hg hg-log-git &&
+	test_cmp git-log-hg git-log-git
+'
+
+test_expect_success 'hg tags' '
+	mkdir -p tmp && cd tmp &&
+	test_when_finished "cd .. && rm -rf tmp" &&
+
+	for x in hg git; do
+		(
+		git init -q gitrepo-$x &&
+		cd gitrepo-$x &&
+
+		echo alpha > alpha &&
+		git add alpha &&
+		git commit -m "add alpha" &&
+		git checkout -q -b not-master
+		) &&
+
+		(
+		hg_clone_$x gitrepo-$x hgrepo-$x &&
+
+		cd hgrepo-$x &&
+		hg co master &&
+		hg tag alpha
+		) &&
+
+		hg_push_$x hgrepo-$x gitrepo-$x &&
+		hg_clone_$x gitrepo-$x hgrepo2-$x &&
+
+		(
+		git --git-dir=gitrepo-$x/.git tag -l &&
+		hg_log hgrepo2-$x &&
+		cat hgrepo2-$x/.hgtags
+		) > output-$x
+	done &&
+
+	test_cmp output-hg output-git
+'
+
+test_done
diff --git a/contrib/remote-helpers/test-hg.sh b/contrib/remote-helpers/test-hg.sh
new file mode 100755
index 0000000000..5f81dfae6c
--- /dev/null
+++ b/contrib/remote-helpers/test-hg.sh
@@ -0,0 +1,121 @@
+#!/bin/sh
+#
+# Copyright (c) 2012 Felipe Contreras
+#
+# Base commands from hg-git tests:
+# https://bitbucket.org/durin42/hg-git/src
+#
+
+test_description='Test remote-hg'
+
+. ./test-lib.sh
+
+if ! test_have_prereq PYTHON; then
+	skip_all='skipping remote-hg tests; python not available'
+	test_done
+fi
+
+if ! "$PYTHON_PATH" -c 'import mercurial'; then
+	skip_all='skipping remote-hg tests; mercurial not available'
+	test_done
+fi
+
+check () {
+	(cd $1 &&
+	git log --format='%s' -1 &&
+	git symbolic-ref HEAD) > actual &&
+	(echo $2 &&
+	echo "refs/heads/$3") > expected &&
+	test_cmp expected actual
+}
+
+setup () {
+	(
+	echo "[ui]"
+	echo "username = H G Wells <wells@example.com>"
+	) >> "$HOME"/.hgrc
+}
+
+setup
+
+test_expect_success 'cloning' '
+  test_when_finished "rm -rf gitrepo*" &&
+
+  (
+  hg init hgrepo &&
+  cd hgrepo &&
+  echo zero > content &&
+  hg add content &&
+  hg commit -m zero
+  ) &&
+
+  git clone "hg::$PWD/hgrepo" gitrepo &&
+  check gitrepo zero master
+'
+
+test_expect_success 'cloning with branches' '
+  test_when_finished "rm -rf gitrepo*" &&
+
+  (
+  cd hgrepo &&
+  hg branch next &&
+  echo next > content &&
+  hg commit -m next
+  ) &&
+
+  git clone "hg::$PWD/hgrepo" gitrepo &&
+  check gitrepo next next &&
+
+  (cd hgrepo && hg checkout default) &&
+
+  git clone "hg::$PWD/hgrepo" gitrepo2 &&
+  check gitrepo2 zero master
+'
+
+test_expect_success 'cloning with bookmarks' '
+  test_when_finished "rm -rf gitrepo*" &&
+
+  (
+  cd hgrepo &&
+  hg bookmark feature-a &&
+  echo feature-a > content &&
+  hg commit -m feature-a
+  ) &&
+
+  git clone "hg::$PWD/hgrepo" gitrepo &&
+  check gitrepo feature-a feature-a
+'
+
+test_expect_success 'cloning with detached head' '
+  test_when_finished "rm -rf gitrepo*" &&
+
+  (
+  cd hgrepo &&
+  hg update -r 0
+  ) &&
+
+  git clone "hg::$PWD/hgrepo" gitrepo &&
+  check gitrepo zero master
+'
+
+test_expect_success 'update bookmark' '
+  test_when_finished "rm -rf gitrepo*" &&
+
+  (
+  cd hgrepo &&
+  hg bookmark devel
+  ) &&
+
+  (
+  git clone "hg::$PWD/hgrepo" gitrepo &&
+  cd gitrepo &&
+  git checkout devel &&
+  echo devel > content &&
+  git commit -a -m devel &&
+  git push
+  ) &&
+
+  hg -R hgrepo bookmarks | grep "devel\s\+3:"
+'
+
+test_done