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remote.py
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# Copyright (C) 2007-2008 Canonical Ltd
 
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# Copyright (C) 2007-2009 Jelmer Vernooij <jelmer@samba.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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import bzrlib
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from bzrlib import urlutils
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from bzrlib.bzrdir import BzrDir, BzrDirFormat
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from bzrlib.errors import NoSuchFile, NotLocalUrl
 
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from bzrlib.errors import BzrError, NoSuchFile, NotLocalUrl
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from bzrlib.lockable_files import TransportLock
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from bzrlib.repository import Repository
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from bzrlib.trace import info
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from bzrlib.transport import Transport
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from bzrlib.plugins.git import git
 
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from bzrlib.plugins.git import lazy_check_versions
 
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lazy_check_versions()
 
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from bzrlib.plugins.git.branch import GitBranch
 
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from bzrlib.plugins.git.errors import NoSuchRef
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from bzrlib.plugins.git.dir import GitDir
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from bzrlib.plugins.git.foreign import ForeignBranch
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from bzrlib.plugins.git.repository import GitFormat, GitRepository
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import os
 
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import tempfile
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import urllib
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import urlparse
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from dulwich.pack import PackData
 
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import dulwich as git
 
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from dulwich.errors import GitProtocolError
 
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from dulwich.pack import PackData, Pack, PackIndex
 
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# Don't run any tests on GitSmartTransport as it is not intended to be 
 
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# a full implementation of Transport
 
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def get_test_permutations():
 
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    return []
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class GitSmartTransport(Transport):
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        assert scheme == "git"
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        hostport, self._path = urllib.splithost(loc)
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        (self._host, self._port) = urllib.splitnport(hostport, git.protocol.TCP_GIT_PORT)
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        if _client is not None:
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            self._client = _client
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        else:
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            self._client = git.client.TCPGitClient(self._host, self._port)
 
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        self._client = _client
 
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    def has(self, relpath):
 
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        return False
 
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    def _get_client(self):
 
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        if self._client is not None:
 
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            ret = self._client
 
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            self._client = None
 
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            return ret
 
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        return git.client.TCPGitClient(self._host, self._port, thin_packs=False)
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    def fetch_pack(self, determine_wants, graph_walker, pack_data, progress=None):
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        if progress is None:
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            def progress(text):
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                info("git: %s" % text)
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        self._client.fetch_pack(self._path, determine_wants, graph_walker, 
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                pack_data, progress)
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    def fetch_objects(self, determine_wants, graph_walker, progress=None):
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        fd, path = tempfile.mkstemp(dir=self.pack_dir(), suffix=".pack")
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        self.fetch_pack(determine_wants, graph_walker, lambda x: os.write(fd, x), progress)
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        os.close(fd)
 
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        client = self._get_client()
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        try:
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            p = PackData(path)
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            for o in p.iterobjects():
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                yield o
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        finally:
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            os.remove(path)
 
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            client.fetch_pack(self._path, determine_wants, 
 
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                graph_walker, pack_data, progress)
 
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        except GitProtocolError, e:
 
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            raise BzrError(e)
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    def get(self, path):
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        raise NoSuchFile(path)
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    def abspath(self, relpath):
 
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        return urlutils.join(self.base, relpath)
 
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    def clone(self, offset=None):
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        """See Transport.clone()."""
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        if offset is None:
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    def open_repository(self):
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        return RemoteGitRepository(self, self._lockfiles)
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    def open_branch(self):
 
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    def open_branch(self, _unsupported=False):
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        repo = self.open_repository()
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        # TODO: Support for multiple branches in one bzrdir in bzrlib!
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        return RemoteGitBranch(self, repo, "HEAD", self._lockfiles)
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        raise NotLocalUrl(self.transport.base)
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class EmptyObjectStoreIterator(dict):
 
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    def iterobjects(self):
 
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        return []
 
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class TemporaryPackIterator(Pack):
 
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    def __init__(self, path, resolve_ext_ref):
 
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        self.resolve_ext_ref = resolve_ext_ref
 
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        super(TemporaryPackIterator, self).__init__(path)
 
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    @property
 
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    def idx(self):
 
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        if self._idx is None:
 
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            self._data.create_index_v2(self._idx_path, self.resolve_ext_ref)
 
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            self._idx = PackIndex(self._idx_path)
 
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        return self._idx
 
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    def __del__(self):
 
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        os.remove(self._data_path)
 
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        os.remove(self._idx_path)
 
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class RemoteGitRepository(GitRepository):
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    def __init__(self, gitdir, lockfiles):
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        self._transport.fetch_pack(determine_wants, graph_walker, pack_data, 
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            progress)
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    def fetch_objects(self, determine_wants, graph_walker, resolve_ext_ref, progress=None):
 
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        fd, path = tempfile.mkstemp(suffix=".pack")
 
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        self.fetch_pack(determine_wants, graph_walker, lambda x: os.write(fd, x), progress)
 
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        os.close(fd)
 
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        if os.path.getsize(path) == 0:
 
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            return EmptyObjectStoreIterator()
 
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        return TemporaryPackIterator(path[:-len(".pack")], resolve_ext_ref)
 
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class RemoteGitBranch(GitBranch):
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    def __init__(self, bzrdir, repository, name, lockfiles):
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        def determine_wants(heads):
 
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            if not name in heads:
 
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                raise NoSuchRef(name)
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            self._ref = heads[name]
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        bzrdir.root_transport.fetch_pack(determine_wants, None, lambda x: None, 
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                             lambda x: mutter("git: %s" % x))
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    def last_revision(self):
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        return self.mapping.revision_id_foreign_to_bzr(self._ref)
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    def _synchronize_history(self, destination, revision_id):
 
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        """See Branch._synchronize_history()."""
 
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        destination.generate_revision_history(self.last_revision())
 
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