/brz/remove-bazaar

# Copyright (C) 2007-2008 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import bzrlib

from bzrlib import urlutils

from bzrlib.bzrdir import BzrDir, BzrDirFormat

from bzrlib.errors import BzrError, NoSuchFile, NotLocalUrl

from bzrlib.lockable_files import TransportLock

from bzrlib.repository import Repository

from bzrlib.trace import info

from bzrlib.transport import Transport

from bzrlib.plugins.git import lazy_check_versions

lazy_check_versions()

from bzrlib.plugins.git.branch import GitBranch

from bzrlib.plugins.git.errors import NoSuchRef

from bzrlib.plugins.git.dir import GitDir

from bzrlib.plugins.git.foreign import ForeignBranch

from bzrlib.plugins.git.repository import GitFormat, GitRepository

import os

import tempfile

import urllib

import urlparse

import dulwich as git

from dulwich.errors import GitProtocolError

from dulwich.pack import PackData, Pack, PackIndex

# Don't run any tests on GitSmartTransport as it is not intended to be 

# a full implementation of Transport

def get_test_permutations():

    return []

class GitSmartTransport(Transport):

    def __init__(self, url, _client=None):

        Transport.__init__(self, url)

        (scheme, _, loc, _, _) = urlparse.urlsplit(url)

        assert scheme == "git"

        hostport, self._path = urllib.splithost(loc)

        (self._host, self._port) = urllib.splitnport(hostport, git.protocol.TCP_GIT_PORT)

        self._client = _client

    def has(self, relpath):

        return False

    def _get_client(self):

        if self._client is not None:

            ret = self._client

            self._client = None

            return ret

        return git.client.TCPGitClient(self._host, self._port, 

            capabilities=["multi_ack", "side-band-64k", "ofs-delta", "side-band"])

    def fetch_pack(self, determine_wants, graph_walker, pack_data, progress=None):

        if progress is None:

            def progress(text):

                info("git: %s" % text)

        client = self._get_client()

        try:

            client.fetch_pack(self._path, determine_wants, 

                graph_walker, pack_data, progress)

        except GitProtocolError, e:

            raise BzrError(e)

    def get(self, path):

        raise NoSuchFile(path)

    def abspath(self, relpath):

        return urlutils.join(self.base, relpath)

    def clone(self, offset=None):

        """See Transport.clone()."""

        if offset is None:

            newurl = self.base

        else:

            newurl = urlutils.join(self.base, offset)

        return GitSmartTransport(newurl, self._client)

class RemoteGitDir(GitDir):

    def __init__(self, transport, lockfiles, format):

        self._format = format

        self.root_transport = transport

        self.transport = transport

        self._lockfiles = lockfiles

    def open_repository(self):

        return RemoteGitRepository(self, self._lockfiles)

    def open_branch(self, _unsupported=False):

        repo = self.open_repository()

        # TODO: Support for multiple branches in one bzrdir in bzrlib!

        return RemoteGitBranch(self, repo, "HEAD", self._lockfiles)

    def open_workingtree(self):

        raise NotLocalUrl(self.transport.base)

class EmptyObjectStoreIterator(dict):

    def iterobjects(self):

        return []

class TemporaryPackIterator(Pack):

    def __init__(self, path, resolve_ext_ref):

        self.resolve_ext_ref = resolve_ext_ref

        super(TemporaryPackIterator, self).__init__(path)

    @property

    def idx(self):

        if self._idx is None:

            self._data.create_index_v2(self._idx_path, self.resolve_ext_ref)

            self._idx = PackIndex(self._idx_path)

        return self._idx

    def __del__(self):

        os.remove(self._data_path)

        os.remove(self._idx_path)

class RemoteGitRepository(GitRepository):

    def __init__(self, gitdir, lockfiles):

        GitRepository.__init__(self, gitdir, lockfiles)

    def fetch_pack(self, determine_wants, graph_walker, pack_data, 

                   progress=None):

        self._transport.fetch_pack(determine_wants, graph_walker, pack_data, 

            progress)

    def fetch_objects(self, determine_wants, graph_walker, resolve_ext_ref, progress=None):

        fd, path = tempfile.mkstemp(suffix=".pack")

        self.fetch_pack(determine_wants, graph_walker, lambda x: os.write(fd, x), progress)

        os.close(fd)

        if os.path.getsize(path) == 0:

            return EmptyObjectStoreIterator()

        return TemporaryPackIterator(path[:-len(".pack")], resolve_ext_ref)

class RemoteGitBranch(GitBranch):

    def __init__(self, bzrdir, repository, name, lockfiles):

        def determine_wants(heads):

            if not name in heads:

                raise NoSuchRef(name)

            self._ref = heads[name]

        bzrdir.root_transport.fetch_pack(determine_wants, None, lambda x: None, 

                             lambda x: mutter("git: %s" % x))

        super(RemoteGitBranch, self).__init__(bzrdir, repository, name, self._ref, lockfiles)

    def last_revision(self):

        return self.mapping.revision_id_foreign_to_bzr(self._ref)

    def _synchronize_history(self, destination, revision_id):

        """See Branch._synchronize_history()."""

        destination.generate_revision_history(self.last_revision())