/brz/remove-bazaar

# Copyright (C) 2006 Canonical Ltd

# Authors: Robert Collins <robert.collins@canonical.com>

#          Jelmer Vernooij <jelmer@samba.org>

#          John Carr <john.carr@unrouted.co.uk>

#

# 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

"""A GIT branch and repository format implementation for bzr."""

import bzrlib

import bzrlib.api

from bzrlib import bzrdir, errors as bzr_errors

from bzrlib.foreign import foreign_vcs_registry

from bzrlib.lockable_files import TransportLock

from bzrlib.transport import register_lazy_transport

from bzrlib.commands import Command, register_command

from bzrlib.option import Option

from bzrlib.trace import warning

MINIMUM_DULWICH_VERSION = (0, 1, 0)

COMPATIBLE_BZR_VERSIONS = [(1, 11, 0), (1, 12, 0)]

_versions_checked = False

def lazy_check_versions():

    global _versions_checked

    if _versions_checked:

        return

    _versions_checked = True

    try:

        from dulwich import __version__ as dulwich_version

    except ImportError:

        warning("Please install dulwich, https://launchpad.net/dulwich")

        raise

    else:

        if dulwich_version < MINIMUM_DULWICH_VERSION:

            warning("Dulwich is too old; at least %d.%d.%d is required" % MINIMUM_DULWICH_VERSION)

            raise ImportError

bzrlib.api.require_any_api(bzrlib, COMPATIBLE_BZR_VERSIONS)

bzrdir.format_registry.register_lazy('git', 

    "bzrlib.plugins.git.dir", "LocalGitBzrDirFormat",

    help='GIT repository.', native=False, experimental=True,

    )

try:

    from bzrlib.revisionspec import revspec_registry

    revspec_registry.register_lazy("git:", "bzrlib.plugins.git.revspec", 

        "RevisionSpec_git")

except ImportError:

    lazy_check_versions()

    from bzrlib.revisionspec import SPEC_TYPES

    from bzrlib.plugins.git.revspec import RevisionSpec_git

    SPEC_TYPES.append(RevisionSpec_git)

class GitBzrDirFormat(bzrdir.BzrDirFormat):

    _lock_class = TransportLock

    def is_supported(self):

        return True

class LocalGitBzrDirFormat(GitBzrDirFormat):

    """The .git directory control format."""

    @classmethod

    def _known_formats(self):

        return set([LocalGitBzrDirFormat()])

    def open(self, transport, _found=None):

        """Open this directory.

        """

        import dulwich as git

        # we dont grok readonly - git isn't integrated with transport.

        url = transport.base

        if url.startswith('readonly+'):

            url = url[len('readonly+'):]

        try:

            gitrepo = git.repo.Repo(transport.local_abspath("."))

        except bzr_errors.NotLocalUrl:

            raise bzr_errors.NotBranchError(path=transport.base)

        from bzrlib.plugins.git.dir import LocalGitDir, GitLockableFiles, GitLock

        lockfiles = GitLockableFiles(transport, GitLock())

        return LocalGitDir(transport, lockfiles, gitrepo, self)

    @classmethod

    def probe_transport(klass, transport):

        """Our format is present if the transport ends in '.not/'."""

        from bzrlib.transport.local import LocalTransport

        if not isinstance(transport, LocalTransport):

            raise bzr_errors.NotBranchError(path=transport.base)

        # This should quickly filter out most things that are not 

        # git repositories, saving us the trouble from loading dulwich.

        if not transport.has(".git") and not transport.has("objects"):

            raise bzr_errors.NotBranchError(path=transport.base)

        import dulwich as git

        format = klass()

        try:

            format.open(transport)

            return format

        except git.errors.NotGitRepository, e:

            raise bzr_errors.NotBranchError(path=transport.base)

        raise bzr_errors.NotBranchError(path=transport.base)

    def get_format_description(self):

        return "Local Git Repository"

    def get_format_string(self):

        return "Local Git Repository"

    def initialize_on_transport(self, transport):

        from bzrlib.transport.local import LocalTransport

        if not isinstance(transport, LocalTransport):

            raise NotImplementedError(self.initialize, 

                "Can't create Git Repositories/branches on "

                "non-local transports")

        from dulwich.repo import Repo

        Repo.create(transport.local_abspath(".")) 

        return self.open(transport)

    def is_supported(self):

        return True

class RemoteGitBzrDirFormat(GitBzrDirFormat):

    """The .git directory control format."""

    @classmethod

    def _known_formats(self):

        return set([RemoteGitBzrDirFormat()])

    def open(self, transport, _found=None):

        """Open this directory.

        """

        from bzrlib.plugins.git.remote import RemoteGitDir, GitSmartTransport

        if not isinstance(transport, GitSmartTransport):

            raise bzr_errors.NotBranchError(transport.base)

        # we dont grok readonly - git isn't integrated with transport.

        url = transport.base

        if url.startswith('readonly+'):

            url = url[len('readonly+'):]

        from bzrlib.plugins.git.dir import GitLockableFiles, GitLock

        lockfiles = GitLockableFiles(transport, GitLock())

        return RemoteGitDir(transport, lockfiles, self)

    @classmethod

    def probe_transport(klass, transport):

        """Our format is present if the transport ends in '.not/'."""

        # little ugly, but works

        format = klass()

        from bzrlib.plugins.git.remote import GitSmartTransport

        if not isinstance(transport, GitSmartTransport):

            raise bzr_errors.NotBranchError(transport.base)

        # The only way to know a path exists and contains a valid repository 

        # is to do a request against it:

        try:

            transport.fetch_pack(lambda x: [], None, lambda x: None, 

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

        except errors.git_errors.GitProtocolError:

            raise bzr_errors.NotBranchError(path=transport.base)

        else:

            return format

        raise bzr_errors.NotBranchError(path=transport.base)

    def get_format_description(self):

        return "Remote Git Repository"

    def get_format_string(self):

        return "Remote Git Repository"

    def initialize_on_transport(self, transport):

        raise bzr_errors.UninitializableFormat(self)

bzrdir.BzrDirFormat.register_control_format(LocalGitBzrDirFormat)

bzrdir.BzrDirFormat.register_control_format(RemoteGitBzrDirFormat)

register_lazy_transport("git://", 'bzrlib.plugins.git.remote',

                        'GitSmartTransport')

foreign_vcs_registry.register_lazy("git", 

                        "bzrlib.plugins.git.mapping", 

                        "foreign_git",

                        "Stupid content tracker")

class cmd_git_serve(Command):

    """Provide access to a Bazaar branch using the git protocol.

    This command is experimental and doesn't do much yet.

    """

    takes_options = [

        Option('directory',

               help='serve contents of directory',

               type=unicode)

    ]

    def run(self, directory=None):

        lazy_check_versions()

        from dulwich.server import TCPGitServer

        from bzrlib.plugins.git.server import BzrBackend

        from bzrlib.trace import warning

        import os

        warning("server support in bzr-git is experimental.")

        if directory is None:

            directory = os.getcwd()

        backend = BzrBackend(directory)

        server = TCPGitServer(backend, 'localhost')

        server.serve_forever()

register_command(cmd_git_serve)

class cmd_git_import(Command):

    """Import all branches from a git repository.

    """

    takes_args = ["src_location", "dest_location"]

    def run(self, src_location, dest_location):

        from bzrlib.bzrdir import BzrDir, format_registry

        from bzrlib.errors import NoRepositoryPresent, NotBranchError

        from bzrlib.repository import Repository

        source_repo = Repository.open(src_location)

        format = format_registry.make_bzrdir('rich-root-pack')

        try:

            target_bzrdir = BzrDir.open(dest_location)

        except NotBranchError:

            target_bzrdir = BzrDir.create(dest_location, format=format)

        try:

            target_repo = target_bzrdir.open_repository()

        except NoRepositoryPresent:

            target_repo = target_bzrdir.create_repository(shared=True)

        target_repo.fetch(source_repo)

        for name, ref in source_repo._git.heads().iteritems():

            head_loc = os.path.join(dest_location, name)

            try:

                head_bzrdir = BzrDir.open(head_loc)

            except NotBranchError:

                head_bzrdir = BzrDir.create(head_loc, format=format)

            try:

                head_branch = head_bzrdir.open_branch()

            except NotBranchError:

                head_branch = head_bzrdir.create_branch()

            head_branch.generate_revision_history(source_repo.get_mapping().revision_id_foreign_to_bzr(ref))

register_command(cmd_git_import)

def test_suite():

    from bzrlib.plugins.git import tests

    return tests.test_suite()