/brz/remove-bazaar

# Copyright (C) 2009-2018 Jelmer Vernooij <jelmer@jelmer.uk>

# Copyright (C) 2006-2009 Canonical Ltd

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

#          Jelmer Vernooij <jelmer@jelmer.uk>

#          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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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

import os

import sys

dulwich_minimum_version = (0, 19, 11)

from .. import (  # noqa: F401

    __version__ as breezy_version,

    errors as brz_errors,

    trace,

    urlutils,

    version_info,

    )

from ..controldir import (

    ControlDirFormat,

    Prober,

    format_registry,

    network_format_registry as controldir_network_format_registry,

    )

from ..transport import (

    register_lazy_transport,

    register_transport_proto,

    transport_server_registry,

    )

from ..commands import (

    plugin_cmds,

    )

if getattr(sys, "frozen", None):

    # allow import additional libs from ./_lib for bzr.exe only

    sys.path.append(os.path.normpath(

        os.path.join(os.path.dirname(__file__), '_lib')))

def import_dulwich():

    try:

        from dulwich import __version__ as dulwich_version

    except ImportError:

        raise brz_errors.DependencyNotPresent(

            "dulwich",

            "bzr-git: Please install dulwich, https://www.dulwich.io/")

    else:

        if dulwich_version < dulwich_minimum_version:

            raise brz_errors.DependencyNotPresent(

                "dulwich",

                "bzr-git: Dulwich is too old; at least %d.%d.%d is required" %

                dulwich_minimum_version)

_versions_checked = False

def lazy_check_versions():

    global _versions_checked

    if _versions_checked:

        return

    import_dulwich()

    _versions_checked = True

format_registry.register_lazy(

    'git', __name__ + ".dir", "LocalGitControlDirFormat",

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

format_registry.register_lazy(

    'git-bare', __name__ + ".dir", "BareLocalGitControlDirFormat",

    help='Bare GIT repository (no working tree).', native=False,

    experimental=False)

from ..revisionspec import (RevisionSpec_dwim, revspec_registry)

revspec_registry.register_lazy("git:", __name__ + ".revspec",

                               "RevisionSpec_git")

RevisionSpec_dwim.append_possible_lazy_revspec(

    __name__ + ".revspec", "RevisionSpec_git")

class LocalGitProber(Prober):

    @classmethod

    def priority(klass, transport):

        return 10

    def probe_transport(self, transport):

        try:

            external_url = transport.external_url()

        except brz_errors.InProcessTransport:

            raise brz_errors.NotBranchError(path=transport.base)

        if (external_url.startswith("http:") or

                external_url.startswith("https:")):

            # Already handled by RemoteGitProber

            raise brz_errors.NotBranchError(path=transport.base)

        if urlutils.split(transport.base)[1] == ".git":

            raise brz_errors.NotBranchError(path=transport.base)

        if not transport.has_any(['objects', '.git/objects', '.git']):

            raise brz_errors.NotBranchError(path=transport.base)

        lazy_check_versions()

        from .dir import (

            BareLocalGitControlDirFormat,

            LocalGitControlDirFormat,

            )

        if transport.has_any(['.git/objects', '.git']):

            return LocalGitControlDirFormat()

        if transport.has('info') and transport.has('objects'):

            return BareLocalGitControlDirFormat()

        raise brz_errors.NotBranchError(path=transport.base)

    @classmethod

    def known_formats(cls):

        from .dir import (

            BareLocalGitControlDirFormat,

            LocalGitControlDirFormat,

            )

        return [BareLocalGitControlDirFormat(), LocalGitControlDirFormat()]

def user_agent_for_github():

    # GitHub requires we lie. https://github.com/dulwich/dulwich/issues/562

    return "git/Breezy/%s" % breezy_version

def is_github_url(url):

    (scheme, user, password, host, port,

     path) = urlutils.parse_url(url)

    return host in ("github.com", "gopkg.in")

class RemoteGitProber(Prober):

    @classmethod

    def priority(klass, transport):

        # This is a surprisingly good heuristic to determine whether this

        # prober is more likely to succeed than the Bazaar one.

        if 'git' in transport.base:

            return -15

        return -10

    def probe_http_transport(self, transport):

        # This function intentionally doesn't use any of the support code under

        # breezy.git, since it's called for every repository that's

        # accessed over HTTP, whether it's Git, Bzr or something else.

        # Importing Dulwich and the other support code adds unnecessray slowdowns.

        base_url = urlutils.strip_segment_parameters(transport.external_url())

        url = urlutils.URL.from_string(base_url)

        url.user = url.quoted_user = None

        url.password = url.quoted_password = None

        host = url.host

        url = urlutils.join(str(url), "info/refs") + "?service=git-upload-pack"

        headers = {"Content-Type": "application/x-git-upload-pack-request",

                   "Accept": "application/x-git-upload-pack-result",

                   }

        if is_github_url(url):

            # GitHub requires we lie.

            # https://github.com/dulwich/dulwich/issues/562

            headers["User-Agent"] = user_agent_for_github()

        resp = transport.request('GET', url, headers=headers)

        if resp.status in (404, 405):

            raise brz_errors.NotBranchError(transport.base)

        elif resp.status == 400 and resp.reason == 'no such method: info':

            # hgweb :(

            raise brz_errors.NotBranchError(transport.base)

        elif resp.status != 200:

            raise brz_errors.UnexpectedHttpStatus(url, resp.status)

        ct = resp.getheader("Content-Type")

        if ct and ct.startswith("application/x-git"):

            from .remote import RemoteGitControlDirFormat

            return RemoteGitControlDirFormat()

        elif not ct:

            from .dir import (

                BareLocalGitControlDirFormat,

                )

            ret = BareLocalGitControlDirFormat()

            ret._refs_text = resp.read()

            return ret

        raise brz_errors.NotBranchError(transport.base)

    def probe_transport(self, transport):

        try:

            external_url = transport.external_url()

        except brz_errors.InProcessTransport:

            raise brz_errors.NotBranchError(path=transport.base)

        if (external_url.startswith("http:") or

                external_url.startswith("https:")):

            return self.probe_http_transport(transport)

        if (not external_url.startswith("git://") and

                not external_url.startswith("git+")):

            raise brz_errors.NotBranchError(transport.base)

        # little ugly, but works

        from .remote import (

            GitSmartTransport,

            RemoteGitControlDirFormat,

            )

        if isinstance(transport, GitSmartTransport):

            return RemoteGitControlDirFormat()

        raise brz_errors.NotBranchError(path=transport.base)

    @classmethod

    def known_formats(cls):

        from .remote import RemoteGitControlDirFormat

        return [RemoteGitControlDirFormat()]

ControlDirFormat.register_prober(LocalGitProber)

ControlDirFormat.register_prober(RemoteGitProber)

register_transport_proto(

    'git://', help="Access using the Git smart server protocol.")

register_transport_proto(

    'git+ssh://',

    help="Access using the Git smart server protocol over SSH.")

register_lazy_transport("git://", __name__ + '.remote',

                        'TCPGitSmartTransport')

register_lazy_transport("git+ssh://", __name__ + '.remote',

                        'SSHGitSmartTransport')

plugin_cmds.register_lazy("cmd_git_import", [], __name__ + ".commands")

plugin_cmds.register_lazy("cmd_git_object", ["git-objects", "git-cat"],

                          __name__ + ".commands")

plugin_cmds.register_lazy("cmd_git_refs", [], __name__ + ".commands")

plugin_cmds.register_lazy("cmd_git_apply", [], __name__ + ".commands")

plugin_cmds.register_lazy("cmd_git_push_pristine_tar_deltas",

                          ['git-push-pristine-tar', 'git-push-pristine'],

                          __name__ + ".commands")

def extract_git_foreign_revid(rev):

    try:

        foreign_revid = rev.foreign_revid

    except AttributeError:

        from .mapping import mapping_registry

        foreign_revid, mapping = \

            mapping_registry.parse_revision_id(rev.revision_id)

        return foreign_revid

    else:

        from .mapping import foreign_vcs_git

        if rev.mapping.vcs == foreign_vcs_git:

            return foreign_revid

        else:

            raise brz_errors.InvalidRevisionId(rev.revision_id, None)

def update_stanza(rev, stanza):

    try:

        git_commit = extract_git_foreign_revid(rev)

    except brz_errors.InvalidRevisionId:

        pass

    else:

        stanza.add("git-commit", git_commit)

from ..hooks import install_lazy_named_hook

install_lazy_named_hook(

    "breezy.version_info_formats.format_rio",

    "RioVersionInfoBuilder.hooks", "revision", update_stanza,

    "git commits")

transport_server_registry.register_lazy(

    'git', __name__ + '.server', 'serve_git',

    'Git Smart server protocol over TCP. (default port: 9418)')

transport_server_registry.register_lazy(

    'git-receive-pack', __name__ + '.server',

    'serve_git_receive_pack',

    help='Git Smart server receive pack command. (inetd mode only)')

transport_server_registry.register_lazy(

    'git-upload-pack', __name__ + 'git.server',

    'serve_git_upload_pack',

    help='Git Smart server upload pack command. (inetd mode only)')

from ..repository import (

    format_registry as repository_format_registry,

    network_format_registry as repository_network_format_registry,

    )

repository_network_format_registry.register_lazy(

    b'git', __name__ + '.repository', 'GitRepositoryFormat')

register_extra_lazy_repository_format = getattr(repository_format_registry,

                                                "register_extra_lazy")

register_extra_lazy_repository_format(__name__ + '.repository',

                                      'GitRepositoryFormat')

from ..branch import (

    network_format_registry as branch_network_format_registry,

    )

branch_network_format_registry.register_lazy(

    b'git', __name__ + '.branch', 'LocalGitBranchFormat')

from ..branch import (

    format_registry as branch_format_registry,

    )

branch_format_registry.register_extra_lazy(

    __name__ + '.branch',

    'LocalGitBranchFormat',

    )

branch_format_registry.register_extra_lazy(

    __name__ + '.remote',

    'RemoteGitBranchFormat',

    )

from ..workingtree import (

    format_registry as workingtree_format_registry,

    )

workingtree_format_registry.register_extra_lazy(

    __name__ + '.workingtree',

    'GitWorkingTreeFormat',

    )

controldir_network_format_registry.register_lazy(

    b'git', __name__ + ".dir", "GitControlDirFormat")

from ..diff import format_registry as diff_format_registry

diff_format_registry.register_lazy(

    'git', __name__ + '.send',

    'GitDiffTree', 'Git am-style diff format')

from ..send import (

    format_registry as send_format_registry,

    )

send_format_registry.register_lazy('git', __name__ + '.send',

                                   'send_git', 'Git am-style diff format')

from ..directory_service import directories

directories.register_lazy('github:', __name__ + '.directory',

                          'GitHubDirectory',

                          'GitHub directory.')

directories.register_lazy('git@github.com:', __name__ + '.directory',

                          'GitHubDirectory',

                          'GitHub directory.')

from ..help_topics import (

    topic_registry,

    )

topic_registry.register_lazy(

    'git', __name__ + '.help', 'help_git', 'Using Bazaar with Git')

from ..foreign import (

    foreign_vcs_registry,

    )

foreign_vcs_registry.register_lazy(

    "git", __name__ + ".mapping", "foreign_vcs_git", "Stupid content tracker")

def update_git_cache(repository, revid):

    """Update the git cache after a local commit."""

    if getattr(repository, "_git", None) is not None:

        return  # No need to update cache for git repositories

    if not repository.control_transport.has("git"):

        return  # No existing cache, don't bother updating

    try:

        lazy_check_versions()

    except brz_errors.DependencyNotPresent as e:

        # dulwich is probably missing. silently ignore

        trace.mutter("not updating git map for %r: %s",

                     repository, e)

    from .object_store import BazaarObjectStore

    store = BazaarObjectStore(repository)

    with store.lock_write():

        try:

            parent_revisions = set(repository.get_parent_map([revid])[revid])

        except KeyError:

            # Isn't this a bit odd - how can a revision that was just committed

            # be missing?

            return

        missing_revisions = store._missing_revisions(parent_revisions)

        if not missing_revisions:

            store._cache.idmap.start_write_group()

            try:

                # Only update if the cache was up to date previously

                store._update_sha_map_revision(revid)

            except BaseException:

                store._cache.idmap.abort_write_group()

                raise

            else:

                store._cache.idmap.commit_write_group()

def post_commit_update_cache(local_branch, master_branch, old_revno, old_revid,

                             new_revno, new_revid):

    if local_branch is not None:

        update_git_cache(local_branch.repository, new_revid)

    update_git_cache(master_branch.repository, new_revid)

def loggerhead_git_hook(branch_app, environ):

    branch = branch_app.branch

    config_stack = branch.get_config_stack()

    if not config_stack.get('git.http'):

        return None

    from .server import git_http_hook

    return git_http_hook(branch, environ['REQUEST_METHOD'],

                         environ['PATH_INFO'])

install_lazy_named_hook("breezy.branch",

                        "Branch.hooks", "post_commit",

                        post_commit_update_cache, "git cache")

install_lazy_named_hook("breezy.plugins.loggerhead.apps.branch",

                        "BranchWSGIApp.hooks", "controller",

                        loggerhead_git_hook, "git support")

from ..config import (

    option_registry,

    Option,

    bool_from_store,

    )

option_registry.register(

    Option('git.http',

           default=None, from_unicode=bool_from_store, invalid='warning',

           help='''\

Allow fetching of Git packs over HTTP.

This enables support for fetching Git packs over HTTP in Loggerhead.

'''))

def test_suite():

    from . import tests

    return tests.test_suite()