# test_client.py -- Tests for the git protocol, client side
# Copyright (C) 2009 Jelmer Vernooij <jelmer@jelmer.uk>
#
# Dulwich is dual-licensed under the Apache License, Version 2.0 and the GNU
# General Public License as public by the Free Software Foundation; version 2.0
# or (at your option) any later version. You can redistribute it and/or
# modify it under the terms of either of these two licenses.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# You should have received a copy of the licenses; if not, see
# <http://www.gnu.org/licenses/> for a copy of the GNU General Public License
# and <http://www.apache.org/licenses/LICENSE-2.0> for a copy of the Apache
# License, Version 2.0.
#

from io import BytesIO
import base64
import sys
import shutil
import tempfile
import warnings

try:
    from urllib import quote as urlquote
except ImportError:
    from urllib.parse import quote as urlquote

try:
    import urlparse
except ImportError:
    import urllib.parse as urlparse

import urllib3

import dulwich
from dulwich import (
    client,
    )
from dulwich.client import (
    InvalidWants,
    LocalGitClient,
    TraditionalGitClient,
    TCPGitClient,
    SSHGitClient,
    HttpGitClient,
    ReportStatusParser,
    SendPackError,
    StrangeHostname,
    SubprocessSSHVendor,
    PLinkSSHVendor,
    UpdateRefsError,
    check_wants,
    default_urllib3_manager,
    get_transport_and_path,
    get_transport_and_path_from_url,
    parse_rsync_url,
    )
from dulwich.config import (
    ConfigDict,
    )
from dulwich.tests import (
    TestCase,
    )
from dulwich.protocol import (
    TCP_GIT_PORT,
    Protocol,
    )
from dulwich.pack import (
    pack_objects_to_data,
    write_pack_data,
    write_pack_objects,
    )
from dulwich.objects import (
    Commit,
    Tree
    )
from dulwich.repo import (
    MemoryRepo,
    Repo,
    )
from dulwich.tests import skipIf
from dulwich.tests.utils import (
    open_repo,
    tear_down_repo,
    setup_warning_catcher,
    )


class DummyClient(TraditionalGitClient):

    def __init__(self, can_read, read, write):
        self.can_read = can_read
        self.read = read
        self.write = write
        TraditionalGitClient.__init__(self)

    def _connect(self, service, path):
        return Protocol(self.read, self.write), self.can_read, None


class DummyPopen():

    def __init__(self, *args, **kwards):
        self.stdin = BytesIO(b"stdin")
        self.stdout = BytesIO(b"stdout")
        self.stderr = BytesIO(b"stderr")
        self.returncode = 0
        self.args = args
        self.kwargs = kwards

    def communicate(self, *args, **kwards):
        return ('Running', '')

    def wait(self, *args, **kwards):
        return False


# TODO(durin42): add unit-level tests of GitClient
class GitClientTests(TestCase):

    def setUp(self):
        super(GitClientTests, self).setUp()
        self.rout = BytesIO()
        self.rin = BytesIO()
        self.client = DummyClient(lambda x: True, self.rin.read,
                                  self.rout.write)

    def test_caps(self):
        agent_cap = (
            'agent=dulwich/%d.%d.%d' % dulwich.__version__).encode('ascii')
        self.assertEqual(set([b'multi_ack', b'side-band-64k', b'ofs-delta',
                              b'thin-pack', b'multi_ack_detailed', b'shallow',
                              agent_cap]),
                         set(self.client._fetch_capabilities))
        self.assertEqual(set([b'ofs-delta', b'report-status', b'side-band-64k',
                              agent_cap]),
                         set(self.client._send_capabilities))

    def test_archive_ack(self):
        self.rin.write(
            b'0009NACK\n'
            b'0000')
        self.rin.seek(0)
        self.client.archive(b'bla', b'HEAD', None, None)
        self.assertEqual(self.rout.getvalue(), b'0011argument HEAD0000')

    def test_fetch_empty(self):
        self.rin.write(b'0000')
        self.rin.seek(0)

        def check_heads(heads):
            self.assertEqual(heads, {})
            return []
        ret = self.client.fetch_pack(b'/', check_heads, None, None)
        self.assertEqual({}, ret.refs)
        self.assertEqual({}, ret.symrefs)

    def test_fetch_pack_ignores_magic_ref(self):
        self.rin.write(
            b'00000000000000000000000000000000000000000000 capabilities^{}'
            b'\x00 multi_ack '
            b'thin-pack side-band side-band-64k ofs-delta shallow no-progress '
            b'include-tag\n'
            b'0000')
        self.rin.seek(0)

        def check_heads(heads):
            self.assertEqual({}, heads)
            return []
        ret = self.client.fetch_pack(b'bla', check_heads, None, None, None)
        self.assertEqual({}, ret.refs)
        self.assertEqual({}, ret.symrefs)
        self.assertEqual(self.rout.getvalue(), b'0000')

    def test_fetch_pack_none(self):
        self.rin.write(
            b'008855dcc6bf963f922e1ed5c4bbaaefcfacef57b1d7 HEAD\x00multi_ack '
            b'thin-pack side-band side-band-64k ofs-delta shallow no-progress '
            b'include-tag\n'
            b'0000')
        self.rin.seek(0)
        ret = self.client.fetch_pack(
                b'bla', lambda heads: [], None, None, None)
        self.assertEqual(
                {b'HEAD': b'55dcc6bf963f922e1ed5c4bbaaefcfacef57b1d7'},
                ret.refs)
        self.assertEqual({}, ret.symrefs)
        self.assertEqual(self.rout.getvalue(), b'0000')

    def test_fetch_pack_sha_not_in_ref(self):
        self.rin.write(
            b'008855dcc6bf963f922e1ed5c4bbaaefcfacef57b1d7 HEAD\x00multi_ack '
            b'thin-pack side-band side-band-64k ofs-delta shallow no-progress '
            b'include-tag\n'
            b'0000')
        self.rin.seek(0)
        self.assertRaises(
                InvalidWants, self.client.fetch_pack,
                b'bla',
                lambda heads: ['aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'],
                None, None,
                None)

    def test_send_pack_no_sideband64k_with_update_ref_error(self):
        # No side-bank-64k reported by server shouldn't try to parse
        # side band data
        pkts = [b'55dcc6bf963f922e1ed5c4bbaaefcfacef57b1d7 capabilities^{}'
                b'\x00 report-status delete-refs ofs-delta\n',
                b'',
                b"unpack ok",
                b"ng refs/foo/bar pre-receive hook declined",
                b'']
        for pkt in pkts:
            if pkt == b'':
                self.rin.write(b"0000")
            else:
                self.rin.write(("%04x" % (len(pkt)+4)).encode('ascii') + pkt)
        self.rin.seek(0)

        tree = Tree()
        commit = Commit()
        commit.tree = tree
        commit.parents = []
        commit.author = commit.committer = b'test user'
        commit.commit_time = commit.author_time = 1174773719
        commit.commit_timezone = commit.author_timezone = 0
        commit.encoding = b'UTF-8'
        commit.message = b'test message'

        def update_refs(refs):
            return {b'refs/foo/bar': commit.id, }

        def generate_pack_data(have, want, ofs_delta=False):
            return pack_objects_to_data([(commit, None), (tree, ''), ])

        self.assertRaises(UpdateRefsError,
                          self.client.send_pack, "blah",
                          update_refs, generate_pack_data)

    def test_send_pack_none(self):
        self.rin.write(
            b'0078310ca9477129b8586fa2afc779c1f57cf64bba6c '
            b'refs/heads/master\x00 report-status delete-refs '
            b'side-band-64k quiet ofs-delta\n'
            b'0000')
        self.rin.seek(0)

        def update_refs(refs):
            return {
                b'refs/heads/master':
                    b'310ca9477129b8586fa2afc779c1f57cf64bba6c'
            }

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        self.client.send_pack(b'/', update_refs, generate_pack_data)
        self.assertEqual(self.rout.getvalue(), b'0000')

    def test_send_pack_keep_and_delete(self):
        self.rin.write(
            b'0063310ca9477129b8586fa2afc779c1f57cf64bba6c '
            b'refs/heads/master\x00report-status delete-refs ofs-delta\n'
            b'003f310ca9477129b8586fa2afc779c1f57cf64bba6c refs/heads/keepme\n'
            b'0000000eunpack ok\n'
            b'0019ok refs/heads/master\n'
            b'0000')
        self.rin.seek(0)

        def update_refs(refs):
            return {b'refs/heads/master': b'0' * 40}

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        self.client.send_pack(b'/', update_refs, generate_pack_data)
        self.assertIn(
            self.rout.getvalue(),
            [b'007f310ca9477129b8586fa2afc779c1f57cf64bba6c '
             b'0000000000000000000000000000000000000000 '
             b'refs/heads/master\x00report-status ofs-delta0000',
             b'007f310ca9477129b8586fa2afc779c1f57cf64bba6c '
             b'0000000000000000000000000000000000000000 '
             b'refs/heads/master\x00ofs-delta report-status0000'])

    def test_send_pack_delete_only(self):
        self.rin.write(
            b'0063310ca9477129b8586fa2afc779c1f57cf64bba6c '
            b'refs/heads/master\x00report-status delete-refs ofs-delta\n'
            b'0000000eunpack ok\n'
            b'0019ok refs/heads/master\n'
            b'0000')
        self.rin.seek(0)

        def update_refs(refs):
            return {b'refs/heads/master': b'0' * 40}

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        self.client.send_pack(b'/', update_refs, generate_pack_data)
        self.assertIn(
            self.rout.getvalue(),
            [b'007f310ca9477129b8586fa2afc779c1f57cf64bba6c '
             b'0000000000000000000000000000000000000000 '
             b'refs/heads/master\x00report-status ofs-delta0000',
             b'007f310ca9477129b8586fa2afc779c1f57cf64bba6c '
             b'0000000000000000000000000000000000000000 '
             b'refs/heads/master\x00ofs-delta report-status0000'])

    def test_send_pack_new_ref_only(self):
        self.rin.write(
            b'0063310ca9477129b8586fa2afc779c1f57cf64bba6c '
            b'refs/heads/master\x00report-status delete-refs ofs-delta\n'
            b'0000000eunpack ok\n'
            b'0019ok refs/heads/blah12\n'
            b'0000')
        self.rin.seek(0)

        def update_refs(refs):
            return {
                b'refs/heads/blah12':
                b'310ca9477129b8586fa2afc779c1f57cf64bba6c',
                b'refs/heads/master':
                    b'310ca9477129b8586fa2afc779c1f57cf64bba6c'
            }

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        f = BytesIO()
        write_pack_objects(f, {})
        self.client.send_pack('/', update_refs, generate_pack_data)
        self.assertIn(
            self.rout.getvalue(),
            [b'007f0000000000000000000000000000000000000000 '
             b'310ca9477129b8586fa2afc779c1f57cf64bba6c '
             b'refs/heads/blah12\x00report-status ofs-delta0000' +
             f.getvalue(),
             b'007f0000000000000000000000000000000000000000 '
             b'310ca9477129b8586fa2afc779c1f57cf64bba6c '
             b'refs/heads/blah12\x00ofs-delta report-status0000' +
             f.getvalue()])

    def test_send_pack_new_ref(self):
        self.rin.write(
            b'0064310ca9477129b8586fa2afc779c1f57cf64bba6c '
            b'refs/heads/master\x00 report-status delete-refs ofs-delta\n'
            b'0000000eunpack ok\n'
            b'0019ok refs/heads/blah12\n'
            b'0000')
        self.rin.seek(0)

        tree = Tree()
        commit = Commit()
        commit.tree = tree
        commit.parents = []
        commit.author = commit.committer = b'test user'
        commit.commit_time = commit.author_time = 1174773719
        commit.commit_timezone = commit.author_timezone = 0
        commit.encoding = b'UTF-8'
        commit.message = b'test message'

        def update_refs(refs):
            return {
                b'refs/heads/blah12': commit.id,
                b'refs/heads/master':
                    b'310ca9477129b8586fa2afc779c1f57cf64bba6c'
            }

        def generate_pack_data(have, want, ofs_delta=False):
            return pack_objects_to_data([(commit, None), (tree, b''), ])

        f = BytesIO()
        write_pack_data(f, *generate_pack_data(None, None))
        self.client.send_pack(b'/', update_refs, generate_pack_data)
        self.assertIn(
            self.rout.getvalue(),
            [b'007f0000000000000000000000000000000000000000 ' + commit.id +
             b' refs/heads/blah12\x00report-status ofs-delta0000' +
             f.getvalue(),
             b'007f0000000000000000000000000000000000000000 ' + commit.id +
             b' refs/heads/blah12\x00ofs-delta report-status0000' +
             f.getvalue()])

    def test_send_pack_no_deleteref_delete_only(self):
        pkts = [b'310ca9477129b8586fa2afc779c1f57cf64bba6c refs/heads/master'
                b'\x00 report-status ofs-delta\n',
                b'',
                b'']
        for pkt in pkts:
            if pkt == b'':
                self.rin.write(b"0000")
            else:
                self.rin.write(("%04x" % (len(pkt)+4)).encode('ascii') + pkt)
        self.rin.seek(0)

        def update_refs(refs):
            return {b'refs/heads/master': b'0' * 40}

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        self.assertRaises(UpdateRefsError,
                          self.client.send_pack, b"/",
                          update_refs, generate_pack_data)
        self.assertEqual(self.rout.getvalue(), b'0000')


class TestGetTransportAndPath(TestCase):

    def test_tcp(self):
        c, path = get_transport_and_path('git://foo.com/bar/baz')
        self.assertTrue(isinstance(c, TCPGitClient))
        self.assertEqual('foo.com', c._host)
        self.assertEqual(TCP_GIT_PORT, c._port)
        self.assertEqual('/bar/baz', path)

    def test_tcp_port(self):
        c, path = get_transport_and_path('git://foo.com:1234/bar/baz')
        self.assertTrue(isinstance(c, TCPGitClient))
        self.assertEqual('foo.com', c._host)
        self.assertEqual(1234, c._port)
        self.assertEqual('/bar/baz', path)

    def test_git_ssh_explicit(self):
        c, path = get_transport_and_path('git+ssh://foo.com/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('/bar/baz', path)

    def test_ssh_explicit(self):
        c, path = get_transport_and_path('ssh://foo.com/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('/bar/baz', path)

    def test_ssh_port_explicit(self):
        c, path = get_transport_and_path(
            'git+ssh://foo.com:1234/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(1234, c.port)
        self.assertEqual('/bar/baz', path)

    def test_username_and_port_explicit_unknown_scheme(self):
        c, path = get_transport_and_path(
            'unknown://git@server:7999/dply/stuff.git')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('unknown', c.host)
        self.assertEqual('//git@server:7999/dply/stuff.git', path)

    def test_username_and_port_explicit(self):
        c, path = get_transport_and_path(
            'ssh://git@server:7999/dply/stuff.git')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('git', c.username)
        self.assertEqual('server', c.host)
        self.assertEqual(7999, c.port)
        self.assertEqual('/dply/stuff.git', path)

    def test_ssh_abspath_doubleslash(self):
        c, path = get_transport_and_path('git+ssh://foo.com//bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('//bar/baz', path)

    def test_ssh_port(self):
        c, path = get_transport_and_path(
            'git+ssh://foo.com:1234/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(1234, c.port)
        self.assertEqual('/bar/baz', path)

    def test_ssh_implicit(self):
        c, path = get_transport_and_path('foo:/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('/bar/baz', path)

    def test_ssh_host(self):
        c, path = get_transport_and_path('foo.com:/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('/bar/baz', path)

    def test_ssh_user_host(self):
        c, path = get_transport_and_path('user@foo.com:/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual('user', c.username)
        self.assertEqual('/bar/baz', path)

    def test_ssh_relpath(self):
        c, path = get_transport_and_path('foo:bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('bar/baz', path)

    def test_ssh_host_relpath(self):
        c, path = get_transport_and_path('foo.com:bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('bar/baz', path)

    def test_ssh_user_host_relpath(self):
        c, path = get_transport_and_path('user@foo.com:bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual('user', c.username)
        self.assertEqual('bar/baz', path)

    def test_local(self):
        c, path = get_transport_and_path('foo.bar/baz')
        self.assertTrue(isinstance(c, LocalGitClient))
        self.assertEqual('foo.bar/baz', path)

    @skipIf(sys.platform != 'win32', 'Behaviour only happens on windows.')
    def test_local_abs_windows_path(self):
        c, path = get_transport_and_path('C:\\foo.bar\\baz')
        self.assertTrue(isinstance(c, LocalGitClient))
        self.assertEqual('C:\\foo.bar\\baz', path)

    def test_error(self):
        # Need to use a known urlparse.uses_netloc URL scheme to get the
        # expected parsing of the URL on Python versions less than 2.6.5
        c, path = get_transport_and_path('prospero://bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))

    def test_http(self):
        url = 'https://github.com/jelmer/dulwich'
        c, path = get_transport_and_path(url)
        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual('/jelmer/dulwich', path)

    def test_http_auth(self):
        url = 'https://user:passwd@github.com/jelmer/dulwich'

        c, path = get_transport_and_path(url)

        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual('/jelmer/dulwich', path)
        self.assertEqual('user', c._username)
        self.assertEqual('passwd', c._password)

    def test_http_auth_with_username(self):
        url = 'https://github.com/jelmer/dulwich'

        c, path = get_transport_and_path(
                url, username='user2', password='blah')

        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual('/jelmer/dulwich', path)
        self.assertEqual('user2', c._username)
        self.assertEqual('blah', c._password)

    def test_http_auth_with_username_and_in_url(self):
        url = 'https://user:passwd@github.com/jelmer/dulwich'

        c, path = get_transport_and_path(
                url, username='user2', password='blah')

        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual('/jelmer/dulwich', path)
        self.assertEqual('user', c._username)
        self.assertEqual('passwd', c._password)

    def test_http_no_auth(self):
        url = 'https://github.com/jelmer/dulwich'

        c, path = get_transport_and_path(url)

        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual('/jelmer/dulwich', path)
        self.assertIs(None, c._username)
        self.assertIs(None, c._password)


class TestGetTransportAndPathFromUrl(TestCase):

    def test_tcp(self):
        c, path = get_transport_and_path_from_url('git://foo.com/bar/baz')
        self.assertTrue(isinstance(c, TCPGitClient))
        self.assertEqual('foo.com', c._host)
        self.assertEqual(TCP_GIT_PORT, c._port)
        self.assertEqual('/bar/baz', path)

    def test_tcp_port(self):
        c, path = get_transport_and_path_from_url('git://foo.com:1234/bar/baz')
        self.assertTrue(isinstance(c, TCPGitClient))
        self.assertEqual('foo.com', c._host)
        self.assertEqual(1234, c._port)
        self.assertEqual('/bar/baz', path)

    def test_ssh_explicit(self):
        c, path = get_transport_and_path_from_url('git+ssh://foo.com/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('/bar/baz', path)

    def test_ssh_port_explicit(self):
        c, path = get_transport_and_path_from_url(
            'git+ssh://foo.com:1234/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(1234, c.port)
        self.assertEqual('/bar/baz', path)

    def test_ssh_homepath(self):
        c, path = get_transport_and_path_from_url(
            'git+ssh://foo.com/~/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual('/~/bar/baz', path)

    def test_ssh_port_homepath(self):
        c, path = get_transport_and_path_from_url(
            'git+ssh://foo.com:1234/~/bar/baz')
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual('foo.com', c.host)
        self.assertEqual(1234, c.port)
        self.assertEqual('/~/bar/baz', path)

    def test_ssh_host_relpath(self):
        self.assertRaises(
            ValueError, get_transport_and_path_from_url,
            'foo.com:bar/baz')

    def test_ssh_user_host_relpath(self):
        self.assertRaises(
            ValueError, get_transport_and_path_from_url,
            'user@foo.com:bar/baz')

    def test_local_path(self):
        self.assertRaises(
            ValueError, get_transport_and_path_from_url,
            'foo.bar/baz')

    def test_error(self):
        # Need to use a known urlparse.uses_netloc URL scheme to get the
        # expected parsing of the URL on Python versions less than 2.6.5
        self.assertRaises(
            ValueError, get_transport_and_path_from_url,
            'prospero://bar/baz')

    def test_http(self):
        url = 'https://github.com/jelmer/dulwich'
        c, path = get_transport_and_path_from_url(url)
        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual('https://github.com', c.get_url(b'/'))
        self.assertEqual('/jelmer/dulwich', path)

    def test_http_port(self):
        url = 'https://github.com:9090/jelmer/dulwich'
        c, path = get_transport_and_path_from_url(url)
        self.assertEqual('https://github.com:9090', c.get_url(b'/'))
        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual('/jelmer/dulwich', path)

    def test_file(self):
        c, path = get_transport_and_path_from_url('file:///home/jelmer/foo')
        self.assertTrue(isinstance(c, LocalGitClient))
        self.assertEqual('/home/jelmer/foo', path)


class TestSSHVendor(object):

    def __init__(self):
        self.host = None
        self.command = ""
        self.username = None
        self.port = None
        self.password = None
        self.key_filename = None

    def run_command(self, host, command, username=None, port=None,
                    password=None, key_filename=None):
        self.host = host
        self.command = command
        self.username = username
        self.port = port
        self.password = password
        self.key_filename = key_filename

        class Subprocess:
            pass
        setattr(Subprocess, 'read', lambda: None)
        setattr(Subprocess, 'write', lambda: None)
        setattr(Subprocess, 'close', lambda: None)
        setattr(Subprocess, 'can_read', lambda: None)
        return Subprocess()


class SSHGitClientTests(TestCase):

    def setUp(self):
        super(SSHGitClientTests, self).setUp()

        self.server = TestSSHVendor()
        self.real_vendor = client.get_ssh_vendor
        client.get_ssh_vendor = lambda: self.server

        self.client = SSHGitClient('git.samba.org')

    def tearDown(self):
        super(SSHGitClientTests, self).tearDown()
        client.get_ssh_vendor = self.real_vendor

    def test_get_url(self):
        path = '/tmp/repo.git'
        c = SSHGitClient('git.samba.org')

        url = c.get_url(path)
        self.assertEqual('ssh://git.samba.org/tmp/repo.git', url)

    def test_get_url_with_username_and_port(self):
        path = '/tmp/repo.git'
        c = SSHGitClient('git.samba.org', port=2222, username='user')

        url = c.get_url(path)
        self.assertEqual('ssh://user@git.samba.org:2222/tmp/repo.git', url)

    def test_default_command(self):
        self.assertEqual(
            b'git-upload-pack',
            self.client._get_cmd_path(b'upload-pack'))

    def test_alternative_command_path(self):
        self.client.alternative_paths[b'upload-pack'] = (
            b'/usr/lib/git/git-upload-pack')
        self.assertEqual(
            b'/usr/lib/git/git-upload-pack',
            self.client._get_cmd_path(b'upload-pack'))

    def test_alternative_command_path_spaces(self):
        self.client.alternative_paths[b'upload-pack'] = (
            b'/usr/lib/git/git-upload-pack -ibla')
        self.assertEqual(b"/usr/lib/git/git-upload-pack -ibla",
                         self.client._get_cmd_path(b'upload-pack'))

    def test_connect(self):
        server = self.server
        client = self.client

        client.username = b"username"
        client.port = 1337

        client._connect(b"command", b"/path/to/repo")
        self.assertEqual(b"username", server.username)
        self.assertEqual(1337, server.port)
        self.assertEqual("git-command '/path/to/repo'", server.command)

        client._connect(b"relative-command", b"/~/path/to/repo")
        self.assertEqual("git-relative-command '~/path/to/repo'",
                         server.command)


class ReportStatusParserTests(TestCase):

    def test_invalid_pack(self):
        parser = ReportStatusParser()
        parser.handle_packet(b"unpack error - foo bar")
        parser.handle_packet(b"ok refs/foo/bar")
        parser.handle_packet(None)
        self.assertRaises(SendPackError, parser.check)

    def test_update_refs_error(self):
        parser = ReportStatusParser()
        parser.handle_packet(b"unpack ok")
        parser.handle_packet(b"ng refs/foo/bar need to pull")
        parser.handle_packet(None)
        self.assertRaises(UpdateRefsError, parser.check)

    def test_ok(self):
        parser = ReportStatusParser()
        parser.handle_packet(b"unpack ok")
        parser.handle_packet(b"ok refs/foo/bar")
        parser.handle_packet(None)
        parser.check()


class LocalGitClientTests(TestCase):

    def test_get_url(self):
        path = "/tmp/repo.git"
        c = LocalGitClient()

        url = c.get_url(path)
        self.assertEqual('file:///tmp/repo.git', url)

    def test_fetch_into_empty(self):
        c = LocalGitClient()
        t = MemoryRepo()
        s = open_repo('a.git')
        self.addCleanup(tear_down_repo, s)
        self.assertEqual(s.get_refs(), c.fetch(s.path, t).refs)

    def test_fetch_empty(self):
        c = LocalGitClient()
        s = open_repo('a.git')
        self.addCleanup(tear_down_repo, s)
        out = BytesIO()
        walker = {}
        ret = c.fetch_pack(
            s.path, lambda heads: [], graph_walker=walker, pack_data=out.write)
        self.assertEqual({
            b'HEAD': b'a90fa2d900a17e99b433217e988c4eb4a2e9a097',
            b'refs/heads/master': b'a90fa2d900a17e99b433217e988c4eb4a2e9a097',
            b'refs/tags/mytag': b'28237f4dc30d0d462658d6b937b08a0f0b6ef55a',
            b'refs/tags/mytag-packed':
                b'b0931cadc54336e78a1d980420e3268903b57a50'
            }, ret.refs)
        self.assertEqual(
                {b'HEAD': b'refs/heads/master'},
                ret.symrefs)
        self.assertEqual(
                b"PACK\x00\x00\x00\x02\x00\x00\x00\x00\x02\x9d\x08"
                b"\x82;\xd8\xa8\xea\xb5\x10\xadj\xc7\\\x82<\xfd>\xd3\x1e",
                out.getvalue())

    def test_fetch_pack_none(self):
        c = LocalGitClient()
        s = open_repo('a.git')
        self.addCleanup(tear_down_repo, s)
        out = BytesIO()
        walker = MemoryRepo().get_graph_walker()
        ret = c.fetch_pack(
            s.path,
            lambda heads: [b"a90fa2d900a17e99b433217e988c4eb4a2e9a097"],
            graph_walker=walker, pack_data=out.write)
        self.assertEqual({b'HEAD': b'refs/heads/master'}, ret.symrefs)
        self.assertEqual({
            b'HEAD': b'a90fa2d900a17e99b433217e988c4eb4a2e9a097',
            b'refs/heads/master': b'a90fa2d900a17e99b433217e988c4eb4a2e9a097',
            b'refs/tags/mytag': b'28237f4dc30d0d462658d6b937b08a0f0b6ef55a',
            b'refs/tags/mytag-packed':
            b'b0931cadc54336e78a1d980420e3268903b57a50'
            }, ret.refs)
        # Hardcoding is not ideal, but we'll fix that some other day..
        self.assertTrue(out.getvalue().startswith(
                b'PACK\x00\x00\x00\x02\x00\x00\x00\x07'))

    def test_send_pack_without_changes(self):
        local = open_repo('a.git')
        self.addCleanup(tear_down_repo, local)

        target = open_repo('a.git')
        self.addCleanup(tear_down_repo, target)

        self.send_and_verify(b"master", local, target)

    def test_send_pack_with_changes(self):
        local = open_repo('a.git')
        self.addCleanup(tear_down_repo, local)

        target_path = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, target_path)
        with Repo.init_bare(target_path) as target:
            self.send_and_verify(b"master", local, target)

    def test_get_refs(self):
        local = open_repo('refs.git')
        self.addCleanup(tear_down_repo, local)

        client = LocalGitClient()
        refs = client.get_refs(local.path)
        self.assertDictEqual(local.refs.as_dict(), refs)

    def send_and_verify(self, branch, local, target):
        """Send branch from local to remote repository and verify it worked."""
        client = LocalGitClient()
        ref_name = b"refs/heads/" + branch
        new_refs = client.send_pack(target.path,
                                    lambda _: {ref_name: local.refs[ref_name]},
                                    local.object_store.generate_pack_data)

        self.assertEqual(local.refs[ref_name], new_refs[ref_name])

        obj_local = local.get_object(new_refs[ref_name])
        obj_target = target.get_object(new_refs[ref_name])
        self.assertEqual(obj_local, obj_target)


class HttpGitClientTests(TestCase):

    @staticmethod
    def b64encode(s):
        """Python 2/3 compatible Base64 encoder. Returns string."""
        try:
            return base64.b64encode(s)
        except TypeError:
            return base64.b64encode(s.encode('latin1')).decode('ascii')

    def test_get_url(self):
        base_url = 'https://github.com/jelmer/dulwich'
        path = '/jelmer/dulwich'
        c = HttpGitClient(base_url)

        url = c.get_url(path)
        self.assertEqual('https://github.com/jelmer/dulwich', url)

    def test_get_url_bytes_path(self):
        base_url = 'https://github.com/jelmer/dulwich'
        path_bytes = b'/jelmer/dulwich'
        c = HttpGitClient(base_url)

        url = c.get_url(path_bytes)
        self.assertEqual('https://github.com/jelmer/dulwich', url)

    def test_get_url_with_username_and_passwd(self):
        base_url = 'https://github.com/jelmer/dulwich'
        path = '/jelmer/dulwich'
        c = HttpGitClient(base_url, username='USERNAME', password='PASSWD')

        url = c.get_url(path)
        self.assertEqual('https://github.com/jelmer/dulwich', url)

    def test_init_username_passwd_set(self):
        url = 'https://github.com/jelmer/dulwich'

        c = HttpGitClient(url, config=None, username='user', password='passwd')
        self.assertEqual('user', c._username)
        self.assertEqual('passwd', c._password)

        basic_auth = c.pool_manager.headers['authorization']
        auth_string = '%s:%s' % ('user', 'passwd')
        b64_credentials = self.b64encode(auth_string)
        expected_basic_auth = 'Basic %s' % b64_credentials
        self.assertEqual(basic_auth, expected_basic_auth)

    def test_init_no_username_passwd(self):
        url = 'https://github.com/jelmer/dulwich'

        c = HttpGitClient(url, config=None)
        self.assertIs(None, c._username)
        self.assertIs(None, c._password)
        self.assertNotIn('authorization', c.pool_manager.headers)

    def test_from_parsedurl_on_url_with_quoted_credentials(self):
        original_username = 'john|the|first'
        quoted_username = urlquote(original_username)

        original_password = 'Ya#1$2%3'
        quoted_password = urlquote(original_password)

        url = 'https://{username}:{password}@github.com/jelmer/dulwich'.format(
            username=quoted_username,
            password=quoted_password
        )

        c = HttpGitClient.from_parsedurl(urlparse.urlparse(url))
        self.assertEqual(original_username, c._username)
        self.assertEqual(original_password, c._password)

        basic_auth = c.pool_manager.headers['authorization']
        auth_string = '%s:%s' % (original_username, original_password)
        b64_credentials = self.b64encode(auth_string)
        expected_basic_auth = 'Basic %s' % str(b64_credentials)
        self.assertEqual(basic_auth, expected_basic_auth)

    def test_url_redirect_location(self):

        from urllib3.response import HTTPResponse

        test_data = {
            'https://gitlab.com/inkscape/inkscape/': {
                'redirect_url': 'https://gitlab.com/inkscape/inkscape.git/',
                'refs_data': (b'001e# service=git-upload-pack\n00000032'
                              b'fb2bebf4919a011f0fd7cec085443d0031228e76 '
                              b'HEAD\n0000')
            },
            'https://github.com/jelmer/dulwich/': {
                'redirect_url': 'https://github.com/jelmer/dulwich/',
                'refs_data': (b'001e# service=git-upload-pack\n00000032'
                              b'3ff25e09724aa4d86ea5bca7d5dd0399a3c8bfcf '
                              b'HEAD\n0000')
            }
        }

        tail = 'info/refs?service=git-upload-pack'

        # we need to mock urllib3.PoolManager as this test will fail
        # otherwise without an active internet connection
        class PoolManagerMock():

            def __init__(self):
                self.headers = {}

            def request(self, method, url, fields=None, headers=None,
                        redirect=True):
                base_url = url[:-len(tail)]
                redirect_base_url = test_data[base_url]['redirect_url']
                redirect_url = redirect_base_url + tail
                headers = {
                    'Content-Type':
                    'application/x-git-upload-pack-advertisement'
                }
                body = test_data[base_url]['refs_data']
                # urllib3 handles automatic redirection by default
                status = 200
                request_url = redirect_url
                # simulate urllib3 behavior when redirect parameter is False
                if redirect is False:
                    request_url = url
                    if redirect_base_url != base_url:
                        body = ''
                        headers['location'] = redirect_url
                        status = 301
                return HTTPResponse(body=body,
                                    headers=headers,
                                    request_method=method,
                                    request_url=request_url,
                                    status=status)

        pool_manager = PoolManagerMock()

        for base_url in test_data.keys():
            # instantiate HttpGitClient with mocked pool manager
            c = HttpGitClient(base_url, pool_manager=pool_manager,
                              config=None)
            # call method that detects url redirection
            _, _, processed_url = c._discover_references(b'git-upload-pack',
                                                         base_url)

            # send the same request as the method above without redirection
            resp = c.pool_manager.request('GET', base_url + tail,
                                          redirect=False)

            # check expected behavior of urllib3
            redirect_location = resp.get_redirect_location()
            if resp.status == 200:
                self.assertFalse(redirect_location)

            if redirect_location:
                # check that url redirection has been correctly detected
                self.assertEqual(processed_url, redirect_location[:-len(tail)])
            else:
                # check also the no redirection case
                self.assertEqual(processed_url, base_url)


class TCPGitClientTests(TestCase):

    def test_get_url(self):
        host = 'github.com'
        path = '/jelmer/dulwich'
        c = TCPGitClient(host)

        url = c.get_url(path)
        self.assertEqual('git://github.com/jelmer/dulwich', url)

    def test_get_url_with_port(self):
        host = 'github.com'
        path = '/jelmer/dulwich'
        port = 9090
        c = TCPGitClient(host, port=port)

        url = c.get_url(path)
        self.assertEqual('git://github.com:9090/jelmer/dulwich', url)


class DefaultUrllib3ManagerTest(TestCase):

    def test_no_config(self):
        manager = default_urllib3_manager(config=None)
        self.assertEqual(manager.connection_pool_kw['cert_reqs'],
                         'CERT_REQUIRED')

    def test_config_no_proxy(self):
        manager = default_urllib3_manager(config=ConfigDict())
        self.assertNotIsInstance(manager, urllib3.ProxyManager)

    def test_config_ssl(self):
        config = ConfigDict()
        config.set(b'http', b'sslVerify', b'true')
        manager = default_urllib3_manager(config=config)
        self.assertEqual(manager.connection_pool_kw['cert_reqs'],
                         'CERT_REQUIRED')

    def test_config_no_ssl(self):
        config = ConfigDict()
        config.set(b'http', b'sslVerify', b'false')
        manager = default_urllib3_manager(config=config)
        self.assertEqual(manager.connection_pool_kw['cert_reqs'],
                         'CERT_NONE')

    def test_config_proxy(self):
        config = ConfigDict()
        config.set(b'http', b'proxy', b'http://localhost:3128/')
        manager = default_urllib3_manager(config=config)

        self.assertIsInstance(manager, urllib3.ProxyManager)
        self.assertTrue(hasattr(manager, 'proxy'))
        self.assertEqual(manager.proxy.scheme, 'http')
        self.assertEqual(manager.proxy.host, 'localhost')
        self.assertEqual(manager.proxy.port, 3128)

    def test_config_no_verify_ssl(self):
        manager = default_urllib3_manager(config=None, cert_reqs="CERT_NONE")
        self.assertEqual(manager.connection_pool_kw['cert_reqs'], 'CERT_NONE')


class SubprocessSSHVendorTests(TestCase):

    def setUp(self):
        # Monkey Patch client subprocess popen
        self._orig_popen = dulwich.client.subprocess.Popen
        dulwich.client.subprocess.Popen = DummyPopen

    def tearDown(self):
        dulwich.client.subprocess.Popen = self._orig_popen

    def test_run_command_dashes(self):
        vendor = SubprocessSSHVendor()
        self.assertRaises(StrangeHostname, vendor.run_command, '--weird-host',
                          'git-clone-url')

    def test_run_command_password(self):
        vendor = SubprocessSSHVendor()
        self.assertRaises(NotImplementedError, vendor.run_command, 'host',
                          'git-clone-url', password='12345')

    def test_run_command_password_and_privkey(self):
        vendor = SubprocessSSHVendor()
        self.assertRaises(NotImplementedError, vendor.run_command,
                          'host', 'git-clone-url',
                          password='12345', key_filename='/tmp/id_rsa')

    def test_run_command_with_port_username_and_privkey(self):
        expected = ['ssh', '-x', '-p', '2200',
                    '-i', '/tmp/id_rsa', 'user@host', 'git-clone-url']

        vendor = SubprocessSSHVendor()
        command = vendor.run_command(
            'host', 'git-clone-url',
            username='user', port='2200',
            key_filename='/tmp/id_rsa')

        args = command.proc.args

        self.assertListEqual(expected, args[0])


class PLinkSSHVendorTests(TestCase):

    def setUp(self):
        # Monkey Patch client subprocess popen
        self._orig_popen = dulwich.client.subprocess.Popen
        dulwich.client.subprocess.Popen = DummyPopen

    def tearDown(self):
        dulwich.client.subprocess.Popen = self._orig_popen

    def test_run_command_dashes(self):
        vendor = PLinkSSHVendor()
        self.assertRaises(StrangeHostname, vendor.run_command, '--weird-host',
                          'git-clone-url')

    def test_run_command_password_and_privkey(self):
        vendor = PLinkSSHVendor()

        warnings.simplefilter("always", UserWarning)
        self.addCleanup(warnings.resetwarnings)
        warnings_list, restore_warnings = setup_warning_catcher()
        self.addCleanup(restore_warnings)

        command = vendor.run_command(
                'host', 'git-clone-url', password='12345',
                key_filename='/tmp/id_rsa')

        expected_warning = UserWarning(
            'Invoking PLink with a password exposes the password in the '
            'process list.')

        for w in warnings_list:
            if (type(w) == type(expected_warning) and
                    w.args == expected_warning.args):
                break
        else:
            raise AssertionError(
                'Expected warning %r not in %r' %
                (expected_warning, warnings_list))

        args = command.proc.args

        if sys.platform == 'win32':
            binary = ['plink.exe', '-ssh']
        else:
            binary = ['plink', '-ssh']
        expected = binary + [
                '-pw', '12345', '-i', '/tmp/id_rsa', 'host', 'git-clone-url']
        self.assertListEqual(expected, args[0])

    def test_run_command_password(self):
        if sys.platform == 'win32':
            binary = ['plink.exe', '-ssh']
        else:
            binary = ['plink', '-ssh']
        expected = binary + ['-pw', '12345', 'host', 'git-clone-url']

        vendor = PLinkSSHVendor()

        warnings.simplefilter("always", UserWarning)
        self.addCleanup(warnings.resetwarnings)
        warnings_list, restore_warnings = setup_warning_catcher()
        self.addCleanup(restore_warnings)

        command = vendor.run_command('host', 'git-clone-url', password='12345')

        expected_warning = UserWarning(
            'Invoking PLink with a password exposes the password in the '
            'process list.')

        for w in warnings_list:
            if (type(w) == type(expected_warning) and
                    w.args == expected_warning.args):
                break
        else:
            raise AssertionError(
                'Expected warning %r not in %r' %
                (expected_warning, warnings_list))

        args = command.proc.args

        self.assertListEqual(expected, args[0])

    def test_run_command_with_port_username_and_privkey(self):
        if sys.platform == 'win32':
            binary = ['plink.exe', '-ssh']
        else:
            binary = ['plink', '-ssh']
        expected = binary + [
            '-P', '2200', '-i', '/tmp/id_rsa',
            'user@host', 'git-clone-url']

        vendor = PLinkSSHVendor()
        command = vendor.run_command(
            'host', 'git-clone-url',
            username='user', port='2200',
            key_filename='/tmp/id_rsa')

        args = command.proc.args

        self.assertListEqual(expected, args[0])


class RsyncUrlTests(TestCase):

    def test_simple(self):
        self.assertEqual(
                parse_rsync_url('foo:bar/path'),
                (None, 'foo', 'bar/path'))
        self.assertEqual(
                parse_rsync_url('user@foo:bar/path'),
                ('user', 'foo', 'bar/path'))

    def test_path(self):
        self.assertRaises(ValueError, parse_rsync_url, '/path')


class CheckWantsTests(TestCase):

    def test_fine(self):
        check_wants(
            [b'2f3dc7a53fb752a6961d3a56683df46d4d3bf262'],
            {b'refs/heads/blah': b'2f3dc7a53fb752a6961d3a56683df46d4d3bf262'})

    def test_missing(self):
        self.assertRaises(
            InvalidWants, check_wants,
            [b'2f3dc7a53fb752a6961d3a56683df46d4d3bf262'],
            {b'refs/heads/blah': b'3f3dc7a53fb752a6961d3a56683df46d4d3bf262'})

    def test_annotated(self):
        self.assertRaises(
            InvalidWants, check_wants,
            [b'2f3dc7a53fb752a6961d3a56683df46d4d3bf262'],
            {b'refs/heads/blah': b'3f3dc7a53fb752a6961d3a56683df46d4d3bf262',
             b'refs/heads/blah^{}':
                b'2f3dc7a53fb752a6961d3a56683df46d4d3bf262'})
