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  • Committer: Jelmer Vernooij
  • Date: 2018-04-02 14:59:43 UTC
  • mto: (0.200.1913 work)
  • mto: This revision was merged to the branch mainline in revision 6960.
  • Revision ID: jelmer@jelmer.uk-20180402145943-s5jmpbvvf1x42pao
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__init__.py
 
1
# Copyright (C) 2009-2018 Jelmer Vernooij <jelmer@jelmer.uk>
 
2
# Copyright (C) 2006-2009 Canonical Ltd
 
3
 
 
4
# Authors: Robert Collins <robert.collins@canonical.com>
 
5
#          Jelmer Vernooij <jelmer@jelmer.uk>
 
6
#          John Carr <john.carr@unrouted.co.uk>
 
7
#
 
8
# This program is free software; you can redistribute it and/or modify
 
9
# it under the terms of the GNU General Public License as published by
 
10
# the Free Software Foundation; either version 2 of the License, or
 
11
# (at your option) any later version.
 
12
#
 
13
# This program is distributed in the hope that it will be useful,
 
14
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
15
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
16
# GNU General Public License for more details.
 
17
#
 
18
# You should have received a copy of the GNU General Public License
 
19
# along with this program; if not, write to the Free Software
 
20
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
21
 
 
22
 
 
23
"""A GIT branch and repository format implementation for bzr."""
 
24
 
 
25
from __future__ import absolute_import
 
26
 
 
27
import os
 
28
import sys
 
29
 
 
30
import breezy
 
31
 
 
32
from .info import (
 
33
    bzr_compatible_versions,
 
34
    bzr_plugin_version as version_info,
 
35
    dulwich_minimum_version,
 
36
    )
 
37
 
 
38
if version_info[3] == 'final':
 
39
    version_string = '%d.%d.%d' % version_info[:3]
 
40
else:
 
41
    version_string = '%d.%d.%d%s%d' % version_info
 
42
__version__ = version_string
 
43
 
 
44
if breezy.version_info[:3] not in bzr_compatible_versions:
 
45
    from ...errors import IncompatibleVersion
 
46
    raise IncompatibleVersion(breezy,
 
47
            bzr_compatible_versions, breezy.version_info[:3])
 
48
 
 
49
try:
 
50
    from ...i18n import load_plugin_translations
 
51
except ImportError: # No translations for bzr < 2.5
 
52
    gettext = lambda x: x
 
53
else:
 
54
    translation = load_plugin_translations("bzr-git")
 
55
    gettext = translation.gettext
 
56
 
 
57
from ... import (
 
58
    __version__ as breezy_version,
 
59
    errors as bzr_errors,
 
60
    trace,
 
61
    )
 
62
 
 
63
from ...controldir import (
 
64
    ControlDirFormat,
 
65
    Prober,
 
66
    format_registry,
 
67
    network_format_registry as controldir_network_format_registry,
 
68
    )
 
69
 
 
70
from ...transport import (
 
71
    register_lazy_transport,
 
72
    register_transport_proto,
 
73
    transport_server_registry,
 
74
    )
 
75
from ...commands import (
 
76
    plugin_cmds,
 
77
    )
 
78
 
 
79
 
 
80
if getattr(sys, "frozen", None):
 
81
    # allow import additional libs from ./_lib for bzr.exe only
 
82
    sys.path.append(os.path.normpath(
 
83
        os.path.join(os.path.dirname(__file__), '_lib')))
 
84
 
 
85
 
 
86
def import_dulwich():
 
87
    try:
 
88
        from dulwich import __version__ as dulwich_version
 
89
    except ImportError:
 
90
        raise bzr_errors.DependencyNotPresent("dulwich",
 
91
            "bzr-git: Please install dulwich, https://launchpad.net/dulwich")
 
92
    else:
 
93
        if dulwich_version < dulwich_minimum_version:
 
94
            raise bzr_errors.DependencyNotPresent("dulwich",
 
95
                "bzr-git: Dulwich is too old; at least %d.%d.%d is required" %
 
96
                    dulwich_minimum_version)
 
97
 
 
98
 
 
99
_versions_checked = False
 
100
def lazy_check_versions():
 
101
    global _versions_checked
 
102
    if _versions_checked:
 
103
        return
 
104
    import_dulwich()
 
105
    _versions_checked = True
 
106
 
 
107
format_registry.register_lazy('git',
 
108
    __name__ + ".dir", "LocalGitControlDirFormat",
 
109
    help='GIT repository.', native=False, experimental=False,
 
110
    )
 
111
 
 
112
format_registry.register_lazy('git-bare',
 
113
    __name__ + ".dir", "BareLocalGitControlDirFormat",
 
114
    help='Bare GIT repository (no working tree).', native=False,
 
115
    experimental=False,
 
116
    )
 
117
 
 
118
from ...revisionspec import (RevisionSpec_dwim, revspec_registry)
 
119
revspec_registry.register_lazy("git:", __name__ + ".revspec",
 
120
    "RevisionSpec_git")
 
121
RevisionSpec_dwim.append_possible_lazy_revspec(
 
122
    __name__ + ".revspec", "RevisionSpec_git")
 
123
 
 
124
 
 
125
class LocalGitProber(Prober):
 
126
 
 
127
    def probe_transport(self, transport):
 
128
        try:
 
129
            external_url = transport.external_url()
 
130
        except bzr_errors.InProcessTransport:
 
131
            raise bzr_errors.NotBranchError(path=transport.base)
 
132
        if (external_url.startswith("http:") or
 
133
            external_url.startswith("https:")):
 
134
            # Already handled by RemoteGitProber
 
135
            raise bzr_errors.NotBranchError(path=transport.base)
 
136
        from ... import urlutils
 
137
        if urlutils.split(transport.base)[1] == ".git":
 
138
            raise bzr_errors.NotBranchError(path=transport.base)
 
139
        if not transport.has_any(['objects', '.git/objects', '.git']):
 
140
            raise bzr_errors.NotBranchError(path=transport.base)
 
141
        lazy_check_versions()
 
142
        from .dir import (
 
143
            BareLocalGitControlDirFormat,
 
144
            LocalGitControlDirFormat,
 
145
            )
 
146
        if transport.has_any(['.git/objects', '.git']):
 
147
            return LocalGitControlDirFormat()
 
148
        if transport.has('info') and transport.has('objects'):
 
149
            return BareLocalGitControlDirFormat()
 
150
        raise bzr_errors.NotBranchError(path=transport.base)
 
151
 
 
152
    @classmethod
 
153
    def known_formats(cls):
 
154
        from .dir import (
 
155
            BareLocalGitControlDirFormat,
 
156
            LocalGitControlDirFormat,
 
157
            )
 
158
        return set([BareLocalGitControlDirFormat(), LocalGitControlDirFormat()])
 
159
 
 
160
 
 
161
class RemoteGitProber(Prober):
 
162
 
 
163
    def probe_http_transport(self, transport):
 
164
        from ... import urlutils
 
165
        base_url, _ = urlutils.split_segment_parameters(transport.external_url())
 
166
        url = urlutils.join(base_url, "info/refs") + "?service=git-upload-pack"
 
167
        from ...transport.http._urllib import HttpTransport_urllib, Request
 
168
        headers = {"Content-Type": "application/x-git-upload-pack-request"}
 
169
        req = Request('GET', url, accepted_errors=[200, 403, 404, 405],
 
170
                      headers=headers)
 
171
        if req.get_host() == "github.com":
 
172
            # GitHub requires we lie. https://github.com/dulwich/dulwich/issues/562
 
173
            req.add_header("User-Agent", "git/Breezy/%s" % breezy_version)
 
174
        elif req.get_host() == "bazaar.launchpad.net":
 
175
            # Don't attempt Git probes against bazaar.launchpad.net; pad.lv/1744830
 
176
            raise bzr_errors.NotBranchError(transport.base)
 
177
        req.follow_redirections = True
 
178
        resp = transport._perform(req)
 
179
        if resp.code in (404, 405):
 
180
            raise bzr_errors.NotBranchError(transport.base)
 
181
        headers = resp.headers
 
182
        ct = headers.getheader("Content-Type")
 
183
        if ct is None:
 
184
            raise bzr_errors.NotBranchError(transport.base)
 
185
        if ct.startswith("application/x-git"):
 
186
            from .remote import RemoteGitControlDirFormat
 
187
            return RemoteGitControlDirFormat()
 
188
        else:
 
189
            from .dir import (
 
190
                BareLocalGitControlDirFormat,
 
191
                )
 
192
            ret = BareLocalGitControlDirFormat()
 
193
            ret._refs_text = resp.read()
 
194
            return ret
 
195
 
 
196
    def probe_transport(self, transport):
 
197
        try:
 
198
            external_url = transport.external_url()
 
199
        except bzr_errors.InProcessTransport:
 
200
            raise bzr_errors.NotBranchError(path=transport.base)
 
201
 
 
202
        if (external_url.startswith("http:") or
 
203
            external_url.startswith("https:")):
 
204
            return self.probe_http_transport(transport)
 
205
 
 
206
        if (not external_url.startswith("git://") and
 
207
            not external_url.startswith("git+")):
 
208
            raise bzr_errors.NotBranchError(transport.base)
 
209
 
 
210
        # little ugly, but works
 
211
        from .remote import (
 
212
            GitSmartTransport,
 
213
            RemoteGitControlDirFormat,
 
214
            )
 
215
        if isinstance(transport, GitSmartTransport):
 
216
            return RemoteGitControlDirFormat()
 
217
        raise bzr_errors.NotBranchError(path=transport.base)
 
218
 
 
219
    @classmethod
 
220
    def known_formats(cls):
 
221
        from .remote import RemoteGitControlDirFormat
 
222
        return set([RemoteGitControlDirFormat()])
 
223
 
 
224
 
 
225
ControlDirFormat.register_prober(LocalGitProber)
 
226
ControlDirFormat._server_probers.append(RemoteGitProber)
 
227
 
 
228
register_transport_proto('git://',
 
229
        help="Access using the Git smart server protocol.")
 
230
register_transport_proto('git+ssh://',
 
231
        help="Access using the Git smart server protocol over SSH.")
 
232
 
 
233
register_lazy_transport("git://", __name__ + '.remote',
 
234
                        'TCPGitSmartTransport')
 
235
register_lazy_transport("git+ssh://", __name__ + '.remote',
 
236
                        'SSHGitSmartTransport')
 
237
 
 
238
 
 
239
plugin_cmds.register_lazy("cmd_git_import", [], __name__ + ".commands")
 
240
plugin_cmds.register_lazy("cmd_git_object", ["git-objects", "git-cat"],
 
241
    __name__ + ".commands")
 
242
plugin_cmds.register_lazy("cmd_git_refs", [], __name__ + ".commands")
 
243
plugin_cmds.register_lazy("cmd_git_apply", [], __name__ + ".commands")
 
244
plugin_cmds.register_lazy("cmd_git_push_pristine_tar_deltas",
 
245
        ['git-push-pristine-tar', 'git-push-pristine'],
 
246
    __name__ + ".commands")
 
247
 
 
248
def extract_git_foreign_revid(rev):
 
249
    try:
 
250
        foreign_revid = rev.foreign_revid
 
251
    except AttributeError:
 
252
        from .mapping import mapping_registry
 
253
        foreign_revid, mapping = \
 
254
            mapping_registry.parse_revision_id(rev.revision_id)
 
255
        return foreign_revid
 
256
    else:
 
257
        from .mapping import foreign_vcs_git
 
258
        if rev.mapping.vcs == foreign_vcs_git:
 
259
            return foreign_revid
 
260
        else:
 
261
            raise bzr_errors.InvalidRevisionId(rev.revision_id, None)
 
262
 
 
263
 
 
264
def update_stanza(rev, stanza):
 
265
    mapping = getattr(rev, "mapping", None)
 
266
    try:
 
267
        git_commit = extract_git_foreign_revid(rev)
 
268
    except bzr_errors.InvalidRevisionId:
 
269
        pass
 
270
    else:
 
271
        stanza.add("git-commit", git_commit)
 
272
 
 
273
from ...hooks import install_lazy_named_hook
 
274
install_lazy_named_hook("breezy.version_info_formats.format_rio",
 
275
    "RioVersionInfoBuilder.hooks", "revision", update_stanza,
 
276
    "git commits")
 
277
 
 
278
 
 
279
transport_server_registry.register_lazy('git',
 
280
    __name__ + '.server',
 
281
    'serve_git',
 
282
    'Git Smart server protocol over TCP. (default port: 9418)')
 
283
 
 
284
transport_server_registry.register_lazy('git-receive-pack',
 
285
    __name__ + '.server',
 
286
    'serve_git_receive_pack',
 
287
    help='Git Smart server receive pack command. (inetd mode only)')
 
288
transport_server_registry.register_lazy('git-upload-pack',
 
289
    __name__ + 'git.server',
 
290
    'serve_git_upload_pack',
 
291
    help='Git Smart server upload pack command. (inetd mode only)')
 
292
 
 
293
from ...repository import (
 
294
    format_registry as repository_format_registry,
 
295
    network_format_registry as repository_network_format_registry,
 
296
    )
 
297
repository_network_format_registry.register_lazy('git',
 
298
    __name__ + '.repository', 'GitRepositoryFormat')
 
299
 
 
300
register_extra_lazy_repository_format = getattr(repository_format_registry,
 
301
    "register_extra_lazy")
 
302
register_extra_lazy_repository_format(__name__ + '.repository',
 
303
    'GitRepositoryFormat')
 
304
 
 
305
from ...branch import (
 
306
    network_format_registry as branch_network_format_registry,
 
307
    )
 
308
branch_network_format_registry.register_lazy('git',
 
309
    __name__ + '.branch', 'LocalGitBranchFormat')
 
310
 
 
311
 
 
312
from ...branch import (
 
313
    format_registry as branch_format_registry,
 
314
    )
 
315
branch_format_registry.register_extra_lazy(
 
316
    __name__ + '.branch',
 
317
    'LocalGitBranchFormat',
 
318
    )
 
319
branch_format_registry.register_extra_lazy(
 
320
    __name__ + '.remote',
 
321
    'RemoteGitBranchFormat',
 
322
    )
 
323
 
 
324
 
 
325
from ...workingtree import (
 
326
    format_registry as workingtree_format_registry,
 
327
    )
 
328
workingtree_format_registry.register_extra_lazy(
 
329
    __name__ + '.workingtree',
 
330
    'GitWorkingTreeFormat',
 
331
    )
 
332
 
 
333
controldir_network_format_registry.register_lazy('git',
 
334
    __name__ + ".dir", "GitControlDirFormat")
 
335
 
 
336
 
 
337
try:
 
338
    from ...registry import register_lazy
 
339
except ImportError:
 
340
    from ...diff import format_registry as diff_format_registry
 
341
    diff_format_registry.register_lazy('git', __name__ + '.send',
 
342
        'GitDiffTree', 'Git am-style diff format')
 
343
 
 
344
    from ...send import (
 
345
        format_registry as send_format_registry,
 
346
        )
 
347
    send_format_registry.register_lazy('git', __name__ + '.send',
 
348
                                       'send_git', 'Git am-style diff format')
 
349
 
 
350
    from ...directory_service import directories
 
351
    directories.register_lazy('github:', __name__ + '.directory',
 
352
                              'GitHubDirectory',
 
353
                              'GitHub directory.')
 
354
    directories.register_lazy('git@github.com:', __name__ + '.directory',
 
355
                              'GitHubDirectory',
 
356
                              'GitHub directory.')
 
357
 
 
358
    from ...help_topics import (
 
359
        topic_registry,
 
360
        )
 
361
    topic_registry.register_lazy('git', __name__ + '.help', 'help_git',
 
362
        'Using Bazaar with Git')
 
363
 
 
364
    from ...foreign import (
 
365
        foreign_vcs_registry,
 
366
        )
 
367
    foreign_vcs_registry.register_lazy("git",
 
368
        __name__ + ".mapping", "foreign_vcs_git", "Stupid content tracker")
 
369
else:
 
370
    register_lazy("breezy.diff", "format_registry",
 
371
        'git', __name__ + '.send', 'GitDiffTree',
 
372
        'Git am-style diff format')
 
373
    register_lazy("breezy.send", "format_registry",
 
374
        'git', __name__ + '.send', 'send_git',
 
375
        'Git am-style diff format')
 
376
    register_lazy('breezy.directory_service', 'directories', 'github:',
 
377
            __name__ + '.directory', 'GitHubDirectory',
 
378
            'GitHub directory.')
 
379
    register_lazy('breezy.directory_service', 'directories',
 
380
            'git@github.com:', __name__ + '.directory',
 
381
            'GitHubDirectory', 'GitHub directory.')
 
382
    register_lazy('breezy.help_topics', 'topic_registry',
 
383
            'git', __name__ + '.help', 'help_git',
 
384
            'Using Bazaar with Git')
 
385
    register_lazy('breezy.foreign', 'foreign_vcs_registry', "git",
 
386
        __name__ + ".mapping", "foreign_vcs_git", "Stupid content tracker")
 
387
 
 
388
def update_git_cache(repository, revid):
 
389
    """Update the git cache after a local commit."""
 
390
    if getattr(repository, "_git", None) is not None:
 
391
        return # No need to update cache for git repositories
 
392
 
 
393
    if not repository.control_transport.has("git"):
 
394
        return # No existing cache, don't bother updating
 
395
    try:
 
396
        lazy_check_versions()
 
397
    except bzr_errors.DependencyNotPresent, e:
 
398
        # dulwich is probably missing. silently ignore
 
399
        trace.mutter("not updating git map for %r: %s",
 
400
            repository, e)
 
401
 
 
402
    from .object_store import BazaarObjectStore
 
403
    store = BazaarObjectStore(repository)
 
404
    with store.lock_write():
 
405
        try:
 
406
            parent_revisions = set(repository.get_parent_map([revid])[revid])
 
407
        except KeyError:
 
408
            # Isn't this a bit odd - how can a revision that was just committed be missing?
 
409
            return
 
410
        missing_revisions = store._missing_revisions(parent_revisions)
 
411
        if not missing_revisions:
 
412
            # Only update if the cache was up to date previously
 
413
            store._update_sha_map_revision(revid)
 
414
 
 
415
 
 
416
def post_commit_update_cache(local_branch, master_branch, old_revno, old_revid,
 
417
        new_revno, new_revid):
 
418
    if local_branch is not None:
 
419
        update_git_cache(local_branch.repository, new_revid)
 
420
    update_git_cache(master_branch.repository, new_revid)
 
421
 
 
422
 
 
423
def loggerhead_git_hook(branch_app, environ):
 
424
    branch = branch_app.branch
 
425
    config_stack = branch.get_config_stack()
 
426
    if config_stack.get('http_git'):
 
427
        return None
 
428
    from .server import git_http_hook
 
429
    return git_http_hook(branch, environ['REQUEST_METHOD'],
 
430
        environ['PATH_INFO'])
 
431
 
 
432
install_lazy_named_hook("breezy.branch",
 
433
    "Branch.hooks", "post_commit", post_commit_update_cache,
 
434
    "git cache")
 
435
install_lazy_named_hook("breezy.plugins.loggerhead.apps.branch",
 
436
    "BranchWSGIApp.hooks", "controller",
 
437
    loggerhead_git_hook, "git support")
 
438
 
 
439
 
 
440
from ...config import (
 
441
    option_registry,
 
442
    Option,
 
443
    bool_from_store,
 
444
    )
 
445
 
 
446
option_registry.register(
 
447
    Option('git.http',
 
448
           default=None, from_unicode=bool_from_store, invalid='warning',
 
449
           help='''\
 
450
Allow fetching of Git packs over HTTP.
 
451
 
 
452
This enables support for fetching Git packs over HTTP in Loggerhead.
 
453
'''))
 
454
 
 
455
def test_suite():
 
456
    from . import tests
 
457
    return tests.test_suite()