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Viewing changes to breezy/git/__init__.py

  • Committer: Martin
  • Date: 2018-11-16 16:38:22 UTC
  • mto: This revision was merged to the branch mainline in revision 7172.
  • Revision ID: gzlist@googlemail.com-20181116163822-yg1h1cdng6w7w9kn
Make --profile-imports work on Python 3

Also tweak heading to line up correctly.

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breezy/git/__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
dulwich_minimum_version = (0, 19, 7)
 
31
 
 
32
from .. import (
 
33
    __version__ as breezy_version,
 
34
    errors as brz_errors,
 
35
    trace,
 
36
    version_info,  # noqa: F401
 
37
    )
 
38
 
 
39
from ..controldir import (
 
40
    ControlDirFormat,
 
41
    Prober,
 
42
    format_registry,
 
43
    network_format_registry as controldir_network_format_registry,
 
44
    )
 
45
 
 
46
from ..transport import (
 
47
    register_lazy_transport,
 
48
    register_transport_proto,
 
49
    transport_server_registry,
 
50
    )
 
51
from ..commands import (
 
52
    plugin_cmds,
 
53
    )
 
54
 
 
55
 
 
56
if getattr(sys, "frozen", None):
 
57
    # allow import additional libs from ./_lib for bzr.exe only
 
58
    sys.path.append(os.path.normpath(
 
59
        os.path.join(os.path.dirname(__file__), '_lib')))
 
60
 
 
61
 
 
62
def import_dulwich():
 
63
    try:
 
64
        from dulwich import __version__ as dulwich_version
 
65
    except ImportError:
 
66
        raise brz_errors.DependencyNotPresent("dulwich",
 
67
            "bzr-git: Please install dulwich, https://www.dulwich.io/")
 
68
    else:
 
69
        if dulwich_version < dulwich_minimum_version:
 
70
            raise brz_errors.DependencyNotPresent("dulwich",
 
71
                "bzr-git: Dulwich is too old; at least %d.%d.%d is required" %
 
72
                    dulwich_minimum_version)
 
73
 
 
74
 
 
75
_versions_checked = False
 
76
def lazy_check_versions():
 
77
    global _versions_checked
 
78
    if _versions_checked:
 
79
        return
 
80
    import_dulwich()
 
81
    _versions_checked = True
 
82
 
 
83
format_registry.register_lazy('git',
 
84
    __name__ + ".dir", "LocalGitControlDirFormat",
 
85
    help='GIT repository.', native=False, experimental=False,
 
86
    )
 
87
 
 
88
format_registry.register_lazy('git-bare',
 
89
    __name__ + ".dir", "BareLocalGitControlDirFormat",
 
90
    help='Bare GIT repository (no working tree).', native=False,
 
91
    experimental=False,
 
92
    )
 
93
 
 
94
from ..revisionspec import (RevisionSpec_dwim, revspec_registry)
 
95
revspec_registry.register_lazy("git:", __name__ + ".revspec",
 
96
    "RevisionSpec_git")
 
97
RevisionSpec_dwim.append_possible_lazy_revspec(
 
98
    __name__ + ".revspec", "RevisionSpec_git")
 
99
 
 
100
 
 
101
class LocalGitProber(Prober):
 
102
 
 
103
    def probe_transport(self, transport):
 
104
        try:
 
105
            external_url = transport.external_url()
 
106
        except brz_errors.InProcessTransport:
 
107
            raise brz_errors.NotBranchError(path=transport.base)
 
108
        if (external_url.startswith("http:") or
 
109
            external_url.startswith("https:")):
 
110
            # Already handled by RemoteGitProber
 
111
            raise brz_errors.NotBranchError(path=transport.base)
 
112
        from .. import urlutils
 
113
        if urlutils.split(transport.base)[1] == ".git":
 
114
            raise brz_errors.NotBranchError(path=transport.base)
 
115
        if not transport.has_any(['objects', '.git/objects', '.git']):
 
116
            raise brz_errors.NotBranchError(path=transport.base)
 
117
        lazy_check_versions()
 
118
        from .dir import (
 
119
            BareLocalGitControlDirFormat,
 
120
            LocalGitControlDirFormat,
 
121
            )
 
122
        if transport.has_any(['.git/objects', '.git']):
 
123
            return LocalGitControlDirFormat()
 
124
        if transport.has('info') and transport.has('objects'):
 
125
            return BareLocalGitControlDirFormat()
 
126
        raise brz_errors.NotBranchError(path=transport.base)
 
127
 
 
128
    @classmethod
 
129
    def known_formats(cls):
 
130
        from .dir import (
 
131
            BareLocalGitControlDirFormat,
 
132
            LocalGitControlDirFormat,
 
133
            )
 
134
        return [BareLocalGitControlDirFormat(), LocalGitControlDirFormat()]
 
135
 
 
136
 
 
137
def user_agent_for_github():
 
138
    # GitHub requires we lie. https://github.com/dulwich/dulwich/issues/562
 
139
    return "git/Breezy/%s" % breezy_version
 
140
 
 
141
 
 
142
class RemoteGitProber(Prober):
 
143
 
 
144
    def probe_http_transport(self, transport):
 
145
        from .. import urlutils
 
146
        base_url, _ = urlutils.split_segment_parameters(transport.external_url())
 
147
        url = urlutils.join(base_url, "info/refs") + "?service=git-upload-pack"
 
148
        from ..transport.http import Request
 
149
        headers = {"Content-Type": "application/x-git-upload-pack-request",
 
150
                   "Accept": "application/x-git-upload-pack-result",
 
151
                   }
 
152
        req = Request('GET', url, accepted_errors=[200, 403, 404, 405],
 
153
                      headers=headers)
 
154
        (scheme, user, password, host, port, path) = urlutils.parse_url(req.get_full_url())
 
155
        if host == "github.com":
 
156
            # GitHub requires we lie. https://github.com/dulwich/dulwich/issues/562
 
157
            req.add_header("User-Agent", user_agent_for_github())
 
158
        elif host == "bazaar.launchpad.net":
 
159
            # Don't attempt Git probes against bazaar.launchpad.net; pad.lv/1744830
 
160
            raise brz_errors.NotBranchError(transport.base)
 
161
        resp = transport._perform(req)
 
162
        if resp.code in (404, 405):
 
163
            raise brz_errors.NotBranchError(transport.base)
 
164
        headers = resp.headers
 
165
        ct = headers.get("Content-Type")
 
166
        if ct is None:
 
167
            raise brz_errors.NotBranchError(transport.base)
 
168
        if ct.startswith("application/x-git"):
 
169
            from .remote import RemoteGitControlDirFormat
 
170
            return RemoteGitControlDirFormat()
 
171
        else:
 
172
            from .dir import (
 
173
                BareLocalGitControlDirFormat,
 
174
                )
 
175
            ret = BareLocalGitControlDirFormat()
 
176
            ret._refs_text = resp.read()
 
177
            return ret
 
178
 
 
179
    def probe_transport(self, transport):
 
180
        try:
 
181
            external_url = transport.external_url()
 
182
        except brz_errors.InProcessTransport:
 
183
            raise brz_errors.NotBranchError(path=transport.base)
 
184
 
 
185
        if (external_url.startswith("http:") or
 
186
            external_url.startswith("https:")):
 
187
            return self.probe_http_transport(transport)
 
188
 
 
189
        if (not external_url.startswith("git://") and
 
190
            not external_url.startswith("git+")):
 
191
            raise brz_errors.NotBranchError(transport.base)
 
192
 
 
193
        # little ugly, but works
 
194
        from .remote import (
 
195
            GitSmartTransport,
 
196
            RemoteGitControlDirFormat,
 
197
            )
 
198
        if isinstance(transport, GitSmartTransport):
 
199
            return RemoteGitControlDirFormat()
 
200
        raise brz_errors.NotBranchError(path=transport.base)
 
201
 
 
202
    @classmethod
 
203
    def known_formats(cls):
 
204
        from .remote import RemoteGitControlDirFormat
 
205
        return [RemoteGitControlDirFormat()]
 
206
 
 
207
 
 
208
ControlDirFormat.register_prober(LocalGitProber)
 
209
ControlDirFormat._server_probers.append(RemoteGitProber)
 
210
 
 
211
register_transport_proto('git://',
 
212
        help="Access using the Git smart server protocol.")
 
213
register_transport_proto('git+ssh://',
 
214
        help="Access using the Git smart server protocol over SSH.")
 
215
 
 
216
register_lazy_transport("git://", __name__ + '.remote',
 
217
                        'TCPGitSmartTransport')
 
218
register_lazy_transport("git+ssh://", __name__ + '.remote',
 
219
                        'SSHGitSmartTransport')
 
220
 
 
221
 
 
222
plugin_cmds.register_lazy("cmd_git_import", [], __name__ + ".commands")
 
223
plugin_cmds.register_lazy("cmd_git_object", ["git-objects", "git-cat"],
 
224
    __name__ + ".commands")
 
225
plugin_cmds.register_lazy("cmd_git_refs", [], __name__ + ".commands")
 
226
plugin_cmds.register_lazy("cmd_git_apply", [], __name__ + ".commands")
 
227
plugin_cmds.register_lazy("cmd_git_push_pristine_tar_deltas",
 
228
        ['git-push-pristine-tar', 'git-push-pristine'],
 
229
    __name__ + ".commands")
 
230
 
 
231
def extract_git_foreign_revid(rev):
 
232
    try:
 
233
        foreign_revid = rev.foreign_revid
 
234
    except AttributeError:
 
235
        from .mapping import mapping_registry
 
236
        foreign_revid, mapping = \
 
237
            mapping_registry.parse_revision_id(rev.revision_id)
 
238
        return foreign_revid
 
239
    else:
 
240
        from .mapping import foreign_vcs_git
 
241
        if rev.mapping.vcs == foreign_vcs_git:
 
242
            return foreign_revid
 
243
        else:
 
244
            raise brz_errors.InvalidRevisionId(rev.revision_id, None)
 
245
 
 
246
 
 
247
def update_stanza(rev, stanza):
 
248
    mapping = getattr(rev, "mapping", None)
 
249
    try:
 
250
        git_commit = extract_git_foreign_revid(rev)
 
251
    except brz_errors.InvalidRevisionId:
 
252
        pass
 
253
    else:
 
254
        stanza.add("git-commit", git_commit)
 
255
 
 
256
from ..hooks import install_lazy_named_hook
 
257
install_lazy_named_hook("breezy.version_info_formats.format_rio",
 
258
    "RioVersionInfoBuilder.hooks", "revision", update_stanza,
 
259
    "git commits")
 
260
 
 
261
 
 
262
transport_server_registry.register_lazy('git',
 
263
    __name__ + '.server',
 
264
    'serve_git',
 
265
    'Git Smart server protocol over TCP. (default port: 9418)')
 
266
 
 
267
transport_server_registry.register_lazy('git-receive-pack',
 
268
    __name__ + '.server',
 
269
    'serve_git_receive_pack',
 
270
    help='Git Smart server receive pack command. (inetd mode only)')
 
271
transport_server_registry.register_lazy('git-upload-pack',
 
272
    __name__ + 'git.server',
 
273
    'serve_git_upload_pack',
 
274
    help='Git Smart server upload pack command. (inetd mode only)')
 
275
 
 
276
from ..repository import (
 
277
    format_registry as repository_format_registry,
 
278
    network_format_registry as repository_network_format_registry,
 
279
    )
 
280
repository_network_format_registry.register_lazy(b'git',
 
281
    __name__ + '.repository', 'GitRepositoryFormat')
 
282
 
 
283
register_extra_lazy_repository_format = getattr(repository_format_registry,
 
284
    "register_extra_lazy")
 
285
register_extra_lazy_repository_format(__name__ + '.repository',
 
286
    'GitRepositoryFormat')
 
287
 
 
288
from ..branch import (
 
289
    network_format_registry as branch_network_format_registry,
 
290
    )
 
291
branch_network_format_registry.register_lazy(b'git',
 
292
    __name__ + '.branch', 'LocalGitBranchFormat')
 
293
 
 
294
 
 
295
from ..branch import (
 
296
    format_registry as branch_format_registry,
 
297
    )
 
298
branch_format_registry.register_extra_lazy(
 
299
    __name__ + '.branch',
 
300
    'LocalGitBranchFormat',
 
301
    )
 
302
branch_format_registry.register_extra_lazy(
 
303
    __name__ + '.remote',
 
304
    'RemoteGitBranchFormat',
 
305
    )
 
306
 
 
307
 
 
308
from ..workingtree import (
 
309
    format_registry as workingtree_format_registry,
 
310
    )
 
311
workingtree_format_registry.register_extra_lazy(
 
312
    __name__ + '.workingtree',
 
313
    'GitWorkingTreeFormat',
 
314
    )
 
315
 
 
316
controldir_network_format_registry.register_lazy(b'git',
 
317
    __name__ + ".dir", "GitControlDirFormat")
 
318
 
 
319
 
 
320
from ..diff import format_registry as diff_format_registry
 
321
diff_format_registry.register_lazy('git', __name__ + '.send',
 
322
    'GitDiffTree', 'Git am-style diff format')
 
323
 
 
324
from ..send import (
 
325
    format_registry as send_format_registry,
 
326
    )
 
327
send_format_registry.register_lazy('git', __name__ + '.send',
 
328
                                   'send_git', 'Git am-style diff format')
 
329
 
 
330
from ..directory_service import directories
 
331
directories.register_lazy('github:', __name__ + '.directory',
 
332
                          'GitHubDirectory',
 
333
                          'GitHub directory.')
 
334
directories.register_lazy('git@github.com:', __name__ + '.directory',
 
335
                          'GitHubDirectory',
 
336
                          'GitHub directory.')
 
337
 
 
338
from ..help_topics import (
 
339
    topic_registry,
 
340
    )
 
341
topic_registry.register_lazy('git', __name__ + '.help', 'help_git',
 
342
    'Using Bazaar with Git')
 
343
 
 
344
from ..foreign import (
 
345
    foreign_vcs_registry,
 
346
    )
 
347
foreign_vcs_registry.register_lazy("git",
 
348
    __name__ + ".mapping", "foreign_vcs_git", "Stupid content tracker")
 
349
 
 
350
 
 
351
def update_git_cache(repository, revid):
 
352
    """Update the git cache after a local commit."""
 
353
    if getattr(repository, "_git", None) is not None:
 
354
        return # No need to update cache for git repositories
 
355
 
 
356
    if not repository.control_transport.has("git"):
 
357
        return # No existing cache, don't bother updating
 
358
    try:
 
359
        lazy_check_versions()
 
360
    except brz_errors.DependencyNotPresent as e:
 
361
        # dulwich is probably missing. silently ignore
 
362
        trace.mutter("not updating git map for %r: %s",
 
363
            repository, e)
 
364
 
 
365
    from .object_store import BazaarObjectStore
 
366
    store = BazaarObjectStore(repository)
 
367
    with store.lock_write():
 
368
        try:
 
369
            parent_revisions = set(repository.get_parent_map([revid])[revid])
 
370
        except KeyError:
 
371
            # Isn't this a bit odd - how can a revision that was just committed be missing?
 
372
            return
 
373
        missing_revisions = store._missing_revisions(parent_revisions)
 
374
        if not missing_revisions:
 
375
            store._cache.idmap.start_write_group()
 
376
            try:
 
377
                # Only update if the cache was up to date previously
 
378
                store._update_sha_map_revision(revid)
 
379
            except BaseException:
 
380
                store._cache.idmap.abort_write_group()
 
381
                raise
 
382
            else:
 
383
                store._cache.idmap.commit_write_group()
 
384
 
 
385
 
 
386
def post_commit_update_cache(local_branch, master_branch, old_revno, old_revid,
 
387
        new_revno, new_revid):
 
388
    if local_branch is not None:
 
389
        update_git_cache(local_branch.repository, new_revid)
 
390
    update_git_cache(master_branch.repository, new_revid)
 
391
 
 
392
 
 
393
def loggerhead_git_hook(branch_app, environ):
 
394
    branch = branch_app.branch
 
395
    config_stack = branch.get_config_stack()
 
396
    if config_stack.get('http_git'):
 
397
        return None
 
398
    from .server import git_http_hook
 
399
    return git_http_hook(branch, environ['REQUEST_METHOD'],
 
400
        environ['PATH_INFO'])
 
401
 
 
402
install_lazy_named_hook("breezy.branch",
 
403
    "Branch.hooks", "post_commit", post_commit_update_cache,
 
404
    "git cache")
 
405
install_lazy_named_hook("breezy.plugins.loggerhead.apps.branch",
 
406
    "BranchWSGIApp.hooks", "controller",
 
407
    loggerhead_git_hook, "git support")
 
408
 
 
409
 
 
410
from ..config import (
 
411
    option_registry,
 
412
    Option,
 
413
    bool_from_store,
 
414
    )
 
415
 
 
416
option_registry.register(
 
417
    Option('git.http',
 
418
           default=None, from_unicode=bool_from_store, invalid='warning',
 
419
           help='''\
 
420
Allow fetching of Git packs over HTTP.
 
421
 
 
422
This enables support for fetching Git packs over HTTP in Loggerhead.
 
423
'''))
 
424
 
 
425
def test_suite():
 
426
    from . import tests
 
427
    return tests.test_suite()