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  • Committer: Jelmer Vernooij
  • Date: 2020-05-06 02:13:25 UTC
  • mfrom: (7490.7.21 work)
  • mto: This revision was merged to the branch mainline in revision 7501.
  • Revision ID: jelmer@jelmer.uk-20200506021325-awbmmqu1zyorz7sj
Merge 3.1 branch.

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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
import os
 
26
import sys
 
27
 
 
28
dulwich_minimum_version = (0, 19, 11)
 
29
 
 
30
from .. import (  # noqa: F401
 
31
    __version__ as breezy_version,
 
32
    errors as brz_errors,
 
33
    trace,
 
34
    urlutils,
 
35
    version_info,
 
36
    )
 
37
 
 
38
from ..controldir import (
 
39
    ControlDirFormat,
 
40
    Prober,
 
41
    format_registry,
 
42
    network_format_registry as controldir_network_format_registry,
 
43
    )
 
44
 
 
45
from ..transport import (
 
46
    register_lazy_transport,
 
47
    register_transport_proto,
 
48
    transport_server_registry,
 
49
    )
 
50
from ..commands import (
 
51
    plugin_cmds,
 
52
    )
 
53
 
 
54
 
 
55
if getattr(sys, "frozen", None):
 
56
    # allow import additional libs from ./_lib for bzr.exe only
 
57
    sys.path.append(os.path.normpath(
 
58
        os.path.join(os.path.dirname(__file__), '_lib')))
 
59
 
 
60
 
 
61
def import_dulwich():
 
62
    try:
 
63
        from dulwich import __version__ as dulwich_version
 
64
    except ImportError:
 
65
        raise brz_errors.DependencyNotPresent(
 
66
            "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(
 
71
                "dulwich",
 
72
                "bzr-git: Dulwich is too old; at least %d.%d.%d is required" %
 
73
                dulwich_minimum_version)
 
74
 
 
75
 
 
76
_versions_checked = False
 
77
 
 
78
 
 
79
def lazy_check_versions():
 
80
    global _versions_checked
 
81
    if _versions_checked:
 
82
        return
 
83
    import_dulwich()
 
84
    _versions_checked = True
 
85
 
 
86
 
 
87
format_registry.register_lazy(
 
88
    'git', __name__ + ".dir", "LocalGitControlDirFormat",
 
89
    help='GIT repository.', native=False, experimental=False)
 
90
 
 
91
format_registry.register_lazy(
 
92
    'git-bare', __name__ + ".dir", "BareLocalGitControlDirFormat",
 
93
    help='Bare GIT repository (no working tree).', native=False,
 
94
    experimental=False)
 
95
 
 
96
from ..revisionspec import (RevisionSpec_dwim, revspec_registry)
 
97
revspec_registry.register_lazy("git:", __name__ + ".revspec",
 
98
                               "RevisionSpec_git")
 
99
RevisionSpec_dwim.append_possible_lazy_revspec(
 
100
    __name__ + ".revspec", "RevisionSpec_git")
 
101
 
 
102
 
 
103
class LocalGitProber(Prober):
 
104
 
 
105
    @classmethod
 
106
    def priority(klass, transport):
 
107
        return 10
 
108
 
 
109
    def probe_transport(self, transport):
 
110
        try:
 
111
            external_url = transport.external_url()
 
112
        except brz_errors.InProcessTransport:
 
113
            raise brz_errors.NotBranchError(path=transport.base)
 
114
        if (external_url.startswith("http:") or
 
115
                external_url.startswith("https:")):
 
116
            # Already handled by RemoteGitProber
 
117
            raise brz_errors.NotBranchError(path=transport.base)
 
118
        if urlutils.split(transport.base)[1] == ".git":
 
119
            raise brz_errors.NotBranchError(path=transport.base)
 
120
        if not transport.has_any(['objects', '.git/objects', '.git']):
 
121
            raise brz_errors.NotBranchError(path=transport.base)
 
122
        lazy_check_versions()
 
123
        from .dir import (
 
124
            BareLocalGitControlDirFormat,
 
125
            LocalGitControlDirFormat,
 
126
            )
 
127
        if transport.has_any(['.git/objects', '.git']):
 
128
            return LocalGitControlDirFormat()
 
129
        if transport.has('info') and transport.has('objects'):
 
130
            return BareLocalGitControlDirFormat()
 
131
        raise brz_errors.NotBranchError(path=transport.base)
 
132
 
 
133
    @classmethod
 
134
    def known_formats(cls):
 
135
        from .dir import (
 
136
            BareLocalGitControlDirFormat,
 
137
            LocalGitControlDirFormat,
 
138
            )
 
139
        return [BareLocalGitControlDirFormat(), LocalGitControlDirFormat()]
 
140
 
 
141
 
 
142
def user_agent_for_github():
 
143
    # GitHub requires we lie. https://github.com/dulwich/dulwich/issues/562
 
144
    return "git/Breezy/%s" % breezy_version
 
145
 
 
146
 
 
147
def is_github_url(url):
 
148
    (scheme, user, password, host, port,
 
149
     path) = urlutils.parse_url(url)
 
150
    return host in ("github.com", "gopkg.in")
 
151
 
 
152
 
 
153
class RemoteGitProber(Prober):
 
154
 
 
155
    @classmethod
 
156
    def priority(klass, transport):
 
157
        # This is a surprisingly good heuristic to determine whether this
 
158
        # prober is more likely to succeed than the Bazaar one.
 
159
        if 'git' in transport.base:
 
160
            return -15
 
161
        return -10
 
162
 
 
163
    def probe_http_transport(self, transport):
 
164
        # This function intentionally doesn't use any of the support code under
 
165
        # breezy.git, since it's called for every repository that's
 
166
        # accessed over HTTP, whether it's Git, Bzr or something else.
 
167
        # Importing Dulwich and the other support code adds unnecessray slowdowns.
 
168
        base_url = urlutils.strip_segment_parameters(transport.external_url())
 
169
        url = urlutils.URL.from_string(base_url)
 
170
        url.user = url.quoted_user = None
 
171
        url.password = url.quoted_password = None
 
172
        host = url.host
 
173
        url = urlutils.join(str(url), "info/refs") + "?service=git-upload-pack"
 
174
        headers = {"Content-Type": "application/x-git-upload-pack-request",
 
175
                   "Accept": "application/x-git-upload-pack-result",
 
176
                   }
 
177
        if is_github_url(url):
 
178
            # GitHub requires we lie.
 
179
            # https://github.com/dulwich/dulwich/issues/562
 
180
            headers["User-Agent"] = user_agent_for_github()
 
181
        elif host == "bazaar.launchpad.net":
 
182
            # Don't attempt Git probes against bazaar.launchpad.net; pad.lv/1744830
 
183
            raise brz_errors.NotBranchError(transport.base)
 
184
        resp = transport.request('GET', url, headers=headers)
 
185
        if resp.status in (404, 405):
 
186
            raise brz_errors.NotBranchError(transport.base)
 
187
        elif resp.status != 200:
 
188
            raise brz_errors.InvalidHttpResponse(
 
189
                url, 'Unable to handle http code %d' % resp.status)
 
190
 
 
191
        ct = resp.getheader("Content-Type")
 
192
        if ct and ct.startswith("application/x-git"):
 
193
            from .remote import RemoteGitControlDirFormat
 
194
            return RemoteGitControlDirFormat()
 
195
        elif not ct:
 
196
            from .dir import (
 
197
                BareLocalGitControlDirFormat,
 
198
                )
 
199
            ret = BareLocalGitControlDirFormat()
 
200
            ret._refs_text = resp.read()
 
201
            return ret
 
202
        raise brz_errors.NotBranchError(transport.base)
 
203
 
 
204
    def probe_transport(self, transport):
 
205
        try:
 
206
            external_url = transport.external_url()
 
207
        except brz_errors.InProcessTransport:
 
208
            raise brz_errors.NotBranchError(path=transport.base)
 
209
 
 
210
        if (external_url.startswith("http:") or
 
211
                external_url.startswith("https:")):
 
212
            return self.probe_http_transport(transport)
 
213
 
 
214
        if (not external_url.startswith("git://") and
 
215
                not external_url.startswith("git+")):
 
216
            raise brz_errors.NotBranchError(transport.base)
 
217
 
 
218
        # little ugly, but works
 
219
        from .remote import (
 
220
            GitSmartTransport,
 
221
            RemoteGitControlDirFormat,
 
222
            )
 
223
        if isinstance(transport, GitSmartTransport):
 
224
            return RemoteGitControlDirFormat()
 
225
        raise brz_errors.NotBranchError(path=transport.base)
 
226
 
 
227
    @classmethod
 
228
    def known_formats(cls):
 
229
        from .remote import RemoteGitControlDirFormat
 
230
        return [RemoteGitControlDirFormat()]
 
231
 
 
232
 
 
233
ControlDirFormat.register_prober(LocalGitProber)
 
234
ControlDirFormat.register_prober(RemoteGitProber)
 
235
 
 
236
register_transport_proto(
 
237
    'git://', help="Access using the Git smart server protocol.")
 
238
register_transport_proto(
 
239
    'git+ssh://',
 
240
    help="Access using the Git smart server protocol over SSH.")
 
241
 
 
242
register_lazy_transport("git://", __name__ + '.remote',
 
243
                        'TCPGitSmartTransport')
 
244
register_lazy_transport("git+ssh://", __name__ + '.remote',
 
245
                        'SSHGitSmartTransport')
 
246
 
 
247
 
 
248
plugin_cmds.register_lazy("cmd_git_import", [], __name__ + ".commands")
 
249
plugin_cmds.register_lazy("cmd_git_object", ["git-objects", "git-cat"],
 
250
                          __name__ + ".commands")
 
251
plugin_cmds.register_lazy("cmd_git_refs", [], __name__ + ".commands")
 
252
plugin_cmds.register_lazy("cmd_git_apply", [], __name__ + ".commands")
 
253
plugin_cmds.register_lazy("cmd_git_push_pristine_tar_deltas",
 
254
                          ['git-push-pristine-tar', 'git-push-pristine'],
 
255
                          __name__ + ".commands")
 
256
 
 
257
 
 
258
def extract_git_foreign_revid(rev):
 
259
    try:
 
260
        foreign_revid = rev.foreign_revid
 
261
    except AttributeError:
 
262
        from .mapping import mapping_registry
 
263
        foreign_revid, mapping = \
 
264
            mapping_registry.parse_revision_id(rev.revision_id)
 
265
        return foreign_revid
 
266
    else:
 
267
        from .mapping import foreign_vcs_git
 
268
        if rev.mapping.vcs == foreign_vcs_git:
 
269
            return foreign_revid
 
270
        else:
 
271
            raise brz_errors.InvalidRevisionId(rev.revision_id, None)
 
272
 
 
273
 
 
274
def update_stanza(rev, stanza):
 
275
    try:
 
276
        git_commit = extract_git_foreign_revid(rev)
 
277
    except brz_errors.InvalidRevisionId:
 
278
        pass
 
279
    else:
 
280
        stanza.add("git-commit", git_commit)
 
281
 
 
282
 
 
283
from ..hooks import install_lazy_named_hook
 
284
install_lazy_named_hook(
 
285
    "breezy.version_info_formats.format_rio",
 
286
    "RioVersionInfoBuilder.hooks", "revision", update_stanza,
 
287
    "git commits")
 
288
 
 
289
transport_server_registry.register_lazy(
 
290
    'git', __name__ + '.server', 'serve_git',
 
291
    'Git Smart server protocol over TCP. (default port: 9418)')
 
292
 
 
293
transport_server_registry.register_lazy(
 
294
    'git-receive-pack', __name__ + '.server',
 
295
    'serve_git_receive_pack',
 
296
    help='Git Smart server receive pack command. (inetd mode only)')
 
297
transport_server_registry.register_lazy(
 
298
    'git-upload-pack', __name__ + 'git.server',
 
299
    'serve_git_upload_pack',
 
300
    help='Git Smart server upload pack command. (inetd mode only)')
 
301
 
 
302
from ..repository import (
 
303
    format_registry as repository_format_registry,
 
304
    network_format_registry as repository_network_format_registry,
 
305
    )
 
306
repository_network_format_registry.register_lazy(
 
307
    b'git', __name__ + '.repository', 'GitRepositoryFormat')
 
308
 
 
309
register_extra_lazy_repository_format = getattr(repository_format_registry,
 
310
                                                "register_extra_lazy")
 
311
register_extra_lazy_repository_format(__name__ + '.repository',
 
312
                                      'GitRepositoryFormat')
 
313
 
 
314
from ..branch import (
 
315
    network_format_registry as branch_network_format_registry,
 
316
    )
 
317
branch_network_format_registry.register_lazy(
 
318
    b'git', __name__ + '.branch', 'LocalGitBranchFormat')
 
319
 
 
320
 
 
321
from ..branch import (
 
322
    format_registry as branch_format_registry,
 
323
    )
 
324
branch_format_registry.register_extra_lazy(
 
325
    __name__ + '.branch',
 
326
    'LocalGitBranchFormat',
 
327
    )
 
328
branch_format_registry.register_extra_lazy(
 
329
    __name__ + '.remote',
 
330
    'RemoteGitBranchFormat',
 
331
    )
 
332
 
 
333
 
 
334
from ..workingtree import (
 
335
    format_registry as workingtree_format_registry,
 
336
    )
 
337
workingtree_format_registry.register_extra_lazy(
 
338
    __name__ + '.workingtree',
 
339
    'GitWorkingTreeFormat',
 
340
    )
 
341
 
 
342
controldir_network_format_registry.register_lazy(
 
343
    b'git', __name__ + ".dir", "GitControlDirFormat")
 
344
 
 
345
 
 
346
from ..diff import format_registry as diff_format_registry
 
347
diff_format_registry.register_lazy(
 
348
    'git', __name__ + '.send',
 
349
    'GitDiffTree', 'Git am-style diff format')
 
350
 
 
351
from ..send import (
 
352
    format_registry as send_format_registry,
 
353
    )
 
354
send_format_registry.register_lazy('git', __name__ + '.send',
 
355
                                   'send_git', 'Git am-style diff format')
 
356
 
 
357
from ..directory_service import directories
 
358
directories.register_lazy('github:', __name__ + '.directory',
 
359
                          'GitHubDirectory',
 
360
                          'GitHub directory.')
 
361
directories.register_lazy('git@github.com:', __name__ + '.directory',
 
362
                          'GitHubDirectory',
 
363
                          'GitHub directory.')
 
364
 
 
365
from ..help_topics import (
 
366
    topic_registry,
 
367
    )
 
368
topic_registry.register_lazy(
 
369
    'git', __name__ + '.help', 'help_git', 'Using Bazaar with Git')
 
370
 
 
371
from ..foreign import (
 
372
    foreign_vcs_registry,
 
373
    )
 
374
foreign_vcs_registry.register_lazy(
 
375
    "git", __name__ + ".mapping", "foreign_vcs_git", "Stupid content tracker")
 
376
 
 
377
 
 
378
def update_git_cache(repository, revid):
 
379
    """Update the git cache after a local commit."""
 
380
    if getattr(repository, "_git", None) is not None:
 
381
        return  # No need to update cache for git repositories
 
382
 
 
383
    if not repository.control_transport.has("git"):
 
384
        return  # No existing cache, don't bother updating
 
385
    try:
 
386
        lazy_check_versions()
 
387
    except brz_errors.DependencyNotPresent as e:
 
388
        # dulwich is probably missing. silently ignore
 
389
        trace.mutter("not updating git map for %r: %s",
 
390
                     repository, e)
 
391
 
 
392
    from .object_store import BazaarObjectStore
 
393
    store = BazaarObjectStore(repository)
 
394
    with store.lock_write():
 
395
        try:
 
396
            parent_revisions = set(repository.get_parent_map([revid])[revid])
 
397
        except KeyError:
 
398
            # Isn't this a bit odd - how can a revision that was just committed
 
399
            # be missing?
 
400
            return
 
401
        missing_revisions = store._missing_revisions(parent_revisions)
 
402
        if not missing_revisions:
 
403
            store._cache.idmap.start_write_group()
 
404
            try:
 
405
                # Only update if the cache was up to date previously
 
406
                store._update_sha_map_revision(revid)
 
407
            except BaseException:
 
408
                store._cache.idmap.abort_write_group()
 
409
                raise
 
410
            else:
 
411
                store._cache.idmap.commit_write_group()
 
412
 
 
413
 
 
414
def post_commit_update_cache(local_branch, master_branch, old_revno, old_revid,
 
415
                             new_revno, new_revid):
 
416
    if local_branch is not None:
 
417
        update_git_cache(local_branch.repository, new_revid)
 
418
    update_git_cache(master_branch.repository, new_revid)
 
419
 
 
420
 
 
421
def loggerhead_git_hook(branch_app, environ):
 
422
    branch = branch_app.branch
 
423
    config_stack = branch.get_config_stack()
 
424
    if config_stack.get('http_git'):
 
425
        return None
 
426
    from .server import git_http_hook
 
427
    return git_http_hook(branch, environ['REQUEST_METHOD'],
 
428
                         environ['PATH_INFO'])
 
429
 
 
430
 
 
431
install_lazy_named_hook("breezy.branch",
 
432
                        "Branch.hooks", "post_commit",
 
433
                        post_commit_update_cache, "git cache")
 
434
install_lazy_named_hook("breezy.plugins.loggerhead.apps.branch",
 
435
                        "BranchWSGIApp.hooks", "controller",
 
436
                        loggerhead_git_hook, "git support")
 
437
 
 
438
 
 
439
from ..config import (
 
440
    option_registry,
 
441
    Option,
 
442
    bool_from_store,
 
443
    )
 
444
 
 
445
option_registry.register(
 
446
    Option('git.http',
 
447
           default=None, from_unicode=bool_from_store, invalid='warning',
 
448
           help='''\
 
449
Allow fetching of Git packs over HTTP.
 
450
 
 
451
This enables support for fetching Git packs over HTTP in Loggerhead.
 
452
'''))
 
453
 
 
454
 
 
455
def test_suite():
 
456
    from . import tests
 
457
    return tests.test_suite()