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__init__.py
 
1
# Copyright (C) 2006-2009 Canonical Ltd
 
2
 
 
3
# Authors: Robert Collins <robert.collins@canonical.com>
 
4
#          Jelmer Vernooij <jelmer@samba.org>
 
5
#          John Carr <john.carr@unrouted.co.uk>
 
6
#
 
7
# This program is free software; you can redistribute it and/or modify
 
8
# it under the terms of the GNU General Public License as published by
 
9
# the Free Software Foundation; either version 2 of the License, or
 
10
# (at your option) any later version.
 
11
#
 
12
# This program is distributed in the hope that it will be useful,
 
13
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
14
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
15
# GNU General Public License for more details.
 
16
#
 
17
# You should have received a copy of the GNU General Public License
 
18
# along with this program; if not, write to the Free Software
 
19
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
20
 
 
21
 
 
22
"""A GIT branch and repository format implementation for bzr."""
 
23
 
 
24
from __future__ import absolute_import
 
25
 
 
26
import os
 
27
import sys
 
28
 
 
29
import breezy
 
30
 
 
31
from .info import (
 
32
    bzr_compatible_versions,
 
33
    bzr_plugin_version as version_info,
 
34
    dulwich_minimum_version,
 
35
    )
 
36
 
 
37
if version_info[3] == 'final':
 
38
    version_string = '%d.%d.%d' % version_info[:3]
 
39
else:
 
40
    version_string = '%d.%d.%d%s%d' % version_info
 
41
__version__ = version_string
 
42
 
 
43
if breezy.version_info[:3] not in bzr_compatible_versions:
 
44
    from ...errors import IncompatibleVersion
 
45
    raise IncompatibleVersion(breezy,
 
46
            bzr_compatible_versions, breezy.version_info[:3])
 
47
 
 
48
try:
 
49
    from ...i18n import load_plugin_translations
 
50
except ImportError: # No translations for bzr < 2.5
 
51
    gettext = lambda x: x
 
52
else:
 
53
    translation = load_plugin_translations("bzr-git")
 
54
    gettext = translation.gettext
 
55
 
 
56
from ... import (
 
57
    errors as bzr_errors,
 
58
    trace,
 
59
    )
 
60
 
 
61
from ...controldir import (
 
62
    ControlDirFormat,
 
63
    Prober,
 
64
    format_registry,
 
65
    network_format_registry as controldir_network_format_registry,
 
66
    )
 
67
 
 
68
from ...transport import (
 
69
    register_lazy_transport,
 
70
    register_transport_proto,
 
71
    transport_server_registry,
 
72
    )
 
73
from ...commands import (
 
74
    plugin_cmds,
 
75
    )
 
76
 
 
77
 
 
78
if getattr(sys, "frozen", None):
 
79
    # allow import additional libs from ./_lib for bzr.exe only
 
80
    sys.path.append(os.path.normpath(
 
81
        os.path.join(os.path.dirname(__file__), '_lib')))
 
82
 
 
83
 
 
84
def import_dulwich():
 
85
    try:
 
86
        from dulwich import __version__ as dulwich_version
 
87
    except ImportError:
 
88
        raise bzr_errors.DependencyNotPresent("dulwich",
 
89
            "bzr-git: Please install dulwich, https://launchpad.net/dulwich")
 
90
    else:
 
91
        if dulwich_version < dulwich_minimum_version:
 
92
            raise bzr_errors.DependencyNotPresent("dulwich",
 
93
                "bzr-git: Dulwich is too old; at least %d.%d.%d is required" %
 
94
                    dulwich_minimum_version)
 
95
 
 
96
 
 
97
_versions_checked = False
 
98
def lazy_check_versions():
 
99
    global _versions_checked
 
100
    if _versions_checked:
 
101
        return
 
102
    import_dulwich()
 
103
    _versions_checked = True
 
104
 
 
105
format_registry.register_lazy('git',
 
106
    __name__ + ".dir", "LocalGitControlDirFormat",
 
107
    help='GIT repository.', native=False, experimental=False,
 
108
    )
 
109
 
 
110
format_registry.register_lazy('git-bare',
 
111
    __name__ + ".dir", "BareLocalGitControlDirFormat",
 
112
    help='Bare GIT repository (no working tree).', native=False,
 
113
    experimental=False,
 
114
    )
 
115
 
 
116
from ...revisionspec import (RevisionSpec_dwim, revspec_registry)
 
117
revspec_registry.register_lazy("git:", __name__ + ".revspec",
 
118
    "RevisionSpec_git")
 
119
RevisionSpec_dwim.append_possible_lazy_revspec(
 
120
    __name__ + ".revspec", "RevisionSpec_git")
 
121
 
 
122
 
 
123
class LocalGitProber(Prober):
 
124
 
 
125
    def probe_transport(self, transport):
 
126
        try:
 
127
            external_url = transport.external_url()
 
128
        except bzr_errors.InProcessTransport:
 
129
            raise bzr_errors.NotBranchError(path=transport.base)
 
130
        if (external_url.startswith("http:") or
 
131
            external_url.startswith("https:")):
 
132
            # Already handled by RemoteGitProber
 
133
            raise bzr_errors.NotBranchError(path=transport.base)
 
134
        from ... import urlutils
 
135
        if urlutils.split(transport.base)[1] == ".git":
 
136
            raise bzr_errors.NotBranchError(path=transport.base)
 
137
        if not transport.has_any(['objects', '.git/objects']):
 
138
            raise bzr_errors.NotBranchError(path=transport.base)
 
139
        lazy_check_versions()
 
140
        from .dir import (
 
141
            BareLocalGitControlDirFormat,
 
142
            LocalGitControlDirFormat,
 
143
            )
 
144
        if transport.has_any(['.git/objects']):
 
145
            return LocalGitControlDirFormat()
 
146
        if transport.has('info') and transport.has('objects'):
 
147
            return BareLocalGitControlDirFormat()
 
148
        raise bzr_errors.NotBranchError(path=transport.base)
 
149
 
 
150
    @classmethod
 
151
    def known_formats(cls):
 
152
        from .dir import (
 
153
            BareLocalGitControlDirFormat,
 
154
            LocalGitControlDirFormat,
 
155
            )
 
156
        return set([BareLocalGitControlDirFormat(), LocalGitControlDirFormat()])
 
157
 
 
158
 
 
159
class RemoteGitProber(Prober):
 
160
 
 
161
    def probe_http_transport(self, transport):
 
162
        from ... import urlutils
 
163
        base_url, _ = urlutils.split_segment_parameters(transport.external_url())
 
164
        url = urlutils.join(base_url, "info/refs") + "?service=git-upload-pack"
 
165
        from ...transport.http._urllib import HttpTransport_urllib, Request
 
166
        if isinstance(transport, HttpTransport_urllib):
 
167
            req = Request('GET', url, accepted_errors=[200, 403, 404, 405],
 
168
                          headers={"Content-Type": "application/x-git-upload-pack-request"})
 
169
            req.follow_redirections = True
 
170
            resp = transport._perform(req)
 
171
            if resp.code in (404, 405):
 
172
                raise bzr_errors.NotBranchError(transport.base)
 
173
            headers = resp.headers
 
174
            refs_text = resp.read()
 
175
        else:
 
176
            try:
 
177
                from ...transport.http._pycurl import PyCurlTransport
 
178
            except bzr_errors.DependencyNotPresent:
 
179
                raise bzr_errors.NotBranchError(transport.base)
 
180
            else:
 
181
                import pycurl
 
182
                from cStringIO import StringIO
 
183
                if isinstance(transport, PyCurlTransport):
 
184
                    conn = transport._get_curl()
 
185
                    conn.setopt(pycurl.URL, url)
 
186
                    conn.setopt(pycurl.FOLLOWLOCATION, 1)
 
187
                    transport._set_curl_options(conn)
 
188
                    conn.setopt(pycurl.HTTPGET, 1)
 
189
                    header = StringIO()
 
190
                    data = StringIO()
 
191
                    conn.setopt(pycurl.HEADERFUNCTION, header.write)
 
192
                    conn.setopt(pycurl.WRITEFUNCTION, data.write)
 
193
                    transport._curl_perform(conn, header,
 
194
                        ["Content-Type: application/x-git-upload-pack-request"])
 
195
                    code = conn.getinfo(pycurl.HTTP_CODE)
 
196
                    if code in (404, 405):
 
197
                        raise bzr_errors.NotBranchError(transport.base)
 
198
                    if code != 200:
 
199
                        raise bzr_errors.InvalidHttpResponse(transport._path,
 
200
                            str(code))
 
201
                    headers = transport._parse_headers(header)
 
202
                else:
 
203
                    raise bzr_errors.NotBranchError(transport.base)
 
204
                refs_text = data.getvalue()
 
205
        ct = headers.getheader("Content-Type")
 
206
        if ct is None:
 
207
            raise bzr_errors.NotBranchError(transport.base)
 
208
        if ct.startswith("application/x-git"):
 
209
            from .remote import RemoteGitControlDirFormat
 
210
            return RemoteGitControlDirFormat()
 
211
        else:
 
212
            from .dir import (
 
213
                BareLocalGitControlDirFormat,
 
214
                )
 
215
            ret = BareLocalGitControlDirFormat()
 
216
            ret._refs_text = refs_text
 
217
            return ret
 
218
 
 
219
    def probe_transport(self, transport):
 
220
        try:
 
221
            external_url = transport.external_url()
 
222
        except bzr_errors.InProcessTransport:
 
223
            raise bzr_errors.NotBranchError(path=transport.base)
 
224
 
 
225
        if (external_url.startswith("http:") or
 
226
            external_url.startswith("https:")):
 
227
            return self.probe_http_transport(transport)
 
228
 
 
229
        if (not external_url.startswith("git://") and
 
230
            not external_url.startswith("git+")):
 
231
            raise bzr_errors.NotBranchError(transport.base)
 
232
 
 
233
        # little ugly, but works
 
234
        from .remote import (
 
235
            GitSmartTransport,
 
236
            RemoteGitControlDirFormat,
 
237
            )
 
238
        if isinstance(transport, GitSmartTransport):
 
239
            return RemoteGitControlDirFormat()
 
240
        raise bzr_errors.NotBranchError(path=transport.base)
 
241
 
 
242
    @classmethod
 
243
    def known_formats(cls):
 
244
        from .remote import RemoteGitControlDirFormat
 
245
        return set([RemoteGitControlDirFormat()])
 
246
 
 
247
 
 
248
ControlDirFormat.register_prober(LocalGitProber)
 
249
ControlDirFormat._server_probers.append(RemoteGitProber)
 
250
 
 
251
register_transport_proto('git://',
 
252
        help="Access using the Git smart server protocol.")
 
253
register_transport_proto('git+ssh://',
 
254
        help="Access using the Git smart server protocol over SSH.")
 
255
 
 
256
register_lazy_transport("git://", __name__ + '.remote',
 
257
                        'TCPGitSmartTransport')
 
258
register_lazy_transport("git+ssh://", __name__ + '.remote',
 
259
                        'SSHGitSmartTransport')
 
260
 
 
261
 
 
262
plugin_cmds.register_lazy("cmd_git_import", [], __name__ + ".commands")
 
263
plugin_cmds.register_lazy("cmd_git_object", ["git-objects", "git-cat"],
 
264
    __name__ + ".commands")
 
265
plugin_cmds.register_lazy("cmd_git_refs", [], __name__ + ".commands")
 
266
plugin_cmds.register_lazy("cmd_git_apply", [], __name__ + ".commands")
 
267
plugin_cmds.register_lazy("cmd_git_push_pristine_tar_deltas",
 
268
        ['git-push-pristine-tar', 'git-push-pristine'],
 
269
    __name__ + ".commands")
 
270
 
 
271
def extract_git_foreign_revid(rev):
 
272
    try:
 
273
        foreign_revid = rev.foreign_revid
 
274
    except AttributeError:
 
275
        from .mapping import mapping_registry
 
276
        foreign_revid, mapping = \
 
277
            mapping_registry.parse_revision_id(rev.revision_id)
 
278
        return foreign_revid
 
279
    else:
 
280
        from .mapping import foreign_vcs_git
 
281
        if rev.mapping.vcs == foreign_vcs_git:
 
282
            return foreign_revid
 
283
        else:
 
284
            raise bzr_errors.InvalidRevisionId(rev.revision_id, None)
 
285
 
 
286
 
 
287
def update_stanza(rev, stanza):
 
288
    mapping = getattr(rev, "mapping", None)
 
289
    try:
 
290
        git_commit = extract_git_foreign_revid(rev)
 
291
    except bzr_errors.InvalidRevisionId:
 
292
        pass
 
293
    else:
 
294
        stanza.add("git-commit", git_commit)
 
295
 
 
296
from ...hooks import install_lazy_named_hook
 
297
install_lazy_named_hook("breezy.version_info_formats.format_rio",
 
298
    "RioVersionInfoBuilder.hooks", "revision", update_stanza,
 
299
    "git commits")
 
300
 
 
301
 
 
302
transport_server_registry.register_lazy('git',
 
303
    __name__ + '.server',
 
304
    'serve_git',
 
305
    'Git Smart server protocol over TCP. (default port: 9418)')
 
306
 
 
307
transport_server_registry.register_lazy('git-receive-pack',
 
308
    __name__ + '.server',
 
309
    'serve_git_receive_pack',
 
310
    help='Git Smart server receive pack command. (inetd mode only)')
 
311
transport_server_registry.register_lazy('git-upload-pack',
 
312
    __name__ + 'git.server',
 
313
    'serve_git_upload_pack',
 
314
    help='Git Smart server upload pack command. (inetd mode only)')
 
315
 
 
316
from ...repository import (
 
317
    format_registry as repository_format_registry,
 
318
    network_format_registry as repository_network_format_registry,
 
319
    )
 
320
repository_network_format_registry.register_lazy('git',
 
321
    __name__ + '.repository', 'GitRepositoryFormat')
 
322
 
 
323
register_extra_lazy_repository_format = getattr(repository_format_registry,
 
324
    "register_extra_lazy")
 
325
register_extra_lazy_repository_format(__name__ + '.repository',
 
326
    'GitRepositoryFormat')
 
327
 
 
328
from ...branch import (
 
329
    network_format_registry as branch_network_format_registry,
 
330
    )
 
331
branch_network_format_registry.register_lazy('git',
 
332
    __name__ + '.branch', 'GitBranchFormat')
 
333
 
 
334
from ...branch import (
 
335
    format_registry as branch_format_registry,
 
336
    )
 
337
branch_format_registry.register_extra_lazy(
 
338
    __name__ + '.branch',
 
339
    'GitBranchFormat',
 
340
    )
 
341
 
 
342
from ...workingtree import (
 
343
    format_registry as workingtree_format_registry,
 
344
    )
 
345
workingtree_format_registry.register_extra_lazy(
 
346
    __name__ + '.workingtree',
 
347
    'GitWorkingTreeFormat',
 
348
    )
 
349
 
 
350
controldir_network_format_registry.register_lazy('git',
 
351
    __name__ + ".dir", "GitControlDirFormat")
 
352
 
 
353
 
 
354
try:
 
355
    from ...registry import register_lazy
 
356
except ImportError:
 
357
    from ...diff import format_registry as diff_format_registry
 
358
    diff_format_registry.register_lazy('git', __name__ + '.send',
 
359
        'GitDiffTree', 'Git am-style diff format')
 
360
 
 
361
    from ...send import (
 
362
        format_registry as send_format_registry,
 
363
        )
 
364
    send_format_registry.register_lazy('git', __name__ + '.send',
 
365
                                       'send_git', 'Git am-style diff format')
 
366
 
 
367
    from ...directory_service import directories
 
368
    directories.register_lazy('github:', __name__ + '.directory',
 
369
                              'GitHubDirectory',
 
370
                              'GitHub directory.')
 
371
    directories.register_lazy('git@github.com:', __name__ + '.directory',
 
372
                              'GitHubDirectory',
 
373
                              'GitHub directory.')
 
374
 
 
375
    from ...help_topics import (
 
376
        topic_registry,
 
377
        )
 
378
    topic_registry.register_lazy('git', __name__ + '.help', 'help_git',
 
379
        'Using Bazaar with Git')
 
380
 
 
381
    from ...foreign import (
 
382
        foreign_vcs_registry,
 
383
        )
 
384
    foreign_vcs_registry.register_lazy("git",
 
385
        __name__ + ".mapping", "foreign_vcs_git", "Stupid content tracker")
 
386
else:
 
387
    register_lazy("breezy.diff", "format_registry",
 
388
        'git', __name__ + '.send', 'GitDiffTree',
 
389
        'Git am-style diff format')
 
390
    register_lazy("breezy.send", "format_registry",
 
391
        'git', __name__ + '.send', 'send_git',
 
392
        'Git am-style diff format')
 
393
    register_lazy('breezy.directory_service', 'directories', 'github:',
 
394
            __name__ + '.directory', 'GitHubDirectory',
 
395
            'GitHub directory.')
 
396
    register_lazy('breezy.directory_service', 'directories',
 
397
            'git@github.com:', __name__ + '.directory',
 
398
            'GitHubDirectory', 'GitHub directory.')
 
399
    register_lazy('breezy.help_topics', 'topic_registry',
 
400
            'git', __name__ + '.help', 'help_git',
 
401
            'Using Bazaar with Git')
 
402
    register_lazy('breezy.foreign', 'foreign_vcs_registry', "git",
 
403
        __name__ + ".mapping", "foreign_vcs_git", "Stupid content tracker")
 
404
 
 
405
def update_git_cache(repository, revid):
 
406
    """Update the git cache after a local commit."""
 
407
    if getattr(repository, "_git", None) is not None:
 
408
        return # No need to update cache for git repositories
 
409
 
 
410
    if not repository.control_transport.has("git"):
 
411
        return # No existing cache, don't bother updating
 
412
    try:
 
413
        lazy_check_versions()
 
414
    except bzr_errors.DependencyNotPresent, e:
 
415
        # dulwich is probably missing. silently ignore
 
416
        trace.mutter("not updating git map for %r: %s",
 
417
            repository, e)
 
418
 
 
419
    from .object_store import BazaarObjectStore
 
420
    store = BazaarObjectStore(repository)
 
421
    store.lock_write()
 
422
    try:
 
423
        try:
 
424
            parent_revisions = set(repository.get_parent_map([revid])[revid])
 
425
        except KeyError:
 
426
            # Isn't this a bit odd - how can a revision that was just committed be missing?
 
427
            return
 
428
        missing_revisions = store._missing_revisions(parent_revisions)
 
429
        if not missing_revisions:
 
430
            # Only update if the cache was up to date previously
 
431
            store._update_sha_map_revision(revid)
 
432
    finally:
 
433
        store.unlock()
 
434
 
 
435
 
 
436
def post_commit_update_cache(local_branch, master_branch, old_revno, old_revid,
 
437
        new_revno, new_revid):
 
438
    if local_branch is not None:
 
439
        update_git_cache(local_branch.repository, new_revid)
 
440
    update_git_cache(master_branch.repository, new_revid)
 
441
 
 
442
 
 
443
def loggerhead_git_hook(branch_app, environ):
 
444
    branch = branch_app.branch
 
445
    config_stack = branch.get_config_stack()
 
446
    if config_stack.get('http_git'):
 
447
        return None
 
448
    from .server import git_http_hook
 
449
    return git_http_hook(branch, environ['REQUEST_METHOD'],
 
450
        environ['PATH_INFO'])
 
451
 
 
452
install_lazy_named_hook("breezy.branch",
 
453
    "Branch.hooks", "post_commit", post_commit_update_cache,
 
454
    "git cache")
 
455
install_lazy_named_hook("breezy.plugins.loggerhead.apps.branch",
 
456
    "BranchWSGIApp.hooks", "controller",
 
457
    loggerhead_git_hook, "git support")
 
458
 
 
459
 
 
460
from ...config import (
 
461
    option_registry,
 
462
    Option,
 
463
    bool_from_store,
 
464
    )
 
465
 
 
466
option_registry.register(
 
467
    Option('git.http',
 
468
           default=None, from_unicode=bool_from_store, invalid='warning',
 
469
           help='''\
 
470
Allow fetching of Git packs over HTTP.
 
471
 
 
472
This enables support for fetching Git packs over HTTP in Loggerhead.
 
473
'''))
 
474
 
 
475
def test_suite():
 
476
    from . import tests
 
477
    return tests.test_suite()