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- Committer: Jelmer Vernooij
- Date: 2010-04-02 14:18:06 UTC
- mto: (0.312.1 master) (6883.23.1 bundle-git)
- mto: This revision was merged to the branch mainline in revision 6960.
- Revision ID: jelmer@samba.org-20100402141806-9fapcdqre2iwdkk3
Remove pointless check.
- files removed:
- help.py
- files renamed:
- cache.py => shamap.py
- tests/test_cache.py => tests/test_shamap.py
- files modified:
- Makefile
added
removed
shamap.py
23
23
import os
24
24
import threading
25
25
26
from dulwich.objects import (
27
ShaFile,
28
)
29
30
26
import bzrlib
31
27
from bzrlib import (
32
btree_index as _mod_btree_index,
33
index as _mod_index,
34
osutils,
35
28
registry,
36
29
trace,
37
versionedfile,
38
30
)
39
31
from bzrlib.transport import (
40
32
get_transport,
55
47
56
48
57
49
def get_remote_cache_transport():
58
"""Retrieve the transport to use when accessing (unwritable) remote
59
repositories.
60
"""
61
50
return get_transport(get_cache_dir())
62
51
63
52
97
86
class GitShaMap(object):
98
87
"""Git<->Bzr revision id mapping database."""
99
88
89
def _add_entry(self, sha, type, type_data):
90
"""Add a new entry to the database.
91
"""
92
raise NotImplementedError(self._add_entry)
93
94
def add_entries(self, revid, parent_revids, commit_sha, root_tree_sha,
95
entries):
96
"""Add multiple new entries to the database.
97
"""
98
for (fileid, kind, hexsha, revision) in entries:
99
self._add_entry(hexsha, kind, (fileid, revision))
100
self._add_entry(commit_sha, "commit", (revid, root_tree_sha))
101
100
102
def lookup_git_sha(self, sha):
101
103
"""Lookup a Git sha in the database.
102
104
:param sha: Git object sha
103
105
:return: (type, type_data) with type_data:
104
commit: revid, tree_sha, verifiers
105
blob: fileid, revid
106
tree: fileid, revid
106
revision: revid, tree sha
107
107
"""
108
108
raise NotImplementedError(self.lookup_git_sha)
109
109
148
148
class ContentCache(object):
149
149
"""Object that can cache Git objects."""
150
150
151
def add(self, object):
152
"""Add an object."""
153
raise NotImplementedError(self.add)
154
155
def add_multi(self, objects):
156
"""Add multiple objects."""
157
for obj in objects:
158
self.add(obj)
159
160
151
def __getitem__(self, sha):
161
152
"""Retrieve an item, by SHA."""
162
153
raise NotImplementedError(self.__getitem__)
163
154
155
def add(self, obj):
156
"""Add an object to the cache."""
157
raise NotImplementedError(self.add)
158
164
159
165
160
class BzrGitCacheFormat(object):
166
"""Bazaar-Git Cache Format."""
167
161
168
162
def get_format_string(self):
169
"""Return a single-line unique format string for this cache format."""
170
163
raise NotImplementedError(self.get_format_string)
171
164
172
165
def open(self, transport):
173
"""Open this format on a transport."""
174
166
raise NotImplementedError(self.open)
175
167
176
168
def initialize(self, transport):
177
"""Create a new instance of this cache format at transport."""
178
169
transport.put_bytes('format', self.get_format_string())
179
170
180
171
@classmethod
181
def from_transport(self, transport):
182
"""Open a cache file present on a transport, or initialize one.
183
184
:param transport: Transport to use
185
:return: A BzrGitCache instance
186
"""
172
def from_repository(self, repository):
173
repo_transport = getattr(repository, "_transport", None)
174
if repo_transport is not None:
175
try:
176
repo_transport.mkdir('git')
177
except bzrlib.errors.FileExists:
178
pass
179
transport = repo_transport.clone('git')
180
else:
181
transport = get_remote_cache_transport()
187
182
try:
188
183
format_name = transport.get_bytes('format')
189
184
format = formats.get(format_name)
192
187
format.initialize(transport)
193
188
return format.open(transport)
194
189
195
@classmethod
196
def from_repository(cls, repository):
197
"""Open a cache file for a repository.
198
199
This will use the repository's transport to store the cache file, or
200
use the users global cache directory if the repository has no
201
transport associated with it.
202
203
:param repository: Repository to open the cache for
204
:return: A `BzrGitCache`
205
"""
206
repo_transport = getattr(repository, "_transport", None)
207
if repo_transport is not None:
208
# Even if we don't write to this repo, we should be able
209
# to update its cache.
210
repo_transport = remove_readonly_transport_decorator(repo_transport)
211
try:
212
repo_transport.mkdir('git')
213
except bzrlib.errors.FileExists:
214
pass
215
transport = repo_transport.clone('git')
216
else:
217
transport = get_remote_cache_transport()
218
return cls.from_transport(transport)
219
220
221
class CacheUpdater(object):
222
"""Base class for objects that can update a bzr-git cache."""
223
224
def add_object(self, obj, ie, path):
225
"""Add an object.
226
227
:param obj: Object type ("commit", "blob" or "tree")
228
:param ie: Inventory entry (for blob/tree) or testament_sha in case
229
of commit
230
:param path: Path of the object (optional)
231
"""
232
raise NotImplementedError(self.add_object)
233
234
def finish(self):
235
raise NotImplementedError(self.finish)
236
237
238
class BzrGitCache(object):
239
"""Caching backend."""
240
241
def __init__(self, idmap, content_cache, cache_updater_klass):
242
self.idmap = idmap
243
self.content_cache = content_cache
244
self._cache_updater_klass = cache_updater_klass
245
246
def get_updater(self, rev):
247
"""Update an object that implements the CacheUpdater interface for
248
updating this cache.
249
"""
250
return self._cache_updater_klass(self, rev)
251
252
253
DictBzrGitCache = lambda: BzrGitCache(DictGitShaMap(), None, DictCacheUpdater)
254
255
256
class DictCacheUpdater(CacheUpdater):
257
"""Cache updater for dict-based caches."""
258
259
def __init__(self, cache, rev):
260
self.cache = cache
261
self.revid = rev.revision_id
262
self.parent_revids = rev.parent_ids
263
self._commit = None
264
self._entries = []
265
266
def add_object(self, obj, ie, path):
267
if obj.type_name == "commit":
268
self._commit = obj
269
assert type(ie) is dict
270
type_data = (self.revid, self._commit.tree, ie)
271
self.cache.idmap._by_revid[self.revid] = obj.id
272
elif obj.type_name in ("blob", "tree"):
273
if ie is not None:
274
if obj.type_name == "blob":
275
revision = ie.revision
276
else:
277
revision = self.revid
278
type_data = (ie.file_id, revision)
279
self.cache.idmap._by_fileid.setdefault(type_data[1], {})[type_data[0]] = obj.id
280
else:
281
raise AssertionError
282
self.cache.idmap._by_sha[obj.id] = (obj.type_name, type_data)
283
284
def finish(self):
285
if self._commit is None:
286
raise AssertionError("No commit object added")
287
return self._commit
288
289
190
290
191
class DictGitShaMap(GitShaMap):
291
"""Git SHA map that uses a dictionary."""
292
192
293
193
def __init__(self):
294
194
self._by_sha = {}
295
195
self._by_fileid = {}
296
self._by_revid = {}
196
197
def _add_entry(self, sha, type, type_data):
198
self._by_sha[sha] = (type, type_data)
199
if type in ("blob", "tree"):
200
self._by_fileid.setdefault(type_data[1], {})[type_data[0]] = sha
297
201
298
202
def lookup_blob_id(self, fileid, revision):
299
203
return self._by_fileid[revision][fileid]
302
206
return self._by_sha[sha]
303
207
304
208
def lookup_tree_id(self, fileid, revision):
305
return self._by_fileid[revision][fileid]
306
307
def lookup_commit(self, revid):
308
return self._by_revid[revid]
209
return self._base._by_fileid[revision][fileid]
309
210
310
211
def revids(self):
311
212
for key, (type, type_data) in self._by_sha.iteritems():
316
217
return self._by_sha.iterkeys()
317
218
318
219
319
class SqliteCacheUpdater(CacheUpdater):
320
321
def __init__(self, cache, rev):
322
self.cache = cache
323
self.db = self.cache.idmap.db
324
self.revid = rev.revision_id
325
self._commit = None
326
self._trees = []
327
self._blobs = []
328
329
def add_object(self, obj, ie, path):
330
if obj.type_name == "commit":
331
self._commit = obj
332
self._testament3_sha1 = ie["testament3-sha1"]
333
assert type(ie) is dict
334
elif obj.type_name == "tree":
335
if ie is not None:
336
self._trees.append((obj.id, ie.file_id, self.revid))
337
elif obj.type_name == "blob":
338
if ie is not None:
339
self._blobs.append((obj.id, ie.file_id, ie.revision))
340
else:
341
raise AssertionError
342
343
def finish(self):
344
if self._commit is None:
345
raise AssertionError("No commit object added")
346
self.db.executemany(
347
"replace into trees (sha1, fileid, revid) values (?, ?, ?)",
348
self._trees)
349
self.db.executemany(
350
"replace into blobs (sha1, fileid, revid) values (?, ?, ?)",
351
self._blobs)
352
self.db.execute(
353
"replace into commits (sha1, revid, tree_sha, testament3_sha1) values (?, ?, ?, ?)",
354
(self._commit.id, self.revid, self._commit.tree, self._testament3_sha1))
355
return self._commit
356
357
358
SqliteBzrGitCache = lambda p: BzrGitCache(SqliteGitShaMap(p), None, SqliteCacheUpdater)
359
360
361
220
class SqliteGitCacheFormat(BzrGitCacheFormat):
362
221
363
222
def get_format_string(self):
368
227
basepath = transport.local_abspath(".")
369
228
except bzrlib.errors.NotLocalUrl:
370
229
basepath = get_cache_dir()
371
return SqliteBzrGitCache(os.path.join(basepath, "idmap.db"))
230
return SqliteGitShaMap(os.path.join(get_cache_dir(), "idmap.db")), None
372
231
373
232
374
233
class SqliteGitShaMap(GitShaMap):
375
"""Bazaar GIT Sha map that uses a sqlite database for storage."""
376
234
377
235
def __init__(self, path=None):
378
236
self.path = path
406
264
create unique index if not exists trees_sha1 on trees(sha1);
407
265
create unique index if not exists trees_fileid_revid on trees(fileid, revid);
408
266
""")
409
try:
410
self.db.executescript(
411
"ALTER TABLE commits ADD testament3_sha1 TEXT;")
412
except sqlite3.OperationalError:
413
pass # Column already exists.
414
267
415
268
def __repr__(self):
416
269
return "%s(%r)" % (self.__class__.__name__, self.path)
417
270
418
271
def lookup_commit(self, revid):
419
cursor = self.db.execute("select sha1 from commits where revid = ?",
420
(revid,))
421
row = cursor.fetchone()
272
row = self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()
422
273
if row is not None:
423
274
return row[0]
424
275
raise KeyError
426
277
def commit_write_group(self):
427
278
self.db.commit()
428
279
280
def add_entries(self, revid, parent_revids, commit_sha, root_tree_sha,
281
entries):
282
trees = []
283
blobs = []
284
for (fileid, kind, hexsha, revision) in entries:
285
if kind == "tree":
286
trees.append((hexsha, fileid, revid))
287
elif kind == "blob":
288
blobs.append((hexsha, fileid, revision))
289
else:
290
raise AssertionError
291
if trees:
292
self.db.executemany("replace into trees (sha1, fileid, revid) values (?, ?, ?)", trees)
293
if blobs:
294
self.db.executemany("replace into blobs (sha1, fileid, revid) values (?, ?, ?)", blobs)
295
self._add_entry(commit_sha, "commit", (revid, root_tree_sha))
296
297
def _add_entry(self, sha, type, type_data):
298
"""Add a new entry to the database.
299
"""
300
assert isinstance(type_data, tuple)
301
if sha is None:
302
return
303
assert isinstance(sha, str), "type was %r" % sha
304
if type == "commit":
305
self.db.execute("replace into commits (sha1, revid, tree_sha) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
306
elif type in ("blob", "tree"):
307
self.db.execute("replace into %ss (sha1, fileid, revid) values (?, ?, ?)" % type, (sha, type_data[0], type_data[1]))
308
else:
309
raise AssertionError("Unknown type %s" % type)
310
429
311
def lookup_blob_id(self, fileid, revision):
430
312
row = self.db.execute("select sha1 from blobs where fileid = ? and revid = ?", (fileid, revision)).fetchone()
431
313
if row is not None:
433
315
raise KeyError(fileid)
434
316
435
317
def lookup_tree_id(self, fileid, revision):
436
row = self.db.execute("select sha1 from trees where fileid = ? and revid = ?", (fileid, revision)).fetchone()
318
row = self.db.execute("select sha1 from trees where fileid = ? and revid = ?", (fileid, self.revid)).fetchone()
437
319
if row is not None:
438
320
return row[0]
439
321
raise KeyError(fileid)
443
325
444
326
:param sha: Git object sha
445
327
:return: (type, type_data) with type_data:
446
commit: revid, tree sha, verifiers
447
tree: fileid, revid
448
blob: fileid, revid
328
revision: revid, tree sha
449
329
"""
450
row = self.db.execute("select revid, tree_sha, testament3_sha1 from commits where sha1 = ?", (sha,)).fetchone()
330
row = self.db.execute("select revid, tree_sha from commits where sha1 = ?", (sha,)).fetchone()
451
331
if row is not None:
452
return ("commit", (row[0], row[1], {"testament3-sha1": row[2]}))
332
return ("commit", row)
453
333
row = self.db.execute("select fileid, revid from blobs where sha1 = ?", (sha,)).fetchone()
454
334
if row is not None:
455
335
return ("blob", row)
469
349
yield sha
470
350
471
351
472
class TdbCacheUpdater(CacheUpdater):
473
"""Cache updater for tdb-based caches."""
474
475
def __init__(self, cache, rev):
476
self.cache = cache
477
self.db = cache.idmap.db
478
self.revid = rev.revision_id
479
self.parent_revids = rev.parent_ids
480
self._commit = None
481
self._entries = []
482
483
def add_object(self, obj, ie, path):
484
sha = obj.sha().digest()
485
if obj.type_name == "commit":
486
self.db["commit\0" + self.revid] = "\0".join((sha, obj.tree))
487
assert type(ie) is dict, "was %r" % ie
488
type_data = (self.revid, obj.tree, ie["testament3-sha1"])
489
self._commit = obj
490
elif obj.type_name == "blob":
491
if ie is None:
492
return
493
self.db["\0".join(("blob", ie.file_id, ie.revision))] = sha
494
type_data = (ie.file_id, ie.revision)
495
elif obj.type_name == "tree":
496
if ie is None:
497
return
498
type_data = (ie.file_id, self.revid)
499
else:
500
raise AssertionError
501
self.db["git\0" + sha] = "\0".join((obj.type_name, ) + type_data)
502
503
def finish(self):
504
if self._commit is None:
505
raise AssertionError("No commit object added")
506
return self._commit
507
508
509
TdbBzrGitCache = lambda p: BzrGitCache(TdbGitShaMap(p), None, TdbCacheUpdater)
352
TDB_MAP_VERSION = 3
353
TDB_HASH_SIZE = 50000
354
510
355
511
356
class TdbGitCacheFormat(BzrGitCacheFormat):
512
"""Cache format for tdb-based caches."""
513
357
514
358
def get_format_string(self):
515
359
return 'bzr-git sha map version 3 using tdb\n'
520
364
except bzrlib.errors.NotLocalUrl:
521
365
basepath = get_cache_dir()
522
366
try:
523
return TdbBzrGitCache(os.path.join(basepath, "idmap.tdb"))
367
return (TdbGitShaMap(os.path.join(get_cache_dir(), "idmap.tdb")),
368
None)
524
369
except ImportError:
525
370
raise ImportError(
526
371
"Unable to open existing bzr-git cache because 'tdb' is not "
538
383
"blob fileid revid" -> "<sha1>"
539
384
"""
540
385
541
TDB_MAP_VERSION = 3
542
TDB_HASH_SIZE = 50000
543
544
386
def __init__(self, path=None):
545
387
import tdb
546
388
self.path = path
548
390
self.db = {}
549
391
else:
550
392
if not mapdbs().has_key(path):
551
mapdbs()[path] = tdb.Tdb(path, self.TDB_HASH_SIZE, tdb.DEFAULT,
393
mapdbs()[path] = tdb.Tdb(path, TDB_HASH_SIZE, tdb.DEFAULT,
552
394
os.O_RDWR|os.O_CREAT)
553
395
self.db = mapdbs()[path]
554
396
try:
555
397
if int(self.db["version"]) not in (2, 3):
556
398
trace.warning("SHA Map is incompatible (%s -> %d), rebuilding database.",
557
self.db["version"], self.TDB_MAP_VERSION)
399
self.db["version"], TDB_MAP_VERSION)
558
400
self.db.clear()
559
401
except KeyError:
560
402
pass
561
self.db["version"] = str(self.TDB_MAP_VERSION)
403
self.db["version"] = str(TDB_MAP_VERSION)
562
404
563
405
def start_write_group(self):
564
406
"""Start writing changes."""
575
417
def __repr__(self):
576
418
return "%s(%r)" % (self.__class__.__name__, self.path)
577
419
420
@classmethod
421
def from_repository(cls, repository):
422
try:
423
transport = getattr(repository, "_transport", None)
424
if transport is not None:
425
return cls(os.path.join(transport.local_abspath("."), "shamap.tdb"))
426
except bzrlib.errors.NotLocalUrl:
427
pass
428
return cls(os.path.join(get_cache_dir(), "remote.tdb"))
429
578
430
def lookup_commit(self, revid):
579
431
return sha_to_hex(self.db["commit\0" + revid][:20])
580
432
433
def _add_entry(self, hexsha, type, type_data):
434
"""Add a new entry to the database.
435
"""
436
if hexsha is None:
437
sha = ""
438
else:
439
sha = hex_to_sha(hexsha)
440
self.db["git\0" + sha] = "\0".join((type, type_data[0], type_data[1]))
441
if type == "commit":
442
self.db["commit\0" + type_data[0]] = "\0".join((sha, type_data[1]))
443
elif type == "blob":
444
self.db["\0".join(("blob", type_data[0], type_data[1]))] = sha
445
581
446
def lookup_blob_id(self, fileid, revision):
582
447
return sha_to_hex(self.db["\0".join(("blob", fileid, revision))])
583
448
584
449
def lookup_git_sha(self, sha):
585
450
"""Lookup a Git sha in the database.
586
451
587
452
:param sha: Git object sha
588
453
:return: (type, type_data) with type_data:
589
commit: revid, tree sha
590
blob: fileid, revid
591
tree: fileid, revid
454
revision: revid, tree sha
592
455
"""
593
456
if len(sha) == 40:
594
457
sha = hex_to_sha(sha)
595
458
data = self.db["git\0" + sha].split("\0")
596
if data[0] == "commit":
597
if len(data) == 3:
598
return (data[0], (data[1], data[2], {}))
599
else:
600
return (data[0], (data[1], data[2], {"testament3-sha1": data[3]}))
601
else:
602
return (data[0], tuple(data[1:]))
459
return (data[0], (data[1], data[2]))
603
460
604
461
def missing_revisions(self, revids):
605
462
ret = set()
621
478
yield sha_to_hex(key[4:])
622
479
623
480
624
class VersionedFilesContentCache(ContentCache):
625
626
def __init__(self, vf):
627
self._vf = vf
628
629
def add(self, obj):
630
self._vf.insert_record_stream(
631
[versionedfile.ChunkedContentFactory((obj.id,), [], None,
632
obj.as_legacy_object_chunks())])
633
634
def __getitem__(self, sha):
635
stream = self._vf.get_record_stream([(sha,)], 'unordered', True)
636
entry = stream.next()
637
if entry.storage_kind == 'absent':
638
raise KeyError(sha)
639
return ShaFile._parse_legacy_object(entry.get_bytes_as('fulltext'))
640
641
642
class GitObjectStoreContentCache(ContentCache):
643
644
def __init__(self, store):
645
self.store = store
646
647
def add_multi(self, objs):
648
self.store.add_objects(objs)
649
650
def add(self, obj, path):
651
self.store.add_object(obj)
652
653
def __getitem__(self, sha):
654
return self.store[sha]
655
656
657
class IndexCacheUpdater(CacheUpdater):
658
659
def __init__(self, cache, rev):
660
self.cache = cache
661
self.revid = rev.revision_id
662
self.parent_revids = rev.parent_ids
663
self._commit = None
664
self._entries = []
665
self._cache_objs = set()
666
667
def add_object(self, obj, ie, path):
668
if obj.type_name == "commit":
669
self._commit = obj
670
assert type(ie) is dict
671
self.cache.idmap._add_git_sha(obj.id, "commit",
672
(self.revid, obj.tree, ie))
673
self.cache.idmap._add_node(("commit", self.revid, "X"),
674
" ".join((obj.id, obj.tree)))
675
self._cache_objs.add((obj, path))
676
elif obj.type_name == "blob":
677
self.cache.idmap._add_git_sha(obj.id, "blob",
678
(ie.file_id, ie.revision))
679
self.cache.idmap._add_node(("blob", ie.file_id, ie.revision), obj.id)
680
if ie.kind == "symlink":
681
self._cache_objs.add((obj, path))
682
elif obj.type_name == "tree":
683
self.cache.idmap._add_git_sha(obj.id, "tree",
684
(ie.file_id, self.revid))
685
self._cache_objs.add((obj, path))
686
else:
687
raise AssertionError
688
689
def finish(self):
690
self.cache.content_cache.add_multi(self._cache_objs)
691
return self._commit
692
693
694
class IndexBzrGitCache(BzrGitCache):
695
696
def __init__(self, transport=None):
697
mapper = versionedfile.ConstantMapper("trees")
698
shamap = IndexGitShaMap(transport.clone('index'))
699
#trees_store = knit.make_file_factory(True, mapper)(transport)
700
#content_cache = VersionedFilesContentCache(trees_store)
701
from bzrlib.plugins.git.transportgit import TransportObjectStore
702
store = TransportObjectStore(transport.clone('objects'))
703
content_cache = GitObjectStoreContentCache(store)
704
super(IndexBzrGitCache, self).__init__(shamap, content_cache,
705
IndexCacheUpdater)
706
707
708
class IndexGitCacheFormat(BzrGitCacheFormat):
709
710
def get_format_string(self):
711
return 'bzr-git sha map with git object cache version 1\n'
712
713
def initialize(self, transport):
714
super(IndexGitCacheFormat, self).initialize(transport)
715
transport.mkdir('index')
716
transport.mkdir('objects')
717
from bzrlib.plugins.git.transportgit import TransportObjectStore
718
TransportObjectStore.init(transport.clone('objects'))
719
720
def open(self, transport):
721
return IndexBzrGitCache(transport)
722
723
724
class IndexGitShaMap(GitShaMap):
725
"""SHA Map that uses the Bazaar APIs to store a cache.
726
727
BTree Index file with the following contents:
728
729
("git", <sha1>) -> "<type> <type-data1> <type-data2>"
730
("commit", <revid>) -> "<sha1> <tree-id>"
731
("blob", <fileid>, <revid>) -> <sha1>
732
733
"""
734
735
def __init__(self, transport=None):
736
if transport is None:
737
self._transport = None
738
self._index = _mod_index.InMemoryGraphIndex(0, key_elements=3)
739
self._builder = self._index
740
else:
741
self._builder = None
742
self._transport = transport
743
self._index = _mod_index.CombinedGraphIndex([])
744
for name in self._transport.list_dir("."):
745
if not name.endswith(".rix"):
746
continue
747
x = _mod_btree_index.BTreeGraphIndex(self._transport, name,
748
self._transport.stat(name).st_size)
749
self._index.insert_index(0, x)
750
751
@classmethod
752
def from_repository(cls, repository):
753
transport = getattr(repository, "_transport", None)
754
if transport is not None:
755
try:
756
transport.mkdir('git')
757
except bzrlib.errors.FileExists:
758
pass
759
return cls(transport.clone('git'))
760
from bzrlib.transport import get_transport
761
return cls(get_transport(get_cache_dir()))
762
763
def __repr__(self):
764
if self._transport is not None:
765
return "%s(%r)" % (self.__class__.__name__, self._transport.base)
766
else:
767
return "%s()" % (self.__class__.__name__)
768
769
def repack(self):
770
assert self._builder is None
771
self.start_write_group()
772
for _, key, value in self._index.iter_all_entries():
773
self._builder.add_node(key, value)
774
to_remove = []
775
for name in self._transport.list_dir('.'):
776
if name.endswith('.rix'):
777
to_remove.append(name)
778
self.commit_write_group()
779
del self._index.indices[1:]
780
for name in to_remove:
781
self._transport.rename(name, name + '.old')
782
783
def start_write_group(self):
784
assert self._builder is None
785
self._builder = _mod_btree_index.BTreeBuilder(0, key_elements=3)
786
self._name = osutils.sha()
787
788
def commit_write_group(self):
789
assert self._builder is not None
790
stream = self._builder.finish()
791
name = self._name.hexdigest() + ".rix"
792
size = self._transport.put_file(name, stream)
793
index = _mod_btree_index.BTreeGraphIndex(self._transport, name, size)
794
self._index.insert_index(0, index)
795
self._builder = None
796
self._name = None
797
798
def abort_write_group(self):
799
assert self._builder is not None
800
self._builder = None
801
self._name = None
802
803
def _add_node(self, key, value):
804
try:
805
self._builder.add_node(key, value)
806
except bzrlib.errors.BadIndexDuplicateKey:
807
# Multiple bzr objects can have the same contents
808
return True
809
else:
810
return False
811
812
def _get_entry(self, key):
813
entries = self._index.iter_entries([key])
814
try:
815
return entries.next()[2]
816
except StopIteration:
817
if self._builder is None:
818
raise KeyError
819
entries = self._builder.iter_entries([key])
820
try:
821
return entries.next()[2]
822
except StopIteration:
823
raise KeyError
824
825
def _iter_keys_prefix(self, prefix):
826
for entry in self._index.iter_entries_prefix([prefix]):
827
yield entry[1]
828
if self._builder is not None:
829
for entry in self._builder.iter_entries_prefix([prefix]):
830
yield entry[1]
831
832
def lookup_commit(self, revid):
833
return self._get_entry(("commit", revid, "X"))[:40]
834
835
def _add_git_sha(self, hexsha, type, type_data):
836
if hexsha is not None:
837
self._name.update(hexsha)
838
if type == "commit":
839
td = (type_data[0], type_data[1], type_data[2]["testament3-sha1"])
840
else:
841
td = type_data
842
self._add_node(("git", hexsha, "X"), " ".join((type,) + td))
843
else:
844
# This object is not represented in Git - perhaps an empty
845
# directory?
846
self._name.update(type + " ".join(type_data))
847
848
def lookup_blob_id(self, fileid, revision):
849
return self._get_entry(("blob", fileid, revision))
850
851
def lookup_git_sha(self, sha):
852
if len(sha) == 20:
853
sha = sha_to_hex(sha)
854
data = self._get_entry(("git", sha, "X")).split(" ", 3)
855
if data[0] == "commit":
856
return ("commit", (data[1], data[2], {"testament3-sha1": data[3]}))
857
else:
858
return (data[0], tuple(data[1:]))
859
860
def revids(self):
861
"""List the revision ids known."""
862
for key in self._iter_keys_prefix(("commit", None, None)):
863
yield key[1]
864
865
def missing_revisions(self, revids):
866
"""Return set of all the revisions that are not present."""
867
missing_revids = set(revids)
868
for _, key, value in self._index.iter_entries((
869
("commit", revid, "X") for revid in revids)):
870
missing_revids.remove(key[1])
871
return missing_revids
872
873
def sha1s(self):
874
"""List the SHA1s."""
875
for key in self._iter_keys_prefix(("git", None, None)):
876
yield key[1]
877
878
879
481
formats = registry.Registry()
880
482
formats.register(TdbGitCacheFormat().get_format_string(),
881
483
TdbGitCacheFormat())
882
484
formats.register(SqliteGitCacheFormat().get_format_string(),
883
485
SqliteGitCacheFormat())
884
formats.register(IndexGitCacheFormat().get_format_string(),
885
IndexGitCacheFormat())
886
# In the future, this will become the default:
887
# formats.register('default', IndexGitCacheFormat())
888
486
try:
889
487
import tdb
890
488
except ImportError:
893
491
formats.register('default', TdbGitCacheFormat())
894
492
895
493
896
897
494
def migrate_ancient_formats(repo_transport):
898
# Prefer migrating git.db over git.tdb, since the latter may not
899
# be openable on some platforms.
900
if repo_transport.has("git.db"):
495
if repo_transport.has("git.tdb"):
496
TdbGitCacheFormat().initialize(repo_transport.clone("git"))
497
repo_transport.rename("git.tdb", "git/idmap.tdb")
498
elif repo_transport.has("git.db"):
901
499
SqliteGitCacheFormat().initialize(repo_transport.clone("git"))
902
500
repo_transport.rename("git.db", "git/idmap.db")
903
elif repo_transport.has("git.tdb"):
904
TdbGitCacheFormat().initialize(repo_transport.clone("git"))
905
repo_transport.rename("git.tdb", "git/idmap.tdb")
906
907
908
def remove_readonly_transport_decorator(transport):
909
if transport.is_readonly():
910
return transport._decorated
911
return transport
912
501
913
502
914
503
def from_repository(repository):
915
"""Open a cache file for a repository.
916
917
If the repository is remote and there is no transport available from it
918
this will use a local file in the users cache directory
919
(typically ~/.cache/bazaar/git/)
920
921
:param repository: A repository object
922
"""
923
504
repo_transport = getattr(repository, "_transport", None)
924
505
if repo_transport is not None:
925
506
# Migrate older cache formats
926
repo_transport = remove_readonly_transport_decorator(repo_transport)
927
507
try:
928
508
repo_transport.mkdir("git")
929
509
except bzrlib.errors.FileExists:
Loggerhead is a web-based interface for Breezy
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