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- Committer: Jelmer Vernooij
- Date: 2010-09-11 17:48:45 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-20100911174845-ro06bb6gg6ws8jit
More work on roundtrip push support.
- files added:
- help.py
- files renamed:
- shamap.py => cache.py
- tests/test_shamap.py => tests/test_cache.py
- files modified:
- Makefile
added
removed
cache.py
23
23
import os
24
24
import threading
25
25
26
from dulwich.objects import (
27
ShaFile,
28
)
29
26
30
import bzrlib
27
31
from bzrlib import (
32
btree_index as _mod_btree_index,
33
index as _mod_index,
34
osutils,
35
registry,
28
36
trace,
37
versionedfile,
38
)
39
from bzrlib.transport import (
40
get_transport,
29
41
)
30
42
31
43
42
54
return ret
43
55
44
56
57
def get_remote_cache_transport():
58
"""Retrieve the transport to use when accessing (unwritable) remote
59
repositories.
60
"""
61
return get_transport(get_cache_dir())
62
63
45
64
def check_pysqlite_version(sqlite3):
46
65
"""Check that sqlite library is compatible.
47
66
75
94
return _mapdbs.cache
76
95
77
96
78
class InventorySHAMap(object):
79
"""Maps inventory file ids to Git SHAs."""
80
81
def lookup_blob(self, file_id, revision):
97
class GitShaMap(object):
98
"""Git<->Bzr revision id mapping database."""
99
100
def lookup_git_sha(self, sha):
101
"""Lookup a Git sha in the database.
102
:param sha: Git object sha
103
:return: (type, type_data) with type_data:
104
commit: revid, tree_sha, verifiers
105
blob: fileid, revid
106
tree: fileid, revid
107
"""
108
raise NotImplementedError(self.lookup_git_sha)
109
110
def lookup_blob_id(self, file_id, revision):
82
111
"""Retrieve a Git blob SHA by file id.
83
112
84
113
:param file_id: File id of the file/symlink
85
114
:param revision: revision in which the file was last changed.
86
115
"""
87
raise NotImplementedError(self.lookup_blob)
116
raise NotImplementedError(self.lookup_blob_id)
88
117
89
def lookup_tree(self, file_id):
118
def lookup_tree_id(self, file_id, revision):
90
119
"""Retrieve a Git tree SHA by file id.
91
120
"""
92
raise NotImplementedError(self.lookup_tree)
93
94
95
class GitShaMap(object):
96
"""Git<->Bzr revision id mapping database."""
97
98
def _add_entry(self, sha, type, type_data):
99
"""Add a new entry to the database.
100
"""
101
raise NotImplementedError(self._add_entry)
102
103
def add_entries(self, revid, parent_revids, commit_sha, root_tree_sha,
104
entries):
105
"""Add multiple new entries to the database.
106
"""
107
for (fileid, kind, hexsha, revision) in entries:
108
self._add_entry(hexsha, kind, (fileid, revision))
109
self._add_entry(commit_sha, "commit", (revid, root_tree_sha))
110
111
def get_inventory_sha_map(self, revid):
112
"""Return the inventory SHA map for a revision.
113
114
:param revid: Revision to fetch the map for
115
:return: A `InventorySHAMap`
116
"""
117
raise NotImplementedError(self.get_inventory_sha_map)
118
119
def lookup_git_sha(self, sha):
120
"""Lookup a Git sha in the database.
121
:param sha: Git object sha
122
:return: (type, type_data) with type_data:
123
revision: revid, tree sha
124
"""
125
raise NotImplementedError(self.lookup_git_sha)
121
raise NotImplementedError(self.lookup_tree_id)
126
122
127
123
def revids(self):
128
124
"""List the revision ids known."""
149
145
"""Abort any pending changes."""
150
146
151
147
148
class ContentCache(object):
149
"""Object that can cache Git objects."""
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
def __getitem__(self, sha):
161
"""Retrieve an item, by SHA."""
162
raise NotImplementedError(self.__getitem__)
163
164
165
class BzrGitCacheFormat(object):
166
"""Bazaar-Git Cache Format."""
167
168
def get_format_string(self):
169
"""Return a single-line unique format string for this cache format."""
170
raise NotImplementedError(self.get_format_string)
171
172
def open(self, transport):
173
"""Open this format on a transport."""
174
raise NotImplementedError(self.open)
175
176
def initialize(self, transport):
177
"""Create a new instance of this cache format at transport."""
178
transport.put_bytes('format', self.get_format_string())
179
180
@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
"""
187
try:
188
format_name = transport.get_bytes('format')
189
format = formats.get(format_name)
190
except bzrlib.errors.NoSuchFile:
191
format = formats.get('default')
192
format.initialize(transport)
193
return format.open(transport)
194
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
152
290
class DictGitShaMap(GitShaMap):
291
"""Git SHA map that uses a dictionary."""
153
292
154
293
def __init__(self):
155
294
self._by_sha = {}
156
295
self._by_fileid = {}
157
158
def _add_entry(self, sha, type, type_data):
159
self._by_sha[sha] = (type, type_data)
160
if type in ("blob", "tree"):
161
self._by_fileid.setdefault(type_data[1], {})[type_data[0]] = sha
162
163
def get_inventory_sha_map(self, revid):
164
165
class DictInventorySHAMap(InventorySHAMap):
166
167
def __init__(self, base, revid):
168
self._base = base
169
self.revid = revid
170
171
def lookup_blob(self, fileid, revision):
172
return self._base._by_fileid[revision][fileid]
173
174
def lookup_tree(self, fileid):
175
return self._base._by_fileid[self.revid][fileid]
176
177
return DictInventorySHAMap(self, revid)
296
self._by_revid = {}
297
298
def lookup_blob_id(self, fileid, revision):
299
return self._by_fileid[revision][fileid]
178
300
179
301
def lookup_git_sha(self, sha):
180
302
return self._by_sha[sha]
181
303
304
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]
309
182
310
def revids(self):
183
311
for key, (type, type_data) in self._by_sha.iteritems():
184
312
if type == "commit":
188
316
return self._by_sha.iterkeys()
189
317
190
318
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
class SqliteGitCacheFormat(BzrGitCacheFormat):
362
363
def get_format_string(self):
364
return 'bzr-git sha map version 1 using sqlite\n'
365
366
def open(self, transport):
367
try:
368
basepath = transport.local_abspath(".")
369
except bzrlib.errors.NotLocalUrl:
370
basepath = get_cache_dir()
371
return SqliteBzrGitCache(os.path.join(basepath, "idmap.db"))
372
373
191
374
class SqliteGitShaMap(GitShaMap):
375
"""Bazaar GIT Sha map that uses a sqlite database for storage."""
192
376
193
377
def __init__(self, path=None):
194
378
self.path = path
222
406
create unique index if not exists trees_sha1 on trees(sha1);
223
407
create unique index if not exists trees_fileid_revid on trees(fileid, revid);
224
408
""")
409
try:
410
self.db.executescript(
411
"ALTER TABLE commits ADD testament3_sha1 TEXT;")
412
except sqlite3.OperationalError:
413
pass # Column already exists.
225
414
226
415
def __repr__(self):
227
416
return "%s(%r)" % (self.__class__.__name__, self.path)
228
229
@classmethod
230
def from_repository(cls, repository):
231
try:
232
transport = getattr(repository, "_transport", None)
233
if transport is not None:
234
return cls(os.path.join(transport.local_abspath("."), "git.db"))
235
except bzrlib.errors.NotLocalUrl:
236
pass
237
return cls(os.path.join(get_cache_dir(), "remote.db"))
238
417
239
418
def lookup_commit(self, revid):
240
row = self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()
419
cursor = self.db.execute("select sha1 from commits where revid = ?",
420
(revid,))
421
row = cursor.fetchone()
241
422
if row is not None:
242
423
return row[0]
243
424
raise KeyError
245
426
def commit_write_group(self):
246
427
self.db.commit()
247
428
248
def add_entries(self, revid, parent_revids, commit_sha, root_tree_sha,
249
entries):
250
trees = []
251
blobs = []
252
for (fileid, kind, hexsha, revision) in entries:
253
if kind is None:
254
continue
255
if kind == "tree":
256
trees.append((hexsha, fileid, revid))
257
elif kind == "blob":
258
blobs.append((hexsha, fileid, revision))
259
else:
260
raise AssertionError
261
if trees:
262
self.db.executemany("replace into trees (sha1, fileid, revid) values (?, ?, ?)", trees)
263
if blobs:
264
self.db.executemany("replace into blobs (sha1, fileid, revid) values (?, ?, ?)", blobs)
265
self._add_entry(commit_sha, "commit", (revid, root_tree_sha))
266
267
def _add_entry(self, sha, type, type_data):
268
"""Add a new entry to the database.
269
"""
270
assert isinstance(type_data, tuple)
271
if sha is None:
272
return
273
assert isinstance(sha, str), "type was %r" % sha
274
if type == "commit":
275
self.db.execute("replace into commits (sha1, revid, tree_sha) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
276
elif type in ("blob", "tree"):
277
self.db.execute("replace into %ss (sha1, fileid, revid) values (?, ?, ?)" % type, (sha, type_data[0], type_data[1]))
278
else:
279
raise AssertionError("Unknown type %s" % type)
280
281
def get_inventory_sha_map(self, revid):
282
class SqliteInventorySHAMap(InventorySHAMap):
283
284
def __init__(self, db, revid):
285
self.db = db
286
self.revid = revid
287
288
def lookup_blob(self, fileid, revision):
289
row = self.db.execute("select sha1 from blobs where fileid = ? and revid = ?", (fileid, revision)).fetchone()
290
if row is not None:
291
return row[0]
292
raise KeyError(fileid)
293
294
def lookup_tree(self, fileid):
295
row = self.db.execute("select sha1 from trees where fileid = ? and revid = ?", (fileid, self.revid)).fetchone()
296
if row is not None:
297
return row[0]
298
raise KeyError(fileid)
299
300
return SqliteInventorySHAMap(self.db, revid)
429
def lookup_blob_id(self, fileid, revision):
430
row = self.db.execute("select sha1 from blobs where fileid = ? and revid = ?", (fileid, revision)).fetchone()
431
if row is not None:
432
return row[0]
433
raise KeyError(fileid)
434
435
def lookup_tree_id(self, fileid, revision):
436
row = self.db.execute("select sha1 from trees where fileid = ? and revid = ?", (fileid, revision)).fetchone()
437
if row is not None:
438
return row[0]
439
raise KeyError(fileid)
301
440
302
441
def lookup_git_sha(self, sha):
303
442
"""Lookup a Git sha in the database.
304
443
305
444
:param sha: Git object sha
306
445
:return: (type, type_data) with type_data:
307
revision: revid, tree sha
446
commit: revid, tree sha, verifiers
447
tree: fileid, revid
448
blob: fileid, revid
308
449
"""
309
def format(type, row):
310
return (type, (row[0], row[1]))
311
row = self.db.execute("select revid, tree_sha from commits where sha1 = ?", (sha,)).fetchone()
450
row = self.db.execute("select revid, tree_sha, testament3_sha1 from commits where sha1 = ?", (sha,)).fetchone()
312
451
if row is not None:
313
return format("commit", row)
452
return ("commit", (row[0], row[1], {"testament3-sha1": row[2]}))
314
453
row = self.db.execute("select fileid, revid from blobs where sha1 = ?", (sha,)).fetchone()
315
454
if row is not None:
316
return format("blob", row)
455
return ("blob", row)
317
456
row = self.db.execute("select fileid, revid from trees where sha1 = ?", (sha,)).fetchone()
318
457
if row is not None:
319
return format("tree", row)
458
return ("tree", row)
320
459
raise KeyError(sha)
321
460
322
461
def revids(self):
326
465
def sha1s(self):
327
466
"""List the SHA1s."""
328
467
for table in ("blobs", "commits", "trees"):
329
trace.note(table)
330
for (row,) in self.db.execute("select sha1 from %s" % table):
331
yield row
332
333
334
TDB_MAP_VERSION = 3
335
TDB_HASH_SIZE = 50000
468
for (sha,) in self.db.execute("select sha1 from %s" % table):
469
yield sha
470
471
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)
510
511
class TdbGitCacheFormat(BzrGitCacheFormat):
512
"""Cache format for tdb-based caches."""
513
514
def get_format_string(self):
515
return 'bzr-git sha map version 3 using tdb\n'
516
517
def open(self, transport):
518
try:
519
basepath = transport.local_abspath(".")
520
except bzrlib.errors.NotLocalUrl:
521
basepath = get_cache_dir()
522
try:
523
return TdbBzrGitCache(os.path.join(basepath, "idmap.tdb"))
524
except ImportError:
525
raise ImportError(
526
"Unable to open existing bzr-git cache because 'tdb' is not "
527
"installed.")
336
528
337
529
338
530
class TdbGitShaMap(GitShaMap):
346
538
"blob fileid revid" -> "<sha1>"
347
539
"""
348
540
541
TDB_MAP_VERSION = 3
542
TDB_HASH_SIZE = 50000
543
349
544
def __init__(self, path=None):
350
545
import tdb
351
546
self.path = path
353
548
self.db = {}
354
549
else:
355
550
if not mapdbs().has_key(path):
356
mapdbs()[path] = tdb.Tdb(path, TDB_HASH_SIZE, tdb.DEFAULT,
551
mapdbs()[path] = tdb.Tdb(path, self.TDB_HASH_SIZE, tdb.DEFAULT,
357
552
os.O_RDWR|os.O_CREAT)
358
553
self.db = mapdbs()[path]
359
554
try:
360
555
if int(self.db["version"]) not in (2, 3):
361
556
trace.warning("SHA Map is incompatible (%s -> %d), rebuilding database.",
362
self.db["version"], TDB_MAP_VERSION)
557
self.db["version"], self.TDB_MAP_VERSION)
363
558
self.db.clear()
364
559
except KeyError:
365
560
pass
366
self.db["version"] = str(TDB_MAP_VERSION)
561
self.db["version"] = str(self.TDB_MAP_VERSION)
367
562
368
563
def start_write_group(self):
369
564
"""Start writing changes."""
380
575
def __repr__(self):
381
576
return "%s(%r)" % (self.__class__.__name__, self.path)
382
577
383
@classmethod
384
def from_repository(cls, repository):
385
try:
386
transport = getattr(repository, "_transport", None)
387
if transport is not None:
388
return cls(os.path.join(transport.local_abspath("."), "git.tdb"))
389
except bzrlib.errors.NotLocalUrl:
390
pass
391
return cls(os.path.join(get_cache_dir(), "remote.tdb"))
392
393
578
def lookup_commit(self, revid):
394
579
return sha_to_hex(self.db["commit\0" + revid][:20])
395
580
396
def _add_entry(self, hexsha, type, type_data):
397
"""Add a new entry to the database.
398
"""
399
if hexsha is None:
400
sha = ""
401
else:
402
sha = hex_to_sha(hexsha)
403
self.db["git\0" + sha] = "\0".join((type, type_data[0], type_data[1]))
404
if type == "commit":
405
self.db["commit\0" + type_data[0]] = "\0".join((sha, type_data[1]))
406
elif type == "blob":
407
self.db["\0".join(("blob", type_data[0], type_data[1]))] = sha
408
409
def get_inventory_sha_map(self, revid):
410
411
class TdbInventorySHAMap(InventorySHAMap):
412
413
def __init__(self, db, revid):
414
self.db = db
415
self.revid = revid
416
417
def lookup_blob(self, fileid, revision):
418
return sha_to_hex(self.db["\0".join(("blob", fileid, revision))])
419
420
return TdbInventorySHAMap(self.db, revid)
581
def lookup_blob_id(self, fileid, revision):
582
return sha_to_hex(self.db["\0".join(("blob", fileid, revision))])
421
583
422
584
def lookup_git_sha(self, sha):
423
585
"""Lookup a Git sha in the database.
424
586
425
587
:param sha: Git object sha
426
588
:return: (type, type_data) with type_data:
427
revision: revid, tree sha
589
commit: revid, tree sha
590
blob: fileid, revid
591
tree: fileid, revid
428
592
"""
429
593
if len(sha) == 40:
430
594
sha = hex_to_sha(sha)
431
595
data = self.db["git\0" + sha].split("\0")
432
return (data[0], (data[1], data[2]))
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:]))
433
603
434
604
def missing_revisions(self, revids):
435
605
ret = set()
451
621
yield sha_to_hex(key[4:])
452
622
453
623
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
formats = registry.Registry()
880
formats.register(TdbGitCacheFormat().get_format_string(),
881
TdbGitCacheFormat())
882
formats.register(SqliteGitCacheFormat().get_format_string(),
883
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
try:
889
import tdb
890
except ImportError:
891
formats.register('default', SqliteGitCacheFormat())
892
else:
893
formats.register('default', TdbGitCacheFormat())
894
895
896
897
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"):
901
SqliteGitCacheFormat().initialize(repo_transport.clone("git"))
902
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
913
454
914
def from_repository(repository):
455
try:
456
return TdbGitShaMap.from_repository(repository)
457
except ImportError:
458
return SqliteGitShaMap.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
repo_transport = getattr(repository, "_transport", None)
924
if repo_transport is not None:
925
# Migrate older cache formats
926
repo_transport = remove_readonly_transport_decorator(repo_transport)
927
try:
928
repo_transport.mkdir("git")
929
except bzrlib.errors.FileExists:
930
pass
931
else:
932
migrate_ancient_formats(repo_transport)
933
return BzrGitCacheFormat.from_repository(repository)
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0