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- Committer: Jelmer Vernooij
- Date: 2009-04-09 22:34:59 UTC
- mfrom: (0.232.2 trunk)
- 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-20090409223459-dwfyazqm1ic7pwuc
merge new bzr-foreign.
- files added:
- foreign
- files removed:
- NEWS
- files renamed:
- object_store.py => converter.py
- cache.py => shamap.py
- tests/test_cache.py => tests/test_shamap.py
- files modified:
- HACKING
added
removed
shamap.py
16
16
17
17
"""Map from Git sha's to Bazaar objects."""
18
18
19
from dulwich.objects import (
20
sha_to_hex,
21
hex_to_sha,
22
)
23
19
import os
24
import threading
25
26
from dulwich.objects import (
27
ShaFile,
28
)
29
20
30
21
import bzrlib
31
from bzrlib import (
32
btree_index as _mod_btree_index,
33
index as _mod_index,
34
osutils,
35
registry,
36
trace,
37
versionedfile,
38
)
39
from bzrlib.transport import (
40
get_transport,
41
)
42
43
44
def get_cache_dir():
45
try:
46
from xdg.BaseDirectory import xdg_cache_home
47
except ImportError:
48
from bzrlib.config import config_dir
49
ret = os.path.join(config_dir(), "git")
50
else:
51
ret = os.path.join(xdg_cache_home, "bazaar", "git")
52
if not os.path.isdir(ret):
53
os.makedirs(ret)
54
return ret
55
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())
22
from bzrlib.errors import (
23
NoSuchRevision,
24
)
62
25
63
26
64
27
def check_pysqlite_version(sqlite3):
65
28
"""Check that sqlite library is compatible.
66
29
67
30
"""
68
if (sqlite3.sqlite_version_info[0] < 3 or
69
(sqlite3.sqlite_version_info[0] == 3 and
31
if (sqlite3.sqlite_version_info[0] < 3 or
32
(sqlite3.sqlite_version_info[0] == 3 and
70
33
sqlite3.sqlite_version_info[1] < 3)):
71
trace.warning('Needs at least sqlite 3.3.x')
34
warning('Needs at least sqlite 3.3.x')
72
35
raise bzrlib.errors.BzrError("incompatible sqlite library")
73
36
74
37
try:
75
38
try:
76
39
import sqlite3
77
40
check_pysqlite_version(sqlite3)
78
except (ImportError, bzrlib.errors.BzrError), e:
41
except (ImportError, bzrlib.errors.BzrError), e:
79
42
from pysqlite2 import dbapi2 as sqlite3
80
43
check_pysqlite_version(sqlite3)
81
44
except:
82
trace.warning('Needs at least Python2.5 or Python2.4 with the pysqlite2 '
45
warning('Needs at least Python2.5 or Python2.4 with the pysqlite2 '
83
46
'module')
84
47
raise bzrlib.errors.BzrError("missing sqlite library")
85
48
86
49
87
_mapdbs = threading.local()
88
def mapdbs():
89
"""Get a cache for this thread's db connections."""
90
try:
91
return _mapdbs.cache
92
except AttributeError:
93
_mapdbs.cache = {}
94
return _mapdbs.cache
95
96
97
50
class GitShaMap(object):
98
51
"""Git<->Bzr revision id mapping database."""
99
52
53
def add_entry(self, sha, type, type_data):
54
"""Add a new entry to the database.
55
"""
56
raise NotImplementedError(self.add_entry)
57
58
def lookup_tree(self, path, revid):
59
"""Lookup the SHA of a git tree."""
60
raise NotImplementedError(self.lookup_tree)
61
62
def lookup_blob(self, fileid, revid):
63
raise NotImplementedError(self.lookup_blob)
64
100
65
def lookup_git_sha(self, sha):
101
66
"""Lookup a Git sha in the database.
67
102
68
:param sha: Git object sha
103
69
:return: (type, type_data) with type_data:
104
commit: revid, tree_sha, verifiers
105
blob: fileid, revid
106
tree: fileid, revid
70
revision: revid, tree sha
107
71
"""
108
72
raise NotImplementedError(self.lookup_git_sha)
109
73
110
def lookup_blob_id(self, file_id, revision):
111
"""Retrieve a Git blob SHA by file id.
112
113
:param file_id: File id of the file/symlink
114
:param revision: revision in which the file was last changed.
115
"""
116
raise NotImplementedError(self.lookup_blob_id)
117
118
def lookup_tree_id(self, file_id, revision):
119
"""Retrieve a Git tree SHA by file id.
120
"""
121
raise NotImplementedError(self.lookup_tree_id)
122
123
74
def revids(self):
124
75
"""List the revision ids known."""
125
76
raise NotImplementedError(self.revids)
126
77
127
def missing_revisions(self, revids):
128
"""Return set of all the revisions that are not present."""
129
present_revids = set(self.revids())
130
if not isinstance(revids, set):
131
revids = set(revids)
132
return revids - present_revids
133
134
def sha1s(self):
135
"""List the SHA1s."""
136
raise NotImplementedError(self.sha1s)
137
138
def start_write_group(self):
139
"""Start writing changes."""
140
141
def commit_write_group(self):
78
def commit(self):
142
79
"""Commit any pending changes."""
143
80
144
def abort_write_group(self):
145
"""Abort any pending changes."""
146
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
81
290
82
class DictGitShaMap(GitShaMap):
291
"""Git SHA map that uses a dictionary."""
292
83
293
84
def __init__(self):
294
self._by_sha = {}
295
self._by_fileid = {}
296
self._by_revid = {}
85
self.dict = {}
297
86
298
def lookup_blob_id(self, fileid, revision):
299
return self._by_fileid[revision][fileid]
87
def add_entry(self, sha, type, type_data):
88
self.dict[sha] = (type, type_data)
300
89
301
90
def lookup_git_sha(self, sha):
302
return self._by_sha[sha]
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]
91
return self.dict[sha]
92
93
def lookup_tree(self, path, revid):
94
for k, v in self.dict.iteritems():
95
if v == ("tree", (path, revid)):
96
return k
97
raise KeyError((path, revid))
98
99
def lookup_blob(self, fileid, revid):
100
for k, v in self.dict.iteritems():
101
if v == ("blob", (fileid, revid)):
102
return k
103
raise KeyError((fileid, revid))
309
104
310
105
def revids(self):
311
for key, (type, type_data) in self._by_sha.iteritems():
106
for key, (type, type_data) in self.dict.iteritems():
312
107
if type == "commit":
313
108
yield type_data[0]
314
109
315
def sha1s(self):
316
return self._by_sha.iterkeys()
317
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
110
374
111
class SqliteGitShaMap(GitShaMap):
375
"""Bazaar GIT Sha map that uses a sqlite database for storage."""
376
112
377
def __init__(self, path=None):
378
self.path = path
379
if path is None:
113
def __init__(self, transport=None):
114
self.transport = transport
115
if transport is None:
380
116
self.db = sqlite3.connect(":memory:")
381
117
else:
382
if not mapdbs().has_key(path):
383
mapdbs()[path] = sqlite3.connect(path)
384
self.db = mapdbs()[path]
385
self.db.text_factory = str
118
self.db = sqlite3.connect(
119
os.path.join(self.transport.local_abspath("."), "git.db"))
386
120
self.db.executescript("""
387
create table if not exists commits(
388
sha1 text not null check(length(sha1) == 40),
389
revid text not null,
390
tree_sha text not null check(length(tree_sha) == 40)
391
);
121
create table if not exists commits(sha1 text, revid text, tree_sha text);
392
122
create index if not exists commit_sha1 on commits(sha1);
393
123
create unique index if not exists commit_revid on commits(revid);
394
create table if not exists blobs(
395
sha1 text not null check(length(sha1) == 40),
396
fileid text not null,
397
revid text not null
398
);
124
create table if not exists blobs(sha1 text, fileid text, revid text);
399
125
create index if not exists blobs_sha1 on blobs(sha1);
400
126
create unique index if not exists blobs_fileid_revid on blobs(fileid, revid);
401
create table if not exists trees(
402
sha1 text unique not null check(length(sha1) == 40),
403
fileid text not null,
404
revid text not null
405
);
406
create unique index if not exists trees_sha1 on trees(sha1);
407
create unique index if not exists trees_fileid_revid on trees(fileid, revid);
127
create table if not exists trees(sha1 text, path text, revid text);
128
create index if not exists trees_sha1 on trees(sha1);
129
create unique index if not exists trees_path_revid on trees(path, revid);
408
130
""")
409
try:
410
self.db.executescript(
411
"ALTER TABLE commits ADD testament3_sha1 TEXT;")
412
except sqlite3.OperationalError:
413
pass # Column already exists.
414
415
def __repr__(self):
416
return "%s(%r)" % (self.__class__.__name__, self.path)
417
418
def lookup_commit(self, revid):
419
cursor = self.db.execute("select sha1 from commits where revid = ?",
420
(revid,))
421
row = cursor.fetchone()
422
if row is not None:
423
return row[0]
424
raise KeyError
425
426
def commit_write_group(self):
131
132
def _parent_lookup(self, revid):
133
return self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()[0].encode("utf-8")
134
135
def commit(self):
427
136
self.db.commit()
428
137
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)
138
def add_entry(self, sha, type, type_data):
139
"""Add a new entry to the database.
140
"""
141
assert isinstance(type_data, tuple)
142
assert isinstance(sha, str), "type was %r" % sha
143
if type == "commit":
144
self.db.execute("replace into commits (sha1, revid, tree_sha) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
145
elif type == "blob":
146
self.db.execute("replace into blobs (sha1, fileid, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
147
elif type == "tree":
148
self.db.execute("replace into trees (sha1, path, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
149
else:
150
raise AssertionError("Unknown type %s" % type)
151
152
def lookup_tree(self, path, revid):
153
row = self.db.execute("select sha1 from trees where path = ? and revid = ?", (path,revid)).fetchone()
154
if row is None:
155
raise KeyError((path, revid))
156
return row[0]
157
158
def lookup_blob(self, fileid, revid):
159
row = self.db.execute("select sha1 from blobs where fileid = ? and revid = ?", (fileid, revid)).fetchone()
160
if row is None:
161
raise KeyError((fileid, revid))
162
return row[0]
440
163
441
164
def lookup_git_sha(self, sha):
442
165
"""Lookup a Git sha in the database.
443
166
444
167
:param sha: Git object sha
445
168
:return: (type, type_data) with type_data:
446
commit: revid, tree sha, verifiers
447
tree: fileid, revid
448
blob: fileid, revid
169
revision: revid, tree sha
449
170
"""
450
row = self.db.execute("select revid, tree_sha, testament3_sha1 from commits where sha1 = ?", (sha,)).fetchone()
171
row = self.db.execute("select revid, tree_sha from commits where sha1 = ?", (sha,)).fetchone()
451
172
if row is not None:
452
return ("commit", (row[0], row[1], {"testament3-sha1": row[2]}))
173
return ("commit", row)
453
174
row = self.db.execute("select fileid, revid from blobs where sha1 = ?", (sha,)).fetchone()
454
175
if row is not None:
455
176
return ("blob", row)
456
row = self.db.execute("select fileid, revid from trees where sha1 = ?", (sha,)).fetchone()
177
row = self.db.execute("select path, revid from trees where sha1 = ?", (sha,)).fetchone()
457
178
if row is not None:
458
179
return ("tree", row)
459
180
raise KeyError(sha)
460
181
461
182
def revids(self):
462
183
"""List the revision ids known."""
463
return (row for (row,) in self.db.execute("select revid from commits"))
464
465
def sha1s(self):
466
"""List the SHA1s."""
467
for table in ("blobs", "commits", "trees"):
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.")
528
529
530
class TdbGitShaMap(GitShaMap):
531
"""SHA Map that uses a TDB database.
532
533
Entries:
534
535
"git <sha1>" -> "<type> <type-data1> <type-data2>"
536
"commit revid" -> "<sha1> <tree-id>"
537
"tree fileid revid" -> "<sha1>"
538
"blob fileid revid" -> "<sha1>"
539
"""
540
541
TDB_MAP_VERSION = 3
542
TDB_HASH_SIZE = 50000
543
544
def __init__(self, path=None):
545
import tdb
546
self.path = path
547
if path is None:
548
self.db = {}
549
else:
550
if not mapdbs().has_key(path):
551
mapdbs()[path] = tdb.Tdb(path, self.TDB_HASH_SIZE, tdb.DEFAULT,
552
os.O_RDWR|os.O_CREAT)
553
self.db = mapdbs()[path]
554
try:
555
if int(self.db["version"]) not in (2, 3):
556
trace.warning("SHA Map is incompatible (%s -> %d), rebuilding database.",
557
self.db["version"], self.TDB_MAP_VERSION)
558
self.db.clear()
559
except KeyError:
560
pass
561
self.db["version"] = str(self.TDB_MAP_VERSION)
562
563
def start_write_group(self):
564
"""Start writing changes."""
565
self.db.transaction_start()
566
567
def commit_write_group(self):
568
"""Commit any pending changes."""
569
self.db.transaction_commit()
570
571
def abort_write_group(self):
572
"""Abort any pending changes."""
573
self.db.transaction_cancel()
574
575
def __repr__(self):
576
return "%s(%r)" % (self.__class__.__name__, self.path)
577
578
def lookup_commit(self, revid):
579
return sha_to_hex(self.db["commit\0" + revid][:20])
580
581
def lookup_blob_id(self, fileid, revision):
582
return sha_to_hex(self.db["\0".join(("blob", fileid, revision))])
583
584
def lookup_git_sha(self, sha):
585
"""Lookup a Git sha in the database.
586
587
:param sha: Git object sha
588
:return: (type, type_data) with type_data:
589
commit: revid, tree sha
590
blob: fileid, revid
591
tree: fileid, revid
592
"""
593
if len(sha) == 40:
594
sha = hex_to_sha(sha)
595
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:]))
603
604
def missing_revisions(self, revids):
605
ret = set()
606
for revid in revids:
607
if self.db.get("commit\0" + revid) is None:
608
ret.add(revid)
609
return ret
610
611
def revids(self):
612
"""List the revision ids known."""
613
for key in self.db.iterkeys():
614
if key.startswith("commit\0"):
615
yield key[7:]
616
617
def sha1s(self):
618
"""List the SHA1s."""
619
for key in self.db.iterkeys():
620
if key.startswith("git\0"):
621
yield sha_to_hex(key[4:])
622
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
914
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
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)
184
for row in self.db.execute("select revid from commits").fetchall():
185
yield row[0]
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