46
48
raise bzrlib.errors.BzrError("missing sqlite library")
51
_mapdbs = threading.local()
53
"""Get a cache for this thread's db connections."""
56
except AttributeError:
49
61
class GitShaMap(object):
51
def __init__(self, transport):
52
self.transport = transport
53
self.db = sqlite3.connect(
54
os.path.join(self.transport.local_abspath("."), "git.db"))
62
"""Git<->Bzr revision id mapping database."""
64
def add_entry(self, sha, type, type_data):
65
"""Add a new entry to the database.
67
raise NotImplementedError(self.add_entry)
69
def add_entries(self, entries):
70
"""Add multiple new entries to the database.
75
def lookup_tree(self, fileid, revid):
76
"""Lookup the SHA of a git tree."""
77
raise NotImplementedError(self.lookup_tree)
79
def lookup_blob(self, fileid, revid):
80
raise NotImplementedError(self.lookup_blob)
82
def lookup_git_sha(self, sha):
83
"""Lookup a Git sha in the database.
85
:param sha: Git object sha
86
:return: (type, type_data) with type_data:
87
revision: revid, tree sha
89
raise NotImplementedError(self.lookup_git_sha)
92
"""List the revision ids known."""
93
raise NotImplementedError(self.revids)
96
"""Commit any pending changes."""
99
class DictGitShaMap(GitShaMap):
104
def add_entry(self, sha, type, type_data):
105
self.dict[sha] = (type, type_data)
107
def lookup_git_sha(self, sha):
108
return self.dict[sha]
110
def lookup_tree(self, fileid, revid):
111
for k, v in self.dict.iteritems():
112
if v == ("tree", (fileid, revid)):
114
raise KeyError((fileid, revid))
116
def lookup_blob(self, fileid, revid):
117
for k, v in self.dict.iteritems():
118
if v == ("blob", (fileid, revid)):
120
raise KeyError((fileid, revid))
123
for key, (type, type_data) in self.dict.iteritems():
128
class SqliteGitShaMap(GitShaMap):
130
def __init__(self, path=None):
133
self.db = sqlite3.connect(":memory:")
135
if not mapdbs().has_key(path):
136
mapdbs()[path] = sqlite3.connect(path)
137
self.db = mapdbs()[path]
55
138
self.db.executescript("""
56
139
create table if not exists commits(sha1 text, revid text, tree_sha text);
57
140
create index if not exists commit_sha1 on commits(sha1);
141
create unique index if not exists commit_revid on commits(revid);
58
142
create table if not exists blobs(sha1 text, fileid text, revid text);
59
143
create index if not exists blobs_sha1 on blobs(sha1);
144
create unique index if not exists blobs_fileid_revid on blobs(fileid, revid);
60
145
create table if not exists trees(sha1 text, fileid text, revid text);
61
146
create index if not exists trees_sha1 on trees(sha1);
147
create unique index if not exists trees_fileid_revid on trees(fileid, revid);
151
def from_repository(cls, repository):
152
return cls(os.path.join(repository._transport.local_abspath("."), "git.db"))
64
154
def _parent_lookup(self, revid):
65
return self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()[0].encode("utf-8")
155
row = self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()
157
return row[0].encode("utf-8")
163
def add_entries(self, entries):
166
for sha, type, type_data in entries:
167
assert isinstance(type_data[0], str)
168
assert isinstance(type_data[1], str)
169
entry = (sha.decode("utf-8"), type_data[0].decode("utf-8"),
170
type_data[1].decode("utf-8"))
178
self.db.executemany("replace into trees (sha1, fileid, revid) values (?, ?, ?)", trees)
180
self.db.executemany("replace into blobs (sha1, fileid, revid) values (?, ?, ?)", blobs)
67
183
def add_entry(self, sha, type, type_data):
68
184
"""Add a new entry to the database.
71
187
assert isinstance(sha, str), "type was %r" % sha
72
188
if type == "commit":
73
189
self.db.execute("replace into commits (sha1, revid, tree_sha) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
75
self.db.execute("replace into blobs (sha1, fileid, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
77
self.db.execute("replace into trees (sha1, fileid, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
190
elif type in ("blob", "tree"):
191
self.db.execute("replace into %ss (sha1, fileid, revid) values (?, ?, ?)" % type, (sha, type_data[0], type_data[1]))
79
193
raise AssertionError("Unknown type %s" % type)
195
def lookup_tree(self, fileid, revid):
196
row = self.db.execute("select sha1 from trees where fileid = ? and revid = ?", (fileid,revid)).fetchone()
198
raise KeyError((fileid, revid))
199
return row[0].encode("utf-8")
201
def lookup_blob(self, fileid, revid):
202
row = self.db.execute("select sha1 from blobs where fileid = ? and revid = ?", (fileid, revid)).fetchone()
204
raise KeyError((fileid, revid))
205
return row[0].encode("utf-8")
81
207
def lookup_git_sha(self, sha):
82
208
"""Lookup a Git sha in the database.
85
211
:return: (type, type_data) with type_data:
86
212
revision: revid, tree sha
214
def format(type, row):
215
return (type, (row[0].encode("utf-8"), row[1].encode("utf-8")))
88
216
row = self.db.execute("select revid, tree_sha from commits where sha1 = ?", (sha,)).fetchone()
89
217
if row is not None:
90
return ("commit", row)
218
return format("commit", row)
91
219
row = self.db.execute("select fileid, revid from blobs where sha1 = ?", (sha,)).fetchone()
92
220
if row is not None:
221
return format("blob", row)
94
222
row = self.db.execute("select fileid, revid from trees where sha1 = ?", (sha,)).fetchone()
95
223
if row is not None:
224
return format("tree", row)
97
225
raise KeyError(sha)
228
"""List the revision ids known."""
100
229
for row in self.db.execute("select revid from commits").fetchall():
230
yield row[0].encode("utf-8")