49
50
class GitShaMap(object):
51
def __init__(self, transport):
51
"""Git<->Bzr revision id mapping database."""
53
def add_entry(self, sha, type, type_data):
54
"""Add a new entry to the database.
56
raise NotImplementedError(self.add_entry)
58
def add_entries(self, entries):
59
"""Add multiple new entries to the database.
64
def lookup_tree(self, fileid, revid):
65
"""Lookup the SHA of a git tree."""
66
raise NotImplementedError(self.lookup_tree)
68
def lookup_blob(self, fileid, revid):
69
raise NotImplementedError(self.lookup_blob)
71
def lookup_git_sha(self, sha):
72
"""Lookup a Git sha in the database.
74
:param sha: Git object sha
75
:return: (type, type_data) with type_data:
76
revision: revid, tree sha
78
raise NotImplementedError(self.lookup_git_sha)
81
"""List the revision ids known."""
82
raise NotImplementedError(self.revids)
85
"""Commit any pending changes."""
88
class DictGitShaMap(GitShaMap):
93
def add_entry(self, sha, type, type_data):
94
self.dict[sha] = (type, type_data)
96
def lookup_git_sha(self, sha):
99
def lookup_tree(self, fileid, revid):
100
for k, v in self.dict.iteritems():
101
if v == ("tree", (fileid, revid)):
103
raise KeyError((fileid, revid))
105
def lookup_blob(self, fileid, revid):
106
for k, v in self.dict.iteritems():
107
if v == ("blob", (fileid, revid)):
109
raise KeyError((fileid, revid))
112
for key, (type, type_data) in self.dict.iteritems():
117
class SqliteGitShaMap(GitShaMap):
119
def __init__(self, transport=None):
52
120
self.transport = transport
53
self.db = sqlite3.connect(
54
os.path.join(self.transport.local_abspath("."), "git.db"))
121
if transport is None:
122
self.db = sqlite3.connect(":memory:")
124
self.db = sqlite3.connect(
125
os.path.join(self.transport.local_abspath("."), "git.db"))
55
126
self.db.executescript("""
56
127
create table if not exists commits(sha1 text, revid text, tree_sha text);
57
128
create index if not exists commit_sha1 on commits(sha1);
129
create unique index if not exists commit_revid on commits(revid);
58
130
create table if not exists blobs(sha1 text, fileid text, revid text);
59
131
create index if not exists blobs_sha1 on blobs(sha1);
132
create unique index if not exists blobs_fileid_revid on blobs(fileid, revid);
60
133
create table if not exists trees(sha1 text, fileid text, revid text);
61
134
create index if not exists trees_sha1 on trees(sha1);
135
create unique index if not exists trees_fileid_revid on trees(fileid, revid);
64
138
def _parent_lookup(self, revid):
65
139
return self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()[0].encode("utf-8")
67
144
def add_entry(self, sha, type, type_data):
68
145
"""Add a new entry to the database.
71
148
assert isinstance(sha, str), "type was %r" % sha
72
149
if type == "commit":
73
150
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]))
151
elif type in ("blob", "tree"):
152
self.db.execute("replace into %ss (sha1, fileid, revid) values (?, ?, ?)" % type, (sha, type_data[0], type_data[1]))
79
154
raise AssertionError("Unknown type %s" % type)
156
def lookup_tree(self, fileid, revid):
157
row = self.db.execute("select sha1 from trees where fileid = ? and revid = ?", (fileid,revid)).fetchone()
159
raise KeyError((fileid, revid))
160
return row[0].encode("utf-8")
162
def lookup_blob(self, fileid, revid):
163
row = self.db.execute("select sha1 from blobs where fileid = ? and revid = ?", (fileid, revid)).fetchone()
165
raise KeyError((fileid, revid))
166
return row[0].encode("utf-8")
81
168
def lookup_git_sha(self, sha):
82
169
"""Lookup a Git sha in the database.
85
172
:return: (type, type_data) with type_data:
86
173
revision: revid, tree sha
175
def format(type, row):
176
return (type, (row[0].encode("utf-8"), row[1].encode("utf-8")))
88
177
row = self.db.execute("select revid, tree_sha from commits where sha1 = ?", (sha,)).fetchone()
89
178
if row is not None:
90
return ("commit", row)
179
return format("commit", row)
91
180
row = self.db.execute("select fileid, revid from blobs where sha1 = ?", (sha,)).fetchone()
92
181
if row is not None:
182
return format("blob", row)
94
183
row = self.db.execute("select fileid, revid from trees where sha1 = ?", (sha,)).fetchone()
95
184
if row is not None:
185
return format("tree", row)
97
186
raise KeyError(sha)
189
"""List the revision ids known."""
100
190
for row in self.db.execute("select revid from commits").fetchall():
191
yield row[0].encode("utf-8")