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 lookup_tree(self, fileid, revid):
59
"""Lookup the SHA of a git tree."""
60
raise NotImplementedError(self.lookup_tree)
62
def lookup_blob(self, fileid, revid):
63
raise NotImplementedError(self.lookup_blob)
65
def lookup_git_sha(self, sha):
66
"""Lookup a Git sha in the database.
68
:param sha: Git object sha
69
:return: (type, type_data) with type_data:
70
revision: revid, tree sha
72
raise NotImplementedError(self.lookup_git_sha)
75
"""List the revision ids known."""
76
raise NotImplementedError(self.revids)
79
"""Commit any pending changes."""
82
class DictGitShaMap(GitShaMap):
87
def add_entry(self, sha, type, type_data):
88
self.dict[sha] = (type, type_data)
90
def lookup_git_sha(self, sha):
93
def lookup_tree(self, fileid, revid):
94
for k, v in self.dict.iteritems():
95
if v == ("tree", (fileid, revid)):
97
raise KeyError((fileid, revid))
99
def lookup_blob(self, fileid, revid):
100
for k, v in self.dict.iteritems():
101
if v == ("blob", (fileid, revid)):
103
raise KeyError((fileid, revid))
106
for key, (type, type_data) in self.dict.iteritems():
111
class SqliteGitShaMap(GitShaMap):
113
def __init__(self, transport=None):
52
114
self.transport = transport
53
self.db = sqlite3.connect(
54
os.path.join(self.transport.local_abspath("."), "git.db"))
115
if transport is None:
116
self.db = sqlite3.connect(":memory:")
118
self.db = sqlite3.connect(
119
os.path.join(self.transport.local_abspath("."), "git.db"))
55
120
self.db.executescript("""
56
121
create table if not exists commits(sha1 text, revid text, tree_sha text);
57
122
create index if not exists commit_sha1 on commits(sha1);
123
create unique index if not exists commit_revid on commits(revid);
58
124
create table if not exists blobs(sha1 text, fileid text, revid text);
59
125
create index if not exists blobs_sha1 on blobs(sha1);
126
create unique index if not exists blobs_fileid_revid on blobs(fileid, revid);
60
127
create table if not exists trees(sha1 text, fileid text, revid text);
61
128
create index if not exists trees_sha1 on trees(sha1);
129
create unique index if not exists trees_fileid_revid on trees(fileid, revid);
64
132
def _parent_lookup(self, revid):
65
133
return self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()[0].encode("utf-8")
67
138
def add_entry(self, sha, type, type_data):
68
139
"""Add a new entry to the database.
71
142
assert isinstance(sha, str), "type was %r" % sha
72
143
if type == "commit":
73
144
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]))
145
elif type in ("blob", "tree"):
146
self.db.execute("replace into %ss (sha1, fileid, revid) values (?, ?, ?)" % type, (sha, type_data[0], type_data[1]))
79
148
raise AssertionError("Unknown type %s" % type)
150
def lookup_tree(self, fileid, revid):
151
row = self.db.execute("select sha1 from trees where fileid = ? and revid = ?", (fileid,revid)).fetchone()
153
raise KeyError((fileid, revid))
156
def lookup_blob(self, fileid, revid):
157
row = self.db.execute("select sha1 from blobs where fileid = ? and revid = ?", (fileid, revid)).fetchone()
159
raise KeyError((fileid, revid))
81
162
def lookup_git_sha(self, sha):
82
163
"""Lookup a Git sha in the database.
85
166
:return: (type, type_data) with type_data:
86
167
revision: revid, tree sha
169
def format(type, row):
170
return (type, (row[0].encode("utf-8"), row[1].encode("utf-8")))
88
171
row = self.db.execute("select revid, tree_sha from commits where sha1 = ?", (sha,)).fetchone()
89
172
if row is not None:
90
return ("commit", row)
173
return format("commit", row)
91
174
row = self.db.execute("select fileid, revid from blobs where sha1 = ?", (sha,)).fetchone()
92
175
if row is not None:
176
return format("blob", row)
94
177
row = self.db.execute("select fileid, revid from trees where sha1 = ?", (sha,)).fetchone()
95
178
if row is not None:
179
return format("tree", row)
97
180
raise KeyError(sha)
183
"""List the revision ids known."""
100
184
for row in self.db.execute("select revid from commits").fetchall():
185
yield row[0].encode("utf-8")