49
49
class GitShaMap(object):
51
def __init__(self, transport):
50
"""Git<->Bzr revision id mapping database."""
52
def add_entry(self, sha, type, type_data):
53
"""Add a new entry to the database.
55
raise NotImplementedError(self.add_entry)
57
def lookup_tree(self, path, revid):
58
"""Lookup the SHA of a git tree."""
59
raise NotImplementedError(self.lookup_tree)
61
def lookup_git_sha(self, sha):
62
"""Lookup a Git sha in the database.
64
:param sha: Git object sha
65
:return: (type, type_data) with type_data:
66
revision: revid, tree sha
68
raise NotImplementedError(self.lookup_git_sha)
71
"""List the revision ids known."""
72
raise NotImplementedError(self.revids)
75
"""Commit any pending changes."""
78
class DictGitShaMap(GitShaMap):
83
def add_entry(self, sha, type, type_data):
84
self.dict[sha] = (type, type_data)
86
def lookup_git_sha(self, sha):
89
def lookup_tree(self, path, revid):
90
for k, v in self.dict.iteritems():
91
if v == ("tree", (path, revid)):
93
raise KeyError((path, revid))
96
for key, (type, type_data) in self.dict.iteritems():
101
class SqliteGitShaMap(GitShaMap):
103
def __init__(self, transport=None):
52
104
self.transport = transport
53
self.db = sqlite3.connect(
54
os.path.join(self.transport.local_abspath("."), "git.db"))
105
if transport is None:
106
self.db = sqlite3.connect(":memory:")
108
self.db = sqlite3.connect(
109
os.path.join(self.transport.local_abspath("."), "git.db"))
55
110
self.db.executescript("""
56
111
create table if not exists commits(sha1 text, revid text, tree_sha text);
57
112
create index if not exists commit_sha1 on commits(sha1);
113
create unique index if not exists commit_revid on commits(revid);
58
114
create table if not exists blobs(sha1 text, fileid text, revid text);
59
115
create index if not exists blobs_sha1 on blobs(sha1);
60
create table if not exists trees(sha1 text, fileid text, revid text);
116
create unique index if not exists blobs_fileid_revid on blobs(fileid, revid);
117
create table if not exists trees(sha1 text, path text, revid text);
61
118
create index if not exists trees_sha1 on trees(sha1);
119
create unique index if not exists trees_path_revid on trees(path, revid);
64
122
def _parent_lookup(self, revid):
65
123
return self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()[0].encode("utf-8")
67
128
def add_entry(self, sha, type, type_data):
68
129
"""Add a new entry to the database.
74
135
elif type == "blob":
75
136
self.db.execute("replace into blobs (sha1, fileid, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
76
137
elif type == "tree":
77
self.db.execute("replace into trees (sha1, fileid, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
138
self.db.execute("replace into trees (sha1, path, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
79
140
raise AssertionError("Unknown type %s" % type)
142
def lookup_tree(self, path, revid):
143
row = self.db.execute("select sha1 from trees where path = ? and revid = ?", (path,revid)).fetchone()
145
raise KeyError((path, revid))
81
148
def lookup_git_sha(self, sha):
82
149
"""Lookup a Git sha in the database.