1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
# Copyright (C) 2009 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Map from Git sha's to Bazaar objects."""
import bzrlib
from bzrlib.errors import NoSuchRevision
import os
def check_pysqlite_version(sqlite3):
"""Check that sqlite library is compatible.
"""
if (sqlite3.sqlite_version_info[0] < 3 or
(sqlite3.sqlite_version_info[0] == 3 and
sqlite3.sqlite_version_info[1] < 3)):
warning('Needs at least sqlite 3.3.x')
raise bzrlib.errors.BzrError("incompatible sqlite library")
try:
try:
import sqlite3
check_pysqlite_version(sqlite3)
except (ImportError, bzrlib.errors.BzrError), e:
from pysqlite2 import dbapi2 as sqlite3
check_pysqlite_version(sqlite3)
except:
warning('Needs at least Python2.5 or Python2.4 with the pysqlite2 '
'module')
raise bzrlib.errors.BzrError("missing sqlite library")
class GitShaMap(object):
def __init__(self, transport):
self.transport = transport
self.db = sqlite3.connect(
os.path.join(self.transport.local_abspath("."), "git.db"))
self.db.executescript("""
create table if not exists commits(sha1 text, revid text, tree_sha text);
create index if not exists commit_sha1 on commits(sha1);
create table if not exists blobs(sha1 text, fileid text, revid text);
create index if not exists blobs_sha1 on blobs(sha1);
create table if not exists trees(sha1 text, path text, revid text);
create index if not exists trees_sha1 on trees(sha1);
""")
def _parent_lookup(self, revid):
return self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()[0].encode("utf-8")
def commit(self):
self.db.commit()
def add_entry(self, sha, type, type_data):
"""Add a new entry to the database.
"""
assert isinstance(type_data, tuple)
assert isinstance(sha, str), "type was %r" % sha
if type == "commit":
self.db.execute("replace into commits (sha1, revid, tree_sha) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
elif type == "blob":
self.db.execute("replace into blobs (sha1, fileid, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
elif type == "tree":
self.db.execute("replace into trees (sha1, path, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
else:
raise AssertionError("Unknown type %s" % type)
def lookup_git_sha(self, sha):
"""Lookup a Git sha in the database.
:param sha: Git object sha
:return: (type, type_data) with type_data:
revision: revid, tree sha
"""
row = self.db.execute("select revid, tree_sha from commits where sha1 = ?", (sha,)).fetchone()
if row is not None:
return ("commit", row)
row = self.db.execute("select fileid, revid from blobs where sha1 = ?", (sha,)).fetchone()
if row is not None:
return ("blob", row)
row = self.db.execute("select path, revid from trees where sha1 = ?", (sha,)).fetchone()
if row is not None:
return ("tree", row)
raise KeyError(sha)
def revids(self):
for row in self.db.execute("select revid from commits").fetchall():
yield row[0]
|