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# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Map from Git sha's to Bazaar objects."""
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from bzrlib.errors import (
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def check_pysqlite_version(sqlite3):
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"""Check that sqlite library is compatible.
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if (sqlite3.sqlite_version_info[0] < 3 or
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(sqlite3.sqlite_version_info[0] == 3 and
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sqlite3.sqlite_version_info[1] < 3)):
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warning('Needs at least sqlite 3.3.x')
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raise bzrlib.errors.BzrError("incompatible sqlite library")
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check_pysqlite_version(sqlite3)
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except (ImportError, bzrlib.errors.BzrError), e:
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from pysqlite2 import dbapi2 as sqlite3
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check_pysqlite_version(sqlite3)
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warning('Needs at least Python2.5 or Python2.4 with the pysqlite2 '
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raise bzrlib.errors.BzrError("missing sqlite library")
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class GitShaMap(object):
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"""Git<->Bzr revision id mapping database."""
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def add_entry(self, sha, type, type_data):
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"""Add a new entry to the database.
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raise NotImplementedError(self.add_entry)
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def lookup_tree(self, path, revid):
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"""Lookup the SHA of a git tree."""
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raise NotImplementedError(self.lookup_tree)
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def lookup_blob(self, fileid, revid):
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raise NotImplementedError(self.lookup_blob)
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def lookup_git_sha(self, sha):
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"""Lookup a Git sha in the database.
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:param sha: Git object sha
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:return: (type, type_data) with type_data:
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revision: revid, tree sha
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raise NotImplementedError(self.lookup_git_sha)
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"""List the revision ids known."""
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raise NotImplementedError(self.revids)
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"""Commit any pending changes."""
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class DictGitShaMap(GitShaMap):
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def add_entry(self, sha, type, type_data):
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self.dict[sha] = (type, type_data)
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def lookup_git_sha(self, sha):
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def lookup_tree(self, path, revid):
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for k, v in self.dict.iteritems():
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if v == ("tree", (path, revid)):
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raise KeyError((path, revid))
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def lookup_blob(self, fileid, revid):
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for k, v in self.dict.iteritems():
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if v == ("blob", (fileid, revid)):
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raise KeyError((fileid, revid))
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for key, (type, type_data) in self.dict.iteritems():
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class SqliteGitShaMap(GitShaMap):
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def __init__(self, transport=None):
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self.transport = transport
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if transport is None:
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self.db = sqlite3.connect(":memory:")
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self.db = sqlite3.connect(
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os.path.join(self.transport.local_abspath("."), "git.db"))
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self.db.executescript("""
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create table if not exists commits(sha1 text, revid text, tree_sha text);
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create index if not exists commit_sha1 on commits(sha1);
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create unique index if not exists commit_revid on commits(revid);
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create table if not exists blobs(sha1 text, fileid text, revid text);
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create index if not exists blobs_sha1 on blobs(sha1);
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create unique index if not exists blobs_fileid_revid on blobs(fileid, revid);
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create table if not exists trees(sha1 text, path text, revid text);
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create index if not exists trees_sha1 on trees(sha1);
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create unique index if not exists trees_path_revid on trees(path, revid);
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def _parent_lookup(self, revid):
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return self.db.execute("select sha1 from commits where revid = ?", (revid,)).fetchone()[0].encode("utf-8")
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def add_entry(self, sha, type, type_data):
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"""Add a new entry to the database.
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assert isinstance(type_data, tuple)
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assert isinstance(sha, str), "type was %r" % sha
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self.db.execute("replace into commits (sha1, revid, tree_sha) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
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self.db.execute("replace into blobs (sha1, fileid, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
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self.db.execute("replace into trees (sha1, path, revid) values (?, ?, ?)", (sha, type_data[0], type_data[1]))
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raise AssertionError("Unknown type %s" % type)
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def lookup_tree(self, path, revid):
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row = self.db.execute("select sha1 from trees where path = ? and revid = ?", (path,revid)).fetchone()
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raise KeyError((path, revid))
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def lookup_blob(self, fileid, revid):
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row = self.db.execute("select sha1 from blobs where fileid = ? and revid = ?", (fileid, revid)).fetchone()
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raise KeyError((fileid, revid))
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def lookup_git_sha(self, sha):
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"""Lookup a Git sha in the database.
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:param sha: Git object sha
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:return: (type, type_data) with type_data:
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revision: revid, tree sha
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row = self.db.execute("select revid, tree_sha from commits where sha1 = ?", (sha,)).fetchone()
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return ("commit", row)
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row = self.db.execute("select fileid, revid from blobs where sha1 = ?", (sha,)).fetchone()
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row = self.db.execute("select path, revid from trees where sha1 = ?", (sha,)).fetchone()
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"""List the revision ids known."""
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for row in self.db.execute("select revid from commits").fetchall():
added
removed
shamap.py
