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# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>
# 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
"""TDB implementation of the bzr-svn cache."""
import os
import tdb
try:
tdb.Tdb.get
except AttributeError:
raise ImportError("tdb is out of date: doesn't have a Tdb.get attribute")
from bzrlib import (
bencode,
debug,
errors,
trace,
)
from bzrlib.plugins.svn.cache import (
RepositoryCache,
)
from bzrlib.plugins.svn.mapping import (
mapping_registry,
)
from bzrlib.plugins.svn.revids import (
RevisionIdMapCache,
)
from bzrlib.plugins.svn.revmeta import (
RevisionInfoCache,
)
from bzrlib.plugins.svn.logwalker import (
LogCache,
)
from bzrlib.plugins.svn.parents import (
ParentsCache,
)
from subvertpy import NODE_UNKNOWN
from tdb import Tdb as tdb_open
CACHE_DB_VERSION = 1
class CacheTable(object):
def __init__(self, db):
self.db = db
def commit(self):
pass
def mutter(self, text, *args, **kwargs):
if "cache" in debug.debug_flags:
trace.mutter(text, *args, **kwargs)
class TdbRevisionIdMapCache(RevisionIdMapCache, CacheTable):
def set_last_revnum_checked(self, layout, revnum):
"""See RevisionIdMapCache.set_last_revnum_checked."""
self.db["revidmap-last/%s" % str(layout)] = str(revnum)
def last_revnum_checked(self, layout):
"""See RevisionIdMapCache.last_revnum_checked."""
try:
return int(self.db["revidmap-last/%s" % str(layout)])
except KeyError:
return 0
def lookup_revid(self, revid):
"""See RevisionIdMapCache.lookup_revid."""
self.mutter('lookup-revid %s', revid)
try:
(min_revnum, max_revnum, mapping_name, path) = self.db["native-revid/" + revid].split(" ", 3)
except KeyError:
raise errors.NoSuchRevision(self, revid)
return (path, int(min_revnum), int(max_revnum), mapping_name)
def lookup_branch_revnum(self, revnum, path, mapping):
"""See RevisionIdMapCache.lookup_branch_revnum."""
self.mutter('lookup-branch-revnum %s:%d', path, revnum)
try:
return self.db["foreign-revid/%d %s %s" % (revnum, getattr(mapping, "name", mapping), path)]
except KeyError:
return None
def insert_revid(self, revid, branch, min_revnum, max_revnum, mapping):
"""See RevisionIdMapCache.insert_revid."""
mappingname = getattr(mapping, "name", mapping)
self.db["native-revid/" + revid] = "%d %d %s %s" % (min_revnum, max_revnum, mappingname, branch)
if min_revnum == max_revnum:
self.db["foreign-revid/%d %s %s" % (min_revnum, mappingname, branch)] = revid
class TdbRevisionInfoCache(RevisionInfoCache, CacheTable):
def set_original_mapping(self, foreign_revid, original_mapping):
"""See RevisionInfoCache.set_original_mapping."""
if original_mapping is not None:
orig_mapping_name = original_mapping.name
else:
orig_mapping_name = ""
self.db["original-mapping/%d %s" % (foreign_revid[2], foreign_revid[1])] = orig_mapping_name
def insert_revision(self, foreign_revid, mapping, (revno, revid, hidden),
stored_lhs_parent_revid):
"""See RevisionInfoCache.insert_revision."""
if revid is None:
revid = mapping.revision_id_foreign_to_bzr(foreign_revid)
self.db["foreign-revid/%d %d %s %s" % (foreign_revid[2], foreign_revid[2], mapping.name, foreign_revid[1])] = revid
basekey = "%d %s %s" % (foreign_revid[2], mapping.name, foreign_revid[1])
assert not hidden or revno is None
if revno is not None:
self.db["revno/%s" % basekey] = "%d" % revno
elif hidden:
self.db["revno/%s" % basekey] = ""
if stored_lhs_parent_revid is not None:
self.db["lhs-parent-revid/%s" % basekey] = stored_lhs_parent_revid
def get_revision(self, foreign_revid, mapping):
"""See RevisionInfoCache.get_revision."""
self.mutter("get-revision %r,%r", foreign_revid, mapping)
basekey = "%d %s %s" % (foreign_revid[2], mapping.name, foreign_revid[1])
revid = self.db["foreign-revid/%d %d %s %s" % (foreign_revid[2], foreign_revid[2], mapping.name, foreign_revid[1])]
stored_lhs_parent_revid = self.db.get("lhs-parent-revid/%s" % basekey)
try:
revno = int(self.db["revno/%s" % basekey])
hidden = False
except KeyError:
revno = None
hidden = False
except ValueError: # empty string
hidden = True
revno = None
return ((revno, revid, hidden), stored_lhs_parent_revid)
def get_original_mapping(self, foreign_revid):
"""See RevisionInfoCache.get_original_mapping."""
self.mutter("get-original-mapping %r", foreign_revid)
ret = self.db["original-mapping/%d %s" % (foreign_revid[2], foreign_revid[1])]
if ret == "":
return None
return mapping_registry.parse_mapping_name("svn-" + ret)
class TdbLogCache(LogCache, CacheTable):
def find_latest_change(self, path, revnum):
"""See LogCache.find_latest_change."""
raise NotImplementedError(self.find_latest_change)
def get_revision_paths(self, revnum):
"""See LogCache.get_revision_paths."""
self.mutter("get-revision-paths %d", revnum)
ret = {}
try:
db = bencode.bdecode(self.db["paths/%d" % revnum])
except KeyError:
raise KeyError("missing revision paths for %d" % revnum)
for key, v in db.iteritems():
try:
(action, cp, cr, kind) = v
except ValueError:
(action, cp, cr) = v
kind = NODE_UNKNOWN
if cp == "" and cr == -1:
cp = None
ret[key] = (action, cp, cr, kind)
return ret
def insert_paths(self, rev, orig_paths, revprops, all_revprops):
"""See LogCache.insert_paths."""
self.db.transaction_start()
try:
self.insert_revprops(rev, revprops, all_revprops)
if orig_paths is None:
orig_paths = {}
new_paths = {}
for p in orig_paths:
v = orig_paths[p]
copyfrom_path = v[1]
if copyfrom_path is not None:
copyfrom_path = copyfrom_path.strip("/")
else:
copyfrom_path = ""
assert orig_paths[p][2] == -1
try:
kind = v[3]
except IndexError:
kind = NODE_UNKNOWN
new_paths[p.strip("/")] = (v[0], copyfrom_path, v[2], kind)
self.db["paths/%d" % rev] = bencode.bencode(new_paths)
min_revnum = self.min_revnum()
if min_revnum is None:
min_revnum = rev
else:
min_revnum = min(min_revnum, rev)
self.db["log-min"] = str(min_revnum)
self.db["log-last"] = str(max(self.max_revnum(), rev))
except:
self.db.transaction_cancel()
raise
else:
self.db.transaction_commit()
def drop_revprops(self, revnum):
"""See LogCache.drop_revprops."""
self.db["revprops/%d" % revnum] = bencode.bencode({})
def get_revprops(self, revnum):
"""See LogCache.get_revprops."""
self.mutter("get-revision-properties %d", revnum)
ret = bencode.bdecode(self.db["revprops/%d" % revnum])
return (ret[0], bool(ret[1]))
def insert_revprops(self, revision, revprops, all_revprops):
"""See LogCache.insert_revprops."""
if revprops is None:
revprops = {}
self.db["revprops/%d" % revision] = bencode.bencode((revprops, all_revprops))
def max_revnum(self):
"""See LogCache.last_revnum."""
try:
return int(self.db["log-last"])
except KeyError:
return 0
def min_revnum(self):
"""See LogCache.min_revnum."""
try:
return int(self.db["log-min"])
except KeyError:
return None
class TdbParentsCache(ParentsCache, CacheTable):
def insert_parents(self, revid, parents):
"""See ParentsCache.insert_parents."""
self.db["parents/%s" % revid] = " ".join(parents)
def lookup_parents(self, revid):
"""See ParentsCache.lookup_parents."""
self.mutter("lookup-parents %s", revid)
try:
return tuple(
[p for p in self.db["parents/%s" % revid].split(" ")
if p != ""])
except KeyError:
return None
TDB_HASH_SIZE = 10000
class TdbRepositoryCache(RepositoryCache):
"""Object that provides a cache related to a particular UUID."""
def __init__(self, uuid):
super(TdbRepositoryCache, self).__init__(uuid)
cache_file = os.path.join(self.create_cache_dir(), 'cache.tdb')
assert isinstance(cache_file, str)
db = tdb_open(cache_file, TDB_HASH_SIZE, tdb.DEFAULT,
os.O_RDWR|os.O_CREAT)
try:
assert int(db["version"]) == CACHE_DB_VERSION
except KeyError:
db["version"] = str(CACHE_DB_VERSION)
self._db = db
def open_revid_map(self):
return TdbRevisionIdMapCache(self._db)
def open_logwalker(self):
return TdbLogCache(self._db)
def open_revision_cache(self):
return TdbRevisionInfoCache(self._db)
def open_parents(self):
return TdbParentsCache(self._db)
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