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# Copyright (C) 2008 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Serializer object for CHK based inventory storage."""
from cStringIO import (
StringIO,
)
from bzrlib import (
cache_utf8,
inventory,
osutils,
revision as _mod_revision,
rio,
xml5,
xml6,
)
class RIORevisionSerializer1(object):
"""Simple line-based revision serializer.
This writes simple key/value pairs for all elements on the revision,
each on a separate line and using colons to separate key and value. Newlines
are backslash-escaped where necessary.
The commit message is always serialized last and can span multiple lines.
"""
def write_revision(self, rev, f):
decode_utf8 = cache_utf8.decode
w = rio.RioWriter(f)
s = rio.Stanza()
revision_id = rev.revision_id
if isinstance(revision_id, str):
revision_id = decode_utf8(revision_id)
s.add("revision-id", revision_id)
s.add("timestamp", "%.3f" % rev.timestamp)
if rev.parent_ids:
s.add("parent-ids",
" ".join([decode_utf8(p) for p in rev.parent_ids]))
s.add("inventory-sha1", rev.inventory_sha1)
s.add("committer", rev.committer)
if rev.timezone is not None:
s.add("timezone", str(rev.timezone))
if rev.properties:
revprops_stanza = rio.Stanza()
for k, v in rev.properties.iteritems():
if isinstance(v, str):
v = decode_utf8(v)
revprops_stanza.add(decode_utf8(k), v)
s.add("properties", revprops_stanza.to_unicode())
s.add("message", rev.message)
w.write_stanza(s)
def write_revision_to_string(self, rev):
f = StringIO()
self.write_revision(rev, f)
return f.getvalue()
def read_revision(self, f):
s = rio.read_stanza(f)
rev = _mod_revision.Revision(None)
for (field, value) in s.iter_pairs():
if field == "revision-id":
rev.revision_id = cache_utf8.encode(value)
elif field == "parent-ids":
rev.parent_ids = [cache_utf8.encode(p) for p in value.split(" ")]
elif field == "committer":
rev.committer = value
elif field == "inventory-sha1":
rev.inventory_sha1 = value
elif field == "timezone":
rev.timezone = int(value)
elif field == "timestamp":
rev.timestamp = float(value)
elif field == "message":
rev.message = value
elif field == "properties":
rev.properties = rio.read_stanza_unicode(
osutils.split_lines(value)).as_dict()
else:
raise AssertionError("Unknown field %s" % field)
l = f.readline()
return rev
def read_revision_from_string(self, xml_string):
f = StringIO(xml_string)
rev = self.read_revision(f)
return rev
class CHKSerializerSubtree(RIORevisionSerializer1,xml6.Serializer_v6):
"""A CHKInventory based serializer that supports tree references"""
supported_kinds = set(['file', 'directory', 'symlink', 'tree-reference'])
format_num = '9'
revision_format_num = None
support_altered_by_hack = False
def _unpack_entry(self, elt):
kind = elt.tag
if not kind in self.supported_kinds:
raise AssertionError('unsupported entry kind %s' % kind)
if kind == 'tree-reference':
file_id = elt.attrib['file_id']
name = elt.attrib['name']
parent_id = elt.attrib['parent_id']
revision = elt.get('revision')
reference_revision = elt.get('reference_revision')
return inventory.TreeReference(file_id, name, parent_id, revision,
reference_revision)
else:
return xml6.Serializer_v6._unpack_entry(self, elt)
def __init__(self, node_size, search_key_name):
self.maximum_size = node_size
self.search_key_name = search_key_name
class CHKSerializer(RIORevisionSerializer1,xml5.Serializer_v5):
"""A CHKInventory based serializer with 'plain' behaviour."""
format_num = '9'
revision_format_num = None
support_altered_by_hack = False
def __init__(self, node_size, search_key_name):
self.maximum_size = node_size
self.search_key_name = search_key_name
chk_serializer_255_bigpage = CHKSerializer(65536, 'hash-255-way')
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