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# Copyright (C) 2005, 2006 Canonical Ltd
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# Copyright (C) 2005-2010 Canonical Ltd
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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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# 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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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""XML externalization support."""
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# importing this module is fairly slow because it has to load several
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from bzrlib import registry
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from bzrlib.serializer import Serializer
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from bzrlib.trace import mutter, warning
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from bzrlib import errors
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class Serializer(object):
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"""Abstract object serialize/deserialize"""
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def write_inventory(self, inv, f):
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"""Write inventory to a file"""
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raise NotImplementedError(self.write_inventory)
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def write_inventory_to_string(self, inv):
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raise NotImplementedError(self.write_inventory_to_string)
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def read_inventory_from_string(self, xml_string, revision_id=None):
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class XMLSerializer(Serializer):
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"""Abstract XML object serialize/deserialize"""
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squashes_xml_invalid_characters = True
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def read_inventory_from_string(self, xml_string, revision_id=None,
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entry_cache=None, return_from_cache=False):
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"""Read xml_string into an inventory object.
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:param xml_string: The xml to read.
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serialised without a revision identifier can be given the right
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revision id (but not for working tree inventories where users can
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edit the data without triggering checksum errors or anything).
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:param entry_cache: An optional cache of InventoryEntry objects. If
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supplied we will look up entries via (file_id, revision_id) which
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should map to a valid InventoryEntry (File/Directory/etc) object.
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:param return_from_cache: Return entries directly from the cache,
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rather than copying them first. This is only safe if the caller
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promises not to mutate the returned inventory entries, but it can
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make some operations significantly faster.
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return self._unpack_inventory(fromstring(xml_string), revision_id)
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return self._unpack_inventory(fromstring(xml_string), revision_id,
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entry_cache=entry_cache,
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return_from_cache=return_from_cache)
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except ParseError, e:
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raise errors.UnexpectedInventoryFormat(e)
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def _escape_replace(match, map=escape_map):
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return map[match.group()]
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def _escape_attrib(text, encoding=None, replace=None):
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# escape attribute value
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def _escape_cdata_replace(match, map=escape_cdata_map):
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return map[match.group()]
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def _escape_cdata(text, encoding=None, replace=None):
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# escape character data
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elementtree.ElementTree._escape_cdata = _escape_cdata
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class SerializerRegistry(registry.Registry):
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"""Registry for serializer objects"""
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format_registry = SerializerRegistry()
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format_registry.register_lazy('4', 'bzrlib.xml4', 'serializer_v4')
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format_registry.register_lazy('5', 'bzrlib.xml5', 'serializer_v5')
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format_registry.register_lazy('6', 'bzrlib.xml6', 'serializer_v6')
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format_registry.register_lazy('7', 'bzrlib.xml7', 'serializer_v7')
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format_registry.register_lazy('8', 'bzrlib.xml8', 'serializer_v8')
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def escape_invalid_chars(message):
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"""Escape the XML-invalid characters in a commit message.
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:param message: Commit message to escape
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:return: tuple with escaped message and number of characters escaped
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# Python strings can include characters that can't be
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# represented in well-formed XML; escape characters that
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# aren't listed in the XML specification
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# (http://www.w3.org/TR/REC-xml/#NT-Char).
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return re.subn(u'[^\x09\x0A\x0D\u0020-\uD7FF\uE000-\uFFFD]+',
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lambda match: match.group(0).encode('unicode_escape'),