diff -r 4ce9e536dd66 -r 4751d77394b1 misc/migration/3.11.0_Any.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/migration/3.11.0_Any.py	Fri Mar 11 09:47:09 2011 +0100
@@ -0,0 +1,85 @@
+from datetime import datetime
+
+for rtype in ('cw_support', 'cw_dont_cross', 'cw_may_cross'):
+    drop_relation_type(rtype)
+
+add_entity_type('CWSourceSchemaConfig')
+
+if not 'url' in schema['CWSource'].subjrels:
+    add_attribute('CWSource', 'url')
+    add_attribute('CWSource', 'parser')
+    add_attribute('CWSource', 'latest_retrieval')
+
+try:
+    from cubicweb.server.sources.pyrorql import PyroRQLSource
+except ImportError:
+    pass
+else:
+
+    from os.path import join
+    # function to read old python mapping file
+    def load_mapping_file(source):
+        mappingfile = source.config['mapping-file']
+        mappingfile = join(source.repo.config.apphome, mappingfile)
+        mapping = {}
+        execfile(mappingfile, mapping)
+        for junk in ('__builtins__', '__doc__'):
+            mapping.pop(junk, None)
+        mapping.setdefault('support_relations', {})
+        mapping.setdefault('dont_cross_relations', set())
+        mapping.setdefault('cross_relations', set())
+        # do some basic checks of the mapping content
+        assert 'support_entities' in mapping, \
+               'mapping file should at least define support_entities'
+        assert isinstance(mapping['support_entities'], dict)
+        assert isinstance(mapping['support_relations'], dict)
+        assert isinstance(mapping['dont_cross_relations'], set)
+        assert isinstance(mapping['cross_relations'], set)
+        unknown = set(mapping) - set( ('support_entities', 'support_relations',
+                                       'dont_cross_relations', 'cross_relations') )
+        assert not unknown, 'unknown mapping attribute(s): %s' % unknown
+        # relations that are necessarily not crossed
+        for rtype in ('is', 'is_instance_of', 'cw_source'):
+            assert rtype not in mapping['dont_cross_relations'], \
+                   '%s relation should not be in dont_cross_relations' % rtype
+            assert rtype not in mapping['support_relations'], \
+                   '%s relation should not be in support_relations' % rtype
+        return mapping
+    # for now, only pyrorql sources have a mapping
+    for source in repo.sources_by_uri.values():
+        if not isinstance(source, PyroRQLSource):
+            continue
+        sourceentity = session.entity_from_eid(source.eid)
+        mapping = load_mapping_file(source)
+        # write mapping as entities
+        print 'migrating map for', source
+        for etype, write in mapping['support_entities'].items():
+            create_entity('CWSourceSchemaConfig',
+                          cw_for_source=sourceentity,
+                          cw_schema=session.entity_from_eid(schema[etype].eid),
+                          options=write and u'write' or None,
+                          ask_confirm=False)
+        for rtype, write in mapping['support_relations'].items():
+            options = []
+            if write:
+                options.append(u'write')
+            if rtype in mapping['cross_relations']:
+                options.append(u'maycross')
+            create_entity('CWSourceSchemaConfig',
+                          cw_for_source=sourceentity,
+                          cw_schema=session.entity_from_eid(schema[rtype].eid),
+                          options=u':'.join(options) or None,
+                          ask_confirm=False)
+        for rtype in mapping['dont_cross_relations']:
+            create_entity('CWSourceSchemaConfig',
+                          cw_for_source=source,
+                          cw_schema=session.entity_from_eid(schema[rtype].eid),
+                          options=u'dontcross',
+                          ask_confirm=False)
+        # latest update time cwproperty is now a source attribute (latest_retrieval)
+        pkey = u'sources.%s.latest-update-time' % source.uri
+        rset = session.execute('Any V WHERE X is CWProperty, X value V, X pkey %(k)s',
+                               {'k': pkey})
+        timestamp = int(rset[0][0])
+        sourceentity.set_attributes(latest_retrieval=datetime.fromtimestamp(timestamp))
+        session.execute('DELETE CWProperty X WHERE X pkey %(k)s', {'k': pkey})