diff -r 058bb3dc685f -r 0b59724cb3f2 cubicweb/misc/cmp_schema.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/misc/cmp_schema.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,24 @@
+"""This module compare the Schema on the file system to the one in the database"""
+
+from cStringIO import StringIO
+from cubicweb.web.schemaviewer import SchemaViewer
+from logilab.common.ureports import TextWriter
+import difflib
+
+viewer = SchemaViewer()
+layout_db = viewer.visit_schema(schema, display_relations=True)
+layout_fs = viewer.visit_schema(fsschema, display_relations=True)
+writer = TextWriter()
+stream_db = StringIO()
+stream_fs = StringIO()
+writer.format(layout_db, stream=stream_db)
+writer.format(layout_fs, stream=stream_fs)
+
+stream_db.seek(0)
+stream_fs.seek(0)
+db = stream_db.getvalue().splitlines()
+fs = stream_fs.getvalue().splitlines()
+open('db_schema.txt', 'w').write(stream_db.getvalue())
+open('fs_schema.txt', 'w').write(stream_fs.getvalue())
+#for diff in difflib.ndiff(fs, db):
+#    print diff