[repository] #1460066: backport datafeed cube as cubicweb source * add some attributes to CWSource to handle this kind of source (not natural to put everything in 'config' string). Adding a CWSource subclass has been attempted then rollbacked because it adds pain to handle multi-sources planning and it introduce an ambiguity on a generic relation (cw_source), which may be a penalty in multiple case * data feed sources are a new kind of source, namely 'copy based', which have no effect on the query planner * a data feed source is associated to a list of url and a parser (appobjects in the 'parsers' registry * entities imported by a data feed have cwuri set to their url on the distant site, their cw_source relation point to the data feed source, though their source stored in the entities table (returned by cw_metainformation) is their physical source, hence 'system'

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"""This module compare the Schema on the file system to the one in the database"""

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from cStringIO import StringIO

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from cubicweb.web.schemaviewer import SchemaViewer

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from logilab.common.ureports import TextWriter

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import difflib

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viewer = SchemaViewer()

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layout_db = viewer.visit_schema(schema, display_relations=True)

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layout_fs = viewer.visit_schema(fsschema, display_relations=True)

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writer = TextWriter()

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stream_db = StringIO()

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stream_fs = StringIO()

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writer.format(layout_db, stream=stream_db)

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writer.format(layout_fs, stream=stream_fs)

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stream_db.seek(0)

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stream_fs.seek(0)

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db = stream_db.getvalue().splitlines()

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fs = stream_fs.getvalue().splitlines()

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open('db_schema.txt', 'w').write(stream_db.getvalue())

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open('fs_schema.txt', 'w').write(stream_fs.getvalue())

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#for diff in difflib.ndiff(fs, db):

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#    print diff