import hghave

@hghave.check("docgraph-ext", "Extension to generate graph from repository")

def docgraph():

    try:

        import hgext.docgraph

        hgext.docgraph.cmdtable # trigger import

    except ImportError:

        try:

            import hgext3rd.docgraph

            hgext3rd.docgraph.cmdtable # trigger import

        except ImportError:

            return False

    return True