annotate tests/hghaveaddon.py @ 3870:e0bf44befd6e

evolve: exclude "identical" precursors from the precursors set

I'm not sure it is the right thing to do, but it simply thing a lot for now.
Otherwise, using 'precursors' to find rewind direction become too complex.

This is going to give problematic result in case of prune. Since there are no
other precursors to follow.

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