view tests/hghaveaddon.py @ 3123:237b39bf7e6b stable

topic: instroduce a fast path when computing stack

We do some stack related computation during transaction now. The current
inefficiency of the revset is hurting us too much. We pre-compute a subset using
native set operation to speed things up.

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