mercurial/revlogutils/deltas.py

39486:43d92d68ac88

    """
    gdelta = revlog._generaldelta
    curr = len(revlog)
    prev = curr - 1

    # should we try to build a delta?
    if prev != nullrev and revlog._storedeltachains:
        tested = set()
        # This condition is true most of the time when processing
        # changegroup data into a generaldelta repo. The only time it
        # isn't true is if this is the first revision in a delta chain
        # or if ``format.generaldelta=true`` disabled ``lazydeltabase``.
        if cachedelta and gdelta and revlog._lazydeltabase:
            # Assume what we received from the server is a good choice
            # build delta will reuse the cache
            yield (cachedelta[0],)
            tested.add(cachedelta[0])

    # This condition is true most of the time when processing
    # changegroup data into a generaldelta repo. The only time it
    # isn't true is if this is the first revision in a delta chain
    # or if ``format.generaldelta=true`` disabled ``lazydeltabase``.
    if cachedelta and gdelta and revlog._lazydeltabase:

39487:931386a0b108

    """
    gdelta = revlog._generaldelta
    curr = len(revlog)
    prev = curr - 1

    # This condition is true most of the time when processing
    # changegroup data into a generaldelta repo. The only time it
    # isn't true is if this is the first revision in a delta chain
    # or if ``format.generaldelta=true`` disabled ``lazydeltabase``.
    if cachedelta and gdelta and revlog._lazydeltabase: