comparison mercurial/streamclone.py @ 50521:f697af015683

stream-clone: bail-out earlier if pull is partial

The `canperformstreamclone` function is bit messy. However it seems clearer to
me to process the very generic condition about "can we consider a stream-clone
at all", before checking if a stream-clone is requested and if a compatible
protocol can be negotiated with the server.

So I am doing some gratuitous movement so reorder conditional.

50520:0558866957fa

    # Streaming clone only works on an empty destination repository
    if len(repo):
        return False, None

    bundle2supported = False
    if pullop.canusebundle2:
        if b'v2' in pullop.remotebundle2caps.get(b'stream', []):
            bundle2supported = True
        # else

    # Ensures legacy code path uses available bundle2.
    if bundle2supported and not bundle2:
        return False, None
    # Ensures bundle2 doesn't try to do a stream clone if it isn't supported.
    elif bundle2 and not bundle2supported:
        return False, None

    # Streaming clone only works if all data is being requested.
    if pullop.heads:
        return False, None

    streamrequested = pullop.streamclonerequested

    # If we don't have a preference, let the server decide for us. This

50521:f697af015683

    # Streaming clone only works on an empty destination repository
    if len(repo):
        return False, None

    # Streaming clone only works if all data is being requested.
    if pullop.heads:
        return False, None

    bundle2supported = False
    if pullop.canusebundle2:
        if b'v2' in pullop.remotebundle2caps.get(b'stream', []):
            bundle2supported = True
        # else

    # Ensures legacy code path uses available bundle2.
    if bundle2supported and not bundle2:
        return False, None
    # Ensures bundle2 doesn't try to do a stream clone if it isn't supported.
    elif bundle2 and not bundle2supported:
        return False, None

    streamrequested = pullop.streamclonerequested

    # If we don't have a preference, let the server decide for us. This