data.py 文件源码

def get_common_ancestor(args):
    # args are what we get after early command line parsing (usually
    # strings, but can be py.path.local objects as well)
    common_ancestor = None
    for arg in args:
        if str(arg)[0] == "-":
            continue
        p = py.path.local(arg)
        if common_ancestor is None:
            common_ancestor = p
        else:
            if p.relto(common_ancestor) or p == common_ancestor:
                continue
            elif common_ancestor.relto(p):
                common_ancestor = p
            else:
                shared = p.common(common_ancestor)
                if shared is not None:
                    common_ancestor = shared
    if common_ancestor is None:
        common_ancestor = py.path.local()
    elif not common_ancestor.isdir():
        common_ancestor = common_ancestor.dirpath()
    return common_ancestor