mx.py 文件源码

def _sorted_unique_jdk_configs(configs):
    path_seen = set()
    unique_configs = [c for c in configs if c.home not in path_seen and not path_seen.add(c.home)]

    def _compare_configs(c1, c2):
        if c1 == _default_java_home:
            if c2 != _default_java_home:
                return 1
        elif c2 == _default_java_home:
            return -1
        if c1 in _extra_java_homes:
            if c2 not in _extra_java_homes:
                return 1
        elif c2 in _extra_java_homes:
            return -1
        return VersionSpec.__cmp__(c1.version, c2.version)
    return sorted(unique_configs, cmp=_compare_configs, reverse=True)