import os


source_root = None


class Environment:
    def set_source_root(path):
        global source_root
        source_root = path


    def source_root():
        global source_root
        return source_root


    def build_root():
        global source_root
        return os.path.join(source_root, 'build')


    def system_root():
        return os.path.join(Environment.build_root(), 'target-root')


    def native_root():
        return os.path.join(Environment.build_root(), 'host-root')