from __future__ import unicode_literals

from pre_commit.languages import helpers
from pre_commit.xargs import xargs


ENVIRONMENT_DIR = None
get_default_version = helpers.basic_get_default_version


def install_environment(repo_cmd_runner, version, additional_dependencies):
    """Installation for system type is a noop."""
    raise AssertionError('Cannot install system repo.')


def run_hook(repo_cmd_runner, hook, file_args):
    return xargs(helpers.to_cmd(hook), file_args)