'The value of the received tool_shed_repository_install_dir is the root installation directory
of the repository containing the tool dependency, and the value of the received install_dir is
the root installation directory of the tool dependency.'

def __init__(self, app, tool_shed_repository_install_dir, install_dir):

    self.app = app
    self.env_shell_file_paths = []
    self.install_dir = install_dir
    self.tool_shed_repository_install_dir = tool_shed_repository_install_dir
    self.tmp_work_dir = os.path.abspath(tempfile.mkdtemp(prefix='tmp-toolshed-mtd'))
