docs: def compile_file(env, src_path, dst_path, encoding='utf-8', base_dir=''):
    """Compiles a Jinja2 template to python code.
  
    :param env: a Jinja2 Environment instance.
    :param src_path: path to the source file.
    :param dst_path: path to the destination file.
    :param encoding: template encoding.
    :param base_dir: the base path to be removed from the compiled template filename.
    """
    src_file = file(src_path, 'r')
    source = src_file.read().decode(encoding)
    name = src_path.replace(base_dir, '')
    raw = env.compile(source, name=name, filename=name, raw=True)
    src_file.close()
  
    dst_file = open(dst_path, 'w')
    dst_file.write(raw)
    dst_file.close()