Docopt
Class methods
docopt_config(doc : String, argv : Array(String) = ARGV, config_file_path : String | Nil = nil, env_prefix : String | Nil = nil, help : Bool = true, version : String | Nil = nil, options_first : Bool = false, exit : Bool = true, io : IO = STDOUT, print_config_option : String | Nil = nil) : ConfigOptions
Main function to parse docopt with config file and environment variable support