cl-bcgreek/zsh/_bcgreek

#compdef bcgreek

_bcgreek() {
    local -a args
    args=(
        '(-s --final-sigma)[automatically convert S into final sigma]'
        '(-f --file)'{-x,--string}'[process string]:string'
        '(-x --string)'{-f,--file}'[input file]:file:_files'
        {-o,--output}'[output file]:file:_files'
            '(- *)'{-h,--help}'[help]'
        )

    _arguments -s ${args}
}