bash_autocomplete

_factorio() 
{
    local cur prev opts base
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"

    # basic options
    opts=`factorio listcommands 2> /dev/null`

    # command arguments
    case "${prev}" in
        chatlog)
            COMPREPLY=( $(compgen -W "-t --tail" -- ${cur}) )
            return 0
            ;;
        update)
            COMPREPLY=( $(compgen -W "--dry-run" -- ${cur}) )
            return 0
            ;;
        new-game|load-save|save-game)
            COMPREPLY=( $(compgen -W "`factorio listsaves 2> /dev/null`" -- ${cur}) )
            return 0
            ;;
    esac

    COMPREPLY=($(compgen -W "${opts}" -- ${cur}))  
    return 0
}
complete -F _factorio factorio