_gtk4_path_tool()
{
    local cur prev cmd opts
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"

    if [[ "$COMP_CWORD" == "1" ]] ; then
      local commands="decompose reverse restrict show render info"
      COMPREPLY=( $(compgen -W "${commands}" -- ${cur}) )
      return 0
    fi

    cmd="${COMP_WORDS[1]}"

    case "${prev}" in
        --start|--end)
            return 0
            ;;
        --fg-color|--bg-color|--point-color)
            return 0
            ;;
        --)
            return 0
            ;;
    esac

    case "${cmd}" in
        decompose)
            opts="--help --allow-quad --allow-cubic --allow-conic"
            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
            return 0
            ;;

        reverse|info)
            opts="--help"
            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
            return 0
            ;;

        restrict)
            opts="--help --start --end"
            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
            return 0
            ;;

        show|render)
            opts="--help --help-all --help-fill --help-stroke --fill --stroke --points --controls --fg-color --bg-color --point-color --fill-rule --line-width --line-join --miter-limit --dashes --dash-offset --zoom"
            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
            return 0
            ;;

    esac
}
complete -F _gtk4_path_tool gtk4-path-tool