update

  TOOL_BIN=$1

  TOOL_NAME=$2

  if [ -z "$(which $TOOL_BIN)" ]; then

    if [ -z "$TOOL_VERSIONS" ]; then

    echo "[$TOOL_BIN] is not found!"

    else

    if [ -z "$TOOL_VERSIONS" ]; then

      if [ -n "$(grep -v -e '^[[:space:]]*#' $HOME/.tool-versions | cut -s -d ' ' -f 1 | grep -w $TOOL_NAME)" ]; then

        echo "[$TOOL_NAME] should be installed with [asdf-bootstrap]!"

      else

        echo "[$TOOL_NAME] is not found!"

        echo " * [$TOOL_NAME] could be installed with [asdf]!"

      fi

    fi

    if [ -n "$(which apt)" ]; then

      if [ -n "$(apt-file search -l $TOOL_BIN | grep -x $TOOL_NAME)" ]; then

        echo " * [$TOOL_NAME] could be installed with [apt]!"

      fi

    fi

  fi