Keep your keys on an encrypted drive

add_key.sh

#!/usr/bin/env bash

HOURS=$1

if [ -z $HOURS ]; then
  CURRENT_HOUR=$(date +"%H")
  QUITTING_HOUR=18
  MARGIN_OF_ERROR=1

  HOURS=$(expr $QUITTING_HOUR - $CURRENT_HOUR + $MARGIN_OF_ERROR)
fi

RED="\033[31m"
CLEAR="\033[0m"

MESSAGE="Don't forget your house keys."
trap 'echo -e "$RED$MESSAGE$CLEAR"' EXIT

ssh-add -D
ssh-add -t ${HOURS}H $(dirname $0)/id_rsa

typeahead() {
  TYPING=0.02

  GOAL_PRINT=$1
  BASE_PRINT=$2

  if [ -z $BASE_PRINT ]; then
    BASE_PRINT=1
  fi

  for i in $(seq $BASE_PRINT ${#GOAL_PRINT});
  do
    echo -en "\r$RED${GOAL_PRINT:0:$i}$CLEAR"
    sleep $TYPING
  done
}

typeahead "Working......"
sleep 0.2
typeahead "Working...... please wait." 14
echo

diskutil umount force $(dirname $0)