AWS: CLI for starting/stopping instance

#/bin/sh

export AWS_PROFILE=<profile>
MY_IP=$(curl -s ifconfig.co)
INSTANCE_ID=<instance>
SG=<sg>

if [[ $1 = "start" ]]; then
	echo Starting $INSTANCE_ID.
	aws ec2 start-instances --instance-ids $INSTANCE_ID > /dev/null
	aws ec2 wait instance-running --instance-ids $INSTANCE_ID
	echo Instance running.
	aws ec2 authorize-security-group-ingress --group-id $SG --port 8080 --cidr $MY_IP/32 --protocol tcp > /dev/null
	if [ $? -eq 0 ]; then
		echo New security group rule added to allow traffic from $MY_IP.
	else
		echo Security group already allows traffic from $MY_IP.
	fi
	sleep 15
	WW=$(aws ec2 describe-instances --instance-ids $INSTANCE_ID --query "Reservations[0].Instances[0].PublicIpAddress" --output text)
	echo Instance IP: $WW
	start http://$WW:8080
elif [[ $1 = "stop" ]]; then
	aws ec2 stop-instances --instance-ids $INSTANCE_ID > /dev/null
	echo Stopping instance.
else
  STATUS=$(aws ec2 describe-instances --instance-ids $INSTANCE_ID --query "Reservations[0].Instances[0].State.Name" --output text)
  echo Instance $INSTANCE_ID is $STATUS.
fi