#!/bin/sh

METADATA_BASEURL="http://169.254.169.254"
METADATA_TOKEN_PATH="latest/api/token"

# IMDS client code lifted from `ec2-metadata` from the ec2-utils package

function set_imds_token()
{
        if [ -z "${IMDS_TOKEN}" ];then
                IMDS_TOKEN=$(curl -s -f -X PUT -H "X-aws-ec2-metadata-token-ttl-seconds: 30" ${METADATA_BASEURL}/${METADATA_TOKEN_PATH})
                if [ "${?}" -gt 0 ] || [ -z "${IMDS_TOKEN}" ]; then
                        echo '[ERROR] Could not get IMDSv2 token. Instance Metadata might have been disabled or this is not an EC2 instance.'
                        exit 1
                fi
        fi
}

# param1 = query
function get_meta()
{
        local imds_out=$(curl -s -q -H "X-aws-ec2-metadata-token:${IMDS_TOKEN}" -f ${METADATA_BASEURL}/latest/${1})
        echo -n "${imds_out}"
}

set_imds_token

[ -n "$partition" ] || partition=$(get_meta meta-data/services/partition)

test -e /etc/os-release && os_release='/etc/os-release' || os_release='/usr/lib/os-release'
. "${os_release}"

case "$partition" in
    aws|aws-cn)
        cat << EOF
   ,     #_
   ~\_  ####_        ${PRETTY_NAME:-Amazon Linux 2}
  ~~  \_#####\\
  ~~     \###|       AL2 End of Life is ${SUPPORT_END:-2025-06-30}.
  ~~       \#/ ___
   ~~       V~' '->
    ~~~         /    A newer version of Amazon Linux is available!
      ~~._.   _/
         _/ _/       Amazon Linux 2023, GA and supported until 2028-03-15.
       _/m/'           https://aws.amazon.com/linux/amazon-linux-2023/

EOF
        ;;
    *)
        cat << EOF
   ,     #_
   ~\_  ####_        ${PRETTY_NAME:-Amazon Linux 2}
  ~~  \_#####\\
  ~~     \###|       AL2 End of Life is ${SUPPORT_END:-2025-06-30}.
  ~~       \#/ ___
   ~~       V~' '->
    ~~~         /
      ~~._.   _/
         _/ _/
       _/m/'

EOF
        ;;
esac