aws-cloudformation-validate-template

#!/usr/bin/env bash
set -euo pipefail

YP_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." >/dev/null && pwd)"
source ${YP_DIR}/sh/common.inc.sh

#- aws-cloudformation-validate-template 1.0
## Usage: aws-cloudformation-validate-template [OPTION]
## Validate a CloudFormation template.
##
##   --template-body       Translated to --template-url. This works around the lower size limits of template-body vs template-url
##   --template-url-prefix Location to upload template body
##
##   -h, --help     Display this help and exit
##   -v, --version  Output version information and exit

TEMPLATE_BODY_ARG=
TEMPLATE_BODY=
TEMPLATE_URL_PREFIX=

if { getopt --test >/dev/null 2>&1 && false; } || [[ "$?" = "4" ]] || false; then
    ARGS=$(getopt -o hv -l help,version,template-body:,template-url-prefix: -n $(basename ${BASH_SOURCE[0]}) -- "$@") || sh_script_usage # editorconfig-checker-disable-line
    eval set -- "${ARGS}"
fi

while [[ $# -gt 0 ]]; do
    case "$1" in
        --template-body)
            TEMPLATE_BODY="$2"
            TEMPLATE_BODY_ARG="$1 $2"
            shift 2
            ;;
        --template-url-prefix)
            TEMPLATE_URL_PREFIX="$2"
            TEMPLATE_URL="$2/$(uuidgen)"
            TEMPLATE_BODY_ARG="--template-url https://s3.amazonaws.com/${TEMPLATE_URL}"
            shift 2
            ;;
        -h|--help)
            sh_script_usage
            ;;
        -v|--version)
            sh_script_version
            ;;
        --)
            shift
            break
            ;;
        -*)
            sh_script_usage
            ;;
        *)
            break
            ;;
    esac
done
[[ $# -eq 0 ]] || sh_script_usage

function on_exit() {
    if [[ -n ${TEMPLATE_URL_PREFIX} ]]; then
        aws s3 rm s3://${TEMPLATE_URL} || true
    fi
}

trap on_exit EXIT

if [[ -n ${TEMPLATE_URL_PREFIX} ]]; then
    aws s3 cp ${TEMPLATE_BODY#file://} s3://${TEMPLATE_URL}
fi

aws cloudformation validate-template ${TEMPLATE_BODY_ARG}