#!/usr/bin/env bash

set -u
set -e

usage() {
    cat <<EOF
Usage: build <target>

Build an AMI for the target configuration

Examples
  build ubuntu-bionic-amd64

EOF

    exit 2
}

if [[ $# -ne 1 ]]; then
     usage
fi

target="${1/%.pkr.hcl/}"

directory="$(dirname "$0")"
cd "${directory}"

if ! test -f "${target}.pkr.hcl"; then
    echo "${target}.pkr.hcl is not present" >&2
    exit 1
fi

sha=$(git log -n 1 --pretty=format:%H "${directory}")
echo packer build --var "build_sha=${sha}" "${target}.pkr.hcl"
packer build --var "build_sha=${sha}" "${target}.pkr.hcl"