#!/bin/bash
set -e

PACKER_BUILD_NAME="${PACKER_BUILD_NAME}"
NAME="${NAME}"
TIMESTAMP="${TIMESTAMP}"
OUTPUT="${OUTPUT}"

if ! command -v md5sum &>/dev/null; then
    printf "%s\n" "[WARN] md5sum not found, skipping"
    exit 0
fi

if ! command -v sha512sum &>/dev/null; then
    printf "%s\n" "[WARN] sha512sum not found, skipping"
    exit 0
fi

if test -z "${PACKER_BUILD_NAME}" || test -z "${NAME}" || test -z "${TIMESTAMP}"; then
    printf "%s\n" "[WARN] \$PACKER_BUILD_NAME|\$NAME|\$TIMESTAMP not supplied for checksum creation, skipping"
    exit 0
fi

if test "${OUTPUT}"; then
    OUTPUT_DIR="${OUTPUT}/${PACKER_BUILD_NAME}"
else
    OUTPUT_DIR="output/${PACKER_BUILD_NAME}"
fi

mkdir -p "${OUTPUT_DIR}" &>/dev/null

if test "${PACKER_BUILD_NAME#*qemu*}" != "${PACKER_BUILD_NAME}"; then
    FILENAME="${PACKER_BUILD_NAME}-${NAME}_${TIMESTAMP}.qcow2"
    ARTEFACT="${OUTPUT_DIR}/${FILENAME}"
    mv "${PACKER_BUILD_NAME}_${NAME}/${PACKER_BUILD_NAME}-${NAME}_${TIMESTAMP}" "${ARTEFACT}"
    (
        cd "${OUTPUT_DIR}"
        md5sum "${FILENAME}" > "${FILENAME}.sums"
        sha512sum "${FILENAME}" >> "${FILENAME}.sums"
    )
else
    printf "%s\n" "[err] unknown packer builder type"
    exit 1
fi
rm -rf "${PACKER_BUILD_NAME}_output_${NAME}"

printf "%s\n" "[INFO] created md5 and sha512 checksums for ${OUTPUT_DIR}/${FILENAME}"