script/build -- Templated helm chart generation

build

#!/usr/bin/env bash

set -euo pipefail

main() {
	local market stage branch build_number src_directory destination_directory
	local name version chart_version

	version="$(cat VERSION)"

	while getopts :s:d:m:S:b:g:n: opt; do
		case "${opt}" in
			s)
				src_directory="${OPTARG}"
				;;
			d)
				destination_directory="${OPTARG}"
				;;
			m)
				market="${OPTARG}"
				;;
			S)
				stage="${OPTARG}"
				;;
			b)
				branch="${OPTARG}"
				;;
			g)
				gitsha="${OPTARG}"
				;;
			n)
				build_number="${OPTARG}"
				;;
			\?)
				echo "Invalid option -${OPTARG}" 1>&2
				return 1
				;;
			:)
				echo "Option -${OPTARG} requires an argument" 1>&2
				return 1
				;;
		esac
	done

	if [ -z "${src_directory:-}" ] || [ -z "${destination_directory:-}" ]; then
		echo "-s and -d are required" 1>&2
		return 1
	fi

	if [ ! -d "${src_directory}" ]; then
		echo "${src_directory} does not exist!" 1>&2
		return 1
	fi

	if [ -z "${market:-}" ]; then
		echo "-m required" 1>&2
		return 1
	fi

	if [ -z "${stage:-}" ]; then
		echo "-e stage" 1>&2
		return 1
	fi

	if [ "${stage:-}" = 'sandbox' ] && [ -z "${branch:-}" ]; then
		echo "-e sandbox requires -b" 1>&2
		return 1
	fi

	if [ -n "${branch:-}" ] && [ -z "${build_number:-}" ]; then
		echo "-b requires -n" 1>&2
		return 1
	fi

	if ! [[ "${build_number:-}" =~ ^[0-9]+$ ]]; then
		echo "-n must be numeric, did you provide a build number?" 1>&2
		return 1
	fi

	if [ -z "${gitsha:-}" ]; then
		echo "-g is required" 1>&2
		return 1
	fi

	case "${stage}" in
		production)
			chart_version="${version}"
			;;
		sandbox)
			chart_version="${version}-beta.${build_number}+${branch//[^0-9A-Za-z-]/-}.g${gitsha}"
			;;
		staging)
			chart_version="${version}-rc.${build_number}+${branch//[^0-9A-Za-z-]/-}.g${gitsha}"
			;;
		*)
			echo "Do not know how to consturct version for ${stage}" 1>&2
			return 1
			;;
	esac

	local chart_name="kviberg-${market}"
	local chart_id="${chart_name}-${chart_version//+/-}"
	destination_directory="${destination_directory}/${stage}/${chart_name}"

	if [ ${#chart_id} -gt 63 ]; then
		echo "chart id '${chart_id}' too long" 1>&2
		return 1
	fi

	if [ -d "${destination_directory}" ]; then
		echo "${destination_directory} already exists" 1>&2
		return 1
	fi

	mkdir -p "${destination_directory}"
	cp -r "${src_directory}/"* "${destination_directory}"

	echo "--- Building ${chart_id}"

	for file in values.yaml Chart.yaml; do
		env \
			"CHART_ID=${chart_id}" \
			"CHART_NAME=${chart_name}" \
			"CHART_MARKET=${market}" \
			"CHART_VERSION=${chart_version}" \
			"CHART_STAGE=${stage}" \
			"CHART_COMMIT=${gitsha}" \
			envsubst < "config/${file}" > "${destination_directory}/${file}"
	done

	echo "Built chart ${market} ${chart_version} in ${destination_directory}"
}

main "$@"