update.sh

#!/bin/bash
set -ue

. functions.sh

cd "$(cd "${0%/*}" && pwd -P)";

IFS=' ' read -ra versions <<< "$(get_versions . "$@")"
if [ ${#versions[@]} -eq 0 ]; then
	fatal "No valid versions found!"
fi

# Global variables
# Get architecure and use this as target architecture for docker image
# See details in function.sh
# TODO: Should be able to specify target architecture manually
arch=$(get_arch)

yarnVersion="$(curl -sSL --compressed https://yarnpkg.com/latest-version)"

function update_node_version {

	local baseuri=$1
	shift
	local version=$1
	shift
	local template=$1
	shift
	local dockerfile=$1
	shift
	local variant=
	if [[ $# -eq 1 ]]; then
		variant=$1
		shift
	fi

	fullVersion="$(curl -sSL --compressed "$baseuri" | grep '<a href="v'"$version." | sed -E 's!.*<a href="v([^"/]+)/?".*!\1!' | cut -d'.' -f2,3| sort -n | tail -1)"
	(
		cp "$template" "$dockerfile"
		local fromprefix=
		if [[ "$arch" != "amd64" && "$variant" != "onbuild" ]]; then
			fromprefix="$arch\\/"
		fi

		sed -E -i.bak 's/^FROM (.*)/FROM '"$fromprefix"'\1/' "$dockerfile" && rm "$dockerfile".bak
		sed -E -i.bak 's/^(ENV NODE_VERSION |FROM .*node:).*/\1'"$version.${fullVersion:-0}"'/' "$dockerfile" && rm "$dockerfile".bak
		sed -E -i.bak 's/^(ENV YARN_VERSION ).*/\1'"$yarnVersion"'/' "$dockerfile" && rm "$dockerfile".bak

		# shellcheck disable=SC1004
		new_line=' \\\
'

		# Add GPG keys
		for key_type in "node" "yarn"
		do
			while read -r line
			do
				pattern="\"\\$\\{$(echo "$key_type" | tr '[:lower:]' '[:upper:]')_KEYS\\[@\\]\\}\""
				sed -E -i.bak -e "s/([ \\t]*)($pattern)/\\1${line}${new_line}\\1\\2/" "$dockerfile" && rm "$dockerfile".bak
			done < "keys/$key_type.keys"
			sed -E -i.bak "/$pattern/d" "$dockerfile" && rm "$dockerfile".bak
		done

		if [[ "${version/.*/}" -ge 10 ]]; then
			sed -E -i.bak 's/FROM (.*)alpine:3.4/FROM \1alpine:3.7/' "$dockerfile"
			rm "$dockerfile.bak"
		elif [[ "${version/.*/}" -ge 8 || "$arch" = "ppc64le" || "$arch" = "s390x" || "$arch" = "arm64" || "$arch" = "arm32v7" ]]; then
			sed -E -i.bak 's/FROM (.*)alpine:3.4/FROM \1alpine:3.6/' "$dockerfile"
			rm "$dockerfile.bak"
		fi
	)
}

function add_stage {
	local baseuri=$1
	shift
	local version=$1
	shift
	local variant=$1
	shift

	echo '    - stage: Build
      env:
         - NODE_VERSION: "'"$version"'"
         - VARIANT: "'"$variant"'"
' >> .travis.yml
}

echo '#### DO NOT MODIFY. THIS FILE IS AUTOGENERATED ####
' | cat - travis.yml.template > .travis.yml

for version in "${versions[@]}"; do
	# Skip "docs" and other non-docker directories
	[ -f "$version/Dockerfile" ] || continue

	info "Updating version $version..."

	parentpath=$(dirname "$version")
	versionnum=$(basename "$version")
	baseuri=$(get_config "$parentpath" "baseuri")

	add_stage "$baseuri" "$version" "default"
	update_node_version "$baseuri" "$versionnum" "$parentpath/Dockerfile.template" "$version/Dockerfile" &

	# Get supported variants according the target architecture
	# See details in function.sh
	IFS=' ' read -ra variants <<< "$(get_variants "$parentpath")"

	for variant in "${variants[@]}"; do
		# Skip non-docker directories
		[ -f "$version/$variant/Dockerfile" ] || continue
		add_stage "$baseuri" "$version" "$variant"
		update_node_version "$baseuri" "$versionnum" "$parentpath/Dockerfile-$variant.template" "$version/$variant/Dockerfile" "$variant" &
	done
done

wait
info "Done!"