update.sh

#!/bin/bash

set -ueo pipefail

cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"

paths=( "$@" )
if [ ${#paths[@]} -eq 0 ]; then
	paths=( */ )
fi
paths=( "${paths[@]%/}" )

MAVEN_METADATA_URL='https://repo1.maven.org/maven2/org/eclipse/jetty/jetty-distribution/maven-metadata.xml'

available=( $( curl -sSL "$MAVEN_METADATA_URL" | grep -Eo '<(version)>[^<]*</\1>' | awk -F'[<>]' '{ print $3 }' | sort -Vr ) )

for path in "${paths[@]}"; do
	version="${path%%-*}" # "9.2"
	suffix="${path#*-}" # "jre7"

	baseImage='openjdk'
	case "$suffix" in
		jre*|jdk*)
			baseImage+=":${suffix:3}-${suffix:0:3}" # ":7-jre"
			;;
	esac

	milestones=()
	releaseCandidates=()
	fullReleases=()
	for candidate in "${available[@]}"; do
		if [[ "$candidate" == "$version".* ]]; then
			if [[ "$candidate" == *.M* ]]; then
				milestones+=("$candidate")
			elif [[ "$candidate" == *.RC* ]]; then
				releaseCandidates+=("$candidate")
			elif [[ "$candidate" == *.v* ]]; then
				fullReleases+=("$candidate")
			fi
		fi
	done

	fullVersion=
	if [ -n "${fullReleases-}" ]; then
		fullVersion="$fullReleases"
	elif [ -n "${releaseCandidates-}" ]; then
		fullVersion="$releaseCandidates"
	elif [ -n "${milestones-}" ]; then
		fullVersion="$milestones"
	fi

	if [ -z "$fullVersion" ]; then
		echo >&2 "Unable to find Jetty package for $path"
		exit 1
	fi

	for variant in alpine ''; do
		[ -d "$path/$variant" ] || continue
		(
			set -x
			cp docker-entrypoint.sh generate-jetty-start.sh "$path/$variant"
			sed -ri '
				s/^(FROM) .*/\1 '"$baseImage${variant:+-$variant}"'/;
				s/^(ENV JETTY_VERSION) .*/\1 '"$fullVersion"'/;
			' "$path/$variant/Dockerfile"
		)
	done
done