ci(gameserver): build with multiple JDK versions

gameserver/Containerfile

@@ -1,4 +1,4 @@
-ARG server_img=docker.io/itzg/minecraft-server:java21-jdk
+ARG server_img=docker.io/itzg/minecraft-server:java21
 ARG agent_version
 
 FROM quay.io/cryostat/cryostat-agent-init:${agent_version} AS agent

gameserver/build.bash

@@ -14,21 +14,31 @@ trap cleanup EXIT
 BUILD_IMG="${APP_REGISTRY:-quay.io}/${APP_NAMESPACE:-redhat-java-monitoring}/${APP_NAME:-gameserver-cryostat-agent}"
 BUILD_TAG="${APP_VERSION:-latest}"
 CRYOSTAT_AGENT_VERSION="${CRYOSTAT_AGENT_VERSION:-0.5.0-SNAPSHOT}"
+IFS=', ' read -r -a ARCHS <<< "${IMAGE_ARCHS:-amd64 arm64}"
+IFS=', ' read -r -a JDKS <<< "${JDK_VERSIONS:-11 17 21}"
 
-podman manifest create "${BUILD_IMG}:${BUILD_TAG}"
+for jdk in "${JDKS[@]}"; do
+    podman manifest create "${BUILD_IMG}:${BUILD_TAG}-jdk${jdk}"
+done
 
-for arch in amd64 arm64; do
-    echo "Building for ${arch} ..."
-    podman build --build-arg agent_version="${CRYOSTAT_AGENT_VERSION,,}" --platform="linux/${arch}" -t "${BUILD_IMG}:linux-${arch}" -f "${DIR}/Containerfile" "${DIR}"
-    podman manifest add "${BUILD_IMG}:${BUILD_TAG}" containers-storage:"${BUILD_IMG}:linux-${arch}"
+for arch in "${ARCHS[@]}"; do
+  for jdk in "${JDKS[@]}"; do
+    echo "Building JDK ${jdk} for ${arch} ..."
+    podman build --build-arg server_img="docker.io/itzg/minecraft-server:java${jdk}" --build-arg agent_version="${CRYOSTAT_AGENT_VERSION,,}" --platform="linux/${arch}" -t "${BUILD_IMG}:linux-${arch}-jdk${jdk}" -f "${DIR}/Containerfile" "${DIR}"
+    podman manifest add "${BUILD_IMG}:${BUILD_TAG}-jdk${jdk}" containers-storage:"${BUILD_IMG}:linux-${arch}-jdk${jdk}"
+  done
 done
 
 for tag in ${TAGS}; do
-    podman tag "${BUILD_IMG}:${BUILD_TAG}" "${BUILD_IMG}:${tag}"
+    for jdk in "${JDKS[@]}"; do
+        podman tag "${BUILD_IMG}:${BUILD_TAG}-jdk${jdk}" "${BUILD_IMG}:${tag}-jdk${jdk}"
+    done
 done
 
 if [ "${PUSH_MANIFEST}" = "true" ]; then
     for tag in ${TAGS}; do
-        podman manifest push "${BUILD_IMG}:${tag}" "docker://${BUILD_IMG}:${tag}"
+        for jdk in "${JDKS[@]}"; do
+            podman manifest push "${BUILD_IMG}:${tag}-jdk${jdk}" "docker://${BUILD_IMG}:${tag}-jdk${jdk}"
+        done
     done
 fi