Automate JDK CI upgrades using AdoptOpenJDK API

An issue is created if a new release is detected.

Closes gh-15164

ci/scripts/detect-jdk-updates.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+set -e
+
+case "$JDK_VERSION" in
+	java8)
+		 BASE_URL="https://api.adoptopenjdk.net/v2/info/releases/openjdk8"
+	;;
+	java11)
+		 BASE_URL="https://api.adoptopenjdk.net/v2/info/releases/openjdk11"
+	;;
+	*)
+		echo $"Unknown java version"
+		exit 1;
+esac
+
+response=$( curl -s ${BASE_URL}\?openjdk_impl\=hotspot\&os\=linux\&arch\=x64\&release\=latest\&type\=jdk )
+latest=$( jq -r '.binaries[0].binary_link' <<< "$response" )
+
+current=$( git-repo/ci/images/get-jdk-url.sh ${JDK_VERSION} )
+
+if [[ $current = $latest ]]; then
+	echo "Already up-to-date"
+	exit 0;
+fi
+
+existing_issues=$( curl -s https://api.github.com/repos/${GITHUB_ORGANIZATION}/${GITHUB_REPO}/issues\?labels\=${JDK_VERSION}-image-upgrade\&state\=open )
+parsed_issues=$(jq -r '.' <<< "$existing_issues" )
+if [[ ${parsed_issues} = [] ]]; then
+	curl \
+	-s \
+	-u ${GITHUB_USERNAME}:${GITHUB_PASSWORD} \
+	-H "Content-type:application/json" \
+	-d "{\"title\":\"Upgrade ${JDK_VERSION} version in CI image\",\"body\": \"${latest}\",\"labels\":[\"${JDK_VERSION}-image-upgrade\"]}"  \
+	-f \
+	-X \
+	POST "https://api.github.com/repos/${GITHUB_ORGANIZATION}/${GITHUB_REPO}/issues" > /dev/null || { echo "Failed to create issue" >&2; exit 1; }
+else
+	echo "Issue already exists."
+fi