Set up CI with JDK 18

Closes gh-30104

ci/images/ci-image-jdk18/Dockerfile

@@ -0,0 +1,12 @@
+FROM ubuntu:focal-20220113
+
+ADD setup.sh /setup.sh
+ADD get-jdk-url.sh /get-jdk-url.sh
+ADD get-docker-url.sh /get-docker-url.sh
+RUN ./setup.sh java8 java18
+
+ENV JAVA_HOME /opt/openjdk
+ENV PATH $JAVA_HOME/bin:$PATH
+ADD docker-lib.sh /docker-lib.sh
+
+ENTRYPOINT [ "switch", "shell=/bin/bash", "--", "codep", "/bin/docker daemon" ]

ci/images/get-jdk-url.sh

@@ -11,6 +11,9 @@ case "$1" in
 	java17)
 		 echo "https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.2%2B8/OpenJDK17U-jdk_x64_linux_hotspot_17.0.2_8.tar.gz"
 	;;
+	java18)
+		 echo "https://github.com/adoptium/temurin18-binaries/releases/download/jdk18-2022-02-15-13-13-beta/OpenJDK18-jdk_x64_linux_hotspot_2022-02-15-13-13.tar.gz"
+	;;
   *)
 		echo $"Unknown java version"
 		exit 1

ci/pipeline.yml

@@ -175,6 +175,12 @@ resources:
   source:
     <<: *registry-image-resource-source
     repository: ((docker-hub-organization))/spring-boot-ci-jdk17
+- name: ci-image-jdk18
+  type: registry-image
+  icon: docker
+  source:
+    <<: *registry-image-resource-source
+    repository: ((docker-hub-organization))/spring-boot-ci-jdk18
 - name: artifactory-repo
   type: artifactory-resource
   icon: package-variant
@@ -207,6 +213,14 @@ resources:
     access_token: ((github-ci-status-token))
     branch: ((branch))
     context: jdk17-build
+- name: repo-status-jdk18-build
+  type: github-status-resource
+  icon: eye-check-outline
+  source:
+    repository: ((github-repo-name))
+    access_token: ((github-ci-status-token))
+    branch: ((branch))
+    context: jdk18-build
 - name: slack-alert
   type: slack-notification
   icon: slack
@@ -259,6 +273,14 @@ jobs:
       vars:
         ci-image-name: ci-image-jdk17
         <<: *docker-hub-mirror-vars
+    - task: build-ci-image-jdk18
+      privileged: true
+      file: git-repo/ci/tasks/build-ci-image.yml
+      output_mapping:
+        image: ci-image-jdk18
+      vars:
+        ci-image-name: ci-image-jdk18
+        <<: *docker-hub-mirror-vars
   - in_parallel:
     - put: ci-image
       params:
@@ -269,6 +291,9 @@ jobs:
     - put: ci-image-jdk17
       params:
         image: ci-image-jdk17/image.tar
+    - put: ci-image-jdk18
+      params:
+        image: ci-image-jdk18/image.tar
 - name: detect-jdk-updates
   plan:
   - get: git-repo
@@ -294,6 +319,12 @@ jobs:
       params:
         <<: *github-task-params
         JDK_VERSION: java17
+    - task: detect-jdk18-update
+      image: ci-image
+      file: git-repo/ci/tasks/detect-jdk-updates.yml
+      params:
+        <<: *github-task-params
+        JDK_VERSION: java18
 - name: detect-ubuntu-image-updates
   plan:
   - get: git-repo
@@ -438,6 +469,38 @@ jobs:
     - put: slack-alert
       params:
         <<: *slack-success-params
+- name: jdk18-build
+  serial: true
+  public: true
+  plan:
+    - get: ci-image-jdk18
+    - get: git-repo
+      trigger: true
+    - put: repo-status-jdk18-build
+      params: { state: "pending", commit: "git-repo" }
+    - do:
+        - task: build-project
+          image: ci-image-jdk18
+          privileged: true
+          timeout: ((task-timeout))
+          file: git-repo/ci/tasks/build-project.yml
+          params:
+            BRANCH: ((branch))
+            TOOLCHAIN_JAVA_VERSION: 18
+            <<: *gradle-enterprise-task-params
+            <<: *docker-hub-task-params
+      on_failure:
+        do:
+          - put: repo-status-jdk18-build
+            params: { state: "failure", commit: "git-repo" }
+          - put: slack-alert
+            params:
+              <<: *slack-fail-params
+    - put: repo-status-jdk18-build
+      params: { state: "success", commit: "git-repo" }
+    - put: slack-alert
+      params:
+        <<: *slack-success-params
 - name: windows-build
   serial: true
   plan:
@@ -691,7 +754,7 @@ jobs:
         repository: updated-homebrew-tap-repo
 groups:
 - name: "builds"
-  jobs: ["build", "jdk11-build", "jdk17-build", "windows-build"]
+  jobs: ["build", "jdk11-build", "jdk17-build", "jdk18-build", "windows-build"]
 - name: "releases"
   jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release", "publish-gradle-plugin", "publish-to-sdkman", "update-homebrew-tap"]
 - name: "ci-images"

ci/scripts/detect-jdk-updates.sh

@@ -20,6 +20,10 @@ case "$JDK_VERSION" in
 		 BASE_URL="https://api.adoptium.net/v3/assets/feature_releases/17/ga"
 		 ISSUE_TITLE="Upgrade Java 17 version in CI image"
 	;;
+	java18)
+		 BASE_URL="https://api.adoptium.net/v3/assets/feature_releases/18/ea"
+		 ISSUE_TITLE="Upgrade Java 18 version in CI image"
+	;;
 	*)
 		echo $"Unknown java version"
 		exit 1;