Add JDK18 variant to CI pipeline

This commit adds a new JDK 18 variant to the CI build image and
configures a JDK18 build (sources compiled with JDK17, tests compiled
and run with JDK18) to the CI pipeline.

Closes spring-projectsgh-27607

ci/images/ci-image/Dockerfile

@@ -1,10 +1,11 @@
-FROM ubuntu:focal-20210827
+FROM ubuntu:focal-20211006
 
 ADD setup.sh /setup.sh
 ADD get-jdk-url.sh /get-jdk-url.sh
 RUN ./setup.sh
 
 ENV JAVA_HOME /opt/openjdk/java17
 ENV JDK17 /opt/openjdk/java17
+ENV JDK18 /opt/openjdk/java18
 
 ENV PATH $JAVA_HOME/bin:$PATH

ci/images/get-jdk-url.sh

@@ -2,10 +2,13 @@
 set -e
 
 case "$1" in
- java17)
- echo "https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17%2B35/OpenJDK17-jdk_x64_linux_hotspot_17_35.tar.gz"
- ;;
+ java17)
+ echo "https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17%2B35/OpenJDK17-jdk_x64_linux_hotspot_17_35.tar.gz"
+ ;;
+ java18)
+ echo "https://github.com/adoptium/temurin18-binaries/releases/download/jdk-2021-10-22-05-05-beta/OpenJDK-jdk_x64_linux_hotspot_2021-10-21-23-30.tar.gz"
+ ;;
  *)
- echo $"Unknown java version"
- exit 1
+ echo $"Unknown java version"
+ exit 1
 esac

ci/pipeline.yml

@@ -85,6 +85,13 @@ resources:
  source:
  <<: *docker-resource-source
  repository: ((docker-hub-organization))/spring-framework-ci-jdk17
+- name: every-morning
+ type: time
+ icon: alarm
+ source:
+ start: 8:00 AM
+ stop: 9:00 AM
+ location: Europe/Vienna
 - name: artifactory-repo
  type: artifactory-resource
  icon: package-variant
@@ -109,6 +116,14 @@ resources:
  access_token: ((github-ci-status-token))
  branch: ((branch))
  context: 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
@@ -198,6 +213,34 @@ jobs:
  "zip.type": "schema"
  get_params:
  threads: 8
+- name: jdk18-build
+ serial: true
+ public: true
+ plan:
+ - get: ci-image
+ - get: git-repo
+ - get: every-morning
+ trigger: true
+ - put: repo-status-jdk18-build
+ params: { state: "pending", commit: "git-repo" }
+ - do:
+ - task: check-project
+ image: ci-image
+ file: git-repo/ci/tasks/check-project.yml
+ privileged: true
+ timeout: ((task-timeout))
+ params:
+ TEST_TOOLCHAIN: 18
+ <<: *build-project-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" }
 - name: build-pull-requests
  serial: true
  public: true
@@ -379,7 +422,7 @@ jobs:
 
 groups:
 - name: "builds"
- jobs: ["build"]
+ jobs: ["build", "jdk18-build"]
 - name: "releases"
  jobs: ["stage-milestone", "stage-rc", "stage-release", "promote-milestone", "promote-rc", "promote-release", "create-github-release"]
 - name: "ci-images"