Introduce basic GHA support

This commit adds support for building and deploying snapshots to
repo.spring.io as well as building pull requests.

See gh-1809

.github/actions/build/action.yml

@@ -0,0 +1,73 @@
+name: 'Build'
+description: 'Builds the project, optionally publishing it to a local deployment repository'
+inputs:
+  develocity-access-key:
+    description: 'Access key for authentication with ge.spring.io'
+    required: false
+  java-distribution:
+    description: 'Java distribution to use'
+    required: false
+    default: 'liberica'
+  java-early-access:
+    description: 'Whether the Java version is in early access'
+    required: false
+    default: 'false'
+  java-toolchain:
+    description: 'Whether a Java toolchain should be used'
+    required: false
+    default: 'false'
+  java-version:
+    description: 'Java version to compile and test with'
+    required: false
+    default: '17'
+  opensource-repository-password:
+    description: 'Password for authentication with the open-source repository'
+    required: false
+  opensource-repository-username:
+    description: 'Username for authentication with the open-source repository'
+    required: false
+  publish:
+    description: 'Whether to publish artifacts ready for deployment to Artifactory'
+    required: false
+    default: 'false'
+outputs:
+  build-scan-url:
+    description: 'URL, if any, of the build scan produced by the build'
+    value: ${{ (inputs.publish == 'true' && steps.publish.outputs.build-scan-url) || steps.build.outputs.build-scan-url }}
+  version:
+    description: 'Version that was built'
+    value: ${{ steps.read-version.outputs.version }}
+runs:
+  using: composite
+  steps:
+    - name: Prepare Gradle Build
+      uses: ./.github/actions/prepare-gradle-build
+      with:
+        develocity-access-key: ${{ inputs.develocity-access-key }}
+        java-distribution: ${{ inputs.java-distribution }}
+        java-early-access: ${{ inputs.java-early-access }}
+        java-toolchain: ${{ inputs.java-toolchain }}
+        java-version: ${{ inputs.java-version }}
+    - name: Build
+      id: build
+      if: ${{ inputs.publish == 'false' }}
+      shell: bash
+      env:
+        SPRING_REPOSITORY_PASSWORD: ${{ inputs.opensource-repository-password }}
+        SPRING_REPOSITORY_USERNAME: ${{ inputs.opensource-repository-username }}
+      run: ./gradlew check
+    - name: Publish
+      id: publish
+      if: ${{ inputs.publish == 'true' }}
+      shell: bash
+      env:
+        SPRING_REPOSITORY_PASSWORD: ${{ inputs.opensource-repository-password }}
+        SPRING_REPOSITORY_USERNAME: ${{ inputs.opensource-repository-username }}
+      run: ./gradlew -PdeploymentRepository=$(pwd)/deployment-repository build dist publishAllPublicationsToDeploymentRepository
+    - name: Read Version From gradle.properties
+      id: read-version
+      shell: bash
+      run: |
+        version=$(sed -n 's/version=\(.*\)/\1/p' gradle.properties)
+        echo "Version is $version"
+        echo "version=$version" >> $GITHUB_OUTPUT

.github/actions/prepare-gradle-build/action.yml

@@ -0,0 +1,53 @@
+name: Prepare Gradle Build
+description: 'Prepares a Gradle build. Sets up Java and Gradle and configures Gradle properties'
+inputs:
+  develocity-access-key:
+    description: 'Access key for authentication with ge.spring.io'
+    required: false
+  java-distribution:
+    description: 'Java distribution to use'
+    required: false
+    default: 'liberica'
+  java-early-access:
+    description: 'Whether the Java version is in early access. When true, forces java-distribution to temurin'
+    required: false
+    default: 'false'
+  java-toolchain:
+    description: 'Whether a Java toolchain should be used'
+    required: false
+    default: 'false'
+  java-version:
+    description: 'Java version to use for the build'
+    required: false
+    default: '17'
+runs:
+  using: composite
+  steps:
+    - name: Set Up Java
+      uses: actions/setup-java@v4
+      with:
+        distribution: ${{ inputs.java-early-access == 'true' && 'temurin' || (inputs.java-distribution || 'liberica') }}
+        java-version: |
+          ${{ inputs.java-early-access == 'true' && format('{0}-ea', inputs.java-version) || inputs.java-version }}
+          ${{ inputs.java-toolchain == 'true' && '17' || '' }}
+    - name: Set Up Gradle
+      uses: gradle/actions/setup-gradle@d156388eb19639ec20ade50009f3d199ce1e2808 # v4.1.0
+      with:
+        cache-read-only: false
+        develocity-access-key: ${{ inputs.develocity-access-key }}
+    - name: Configure Gradle Properties
+      shell: bash
+      run: |
+        mkdir -p $HOME/.gradle
+        echo 'systemProp.user.name=spring-builds+github' >> $HOME/.gradle/gradle.properties
+        echo 'systemProp.org.gradle.internal.launcher.welcomeMessageEnabled=false' >> $HOME/.gradle/gradle.properties
+        echo 'org.gradle.daemon=false' >> $HOME/.gradle/gradle.properties
+        echo 'org.gradle.daemon=4' >> $HOME/.gradle/gradle.properties
+    - name: Configure Toolchain Properties
+      if: ${{ inputs.java-toolchain == 'true' }}
+      shell: bash
+      run: |
+        echo toolchainVersion=${{ inputs.java-version }} >> $HOME/.gradle/gradle.properties
+        echo systemProp.org.gradle.java.installations.auto-detect=false >> $HOME/.gradle/gradle.properties
+        echo systemProp.org.gradle.java.installations.auto-download=false >> $HOME/.gradle/gradle.properties
+        echo systemProp.org.gradle.java.installations.paths=${{ format('$JAVA_HOME_{0}_X64', inputs.java-version) }} >> $HOME/.gradle/gradle.properties

.github/actions/print-jvm-thread-dumps/action.yml

@@ -0,0 +1,17 @@
+name: Print JVM thread dumps
+description: 'Prints a thread dump for all running JVMs'
+runs:
+  using: composite
+  steps:
+    - if: ${{ runner.os == 'Linux' }}
+      shell: bash
+      run: |
+        for jvm_pid in $(jps -q -J-XX:+PerfDisableSharedMem); do
+          jcmd $jvm_pid Thread.print
+        done
+    - if: ${{ runner.os == 'Windows' }}
+      shell: powershell
+      run: |
+        foreach ($jvm_pid in $(jps -q -J-XX:+PerfDisableSharedMem)) {
+          jcmd $jvm_pid Thread.print
+        }

.github/actions/send-notification/action.yml

@@ -0,0 +1,39 @@
+name: Send Notification
+description: 'Sends a Google Chat message as a notification of the job''s outcome'
+inputs:
+  build-scan-url:
+    description: 'URL of the build scan to include in the notification'
+    required: false
+  run-name:
+    description: 'Name of the run to include in the notification'
+    required: false
+    default: ${{ format('{0} {1}', github.ref_name, github.job) }}
+  status:
+    description: 'Status of the job'
+    required: true
+  webhook-url:
+    description: 'Google Chat Webhook URL'
+    required: true
+runs:
+  using: composite
+  steps:
+    - name: Prepare Variables
+      shell: bash
+      run: |
+        echo "BUILD_SCAN=${{ inputs.build-scan-url == '' && ' [build scan unavailable]' || format(' [<{0}|Build Scan>]', inputs.build-scan-url) }}" >> "$GITHUB_ENV"
+        echo "RUN_URL=${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}" >> "$GITHUB_ENV"
+    - name: Success Notification
+      if: ${{ inputs.status == 'success' }}
+      shell: bash
+      run: |
+        curl -X POST '${{ inputs.webhook-url }}' -H 'Content-Type: application/json' -d '{ text: "<${{ env.RUN_URL }}|${{ inputs.run-name }}> was successful ${{ env.BUILD_SCAN }}"}' || true
+    - name: Failure Notification
+      if: ${{ inputs.status == 'failure' }}
+      shell: bash
+      run: |
+        curl -X POST '${{ inputs.webhook-url }}' -H 'Content-Type: application/json' -d '{ text: "<users/all> *<${{ env.RUN_URL }}|${{ inputs.run-name }}> failed* ${{ env.BUILD_SCAN }}"}' || true
+    - name: Cancel Notification
+      if: ${{ inputs.status == 'cancelled' }}
+      shell: bash
+      run: |
+        curl -X POST '${{ inputs.webhook-url }}' -H 'Content-Type: application/json' -d '{ text: "<${{ env.RUN_URL }}|${{ inputs.run-name }}> was cancelled"}' || true