Centralize CI build JDK, update with Renovate (#1596)

.github/renovate.json5

@@ -0,0 +1,26 @@
+{
+  $schema: 'https://docs.renovatebot.com/renovate-schema.json',
+  extends: [
+    'config:recommended',
+  ],
+  ignorePresets: [
+    // Ensure we get the latest version and are not pinned to old versions.
+    'workarounds:javaLTSVersions',
+  ],
+  customManagers: [
+    // Update .java-version file with the latest JDK version.
+    {
+      customType: 'regex',
+      fileMatch: [
+        '\\.java-version$',
+      ],
+      matchStrings: [
+        '(?<currentValue>.*)\\n',
+      ],
+      datasourceTemplate: 'java-version',
+      depNameTemplate: 'java',
+      // Only write the major version.
+      extractVersionTemplate: '^(?<version>\\d+)',
+    },
+  ]
+}

.github/workflows/.java-version

@@ -0,0 +1 @@
+19

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
           - 8
           - 11
           - 17
-          - 19
+          - latest
 
     steps:
       - name: Checkout
@@ -32,11 +32,10 @@ jobs:
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v4
 
-      - name: Configure JDK
-        uses: actions/setup-java@v4
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 19
+          java-version-file: .github/workflows/.java-version
 
       - name: Test
         run: |
@@ -56,7 +55,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 19
+          java-version-file: .github/workflows/.java-version
 
       - uses: gradle/actions/setup-gradle@v4
 
@@ -78,11 +77,10 @@ jobs:
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v4
 
-      - name: Configure JDK
-        uses: actions/setup-java@v4
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 19
+          java-version-file: .github/workflows/.java-version
 
       - name: Test
         run: |
@@ -103,11 +101,10 @@ jobs:
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v4
 
-      - name: Configure JDK
-        uses: actions/setup-java@v4
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 19
+          java-version-file: .github/workflows/.java-version
 
       - name: Test
         if: matrix.os != 'windows-latest'
@@ -135,11 +132,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Configure JDK
-        uses: actions/setup-java@v4
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 19
+          java-version-file: .github/workflows/.java-version
 
       - name: Upload Artifacts
         run: |
@@ -161,11 +157,10 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Configure JDK
-        uses: actions/setup-java@v4
+      - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 19
+          java-version-file: .github/workflows/.java-version
 
       - name: Set up Python
         uses: actions/setup-python@v5

.github/workflows/release.yaml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/setup-java@v4
         with:
           distribution: 'zulu'
-          java-version: 19
+          java-version-file: .github/workflows/.java-version
 
       - run: ./gradlew publish
         env:

build.gradle.kts

@@ -192,12 +192,14 @@ subprojects {
     targetCompatibility = JavaVersion.VERSION_1_8.toString()
   }
 
-  val testJavaVersion = System.getProperty("test.java.version", "19").toInt()
+  val testJavaVersion = System.getProperty("test.java.version", "").toIntOrNull()
   tasks.withType<Test> {
     val javaToolchains = project.extensions.getByType<JavaToolchainService>()
-    javaLauncher.set(javaToolchains.launcherFor {
-      languageVersion.set(JavaLanguageVersion.of(testJavaVersion))
-    })
+    if (testJavaVersion != null) {
+      javaLauncher.set(javaToolchains.launcherFor {
+        languageVersion.set(JavaLanguageVersion.of(testJavaVersion))
+      })
+    }
 
     testLogging {
       events(STARTED, PASSED, SKIPPED, FAILED)