GitHub Actions: build using Java 19 (use toolchain because Gradle 7.5.1 does not support running on Java 19)

.github/workflows/ci.yml

@@ -26,6 +26,10 @@ jobs:
           - 8
           - 11  # LTS
           - 17  # LTS
+        toolchain: [""]
+        include:
+          - java: 17
+            toolchain: 19  # latest
 
     steps:
       - uses: actions/checkout@v3
@@ -41,7 +45,7 @@ jobs:
           cache: gradle
 
       - name: Build with Gradle
-        run: ./gradlew build
+        run: ./gradlew build -Dtoolchain=${{ matrix.toolchain }}
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v3

build.gradle.kts

@@ -37,6 +37,9 @@ println( "----------------------------------------------------------------------
 println( "FlatLaf Version: ${version}" )
 println( "Gradle ${gradle.gradleVersion} at ${gradle.gradleHomeDir}" )
 println( "Java ${System.getProperty( "java.version" )}" )
+val toolchainJavaVersion = System.getProperty( "toolchain" )
+if( !toolchainJavaVersion.isNullOrEmpty() )
+	println( "Java toolchain ${toolchainJavaVersion}" )
 println()
 
 

buildSrc/src/main/kotlin/flatlaf-toolchain.gradle.kts

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2022 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+plugins {
+	java
+}
+
+val toolchainJavaVersion = System.getProperty( "toolchain" )
+if( !toolchainJavaVersion.isNullOrEmpty() ) {
+	java.toolchain {
+		languageVersion.set( JavaLanguageVersion.of( toolchainJavaVersion ) )
+	}
+}

flatlaf-core/build.gradle.kts

@@ -16,6 +16,7 @@
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-java9`
 	`flatlaf-publish`

flatlaf-demo/build.gradle.kts

@@ -16,6 +16,7 @@
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 }
 
 dependencies {

flatlaf-extras/build.gradle.kts

@@ -16,6 +16,7 @@
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-publish`
 }

flatlaf-intellij-themes/build.gradle.kts

@@ -16,6 +16,7 @@
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-publish`
 }

flatlaf-jide-oss/build.gradle.kts

@@ -16,6 +16,7 @@
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-publish`
 }
 

flatlaf-natives/flatlaf-natives-jna/build.gradle.kts

@@ -16,6 +16,7 @@
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 }
 
 dependencies {

flatlaf-swingx/build.gradle.kts

@@ -16,6 +16,7 @@
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 	`flatlaf-module-info`
 	`flatlaf-publish`
 }

flatlaf-testing/build.gradle.kts

@@ -18,6 +18,7 @@ import java.util.Properties
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 }
 
 dependencies {

flatlaf-theme-editor/build.gradle.kts

@@ -16,6 +16,7 @@
 
 plugins {
 	`java-library`
+	`flatlaf-toolchain`
 }
 
 dependencies {