Upgrade gradle build

This commit upgrades the gradle build so that
- Java 21 is used in the build chain
- Upgrade graalvm plugin
- Use Oracle as Java vendor
- Add toolchain resolver to automatically download requires Java runtime
- Bump Gradle 8.10

Signed-off-by: Paolo Di Tommaso <paolo.ditommaso@gmail.com>

build.gradle

@@ -3,7 +3,7 @@ plugins {
     id 'application'
     id 'jacoco'
     id 'org.cadixdev.licenser' version '0.6.1'
-    id 'org.graalvm.buildtools.native'
+    id 'org.graalvm.buildtools.native' version '0.10.2'
     id 'com.github.johnrengelman.shadow' version '7.1.2'
 }
 
@@ -67,6 +67,12 @@ task buildInfo {
     }
 }
 
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
 compileJava {
     sourceCompatibility = JavaVersion.toVersion("11")
     targetCompatibility = JavaVersion.toVersion("11")
@@ -93,6 +99,7 @@ test {
 }
 
 graalvmNative {
+    toolchainDetection = true
     binaries {
         main {
             imageName = 'tw'
@@ -109,14 +116,14 @@ graalvmNative {
             buildArgs.add('-H:+ReportExceptionStackTraces')
 
             javaLauncher = javaToolchains.launcherFor {
-                languageVersion = JavaLanguageVersion.of(17)
+                languageVersion = JavaLanguageVersion.of(21)
+                vendor = JvmVendorSpec.matching("Oracle Corporation")
             }
 
         }
 
         test {
             verbose = true
-            agent = false
         }
     }
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle

@@ -17,4 +17,11 @@ pluginManagement {
     }
 }
 
+plugins {
+    // required to download the toolchain (jdk) from a remote repository
+    // https://github.com/gradle/foojay-toolchains
+    // https://docs.gradle.org/current/userguide/toolchains.html#sub:download_repositories
+    id("org.gradle.toolchains.foojay-resolver-convention") version "0.7.0"
+}
+
 rootProject.name = 'tower-cli'