gradle: add native-image plugin

Author: pjonsson

build.gradle

@@ -1,5 +1,7 @@
+// sudo apt install libfreetype-dev
 plugins {
-    id 'application'
+  id 'application'
+  id 'org.graalvm.buildtools.native' version '0.9.26'
 }
 
 group = 'org.contikios.cooja'
@@ -70,6 +72,26 @@ application {
     '--enable-preview', '--enable-native-access', 'ALL-UNNAMED']
 }
 
+graalvmNative {
+  binaries {
+    main {
+      javaLauncher = javaToolchains.launcherFor {
+        languageVersion = JavaLanguageVersion.of(javaVersion)
+        vendor = JvmVendorSpec.matching("Oracle Corporation")
+      }
+      fallback = true
+      useFatJar = true
+      buildArgs.add('--enable-preview')
+      buildArgs.add('--report-unsupported-elements-at-runtime')
+    }
+  }
+}
+
+tasks.named("nativeCompile") {
+  dependsOn fullJar
+  classpathJar = layout.buildDirectory.file("libs/cooja-full.jar")
+}
+
 tasks.withType(JavaCompile).configureEach {
   options.compilerArgs += ['--enable-preview',
                            "-Aproject=${project.group}/${project.name}"]

settings.gradle

@@ -1,3 +1,9 @@
+pluginManagement {
+  repositories {
+    mavenCentral()
+    gradlePluginPortal()
+  }
+}
 plugins {
     id 'org.gradle.toolchains.foojay-resolver-convention' version '0.7.0'
 }