Add checkerframework and errorprone

build-logic/build-parameters/build.gradle.kts

@@ -0,0 +1,15 @@
+plugins {
+    id("org.gradlex.build-parameters") version "1.4.3"
+}
+
+buildParameters {
+    pluginId("testng.build-parameters")
+    bool("enableCheckerframework") {
+        defaultValue.set(false)
+        description.set("Run CheckerFramework (nullness) verifications")
+    }
+    bool("enableErrorprone") {
+        defaultValue.set(true)
+        description.set("Enable ErrorProne verifications")
+    }
+}

build-logic/code-quality/build.gradle.kts

@@ -11,6 +11,8 @@ repositories {
 dependencies {
     implementation("org.sonarqube:org.sonarqube.gradle.plugin:2.8")
     implementation("com.github.autostyle:autostyle-plugin-gradle:3.1")
+    implementation("org.checkerframework:checkerframework-gradle-plugin:0.6.29")
+    implementation("net.ltgt.gradle:gradle-errorprone-plugin:3.1.0")
 }
 
 tasks.withType<KotlinCompile>().configureEach {

build-logic/code-quality/src/main/kotlin/testng.checkerframework.gradle.kts

@@ -0,0 +1,25 @@
+import org.checkerframework.gradle.plugin.CheckerFrameworkExtension
+
+plugins {
+    id("org.checkerframework")
+}
+
+dependencies {
+    checkerFramework("org.checkerframework:checker:3.36.0")
+}
+
+configure<CheckerFrameworkExtension> {
+    checkers = listOf(
+        "org.checkerframework.checker.nullness.NullnessChecker",
+        "org.checkerframework.checker.optional.OptionalChecker"
+    )
+}
+
+tasks.withType<JavaCompile>().configureEach {
+    // Don't run the checker on generated code.
+    if (name.startsWith("compileMainGenerated")) {
+        checkerFramework {
+            skipCheckerFramework = true
+        }
+    }
+}

build-logic/code-quality/src/main/kotlin/testng.errorprone.gradle.kts

@@ -0,0 +1,13 @@
+import net.ltgt.gradle.errorprone.errorprone
+
+plugins {
+    id("net.ltgt.errorprone")
+}
+
+dependencies {
+    errorprone("com.google.errorprone:error_prone_core:2.20.0")
+}
+
+tasks.withType<JavaCompile>().configureEach {
+    options.errorprone.disableWarningsInGeneratedCode.set(true)
+}

build-logic/jvm/src/main/kotlin/testng.java.gradle.kts

@@ -2,6 +2,7 @@ plugins {
     `java-base`
     id("testng.versioning")
     id("testng.style")
+    // id("testng.build-parameters") // Plugin [id: 'testng.build-parameters'] was not found
     id("testng.repositories")
     // Improves Gradle Test logging
     // See https://github.com/vlsi/vlsi-release-plugins/tree/master/plugins/gradle-extensions-plugin
@@ -13,6 +14,13 @@ java {
     targetCompatibility = JavaVersion.VERSION_11
 }
 
+if (true /*buildParameters.enableCheckerframework*/) {
+    apply(plugin = "testng.checkerframework")
+}
+if (true /*buildParameters.enableErrorprone*/) {
+    apply(plugin = "testng.errorprone")
+}
+
 tasks.withType<JavaCompile>().configureEach {
     inputs.property("java.version", System.getProperty("java.version"))
     inputs.property("java.vendor", System.getProperty("java.vendor"))

build-logic/settings.gradle.kts

@@ -7,6 +7,7 @@ dependencyResolutionManagement {
 rootProject.name = "build-logic"
 
 include(":basics")
+include(":build-parameters")
 include(":code-quality")
 include(":jvm")
 include(":publishing")