Provide errorprone options in Java-based Gradle Plugin

[assayire]

I am trying to apply errorprone from a custom plugin of mine. In other words, my plugins sets up errorprone in the host project. I am writing my plugin in Java. What would be the equivalent of this in Java?

tasks.named('compileJava') {
        options.errorprone {
            enabled = true
            allErrorsAsWarnings = false
            excludedPaths = '.*(/build/generated/).*'
            disable('InvalidParam') // False positives on records https://github.com/google/error-prone/issues/2321
        }
}

---

I tried this but says no such extension:

project.getExtensions().configure("errorprone", (Action<ErrorProneOptions>) errorProneOptions -> {
        errorProneOptions.getEnabled().set(true);
        errorProneOptions.getAllErrorsAsWarnings().set(false);
        errorProneOptions.getExcludedPaths().set(".*(/build/generated/).*");
        errorProneOptions.disable("InvalidParam");
      });

I tried this but get build error saying invalid compiler option -XepAllErrorsAsWarnings, and so on) 😫

project.getTasks().withType(JavaCompile.class, javaCompile -> {
        javaCompile
          .getOptions()
          .getCompilerArgs()
          .addAll(List.of(
            "-XepAllErrorsAsWarnings:false",
            "-XepExcludedPaths:.*(/build/generated/).*",
            "-Xep:InvalidParam:OFF"
          ));
      });

Hope there is a way to apply/configure errorprone in Java.

Thanks 🙏

Related but did not work:

• Unable to use AllErrorsAsWarnings flag in Maven google/error-prone#1226
• Unable to pass parameter to ErrorProne in Maven with JDK 11 google/error-prone#1136

[tbroyer]

The extension is on each JavaCompile task's getOptions(), which you have to cast to ExtensionAware (note also how I used withType/configureEach to avoid eager task configuration):

project.getTasks().withType(JavaCompile.class).configureEach(javaCompile ->
    ((ExtensionAware) javaCompile.getOptions()).getExtensions().configure(ErrorProneOptions.class, options -> {
        options.getEnabled().set(true); // This should be the default anyway
        options.getAllErrorsAsWarnings().set(false);
        options.getExcludedPaths().set(".*/build/generated/.*");
        options.disable("InvalidParam");
    });

[assayire]

Thanks a ton @tbroyer ... let me try that and report back.

[assayire]

Got it all working. Thanks a ton @tbroyer.