How to pass -parameters javac flag to Java compiler via Gradle?

Question

I have a Gradle-managed multi-project setup that relies on the new Java 8 -parameters compiler flag. I need 2 ways of including the compiler flag:

• To test classes only (the main project should compile without parameter names attached).
• To all compiled sources.

I've tried this:

  tasks.withType(JavaCompile) {
    options.compilerArgs << '-parameters'
    options.fork = true
    options.forkOptions.executable = 'javac'
  }

...but it does not seem to be working properly.

Solution 1

You should use standard way of configuring Java compile plugin:

apply plugin: 'java'

compileJava {
    options.compilerArgs << '-parameters'
}

Solution 2

For Android projects, one can add e.g. the below in the gradle android scope.

// Used to get more info from dagger regarding binding compile errors
// see https://github.com/google/dagger/wiki/Dagger-2.17-@Binds-bugs
tasks.withType(JavaCompile) {
    options.compilerArgs += ["-Adagger.floatingBindsMethods=enabled"]
}