How can I set the compileOptions for my Gradle Java plugin?

I want to set the -parameters command on my gradle build so that I can use reflection to access the name of the parameters. It seems like I should be doing this with the following closure.

compileJava {
    compileOptions {
        compilerArgs << '-parameters'
    }
}

But compileOptions is listed as read-only, and when I look at the source code there’s no setter.

https://gradle.org/docs/current/dsl/org.gradle.api.tasks.compile.JavaCompile.html#org.gradle.api.tasks.compile.JavaCompile:options

How am I suppose to be able to tell the javac compiler what args to use in Gradle?

Groovy:       2.3.6
Ant:          Apache Ant(TM) version 1.9.3 compiled on December 23 2013
JVM:          1.8.0_40 (Oracle Corporation 25.40-b25)
OS:           Windows 7 6.1 amd64

Answer

Please try:

apply plugin: 'java'

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