从Gradle中的Groovy闭包返回价值的更好方法

Question

The below code works. It gets a collection of all the different task groups in Gradle and prints them out. I was hoping there was a better way to do this. Part of the problem is the only way I can access all tasks is via the all() method which has this signature void all(Closure var1); which is very frustrating because of just returning a collection, I get a closure that can iterate over the collection.

afterEvaluate { Project project ->
    def blah = []
    project.tasks.all { Object object ->
        blah << object.group
    }
    println blah.unique()
}

I was hoping there was a better way to do this than stashing values in a variable defined outside the closure. The primary problem here is that as the closure runs I only have access to one group name at a time, and I want to unique them, and I can't return anything from the all function because the return type is void.

Answer 1

As project.tasks is a collection, have you tried something like

afterEvaluate { Project project ->
    println project.tasks.collect { it.group }.unique()
}