Can gradle extensions handle lazy evaluation of a property?

Question

I\'m writing a custom gradle plugin to handle some vaguely complicated work and I have run into a frustrating problem while using properties to configure some of the tasks that

Answer 1

EDIT

The below answer is now outdated. Since I provided it a better mechanism than convention mappings has been introduced for doing this called lazy properties.

---

The usual solution for this problem is to use convention mapping:

class MyPlugin implements Plugin {
    void apply(Project project) {
       project.extensions.create('myPluginProps', MyPluginExtension)

        project.task(type: MyTask, 'thisTaskWorksIncorrectly') {
            conventionMapping.input = { project.myPluginProps.message }
        }
    }
}

and then in the task:

class MyTask extends DefaultTask {
    def String input

    @TaskAction
    def action() {
        println "You gave me this: ${getInput()}"
    }

}

Please note that I explicitly used getter for input - the convention mapping won't kick in if you reference the field directly.