Gradle custom plugin : add dependency from extension object

Question

I\'m trying to write a plugin which adds dependencies to project.dependencies according to informations gathered in the plugin extension object. But it seems to be

Answer 1

Update: I managed to figure this out since my original answer. The way do this is to add a DependencyResolutionListener in which you add the dependencies and then remove the listener so it doesn't try to add them on later resolution steps.

compileDeps = project.getConfigurations().getByName("compile").getDependencies()
project.getGradle().addListener(new DependencyResolutionListener() {
    @Override
    void beforeResolve(ResolvableDependencies resolvableDependencies) {
        compileDeps.add(project.getDependencies().create("org.foo:bar:$version"))
        project.getGradle().removeListener(this)
    }

    @Override
    void afterResolve(ResolvableDependencies resolvableDependencies) {}
})

I have a working example of a plugin that uses this here

Original Answer:

This is also late but for anyone dropping in. With the latest gradle (2.6 at the time of writing), you can add a DependencyResolutionListener and add any dependencies before dependencies are resolved.

project.getGradle().addListener(new DependencyResolutionListener() {
    @Override
    void beforeResolve(ResolvableDependencies resolvableDependencies) {
        depsToAdd.each { dep ->
            compileConfig.getDependencies()
                .add(project.getDependencies().create(dep))
        }
    }

    @Override
    void afterResolve(ResolvableDependencies resolvableDependencies) {

    }
})

However, as of this writing I was having some issues getting this to work with Android Studio IDE. The problem is tracked in my question here