Configure an external plug-in from my own custom Java plug-in

Help/Discuss
1

Hi,

We are currently making the step to set some company-wide conventions/standards.
We would like to use them to simplify configuring our Gradle-based projects, by introducing a plug-in (written in Java), that contains these conventions and applies them to the project based on a minimal set of configuration parameters.

I’ve already managed to add one of the plugins we would like to depend on, by using:

public class MyPlugin implements Plugin<Project> {

  public void apply(Project project)
  {
    project.getPlugins().apply(ExternalPlugin.class);
  }
}

This works. I can see the tasks added by ExternalPlugin.
However, how can I configure this plugin?

For now I’m using settings.gradle to provide the input for the configuration, as I can read this while I’m in the apply() method (and the configuration I can define in build.gradle for the plug-in using Extensions, is not).
Is there a way to add and configure other plug-ins after reading the configuration based on my plugins extension?

In short: How can I configure another plug-in using an instance of Project in Java?
(How) can I do this after the configuration in build.gradle is loaded?

Hopefully someone can help me.

Thanks,
Arno

2

I’m not sure to understand your question, but the afterEvaluate hook is designed for that.

Note that the new model will allow more subtle things regarding the configuration phase

3

@Francois_Guillot That sounds about right. Will check it soon.

I currently managed to configure the plugins by either using their own provided extension and adding/extracting that from project.getExtensions() or creating a local class that represents their custom DSL within an “extension” class.

I am currently struggling to load a file I have included in my plugins resources.

URL urlForResource = project.getBuildscript().getClassLoader().getResource(resourceName);
File f = project.file(urlForResource);

The call to getResource() seems to return a perfectly fine URL for the resource within the JAR.
The call to project.file() results in a InvalidUserDataException stating that it cannot convert the URL 'jar:file:/path/to/jar!/resource.file` to a file.
Any ideas on how to load the resource from the jar and use it within the project configuration?

4

You can load the resource as a stream and then write it to a file if you really need to