Add maven-build-classpath to plugin execution classpath

Question

I am writing some code-gen maven-plugin.

I need my project classpath be injected in to my plugin execution classpath.

I found this article. The solution ther

Answer 1

I took this approach and apparently it's working:

1 - a MavenProject parameter is needed within your Mojo class:

@Parameter(defaultValue = "${project}", required = true, readonly = true)
private MavenProject project;

2 - and then you can get the classpath elements from project instance:

try {
    Set urls = new HashSet<>();
    List elements = project.getTestClasspathElements();
                                  //getRuntimeClasspathElements()
                                  //getCompileClasspathElements()
                                  //getSystemClasspathElements()  
    for (String element : elements) {
        urls.add(new File(element).toURI().toURL());
    }

    ClassLoader contextClassLoader = URLClassLoader.newInstance(
            urls.toArray(new URL[0]),
            Thread.currentThread().getContextClassLoader());

    Thread.currentThread().setContextClassLoader(contextClassLoader);

} catch (DependencyResolutionRequiredException e) {
    throw new RuntimeException(e);
} catch (MalformedURLException e) {
    throw new RuntimeException(e);
}