Programmatically resolving Maven dependencies outside of a plugin - get RepositorySystemSession and RepositorySystem

Question

Maybe this is going to be a larger task than I had originally thought, but regardless, I\'m trying to load a MavenProject from a file and then resolve its depen

Answer 1

This is covered in "Aether/Setting Aether Up" for the RepositorySystem and in "Aether/Creating a Repository System Session" in the eclipse wiki.

There is not a ton of documentation, but you can create a RepositorySystem as follows:

// verbatim copy from the Setting Aether Up link
private static RepositorySystem newRepositorySystem()
{
    DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
    locator.addService( RepositoryConnectorFactory.class, BasicRepositoryConnectorFactory.class );
    locator.addService( TransporterFactory.class, FileTransporterFactory.class );
    locator.addService( TransporterFactory.class, HttpTransporterFactory.class );

    return locator.getService( RepositorySystem.class );
}

Do note that this requires the dependencies detailed in "Getting Aether", most notably maven-aether-provider.

When you have your repository system the tutorial goes on to create a RepositorySystemSession with the following factory method:

// copied verbatim from "Creating a Repository System Session"
private static RepositorySystemSession newSession( RepositorySystem system )
{
    DefaultRepositorySystemSession session = MavenRepositorySystemUtils.newSession();

    LocalRepository localRepo = new LocalRepository( "target/local-repo" );
    session.setLocalRepositoryManager( system.newLocalRepositoryManager( session, localRepo ) );

    return session;
}