How to replace ArtifactResolver with Maven 3 equivalent (RepositorySystem)?

[Dawid Weiss <da...@gmail.com>]

Hi there,

I've been eyeballing various bits and snippets of Maven for a few
hours but I can't see any pattern of right usage for resolving
transitive dependencies of an artifact at runtime (from a plugin). I
would like to require Maven 3, so I'm interested in Maven 3's
infrastructure for basically doing what surefire does in
AbstractSureFireMojo#resolveArtifact -- it uses ArtifactResolver to
look up dependencies of a given Artifact.

Now, I've tried to do the same with RepositorySystem#resolve, but it
fails to locate certain projects (in particular when launched via m2e,
when the projects are not yet installed in a local repository, but
available from their current Workspace locations).

The pattern of use is nearly identical, for ArtifactResolver (which
works for me):

      ArtifactResolutionResult resolveTransitively =
resolver.resolveTransitively(
          Collections.singleton( artifact ),
          originatingArtifact,
          session.getLocalRepository(),
          project.getPluginArtifactRepositories(), metadataSource,
          filter );

the same with RepositorySystem does not work:

    ArtifactResolutionRequest request = new ArtifactResolutionRequest();
    request.setResolveTransitively(true);
    request.setResolutionFilter(filter);
    request.setArtifact(originatingArtifact);
    request.setArtifactDependencies(Sets.newHashSet(artifact));
    request.setLocalRepository(session.getLocalRepository());
    request.setRemoteRepositories(project.getPluginArtifactRepositories());
    ArtifactResolutionResult result2 = repositorySystem.resolve(request);

I get the exception saying:

java.lang.RuntimeException: Could not resolve:
[gid]:[aid]:jar:0.0.5-SNAPSHOT:compile

What is the "proper" way to lookup arbitrary artifact dependencies
from a plugin so that it can see transitive, reactor dependencies and
everything else?

I would gladly accept a RTFM with a pointer to where I can find
snippets of code that do it (but for Maven 3.x). Thanks,

Dawid

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