如何在 org.apache.maven.AbstractMavenLifecycleParticipant 中使用 Aether

Question

我按照这个示例将所需的依赖项注入到我的 AbtractMavenLifecyleParticipant 中：

• http://www.sonatype.com/people/2011/01/how-to-use-aether-in-maven-plugins/

• http://maven.apache.org/examples/maven-3-lifecycle-extensions.html

“afterProjectsRead”被完美调用，但 repoSystem、repoSession 和 remoteRepos 始终为“null”。

如何从 AbstractMavenLifecyleParticipant 中获取这些对象？

import org.apache.maven.AbstractMavenLifecycleParticipant;
import org.apache.maven.MavenExecutionException;
import org.apache.maven.execution.MavenSession;
import org.codehaus.plexus.component.annotations.Component;
import org.sonatype.aether.RepositorySystem;
import org.sonatype.aether.RepositorySystemSession;
import org.sonatype.aether.repository.RemoteRepository;

@Component(role = AbstractMavenLifecycleParticipant.class, hint = "skipper")
public class ModuleSkipperLifecycleParticipant extends AbstractMavenLifecycleParticipant {

    /**
     * @component
     */
    private RepositorySystem repoSystem;

    /**
     * @parameter default-value="${repositorySystemSession}"
     * @readonly
     */
    private RepositorySystemSession repoSession;

    /**
     * @parameter default-value="${project.remotePluginRepositories}"
     * @readonly
     */
    private List<RemoteRepository> remoteRepos;

    @Override
    public void afterProjectsRead(MavenSession session) throws MavenExecutionException {
        super.afterProjectsRead(session);

        System.out.println("repoSession: " + repoSession);
        System.out.println("repoSystem: " + repoSystem);
        System.out.println("remoteRepos: " + remoteRepos);

    }
}

Answer 1

这就是我们在jcabi-aether 中的做法：

final File repo = this.session.getLocalRepository().getBasedir();
final Collection<Artifact> deps = new Aether(this.getProject(), repo).resolve(
  new DefaultArtifact("junit", "junit-dep", "", "jar", "4.10"),
  JavaScopes.RUNTIME
);

也许您可以只使用该库，而不是自己编写它..