001package org.apache.maven.resolver.examples.maven;
002
003/*
004 * Licensed to the Apache Software Foundation (ASF) under one
005 * or more contributor license agreements.  See the NOTICE file
006 * distributed with this work for additional information
007 * regarding copyright ownership.  The ASF licenses this file
008 * to you under the Apache License, Version 2.0 (the
009 * "License"); you may not use this file except in compliance
010 * with the License.  You may obtain a copy of the License at
011 * 
012 *  http://www.apache.org/licenses/LICENSE-2.0
013 * 
014 * Unless required by applicable law or agreed to in writing,
015 * software distributed under the License is distributed on an
016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
017 * KIND, either express or implied.  See the License for the
018 * specific language governing permissions and limitations
019 * under the License.
020 */
021
022import java.util.List;
023
024import org.apache.maven.plugin.AbstractMojo;
025import org.apache.maven.plugin.MojoExecutionException;
026import org.apache.maven.plugin.MojoFailureException;
027import org.apache.maven.plugins.annotations.Component;
028import org.apache.maven.plugins.annotations.Mojo;
029import org.apache.maven.plugins.annotations.Parameter;
030import org.eclipse.aether.RepositorySystem;
031import org.eclipse.aether.RepositorySystemSession;
032import org.eclipse.aether.artifact.Artifact;
033import org.eclipse.aether.artifact.DefaultArtifact;
034import org.eclipse.aether.repository.RemoteRepository;
035import org.eclipse.aether.resolution.ArtifactRequest;
036import org.eclipse.aether.resolution.ArtifactResolutionException;
037import org.eclipse.aether.resolution.ArtifactResult;
038import org.slf4j.Logger;
039import org.slf4j.LoggerFactory;
040
041/**
042 * Resolves a single artifact (not including its transitive dependencies).
043 */
044@Mojo( name = "resolve-artifact", threadSafe = true )
045public class ResolveArtifactMojo
046    extends AbstractMojo
047{
048    private static final Logger LOGGER = LoggerFactory.getLogger( ResolveArtifactMojo.class );
049    /**
050     * The entry point to Maven Artifact Resolver, i.e. the component doing all the work.
051     */
052    @Component
053    private RepositorySystem repoSystem;
054
055    /**
056     * The current repository/network configuration of Maven.
057     */
058    @Parameter( defaultValue = "${repositorySystemSession}", readonly = true )
059    private RepositorySystemSession repoSession;
060
061    /**
062     * The project's remote repositories to use for the resolution.
063     */
064    @Parameter( defaultValue = "${project.remotePluginRepositories}", readonly = true )
065    private List<RemoteRepository> remoteRepos;
066
067    /**
068     * The {@code <groupId>:<artifactId>[:<extension>[:<classifier>]]:<version>} of the artifact to resolve.
069     */
070    @Parameter ( property = "resolver.artifactCoords", readonly = true )
071    private String artifactCoords;
072
073    /**
074     * The actual execution of the mojo.
075     */
076    public void execute()
077        throws MojoExecutionException, MojoFailureException
078    {
079        Artifact artifact;
080        try
081        {
082            artifact = new DefaultArtifact( artifactCoords );
083        }
084        catch ( IllegalArgumentException e )
085        {
086            throw new MojoFailureException( e.getMessage(), e );
087        }
088
089        ArtifactRequest request = new ArtifactRequest();
090        request.setArtifact( artifact );
091        request.setRepositories( remoteRepos );
092
093        LOGGER.info( "Resolving artifact {} from {}", artifact, remoteRepos );
094
095        ArtifactResult result;
096        try
097        {
098            result = repoSystem.resolveArtifact( repoSession, request );
099        }
100        catch ( ArtifactResolutionException e )
101        {
102            throw new MojoExecutionException( e.getMessage(), e );
103        }
104
105        LOGGER.info( "Resolved artifact {} to {} from {}", artifact, result.getArtifact().getFile(),
106                result.getRepository() );
107    }
108
109}