maven-plugin-plugin/src/main/java/org/apache/maven/plugin/plugin/metadata/AddPluginArtifactMetadataMojo.java

package org.apache.maven.plugin.plugin.metadata;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.GroupRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.Versioning;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.Parameter;
import org.apache.maven.project.MavenProject;

/**
 * Inject any plugin-specific
 * <a href="/ref/current/maven-repository-metadata/repository-metadata.html">artifact metadata</a> to the project's
 * artifact, for subsequent installation and deployment.
 * It is used:
 * <ol>
 * <li>to add the <code>latest</code> metadata (which is plugin-specific) for shipping alongside the plugin's
 *     artifact</li>
 * <li>to define plugin mapping in the group</li>
 * </ol>
 *
 * @see ArtifactRepositoryMetadata
 * @see GroupRepositoryMetadata
 *
 * @since 2.0
 */
@Mojo( name = "addPluginArtifactMetadata", defaultPhase = LifecyclePhase.PACKAGE, threadSafe = true )
public class AddPluginArtifactMetadataMojo
    extends AbstractMojo
{
    /**
     * The project artifact, which should have the <code>latest</code> metadata added to it.
     */
    @Parameter( defaultValue = "${project}", readonly = true )
    private MavenProject project;

    /**
     * The prefix for the plugin goal.
     */
    @Parameter
    private String goalPrefix;

    /**
     * Set this to "true" to skip invoking any goals or reports of the plugin.
     *
     * @since 2.8
     */
    @Parameter( defaultValue = "false", property = "maven.plugin.skip" )
    private boolean skip;

    /** {@inheritDoc} */
    public void execute()
        throws MojoExecutionException
    {
        if ( skip )
        {
            getLog().warn( "Execution skipped" );
            return;
        }
        Artifact projectArtifact = project.getArtifact();

        Versioning versioning = new Versioning();
        versioning.setLatest( projectArtifact.getVersion() );
        versioning.updateTimestamp();
        ArtifactRepositoryMetadata metadata = new ArtifactRepositoryMetadata( projectArtifact, versioning );
        projectArtifact.addMetadata( metadata );

        GroupRepositoryMetadata groupMetadata = new GroupRepositoryMetadata( project.getGroupId() );
        groupMetadata.addPluginMapping( getGoalPrefix(), project.getArtifactId(), project.getName() );

        projectArtifact.addMetadata( groupMetadata );
    }

    /**
     * @return the goal prefix parameter or the goal prefix from the Plugin artifactId.
     */
    private String getGoalPrefix()
    {
        if ( goalPrefix == null )
        {
            goalPrefix = PluginDescriptor.getGoalPrefixFromArtifactId( project.getArtifactId() );
        }

        return goalPrefix;
    }
}