src/main/java/org/apache/maven/plugins/repository/BundleCreateMojo.java

package org.apache.maven.plugins.repository;

/*
 * Copyright 2001-2005 The Apache Software Foundation.
 *
 * Licensed 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 java.io.File;

import org.apache.maven.artifact.handler.manager.ArtifactHandlerManager;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.archiver.jar.JarArchiver;
import org.codehaus.plexus.util.StringUtils;

/**
 * Goal which touches a timestamp file.
 *
 * @goal bundle-create
 * @execute phase="package"
 * 
 */
public class BundleCreateMojo
    extends AbstractMojo
{
    public static final String POM = "pom.xml";

    public static final String LICENSE = "LICENSE.txt";

    /**
     * @parameter expression="${basedir}"
     */
    private String basedir;

    /**
     * @parameter expression="${project}"
     */
    private MavenProject project;

    /**
     * @parameter expression="${component.org.codehaus.plexus.archiver.Archiver#jar}"
     */
    private JarArchiver jarArchiver;

    /**
     * @parameter expression="${component.org.apache.maven.artifact.handler.manager.ArtifactHandlerManager}"
     */
    private ArtifactHandlerManager artifactHandlerManager;

    public void execute()
        throws MojoExecutionException
    {
        // ----------------------------------------------------------------------
        // Make sure we have a packaging != pom
        // ----------------------------------------------------------------------

        if ( project.getPackaging().equals( "pom" ) )
        {
            throw new MojoExecutionException( "Packaging cannot be POM when creating an upload bundle." );
        }

        // ----------------------------------------------------------------------
        // Check the mandatory elements of the POM
        //
        // groupId
        // artifactId
        // packaging
        // name
        // version
        // url
        // scm url
        // description
        // dependencies
        // ----------------------------------------------------------------------

        validate( project.getName(), "project.name" );

        validate( project.getUrl(), "project.url" );

        if ( project.getScm() == null )
        {
            throw new MojoExecutionException( "Project scm element is null." );
        }

        validate( project.getScm().getConnection(), "project.scm.connection" );

        validate( project.getDescription(), "project.description" );

        // ----------------------------------------------------------------------
        //
        // ----------------------------------------------------------------------

        File pom = new File( basedir, POM );

        File license = new File( basedir, LICENSE );

        if ( !license.exists() )
        {
            throw new MojoExecutionException( LICENSE + " file is missing. Cannot create upload bundle." );
        }

        String finalName = project.getBuild().getFinalName();

        String outputDirectory = project.getBuild().getDirectory();

        String extension = artifactHandlerManager.getArtifactHandler( project.getPackaging() ).getExtension();

        File artifact = new File( outputDirectory, finalName + "." + extension );

        File sourceArtifact = new File( outputDirectory, finalName + "-sources." + extension );

        File bundle = new File( outputDirectory, finalName + "-bundle.jar" );

        try
        {
            jarArchiver.addFile( pom, POM );

            jarArchiver.addFile( license, LICENSE );

            jarArchiver.addFile( artifact, artifact.getName() );

            if ( sourceArtifact.exists() )
            {
                jarArchiver.addFile( sourceArtifact, sourceArtifact.getName() );
            }
            else
            {
                getLog()
                    .warn(
                           "Sources not included in upload bundle. In order to add sources please run \"mvn source:jar repository:bundle-create\"" );
            }

            jarArchiver.setDestFile( bundle );

            jarArchiver.createArchive();
        }
        catch ( Exception e )
        {
            e.printStackTrace();

            throw new MojoExecutionException( "Error creating upload bundle archive." );
        }
    }

    private void validate( String data, String expression )
        throws MojoExecutionException
    {
        if ( StringUtils.isEmpty( data ) )
        {
            throw new MojoExecutionException( expression + " must be present." );
        }
    }
}