core-it-support/core-it-plugins/maven-it-plugin-no-project/src/main/java/org/apache/maven/plugin/coreit/NoProjectMojo.java

package org.apache.maven.plugin.coreit;

/*
 * 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.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

/**
 * Mojo which touches a file without requiring a project.
 * 
 * @goal light-touch
 * @requiresProject false
 * 
 */
public class NoProjectMojo
    extends AbstractMojo
{
    /**
     * @parameter default-value="${project.build.directory}"
     * @required
     */
    private String outputDirectory;

    /**
     * @parameter default-value="target/test-basedir-alignment"
     */
    private File basedirAlignmentDirectory;

    public void execute()
        throws MojoExecutionException
    {
        touch( new File( outputDirectory ), "touch.txt" );
    }

    private void touch( File dir, String file )
        throws MojoExecutionException
    {
        try
        {
             if ( !dir.exists() )
             {
                 dir.mkdirs();
             }
             
             File touch = new File( dir, file );
             
             getLog().info( "Touching: " + touch );
     
             try ( FileWriter w = new FileWriter( touch ) )
             {
                 w.write( file );
             }
        }
        catch ( IOException e )
        {
            throw new MojoExecutionException( "Error touching file", e );
        }
    }
}