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Copyright (c) 2014 Takari, Inc. All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
 
 package io.takari.maven.plugins;
 
 import java.io.File;
 import java.net.URI;
 

Author(s):
Jason van Zyl
@Mojo(name = "wrapper", requiresProject = true, aggregator = true)
public class WrapperMojo extends AbstractMojo {
  @Parameter(defaultValue = "${session}", readonly = true)
  private MavenSession session;
  @Parameter(defaultValue = "0.1.2", property = "version")
  private String version;
  
  public void execute() throws MojoExecutionExceptionMojoFailureException {
    //
    // Fetch the latest wrapper archive
    // Unpack it in the current working project
    // Possibly interpolate the latest version of Maven in the wrapper properties
    //
    File localRepository = new File(System.getProperty("user.home"), ".m2/repository");
    String artifactPath = String.format("io/takari/maven-wrapper/%s/maven-wrapper-%s.tar.gz");
    String wrapperUrl = String.format("http://repo1.maven.org/maven2/%s"artifactPath);    
    File destination = new File(localRepositoryartifactPath);
    Downloader downloader = new DefaultDownloader("mvnw");
    try {
      downloader.download(new URI(wrapperUrl), destination);     
      UnArchiver unarchiver = UnArchiver.builder().useRoot(false).build();
      unarchiver.unarchive(destinationnew File(.getExecutionRootDirectory()));
    } catch (Exception e) {
      throw new MojoExecutionException("Error fetching maven-wrapper archive."e);
    }
  }
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