Mojo to print snapshot revisions

PrintSnapshotImplMojo.java

package com.liveramp.liveramp_build_maven_plugin;

import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.jar.Attributes;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import java.util.zip.ZipEntry;

import com.google.common.collect.Maps;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
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.plugins.annotations.ResolutionScope;
import org.apache.maven.project.MavenProject;

@Mojo(name = "print-snapshot-impl",
    defaultPhase = LifecyclePhase.COMPILE,
    requiresDependencyResolution = ResolutionScope.COMPILE)

public class PrintSnapshotImplMojo extends AbstractMojo {

  @Parameter(defaultValue = "${project}", required = true, readonly = true)
  private MavenProject project;

  public void execute() throws MojoExecutionException {

    try {

      Set<Artifact> artifacts = project.getArtifacts();

      getLog().info("");
      getLog().info("Implementation-Build of snapshot dependencies:");
      getLog().info("");

      TreeMap<String, String> orderedArtifacts = Maps.newTreeMap();

      for (Artifact artifact : artifacts) {

        DefaultArtifactVersion version = new DefaultArtifactVersion(artifact.getBaseVersion());

        if (version.getQualifier() != null &&
            artifact.getFile() != null &&
            version.getQualifier().equals("SNAPSHOT")) {

          JarFile jar = new JarFile(artifact.getFile());
          ZipEntry entry = jar.getEntry("META-INF/MANIFEST.MF");
          Manifest manifest = new Manifest(jar.getInputStream(entry));
          Attributes attributes = manifest.getMainAttributes();

          String title = attributes.getValue("Implementation-Title");
          String build = attributes.getValue("Implementation-Build");

          if (title != null && build != null) {
            orderedArtifacts.put(
                artifact.getGroupId() + "." + artifact.getArtifactId() + ":" + version.toString(),
                build
            );

          }
        }
      }

      for (Map.Entry<String, String> entry : orderedArtifacts.entrySet()) {
        getLog().info(entry.getKey() + ":\t" + entry.getValue());
      }

      getLog().info("");

    } catch (Exception ex) {
      throw new RuntimeException(ex);
    }
  }
}