title: how to start a single goal / execution in maven
body: <p>Currently I am debugging the signing of an Android app. And this would be a lot easier if I could just execute this one and only plugin:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;plugin&gt;
    &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
    &lt;artifactId&gt;maven-jarsigner-plugin&lt;/artifactId&gt;
    &lt;executions&gt;
      &lt;execution&gt;
        &lt;id&gt;signing&lt;/id&gt;
        &lt;goals&gt;
          &lt;goal&gt;sign&lt;/goal&gt;
        &lt;/goals&gt;
        &lt;phase&gt;package&lt;/phase&gt;
  </code></pre>
  
  <p>But no matter what I try all I get is:</p>
  
  <pre><code>[ERROR] Could not find goal 'signing' in plugin org.apache.maven.plugins:maven-jarsigner-plugin:1.2 among available goals verify, sign, help -&gt; [Help 1]
  org.apache.maven.plugin.MojoNotFoundException: Could not find goal 'signing' in plugin org.apache.maven.plugins:maven-jarsigner-plugin:1.2 among available goals verify,
   sign, help
  </code></pre>
  
  <p>or </p>
  
  <pre><code>org.apache.maven.lifecycle.LifecyclePhaseNotFoundException: Unknown lifecycle phase "sign". You must specify a valid lifecycle phase or a goal in the format &lt;plugin-pre
  fix&gt;:&lt;goal&gt; or &lt;plugin-group-id&gt;:&lt;plugin-artifact-id&gt;[:&lt;plugin-version&gt;]:&lt;goal&gt;. Available lifecycle phases are: validate, initialize, generate-sources, process-sources
  , generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-co
  mpile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, p
  ost-clean, pre-site, site, post-site, site-deploy.
  </code></pre>
  
  <p>or some other error. </p>