Jenkinsfile get current tag : <p>Is there a way to get the current tag ( or null if there is none ) for a job in a Jenkinsfile? The background is that I only want to build some artifacts ( android APKs ) when this commit has a tag. 
I tried:</p>

<pre><code>env.TAG_NAME
</code></pre>

<p>and</p>

<pre><code>binding.variables.get("TAG_NAME")
</code></pre>

<p>both are always null - even though this ( <a href="https://issues.jenkins-ci.org/browse/JENKINS-34520" rel="noreferrer">https://issues.jenkins-ci.org/browse/JENKINS-34520</a> ) indicates otherwise </p>
