title: Is it possible to export user defined XCode build settings to environment variables
body: <p>I have made a few build settings for various configurations, e.g.</p>
  
  <p><img src="https://i.stack.imgur.com/yzvu3.png" alt="Build settings"> e.g.</p>
  
  <p>I can access them in various files (e.g. the info.plist) like so:</p>
  
  <pre><code>${MYTESTSETTING}
  </code></pre>
  
  <p>However is it possible to get the value in the command line enviroment? e.g. after a xcodebuild from Jenkins</p>
  
  <p>I have tried </p>
  
  <pre><code>echo ${MYTESTSETTING}
  </code></pre>
  
  <p>And</p>
  
  <pre><code>echo $MYTESTSETTING
  </code></pre>