title: Creating Assets.car file through command line for app resigning
body: <p>My app is white labeled by building a generic app and then resigning the app bundle with new images. Before <code>iOS11</code> I could achieve this by switching in new images into the bundle and resigning. However now that asset catalogs are required for the app icons I'm having trouble creating the <code>Assets.car</code> file.</p>
  
  <p>Here is what I have tried:</p>
  
  <p>Copying <code>Images.xcassets</code> to a working directory (with a <code>build</code> directory next to it). <code>Images.xcassets</code> contains <code>AppIcons.appiconset</code> and <code>LaunchImage.launchimage</code>.</p>
  
  <p>From the command line </p>
  
  <pre><code>xcrun actool Images.xcassets --compile build --platform iphoneos --minimum-deployment-target 9.0
  </code></pre>
  
  <p>It seems to run but no file is created. </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"&gt;
  &lt;plist version="1.0"&gt;
  &lt;dict&gt;
      &lt;key&gt;com.apple.actool.compilation-results&lt;/key&gt;
      &lt;dict&gt;
          &lt;key&gt;output-files&lt;/key&gt;
          &lt;array/&gt;
      &lt;/dict&gt;
  &lt;/dict&gt;
  &lt;/plist&gt;
  </code></pre>
  
  <p>I hope I'm missing something obvious.</p>