title: how to put folder into a tar file with gradle
body: <p>I am new to gradle. 
  I want to create a filename.tar file which includes (filename.war and data/config/*.properties). The war file stays inside build/libs. The requirement is: inside tar file, we need to have folder data/config and all properties files under that folder. The war file stays in the same level with data folder.</p>
  
  <p>Here is what i have, </p>
  
  <pre><code>task tarz(type: Tar) {
   archiveName = 'filename'
   from 'build/libs','data/config'
   include '*.war','*.properties'
   destinationDir = file('build/tar')
   extension 'tar'
   compression = Compression.GZIP
  }
  </code></pre>
  
  <p>this above script is only copy properties files into tar, not the folder.
  And the name of the file is 'filename', not 'filename.tar'</p>
  
  <p>Please help me.</p>