title: How to find swift version in a programmical way?
body: <p>I am trying to find answer for this question: given <strong>1,000,000</strong> Xcode projects, is there a way to find out what's the swift version, 2.3 or 3.0?</p>
  
  <p>(I definitely know how to check version of <strong>1</strong> project. What I am looking for is a programmical way to check many projects.)</p>
  
  <p>Then I believe the answer to this question might be helpful: How does Xcode identify swift code version?</p>
  
  <p>Is there a file, like JSON, stores all the information but hidden from the users? How can I find this file?</p>