Adding an Xcode subproject: Shouldn't all the source files get copied?
<p>I am manually adding the <a href="https://github.com/stephencelis/SQLite.swift" rel="nofollow noreferrer">SQLite.swift</a> subproject to my project. As the directions indicated, I copied the .xcodeproj file to my project. This allows me see all the source files (unlike <a href="https://stackoverflow.com/q/5784561/3681880">this SO question</a>).</p>

<p><a href="https://i.stack.imgur.com/yzdgw.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yzdgw.png" alt="enter image description here"></a></p>

<p>Everything seemed like it was working fine. However, I discovered that the source files of that subproject were not copied to my project. They are still in original location where I downloaded them. Is this by design? What if I want to share my project source code with other people in the future? They won't have the subproject source that is necessary for my project to work.</p>

<p>If I do need to copy the subproject source to my project, then how do I do that?</p>