What is "Scanning for working copies"

Question

I just "upgraded" to Lion and Xcode 4.3.2 and now it says "Scanning for working copies" in the status area in the title bar just below the project name. It started doing this after automatically downloads iOS 5.1. The progress bar sits their endlessly. What is it doing and why?

Answer 1

New Lion's auto saves and Version feature saves every file in background and create versions for letter change and therefore following this feature new Xcode can also save versions of your project using following ways

1. A snapshot saves the current state of your project.
2. Source control repositories.(directly used in xcode)
3. An archive packages your products for distribution.

When xcode starts, it scans for the working copies or loads all know version in memory so that all version can be used for edit/update etc For Lion : Follow this

For xcode: Follow this