Xcode: persist path to iPhone simulator on file system

I'm running some debug tests via the command line and I'd like Xcode to persist the path to the iPhone simulator on the file system.

Here's how I'd like it to work.

1. run the app in Xcode


2. a shell script (perhaps in the Build Phase?) would then write data to ~/Developer/myAppPersistedPath.txt


3. then run my command line tests which would then read this persisted path

Is this possible and, if so, how?