List udids found in an IPA file, without extracting the whole archive.
Works by searching for embedded.mobileprovision file(s) and selectively extracting them and printing a sorted, unique list of UDIDs.
Put the script somewhere in your PATH, or just run it directly.
listudids /path/to/build.ipa
-all will show a bit of extra information about where things were found.
listudids /path/to/build.ipa -all