If you ever integrate Firebase, it needs GoogleService-Info.plist file as configuration.
What if you have multiple target or scheme that targeting on multiple Firebase project?
If target is your only factor to Firebase project, it's simple, download multiple GoogleService-Info.plist, place it into actual folder (not Xcode group) and set target membership correct at file inspector.
Without rename, run script, that's it.
For me, I build debug and production with two targeting market as my app variants. 4 possible configurations.
Automate corresponding GoogleService-Info.plist process is essential.
Here's my simplified Run Script Phase, take a look: