Take Maps API key out version control and get a new key

[nickmeinhold]

eg. https://medium.com/ios-os-x-development/keeping-secrets-out-of-git-in-your-ios-app-c01a357e824b

• the first solution is not that secure but the 2nd solution is (possibly) more secure but still insecure

Let's go with the first option but restrict the key as much as possible
https://developers.google.com/maps/documentation/ios-sdk/get-api-key#restrict_key

[nickmeinhold]

I found a much better option: cocoapods-keys

However after following the instructions I was getting the following on pod install:

Error loading the plugin `cocoapods-keys-2.1.0`.
SystemExit - ERROR: Can't find header dir for ruby. Exiting...

I tried updating Ruby as described here but for me the problem was still there.

According to this comment the cause is that Xcode 11 ships the macOS 10.15 SDK which includes headers for ruby2.6, but not for macOS 10.14's ruby2.3. I followed the instructions there and it worked.

Specifically:

SDKROOT=/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/
export SDKROOT