ios - How to access my app’s derived data folder itself?

Question

I’m in the middle of moving my iOS app’s Firebase dependency from CocoaPods to Swift Package Manager.

Firebase’s Crashlytics requires a script to be executed while the app is building (using the Run Script build phase). Back in the CocoaPods days, I used to call the script the way documented by Google: "${PODS_ROOT}/FirebaseCrashlytics/run".

After I’ve switched to SPM, Firebase files are no longer in ${PODS_ROOT}, and there’s no such variable available at all. I know the file I need is now located in the DerivedData folder, specifically it’s at ~/Library/Developer/Xcode/DerivedData/MyApp-abcde/SourcePackages/checkouts/firebase-ios-sdk/Crashlytics/run. The problem is, the MyApp-abcde folder is not easily referenced.

A Medium post I found suggested using the ${BUILD_DIR} build variable (in regard to the example above, it would resolve to <…>/MyApp-abcde/Build/Products), and calling the dirname command to move up the directory hierarchy.

This hack worked only for running the app. When I tried to archive it, ${BUILD_DIR} resolved to another path, namely <…>/MyApp-abcde/Build/Intermediates.noindex/ArchiveIntermediates/MyApp/BuildProductsPath. I tried a few more build variables, such as ${SYMROOT}, in place of ${BUILD_DIR}, but they also produce different paths depending on the operation.

So, here comes the question…

Is there a way to reliably reference my app’s derived data folder’s root (i.e. ~/Library/Developer/Xcode/DerivedData/MyApp-abcde) using Xcode’s build variables?

question from:https://stackoverflow.com/questions/65917373/how-to-run-a-build-phase-script-located-inside-a-swift-package

Answer 1

You were close. This should work:

${BUILD_DIR%Build/*}SourcePackages/checkouts/firebase-ios-sdk/Crashlytics/run