On new build system, build failed for archive because of Multiple commands produce

[roothybrid7]

[READ] Step 1: Are you in the right place?

Yes.

[REQUIRED] Step 2: Describe your environment

• Xcode version: 10.1 (10B61)
• Firebase SDK version: 5.13.0
• Firebase Component: Performance
• Component version: 2.2.1

same as #2165

[REQUIRED] Step 3: Describe the problem

following log when building for archive:

error: Multiple commands produce '/Users/foo/.ghq/github.com/org/ios/DerivedData/App/Build/Intermediates.noindex/ArchiveIntermediates/App/IntermediateBuildFilesPath/UninstalledProducts/iphoneos/GoogleUtilities.framework':
1) Target 'GoogleUtilities-ac14cd06' has create directory command with output '/Users/foo/.ghq/github.com/org/ios/DerivedData/App/Build/Intermediates.noindex/ArchiveIntermediates/App/IntermediateBuildFilesPath/UninstalledProducts/iphoneos/GoogleUtilities.framework'
2) Target 'GoogleUtilities-00567490' has create directory command with output '/Users/foo/.ghq/github.com/org/ios/DerivedData/App/Build/Intermediates.noindex/ArchiveIntermediates/App/IntermediateBuildFilesPath/UninstalledProducts/iphoneos/GoogleUtilities.framework'

Steps to reproduce:

To run archive on new build system with the environment of #2165.

[paulb777]

Remove pod 'Firebase' from the app extension target.

This is likely an instance of the CocoaPods issue - CocoaPods/CocoaPods#8206. Workarounds include using the old build system or making sure that requested subspecs match between extension and main targets.

However, to take a step back, I don't know of a reason to include pod 'Firebase' in an app extension target, so I recommend removing it and avoiding the CocoaPods bug completely.

[aceisScope]

In our case, this issue can be solved by removing Firebase from the pod subspec of the unit test target. But then it complains "fail to find Firebase module", the solution of which is described in issue #16.

[morganchen12]

Closing this since it's not actionable here.