Xcode 7.3 changes location of Coverage.profdata

[raven]

Xcode 7.2 would place Coverage.profdata within
#{build_directory}/**/CodeCoverage/#{self.scheme}/

However in 7.3, Coverage.profdata doesn't get nested within a directory matching the scheme name.
#{build_directory}/**/CodeCoverage/

[neonichu]

Can't actually repro slather not finding the profdata files with 7.3 beta 2. However, coverage information is also not computed correctly for me.

I'm descoping this from 2.0.0 since it needs more investigation and 7.3 is still in beta.

[manuyavuz]

Seems like in Xcode 7.3 (I'm using beta 4 now), Coverage.profdata file inside Build/Intermediates/CodeCoverage/ folder is being overwritten by the last run in the Xcode regardless of the scheme to be tested. In Xcode 7.2, all schemes were having different Coverage.profdata files inside their corresponding subdirectory Build/Intermediates/CodeCoverage/#{scheme_name}.

This causes both --scheme option and the default scenario (slather finding path using .app dropped product name).

[manuyavuz]

I could make it work again by changing the following line here:

dir = Dir[File.join("#{build_directory}","/**/#{first_product_name}")].first

to below line:

dir = Dir[File.join("#{build_directory}","/**/CodeCoverage")].first

But I'm not sure how this can be changed providing backward compatibility.

[neonichu]

I think a reasonable way to deal with this could be checking the Xcode version explicitly, like

$ xcodebuild -version
Xcode 6.4

And if that is 7.3 or higher, use the new path. This wouldn't be 100% accurate, as the selected Xcode version isn't necessarily the one used to do the last run for a certain project, but since CI is the most common use case, it should be OK.

[mapedd]

TIL: there is an env var now that points to exact path of Coverage.profdata file:

CLANG_COVERAGE_PROFILE_FILE