Issue on the CocoaPods repo, issue on the Tweaks repo.
I experienced an unexpected behaviour using Tweaks through CocoaPods in a project with user defined build configurations:
Given a project using Tweaks through CocoaPods, with a user defined build configuration, and calling FBTweakInline at least once.
When building for the user defined build configuration.
Expected result the build process succeeds.
Actual result the build process fails during linking.
When building on a custom build configuration, meaning not the stock Debug and Release, the process fails during the linking, with this error:
Undefined symbols for architecture i386:
"__FBTweakIdentifier", referenced from: ...
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I noticed that between FBTweakEnabled.h, FBTweakInline.m, and FBTweakInlineInternal.h they use #ifs and #ifdefs based on DEBUG and FB_TWEAK_ENABLED to enable Tweaks. This made me think about the Preprocessors Macros.
I then went to check the Pods target settings and noticed that despite my custom build configuration was made by duplicating Debug, the DEBUG macro wasn't set. This is an issue already addressed by you guys.
So I added this to my Podfile:
xcodeproj "NAME.xcodeproj", { 'Beta' => :debug }Now the project builds, but only when modelling from Debug.
If I manually, or through the post_install hook, add FB_TWEAK_ENABLED=1 to my custom build configuration it builds. Even if I skip the xcodeproj set step.
But then if I set FB_TWEAK_ENABLED=0 it doesn't build anymore.
I made this demo repo to reproduce the issue. Just play around with the Podfile and the post_install hook to see it in action.
If I add Tweaks manually instead than with CocoaPods it links, that's why I address the issue as a CocoaPods one. Have a look the no-cocoapods branch.