Carthage fails to build Nimble: cannot import <Nimble/Nimble-Swift.h> for obj-c file for Xcode bots

Question

Summary When the build server downloads the project and tires to call carthage bootstrap/update on the project it fails to build Nimble.

Details I'll manually download the source and run the following

carthage bootstrap Quick Nimble --platform ios --cache-builds
# or 
carthage update Quick Nimble --platform ios --cache-builds

Should this occur in the ~/Projects directory all is fine and Carthage is happy.

Should I allow Xcode Bots to download and run it, it fails. So I log into the server and build out of the build directory Xcode Bots has created, which is

~/Library/Caches/XCSBuilder/Bots/8e543991f99daae3015cbc6c419dba56/Source/myProject and I get the following in the log

/***someUserDirectory***/Library/Caches/XCSBuilder/Bots/8e543991f99daae3015cbc6c419dba56/Source/airlib/Carthage/Checkouts/Nimble/Sources/NimbleObjectiveC/NMBStringify.m:6:9: fatal error: 'Nimble/Nimble-Swift.h' file not found
#import <Nimble/Nimble-Swift.h>
        ^~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

Here's the compileC command

CompileC /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Objects-normal/x86_64/NMBStringify.o /***someUserDirectory***/Library/Caches/XCSBuilder/Bots/8e543991f99daae3015cbc6c419dba56/Source/airlib/Carthage/Checkouts/Nimble/Sources/NimbleObjectiveC/NMBStringify.m normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler (in target: Nimble-iOS)
    cd /***someUserDirectory***/Library/Caches/XCSBuilder/Bots/8e543991f99daae3015cbc6c419dba56/Source/airlib/Carthage/Checkouts/Nimble
    export LANG=en_US.US-ASCII
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x objective-c -arch x86_64 -fmessage-length=0 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit=0 -std=gnu99 -fobjc-arc -fmodules -gmodules -fmodules-cache-path=/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/ModuleCache.noindex -fno-autolink -fmodules-prune-interval=86400 -fmodules-prune-after=345600 -fbuild-session-file=/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/ModuleCache.noindex/Session.modulevalidation -fmodules-validate-once-per-build-session -Wnon-modular-include-in-framework-module -Werror=non-modular-include-in-framework-module -fmodule-name=Nimble -fapplication-extension -Wno-trigraphs -fpascal-strings -Os -fno-common -Werror -Wno-missing-field-initializers -Wno-missing-prototypes -Werror=return-type -Wunreachable-code -Wno-implicit-atomic-properties -Werror=deprecated-objc-isa-usage -Wno-objc-interface-ivars -Werror=objc-root-class -Wno-arc-repeated-use-of-weak -Wimplicit-retain-self -Wduplicate-method-match -Wno-missing-braces -Wparentheses -Wswitch -Wunused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wempty-body -Wuninitialized -Wconditional-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wconstant-conversion -Wint-conversion -Wbool-conversion -Wenum-conversion -Wno-float-conversion -Wnon-literal-null-conversion -Wobjc-literal-conversion -Wshorten-64-to-32 -Wpointer-sign -Wnewline-eof -Wno-selector -Wno-strict-selector-match -Wundeclared-selector -Wdeprecated-implementations -DPRODUCT_NAME=Nimble/Nimble -DNS_BLOCK_ASSERTIONS=1 -DOBJC_OLD_DISPATCH_PROTOTYPES=0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.2.sdk -fasm-blocks -fstrict-aliasing -Wprotocol -Wdeprecated-declarations -mios-simulator-version-min=8.0 -g -Wno-sign-conversion -Winfinite-recursion -Wcomma -Wblock-capture-autoreleasing -Wstrict-prototypes -Wno-semicolon-before-method-body -fobjc-abi-version=2 -fobjc-legacy-dispatch -iquote /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Nimble-generated-files.hmap -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Nimble-own-target-headers.hmap -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Nimble-all-non-framework-target-headers.hmap -ivfsoverlay /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/all-product-headers.yaml -iquote /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Nimble-project-headers.hmap -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Products/Release-iphonesimulator/include -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/DerivedSources-normal/x86_64 -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/DerivedSources/x86_64 -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/DerivedSources -F/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Products/Release-iphonesimulator -F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks -F/Applications/Xcode.app/Contents/Developer/Library/Frameworks -MMD -MT dependencies -MF /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Objects-normal/x86_64/NMBStringify.d --serialize-diagnostics /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Objects-normal/x86_64/NMBStringify.dia -c /***someUserDirectory***/Library/Caches/XCSBuilder/Bots/8e543991f99daae3015cbc6c419dba56/Source/airlib/Carthage/Checkouts/Nimble/Sources/NimbleObjectiveC/NMBStringify.m -o /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Objects-normal/x86_64/NMBStringify.o

It also gives a similar error for the i386 version of the file. Just change all the x86_64 to i386. So there are two errors for NMBStringify file.

When I run Carthage boostrap/update in the normal projects directory, ~/Projects/myproject/ the build is fine and it prints the following for the same file

CompileC /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Objects-normal/x86_64/NMBStringify.o /***someUserDirectory***/Projects/airlib/Carthage/Checkouts/Nimble/Sources/NimbleObjectiveC/NMBStringify.m normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler (in target: Nimble-iOS)
    cd /***someUserDirectory***/Projects/airlib/Carthage/Checkouts/Nimble
    export LANG=en_US.US-ASCII
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x objective-c -arch x86_64 -fmessage-length=0 -fdiagnostics-show-note-include-stack -fmacro-backtrace-limit=0 -std=gnu99 -fobjc-arc -fmodules -gmodules -fmodules-cache-path=/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/ModuleCache.noindex -fno-autolink -fmodules-prune-interval=86400 -fmodules-prune-after=345600 -fbuild-session-file=/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/ModuleCache.noindex/Session.modulevalidation -fmodules-validate-once-per-build-session -Wnon-modular-include-in-framework-module -Werror=non-modular-include-in-framework-module -fmodule-name=Nimble -fapplication-extension -Wno-trigraphs -fpascal-strings -Os -fno-common -Werror -Wno-missing-field-initializers -Wno-missing-prototypes -Werror=return-type -Wunreachable-code -Wno-implicit-atomic-properties -Werror=deprecated-objc-isa-usage -Wno-objc-interface-ivars -Werror=objc-root-class -Wno-arc-repeated-use-of-weak -Wimplicit-retain-self -Wduplicate-method-match -Wno-missing-braces -Wparentheses -Wswitch -Wunused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wempty-body -Wuninitialized -Wconditional-uninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wconstant-conversion -Wint-conversion -Wbool-conversion -Wenum-conversion -Wno-float-conversion -Wnon-literal-null-conversion -Wobjc-literal-conversion -Wshorten-64-to-32 -Wpointer-sign -Wnewline-eof -Wno-selector -Wno-strict-selector-match -Wundeclared-selector -Wdeprecated-implementations -DPRODUCT_NAME=Nimble/Nimble -DNS_BLOCK_ASSERTIONS=1 -DOBJC_OLD_DISPATCH_PROTOTYPES=0 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator12.2.sdk -fasm-blocks -fstrict-aliasing -Wprotocol -Wdeprecated-declarations -mios-simulator-version-min=8.0 -g -Wno-sign-conversion -Winfinite-recursion -Wcomma -Wblock-capture-autoreleasing -Wstrict-prototypes -Wno-semicolon-before-method-body -fobjc-abi-version=2 -fobjc-legacy-dispatch -iquote /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Nimble-generated-files.hmap -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Nimble-own-target-headers.hmap -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Nimble-all-non-framework-target-headers.hmap -ivfsoverlay /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/all-product-headers.yaml -iquote /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Nimble-project-headers.hmap -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Products/Release-iphonesimulator/include -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/DerivedSources-normal/x86_64 -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/DerivedSources/x86_64 -I/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/DerivedSources -F/***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Products/Release-iphonesimulator -F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Frameworks -F/Applications/Xcode.app/Contents/Developer/Library/Frameworks -MMD -MT dependencies -MF /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Objects-normal/x86_64/NMBStringify.d --serialize-diagnostics /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Objects-normal/x86_64/NMBStringify.dia -c /***someUserDirectory***/Projects/airlib/Carthage/Checkouts/Nimble/Sources/NimbleObjectiveC/NMBStringify.m -o /***someUserDirectory***/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2/Build/Intermediates.noindex/Nimble.build/Release-iphonesimulator/Nimble-iOS.build/Objects-normal/x86_64/NMBStringify.o

Virtually the same but with slightly different pathing. For some reason it can't find the header files required for the Obj-c files in Nimble to build.

For the life of me I don't know why Xcode can't find the header file in one directory yet it can't in another. I have taken the project out of the

More Info

When Carthage fails The following log output is from a script that deletes the old Carthage directory, this should be removed since we don't upload the Carthage files anymore, and then calls

carthage bootstrap --no-build
carthage bootstrap Quick Nimble --platform ios --cache-builds

this is what the log says

Git prune
Delete Old Carthage Directory
rm: Carthage: No such file or directory
Carthage Bootstrap
*** Checking out MBProgressHUD at "1.1.1"
*** Checking out XCGLogger at "7.0.0"
*** Cloning MBProgressHUD
*** Checking out CocoaAsyncSocket at "7.6.3"
*** Checking out Nimble at "v8.0.2"
*** Checking out Quick at "v2.1.0"
*** Checking out BlueSocket at "1.0.46"
*** Checking out Quick at "v2.1.0"
*** Checking out Nimble at "v8.0.2"
*** No cache found for Nimble, building with all downstream dependencies
*** No cache found for Quick, building with all downstream dependencies
*** xcodebuild output can be found in /var/folders/rc/28t61gwn3c1bcsn1b360d0h40000gq/T/carthage-xcodebuild.HH0nlH.log
*** Building scheme "Nimble-iOS" in Nimble.xcodeproj
Build Failed
    Task failed with exit code 65:
    /usr/bin/xcrun xcodebuild -project /Users/XcodeServer/Library/Caches/XCSBuilder/Bots/8e543991f99daae3015cbc6c419dba56/Source/airlib/Carthage/Checkouts/Nimble/Nimble.xcodeproj -scheme Nimble-iOS -configuration Release -derivedDataPath /Users/XcodeServer/Library/Caches/org.carthage.CarthageKit/DerivedData/10.2_10E125/Nimble/v8.0.2 -sdk iphonesimulator -destination platform=iOS\ Simulator,id=5A944081-C045-401A-889E-72B41BB3C8CA -destination-timeout 3 ONLY_ACTIVE_ARCH=NO CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES build (launched in /Users/XcodeServer/Library/Caches/XCSBuilder/Bots/8e543991f99daae3015cbc6c419dba56/Source/airlib/Carthage/Checkouts/Nimble)

This usually indicates that project itself failed to compile. Please check the xcodebuild log for more details: /var/folders/rc/28t61gwn3c1bcsn1b360d0h40000gq/T/carthage-xcodebuild.HH0nlH.log

This is what happens when I manually do it

Git prune
Delete Old Carthage Directory
rm: Carthage: No such file or directory
Carthage Bootstrap
*** Checking out Quick at "v2.1.0"
*** Checking out SVProgressHUD at "2.2.5"
*** Checking out XCGLogger at "7.0.0"
*** Checking out Nimble at "v8.0.2"
*** Checking out BlueSocket at "1.0.46"
*** Checking out CocoaAsyncSocket at "7.6.3"
*** Checking out Nimble at "v8.0.2"
*** Checking out Quick at "v2.1.0"
*** No cache found for Nimble, building with all downstream dependencies
*** No cache found for Quick, building with all downstream dependencies
*** xcodebuild output can be found in /var/folders/rc/28t61gwn3c1bcsn1b360d0h40000gq/T/carthage-xcodebuild.GnvVo9.log
*** Building scheme "Nimble-iOS" in Nimble.xcodeproj
*** Building scheme "Quick-iOS" in Quick.xcworkspace

Answer 1

I upgraded to XCode 11 and now it builds correctly.

In case the Nimble team is listening, the issue seemed to only pop up when building for release.

Answer 2

I ran into this same issue with Nimble when trying to use Xcode11.2. What fixed it was deleting the Nimble folder from my Carthage/Checkouts folder. That got Carthage to checkout the files again, and from there it built just fine. I'm not sure why that worked, but I suspect folder/file permissions.