Prebuilt frameworks using Swift 5.5 (Carthage) about aws-mobile-appsync-sdk-ios

[ameter]

Hi @pokryfka, thanks for bringing this to our attention. aws-mobile-appsync-sdk-ios uses Travis CI, which does not yet support Xcode 13.

Until Xcode 13 is available in our CI pipeline, it should be possible for Carthage to build the SDK from source. Is this behavior working for you?

[pokryfka]

Thank you for following up on that.

Yes, I can compile it.

The main issue with it is that it takes quite a long time.
It compiles all the targets of AWSCore, most of them are not needed by AppSync itself.

Looking forward to CI update.

[pokryfka]

@ameter Travis CI added an image with Xcode 13.1

from https://docs.travis-ci.com/user/reference/osx/#xcode-version

Xcode 13.1 is available by adding osx_image: xcode13.1 to your .travis.yml.

[pokryfka]

👋

[ameter]

@pokryfka Thanks for following up. We'll update the build and provide an update here when the new version is ready.

[diegocstn]

@pokryfka we updated our CI script and released a new of version of the SDK. Let us know if that solves your issues

[pokryfka]

Thank you for the change.
Unfortunately ABI changed again and the latest stable version, 5.5.2, is not binary compatible with 5.5.1 :/
I guess its primarily because of async/await backward compatibility.

*** Downloading aws-mobile-appsync-sdk-ios binary at "3.4.2"
***  Skipped installing aws-mobile-appsync-sdk-ios binary due to the error:
	"Incompatible Swift version - framework was built with 5.5.1 (swiftlang-1300.0.31.4 clang-1300.0.29.6) and the local version is 5.5.2 (swiftlang-1300.0.47.5 clang-1300.0.29.30)."

Please note that Travis does have image with Xcode 13.2.1/Swift 5.5.2:

Xcode 13.2.1 is available by adding osx_image: xcode13.2 to your .travis.yml.

[pokryfka]

Thank you!

[pokryfka]

Well, binaries are fetched as expected but they dont include AppSync at all.

[diegocstn]

@pokryfka We released AppSync SDK v3.5.0 that includes a pre-built version of the framework bundled in a XCFramework. Let us know if that solves your issue.

[pokryfka]

@pokryfka We released AppSync SDK v3.5.0 that includes a pre-built version of the framework bundled in a XCFramework. Let us know if that solves your issue.

Thank you for the update.

I made a quick test and the generated framework can be imported (embedded), however when the library is loaded (runtime) it lacks some symbols from AppSyncRealTimeClient.
(I did embed AppSyncRealTimeClient).
Will try to investigate further.

dyld[41253]: Symbol not found: _$s21AppSyncRealTimeClient0aB11MessageTypeO9subscribeyACSScACmFWC
  Referenced from: /Users/michal/Library/Developer/Xcode/DerivedData/SuperPro-buvmonsqzsflotdpwrvmqdchvsof/Build/Products/Debug-iphonesimulator/AWSAppSync.framework/AWSAppSync
  Expected in: /Users/michal/Library/Developer/Xcode/DerivedData/SuperPro-buvmonsqzsflotdpwrvmqdchvsof/Build/Products/Debug-iphonesimulator/AppSyncRealTimeClient.framework/AppSyncRealTimeClient
Symbol not found: _$s21AppSyncRealTimeClient0aB11MessageTypeO9subscribeyACSScACmFWC

---

For the record, Cartfile does not pin any specific version:

github "awslabs/aws-mobile-appsync-sdk-ios"

and its resolved to:

github "aws-amplify/aws-appsync-realtime-client-ios" "1.9.0"
github "aws/aws-sdk-ios" "2.27.1"
github "awslabs/aws-mobile-appsync-sdk-ios" "3.5.0"
github "daltoniam/starscream" "4.0.4"
github "stephencelis/SQLite.swift" "0.12.2"

[diegocstn]

@pokryfka are you getting that error from a clean build? If you haven't done that already, I'd also recommend to clean your derived data folder just to rule out that the issue isn't related to old artifacts.

[pokryfka]

@pokryfka are you getting that error from a clean build? If you haven't done that already, I'd also recommend to clean your derived data folder just to rule out that the issue isn't related to old artifacts.

removing derived data does not help.
I just rechecked it in clean environment and the problem remains:

dyld[37985]: Symbol not found: _$s21AppSyncRealTimeClient0aB11MessageTypeO9subscribeyACSScACmFWC
  Referenced from: /Users/pokryfka/Library/Developer/Xcode/DerivedData/SuperPro-aojgolpochodiodkgrdjucubyrye/Build/Products/Debug-iphonesimulator/AWSAppSync.framework/AWSAppSync

The problem does not happen when I build xframeworks myself which I do using using Carthage:

carthage build --use-xcframeworks --platform ios --no-use-binaries

(without --no-use-binaries Carthage downloads binaries which saves a lot of compilation time but, for now, does not work - see error above)

Cartfile:

github "awslabs/aws-mobile-appsync-sdk-ios"

Cartfile.resolved:

github "aws-amplify/aws-appsync-realtime-client-ios" "1.9.0"
github "aws/aws-sdk-ios" "2.27.2"
github "awslabs/aws-mobile-appsync-sdk-ios" "3.5.0"
github "daltoniam/starscream" "4.0.4"
github "stephencelis/SQLite.swift" "0.12.2"

--

enums seem to be compiled/bridged/exported differently,
I also noticed warning when switching AWSAppSyncClientError value to handle "unknown" case
which does not happen when I compile frameworks myself.

[pokryfka]

BTW Reachibility is not explicitly listed as dependency, it used to be prior to 3.5.0

[diegocstn]

@pokryfka how are you linking the framework in your project?
Your target should be linking at least the following binaries:

• AppSyncRealTimeClient
• AWSAppSync
• AWSCore
• SQLite
• Starscream

BTW Reachibility is not explicitly listed as dependency, it used to be prior to 3.5.0

That's expected, we've opted to temporarily embed and renamed that to AWSAppSyncReachability to circumvent this Swift compiler issue. In the long term we'd like to use Apple's Network framework.

[pokryfka]

right, I link all of these:

private let appSyncFrameworks = [
    "AWSAppSync",
    "AppSyncRealTimeClient",
    "AWSCore",
    "SQLite",
    "Starscream",
    "Reachability",
]

it all works well when I build them myself via carthage build --use-xcframeworks --platform ios --no-use-binaries
if I fetch them, which I do using carthage build --use-xcframeworks --platform ios there are linking problems

[pokryfka]

we can close it as far as I am concerned,
I switched to SPM as Xcode support of SPM got a bit better

BTW I noticed that even when adding AppSync via SPM it still gets AWSCore xcframeworks,
its just that they are not downloaded by Carthage