Asset build fails with "Null check operator used on a null value" in CodeConfig._fromJson

[SherpaMiguel]

Bug Report: Asset build fails on objective_c-9.2.0 hook

The asset building process for the objective_c package is failing with a Null check operator used on a null value error during configuration parsing. This prevents the project from building.

Version:

• objective_c: 9.2.0
• Flutter/Dart SDK Version: Flutter 3.38.3. Dart 3.10.1.

Stack Trace:

Unhandled exception: Null check operator used on a null value #0 new CodeConfig._fromJson (package:code_assets/src/code_assets/config.dart:52:67) #1 HookConfigCodeConfig.code (package:code_assets/src/code_assets/config.dart:21:37) #2 main.<anonymous closure> (file:///Users/miguel/.pub-cache/hosted/pub.dev/objective_c-9.2.0/hook/build.dart:31:29) #3 build (package:hooks/src/api/build_and_link.dart:158:18) #4 main (file:///Users/miguel/.pub-cache/hosted/pub.dev/objective_c-9.2.0/hook/build.dart:29:9) #5 _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:312:33) #6 _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:193:12)

Building assets for package:objective_c failed. build.dart returned with exit code: 255.

[dcharkes]

@liamappelbe I believe if (input.config.buildCodeAssets) { is missing. It looks like the code config is not available.

@SherpaMiguel Could you provide a minimal reproduction?

[stuartmorgan-g]

I don't have a minimal reproduction, but this is bringing down web builds in flutter/packages. Locally I can repro by making path_provider use a local override to the repo copy of path_provider_foundation (to bypass the rectration of 2.5.0) and then doing flutter run -d chrome in the example.

Testing your PR now.

[stuartmorgan-g]

#2825 fixes building for web in my local repro.