manually inject local micro package modules

[Jaew00Shin]

import 'package:app_factory_core/app_factory_core.dart';
import 'package:app_factory_dev/src/di/configure_dependencies.config.dart';
import 'package:get_it/get_it.dart';
import 'package:injectable/injectable.dart';

final getIt = GetIt.instance;

@InjectableInit(
  asExtension: false,
  generateForDir: ['lib/src/di'],
  initializerName: r'$initModuleGetIt',
  includeMicroPackages: false,
  externalPackageModulesAfter: [
    ExternalModule(AppFactoryCorePackageModule),
  ],
)
Future<void> configureDependencies() async {
  $initModuleGetIt(getIt);
}

The above one is working well.
AppFactoryCorePackageModule is external package from the other package.

dependencies:
  app_factory_core:
    path: ../app_factory_core

AppFactoryCorePakcageModule is defined and is generated in app_factory_core.

But,

import 'package:app_factory_core/app_factory_core.dart';
import 'package:app_factory_dev/src/di/configure_dependencies.config.dart';
import 'package:get_it/get_it.dart';
import 'package:injectable/injectable.dart';

import 'initialize_app_dependencies.module.dart';

final getIt = GetIt.instance;

@InjectableInit(
  asExtension: false,
  generateForDir: ['lib/src/di'],
  initializerName: r'$initModuleGetIt',
  includeMicroPackages: false,
  externalPackageModulesAfter: [
    ExternalModule(AppFactoryCorePackageModule),
    ExternalModule(AppFactoryDevPackageModule),
  ],
)
Future<void> configureDependencies() async {
  $initModuleGetIt(getIt);
}

If I add local micro package AppFactoryDevPackageModule, FormatException occurs.

[INFO] Running build...
[app_factory_dev]: [SEVERE] injectable_generator:injectable_config_builder on lib/src/di/configure_dependencies.dart:
[app_factory_dev]: 
[app_factory_dev]: FormatException: Not an instance of Type.
[app_factory_dev]: [INFO] Running build completed, took 287ms
[app_factory_dev]: 
[app_factory_dev]: [INFO] Caching finalized dependency graph...
[app_factory_dev]: [INFO] Caching finalized dependency graph completed, took 51ms
[app_factory_dev]: 
[app_factory_dev]: [SEVERE] Failed after 341ms

The document in pub.dev said that "it's also possible to include micro local or external modules manually by passing them to the externalPackageModules property inside of @injectableInit so they're initialized with the rest of the local dependencies."
But it doesn't work to manually pass local modules.

How can I add local modules to externalPackagesModule?

[ryanhanks-bestow]

@ Jaew00Shin I think it's because the same builder that's inspecting the @InjectableInit and thus attempting to resolve AppFactoryDevPackageModule is also the builder responsible for generating .module.dart asset, so from the builder's perspective that asset doesn't exist yet at this moment in the build cycle.

My hunch comes from reproducing what you demonstrated above and then testing the theory by:

1. Allowing the builder to successfully finish a production of AppFactoryDevPackageModule (in this example, we assume it must be being built to initialize_app_dependencies.module.dart)
2. Copying that file to another location with an extension not associated with this builders output (i.e., anything other than .module.dart – I copied by test from package.module.dart to package.module2.dart)
3. importing the copy of the generated asset into the file I was building initModuleGetIt from

This copied version of the produced asset now lives outside of the build lifecycle and the builder is properly able to resolve and inspect it, and the build for $initModuleGetIt then successfully completes.

There could be more nuance around the timing to this, as there's a couple builders involved in the production here, one of which produces an interim asset in the cache (https://github.com/Milad-Akarie/injectable/blob/2f3422bc5d0f35b9f08abbb7bce2388219df2603/injectable_generator/build.yaml#L5C1-L12C67). In the config for these builders we do notice the 2nd builder produces both .configure.dart and .module.dart – if you're gung ho on solving this you could probably write your own configuration for that set of outputs as two separate builders configurations and use required_inputs to declare the .configure.dart asset to require the .module.dart output as input (https://github.com/dart-lang/build/blob/master/docs/build_yaml_format.md#builderdefinition), but idk  🤷‍♂️

[SEVERE] injectable_generator:injectable_config_builder on lib/configure.dart:

FormatException: Not an instance of Type.
[INFO] Running build completed, took 34ms
[INFO] Caching finalized dependency graph completed, took 4ms
[SEVERE] Failed after 40ms
[INFO] ------------------------------------------------------------------------
[INFO] Starting Build
[INFO] Updating asset graph completed, took 0ms
[INFO] Running build completed, took 27ms
[INFO] Caching finalized dependency graph completed, took 4ms
[SEVERE] injectable_generator:injectable_config_builder on lib/configure.dart (cached):

FormatException: Not an instance of Type.
[SEVERE] Failed after 36ms
[INFO] ------------------------------------------------------------------------
[INFO] Starting Build
[INFO] Updating asset graph completed, took 0ms
[INFO] Running build completed, took 61ms
[INFO] Caching finalized dependency graph completed, took 5ms
[INFO] Succeeded after 67ms with 1 outputs (4 actions)

[ryanhanks-bestow]

This might be another hacky approach you could try https://github.com/dart-lang/build/blob/master/docs/faq.md#how-can-i-adjust-builder-ordering