performance issue caused by injectable_generator running on dependencies and not only on app folder when running build_runner

[pedrosantosdd]

Running build_runner in debug mode, i have found a strange behavior in injectable_generator that seems to be the cause of the exponential time raises in this step.

Problem

I have a monorepo and recenty looking for the causes that takes my pipeline to take too much time 9 minutes (avg). When build_runner generate starts using melos, the shared code (Modules) run first and than the apps code sequentially. The output of build_runner accuses something very strange injectable_generate is running on dependecies path and not only in package path (lib, test).

[FINE] injectable_generator:injectable_builder on package:apps_catalog/interactor/cubit/product_page_cubit.dart:Running Instance of 'InjectableGenerator'

I have tried to limit the folder that injectable_generator and injectable_builder should look at using build.yaml but doesnt takes any effect on this problem.

Output console from build_runner generate on apps after modules

[FINE] injectable_generator:injectable_builder on package:apps_catalog/interactor/type_converters/product_child_order_converter.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on package:apps_catalog/interactor/events/product_page_event.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on package:apps_catalog/interactor/cubit/catalog_page_cubit.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on package:apps_catalog/interactor/cubit/catalog_listing_cubit.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on package:apps_catalog/interactor/events/shopping_cart_event.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on package:apps_catalog/interactor/cubit/shopping_cart_cubit.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on package:apps_catalog/interactor/cubit/product_page_cubit.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on lib/src/data/datasources/remotes/screensaver/get/screensaver_get_datasource.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on lib/src/data/datasources/remotes/screensaver/get/screensaver_get_v1_datasource_mock_impl.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on lib/src/data/datasources/remotes/screensaver/get/parser/get_data_parser.dart:Running Instance of 'InjectableGenerator'
[FINE] injectable_generator:injectable_builder on lib/src/data/datasources/remotes/screensaver/get/screensaver_get_v1_datasource_impl.dart:Running Instance of 'InjectableGenerator'

Minimal reproducible example

Struct Folder

• Apps (Similars apps that share some modules and design system widgets)
• Modules (Business Rules, Data Sources)
• Shared (Tools, Design System)

build_runner command using melos

generate:debug:
    run: dart run build_runner build --delete-conflicting-outputs --verbose
    exec:
      orderDependents: true
      failFast: true
    packageFilters:
      dependsOn:
        - build_runner
    description: Run code generation using build_runner in a specific package