first time using kotlin-inject, and it’s pretty co...

# kotlin-inject

[parth]

first time using kotlin-inject, and it’s pretty cool!

I had to learn one the hard way…. could maybe be useful feedback for docs or FRs:

@Provides methods need to be wrapped in a @Component, else they don’t get picked up.

e.g.

//in file network.kt
@Provides
fun provideOkhttpClient(): OkHttpClient {
    return OkHttpClient.Builder().build()
}

this won’t work, it needs to be

@ContributesTo(AppScope::class) //k-i-anvil annotation
interface NetworkComponent {
  @Provides fun okhttp(): OkHttpClient { ... }
}

FR: could be cool to allow @Provides on toplevel functions without a Component wrapper. Or have something in the docs for Dagger converts that says “use @Component like Dagger uses `@Module`”

[evant]

I've been collecting doc improvement ideas here if you want to reference/add https://github.com/evant/kotlin-inject/issues/389

[parth]

oh nice, will do

[evant]

as for 'top-level' provides it needs to be findable by the component. there's not a mechanism in base kotlin-inject to make this possible but I'd imagine @ContributesTo in anvil might be able to be extended to make it work

[parth]

yeah good point! what I’m currently writing in my issue comment, but i’ll put here as well – i sorta assumed that because @Inject could be applied to top-level functions, so could @Provides

[evant]

it does this by linking it to a type that's referenced in your component. which feels a little magical at the moment to be fair (https://github.com/evant/kotlin-inject/issues/252#issuecomment-2198786073 has some thought on that)

The big no-no would be requiring the entire classpath to be scanned which a bare @Provides would require.