```androidComponets { onVariants { pri...

# gradle

[ursus]

androidComponets {
    onVariants {
        println "variant=$it"
    }
}

why does this not compile? its eaxcly the official sample

[ephemient]

pretty sure onVariants is AGP 7.0+

[ursus]

Yea I know, still nothing

[Vampire]

Probably the missing n in components

[ursus]

🤦🤦🤦🤦🤦🤦🤦😂 im so sorry guys

[ursus]

Anyways, that was stupid, but it still doesnt work

androidComponents {
    onVariants { variant ->
        println "variant=$variant"
    }
}

* Where:
Build file 'C:\Misc\mo2-android\tesco-mobile\app\build.gradle' line: 162

* What went wrong:
A problem occurred evaluating project ':tesco-mobile:app'.
> No signature of method: build_7qrc4nz4nypxqatfu7rooj9dy.androidComponents() is applicable for argument types: (build_7qrc4nz4nypxqatfu7rooj9dy$_run_closure2) values: [build_7qrc4nz4nypxqatfu7rooj9dy$_run_closure2@3d15c5c7]

the 162 is the androidComponents line

https://developer.android.com/reference/tools/gradle-api/7.0/com/android/build/api/extension/AndroidComponentsExtension#onvariants
AGP 7.0.0-beta05

Should work, right?

[ursus]

After some trial and error, this works

androidComponents {
    onVariants(selector().all()) { variant ->
        println "variant=$variant"
    }
}

but why? the function has it as a default param, so I should be able to call it paramless on my end? is this a groovy thing?

[ursus]

anyways, my point of messing with the variants api was configuration avoidance, and it still prints when running gradlew help so I guess its just syntactic sugar 😕

[Vampire]

Groovy has method parameters with default values and Kotlin too. But if the class is written in Kotlin, the Kotlin Java interop applies. So to quote https://kotlinlang.org/docs/java-to-kotlin-interop.html#overloads-generation:

Normally, if you write a Kotlin function with default parameter values, it will be visible in Java only as a full signature, with all parameters present. If you wish to expose multiple overloads to Java callers, you can use the @JvmOverloads annotation.

So when calling a Kotlin function with default parameters, you have to provide all arguments. If the developers would be nice and honor that a usage from Groovy is likely for a Gradle plugin, they could add that annotation so that the overloads are generated.

[ursus]

ill open a bug with them thanks!

[ursus]

https://issuetracker.google.com/issues/193919820