When applying the above plugin I’m getting the error: `A problem occurred configuring root project '...

# gradle

[Alexander Suraphel]

When applying the above plugin I’m getting the error:
A problem occurred configuring root project ''.
> 'kotlin-android' plugin requires one of the Android Gradle plugins.
Please apply one of the following plugins to ':' project:
- com.android.application
- com.android.library
- com.android.dynamic-feature
- com.android.asset-pack
- com.android.asset-pack-bundle
- com.android.lint
- com.android.test
- com.android.instantapp
- com.android.feature
What am I missing?

[mbonnin]

You're most likely applying the kotlin-android plugin in the root project instead of app

[Alexander Suraphel]

That’s right

[Alexander Suraphel]

doing it on the app gives me:

Plugin request for plugin already on the classpath must not include a version

[Alexander Suraphel]

But Google recommends supplying the plugin

[Alexander Suraphel]

sorry for the loaded question. I hope you understand my concern @mbonnin

[mbonnin]

Oh yea I 💯 understand, I've been there 😅

[mbonnin]

In the app module, do

plugins {
    id 'org.jetbrains.kotlin.android' 
}

[Alexander Suraphel]

dropping the version gives me

[Alexander Suraphel]

An exception occurred applying plugin request [id: ‘org.jetbrains.kotlin.android’]

Failed to apply plugin ‘org.jetbrains.kotlin.android’.

> Extension with name ‘android’ does not exist. Currently registered extension names: [ext, kotlin, kotlinTestRegistry]

[mbonnin]

Make sure to add kotlin after android

[mbonnin]

plugins {
    id 'com.android.application' 
    id 'org.jetbrains.kotlin.android' 
}

[Alexander Suraphel]

This worked @mbonnin!

[Alexander Suraphel]

The thing i didn’t understand is:
Plugin request for plugin already on the classpath must not include a version

[Alexander Suraphel]

when I include the version

[Alexander Suraphel]

why?

[mbonnin]

Because there would be a conflict between the version you declare in the root classpath and the one in the app plugins {}

[mbonnin]

You can read https://dev.to/autonomousapps/a-crash-course-in-classpaths-build-l08 for insigths about Gradle classloaders

[mbonnin]

And https://docs.gradle.org/current/userguide/plugins.html#sec:plugin_markers for the difference between artifacts, pluginId and pluginMarkers

[Alexander Suraphel]

Okay thanks a lot @mbonnin

[mbonnin]

Sure thing!