How to import firebase into a module other than the app module?

Question

I want to make a multi module app with separate Data module. Can I import firebase in a plain kotlin module, and if not, how should I modify my Data module to be able to import firebase into it?

buildscript {
  repositories {
    google()
    jcenter()
  }
  dependencies {
    classpath 'com.google.gms:google-services:4.3.2'
  }
}
plugins {
  id "org.jetbrains.kotlin.jvm"
}
dependencies {
  def moduleDependencies = rootProject.ext.remoteDependencies
  def moduleTestDependencies = rootProject.ext.remoteTestDependencies

  implementation moduleDependencies.firestore
  implementation moduleDependencies.firestoreKtx
}
compileKotlin {
  kotlinOptions.jvmTarget = "1.8"
}
apply plugin: 'com.google.gms.google-services'

This is my current build file inside my data module. Currently I am able to sync, and build, but I can't import firebase libraries inside the module.

Edit: The problem is that I want to use firestore inside a module other than the app module, but when I add the dependencies for it inside the data module, I can't use Firestore (because of unresolved reference)

Answer 1

The problem was that I tried to use firestore inside a pure kotlin library, to solve the problem I had to add: apply plugin: 'com.android.library', and apply plugin: 'kotlin-android', and an android block to the gradle file of the module. (Basically I had to convert my kotlin library to an android library)