If you’re developing Scala apps and let them be checked by Codacy, you might have enabled the check “Imports should be sorted alphabetically“.
What sounds easy, isn’t in fact.

Here are my findings, summarised as example imports.

import akka.actor.ActorRef

import akka.Done // upper/lowercase doesn't matter
import akka.streams.Source

import java.util.ArrayList // this needs to be in the middle of the packages, most IDEs put it into an extra block

import mycompany.mypackage._ // underscore is always before

import mycompany.mypackage.mysubpackage.mysubsubpackage.A

import mycompany.mypackage.{ClassA, ClassB, ClassC}
import mycompany.otherpackage.SomeProtocol // space before dot 
import mycompany.otherpackage.SomeProtocol.{MessageA, MessageB}
import org.slf4j.LoggerFactory
import pureconfig._ // again, underscore before
import pureconfig.generic.{ExportMacros, ProductHint}
import scala.concurrent.{ExecutionContext, Future}
import scala.collection.JavaConverters._
import scala.io.Source
import scala.util.{Failure, Success} // normal IDEs put all scala.* classes into an extra block at the end of all import statements
import slick.basic.DatabaseConfig
import slick.jdbc.JdbcProfileCode language: Scala (scala)

I hope this helps someone.. I’m sure, I’ll check back on this page in about a week again….