build.mill

package build

import mill._, scalalib._, scalafmt._
import $packages._
import $file.{versions => v}

def isBookChapter(p: os.Path) = os.isDir(p) && "ch\\d{2}".r.matches(p.baseName)

def moduleNames = interp.watchValue(
    os.walk(millSourcePath, !isBookChapter(_), maxDepth = 1)
      .map(_.last)
)

object modules extends Cross[CatsModule](moduleNames)

trait CatsModule extends ScalaModule with Cross.Module[String] with ScalafmtModule {

  val scalaVersion = v.scalaVersion

  // Ends with 'modules' that need to be removed
  def millSourcePath = super.millSourcePath / os.up / crossValue

  def scalacOptions: T[Seq[String]] = Seq(
    "-encoding", "UTF-8",
    "-feature",
    "-Werror",
    "-explain",
    "-deprecation",
    "-unchecked",
    "-Wunused:all",
    "-rewrite",
    "-indent",
    "-source", "future",
  )

  def ivyDeps = Agg(
    ivy"org.typelevel::cats-core:${v.catsVersion}"
  )

  object test extends ScalaTests with TestModule.ScalaTest {
   def ivyDeps = Agg(
     ivy"org.scalatest::scalatest:${v.scalatestVersion}",
     ivy"org.scalatestplus::scalacheck-1-18:${v.scalacheckVersion}"
   )
  }
}