build.sc

import mill._
import mill.scalalib._
import mill.scalalib.publish._

def isJitPack = T.input {
  val jitPack = T.env.getOrElse("JITPACK", "false").toBoolean
  T.log.info(s"JitPack: $jitPack")
  jitPack
}

// Support for Maven Central and JitPack
def envGroup = T.input {
  val g = T.env.get("GROUP").map(g => s"${g}.mill-jib").getOrElse( "io.github.atty303")
  T.log.info(s"Group: $g")
  g
}

// Support for Maven Central and JitPack
def envVersion = T.input {
  val v = T.env.getOrElse("VERSION", "0.3.0")
  T.log.info(s"Version: $v")
  v
}

trait MyPublishModule extends PublishModule {
  override def publishVersion = envVersion()
  override def pomSettings = PomSettings(
    description = "Dockerize java applications on mill builds",
    organization = envGroup(),
    url = "https://github.com/atty303/mill-jib",
    licenses = Seq(License.MIT),
    versionControl = VersionControl.github("atty303", "mill-jib"),
    developers =
      Seq(Developer("atty303", "Koji AGAWA", "https://github.com/atty303"))
  )
}

trait MyModule extends MyPublishModule with ScalaModule {
  def scalaVersion = "2.13.16"
}

def millVersion = "0.11.1"

object api extends MyModule {
  override def artifactName = "mill-jib-api"
  override def compileIvyDeps = Agg(
    ivy"com.lihaoyi::mill-scalalib:${millVersion}"
  )
}

object worker extends MyModule {
  override def artifactName = "mill-jib-worker"
  override def moduleDeps = Seq(api)
  override def compileIvyDeps = Agg(
    ivy"com.lihaoyi::mill-scalalib:${millVersion}",
    ivy"com.google.cloud.tools:jib-core:0.24.0"
  )
}

object jib extends MyModule {
  override def artifactName = "mill-jib"
  override def moduleDeps = Seq(api)

  override def compileIvyDeps = Agg(
    ivy"com.lihaoyi::mill-scalalib:${millVersion}"
  )

  override def generatedSources: T[Seq[PathRef]] = T {
    super.generatedSources() ++ {
      val dest = T.ctx().dest
      val millJibWorkerImplIvyDep =
        s"${worker.pomSettings().organization}:${worker.artifactId()}:${worker.publishVersion()}"
      val body =
        s"""package io.github.atty303.mill.jib
           |
           |/**
           | * Build-time generated versions file.
           | */
           |object Versions {
           |  /** The mill-aspectj version. */
           |  val millAspectjVersion = "${publishVersion()}"
           |  /** The mill API version used to build mill-jib. */
           |  val buildTimeMillVersion = "${millVersion}"
           |  /** The ivy dependency holding the mill jib worker impl. */
           |  val millJibWorkerImplIvyDep = "${millJibWorkerImplIvyDep}"
           |}
           |""".stripMargin

      os.write(dest / "Versions.scala", body)

      Seq(PathRef(dest))
    }
  }
}