package.mill

package build.core

import mill._
import mill.scalalib._
import mill.scalalib.scalafmt._
import mill.define.Cross
import de.tobiasroeser.mill.vcs.version.VcsVersion // pulled in by mill-ci-release

import build._

object `package` extends RootModule {
  // https://github.com/com-lihaoyi/mill/issues/3693
  object cross extends Cross[Core](v.scalaCrossVersions)
}

trait Core extends CrossSbtModule with HasScala2MacroAnno with ScalafmtModule {
  def scalaVersion = crossScalaVersion

  def millSourcePath = super.millSourcePath / os.up

  override def scalacOptions = Task {
    if (v.isScala3(crossScalaVersion)) {
      Seq.empty[String]
    } else {
      v.scala2CommonOptions ++ Seq(
        "-Xsource:3"
      )
    }
  }

  val crossModuleDeps = Seq(firrtl.cross(crossScalaVersion)) ++ {
    if (v.isScala3(crossScalaVersion)) Seq.empty
    else Seq(macros.cross(crossScalaVersion))
  }

  override def moduleDeps = super.moduleDeps ++ crossModuleDeps

  val commonDeps = Agg(
    v.osLib,
    v.upickle
  )

  override def ivyDeps = if (v.isScala3(crossScalaVersion)) {
    super.ivyDeps() ++ commonDeps ++ Agg(v.firtoolResolver.withDottyCompat(scalaVersion()))
  } else {
    super.ivyDeps() ++ commonDeps ++ Agg(v.firtoolResolver)
  }

  // Similar to the publish version, but no dirty indicators because otherwise
  // this file will change any time any file is changed.
  def publishVersion = Task {
    VcsVersion
      .vcsState()
      .format(
        countSep = "+",
        revHashDigits = 8,
        untaggedSuffix = "-SNAPSHOT",
        dirtySep = "",
        dirtyHashDigits = 0
      )
  }
  def buildInfo = Task {
    val outputFile = Task.dest / "chisel3" / "BuildInfo.scala"
    val firtoolVersionString = "Some(\"" + v.firtoolVersion + "\")"
    val contents =
      s"""
         |package chisel3
         |case object BuildInfo {
         |  val buildInfoPackage: String = "chisel3"
         |  val version: String = "${publishVersion()}"
         |  val scalaVersion: String = "${scalaVersion()}"
         |  @deprecated("Chisel no longer uses SBT, this field will be removed.", "Chisel 7.0")
         |  val sbtVersion: String = ""
         |  val firtoolVersion: scala.Option[String] = $firtoolVersionString
         |  override val toString: String = {
         |    "buildInfoPackage: %s, version: %s, scalaVersion: %s, firtoolVersion %s".format(
         |        buildInfoPackage, version, scalaVersion, firtoolVersion
         |    )
         |  }
         |}
         |""".stripMargin
    os.write(outputFile, contents, createFolders = true)
    PathRef(Task.dest)
  }
  override def generatedSources = Task {
    super.generatedSources() :+ buildInfo()
  }
}