build.sbt

name := "debug4s"
organization := "it.softfork"

scalaVersion := "2.13.6"
crossScalaVersions := Seq("2.13.6", "2.12.14")

scalacOptions ++= getScalacOptions(VersionNumber(scalaVersion.value))

libraryDependencies ++= Seq(
  "com.lihaoyi" %% "pprint" % "0.6.6",
  "org.scala-lang" % "scala-reflect" % scalaVersion.value,
  "org.scala-lang" % "scala-compiler" % scalaVersion.value,
  "org.scalatest" %% "scalatest" % "3.2.9" % Test
) ++ (if (priorTo2_13(scalaVersion.value)) Seq(
  compilerPlugin("org.scalamacros" % "paradise" % "2.1.1" cross CrossVersion.full)
) else Seq())

githubOwner := "liuhongchao"
githubRepository := "debug4s"
publishMavenStyle := true
ThisBuild / publishTo := githubPublishTo.value

def priorTo2_13(version: String): Boolean =
  CrossVersion.partialVersion(version) match {
    case Some((2, minor)) if minor < 13 => true
    case _ => false
  }

def getScalacOptions(scalaVersion: VersionNumber): Seq[String] = {
  val common = Seq(
    "-deprecation", // Emit warning and location for usages of deprecated APIs.
    "-encoding",
    "utf-8", // Specify character encoding used by source files.
    "-explaintypes", // Explain type errors in more detail.
    "-feature", // Emit warning and location for usages of features that should be imported explicitly.
    "-language:existentials", // Existential types (besides wildcard types) can be written and inferred
    "-language:experimental.macros", // Allow macro definition (besides implementation and application)
    "-language:higherKinds", // Allow higher-kinded types
    "-language:implicitConversions", // Allow definition of implicit functions called views
    "-unchecked", // Enable additional warnings where generated code depends on assumptions.
    "-Xcheckinit", // Wrap field accessors to throw an exception on uninitialized access.
    "-Xlint:adapted-args", // Warn if an argument list is modified to match the receiver.
    "-Xlint:constant", // Evaluation of a constant arithmetic expression results in an error.
    "-Xlint:delayedinit-select", // Selecting member of DelayedInit.
    "-Xlint:doc-detached", // A Scaladoc comment appears to be detached from its element.
    "-Xlint:inaccessible", // Warn about inaccessible types in method signatures.
    "-Xlint:infer-any", // Warn when a type argument is inferred to be `Any`.
    "-Xlint:missing-interpolator", // A string literal appears to be missing an interpolator id.
    "-Xlint:nullary-unit", // Warn when nullary methods return Unit.
    "-Xlint:option-implicit", // Option.apply used implicit view.
    "-Xlint:package-object-classes", // Class or object defined in package object.
    "-Xlint:poly-implicit-overload", // Parameterized overloaded implicit methods are not visible as view bounds.
    "-Xlint:private-shadow", // A private field (or class parameter) shadows a superclass field.
    "-Xlint:stars-align", // Pattern sequence wildcard must align with sequence component.
    "-Xlint:type-parameter-shadow", // A local type parameter shadows a type already in scope.
    "-Ywarn-dead-code", // Warn when dead code is identified.
    "-Ywarn-extra-implicit", // Warn when more than one implicit parameter section is defined.
    "-Ywarn-numeric-widen", // Warn when numerics are widened.
    "-Ywarn-value-discard", // Warn when non-Unit expression results are unused.
    "-Ywarn-unused:implicits", // Warn if an implicit parameter is unused.
    "-Ywarn-unused:imports", // Warn if an import selector is not referenced.
    "-Ywarn-unused:locals", // Warn if a local definition is unused.
    "-Ywarn-unused:params", // Warn if a value parameter is unused.
    "-Ywarn-unused:patvars", // Warn if a variable bound in a pattern is unused.
    "-Ywarn-unused:privates" // Warn if a private member is unused.
  )

  if (scalaVersion.matchesSemVer(SemanticSelector(">=2.13"))) {
    common ++ Seq(
      "-Ybackend-parallelism",
      "8", // Enable parallelization — change to desired number!
      "-Ycache-plugin-class-loader:last-modified", // Enables caching of classloaders for compiler plugins
      "-Ycache-macro-class-loader:last-modified", // and macro definitions. This can lead to performance improvements.
      "-Wunused:nowarn" // Warn on unnecessary @nowarn
    )
  } else {
    common ++ Seq(
      "-Xfuture", // Turn on future language features.
      "-Xlint:by-name-right-associative", // By-name parameter of right associative operator.
      "-Xlint:unsound-match", // Pattern match may not be typesafe.
      "-Xlint:nullary-override", // Warn when non-nullary `def f()' overrides nullary `def f'.
      "-Yno-adapted-args", // Do not adapt an argument list (either by inserting () or creating a tuple) to match the receiver.
      "-Ypartial-unification", // Enable partial unification in type constructor inference
      "-Ywarn-inaccessible", // Warn about inaccessible types in method signatures.
      "-Ywarn-infer-any", // Warn when a type argument is inferred to be `Any`.
      "-Ywarn-nullary-override", // Warn when non-nullary `def f()' overrides nullary `def f'.
      "-Ywarn-nullary-unit" // Warn when nullary methods return Unit.
    )
  }
}

licenses += ("MIT", url("http://opensource.org/licenses/MIT"))