build.sbt

import microsites._
import ReleaseTransformations._
import scala.xml.transform.{RewriteRule, RuleTransformer}
import sbtcrossproject.CrossProject
import sbtcrossproject.CrossPlugin.autoImport.{crossProject, CrossType}

lazy val scoverageSettings = Seq(
  coverageMinimum := 60,
  coverageFailOnMinimum := false,
  coverageHighlighting := true
)

organization in ThisBuild := "org.typelevel"

lazy val commonSettings = Seq(
  scalacOptions ++= commonScalacOptions(scalaVersion.value),
  Compile / unmanagedSourceDirectories ++= {
    val bd = baseDirectory.value
    def extraDirs(suffix: String) =
      CrossType.Pure.sharedSrcDir(bd, "main").toList map (f => file(f.getPath + suffix))
    CrossVersion.partialVersion(scalaVersion.value) match {
      case Some((2, y)) if y <= 12 =>
        extraDirs("-2.12-")
      case Some((2, y)) if y >= 13 =>
        extraDirs("-2.13+")
      case _ => Nil
    }
  },
  coverageEnabled := {
    if(priorTo2_13(scalaVersion.value))
      coverageEnabled.value
    else
      false
  } ,
  resolvers ++= Seq(
    Resolver.sonatypeRepo("releases"),
    Resolver.sonatypeRepo("snapshots")),
  fork in test := true,
  libraryDependencies ++= Seq(
    "org.scala-lang.modules" %% "scala-collection-compat" % "0.1.1"),
  parallelExecution in Test := false,
  scalacOptions in (Compile, doc) := (scalacOptions in (Compile, doc)).value.filter(_ != "-Xfatal-warnings"),
  //todo: reenable doctests on 2.13 once it's officially released. it's disabled for now due to changes to the `toString` impl of collections
  doctestGenTests := {
    val unchanged = doctestGenTests.value
    if(priorTo2_13(scalaVersion.value)) unchanged else Nil
  },
  //todo: re-enable disable scaladoc on 2.13 due to https://github.com/scala/bug/issues/11045
  sources in (Compile, doc) := {
    val docSource = (sources in (Compile, doc)).value
    if (priorTo2_13(scalaVersion.value)) docSource else Nil
  }
) ++ warnUnusedImport ++ update2_12 ++ xlint


def macroDependencies(scalaVersion: String) =
  CrossVersion.partialVersion(scalaVersion) match {
    case Some((2, minor)) if minor < 13 => Seq(
      compilerPlugin("org.scalamacros" %% "paradise" % "2.1.0" cross CrossVersion.patch)
    )
    case _ => Seq()
  }


lazy val catsSettings = Seq(
  incOptions := incOptions.value.withLogRecompileOnMacro(false),
  resolvers ++= Seq(
    "bintray/non" at "http://dl.bintray.com/non/maven"
  ),
  libraryDependencies ++= Seq(
    "org.typelevel" %%% "machinist" % "0.6.5",
    compilerPlugin("org.spire-math" %% "kind-projector" % "0.9.7")) ++ macroDependencies(scalaVersion.value),

) ++ commonSettings ++ publishSettings ++ scoverageSettings ++ simulacrumSettings


lazy val simulacrumSettings = Seq(
  libraryDependencies += "com.github.mpilquist" %%% "simulacrum" % "0.13.0" % Provided,
  pomPostProcess := { (node: xml.Node) =>
    new RuleTransformer(new RewriteRule {
      override def transform(node: xml.Node): Seq[xml.Node] = node match {
        case e: xml.Elem
          if e.label == "dependency" &&
            e.child.exists(child => child.label == "groupId" && child.text == "com.github.mpilquist") &&
            e.child.exists(child => child.label == "artifactId" && child.text.startsWith("simulacrum_")) => Nil
        case _ => Seq(node)
      }
    }).transform(node).head
  }
)

lazy val tagName = Def.setting{
 s"v${if (releaseUseGlobalVersion.value) (version in ThisBuild).value else version.value}"
}

lazy val commonJsSettings = Seq(
  scalacOptions += {
    val tv = tagName.value
    val tagOrHash =
      if (isSnapshot.value) sys.process.Process("git rev-parse HEAD").lineStream_!.head
      else tv
    val a = (baseDirectory in LocalRootProject).value.toURI.toString
    val g = "https://raw.githubusercontent.com/typelevel/cats/" + tagOrHash
    s"-P:scalajs:mapSourceURI:$a->$g/"
  },
  scalaJSStage in Global := FastOptStage,
  parallelExecution := false,
  jsEnv := new org.scalajs.jsenv.nodejs.NodeJSEnv(),
  // batch mode decreases the amount of memory needed to compile scala.js code
  scalaJSOptimizerOptions := scalaJSOptimizerOptions.value.withBatchMode(isTravisBuild.value),
  // currently sbt-doctest doesn't work in JS builds
  // https://github.com/tkawachi/sbt-doctest/issues/52
  doctestGenTests := Seq.empty
)

lazy val commonJvmSettings = Seq(
  testOptions in Test += {
    val flag = if ((isTravisBuild in Global).value) "-oCI" else "-oDF"
    Tests.Argument(TestFrameworks.ScalaTest, flag)
  }
)

lazy val includeGeneratedSrc: Setting[_] = {
  mappings in (Compile, packageSrc) ++= {
    val base = (sourceManaged in Compile).value
    (managedSources in Compile).value.map { file =>
      file -> file.relativeTo(base).get.getPath
    }
  }
}



// 2.13.0-M4 workarounds
def catalystsVersion(scalaVersion: String): String =
  if (priorTo2_13(scalaVersion)) "0.6" else "0.7"

def scalatestVersion(scalaVersion: String): String =
  if (priorTo2_13(scalaVersion)) "3.0.5" else "3.0.6-SNAP1"

def scalaCheckVersion(scalaVersion: String): String =
  if (priorTo2_13(scalaVersion)) "1.13.5" else "1.14.0"

def disciplineVersion(scalaVersion: String): String =
  if (priorTo2_13(scalaVersion)) "0.9.0" else "0.10.0"

lazy val disciplineDependencies = Seq(
  libraryDependencies += "org.scalacheck" %%% "scalacheck" % scalaCheckVersion(scalaVersion.value),
  libraryDependencies += "org.typelevel" %%% "discipline" % disciplineVersion(scalaVersion.value))

lazy val testingDependencies = Seq(
  libraryDependencies += "org.typelevel" %%% "catalysts-platform" % catalystsVersion(scalaVersion.value),
  libraryDependencies += "org.typelevel" %%% "catalysts-macros" % catalystsVersion(scalaVersion.value) % "test",
  // 2.13.0-M3 workaround
  // libraryDependencies += "org.scalatest" %%% "scalatest" % scalaTestVersion % "test")
  libraryDependencies += "org.scalatest" %%% "scalatest" % scalatestVersion(scalaVersion.value) % "test")

lazy val docsMappingsAPIDir = settingKey[String]("Name of subdirectory in site target directory for api docs")

lazy val docSettings = Seq(
  micrositeName := "Cats",
  micrositeDescription := "Lightweight, modular, and extensible library for functional programming",
  micrositeAuthor := "Cats contributors",
  micrositeFooterText := Some(
    """
      |<p>© 2017 <a href="https://github.com/typelevel/cats#maintainers">The Cats Maintainers</a></p>
      |<p style="font-size: 80%; margin-top: 10px">Website built with <a href="https://47deg.github.io/sbt-microsites/">sbt-microsites © 2016 47 Degrees</a></p>
      |""".stripMargin),
  micrositeHighlightTheme := "atom-one-light",
  micrositeHomepage := "http://typelevel.org/cats/",
  micrositeBaseUrl := "cats",
  micrositeDocumentationUrl := "/cats/api/cats/index.html",
  micrositeDocumentationLabelDescription := "API Documentation",
  micrositeGithubOwner := "typelevel",
  micrositeExtraMdFiles := Map(
    file("CONTRIBUTING.md") -> ExtraMdFileConfig(
      "contributing.md",
      "home",
       Map("title" -> "Contributing", "section" -> "contributing", "position" -> "50")
    ),
    file("README.md") -> ExtraMdFileConfig(
      "index.md",
      "home",
      Map("title" -> "Home", "section" -> "home", "position" -> "0")
    )
  ),
  micrositeGithubRepo := "cats",
  micrositePalette := Map(
    "brand-primary" -> "#5B5988",
    "brand-secondary" -> "#292E53",
    "brand-tertiary" -> "#222749",
    "gray-dark" -> "#49494B",
    "gray" -> "#7B7B7E",
    "gray-light" -> "#E5E5E6",
    "gray-lighter" -> "#F4F3F4",
    "white-color" -> "#FFFFFF"),
  autoAPIMappings := true,
  unidocProjectFilter in (ScalaUnidoc, unidoc) := inProjects(kernelJVM, coreJVM, freeJVM),
  docsMappingsAPIDir := "api",
  addMappingsToSiteDir(mappings in (ScalaUnidoc, packageDoc), docsMappingsAPIDir),
  ghpagesNoJekyll := false,
  fork in tut := true,
  fork in (ScalaUnidoc, unidoc) := true,
  scalacOptions in (ScalaUnidoc, unidoc) ++= Seq(
    "-Xfatal-warnings",
    "-groups",
    "-doc-source-url", scmInfo.value.get.browseUrl + "/tree/master€{FILE_PATH}.scala",
    "-sourcepath", baseDirectory.in(LocalRootProject).value.getAbsolutePath,
    "-diagrams"
  ) ++ (if(priorTo2_13(scalaVersion.value)) Seq(
    "-Yno-adapted-args",
  ) else Seq(
    "-Ymacro-annotations"
  )),
  scalacOptions in Tut ~= (_.filterNot(Set("-Ywarn-unused-import", "-Ywarn-dead-code"))),
  git.remoteRepo := "git@github.com:typelevel/cats.git",
  includeFilter in makeSite := "*.html" | "*.css" | "*.png" | "*.jpg" | "*.gif" | "*.js" | "*.swf" | "*.yml" | "*.md" | "*.svg",
  includeFilter in Jekyll := (includeFilter in makeSite).value
)

def mimaSettings(moduleName: String) = {
  import sbtrelease.Version

  def semverBinCompatVersions(major: Int, minor: Int, patch: Int): Set[(Int, Int, Int)] = {
    val majorVersions: List[Int] = List(major)
    val minorVersions : List[Int] =
      if (major >= 1) Range(0, minor).inclusive.toList
      else List(minor)
    def patchVersions(currentMinVersion: Int): List[Int] =
      if (minor == 0 && patch == 0) List.empty[Int]
      else if (currentMinVersion != minor) List(0)
      else Range(0, patch - 1).inclusive.toList

    val versions = for {
      maj <- majorVersions
      min <- minorVersions
      pat <- patchVersions(min)
    } yield (maj, min, pat)
    versions.toSet
  }

  def mimaVersions(version: String): Set[String] = {
    Version(version) match {
      case Some(Version(major, Seq(minor, patch), _)) =>
        semverBinCompatVersions(major.toInt, minor.toInt, patch.toInt)
          .map{case (maj, min, pat) => s"${maj}.${min}.${pat}"}
      case _ =>
        Set.empty[String]
    }
  }
  // Safety Net For Exclusions
  lazy val excludedVersions: Set[String] = Set()

  // Safety Net for Inclusions
  lazy val extraVersions: Set[String] = Set()

  Seq(
    mimaPreviousArtifacts := { if(priorTo2_13(scalaVersion.value)) {
      (mimaVersions(version.value) ++ extraVersions)
        .filterNot(excludedVersions.contains(_))
        .map(v => "org.typelevel" %% moduleName % v)
    } else Set() },

    mimaBinaryIssueFilters ++= {
      import com.typesafe.tools.mima.core._
      import com.typesafe.tools.mima.core.ProblemFilters._
      //Only sealed abstract classes that provide implicit instances to companion objects are allowed here, since they don't affect usage outside of the file.
      Seq(
        exclude[DirectMissingMethodProblem]("cats.data.OptionTInstances.catsDataMonadForOptionT"),
        exclude[DirectMissingMethodProblem]("cats.data.OptionTInstances2.catsDataTraverseForOptionT"),
        exclude[DirectMissingMethodProblem]("cats.data.KleisliInstances1.catsDataCommutativeArrowForKleisliId"),
        exclude[DirectMissingMethodProblem]("cats.data.OptionTInstances1.catsDataMonoidKForOptionT"),
        exclude[DirectMissingMethodProblem]("cats.data.OptionTInstances0.catsDataMonoidForOptionT"),
        exclude[DirectMissingMethodProblem]("cats.data.KleisliInstances0.catsDataMonadForKleisliId"),
        exclude[DirectMissingMethodProblem]("cats.data.KleisliInstances1.catsDataCommutativeArrowForKleisli"),
        exclude[DirectMissingMethodProblem]("cats.data.KleisliInstances4.catsDataCommutativeFlatMapForKleisli"),
        exclude[DirectMissingMethodProblem]("cats.data.IRWSTInstances1.catsDataStrongForIRWST"),
        exclude[DirectMissingMethodProblem]("cats.data.OptionTInstances1.catsDataMonadErrorMonadForOptionT")
      )
    }
  )
}

lazy val docs = project
  .enablePlugins(MicrositesPlugin)
  .enablePlugins(ScalaUnidocPlugin)
  .settings(moduleName := "cats-docs")
  .settings(catsSettings)
  .settings(noPublishSettings)
  .settings(docSettings)
  .settings(commonJvmSettings)
  .dependsOn(coreJVM, freeJVM, kernelLawsJVM, lawsJVM, testkitJVM)

lazy val cats = project.in(file("."))
  .settings(moduleName := "root")
  .settings(catsSettings)
  .settings(noPublishSettings)
  .aggregate(catsJVM, catsJS)
  .dependsOn(catsJVM, catsJS, testsJVM % "test-internal -> test", bench % "compile-internal;test-internal -> test")

lazy val catsJVM = project.in(file(".catsJVM"))
  .settings(moduleName := "cats")
  .settings(noPublishSettings)
  .settings(catsSettings)
  .settings(commonJvmSettings)
  .aggregate(macrosJVM, kernelJVM, kernelLawsJVM, coreJVM, lawsJVM, freeJVM, testkitJVM, testsJVM, alleycatsCoreJVM, alleycatsLawsJVM, alleycatsTestsJVM, jvm, docs, bench)
  .dependsOn(macrosJVM, kernelJVM, kernelLawsJVM, coreJVM, lawsJVM, freeJVM, testkitJVM, testsJVM % "test-internal -> test", alleycatsCoreJVM, alleycatsLawsJVM, alleycatsTestsJVM % "test-internal -> test", jvm, bench % "compile-internal;test-internal -> test")

lazy val catsJS = project.in(file(".catsJS"))
  .settings(moduleName := "cats")
  .settings(noPublishSettings)
  .settings(catsSettings)
  .settings(commonJsSettings)
  .aggregate(macrosJS, kernelJS, kernelLawsJS, coreJS, lawsJS, freeJS, testkitJS, testsJS, alleycatsCoreJS, alleycatsLawsJS, alleycatsTestsJS, js)
  .dependsOn(macrosJS, kernelJS, kernelLawsJS, coreJS, lawsJS, freeJS, testkitJS, testsJS % "test-internal -> test", alleycatsCoreJS, alleycatsLawsJS, alleycatsTestsJS % "test-internal -> test", js)
  .enablePlugins(ScalaJSPlugin)


lazy val macros = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .settings(moduleName := "cats-macros", name := "Cats macros")
  .settings(catsSettings)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings)
  .jsSettings(coverageEnabled := false)
  .settings(scalacOptions := scalacOptions.value.filter(_ != "-Xfatal-warnings"))

lazy val macrosJVM = macros.jvm
lazy val macrosJS = macros.js


lazy val kernel = crossProject(JSPlatform, JVMPlatform, NativePlatform)
  .crossType(CrossType.Pure)
  .in(file("kernel"))
  .settings(moduleName := "cats-kernel", name := "Cats kernel")
  .settings(commonSettings)
  .settings(publishSettings)
  .settings(scoverageSettings)
  .settings(sourceGenerators in Compile += (sourceManaged in Compile).map(KernelBoiler.gen).taskValue)
  .settings(includeGeneratedSrc)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings ++ mimaSettings("cats-kernel"))


lazy val kernelJVM = kernel.jvm
lazy val kernelJS = kernel.js
lazy val kernelNative = kernel.native

lazy val kernelLaws = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .in(file("kernel-laws"))
  .settings(moduleName := "cats-kernel-laws", name := "Cats kernel laws")
  .settings(commonSettings)
  .settings(publishSettings)
  .settings(scoverageSettings)
  .settings(disciplineDependencies)
  .settings(testingDependencies)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings)
  .jsSettings(coverageEnabled := false)
  .dependsOn(kernel)

lazy val kernelLawsJVM = kernelLaws.jvm
lazy val kernelLawsJS = kernelLaws.js

lazy val core = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .dependsOn(macros, kernel)
  .settings(moduleName := "cats-core", name := "Cats core")
  .settings(catsSettings)
  .settings(sourceGenerators in Compile += (sourceManaged in Compile).map(Boilerplate.gen).taskValue)
  .settings(includeGeneratedSrc)
  .settings(libraryDependencies += "org.scalacheck" %%% "scalacheck" % scalaCheckVersion(scalaVersion.value) % "test")
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings ++ mimaSettings("cats-core") )

lazy val coreJVM = core.jvm
lazy val coreJS = core.js

lazy val laws = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .dependsOn(macros, kernel, core, kernelLaws)
  .settings(moduleName := "cats-laws", name := "Cats laws")
  .settings(catsSettings)
  .settings(disciplineDependencies)
  .settings(testingDependencies)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings)
  .jsSettings(coverageEnabled := false)

lazy val lawsJVM = laws.jvm
lazy val lawsJS = laws.js

lazy val free = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .dependsOn(macros, core, tests % "test-internal -> test")
  .settings(moduleName := "cats-free", name := "Cats Free")
  .settings(catsSettings)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings ++ mimaSettings("cats-free"))

lazy val freeJVM = free.jvm
lazy val freeJS = free.js

lazy val tests = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .dependsOn(testkit % "test")
  .settings(moduleName := "cats-tests")
  .settings(catsSettings)
  .settings(noPublishSettings)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings)

lazy val testsJVM = tests.jvm
lazy val testsJS = tests.js


lazy val testkit = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .dependsOn(macros, core, laws)
  .settings(moduleName := "cats-testkit")
  .settings(catsSettings)
  .settings(disciplineDependencies)
  // 2.13.0-M3 workaround
  //.settings(libraryDependencies += "org.scalatest" %%% "scalatest" % scalaTestVersion)
  .settings(libraryDependencies += "org.scalatest" %%% "scalatest" % scalatestVersion(scalaVersion.value))
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings)

lazy val testkitJVM = testkit.jvm
lazy val testkitJS = testkit.js

lazy val alleycatsCore = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .in(file("alleycats-core"))
  .dependsOn(core)
  .settings(moduleName := "alleycats-core", name := "Alleycats core")
  .settings(libraryDependencies ++= Seq(
    "org.typelevel" %% "export-hook" % "1.2.0"
  ))
  .settings(catsSettings)
  .settings(publishSettings)
  .settings(scoverageSettings)
  .settings(includeGeneratedSrc)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings)
  .settings(scalacOptions ~= {_.filterNot("-Ywarn-unused-import" == _)}) //export-hook triggers unused import


lazy val alleycatsCoreJVM = alleycatsCore.jvm
lazy val alleycatsCoreJS = alleycatsCore.js

lazy val alleycatsLaws = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .in(file("alleycats-laws"))
  .dependsOn(alleycatsCore, laws)
  .settings(moduleName := "alleycats-laws", name := "Alleycats laws")
  .settings(catsSettings)
  .settings(publishSettings)
  .settings(scoverageSettings)
  .settings(disciplineDependencies)
  .settings(testingDependencies)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings)
  .jsSettings(coverageEnabled := false)
  .dependsOn(alleycatsCore)

lazy val alleycatsLawsJVM = alleycatsLaws.jvm
lazy val alleycatsLawsJS = alleycatsLaws.js

lazy val alleycatsTests = crossProject(JSPlatform, JVMPlatform)
  .crossType(CrossType.Pure)
  .in(file("alleycats-tests"))
  .dependsOn(alleycatsLaws, testkit % "test")
  .settings(moduleName := "alleycats-tests")
  .settings(catsSettings)
  .settings(noPublishSettings)
  .jsSettings(commonJsSettings)
  .jvmSettings(commonJvmSettings)

lazy val alleycatsTestsJVM = alleycatsTests.jvm
lazy val alleycatsTestsJS = alleycatsTests.js


// bench is currently JVM-only

lazy val bench = project.dependsOn(macrosJVM, coreJVM, freeJVM, lawsJVM)
  .settings(moduleName := "cats-bench")
  .settings(catsSettings)
  .settings(noPublishSettings)
  .settings(commonJvmSettings)
  .settings(coverageEnabled := false)
  .settings(libraryDependencies ++= Seq(
    "org.scalaz" %% "scalaz-core" % "7.2.23"))
  .enablePlugins(JmhPlugin)

// cats-js is JS-only
lazy val js = project
  .dependsOn(macrosJS, coreJS, testsJS % "test-internal -> test")
  .settings(moduleName := "cats-js")
  .settings(catsSettings)
  .settings(commonJsSettings)
  .enablePlugins(ScalaJSPlugin)


// cats-jvm is JVM-only
lazy val jvm = project
  .dependsOn(macrosJVM, coreJVM, testsJVM % "test-internal -> test")
  .settings(moduleName := "cats-jvm")
  .settings(catsSettings)
  .settings(commonJvmSettings)

lazy val publishSettings = Seq(
  homepage := Some(url("https://github.com/typelevel/cats")),
  licenses := Seq("MIT" -> url("http://opensource.org/licenses/MIT")),
  scmInfo := Some(ScmInfo(url("https://github.com/typelevel/cats"), "scm:git:git@github.com:typelevel/cats.git")),
  autoAPIMappings := true,
  apiURL := Some(url("http://typelevel.org/cats/api/")),
  pomExtra := (
    <developers>
      <developer>
        <id>ceedubs</id>
        <name>Cody Allen</name>
        <url>https://github.com/ceedubs/</url>
      </developer>
      <developer>
        <id>rossabaker</id>
        <name>Ross Baker</name>
        <url>https://github.com/rossabaker/</url>
      </developer>
      <developer>
        <id>johnynek</id>
        <name>P. Oscar Boykin</name>
        <url>https://github.com/johnynek/</url>
      </developer>
      <developer>
        <id>travisbrown</id>
        <name>Travis Brown</name>
        <url>https://github.com/travisbrown/</url>
      </developer>
      <developer>
        <id>adelbertc</id>
        <name>Adelbert Chang</name>
        <url>https://github.com/adelbertc/</url>
      </developer>
      <developer>
        <id>peterneyens</id>
        <name>Peter Neyens</name>
        <url>https://github.com/peterneyens/</url>
      </developer>
      <developer>
        <id>tpolecat</id>
        <name>Rob Norris</name>
        <url>https://github.com/tpolecat/</url>
      </developer>
      <developer>
        <id>stew</id>
        <name>Mike O'Connor</name>
        <url>https://github.com/stew/</url>
      </developer>
      <developer>
        <id>non</id>
        <name>Erik Osheim</name>
        <url>https://github.com/non/</url>
      </developer>
      <developer>
        <id>LukaJCB</id>
        <name>LukaJCB</name>
        <url>https://github.com/LukaJCB/</url>
      </developer>
      <developer>
        <id>mpilquist</id>
        <name>Michael Pilquist</name>
        <url>https://github.com/mpilquist/</url>
      </developer>
      <developer>
        <id>milessabin</id>
        <name>Miles Sabin</name>
        <url>https://github.com/milessabin/</url>
      </developer>
      <developer>
        <id>djspiewak</id>
        <name>Daniel Spiewak</name>
        <url>https://github.com/djspiewak/</url>
      </developer>
      <developer>
        <id>fthomas</id>
        <name>Frank Thomas</name>
        <url>https://github.com/fthomas/</url>
      </developer>
      <developer>
        <id>julien-truffaut</id>
        <name>Julien Truffaut</name>
        <url>https://github.com/julien-truffaut/</url>
      </developer>
      <developer>
        <id>kailuowang</id>
        <name>Kailuo Wang</name>
        <url>https://github.com/kailuowang/</url>
      </developer>
    </developers>
  )
) ++ credentialSettings ++ sharedPublishSettings ++ sharedReleaseProcess

// These aliases serialise the build for the benefit of Travis-CI.

addCommandAlias("buildKernelJVM", ";kernelJVM/test;kernelLawsJVM/test")

addCommandAlias("buildCoreJVM", ";macrosJVM/test;coreJVM/test")

addCommandAlias("buildTestsJVM", ";lawsJVM/test;testkitJVM/test;testsJVM/test;jvm/test")

addCommandAlias("buildFreeJVM", ";freeJVM/test")

addCommandAlias("buildAlleycatsJVM", ";alleycatsCoreJVM/test;alleycatsLawsJVM/test;alleycatsTestsJVM/test")

addCommandAlias("buildJVM", ";buildKernelJVM;buildCoreJVM;buildTestsJVM;buildFreeJVM;buildAlleycatsJVM")

addCommandAlias("validateJVM", ";scalastyle;buildJVM;mimaReportBinaryIssues;makeMicrosite")

addCommandAlias("validateJS", ";catsJS/compile;testsJS/test;js/test")

addCommandAlias("validateKernelJS", "kernelLawsJS/test")

addCommandAlias("validateFreeJS", "freeJS/test") //separated due to memory constraint on travis

addCommandAlias("validate", ";clean;validateJS;validateKernelJS;validateFreeJS;validateJVM")

////////////////////////////////////////////////////////////////////////////////////////////////////
// Base Build Settings - Should not need to edit below this line.
// These settings could also come from another file or a plugin.
// The only issue if coming from a plugin is that the Macro lib versions
// are hard coded, so an overided facility would be required.

addCommandAlias("gitSnapshots", ";set version in ThisBuild := git.gitDescribedVersion.value.get + \"-SNAPSHOT\"")

lazy val noPublishSettings = Seq(
  publish := {},
  publishLocal := {},
  publishArtifact := false
)

lazy val crossVersionSharedSources: Seq[Setting[_]] =
  Seq(Compile, Test).map { sc =>
    (unmanagedSourceDirectories in sc) ++= {
      (unmanagedSourceDirectories in sc ).value.map {
        dir:File => new File(dir.getPath + "_" + scalaBinaryVersion.value)
      }
    }
  }

def commonScalacOptions(scalaVersion: String) = Seq(
  "-encoding", "UTF-8",
  "-feature",
  "-language:existentials",
  "-language:higherKinds",
  "-language:implicitConversions",
  "-language:experimental.macros",
  "-unchecked",
  "-Ywarn-dead-code",
  "-Ywarn-numeric-widen",
  "-Ywarn-value-discard",
  "-Xfuture"
) ++ (if(priorTo2_13(scalaVersion)) Seq(
  "-Yno-adapted-args",
  "-Xfatal-warnings", //todo: add the following two back to 2.13
  "-deprecation"
) else Seq(
  "-Ymacro-annotations"
))

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

lazy val sharedPublishSettings = Seq(
  releaseCrossBuild := true,
  releaseTagName := tagName.value,
  releasePublishArtifactsAction := PgpKeys.publishSigned.value,
  releaseVcsSign := true,
  useGpg := true,   // bouncycastle has bugs with subkeys, so we use gpg instead
  publishMavenStyle := true,
  publishArtifact in Test := false,
  pomIncludeRepository := Function.const(false),
  publishTo := {
    val nexus = "https://oss.sonatype.org/"
    if (isSnapshot.value)
      Some("Snapshots" at nexus + "content/repositories/snapshots")
    else
      Some("Releases" at nexus + "service/local/staging/deploy/maven2")
  }
)

lazy val sharedReleaseProcess = Seq(
  releaseProcess := Seq[ReleaseStep](
    checkSnapshotDependencies,
    inquireVersions,
    runClean,
    releaseStepCommand("validate"),
    setReleaseVersion,
    commitReleaseVersion,
    tagRelease,
    publishArtifacts,
    setNextVersion,
    commitNextVersion,
    releaseStepCommand("sonatypeReleaseAll"),
    pushChanges)
)

lazy val warnUnusedImport = Seq(
  scalacOptions ++= Seq("-Ywarn-unused-import"),
  scalacOptions in (Compile, console) ~= {_.filterNot("-Ywarn-unused-import" == _)},
  scalacOptions in (Test, console) := (scalacOptions in (Compile, console)).value
)

lazy val credentialSettings = Seq(
  // For Travis CI - see http://www.cakesolutions.net/teamblogs/publishing-artefacts-to-oss-sonatype-nexus-using-sbt-and-travis-ci
  credentials ++= (for {
    username <- Option(System.getenv().get("SONATYPE_USERNAME"))
    password <- Option(System.getenv().get("SONATYPE_PASSWORD"))
  } yield Credentials("Sonatype Nexus Repository Manager", "oss.sonatype.org", username, password)).toSeq
)


lazy val update2_12 = Seq(
  scalacOptions -= {
    CrossVersion.partialVersion(scalaVersion.value) match {
      case Some((2, scalaMajor)) if scalaMajor >= 12 => "-Yinline-warnings"
      case _ => ""
    }
  }
)

lazy val xlint = Seq(
  scalacOptions += {
    CrossVersion.partialVersion(scalaVersion.value) match {
      case Some((2, scalaMajor)) if scalaMajor >= 12 => "-Xlint:-unused,_"
      case _ => "-Xlint"
    }
  }
)