build.sbt

import com.typesafe.sbt.pgp.PgpKeys.publishSigned
import sbtrelease.Version

val ReleaseTag = """^release/([\d\.]+a?)$""".r

lazy val contributors = Seq(
  "pchiusano" -> "Paul Chiusano",
  "pchlupacek" -> "Pavel Chlupáček",
  "alissapajer" -> "Alissa Pajer",
  "djspiewak" -> "Daniel Spiewak",
  "fthomas" -> "Frank Thomas",
  "runarorama" -> "Rúnar Ó. Bjarnason",
  "jedws" -> "Jed Wesley-Smith",
  "mpilquist" -> "Michael Pilquist"
)

lazy val commonSettings = Seq(
  organization := "co.fs2",
  scalacOptions ++= Seq(
    "-feature",
    "-deprecation",
    "-language:implicitConversions",
    "-language:higherKinds",
    "-language:existentials",
    "-language:postfixOps",
    "-Ypartial-unification"
  ) ++
    (if (scalaBinaryVersion.value startsWith "2.12") List(
      "-Xlint",
      "-Xfatal-warnings",
      "-Yno-adapted-args",
      "-Ywarn-value-discard",
      "-Ywarn-unused-import"
    ) else Nil) ++ (if (scalaBinaryVersion.value startsWith "2.11") List("-Xexperimental") else Nil), // 2.11 needs -Xexperimental to enable SAM conversion
  scalacOptions in (Compile, console) ~= {_.filterNot("-Ywarn-unused-import" == _).filterNot("-Xlint" == _).filterNot("-Xfatal-warnings" == _)},
  scalacOptions in (Compile, console) += "-Ydelambdafy:inline",
  scalacOptions in (Test, console) := (scalacOptions in (Compile, console)).value,
  libraryDependencies ++= Seq(
    compilerPlugin("org.spire-math" %% "kind-projector" % "0.9.4"),
    "org.scalatest" %%% "scalatest" % "3.0.3" % "test",
    "org.scalacheck" %%% "scalacheck" % "1.13.5" % "test"
  ),
  scmInfo := Some(ScmInfo(url("https://github.com/functional-streams-for-scala/fs2"), "git@github.com:functional-streams-for-scala/fs2.git")),
  homepage := Some(url("https://github.com/functional-streams-for-scala/fs2")),
  licenses += ("MIT", url("http://opensource.org/licenses/MIT")),
  initialCommands := s"""
    import fs2._
    import cats.effect.IO
    import scala.concurrent.ExecutionContext.Implicits.global
  """,
  doctestWithDependencies := false,
  doctestTestFramework := DoctestTestFramework.ScalaTest
) ++ testSettings ++ scaladocSettings ++ publishingSettings ++ releaseSettings

lazy val testSettings = Seq(
  parallelExecution in Test := false,
  testOptions in Test += Tests.Argument(TestFrameworks.ScalaTest, "-oDF"),
  publishArtifact in Test := true
)

def scmBranch(v: String): String = {
  val Some(ver) = Version(v)
  if(ver.qualifier.exists(_ == "-SNAPSHOT"))
    // support branch (0.9.0-SNAPSHOT -> series/0.9)
    s"series/${ver.copy(subversions = ver.subversions.take(1), qualifier = None).string}"
  else
    // release tag (0.9.0-M2 -> v0.9.0-M2)
    s"v${ver.string}"
}

lazy val scaladocSettings = Seq(
  scalacOptions in (Compile, doc) ++= Seq(
    "-doc-source-url", s"${scmInfo.value.get.browseUrl}/tree/${scmBranch(version.value)}€{FILE_PATH}.scala",
    "-sourcepath", baseDirectory.in(LocalRootProject).value.getAbsolutePath,
    "-implicits",
    "-implicits-sound-shadowing",
    "-implicits-show-all"
  ),
  scalacOptions in (Compile, doc) ~= { _ filterNot { _ == "-Xfatal-warnings" } },
  autoAPIMappings := true
)

lazy val publishingSettings = Seq(
  publishTo := {
    val nexus = "https://oss.sonatype.org/"
    if (version.value.trim.endsWith("SNAPSHOT"))
      Some("snapshots" at nexus + "content/repositories/snapshots")
    else
      Some("releases" at nexus + "service/local/staging/deploy/maven2")
  },
  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,
  publishMavenStyle := true,
  pomIncludeRepository := { _ => false },
  pomExtra := {
    <developers>
      {for ((username, name) <- contributors) yield
      <developer>
        <id>{username}</id>
        <name>{name}</name>
        <url>http://github.com/{username}</url>
      </developer>
      }
    </developers>
  },
  pomPostProcess := { node =>
    import scala.xml._
    import scala.xml.transform._
    def stripIf(f: Node => Boolean) = new RewriteRule {
      override def transform(n: Node) =
        if (f(n)) NodeSeq.Empty else n
    }
    val stripTestScope = stripIf { n => n.label == "dependency" && (n \ "scope").text == "test" }
    new RuleTransformer(stripTestScope).transform(node)(0)
  }
)

lazy val commonJsSettings = Seq(
  scalaJSOptimizerOptions ~= { options =>
    // https://github.com/scala-js/scala-js/issues/2798
    try {
      scala.util.Properties.isJavaAtLeast("1.8")
      options
    } catch {
      case _: NumberFormatException =>
        options.withParallel(false)
    }
  },
  requiresDOM := false,
  scalaJSStage in Test := FastOptStage,
  jsEnv := new org.scalajs.jsenv.nodejs.NodeJSEnv(),
  scalacOptions in Compile += {
    val dir = project.base.toURI.toString.replaceFirst("[^/]+/?$", "")
    val url = "https://raw.githubusercontent.com/functional-streams-for-scala/fs2"
    s"-P:scalajs:mapSourceURI:$dir->$url/${scmBranch(version.value)}/"
  }
)

lazy val noPublish = Seq(
  publish := (),
  publishLocal := (),
  publishSigned := (),
  publishArtifact := false
)

lazy val releaseSettings = Seq(
  releaseCrossBuild := true,
  releasePublishArtifactsAction := PgpKeys.publishSigned.value
)

lazy val mimaSettings = Seq(
  mimaPreviousArtifacts := previousVersion(version.value).map { pv =>
    organization.value % (normalizedName.value + "_" + scalaBinaryVersion.value) % pv
  }.toSet,
  mimaBinaryIssueFilters ++= Seq(
  )
)

def previousVersion(currentVersion: String): Option[String] = {
  val Version = """(\d+)\.(\d+)\.(\d+).*""".r
  val Version(x, y, z) = currentVersion
  if (z == "0") None
  else Some(s"$x.$y.${z.toInt - 1}")
}


lazy val root = project.in(file(".")).
  settings(commonSettings).
  settings(noPublish).
  aggregate(coreJVM, coreJS, io, scodecJVM, scodecJS, benchmark)

lazy val core = crossProject.in(file("core")).
  settings(commonSettings: _*).
  settings(
    name := "fs2-core",
    libraryDependencies += "org.typelevel" %%% "cats-effect" % "0.4"
  ).
  jsSettings(commonJsSettings: _*)

lazy val coreJVM = core.jvm.enablePlugins(SbtOsgi).
  settings(
    OsgiKeys.exportPackage := Seq("fs2.*"),
    OsgiKeys.privatePackage := Seq(),
    OsgiKeys.importPackage := Seq("""scala.*;version="${range;[==,=+)}"""", "*"),
    OsgiKeys.additionalHeaders := Map("-removeheaders" -> "Include-Resource,Private-Package"),
    osgiSettings
  ).
  settings(mimaSettings)
lazy val coreJS = core.js.disablePlugins(DoctestPlugin, MimaPlugin)

lazy val io = project.in(file("io")).
  enablePlugins(SbtOsgi).
  settings(commonSettings).
  settings(mimaSettings).
  settings(
    name := "fs2-io",
    OsgiKeys.exportPackage := Seq("fs2.io.*"),
    OsgiKeys.privatePackage := Seq(),
    OsgiKeys.importPackage := Seq("""scala.*;version="${range;[==,=+)}"""", """fs2.*;version="${Bundle-Version}"""", "*"),
    OsgiKeys.additionalHeaders := Map("-removeheaders" -> "Include-Resource,Private-Package"),
    osgiSettings
  ).dependsOn(coreJVM % "compile->compile;test->test")

lazy val scodec = crossProject.in(file("scodec")).
  settings(commonSettings).
  settings(
    name := "fs2-scodec",
    libraryDependencies += "org.scodec" %%% "scodec-bits" % "1.1.5"
  ).dependsOn(core % "compile->compile;test->test")
  .jsSettings(commonJsSettings: _*)

lazy val scodecJVM = scodec.jvm.
  enablePlugins(SbtOsgi).
  settings(mimaSettings).
  settings(
    OsgiKeys.exportPackage := Seq("fs2.interop.scodec.*"),
    OsgiKeys.privatePackage := Seq(),
    OsgiKeys.importPackage := Seq("""scala.*;version="${range;[==,=+)}"""", """fs2.*;version="${Bundle-Version}"""", "*"),
    OsgiKeys.additionalHeaders := Map("-removeheaders" -> "Include-Resource,Private-Package"),
    osgiSettings
  )
lazy val scodecJS = scodec.js.disablePlugins(DoctestPlugin, MimaPlugin)

lazy val benchmarkMacros = project.in(file("benchmark-macros")).
  disablePlugins(MimaPlugin).
  settings(commonSettings).
  settings(noPublish).
  settings(
    name := "fs2-benchmark-macros",
    addCompilerPlugin("org.scalamacros" % "paradise" % "2.1.1" cross CrossVersion.patch),
    libraryDependencies += scalaOrganization.value % "scala-reflect" % scalaVersion.value
  )

lazy val benchmark = project.in(file("benchmark")).
  disablePlugins(MimaPlugin).
  settings(commonSettings).
  settings(noPublish).
  settings(
    name := "fs2-benchmark"
  )
  .settings(
    addCompilerPlugin("org.scalamacros" % "paradise" % "2.1.1" cross CrossVersion.patch),
    libraryDependencies += scalaOrganization.value % "scala-reflect" % scalaVersion.value
  )
  .enablePlugins(JmhPlugin)
  .dependsOn(io, benchmarkMacros)

lazy val docs = project.in(file("docs")).
  enablePlugins(TutPlugin).
  settings(commonSettings).
  settings(
    name := "fs2-docs",
    tutSourceDirectory := file("docs") / "src",
    tutTargetDirectory := file("docs"),
    scalacOptions ~= {_.filterNot("-Ywarn-unused-import" == _)}
  ).dependsOn(coreJVM, io)