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",
  scalaVersion := "2.11.8",
  crossScalaVersions := Seq("2.11.8", "2.12.0-RC2"),
  scalacOptions ++= Seq(
    "-feature",
    "-deprecation",
    "-language:implicitConversions",
    "-language:higherKinds",
    "-language:existentials",
    "-language:postfixOps",
    "-Xfatal-warnings",
    "-Yno-adapted-args",
    // "-Ywarn-dead-code", // Too buggy to be useful, for instance https://issues.scala-lang.org/browse/SI-9521
    "-Ywarn-value-discard",
    "-Ywarn-unused-import"
  ),
  scalacOptions in (Compile, console) ~= {_.filterNot("-Ywarn-unused-import" == _)},
  scalacOptions in (Test, console) <<= (scalacOptions in (Compile, console)),
  libraryDependencies ++= Seq(
    "org.scalatest" %%% "scalatest" % "3.0.0" % "test",
    "org.scalacheck" %%% "scalacheck" % "1.13.2" % "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 fs2.util._
  """,
  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"),
  // fork in Test := true, Causes issues on Travis
  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/${ver.copy(bugfix = None, qualifier = None).string}"
  else
    // release tag (0.9.0-M2 -> v0.9.0-M2)
    s"v${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-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(
  requiresDOM := false,
  scalaJSStage in Test := FastOptStage,
  jsEnv in Test := NodeJSEnv().value,
  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, benchmark)

lazy val core = crossProject.in(file("core")).
  settings(commonSettings: _*).
  settings(
    name := "fs2-core"
  ).
  jsSettings(commonJsSettings: _*)

lazy val coreJVM = core.jvm.settings(mimaSettings)
lazy val coreJS = core.js.disablePlugins(DoctestPlugin, MimaPlugin)

lazy val io = project.in(file("io")).
  settings(commonSettings).
  settings(mimaSettings).
  settings(
    name := "fs2-io"
  ).dependsOn(coreJVM % "compile->compile;test->test")

lazy val benchmarkMacros = project.in(file("benchmark-macros")).
  disablePlugins(MimaPlugin).
  settings(commonSettings).
  settings(noPublish).
  settings(
    name := "fs2-benchmark-macros",
    addCompilerPlugin("org.scalamacros" % "paradise" % "2.1.0" cross CrossVersion.full),
    libraryDependencies <+= scalaVersion("org.scala-lang" % "scala-reflect" % _)
  )

lazy val benchmark = project.in(file("benchmark")).
  disablePlugins(MimaPlugin).
  settings(commonSettings).
  settings(noPublish).
  settings(
    name := "fs2-benchmark"
  )
  .settings(
    addCompilerPlugin("org.scalamacros" % "paradise" % "2.1.0" cross CrossVersion.full),
    libraryDependencies <+= scalaVersion("org.scala-lang" % "scala-reflect" % _)
  )
  .enablePlugins(JmhPlugin)
  .dependsOn(io, benchmarkMacros)

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