build.sc

import $file.ci.shared
import $file.ci.upload
import java.nio.file.attribute.PosixFilePermission
import $ivy.`org.scalaj::scalaj-http:2.4.1`

import coursier.maven.MavenRepository
import mill._
import mill.scalalib._
import publish._
import mill.modules.Jvm.createAssembly

object Deps {

  object Scalajs_0_6 {
    val scalajsJsEnvs =  ivy"org.scala-js::scalajs-js-envs:0.6.22"
    val scalajsSbtTestAdapter =  ivy"org.scala-js::scalajs-sbt-test-adapter:0.6.22"
    val scalajsTools = ivy"org.scala-js::scalajs-tools:0.6.22"
  }

  object Scalajs_1_0 {
    val scalajsEnvJsdomNodejs =  ivy"org.scala-js::scalajs-env-jsdom-nodejs:1.0.0-M2"
    val scalajsEnvNodejs =  ivy"org.scala-js::scalajs-env-nodejs:1.0.0-M2"
    val scalajsEnvPhantomjs =  ivy"org.scala-js::scalajs-env-phantomjs:1.0.0-M2"
    val scalajsSbtTestAdapter = ivy"org.scala-js::scalajs-sbt-test-adapter:1.0.0-M2"
    val scalajsTools = ivy"org.scala-js::scalajs-tools:1.0.0-M2"
  }

  val acyclic = ivy"com.lihaoyi::acyclic:0.1.7"
  val ammonite = ivy"com.lihaoyi:::ammonite:1.6.9"
  val bloopConfig = ivy"ch.epfl.scala::bloop-config:1.2.5"
  val flywayCore = ivy"org.flywaydb:flyway-core:6.0.1"
  val graphvizJava = ivy"guru.nidi:graphviz-java:0.8.3"
  val ipcsocket = ivy"org.scala-sbt.ipcsocket:ipcsocket:1.0.0"
  val ipcsocketExcludingJna = ipcsocket.exclude(
  "net.java.dev.jna" -> "jna",
  "net.java.dev.jna" -> "jna-platform"
  )
  val javaxServlet = ivy"org.eclipse.jetty.orbit:javax.servlet:3.0.0.v201112011016"
  val jettyServer = ivy"org.eclipse.jetty:jetty-server:8.1.16.v20140903"
  val jettyWebsocket =  ivy"org.eclipse.jetty:jetty-websocket:8.1.16.v20140903"
  val jgraphtCore = ivy"org.jgrapht:jgrapht-core:1.3.0"
  val jna = ivy"net.java.dev.jna:jna:4.5.0"
  val jnaPlatform = ivy"net.java.dev.jna:jna-platform:4.5.0"
  val junitInterface = ivy"com.novocode:junit-interface:0.11"
  val osLib = ivy"com.lihaoyi::os-lib:0.2.6"
  val testng = ivy"org.testng:testng:6.11"
  val sbtTestInterface = ivy"org.scala-sbt:test-interface:1.0"
  def scalaCompiler(scalaVersion: String) = ivy"org.scala-lang:scala-compiler:${scalaVersion}"
  val scalafmtDynamic = ivy"org.scalameta::scalafmt-dynamic:2.0.0-RC6"
  def scalaReflect(scalaVersion: String) = ivy"org.scala-lang:scala-reflect:${scalaVersion}"
  val sourcecode = ivy"com.lihaoyi::sourcecode:0.1.4"
  val ujsonCirce = ivy"com.lihaoyi::ujson-circe:0.7.4"
  val upickle = ivy"com.lihaoyi::upickle:0.7.1"
  val utest = ivy"com.lihaoyi::utest:0.6.4"
  val zinc = ivy"org.scala-sbt::zinc:1.2.5"
}

trait MillPublishModule extends PublishModule{

  def artifactName = "mill-" + super.artifactName()
  def publishVersion = build.publishVersion()._2

  def pomSettings = PomSettings(
    description = artifactName(),
    organization = "com.lihaoyi",
    url = "https://github.com/lihaoyi/mill",
    licenses = Seq(License.MIT),
    versionControl = VersionControl.github("lihaoyi", "mill"),
    developers = Seq(
      Developer("lihaoyi", "Li Haoyi","https://github.com/lihaoyi")
    )
  )

  def javacOptions = Seq("-source", "1.8", "-target", "1.8")
}
trait MillApiModule extends MillPublishModule with ScalaModule{
  def scalaVersion = T{ "2.12.8" }
  def compileIvyDeps = Agg(Deps.acyclic)
  def scalacOptions = Seq("-P:acyclic:force")
  def scalacPluginIvyDeps = Agg(Deps.acyclic)
  def repositories = super.repositories ++ Seq(
    MavenRepository("https://oss.sonatype.org/content/repositories/releases")
  )
}
trait MillModule extends MillApiModule { outer =>
  def scalacPluginClasspath =
    super.scalacPluginClasspath() ++ Seq(main.moduledefs.jar())

  def testArgs = T{ Seq.empty[String] }

  val test = new Tests(implicitly)
  class Tests(ctx0: mill.define.Ctx) extends mill.Module()(ctx0) with super.Tests{
    def repositories = super.repositories ++ Seq(
      MavenRepository("https://oss.sonatype.org/content/repositories/releases")
    )
    def forkArgs = T{ testArgs() }
    def moduleDeps =
      if (this == main.test) Seq(main)
      else Seq(outer, main.test)
    def ivyDeps = Agg(Deps.utest)
    def testFrameworks = Seq("mill.UTestFramework")
    def scalacPluginClasspath =
      super.scalacPluginClasspath() ++ Seq(main.moduledefs.jar())
  }
}


object main extends MillModule {
  def moduleDeps = Seq(core, client)

  def compileIvyDeps = Agg(
    Deps.scalaReflect(scalaVersion())
  )

  def generatedSources = T {
    Seq(PathRef(shared.generateCoreSources(T.ctx().dest)))
  }
  def testArgs = Seq(
    "-DMILL_VERSION=" + build.publishVersion()._2,
  )
  val test = new Tests(implicitly)
  class Tests(ctx0: mill.define.Ctx) extends super.Tests(ctx0){
    def generatedSources = T {
      Seq(PathRef(shared.generateCoreTestSources(T.ctx().dest)))
    }
  }
  object api extends MillApiModule{
    def ivyDeps = Agg(
      Deps.osLib,
      Deps.upickle
    )
  }
  object core extends MillModule {
    def moduleDeps = Seq(moduledefs, api)

    def compileIvyDeps = Agg(
      Deps.scalaReflect(scalaVersion())
    )

    def ivyDeps = Agg(
      Deps.ammonite,
      // Necessary so we can share the JNA classes throughout the build process
      Deps.jna,
      Deps.jnaPlatform
    )

    def generatedSources = T {
      val dest = T.ctx().dest
      val version = publishVersion()
      writeBuildInfo(dest, version)
      shared.generateCoreSources(dest)
      Seq(PathRef(dest))
    }

    def writeBuildInfo(dir : os.Path, version : String) = {
      val code = s"""
        |package mill
        |
        |object BuildInfo {
        |  val millVersion = "$version"
        |}
      """.stripMargin.trim

      os.write(dir / "BuildInfo.scala", code)
    }
  }

  object moduledefs extends MillPublishModule with ScalaModule{
    def scalaVersion = T{ "2.12.8" }
    def ivyDeps = Agg(
      Deps.scalaCompiler(scalaVersion()),
      Deps.sourcecode,
    )
  }

  object client extends MillPublishModule{
    def ivyDeps = Agg(
      Deps.ipcsocketExcludingJna
    )
    object test extends Tests{
      def testFrameworks = Seq("com.novocode.junit.JUnitFramework")
      def ivyDeps = Agg(Deps.junitInterface)
    }
  }

  object graphviz extends MillModule{
    def moduleDeps = Seq(main, scalalib)

    def ivyDeps = Agg(
      Deps.graphvizJava,
      Deps.jgraphtCore
    )
    def testArgs = Seq(
      "-DMILL_GRAPHVIZ=" + runClasspath().map(_.path).mkString(",")
    )
  }
}


object scalalib extends MillModule {
  def moduleDeps = Seq(main, scalalib.api)

  def ivyDeps = Agg(
    Deps.sbtTestInterface,
    Deps.scalafmtDynamic
  )

  def genTask(m: ScalaModule) = T.task{
    Seq(m.jar(), m.sourceJar()) ++
    m.runClasspath()
  }

  override def generatedSources = T{
    val dest = T.ctx().dest
    os.write(dest / "Versions.scala",
      s"""package mill.scalalib
        |
        |/**
        | * Dependency versions.
        | * Generated from mill in build.sc.
        | */
        |object Versions {
        |  /** Version of Ammonite. */
        |  val ammonite = "${Deps.ammonite.dep.version}"
        |  /** Version of Zinc. */
        |  val zinc = "${Deps.zinc.dep.version}"
        |}
        |
        |""".stripMargin)
    super.generatedSources() ++ Seq(PathRef(dest))
  }

  def testArgs = T{
    val genIdeaArgs =
      genTask(main.moduledefs)() ++
      genTask(main.core)() ++
      genTask(main)() ++
      genTask(scalalib)() ++
      genTask(scalajslib)() ++
      genTask(scalanativelib)()

    worker.testArgs() ++
    main.graphviz.testArgs() ++
    Seq(
      "-Djna.nosys=true",
      "-DMILL_BUILD_LIBRARIES=" + genIdeaArgs.map(_.path).mkString(","),
      "-DMILL_SCALA_LIB=" + runClasspath().map(_.path).mkString(",")
    )
  }
  object backgroundwrapper extends MillPublishModule{
    def ivyDeps = Agg(
      Deps.sbtTestInterface
    )
    def testArgs = T{
      Seq(
        "-DMILL_BACKGROUNDWRAPPER=" + runClasspath().map(_.path).mkString(",")
      )
    }
  }
  object api extends MillApiModule {
    def moduleDeps = Seq(main.api)
  }
  object worker extends MillApiModule{

    def moduleDeps = Seq(scalalib.api)

    def ivyDeps = Agg(
      Deps.zinc
    )
    def testArgs = T{Seq(
      "-DMILL_SCALA_WORKER=" + runClasspath().map(_.path).mkString(",")
    )}
  }
}


object scalajslib extends MillModule {

  def moduleDeps = Seq(scalalib, scalajslib.api)

  def testArgs = T{
    val mapping = Map(
      "MILL_SCALAJS_WORKER_0_6" -> worker("0.6").compile().classes.path,
      "MILL_SCALAJS_WORKER_1_0" -> worker("1.0").compile().classes.path
    )
    Seq("-Djna.nosys=true") ++
    scalalib.worker.testArgs() ++
    scalalib.backgroundwrapper.testArgs() ++
    (for((k, v) <- mapping.toSeq) yield s"-D$k=$v")
  }

  object api extends MillApiModule{
    def moduleDeps = Seq(main.core)
    def ivyDeps = Agg(Deps.sbtTestInterface)
  }
  object worker extends Cross[WorkerModule]("0.6", "1.0")
  class WorkerModule(scalajsBinary: String) extends MillApiModule{
    def moduleDeps = Seq(scalajslib.api)
    def ivyDeps = scalajsBinary match {
      case "0.6" =>
        Agg(
          Deps.Scalajs_0_6.scalajsTools,
          Deps.Scalajs_0_6.scalajsSbtTestAdapter,
          Deps.Scalajs_0_6.scalajsJsEnvs,
          Deps.jettyWebsocket,
          Deps.jettyServer,
          Deps.javaxServlet
        )
      case "1.0" =>
        Agg(
          Deps.Scalajs_1_0.scalajsTools,
          Deps.Scalajs_1_0.scalajsSbtTestAdapter,
          Deps.Scalajs_1_0.scalajsEnvNodejs,
          Deps.Scalajs_1_0.scalajsEnvJsdomNodejs,
          Deps.Scalajs_1_0.scalajsEnvPhantomjs,
          Deps.jettyWebsocket,
          Deps.jettyServer,
          Deps.javaxServlet
        )
    }
  }
}


object contrib extends MillModule {
  object testng extends MillPublishModule{
    def ivyDeps = Agg(
      Deps.sbtTestInterface,
      Deps.testng
    )
  }

  object twirllib extends MillModule {
    def moduleDeps = Seq(scalalib)
  }

  object playlib extends MillModule {
    def moduleDeps = Seq(scalalib, twirllib, playlib.api)

    def testArgs = T {
      val mapping = Map(
        "MILL_CONTRIB_PLAYLIB_ROUTECOMPILER_WORKER_2_6" -> worker("2.6").compile().classes.path,
        "MILL_CONTRIB_PLAYLIB_ROUTECOMPILER_WORKER_2_7" -> worker("2.7").compile().classes.path
      )

      scalalib.worker.testArgs() ++
        scalalib.backgroundwrapper.testArgs() ++
        (for ((k, v) <- mapping.toSeq) yield s"-D$k=$v")
    }

    object api extends MillApiModule {
      def moduleDeps = Seq(scalalib)
    }
    object worker extends Cross[WorkerModule]( "2.6", "2.7")

    class WorkerModule(scalajsBinary: String) extends MillApiModule {
      def moduleDeps = Seq(playlib.api)

      def ivyDeps = scalajsBinary match {
        case  "2.6"=>
          Agg(
            ivy"com.typesafe.play::routes-compiler::2.6.0"
          )
        case "2.7" =>
          Agg(
            ivy"com.typesafe.play::routes-compiler::2.7.0"
          )
      }
    }

  }

  object scalapblib extends MillModule {
    def moduleDeps = Seq(scalalib)
  }

  object scoverage extends MillModule {
    def moduleDeps = Seq(scalalib, scoverage.api)

    def testArgs = T {
      val mapping = Map(
        "MILL_SCOVERAGE_REPORT_WORKER_1_3_1" -> worker("1.3.1").compile().classes.path,
        "MILL_SCOVERAGE_REPORT_WORKER_1_4_0" -> worker("1.4.0").compile().classes.path
      )
      scalalib.worker.testArgs() ++
        scalalib.backgroundwrapper.testArgs() ++
        (for ((k, v) <- mapping) yield s"-D$k=$v")
    }

    // So we can test with buildinfo in the classpath
    val test = new Tests(implicitly)
    class Tests(ctx0: mill.define.Ctx) extends super.Tests(ctx0) {
      override def moduleDeps = super.moduleDeps :+ contrib.buildinfo
    }

    object api extends MillApiModule {
      def moduleDeps = Seq(scalalib)
    }

    object worker extends Cross[WorkerModule]("1.3.1", "1.4.0")

    class WorkerModule(scoverageVersion: String) extends MillApiModule {
      def moduleDeps = Seq(scoverage.api)

      def ivyDeps = Agg(ivy"org.scoverage::scalac-scoverage-plugin:${scoverageVersion}")
    }
  }

  object buildinfo extends MillModule {
    def moduleDeps = Seq(scalalib)
    // why do I need this?
    def testArgs = T{
      Seq("-Djna.nosys=true") ++
      scalalib.worker.testArgs() ++
      scalalib.backgroundwrapper.testArgs()
    }
   }

  object tut extends MillModule {
    def moduleDeps = Seq(scalalib)
    def testArgs = Seq("-DMILL_VERSION=" + build.publishVersion()._2)
  }

  object flyway extends MillModule {
    def moduleDeps = Seq(scalalib)
    def ivyDeps = Agg(Deps.flywayCore)
  }


  object docker extends MillModule {
    def moduleDeps = Seq(scalalib)
  }

  object bloop extends MillModule {
    def moduleDeps = Seq(scalalib, scalajslib, scalanativelib)
    def ivyDeps = Agg(
      Deps.bloopConfig,
      Deps.ujsonCirce
    )
    def testArgs = T(scalanativelib.testArgs())
  }
}


object scalanativelib extends MillModule {
  def moduleDeps = Seq(scalalib, scalanativelib.api)

  def scalacOptions = Seq[String]() // disable -P:acyclic:force

  def testArgs = T{
    val mapping = Map(
      "MILL_SCALANATIVE_WORKER_0_3" ->
        worker("0.3").runClasspath()
          .map(_.path)
          .filter(_.toIO.exists)
          .mkString(",")
    )
    scalalib.worker.testArgs() ++
    scalalib.backgroundwrapper.testArgs() ++
    (for((k, v) <- mapping.toSeq) yield s"-D$k=$v")
  }
  object api extends MillApiModule{
    def moduleDeps = Seq(main.core)
    def ivyDeps = Agg(Deps.sbtTestInterface)
  }
  object worker extends Cross[WorkerModule]("0.3")
  class WorkerModule(scalaNativeBinary: String) extends MillApiModule {
    def scalaNativeVersion = T{ "0.3.8" }
    def moduleDeps = Seq(scalanativelib.api)
    def ivyDeps = scalaNativeBinary match {
      case "0.3" =>
        Agg(
          ivy"org.scala-native::tools:${scalaNativeVersion()}",
          ivy"org.scala-native::util:${scalaNativeVersion()}",
          ivy"org.scala-native::nir:${scalaNativeVersion()}",
          ivy"org.scala-native::nir:${scalaNativeVersion()}",
          ivy"org.scala-native::test-runner:${scalaNativeVersion()}",
        )
    }
  }
}

def testRepos = T{
  Seq(
    "MILL_ACYCLIC_REPO" ->
      shared.downloadTestRepo("lihaoyi/acyclic", "bc41cd09a287e2c270271e27ccdb3066173a8598", T.ctx().dest/"acyclic"),
    "MILL_JAWN_REPO" ->
      shared.downloadTestRepo("non/jawn", "fd8dc2b41ce70269889320aeabf8614fe1e8fbcb", T.ctx().dest/"jawn"),
    "MILL_BETTERFILES_REPO" ->
      shared.downloadTestRepo("pathikrit/better-files", "ba74ae9ef784dcf37f1b22c3990037a4fcc6b5f8", T.ctx().dest/"better-files"),
    "MILL_AMMONITE_REPO" ->
      shared.downloadTestRepo("lihaoyi/ammonite", "26b7ebcace16b4b5b4b68f9344ea6f6f48d9b53e", T.ctx().dest/"ammonite"),
    "MILL_UPICKLE_REPO" ->
      shared.downloadTestRepo("lihaoyi/upickle", "7f33085c890db7550a226c349832eabc3cd18769", T.ctx().dest/"upickle"),
    "MILL_PLAY_JSON_REPO" ->
      shared.downloadTestRepo("playframework/play-json", "0a5ba16a03f3b343ac335117eb314e7713366fd4", T.ctx().dest/"play-json"),
    "MILL_CAFFEINE_REPO" ->
      shared.downloadTestRepo("ben-manes/caffeine", "c02c623aedded8174030596989769c2fecb82fe4", T.ctx().dest/"caffeine")
  )
}

object integration extends MillModule {
  def moduleDeps = Seq(main.moduledefs, scalalib, scalajslib, scalanativelib)
  def testArgs = T{
    scalajslib.testArgs() ++
    scalalib.worker.testArgs() ++
    scalalib.backgroundwrapper.testArgs() ++
    scalanativelib.testArgs() ++
    Seq(
      "-DMILL_TESTNG=" + contrib.testng.runClasspath().map(_.path).mkString(","),
      "-DMILL_VERSION=" + build.publishVersion()._2,
      "-DMILL_SCALA_LIB=" + scalalib.runClasspath().map(_.path).mkString(","),
      "-Djna.nosys=true"
    ) ++
    (for((k, v) <- testRepos()) yield s"-D$k=$v")
  }
  def forkArgs = testArgs()
}


def launcherScript(shellJvmArgs: Seq[String],
                   cmdJvmArgs: Seq[String],
                   shellClassPath: Agg[String],
                   cmdClassPath: Agg[String]) = {
  mill.modules.Jvm.universalScript(
    shellCommands = {
      val jvmArgsStr = shellJvmArgs.mkString(" ")
      def java(mainClass: String) =
        s"""exec $$JAVACMD $jvmArgsStr $$JAVA_OPTS -cp "${shellClassPath.mkString(":")}" $mainClass "$$@""""

      s"""if [ -z "$$JAVA_HOME" ] ; then
         |  JAVACMD="java"
         |else
         |  JAVACMD="$$JAVA_HOME/bin/java"
         |fi
         |case "$$1" in
         |  -i | --interactive )
         |    ${java("mill.MillMain")}
         |    ;;
         |  *)
         |    ${java("mill.main.client.MillClientMain")}
         |    ;;
         |esac""".stripMargin
    },
    cmdCommands = {
      val jvmArgsStr = cmdJvmArgs.mkString(" ")
      def java(mainClass: String) =
        s""""%JAVACMD%" $jvmArgsStr %JAVA_OPTS% -cp "${cmdClassPath.mkString(";")}" $mainClass %*"""

      s"""set "JAVACMD=java.exe"
         |if not "%JAVA_HOME%"=="" set "JAVACMD=%JAVA_HOME%\\bin\\java.exe"
         |if "%1" == "-i" set _I_=true
         |if "%1" == "--interactive" set _I_=true
         |if defined _I_ (
         |  ${java("mill.MillMain")}
         |) else (
         |  ${java("mill.main.client.MillClientMain")}
         |)""".stripMargin
    }
  )
}

object dev extends MillModule{
  def moduleDeps = Seq(scalalib, scalajslib, scalanativelib, contrib.scalapblib, contrib.tut, contrib.scoverage)


  def forkArgs =
    (
      scalalib.testArgs() ++
      scalajslib.testArgs() ++
      scalalib.worker.testArgs() ++
      scalanativelib.testArgs() ++
      scalalib.backgroundwrapper.testArgs() ++
      // Workaround for Zinc/JNA bug
      // https://github.com/sbt/sbt/blame/6718803ee6023ab041b045a6988fafcfae9d15b5/main/src/main/scala/sbt/Main.scala#L130
      Seq(
        "-Djna.nosys=true",
        "-DMILL_VERSION=" + build.publishVersion()._2,
        "-DMILL_CLASSPATH=" + runClasspath().map(_.path.toString).mkString(",")
      )
    ).distinct


  // Pass dev.assembly VM options via file in Windows due to small max args limit
  def windowsVmOptions(taskName: String, batch: os.Path, args: Seq[String])
                      (implicit ctx: mill.util.Ctx) = {
    if (System.getProperty("java.specification.version").startsWith("1.")) {
      throw new Error(s"$taskName in Windows is only supported using Java 9 or above")
    }
    val vmOptionsFile = T.ctx().dest / "mill.vmoptions"
    T.ctx().log.info(s"Generated $vmOptionsFile; it should be kept in the same directory as $taskName's ${batch.last}")
    os.write(vmOptionsFile, args.mkString("\r\n"))
  }

  def launcher = T{
    val isWin = scala.util.Properties.isWin
    val outputPath = T.ctx().dest / (if (isWin) "run.bat" else "run")

    os.write(outputPath, prependShellScript())

    if (isWin) {
      windowsVmOptions("dev.launcher", outputPath, forkArgs())
    } else {
      os.perms.set(outputPath, "rwxrwxrwx")
    }
    PathRef(outputPath)
  }

  def assembly = T{
    val isWin = scala.util.Properties.isWin
    val millPath = T.ctx().dest / (if (isWin) "mill.bat" else "mill")
    os.move(super.assembly().path, millPath)
    if (isWin) windowsVmOptions("dev.launcher", millPath, forkArgs())
    PathRef(millPath)
  }

  def prependShellScript = T{
    val classpath = runClasspath().map(_.path.toString)
    val args = forkArgs()
    val (shellArgs, cmdArgs) =
      if (!scala.util.Properties.isWin) (
        args,
        args
      )
      else (
        Seq("""-XX:VMOptionsFile="$( dirname "$0" )"/mill.vmoptions"""),
        Seq("""-XX:VMOptionsFile=%~dp0\mill.vmoptions""")
      )
    launcherScript(
      shellArgs,
      cmdArgs,
      classpath,
      classpath
    )
  }

  def run(args: String*) = T.command{
    args match{
      case Nil => mill.eval.Result.Failure("Need to pass in cwd as first argument to dev.run")
      case wd0 +: rest =>
        val wd = os.Path(wd0, os.pwd)
        os.makeDir.all(wd)
        mill.modules.Jvm.baseInteractiveSubprocess(
          Seq(launcher().path.toString) ++ rest,
          forkEnv(),
          workingDir = wd
        )
        mill.eval.Result.Success(())
    }

  }
}


def assembly = T{

  val version = publishVersion()._2
  val devRunClasspath = dev.runClasspath().map(_.path)
  val filename = if (scala.util.Properties.isWin) "mill.bat" else "mill"
  val commonArgs = Seq(
    "-DMILL_VERSION=" + version,
    // Workaround for Zinc/JNA bug
    // https://github.com/sbt/sbt/blame/6718803ee6023ab041b045a6988fafcfae9d15b5/main/src/main/scala/sbt/Main.scala#L130
    "-Djna.nosys=true"
  )
  val shellArgs = Seq("-DMILL_CLASSPATH=$0") ++ commonArgs
  val cmdArgs = Seq("-DMILL_CLASSPATH=%0") ++ commonArgs
  os.move(
    createAssembly(
      devRunClasspath,
      prependShellScript = launcherScript(
        shellArgs,
        cmdArgs,
        Agg("$0"),
        Agg("%~dpnx0")
      )
    ).path,
    T.ctx().dest / filename
  )
  PathRef(T.ctx().dest / filename)
}

def millBootstrap = T.sources(os.pwd / "mill")

def launcher = T{
  val outputPath = T.ctx().dest / "mill"
  val millBootstrapGrepPrefix = "\nDEFAULT_MILL_VERSION="
  os.write(
    outputPath,
    os.read(millBootstrap().head.path)
      .replaceAll(
        millBootstrapGrepPrefix + "[^\\n]+",
        millBootstrapGrepPrefix + publishVersion()._2
      )
  )
  os.perms.set(outputPath, "rwxrwxrwx")
  PathRef(outputPath)
}

val isMasterCommit = {
  sys.env.get("TRAVIS_PULL_REQUEST") == Some("false") &&
  (sys.env.get("TRAVIS_BRANCH") == Some("master") || sys.env("TRAVIS_TAG") != "")
}

def gitHead = T.input{
  sys.env.get("TRAVIS_COMMIT").getOrElse(
    os.proc('git, "rev-parse", "HEAD").call().out.trim
  )
}

def publishVersion = T.input{
  val tag =
    try Option(
      os.proc('git, 'describe, "--exact-match", "--tags", "--always", gitHead()).call().out.trim
    )
    catch{case e => None}

  val dirtySuffix = os.proc('git, 'diff).call().out.trim match{
    case "" => ""
    case s => "-DIRTY" + Integer.toHexString(s.hashCode)
  }

  tag match{
    case Some(t) => (t, t)
    case None =>
      val latestTaggedVersion = os.proc('git, 'describe, "--abbrev=0", "--always", "--tags").call().out.trim

      val commitsSinceLastTag =
        os.proc('git, "rev-list", gitHead(), "--not", latestTaggedVersion, "--count").call().out.trim.toInt

      (latestTaggedVersion, s"$latestTaggedVersion-$commitsSinceLastTag-${gitHead().take(6)}$dirtySuffix")
  }
}

def uploadToGithub(authKey: String) = T.command{
  val (releaseTag, label) = publishVersion()

  if (releaseTag == label){
    scalaj.http.Http("https://api.github.com/repos/lihaoyi/mill/releases")
      .postData(
        ujson.write(
          ujson.Obj(
            "tag_name" -> releaseTag,
            "name" -> releaseTag
          )
        )
      )
      .header("Authorization", "token " + authKey)
      .asString
  }

  upload.apply(assembly().path, releaseTag, label + "-assembly", authKey)

  upload.apply(launcher().path, releaseTag, label, authKey)
}