Remove scalaz as a dependency (via coursier)

backend/src/main/scala/bloop/DependencyResolution.scala

@@ -26,7 +26,6 @@ object DependencyResolution {
     Repository,
     Resolution
   }
-  import coursier.interop.scalaz._
   import scalaz.concurrent.Task
 
   /**
@@ -46,7 +45,9 @@ object DependencyResolution {
       version: String,
       logger: Logger,
       additionalRepositories: Seq[Repository] = Nil
-  ): Array[AbsolutePath] = {
+  )(implicit ec: scala.concurrent.ExecutionContext): Array[AbsolutePath] = {
+    import coursier._
+    import coursier.util.{Gather, Task}
     logger.debug(s"Resolving $organization:$module:$version")(DebugFilter.Compilation)
     val org = coursier.Organization(organization)
     val moduleName = coursier.ModuleName(module)
@@ -56,20 +57,30 @@ object DependencyResolution {
       val baseRepositories = Seq(
         Cache.ivy2Local,
         MavenRepository("https://repo1.maven.org/maven2"),
-        MavenRepository("https://dl.bintray.com/scalacenter/releases"))
+        MavenRepository("https://dl.bintray.com/scalacenter/releases")
+      )
       baseRepositories ++ additionalRepositories
     }
-    val fetch = Fetch.from(repositories, Cache.fetch())
-    val resolution = start.process.run(fetch).unsafePerformSync
-    val errors = resolution.errors
-    if (errors.isEmpty) {
-      val localArtifacts: List[Either[FileError, File]] =
-        Task.gatherUnordered(resolution.artifacts().map(Cache.file(_).run)).unsafePerformSync
-      localArtifacts.collect { case Right(f) => AbsolutePath(f.toPath) }.toArray
+    val fetch = Fetch.from(repositories, Cache.fetch[Task]())
+    val resolution = start.process.run(fetch).unsafeRun()
+    val localArtifacts: Seq[(Boolean, Either[FileError, File])] = {
+      Gather[Task]
+        .gather(resolution.artifacts().map { artifact =>
+          Cache.file[Task](artifact).run.map(artifact.optional -> _)
+        })
+        .unsafeRun()
+    }
+
+    val fileErrors = localArtifacts.collect {
+      case (isOptional, Left(error)) if !isOptional || !error.notFound => error
+    }
+    if (fileErrors.isEmpty) {
+      localArtifacts.collect { case (_, Right(f)) => AbsolutePath(f.toPath) }.toArray
     } else {
       val moduleInfo = s"$organization:$module:$version"
+      val prettyFileErrors = fileErrors.map(_.describe).mkString(System.lineSeparator)
       sys.error(
-        s"Resolution of module $moduleInfo failed with: ${errors.mkString("\n =>", "=> \n", "\n")}"
+        s"Resolution of module $moduleInfo failed with:${System.lineSeparator}${prettyFileErrors}"
       )
     }
   }

backend/src/main/scala/bloop/ScalaInstance.scala

@@ -76,6 +76,7 @@ final class ScalaInstance private (
 
 object ScalaInstance {
   import bloop.io.AbsolutePath
+  import scala.concurrent.ExecutionContext
 
   private[ScalaInstance] final val ScalacCompilerName = "scala-compiler"
 
@@ -97,12 +98,13 @@ object ScalaInstance {
       scalaVersion: String,
       allJars: Seq[AbsolutePath],
       logger: Logger
-  ): ScalaInstance = {
+  )(implicit ec: ExecutionContext): ScalaInstance = {
     val jarsKey = allJars.map(_.underlying).sortBy(_.toString).toList
     if (allJars.nonEmpty) {
       def newInstance = {
         logger.debug(s"Cache miss for scala instance ${scalaOrg}:${scalaName}:${scalaVersion}.")(
-          DebugFilter.Compilation)
+          DebugFilter.Compilation
+        )
         jarsKey.foreach(p => logger.debug(s"  => $p")(DebugFilter.Compilation))
         new ScalaInstance(scalaOrg, scalaName, scalaVersion, allJars.map(_.toFile).toArray)
       }
@@ -123,7 +125,7 @@ object ScalaInstance {
       scalaName: String,
       scalaVersion: String,
       logger: Logger
-  ): ScalaInstance = {
+  )(implicit ec: ExecutionContext): ScalaInstance = {
     def resolveInstance: ScalaInstance = {
       val allPaths = DependencyResolution.resolve(scalaOrg, scalaName, scalaVersion, logger)
       val allJars = allPaths.collect {
@@ -158,7 +160,9 @@ object ScalaInstance {
    * happen to be so strict as to prevent getting the location from the protected
    * domain.
    */
-  def scalaInstanceFromBloop(logger: Logger): Option[ScalaInstance] = {
+  def scalaInstanceFromBloop(
+      logger: Logger
+  )(implicit ec: ExecutionContext): Option[ScalaInstance] = {
     lazy val tempDirectory = Files.createTempDirectory("bloop-scala-instance")
     implicit val filter = DebugFilter.Compilation
     def findLocationForClazz(clazz: Class[_], jarName: String): Option[Path] = {

backend/src/test/scala/bloop/ScalaInstanceCachingSpec.scala

@@ -10,6 +10,8 @@ import org.junit.runner.RunWith
 import org.junit.runners.Parameterized
 import org.junit.runners.Parameterized.Parameters
 
+import scala.concurrent.ExecutionContext.Implicits.global
+
 object ScalaInstanceCachingSpec {
   val sameVersionPairs = Array("2.10.6", "2.10.1", "2.11.11", "2.12.0", "2.12.4")
   val unsharedVersionPairs =

backend/src/test/scala/bloop/ScalaInstanceSpec.scala

@@ -7,6 +7,7 @@ import org.junit.experimental.categories.Category
 @Category(Array(classOf[FastTests]))
 class ScalaInstanceSpec {
   @Test def testInstanceFromBloop(): Unit = {
+    import scala.concurrent.ExecutionContext.Implicits.global
     val instance0 = ScalaInstance.scalaInstanceFromBloop(new RecordingLogger())
     Assert.assertTrue("Scala instance couldn't be created", instance0.isDefined)
     val instance = instance0.get

build.sbt

@@ -16,7 +16,7 @@ val benchmarkBridge = project
     releaseEarly := { () },
     skip in publish := true,
     bloopGenerate in Compile := None,
-    bloopGenerate in Test := None,
+    bloopGenerate in Test := None
   )
 
 /***************************************************************************************************/
@@ -42,7 +42,6 @@ val backend = project
       Dependencies.scalazConcurrent,
       Dependencies.coursier,
       Dependencies.coursierCache,
-      Dependencies.coursierScalaz,
       Dependencies.libraryManagement,
       Dependencies.configDirectories,
       Dependencies.sourcecode,
@@ -71,7 +70,7 @@ val jsonConfig210 = project
         Dependencies.circeCore,
         Dependencies.circeGeneric,
         compilerPlugin("org.scalamacros" % "paradise" % "2.1.1" cross CrossVersion.full),
-        Dependencies.scalacheck % Test,
+        Dependencies.scalacheck % Test
       )
     }
   )
@@ -92,7 +91,7 @@ val jsonConfig211 = project
       List(
         Dependencies.circeParser,
         Dependencies.circeDerivation,
-        Dependencies.scalacheck % Test,
+        Dependencies.scalacheck % Test
       )
     }
   )
@@ -113,7 +112,7 @@ val jsonConfig212 = project
       List(
         Dependencies.circeParser,
         Dependencies.circeDerivation,
-        Dependencies.scalacheck % Test,
+        Dependencies.scalacheck % Test
       )
     }
   )
@@ -126,7 +125,6 @@ lazy val launcher: Project = project
     libraryDependencies ++= List(
       Dependencies.coursier,
       Dependencies.coursierCache,
-      Dependencies.coursierScalaz,
       Dependencies.nuprocess,
       Dependencies.ipcsocket,
       Dependencies.junit % Test,
@@ -171,7 +169,7 @@ val benchmarks = project
   .enablePlugins(BuildInfoPlugin, JmhPlugin)
   .settings(benchmarksSettings(frontend))
   .settings(
-    skip in publish := true,
+    skip in publish := true
   )
 
 val integrations = file("integrations")
@@ -207,14 +205,16 @@ val gradleBloop211 = project
   .settings(BuildDefaults.gradlePluginBuildSettings)
   .settings(BuildInfoPlugin.buildInfoScopedSettings(Test))
   .settings(scalaVersion := Keys.scalaVersion.in(jsonConfig211).value)
-  .settings(target := (file("integrations") / "gradle-bloop" / "target" / "gradle-bloop-2.11").getAbsoluteFile)
+  .settings(
+    target := (file("integrations") / "gradle-bloop" / "target" / "gradle-bloop-2.11").getAbsoluteFile
+  )
   .settings(
     sourceDirectories in Test := Nil,
     publishLocal := publishLocal.dependsOn(publishLocal.in(jsonConfig211)).value,
     bloopGenerate in Test := None,
     test in Test := Def.task {
       Keys.streams.value.log.error("Run 'gradleBloopTests/test' instead to test the gradle plugin.")
-    },
+    }
   )
 
 lazy val gradleBloop212 = project
@@ -225,7 +225,9 @@ lazy val gradleBloop212 = project
   .settings(BuildDefaults.gradlePluginBuildSettings, testSettings)
   .settings(BuildInfoPlugin.buildInfoScopedSettings(Test))
   .settings(scalaVersion := Keys.scalaVersion.in(jsonConfig212).value)
-  .settings(target := (file("integrations") / "gradle-bloop" / "target" / "gradle-bloop-2.12").getAbsoluteFile)
+  .settings(
+    target := (file("integrations") / "gradle-bloop" / "target" / "gradle-bloop-2.12").getAbsoluteFile
+  )
   .settings(
     publishLocal := publishLocal.dependsOn(publishLocal.in(jsonConfig212)).value
   )
@@ -290,7 +292,7 @@ lazy val nativeBridge = project
     name := "bloop-native-bridge",
     libraryDependencies += Dependencies.scalaNativeTools,
     javaOptions in Test ++= jvmOptions,
-    fork in Test := true,
+    fork in Test := true
   )
 
 /* This project has the only purpose of forcing the resolution of some artifacts that fail spuriously to be fetched.  */
@@ -362,7 +364,7 @@ addCommandAlias(
     s"${jsBridge10.id}/$publishLocalCmd",
     s"${launcher.id}/$publishLocalCmd",
     "createLocalHomebrewFormula",
-    "createLocalScoopFormula",
+    "createLocalScoopFormula"
   ).mkString(";", ";", "")
 )
 

frontend/src/main/scala/bloop/data/Project.scala

@@ -97,6 +97,7 @@ object Project {
   }
 
   def fromConfig(file: Config.File, origin: Origin, logger: Logger): Project = {
+    import bloop.engine.ExecutionContext.ioScheduler
     val project = file.project
     val scala = project.`scala`
 

frontend/src/main/scala/bloop/engine/tasks/toolchains/ToolchainCompanion.scala

@@ -72,8 +72,10 @@ abstract class ToolchainCompanion[Toolchain] {
   private final val BloopVersion = BuildInfo.version
   private final val BloopOrg = BuildInfo.organization
   private def resolveJars(artifactName: String, logger: Logger): List[Path] = {
+    import bloop.engine.ExecutionContext.ioScheduler
     logger.debug(s"Resolving platform bridge: $BloopOrg:$artifactName:$BloopVersion")(
-      DebugFilter.Compilation)
+      DebugFilter.Compilation
+    )
     val files = DependencyResolution.resolve(BloopOrg, artifactName, BloopVersion, logger)
     files.iterator.map(_.underlying).filter(_.toString.endsWith(".jar")).toList
   }

frontend/src/main/scala/bloop/testing/TestInternals.scala

@@ -45,7 +45,8 @@ object TestInternals {
 
   lazy val filteredLoader = {
     val filter = new IncludePackagesFilter(
-      Set("java.", "javax.", "sun.", "sbt.testing.", "org.scalatools.testing.", "org.xml.sax."))
+      Set("java.", "javax.", "sun.", "sbt.testing.", "org.scalatools.testing.", "org.xml.sax.")
+    )
     new FilteredLoader(getClass.getClassLoader, filter)
   }
 
@@ -80,6 +81,7 @@ object TestInternals {
     testAgentFiles match {
       case Some(paths) => paths
       case None =>
+        import bloop.engine.ExecutionContext.ioScheduler
         val paths = DependencyResolution.resolve(sbtOrg, testAgentId, testAgentVersion, logger)
         testAgentFiles = Some(paths)
         paths
@@ -213,8 +215,9 @@ object TestInternals {
     }
   }
 
-  def getFingerprints(frameworks: Seq[Framework])
-    : (Set[PrintInfo[SubclassFingerprint]], Set[PrintInfo[AnnotatedFingerprint]]) = {
+  def getFingerprints(
+      frameworks: Seq[Framework]
+  ): (Set[PrintInfo[SubclassFingerprint]], Set[PrintInfo[AnnotatedFingerprint]]) = {
     val subclasses = mutable.Set.empty[PrintInfo[SubclassFingerprint]]
     val annotated = mutable.Set.empty[PrintInfo[AnnotatedFingerprint]]
     for {
@@ -282,7 +285,8 @@ object TestInternals {
   private def defined[T <: Fingerprint](
       in: Set[PrintInfo[T]],
       names: Set[String],
-      IsModule: Boolean): Set[PrintInfo[T]] = {
+      IsModule: Boolean
+  ): Set[PrintInfo[T]] = {
     in collect { case info @ (name, IsModule, _, _) if names(name) => info }
   }
 

frontend/src/test/scala/bloop/ClasspathHashingSpec.scala

@@ -15,6 +15,7 @@ class ClasspathHashingSpec {
   @Test
   def detectsMacrosInClasspath(): Unit = {
     val logger = new RecordingLogger()
+    import bloop.engine.ExecutionContext.ioScheduler
     val jars = DependencyResolution
       .resolve("ch.epfl.scala", "zinc_2.12", "1.2.1+97-636ca091", logger)
       .filter(_.syntax.endsWith(".jar"))

frontend/src/test/scala/bloop/CompileSpec.scala

@@ -66,12 +66,14 @@ class CompileSpec {
     }
   }
 
-  def scalaInstance2124(logger: Logger): ScalaInstance = ScalaInstance.resolve(
-    "org.scala-lang",
-    "scala-compiler",
-    "2.12.4",
-    logger
-  )
+  def scalaInstance2124(logger: Logger): ScalaInstance = {
+    ScalaInstance.resolve(
+      "org.scala-lang",
+      "scala-compiler",
+      "2.12.4",
+      logger
+    )(bloop.engine.ExecutionContext.ioScheduler)
+  }
 
   @Test
   def compileScalaAndJavaWithMissingDependency(): Unit = {
@@ -179,23 +181,29 @@ class CompileSpec {
   def compileWithScala2124(): Unit = {
     val logger = new RecordingLogger
     val scalaInstance =
-      ScalaInstance.resolve("org.scala-lang", "scala-compiler", "2.12.4", logger)
+      ScalaInstance.resolve("org.scala-lang", "scala-compiler", "2.12.4", logger)(
+        bloop.engine.ExecutionContext.ioScheduler
+      )
     simpleProject(scalaInstance)
   }
 
   @Test
   def compileWithScala2123(): Unit = {
     val logger = new RecordingLogger
     val scalaInstance =
-      ScalaInstance.resolve("org.scala-lang", "scala-compiler", "2.12.3", logger)
+      ScalaInstance.resolve("org.scala-lang", "scala-compiler", "2.12.3", logger)(
+        bloop.engine.ExecutionContext.ioScheduler
+      )
     simpleProject(scalaInstance)
   }
 
   @Test
   def compileWithScala21111(): Unit = {
     val logger = new RecordingLogger
     val scalaInstance =
-      ScalaInstance.resolve("org.scala-lang", "scala-compiler", "2.11.11", logger)
+      ScalaInstance.resolve("org.scala-lang", "scala-compiler", "2.11.11", logger)(
+        bloop.engine.ExecutionContext.ioScheduler
+      )
     simpleProject(scalaInstance)
   }
 
@@ -577,7 +585,9 @@ class CompileSpec {
   def compileWithDotty080RC1(): Unit = {
     val logger = new RecordingLogger()
     val scalaInstance =
-      ScalaInstance.resolve("ch.epfl.lamp", "dotty-compiler_0.8", "0.8.0-RC1", logger)
+      ScalaInstance.resolve("ch.epfl.lamp", "dotty-compiler_0.8", "0.8.0-RC1", logger)(
+        bloop.engine.ExecutionContext.ioScheduler
+      )
     val structures = Map(RootProject -> Map("Dotty.scala" -> ArtificialSources.`Dotty.scala`))
     checkAfterCleanCompilation(structures, Map.empty, scalaInstance = scalaInstance) { state =>
       ensureCompilationInAllTheBuild(state)
@@ -629,7 +639,8 @@ class CompileSpec {
         val targetProject = cleanCompiledState.build.getProjectFor(target).get
         val newProjects = {
           val newTargetProject = targetProject.copy(
-            scalacOptions = "-Ycache-plugin-class-loader:none" :: targetProject.scalacOptions)
+            scalacOptions = "-Ycache-plugin-class-loader:none" :: targetProject.scalacOptions
+          )
           newTargetProject :: cleanCompiledState.build.projects.filter(_ != targetProject)
         }
         val changedState =

frontend/src/test/scala/bloop/util/TestProject.scala

@@ -68,6 +68,7 @@ object TestProject {
       .map(d => AbsolutePath(TestUtil.classesDir(baseDir.underlying, d)))
       .toList
 
+    import bloop.engine.ExecutionContext.ioScheduler
     val version = scalaVersion.getOrElse(Properties.versionNumberString)
     val instance = scalaVersion
       .map(v => ScalaInstance.apply("org.scala-lang", "scala-compiler", v, Nil, NoopLogger))