Integrates freestyle and sbt-org-policies plugin, and, also:

* Fixes compilation issues
* Moves core sources to correct folder
* Fixes tests
* Provides Scalafmt as code formatter
* Autoheaders changes

Author: juanpedromoreno

src/main/scala/org/scalaexercises/exercises/Exercises.scala

@@ -1,5 +1,5 @@
 /*
- * scala-exercises-runtime
+ * scala-exercises - runtime
  * Copyright (C) 2015-2016 47 Degrees, LLC. <http://www.47deg.com>
  */
 
@@ -20,33 +20,38 @@ object Exercises {
   val LIBRARIES_PACKAGE = "org.scalaexercises.content"
 
   private[this] def classMap(cl: ClassLoader) = {
-    val files = cl.asInstanceOf[URLClassLoader].getURLs map (_.getFile)
+    val files       = cl.asInstanceOf[URLClassLoader].getURLs map (_.getFile)
     val classFinder = ClassFinder(files map (new File(_)) filter (f ⇒ f.exists()))
-    val classes = classFinder.getClasses.toIterator
+    val classes     = classFinder.getClasses.toIterator
     ClassFinder.classInfoMap(classes)
   }
 
   private[this] def subclassesOf[A: ClassTag](cl: ClassLoader): List[String] = {
-    def loop(currentClassLoader: ClassLoader, acc: List[String]): List[String] = Option(currentClassLoader) match {
-      case None ⇒ acc
-      case Some(cll: URLClassLoader) ⇒
-        val cn = ClassFinder.concreteSubclasses(implicitly[ClassTag[A]].runtimeClass.getName, classMap(cll))
-          .filter(_.name.startsWith(LIBRARIES_PACKAGE))
-          .map(_.name)
-          .toList
-        loop(currentClassLoader.getParent, acc ++ cn)
-      case Some(o) ⇒ loop(o.getParent, acc)
-    }
+    def loop(currentClassLoader: ClassLoader, acc: List[String]): List[String] =
+      Option(currentClassLoader) match {
+        case None ⇒ acc
+        case Some(cll: URLClassLoader) ⇒
+          val cn = ClassFinder
+            .concreteSubclasses(implicitly[ClassTag[A]].runtimeClass.getName, classMap(cll))
+            .filter(_.name.startsWith(LIBRARIES_PACKAGE))
+            .map(_.name)
+            .toList
+          loop(currentClassLoader.getParent, acc ++ cn)
+        case Some(o) ⇒ loop(o.getParent, acc)
+      }
     loop(cl, Nil)
   }
 
-  def discoverLibraries(cl: ClassLoader = classOf[Exercise].getClassLoader): (List[String], List[Library]) = {
+  def discoverLibraries(
+      cl: ClassLoader = classOf[Exercise].getClassLoader): (List[String], List[Library]) = {
     val classNames: List[String] = subclassesOf[Library](cl)
 
     val errorsAndLibraries = classNames.map { name ⇒
       for {
         loadedClass ← guard(Class.forName(name, true, cl), s"$name not found")
-        loadedObject ← guard(loadedClass.getField("MODULE$").get(null), s"$name must be defined as an object")
+        loadedObject ← guard(
+          loadedClass.getField("MODULE$").get(null),
+          s"$name must be defined as an object")
         loadedLibrary ← guard(loadedObject.asInstanceOf[Library], s"$name must extend Library")
       } yield loadedLibrary
     }
@@ -58,12 +63,12 @@ object Exercises {
     Either.catchNonFatal(f).leftMap(_ ⇒ message)
 
   def buildEvaluatorRequest(
-    pkg:                 String,
-    qualifiedMethod:     String,
-    rawArgs:             List[String],
-    imports:             List[String] = Nil,
-    resolvers:           List[String],
-    libraryDependencies: List[String]
+      pkg: String,
+      qualifiedMethod: String,
+      rawArgs: List[String],
+      imports: List[String] = Nil,
+      resolvers: List[String],
+      libraryDependencies: List[String]
   ): (List[String], List[Dependency], String) = {
 
     val extractEvaluatorResolvers: List[String] = {
@@ -79,7 +84,7 @@ object Exercises {
       }
     }
 
-    val pre = (s"import $pkg._" :: imports).mkString("; ")
+    val pre  = (s"import $pkg._" :: imports).mkString("; ")
     val code = s"""$qualifiedMethod(${rawArgs.mkString(", ")})"""
 
     val allCode = s"{$pre; $code}"

src/main/scala/org/scalaexercises/exercises/Timestamp.scala

@@ -1,12 +1,12 @@
 /*
- * scala-exercises-exercise-compiler
+ * scala-exercises - runtime
  * Copyright (C) 2015-2016 47 Degrees, LLC. <http://www.47deg.com>
  */
 
 package org.scalaexercises.runtime
 
 import java.text.SimpleDateFormat
-import java.util.{ Date, TimeZone }
+import java.util.{Date, TimeZone}
 
 object Timestamp {
   val ISO8601 = "yyyy-MM-dd'T'HH:mm:ssz"
@@ -17,9 +17,8 @@ object Timestamp {
     setTimeZone(UTC)
   }
 
-  def fromDate(d: Date): String = {
+  def fromDate(d: Date): String =
     FORMAT.format(d)
-  }
 
   def toDate(timestamp: String): Date = FORMAT.parse(timestamp)
 }

src/main/scala/org/scalaexercises/exercises/model.scala

@@ -1,5 +1,5 @@
 /*
- * scala-exercises-runtime
+ * scala-exercises - runtime
  * Copyright (C) 2015-2016 47 Degrees, LLC. <http://www.47deg.com>
  */
 
@@ -9,7 +9,7 @@ package model
 // This is the exercise runtime metamodel
 
 /** An exercise library.
-  */
+ */
 trait Library {
   def owner: String
   def repository: String
@@ -24,14 +24,14 @@ trait Library {
 }
 
 /** Library Build Metadata Information
-  */
+ */
 trait BuildInfo {
   def resolvers: List[String]
   def libraryDependencies: List[String]
 }
 
 /** A section in a library.
-  */
+ */
 trait Section {
   def name: String
   def description: Option[String]
@@ -42,7 +42,7 @@ trait Section {
 }
 
 /** A contribution to a section.
-  */
+ */
 trait Contribution {
   def sha: String
   def message: String
@@ -54,7 +54,7 @@ trait Contribution {
 }
 
 /** Exercises within a section.
-  */
+ */
 trait Exercise {
   def name: String
   def description: Option[String]
@@ -67,48 +67,47 @@ trait Exercise {
 
 // default case class implementations
 case class DefaultLibrary(
-  owner:         String,
-  repository:    String,
-  name:          String,
-  description:   String,
-  color:         Option[String],
-  logoPath:      String,
-  logoData:      Option[String],
-  sections:      List[Section]  = Nil,
-  timestamp:     String,
-  buildMetaInfo: BuildInfo
+    owner: String,
+    repository: String,
+    name: String,
+    description: String,
+    color: Option[String],
+    logoPath: String,
+    logoData: Option[String],
+    sections: List[Section] = Nil,
+    timestamp: String,
+    buildMetaInfo: BuildInfo
 ) extends Library
 
 case class DefaultContribution(
-  sha:       String,
-  message:   String,
-  timestamp: String,
-  url:       String,
-  author:    String,
-  authorUrl: String,
-  avatarUrl: String
+    sha: String,
+    message: String,
+    timestamp: String,
+    url: String,
+    author: String,
+    authorUrl: String,
+    avatarUrl: String
 ) extends Contribution
 
 case class DefaultSection(
-  name:          String,
-  description:   Option[String],
-  exercises:     List[Exercise]            = Nil,
-  imports:       List[String]              = Nil,
-  path:          Option[String]            = None,
-  contributions: List[DefaultContribution] = Nil
+    name: String,
+    description: Option[String],
+    exercises: List[Exercise] = Nil,
+    imports: List[String] = Nil,
+    path: Option[String] = None,
+    contributions: List[DefaultContribution] = Nil
 ) extends Section
 
 case class DefaultExercise(
-  name:            String,
-  description:     Option[String] = None,
-  code:            String,
-  qualifiedMethod: String,
-  imports:         List[String],
-  explanation:     Option[String] = None,
-  packageName:     String
+    name: String,
+    description: Option[String] = None,
+    code: String,
+    qualifiedMethod: String,
+    imports: List[String],
+    explanation: Option[String] = None,
+    packageName: String
 ) extends Exercise
 /*
  * scala-exercises-runtime
  * Copyright (C) 2015-2016 47 Degrees, LLC. <http://www.47deg.com>
  */
-

src/test/scala/com/fortysevendeg/exercises/Content.scala

@@ -1,55 +1,60 @@
+/*
+ * scala-exercises - runtime
+ * Copyright (C) 2015-2016 47 Degrees, LLC. <http://www.47deg.com>
+ */
+
 package org.scalaexercises.content
 
 import org.scalaexercises.runtime.model.Library
 
 object LibraryA extends Library {
-  override def owner = ???
-  override def repository = ???
-  override def color = ???
-  override def logoPath = ???
-  override def logoData = ???
-  override def description = ???
-  override def name = ???
-  override def sections = ???
-  override def timestamp = ???
+  override def owner         = ???
+  override def repository    = ???
+  override def color         = ???
+  override def logoPath      = ???
+  override def logoData      = ???
+  override def description   = ???
+  override def name          = ???
+  override def sections      = ???
+  override def timestamp     = ???
   override def buildMetaInfo = ???
 }
 
 object LibraryB extends Library {
-  override def owner = ???
-  override def repository = ???
-  override def color = ???
-  override def logoPath = ???
-  override def logoData = ???
-  override def description = ???
-  override def name = ???
-  override def sections = ???
-  override def timestamp = ???
+  override def owner         = ???
+  override def repository    = ???
+  override def color         = ???
+  override def logoPath      = ???
+  override def logoData      = ???
+  override def description   = ???
+  override def name          = ???
+  override def sections      = ???
+  override def timestamp     = ???
   override def buildMetaInfo = ???
 }
 
 object LibraryC extends Library {
-  override def owner = ???
-  override def repository = ???
-  override def color = ???
-  override def logoPath = ???
-  override def logoData = ???
-  override def description = ???
-  override def name = ???
-  override def sections = ???
-  override def timestamp = ???
+  override def owner         = ???
+  override def repository    = ???
+  override def color         = ???
+  override def logoPath      = ???
+  override def logoData      = ???
+  override def description   = ???
+  override def name          = ???
+  override def sections      = ???
+  override def timestamp     = ???
   override def buildMetaInfo = ???
 }
 
 class ErrorLibrary extends Library {
-  override def owner = ???
-  override def repository = ???
-  override def color = ???
-  override def logoPath = ???
-  override def logoData = ???
-  override def description = ???
-  override def name = ???
-  override def sections = ???
-  override def timestamp = ???
+  override def owner         = ???
+  override def repository    = ???
+  override def color         = ???
+  override def logoPath      = ???
+  override def logoData      = ???
+  override def description   = ???
+  override def name          = ???
+  override def sections      = ???
+  override def timestamp     = ???
   override def buildMetaInfo = ???
 }

src/test/scala/com/fortysevendeg/exercises/ExampleTarget.scala

@@ -1,15 +1,18 @@
+/*
+ * scala-exercises - runtime
+ * Copyright (C) 2015-2016 47 Degrees, LLC. <http://www.47deg.com>
+ */
+
 package org.scalaexercises.runtime
 
 import org.scalatest._
 
 object ExampleTarget extends FlatSpec with Matchers {
-  def intStringMethod(a: Int, b: String): String = {
+  def intStringMethod(a: Int, b: String): String =
     s"$a$b"
-  }
 
-  def isOne(a: Int) = {
+  def isOne(a: Int) =
     a shouldBe 1
-  }
 
   class ExampleException extends Exception("this is an example exception")
 

src/test/scala/com/fortysevendeg/exercises/LibraryDiscoverySpec.scala

@@ -1,5 +1,5 @@
 /*
- * scala-exercises-runtime
+ * scala-exercises - runtime
  * Copyright (C) 2015-2016 47 Degrees, LLC. <http://www.47deg.com>
  */
 
@@ -20,7 +20,9 @@ class LibraryDiscoverySpec extends FunSpec with Matchers {
       val (errors, discovered) = Exercises.discoverLibraries()
 
       discovered.toSet shouldEqual Set(
-        LibraryA, LibraryB, LibraryC
+        LibraryA,
+        LibraryB,
+        LibraryC
       )
     }