Project Setup (#4)

* Set up the interpreter project.
* Reformat build.sbt
* Fix style guide

build.sbt

@@ -1,46 +1,92 @@
-version := "1.0"
+// Global Configuration
 organization := "org.enso"
 scalaVersion := "2.12.8"
 
+// Compiler Options
+scalacOptions ++= Seq(
+  "-deprecation",
+  "-feature",
+  "-unchecked",
+  "-Xlint"
+)
+
+// Benchmark Configuration
 lazy val Benchmark = config("bench") extend Test
-lazy val bench = taskKey[Unit]("Run Benchmarks")
+lazy val bench     = taskKey[Unit]("Run Benchmarks")
 
+// Global Project
 lazy val enso = (project in file("."))
-  .aggregate(syntax, pkg)
+  .settings(version := "0.1")
+  .aggregate(
+    syntax,
+    pkg,
+    interpreter
+  )
 
+// Sub-Projects
 lazy val syntax = (project in file("syntax"))
+  .settings(
+    mainClass in (Compile, run) := Some("org.enso.syntax.Main"),
+    version := "0.1"
+  )
+  .settings(
+    libraryDependencies ++= Seq(
+      "com.storm-enroute" %% "scalameter" % "0.17" % "bench",
+      "org.typelevel"     %% "cats-core"  % "1.6.0",
+      "org.scalatest"     %% "scalatest"  % "3.0.5" % Test,
+      "com.lihaoyi"       %% "pprint"     % "0.5.3"
+    ),
+    resolvers ++= Seq(
+      "Sonatype OSS Snapshots" at
+      "https://oss.sonatype.org/content/repositories/snapshots",
+      "Sonatype OSS Releases" at
+      "https://oss.sonatype.org/content/repositories/releases"
+    )
+  )
+  .settings(SbtJFlexPlugin.jflexSettings)
+  .configs(Test)
+  .settings(
+    testFrameworks += new TestFramework("org.scalameter.ScalaMeterFramework"),
+    logBuffered := false
+  )
   .configs(Benchmark)
   .settings(
     inConfig(Benchmark)(Defaults.testSettings),
-    name := "syntax",
-    organization := "org.enso",
-    scalaVersion := "2.12.8",
-    scalacOptions ++= Seq("-deprecation", "-unchecked", "-feature", "-Xlint"),
-    publishArtifact := false,
-    libraryDependencies ++= Seq(
-      "com.storm-enroute" %% "scalameter" % "0.17" % "bench",
-      "org.typelevel" %% "cats-core" % "1.6.0",
-      "org.scalatest" %% "scalatest" % "3.0.5" % Test,
-      "com.lihaoyi" %% "pprint" % "0.5.3"
-    ),
-    resolvers ++= Seq(
-      "Sonatype OSS Snapshots" at "https://oss.sonatype.org/content/repositories/snapshots",
-      "Sonatype OSS Releases" at "https://oss.sonatype.org/content/repositories/releases"
-    ),
-    testFrameworks += new TestFramework("org.scalameter.ScalaMeterFramework"),
-    parallelExecution in Benchmark := false,
-    logBuffered := false
+    bench := (test in Benchmark).value,
+    parallelExecution in Benchmark := false
   )
-  .settings(SbtJFlexPlugin.jflexSettings)
-  .settings(mainClass in (Compile, run) := Some("org.enso.syntax.Main"))
-  .settings(bench := {
-    (test in Benchmark).value
-  })
 
 lazy val pkg = (project in file("pkg"))
   .settings(
     mainClass in (Compile, run) := Some("org.enso.pkg.Main"),
+    version := "0.1"
+  )
+  .settings(
     libraryDependencies ++= Seq("circe-core", "circe-generic", "circe-yaml")
       .map("io.circe" %% _ % "0.10.0"),
     libraryDependencies += "commons-io" % "commons-io" % "2.6"
   )
+
+lazy val interpreter = (project in file("interpreter"))
+  .settings(
+    mainClass in (Compile, run) := Some("org.enso.interpreter.Main"),
+    version := "0.1"
+  )
+  .settings(
+    libraryDependencies ++= Seq(
+      "com.chuusai"       %% "shapeless"  % "2.3.3",
+      "com.storm-enroute" %% "scalameter" % "0.17" % "bench",
+      "org.graalvm.sdk"   % "graal-sdk"   % "19.0.0",
+      "org.scalacheck"    %% "scalacheck" % "1.14.0" % Test,
+      "org.scalatest"     %% "scalatest"  % "3.2.0-SNAP10" % Test,
+      "org.typelevel"     %% "cats-core"  % "2.0.0-M4"
+    )
+  )
+  .dependsOn(syntax)
+  .configs(Test)
+  .configs(Benchmark)
+  .settings(
+    inConfig(Benchmark)(Defaults.testSettings),
+    bench := (test in Benchmark).value,
+    parallelExecution in Benchmark := false
+  )

doc/scala-style-guide.md

@@ -11,9 +11,6 @@ programmer burden; there is usually only _one way_ to lay out code correctly.
 
 - [Code Formatting](#code-formatting)
   - [Naming](#naming)
-  - [Imports](#imports)
-  - [Visibility](#visibility)
-  - [Section Headers](#section-headers)
 - [Build Tooling](#build-tooling)
 - [Commenting](#commenting)
   - [Documentation Comments](#documentation-comments)
@@ -40,8 +37,9 @@ should be used for all new Scala projects.
 All files must be formatted using `scalafmt` before commit, and this should be
 set up as either a precommit hook, or using the integration in IntelliJ. If you
 use the IntelliJ integration, please note that you need only have the official
-[Scala Plugin](https://www.jetbrains.com/help/idea/discover-intellij-idea-for-scala.html) installed, and be using IntelliJ 2019.1
-or later. You should _not_ use the independent Scalafmt plugin.
+[Scala Plugin](https://www.jetbrains.com/help/idea/discover-intellij-idea-for-scala.html) 
+installed, and be using IntelliJ 2019.1 or later. You should _not_ use the 
+independent Scalafmt plugin.
 
 ### Naming
 Luna has some fairly simple general naming conventions, though the sections
@@ -56,59 +54,6 @@ below may provide more rules for use in specific cases.
   temporary data in a function.
 - Names should be descriptive, even if this makes them longer.
 
-### Imports
-Organisation of imports is simple, and should be ordered alphabetically within
-each of the following sections. Each section should be separated from the one
-above using a blank line.
-
-1. **Standard Library:** Any imports from the standard library.
-2. **Java Standard Library:** Any imports from the Java standard library.
-3. **Additional Dependencies:** Imports from project dependencies.
-
-In general, we prefer not to import unqualified into the package scope, as this
-just leads to additional clutter.
-
-### Visibility
-There is nothing more frustrating than needing to use a function that hasn't
-been exported from a package. To this end, we strongly discourage making things
-private or protected in our codebase.
-
-If, however, you want to indicate that something is for internal use, you use
-one of the following two methods.
-
-1. **Nested Types:** Declaration of inner types called `Internal`.
-2. **Internal Packages:**  For a package named `com.luna-lang.package` that
-   contains `MyType`, we can define internal functions and data-types in a
-   package named `com.luna-lang.package.mytype`. This means that these functions
-   can be imported by clients of the API if they need to, but that we provide no
-   guarantees about API stability when using those functions.
-
-### Section Headers
-In order to visually break up the code for easier 'visual grepping', we organise
-it using section headers. These allow us to easily find the section that we are
-looking for, even in a large file.
-
-For each Scala type, within the body of the type, we organise functions as
-follows:
-
-```hs
--- === Definition === --
-{- The definition of the type goes here -}
-
-
--- === API === --
-{- The API of the type goes here -}
-
-
--- === Instances === --
-{- Any instances for the type go here -}
-
-```
-
-The section header must be preceded by three blank lines, while the subsection
-headers (except the first) should be preceded by two blank lines. Any of these
-subsections may be omitted if they don't exist.
-
 ## Build Tooling
 All Scala projects in the Luna organisation should manage their dependencies and
 build setup using [SBT](hhttps://www.scala-sbt.org/1.x/docs/index.html).

interpreter/src/bench/scala/org/enso/interpreter/Main.scala

@@ -0,0 +1,5 @@
+package org.enso.interpreter
+
+import org.scalameter.Bench
+
+object MainBenchmark extends Bench.OfflineReport {}

interpreter/src/main/scala/org/enso/interpreter/Main.scala

@@ -0,0 +1,8 @@
+package org.enso.interpreter
+
+object Main {
+
+  def main(args: Array[String]): Unit = {
+    println(x = "Hello, Enso!")
+  }
+}

interpreter/src/test/scala/org/enso/interpreter/Main.scala

@@ -0,0 +1,6 @@
+package org.enso.interpreter
+
+import org.scalatest.FlatSpec
+import org.scalatest.Matchers
+
+class MainSpec extends FlatSpec with Matchers {}