Spark Enrich: use automated code formatting (closes #3654)

3-enrich/spark-enrich/.scalafmt.conf

@@ -0,0 +1,30 @@
+style = defaultWithAlign
+maxColumn = 100
+
+docstrings = JavaDoc
+optIn.breakChainOnFirstMethodDot = true
+spaces.afterKeywordBeforeParen = true
+continuationIndent.defnSite = 2
+continuationIndent.callSite = 2
+importSelectors = noBinPack
+
+newlines {
+  sometimesBeforeColonInMethodReturnType = false
+}
+
+align {
+  arrowEnumeratorGenerator = false
+  ifWhileOpenParen = false
+  openParenCallSite = false
+  openParenDefnSite = false
+}
+
+rewrite {
+  rules = [
+    AsciiSortImports,
+    RedundantBraces,
+    RedundantParens,
+    PreferCurlyFors
+  ]
+  redundantBraces.maxLines = 1
+}

3-enrich/spark-enrich/build.sbt

@@ -18,6 +18,7 @@ lazy val root = project.in(file("."))
     version     := "1.12.0",
     description := "The Snowplow Spark Enrichment process"
   )
+  .settings(BuildSettings.formatting)
   .settings(BuildSettings.buildSettings)
   .settings(BuildSettings.sbtAssemblySettings)
   .settings(

3-enrich/spark-enrich/project/BuildSettings.scala

@@ -15,6 +15,10 @@
 import sbt._
 import Keys._
 
+// Scalafmt plugin
+import com.lucidchart.sbt.scalafmt.ScalafmtPlugin._
+import com.lucidchart.sbt.scalafmt.ScalafmtCorePlugin.autoImport._
+
 object BuildSettings {
 
   // Basic settings for our app
@@ -82,4 +86,9 @@ object BuildSettings {
         oldStrategy(x)
     }
   )
+  lazy val formatting = Seq(
+    scalafmtConfig    := file(".scalafmt.conf"),
+    scalafmtOnCompile := true,
+    scalafmtVersion   := "1.3.0"
+  )
 }

3-enrich/spark-enrich/project/plugins.sbt

@@ -1 +1,5 @@
 addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3")
+
+addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.1")
+
+addSbtPlugin("com.lucidchart" % "sbt-scalafmt-coursier" % "1.14")