Add scalafix and organize-imports rule

.scalafix.conf

@@ -0,0 +1,13 @@
+rules = [
+      ProcedureSyntax
+      OrganizeImports
+]
+OrganizeImports {
+  coalesceToWildcardImportThreshold = 3
+  expandRelative = true
+  groupedImports = Keep
+  importsOrder = Ascii
+  groups = ["re:javax?\\.", "scala.", "re:(cats|fs2)\\.", "docspell.", "*"]
+  importSelectorsOrder = Ascii
+  removeUnused = true
+}

build.sbt

@@ -11,6 +11,12 @@ val elmCompileMode = settingKey[ElmCompileMode]("How to compile elm sources")
 
 // --- Settings
 
+val scalafixSettings = Seq(
+  semanticdbEnabled := true, // enable SemanticDB
+  semanticdbVersion := scalafixSemanticdb.revision, //"4.3.10", // use Scalafix compatible version
+  ThisBuild / scalafixDependencies ++= Dependencies.organizeImports
+)
+
 val sharedSettings = Seq(
   organization := "com.github.eikek",
   scalaVersion := "2.13.2",
@@ -37,7 +43,7 @@ val sharedSettings = Seq(
     (scalacOptions.value.filter(o => !o.contains("Xlint")) ++ Seq("-Xlint:_,-unused")),
   scalacOptions in (Test, console) :=
     (scalacOptions.value.filter(o => !o.contains("Xlint")) ++ Seq("-Xlint:_,-unused"))
-)
+) ++ scalafixSettings
 
 val testSettings = Seq(
   testFrameworks += new TestFramework("minitest.runner.Framework"),
@@ -143,7 +149,6 @@ val openapiScalaSettings = Seq(
 )
 
 
-
 // --- Modules
 
 // Base module, everything depends on this – including restapi and

project/Dependencies.scala

@@ -24,6 +24,7 @@ object Dependencies {
   val LogbackVersion          = "1.2.3"
   val MariaDbVersion          = "2.6.1"
   val MiniTestVersion         = "2.8.2"
+  val OrganizeImportsVersion  = "0.3.1-RC3"
   val PdfboxVersion           = "2.0.20"
   val PoiVersion              = "4.1.2"
   val PostgresVersion         = "42.2.14"
@@ -253,4 +254,8 @@ object Dependencies {
   val icu4j = Seq(
     "com.ibm.icu" % "icu4j" % Icu4jVersion
   )
+
+  val organizeImports = Seq(
+    "com.github.liancheng" %% "organize-imports" % OrganizeImportsVersion
+  )
 }

project/plugins.sbt

@@ -1,3 +1,4 @@
+addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.9.17")
 addSbtPlugin("com.47deg" % "sbt-microsites" % "1.2.1")
 addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.9.0")
 addSbtPlugin("com.github.eikek" % "sbt-openapi-schema" % "0.6.1")