Add scalafmt

Author: NthPortal

.scalafmt.conf

@@ -0,0 +1,7 @@
+version = "2.7.5"
+align.preset = more
+docstrings = JavaDoc
+assumeStandardLibraryStripMargin = true
+project.git = true
+maxColumn = 100
+trailingCommas = multiple

build.sbt

@@ -1,18 +1,19 @@
-lazy val root = project.in(file("."))
+lazy val root = project
+  .in(file("."))
   .aggregate(scalaLibraryNextJVM, scalaLibraryNextJS)
   .settings(
     publish / skip := true,
     // With CrossType.Pure, the root project also picks up the sources in `src`
     Compile / unmanagedSourceDirectories := Nil,
-    Test    / unmanagedSourceDirectories := Nil,
+    Test / unmanagedSourceDirectories := Nil,
   )
 
 lazy val scalaLibraryNext = crossProject(JVMPlatform, JSPlatform)
   .crossType(CrossType.Pure)
   .in(file("."))
   .jvmSettings(
-    libraryDependencies += "junit" % "junit" % "4.13.1" % Test,
-    libraryDependencies += "com.novocode" % "junit-interface" % "0.11" % Test,
+    libraryDependencies += "junit"        % "junit"           % "4.13.1" % Test,
+    libraryDependencies += "com.novocode" % "junit-interface" % "0.11"   % Test,
     testOptions += Tests.Argument(TestFrameworks.JUnit, "-a", "-v"),
   )
   .jsConfigure(_.enablePlugins(ScalaJSJUnitPlugin))
@@ -21,11 +22,11 @@ lazy val scalaLibraryNext = crossProject(JVMPlatform, JSPlatform)
     scalaModuleMimaPreviousVersion := None,
     scalacOptions ++= Seq("-deprecation", "-feature", "-Werror"),
     libraryDependencies ++= Seq(
-      "org.scalacheck" %%% "scalacheck" % "1.15.0" % Test,
+      "org.scalacheck" %%% "scalacheck" % "1.15.0" % Test
     ),
   )
   .jsSettings(
-    Test / fork := false,
+    Test / fork := false
   )
 
 lazy val scalaLibraryNextJVM = scalaLibraryNext.jvm

project/plugins.sbt

@@ -1,3 +1,4 @@
-addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module" % "2.2.3")
-addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.3.0")
-addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.0.0")
+addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module"         % "2.2.3")
+addSbtPlugin("org.scalameta"          % "sbt-scalafmt"             % "2.4.2")
+addSbtPlugin("org.scala-js"           % "sbt-scalajs"              % "1.3.0")
+addSbtPlugin("org.portable-scala"     % "sbt-scalajs-crossproject" % "1.0.0")