Improve my car... ehh... sbt

.scalafix.conf

@@ -0,0 +1,36 @@
+rules = [
+  NoAutoTupling
+  RemoveUnused
+  LeakingImplicitClassVal
+  NoValInForComprehension
+  ProcedureSyntax
+  DisableSyntax
+  ExplicitResultTypes
+  Disable
+]
+
+ExplicitResultTypes {
+  unsafeShortenNames = true
+}
+
+Disable.ifSynthetic = [
+  "java/io/Serializable"
+  "scala/Any"
+
+  # when upstream broke noImplicitConversion and we don't agree that their
+  # implicits are worth the mental burden.
+  "scala/Option.option2Iterable"
+  "scala/Predef.any2stringadd"
+
+  # I don't understand why these are synthetic
+  # https://github.com/scalacenter/scalafix/issues/703
+  {
+    regex = {
+      includes = [
+        "^\\Qscala/collection/MapLike#apply().\\E$"
+        "^\\Qscala/collection/LinearSeqOptimized#apply().\\E$"
+      ]
+    }
+    message = "not a total function"
+  }
+]

.travis.yml

@@ -19,15 +19,15 @@ jobs:
       script: sbt test
     -
       name: formatting
-      script: sbt scalafmtCheckAll
+      script: sbt check
     # run ci-release only if previous stages passed
     - stage: release
       script: sbt ci-release
 
 # These directories are cached to S3 at the end of the build
 cache:
   directories:
-    - $HOME/.coursier
+    - $HOME/.cache/coursier
     - $HOME/.ivy2/cache
     - $HOME/.sbt/boot/
     - $HOME/.sbt/launchers

build.sbt

@@ -3,18 +3,11 @@ ThisBuild / homepage := Some(url("https://github.com/avast/scala-server-toolkit"
 ThisBuild / description := "Functional programming toolkit for building server applications in Scala."
 ThisBuild / licenses := Seq("MIT" -> url("https://raw.githubusercontent.com/avast/scala-server-toolkit/master/LICENSE"))
 ThisBuild / developers := List(Developer("jakubjanecek", "Jakub Janecek", "[email protected]", url("https://www.avast.com")))
-ThisBuild / scmInfo := Some(
-  ScmInfo(url("https://github.com/avast/scala-server-toolkit"), "scm:git:[email protected]:avast/scala-server-toolkit.git")
-)
-
-ThisBuild / scalaVersion := "2.12.10"
-ThisBuild / scalacOptions := ScalacOptions.default
 
 ThisBuild / turbo := true
 
-lazy val commonSettings = Seq(
+lazy val commonSettings = BuildSettings.common ++ Seq(
   libraryDependencies ++= Seq(
-    compilerPlugin(Dependencies.kindProjector),
     Dependencies.catsEffect,
     Dependencies.logbackClassic % Test,
     Dependencies.scalaTest % Test
@@ -33,8 +26,8 @@ lazy val root = project
 lazy val example = project
   .dependsOn(jvmExecution, http4sBlazeClient, http4sBlazeServer, jvmSsl, jvmSystem, pureconfig)
   .enablePlugins(MdocPlugin)
+  .settings(commonSettings)
   .settings(
-    commonSettings,
     name := "scala-server-toolkit-example",
     publish / skip := true,
     run / fork := true,
@@ -92,8 +85,11 @@ lazy val jvmSystem = project
   )
 
 lazy val pureconfig = project
+  .settings(commonSettings)
   .settings(
-    commonSettings,
     name := "scala-server-toolkit-pureconfig",
     libraryDependencies += Dependencies.pureConfig
   )
+
+addCommandAlias("check", "; scalafmtSbtCheck; scalafmtCheckAll; compile:scalafix --check ; test:scalafix --check")
+addCommandAlias("fix", "; scalafmtSbt; scalafmtAll; compile:scalafix ; test:scalafix")

example/src/main/scala/com/avast/server/toolkit/example/Main.scala

@@ -7,6 +7,7 @@ import com.avast.server.toolkit.example.config.Configuration
 import com.avast.server.toolkit.execution.ExecutorModule
 import com.avast.server.toolkit.pureconfig.PureConfigModule
 import com.avast.server.toolkit.system.console.{Console, ConsoleModule}
+import com.github.ghik.silencer.silent
 import zio.interop.catz._
 import zio.{Task, ZIO}
 
@@ -15,7 +16,7 @@ object Main extends CatsApp {
   def program: Resource[Task, Unit] = {
 
     for {
-      configuration <- Resource.liftF(PureConfigModule.makeOrRaise[Task, Configuration])
+      _ <- Resource.liftF(PureConfigModule.makeOrRaise[Task, Configuration])
       executorModule <- ExecutorModule.makeFromExecutionContext[Task](runtime.Platform.executor.asEC)
       clock = Clock.create[Task]
       currentTime <- Resource.liftF(clock.realTime(TimeUnit.MILLISECONDS))
@@ -26,6 +27,7 @@ object Main extends CatsApp {
     } yield ()
   }
 
+  @silent("dead code") // false positive
   override def run(args: List[String]): ZIO[Environment, Nothing, Int] = {
     program
       .use(_ => Task.never)

jvm-ssl/src/main/scala/com/avast/server/toolkit/ssl/SslContextModule.scala

@@ -11,6 +11,7 @@ import javax.net.ssl.{KeyManager, KeyManagerFactory, SSLContext, TrustManager, T
 
 import scala.language.higherKinds
 
+@SuppressWarnings(Array("org.wartremover.warts.Null"))
 object SslContextModule {
 
   /** Loads [[javax.net.ssl.SSLContext]] and fills it with key/trust managers from the provided config. */

project/BuildSettings.scala

@@ -0,0 +1,41 @@
+import sbt.Keys._
+import sbt._
+import scalafix.sbt.ScalafixPlugin.autoImport._
+import wartremover.WartRemover.autoImport._
+
+object BuildSettings {
+  lazy val common = Seq(
+    ThisBuild / scalaVersion := "2.12.10",
+    libraryDependencies ++= Seq(
+      compilerPlugin(Dependencies.kindProjector),
+      compilerPlugin(Dependencies.silencer),
+      compilerPlugin(scalafixSemanticdb), // for scalafix
+      Dependencies.silencerLib
+    ),
+    Compile / compile / wartremoverErrors ++= Warts.all filterNot Set(
+      Wart.Nothing, // keep, false positives all around
+      Wart.Overloading,
+      Wart.Any, // keep, false positives all around
+      Wart.Equals, // keep, easier that way
+      Wart.ToString, // keep, easier that way
+      Wart.Product, // keep, false positives all around
+      Wart.Serializable, // keep, false positives all around
+      Wart.DefaultArguments // for constructors for PureConfig
+    ),
+    ThisBuild / scalafixDependencies ++= Seq(
+      Dependencies.scalazzi // https://github.com/scalaz/scalazzi
+    ),
+    scalacOptions ++= Seq(
+      "-Yrangepos", // for scalafix. required by SemanticDB compiler plugin
+      "-Ywarn-unused", // for scalafix. not present in sbt-tpolecat for 2.13
+      "-P:silencer:checkUnused"
+    ),
+    Test / publishArtifact := false,
+    Test / test / wartremoverErrors := (Compile / compile / wartremoverErrors).value filterNot Set(
+      Wart.MutableDataStructures,
+      Wart.OptionPartial,
+      Wart.AsInstanceOf,
+      Wart.EitherProjectionPartial
+    )
+  )
+}

project/Dependencies.scala

@@ -10,12 +10,16 @@ object Dependencies {
   val logbackClassic = "ch.qos.logback" % "logback-classic" % "1.2.3"
   val pureConfig = "com.github.pureconfig" %% "pureconfig" % "0.12.1"
   val scalaTest = "org.scalatest" %% "scalatest" % "3.0.8"
+  val scalazzi = "com.github.vovapolu" %% "scaluzzi" % "0.1.3"
+  val silencer = "com.github.ghik" % "silencer-plugin" % Versions.silencer cross CrossVersion.full
+  val silencerLib = "com.github.ghik" % "silencer-lib" % Versions.silencer cross CrossVersion.full
   val slf4jApi = "org.slf4j" % "slf4j-api" % "1.7.28"
   val zio = "dev.zio" %% "zio" % "1.0.0-RC13"
   val zioInteropCats = "dev.zio" %% "zio-interop-cats" % "2.0.0.0-RC4"
 
   object Versions {
 
+    val silencer = "1.4.4"
     val http4s = "0.20.11"
 
   }

project/plugins.sbt

@@ -3,3 +3,6 @@ addSbtPlugin("org.scalameta" % "sbt-mdoc" % "1.3.4")
 addSbtPlugin("com.geirsson" % "sbt-ci-release" % "1.4.31")
 addSbtPlugin("com.thoughtworks.sbt-api-mappings" % "sbt-api-mappings" % "3.0.0")
 addSbtPlugin("io.chrisdavenport" % "sbt-mima-version-check" % "0.1.2")
+addSbtPlugin("ch.epfl.scala" % "sbt-scalafix" % "0.9.7")
+addSbtPlugin("org.wartremover" % "sbt-wartremover" % "2.4.3")
+addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.1.8")