scala 3 support

.github/workflows/ci.yaml

@@ -12,7 +12,8 @@ jobs:
     strategy:
       matrix:
         scala:
-          - 2.13.10
+          - 2.13.11
+          - 3.3.0
         java:
           - corretto@1.11
           - corretto@1.17

README.md

@@ -35,12 +35,11 @@ With your [signing secret](https://api.slack.com/authentication/verifying-reques
 
 ```scala
 import cats.effect.{IO, IOApp}
-import eu.timepit.refined.auto._
-import io.laserdisc.slack4s.slashcmd._
+import io.laserdisc.slack4s.slashcmd.*
 
 object MySlackBot extends IOApp.Simple {
 
-  val secret: SigningSecret = "your-signing-secret" // demo purposes - please don't hardcode secrets  
+  val secret: SigningSecret = SigningSecret.unsafeFrom("your-signing-secret") // demo purposes - please don't hardcode secrets  
 
   override def run: IO[Unit] = SlashCommandBotBuilder[IO](secret).serve
 

build.sbt

@@ -1,4 +1,8 @@
-ThisBuild / scalaVersion := "2.13.11"
+lazy val scala213               = "2.13.11"
+lazy val scala3                 = "3.3.0"
+lazy val supportedScalaVersions = List(scala213, scala3)
+ThisBuild / crossScalaVersions := supportedScalaVersions
+ThisBuild / scalaVersion       := scala213
 
 lazy val publishSettings = Seq(
   Test / publishArtifact := false,
@@ -11,7 +15,6 @@ lazy val publishSettings = Seq(
   scmInfo := Some(
     ScmInfo(
       url("https://github.com/laserdisc-io/slack4s/tree/master"),
-      "scm:git:git@github.com:laserdisc-io/slack4s.git",
       "scm:git:git@github.com:laserdisc-io/slack4s.git"
     )
   ),
@@ -26,26 +29,57 @@ lazy val root = project
     name := "slack4s",
     publishSettings,
     Seq(
-      addCompilerPlugin("com.olegpy" %% "better-monadic-for" % "0.3.1"),
+      libraryDependencies ++= Seq(
+        compilerPlugin(("org.typelevel" %% "kind-projector" % "0.13.2").cross(CrossVersion.full)),
+        compilerPlugin("com.olegpy" %% "better-monadic-for" % "0.3.1")
+      ).filterNot(_ => scalaVersion.value.startsWith("3.")),
       scalacOptions ++= Seq(
+        "-deprecation",
         "-encoding",
         "UTF-8",
-        "-deprecation",
-        "-unchecked",
         "-feature",
-        "-language:higherKinds",
-        "-language:implicitConversions",
-        "-language:postfixOps",
-        "-Xlint:_,-byname-implicit", // see https://github.com/scala/bug/issues/12072
+        "-language:existentials,experimental.macros,higherKinds,implicitConversions,postfixOps",
+        "-unchecked",
         "-Xfatal-warnings"
-      )
+      ),
+      scalacOptions ++= {
+        CrossVersion.partialVersion(scalaVersion.value) match {
+          case Some((2, minor)) if minor >= 13 =>
+            Seq(
+              "-Xlint:-unused,_",
+              "-Ywarn-numeric-widen",
+              "-Ywarn-value-discard",
+              "-Ywarn-unused:implicits",
+              "-Ywarn-unused:imports",
+              "-Xsource:3",
+              "-Xlint:-byname-implicit",
+              "-P:kind-projector:underscore-placeholders",
+              "-Xlint",
+              "-Ywarn-macros:after"
+            )
+          case _ => Seq.empty
+        }
+      },
+      scalacOptions ++= {
+        CrossVersion.partialVersion(scalaVersion.value) match {
+          case Some((3, _)) =>
+            Seq(
+              "-Ykind-projector:underscores",
+              "-source:future",
+              "-language:adhocExtensions",
+              "-Wconf:msg=`= _` has been deprecated; use `= uninitialized` instead.:s"
+            )
+          case _ => Seq.empty
+        }
+      }
     ),
     Test / fork := true,
     // ------------------------- deps -------------------------
     excludeDependencies += "commons-logging",
     Dependencies.TestLib,
     Dependencies.Circe,
     Dependencies.Refined,
+    Dependencies.NewTypes,
     Dependencies.Logging,
     Dependencies.Http4s,
     Dependencies.Slack,

docs/tutorial.md

@@ -104,13 +104,12 @@ Following the instructions on the [main README](../README.md), let's create a sl
 
 ```scala
 import cats.effect.{IO, IOApp}
-import eu.timepit.refined.auto._
-import io.laserdisc.slack4s.slashcmd._
+import io.laserdisc.slack4s.slashcmd.*
 
 object MySlackBot extends IOApp.Simple {
 
   // please don't hardcode secrets, this is just a demo
-  val secret: SigningSecret = "7e16-----redacted------68c2c"  
+  val secret: SigningSecret = SigningSecret.unsfeFrom("7e16-----redacted------68c2c")  
   
   override def run: IO[Unit] = SlashCommandBotBuilder[IO](secret).serve
 
@@ -145,10 +144,10 @@ If you're still getting `dispatch_failed` errors:
 We're going to use a simple [http4s](https://http4s.org/) client to make the API call, and [circe](https://circe.github.io/circe/) to decode the result.
 
 ```scala
-import io.circe.generic.auto._
+import io.circe.generic.auto.*
 import org.http4s.Method.GET
 import org.http4s.Uri.unsafeFromString
-import org.http4s._
+import org.http4s.*
 import org.http4s.blaze.client.BlazeClientBuilder
 import org.http4s.circe.CirceEntityCodec.circeEntityDecoder
 
@@ -185,7 +184,7 @@ as well as an interactive tool for quickly prototyping layouts.
 ```scala
 
 // helper functions for building the various block types in the slack LayoutBlock SDK
-import io.laserdisc.slack4s.slack._
+import io.laserdisc.slack4s.slack.*
 
 def formatNewsArticle(article: SpaceNewsArticle): Seq[LayoutBlock] =
   Seq(

project/Dependencies.scala

@@ -21,6 +21,10 @@ object Dependencies {
     libraryDependencies += "eu.timepit" %% "refined" % "0.11.0"
   )
 
+  val NewTypes = Seq(
+    libraryDependencies += "io.monix" %% "newtypes-core" % "0.2.3"
+  )
+
   val Logging = Seq(
     libraryDependencies ++= Seq(
       "org.typelevel" %% "log4cats-slf4j"  % "2.6.0",
@@ -44,11 +48,10 @@ object Dependencies {
   val CirceVersion = "0.14.5"
   val Circe = Seq(
     libraryDependencies ++= Seq(
-      "io.circe" %% "circe-core"           % CirceVersion,
-      "io.circe" %% "circe-parser"         % CirceVersion,
-      "io.circe" %% "circe-generic"        % CirceVersion,
-      "io.circe" %% "circe-generic-extras" % "0.14.3",
-      "io.circe" %% "circe-optics"         % "0.14.1"
+      "io.circe" %% "circe-core"   % CirceVersion,
+      "io.circe" %% "circe-parser" % CirceVersion
+//      "io.circe" %% "circe-generic"        % CirceVersion,
+//      "io.circe" %% "circe-optics"         % "0.14.1"
     )
   )
 

src/main/scala/io/laserdisc/slack4s/slack/internal/SlackAPIClient.scala

@@ -1,7 +1,7 @@
 package io.laserdisc.slack4s.slack.internal
 
 import cats.effect.{Async, Ref, Resource}
-import cats.implicits._
+import cats.implicits.*
 import com.slack.api.methods.request.chat.ChatPostMessageRequest
 import fs2.io.net.Network
 import org.http4s.client.Client
@@ -32,7 +32,7 @@ case class SlackResponseAccepted()
 
 case class SlackAPIClientImpl[F[_]: Async](httpClient: Client[F]) extends SlackAPIClient[F] {
 
-  private[this] val logger = Slf4jLogger.getLogger[F]
+  private val logger = Slf4jLogger.getLogger[F]
 
   override def respond(url: String, input: ChatPostMessageRequest): F[Unit] =
     for {

src/main/scala/io/laserdisc/slack4s/slack/internal/package.scala

@@ -1,7 +1,7 @@
 package io.laserdisc.slack4s.slack
 
 import cats.effect.{Async, Sync}
-import cats.implicits._
+import cats.implicits.*
 import com.google.gson.{FieldNamingPolicy, Gson, GsonBuilder}
 import com.slack.api.app_backend.slash_commands.payload.SlashCommandPayload
 import com.slack.api.methods.request.chat.ChatPostMessageRequest
@@ -10,12 +10,12 @@ import com.slack.api.model.block.composition.TextObject
 import com.slack.api.model.block.element.{BlockElement, RichTextElement}
 import com.slack.api.model.block.{ContextBlockElement, LayoutBlock}
 import com.slack.api.model.event.MessageChangedEvent.PreviousMessage
-import com.slack.api.util.json._
-import io.circe.parser._
+import com.slack.api.util.json.*
+import io.circe.parser.*
 import io.circe.{Decoder, Encoder}
-import org.http4s._
+import org.http4s.*
 import org.http4s.circe.jsonEncoderOf
-import org.http4s.FormDataDecoder._
+import org.http4s.FormDataDecoder.*
 
 import scala.util.Try
 
@@ -24,7 +24,7 @@ package object internal {
   /* The message classes that the slack SDK provides are intended for use with lombok & Gson. Rather
    * than build an entire family of circe codecs by hand, we delegate to Gson and use the gson factory
    * classes that are available in the slack SDK library. */
-  private[this] val gson: Gson = {
+  private val gson: Gson = {
     val gsonBuilder = new GsonBuilder
     gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
     Map(

src/main/scala/io/laserdisc/slack4s/slack/package.scala

@@ -2,12 +2,12 @@ package io.laserdisc.slack4s
 
 import com.slack.api.app_backend.slash_commands.payload.SlashCommandPayload
 import com.slack.api.methods.request.chat.ChatPostMessageRequest
-import com.slack.api.model.block._
-import com.slack.api.model.block.composition._
-import com.slack.api.model.block.element._
+import com.slack.api.model.block.*
+import com.slack.api.model.block.composition.*
+import com.slack.api.model.block.element.*
 import io.laserdisc.slack4s.slashcmd.URL
 
-import scala.jdk.CollectionConverters._
+import scala.jdk.CollectionConverters.*
 import scala.util.matching.Regex
 
 package object slack {

src/main/scala/io/laserdisc/slack4s/slashcmd/CommandMapper.scala

@@ -1,11 +1,10 @@
 package io.laserdisc.slack4s.slashcmd
 
 import cats.effect.Sync
-import cats.implicits._
+import cats.implicits.*
 import com.slack.api.app_backend.slash_commands.payload.SlashCommandPayload
-import eu.timepit.refined.auto._
 import io.laserdisc.slack4s.internal.ProjectRepo
-import io.laserdisc.slack4s.slack.canned._
+import io.laserdisc.slack4s.slack.canned.*
 import org.typelevel.log4cats.slf4j.Slf4jLogger.getLogger
 
 object CommandMapper {
@@ -21,7 +20,7 @@ object CommandMapper {
             )
             .as(helloFromSlack4s(payload)),
           responseType = Immediate,
-          logId = "GETTING-STARTED"
+          logId = LogToken.unsafeFrom("GETTING-STARTED")
         )
       }
   // $COVERAGE-ON$

src/main/scala/io/laserdisc/slack4s/slashcmd/Models.scala

@@ -1,7 +1,6 @@
 package io.laserdisc.slack4s.slashcmd
 
 import com.slack.api.methods.request.chat.ChatPostMessageRequest
-import eu.timepit.refined.auto._
 
 /** The description of a Command - an effect to be evaluated, providing a response (along with instructions on how to deliver the response.
   *
@@ -19,7 +18,7 @@ import eu.timepit.refined.auto._
 case class Command[F[_]](
     handler: F[ChatPostMessageRequest],
     responseType: ResponseType = Delayed,
-    logId: LogToken = "NA"
+    logId: LogToken = LogToken.unsafeFrom("NA")
 )
 
 /** Used by the http4s middleware when building a validated `AuthedRequest`

src/main/scala/io/laserdisc/slack4s/slashcmd/SlashCommandBotBuilder.scala

@@ -1,15 +1,15 @@
 package io.laserdisc.slack4s.slashcmd
 
-import cats.effect._
-import cats.implicits._
-import com.comcast.ip4s.{IpAddress, IpLiteralSyntax, Port}
-import eu.timepit.refined.auto._
+import cats.effect.*
+import cats.implicits.*
+import com.comcast.ip4s.*
 import fs2.io.net.Network
 import io.laserdisc.slack4s.slack.internal.SlackAPIClient
 import io.laserdisc.slack4s.slashcmd.SlashCommandBotBuilder.Defaults
-import io.laserdisc.slack4s.slashcmd.internal.SignatureValidator._
-import io.laserdisc.slack4s.slashcmd.internal._
-import org.http4s._
+import io.laserdisc.slack4s.slashcmd.internal.*
+import io.laserdisc.slack4s.slashcmd.internal.SignatureValidator.*
+import org.http4s.*
+import org.http4s.Uri.Path
 import org.http4s.dsl.Http4sDsl
 import org.http4s.ember.server.EmberServerBuilder
 import org.http4s.server.{Router, Server}
@@ -19,9 +19,9 @@ import org.typelevel.log4cats.slf4j.Slf4jLogger
 object SlashCommandBotBuilder {
 
   object Defaults {
-    val BindPort: Port             = port"8080"
-    val BindAddress: IpAddress     = ipv4"0.0.0.0"
-    val EndpointRoot: EndpointRoot = "/"
+    val BindPort: Port         = port"8080"
+    val BindAddress: IpAddress = ipv4"0.0.0.0"
+    val EndpointRoot: Path     = Path.Root
   }
 
   def apply[F[_]: Async: Network](signingSecret: SigningSecret): SlashCommandBotBuilder[F] =
@@ -32,23 +32,23 @@ class SlashCommandBotBuilder[F[_]: Async: Network] private[slashcmd] (
     signingSecret: SigningSecret,
     bindPort: Port = Defaults.BindPort,
     bindAddress: IpAddress = Defaults.BindAddress,
-    endpointRoot: EndpointRoot = Defaults.EndpointRoot,
+    endpointRoot: Path = Defaults.EndpointRoot,
     commandParser: Option[CommandMapper[F]] = None,
     additionalRoutes: Option[HttpRoutes[F]] = None,
     http4sBuilder: EmberServerBuilder[F] => EmberServerBuilder[F] = (b: EmberServerBuilder[F]) => b
 ) {
   type Self = SlashCommandBotBuilder[F]
 
-  private[this] val logger: Logger[F] = Slf4jLogger.getLogger[F]
+  private val logger: Logger[F] = Slf4jLogger.getLogger[F]
 
-  private[this] val dsl = Http4sDsl[F]
-  import dsl._
+  private val dsl = Http4sDsl[F]
+  import dsl.*
 
-  private[this] def copy(
+  private def copy(
       signingSecret: SigningSecret = signingSecret,
       bindPort: Port = bindPort,
       bindAddress: IpAddress = bindAddress,
-      endpointRoot: EndpointRoot = endpointRoot,
+      endpointRoot: Path = endpointRoot,
       commandParser: Option[CommandMapper[F]] = commandParser,
       additionalRoutes: Option[HttpRoutes[F]] = additionalRoutes,
       http4sBuilder: EmberServerBuilder[F] => EmberServerBuilder[F] = http4sBuilder
@@ -66,7 +66,7 @@ class SlashCommandBotBuilder[F[_]: Async: Network] private[slashcmd] (
   def withBindOptions(port: Port, address: IpAddress = Defaults.BindAddress): Self =
     copy(bindPort = port, bindAddress = address)
 
-  def withEndpointRoot(root: EndpointRoot): Self =
+  def withEndpointRoot(root: Path): Self =
     copy(endpointRoot = root)
 
   def withAdditionalRoutes(routes: HttpRoutes[F]): Self =
@@ -120,10 +120,10 @@ class SlashCommandBotBuilder[F[_]: Async: Network] private[slashcmd] (
   def buildHttpApp(cmdRunner: CommandRunner[F], additionalRoutes: Option[HttpRoutes[F]] = None): HttpApp[F] = {
 
     val botRoutes = Router(
-      s"${endpointRoot.value}healthCheck" -> HttpRoutes.of[F] { case GET -> Root =>
+      s"${endpointRoot}healthCheck" -> HttpRoutes.of[F] { case GET -> Root =>
         Ok.apply(s"OK")
       },
-      s"${endpointRoot.value}slack" -> withValidSignature(signingSecret).apply(
+      s"${endpointRoot}slack" -> withValidSignature(signingSecret).apply(
         AuthedRoutes.of[SlackUser, F] { case req @ POST -> Root / "slashCmd" as _ =>
           cmdRunner.processRequest(req)
         }