Scala 3 warnings as errors

Author: farmdawgnation

core/src/main/scala/as/core.scala

@@ -6,6 +6,7 @@ import org.asynchttpclient
 import org.asynchttpclient.handler.resumable._
 import java.io._
 import java.nio.charset.Charset
+import java.io.Closeable
 
 object Response {
   def apply[T](f: asynchttpclient.Response => T) = f
@@ -36,7 +37,7 @@ object File extends {
     val resumableHandler = new ResumableAsyncHandler
         with OkHandler[asynchttpclient.Response]
         with CloseResourcesOnThrowableHandler[asynchttpclient.Response] {
-      override lazy val closeable = Seq(fileHandler)
+      override lazy val closeable: Seq[Closeable] = Seq(fileHandler)
     }
 
     resumableHandler

core/src/main/scala/defaults.scala

@@ -28,7 +28,7 @@ private[dispatch] object InternalDefaults {
 
   /** Sets a user agent, no timeout for requests  */
   private object BasicDefaults extends Defaults {
-    lazy val timer = new HashedWheelTimer()
+    lazy val timer: Timer = new HashedWheelTimer()
 
     private val userAgent = "Dispatch/%s" format BuildInfo.version
     private val infinite = Duration.ofMillis(-1)

core/src/main/scala/execution.scala

@@ -13,7 +13,7 @@ case class Http(
 ) extends HttpExecutor {
   import DefaultAsyncHttpClientConfig.Builder
 
-  lazy val client = new DefaultAsyncHttpClient(clientBuilder.build)
+  lazy val client: AsyncHttpClient = new DefaultAsyncHttpClient(clientBuilder.build)
 
   /**
    * Returns a new instance replacing the underlying `clientBuilder` with a new instance that is

jsoup/src/main/scala/as/soup.scala

@@ -13,7 +13,7 @@ object Query {
   import org.jsoup.select.Elements
   def apply(query: String): Response => Elements =
     Document(_).select(query)
-} 
+}
 
 object Clean {
   import org.jsoup.safety.Whitelist

project/common.scala

@@ -26,11 +26,11 @@ object Common {
       "-unchecked",
       "-language:higherKinds",
       "-language:implicitConversions",
-      // "-Xfatal-warnings",
       "-Xlint",
       "-Ywarn-dead-code",
       "-Ywarn-numeric-widen",
-      "-Ywarn-value-discard"
+      "-Ywarn-value-discard",
+      "-Xsource:3"
     ),
 
     Compile / scalacOptions ++= {

tagsoup/src/main/scala/as/soup.scala

@@ -9,6 +9,6 @@ import org.ccil.cowan.tagsoup.jaxp.SAXFactoryImpl
 object NodeSeq extends (Response => XNodeSeq) {
   lazy val parserFactory = new SAXFactoryImpl
   lazy val adapter = new NoBindingFactoryAdapter
-  def apply(r: Response) =
+  def apply(r: Response): scala.xml.NodeSeq =
     adapter.loadXML(new InputSource(r.getResponseBodyAsStream), parserFactory.newSAXParser)
 }