Sanitize scala doc string for open api gen (#3047)

zio-http/shared/src/main/scala/zio/http/Status.scala

@@ -40,7 +40,7 @@ sealed trait Status extends Product with Serializable { self =>
   lazy val text: String = code.toString
 
   /**
-   * Returns an Routes[Any, Nothing] that responses with this http status code.
+   * Returns a Routes[Any, Nothing] that responses with this http status code.
    */
   def toRoutes(implicit trace: Trace): Routes[Any, Nothing] =
     Handler.status(self).toRoutes

zio-http/shared/src/main/scala/zio/http/endpoint/openapi/JsonSchema.scala

@@ -618,7 +618,7 @@ object JsonSchema {
               .map(_.name),
           )
           .deprecated(deprecated(record))
-          .description(record.annotations.collectFirst { case description(value) => value })
+          .description(descriptionFromAnnotations(record.annotations))
       case collection: Schema.Collection[_, _]                                                    =>
         collection match {
           case Schema.Sequence(elementSchema, _, _, _, _)                =>
@@ -731,6 +731,18 @@ object JsonSchema {
 
     }
 
+  private def descriptionFromAnnotations(annotations: Chunk[Any]) = {
+    def sanitize(str: java.lang.String): java.lang.String =
+      str.linesIterator
+        .map(_.trim.stripPrefix("/**").stripPrefix("/*").stripSuffix("*/").stripPrefix("*").trim)
+        .filterNot(l => l == "\n" || l == "")
+        .mkString("\n")
+    annotations.collectFirst {
+      case description(value) if value.trim.startsWith("/*") => sanitize(value)
+      case description(value)                                => value
+    }
+  }
+
   sealed trait SchemaStyle extends Product with Serializable
   object SchemaStyle {
 
@@ -759,7 +771,7 @@ object JsonSchema {
     schema.annotations.exists(_.isInstanceOf[scala.deprecated])
 
   private def fieldDoc(schema: Schema.Field[_, _]): Option[java.lang.String] = {
-    val description0 = schema.annotations.collectFirst { case description(value) => value }
+    val description0 = descriptionFromAnnotations(schema.annotations)
     val defaultValue = schema.annotations.collectFirst { case fieldDefaultValue(value) => value }.map { _ =>
       s"${if (description0.isDefined) "\n" else ""}If not set, this field defaults to the value of the default annotation."
     }

zio-http/shared/src/test/scala-3/zio/http/endpoint/Scala3OpenAPIGenSpec.scala

@@ -82,6 +82,28 @@ object Scala3OpenAPIGenSpec extends ZIOSpecDefault {
           zio.http.endpoint.openapi.OpenAPIGen.gen(endpoint = testEndpoint)
           assertTrue(true)
         },
+        test("scala doc for api doc is sanetized") {
+          /**
+           * This is the Input documentation
+           */
+          final case class Input(a: String)
+
+          implicit val schema: Schema[Input] = DeriveSchema.gen[Input]
+
+          val testEndpoint =
+            (Endpoint(RoutePattern.POST / "test") ?? Doc.p("This is my 'POST /test' endpoint doc"))
+              .in[Input]
+              .out[String](mediaType = MediaType.application.json, doc = Doc.p("this is the output doc"))
+
+          val spec: String =
+            OpenAPIGen.fromEndpoints(
+              title = "This is my OpenAPI doc title",
+              version = "0.0.0",
+              endpoints = List(testEndpoint)
+              ).toJson
+
+          assertTrue(spec.contains(""""description":"This is the Input documentation""""))
+        }
       )
     )
 }