[Scala][sttp] various improvements (#5475)

* various improvements to scala sttp

* update ScalaSttpClientCodegen.java

* add windows batch file

* test scala sttp in jdk8

* fix tempalte directory

Author: wing328

README.md

@@ -27,6 +27,6 @@ fi
 
 # if you've executed sbt assembly previously it will use that instead.
 export JAVA_OPTS="${JAVA_OPTS} -Xmx1024M -DloggerPath=conf/log4j.properties"
-ags="generate --artifact-id "scala-sttp-petstore-client" -t modules/openapi-generator/src/main/resources/scala-sttp-client -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml -g scala-sttp -o samples/client/petstore/scala-sttp $@"
+ags="generate --artifact-id 'scala-sttp-petstore' -t modules/openapi-generator/src/main/resources/scala-sttp -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml -g scala-sttp -o samples/openapi3/client/petstore/scala-sttp $@"
 
 java $JAVA_OPTS -jar $executable $ags

bin/openapi3/scala-sttp-petstore.sh

@@ -0,0 +1,10 @@
+set executable=.\modules\openapi-generator-cli\target\openapi-generator-cli.jar
+
+If Not Exist %executable% (
+  mvn clean package
+)
+
+REM set JAVA_OPTS=%JAVA_OPTS% -Xmx1024M -DloggerPath=conf/log4j.properties
+set ags=generate --artifact-id "scala-sttp-petstore" -t modules\openapi-generator\src\main\resources\scala-sttp -i modules\openapi-generator\src\test\resources\3_0\petstore.yaml -g scala-sttp -o samples\openapi3\client\petstore\scala-sttp
+
+java %JAVA_OPTS% -jar %executable% %ags%

bin/openapi3/windows/scala-sttp-petstore.bat

@@ -1,10 +1,28 @@
+/*
+ * Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package org.openapitools.codegen.languages;
 
 import io.swagger.v3.oas.models.Operation;
 import io.swagger.v3.oas.models.servers.Server;
 import org.openapitools.codegen.CodegenConfig;
 import org.openapitools.codegen.CodegenOperation;
 import org.openapitools.codegen.SupportingFile;
+import org.openapitools.codegen.meta.GeneratorMetadata;
+import org.openapitools.codegen.meta.Stability;
 
 import java.io.File;
 import java.util.List;
@@ -14,8 +32,13 @@ public class ScalaSttpClientCodegen extends ScalaAkkaClientCodegen implements Co
 
     public ScalaSttpClientCodegen() {
         super();
-    }
+        generatorMetadata = GeneratorMetadata.newBuilder(generatorMetadata)
+                .stability(Stability.BETA)
+                .build();
 
+        embeddedTemplateDir = templateDir = "scala-sttp";
+        outputFolder = "generated-code/scala-sttp";
+    }
 
     @Override
     public void processOpts() {
@@ -52,13 +75,13 @@ public String getName() {
 
     @Override
     public String getHelp() {
-        return "Generates a Scala client library base on Sttp.";
+        return "Generates a Scala client library (beta) based on Sttp.";
     }
 
     @Override
     public String encodePath(String input) {
         String result = super.encodePath(input);
-        return result.replace("{","${");
+        return result.replace("{", "${");
     }
 
     @Override