Move kotlin extensions to reactor-kotlin-extensions

build.gradle

@@ -15,13 +15,11 @@
  */
 
 buildscript {
-  ext.kotlinVersion = '1.1.61'
   repositories {
 	maven { url "https://repo.spring.io/plugins-release" }
   }
   dependencies {
-	classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}",
-			'org.springframework.build.gradle:propdeps-plugin:0.0.7',
+	classpath 'org.springframework.build.gradle:propdeps-plugin:0.0.7',
 			'io.spring.gradle:spring-io-plugin:0.0.4.RELEASE'
   }
 }
@@ -78,7 +76,6 @@ configure(subprojects) { project ->
 
   apply plugin: 'propdeps'
   apply plugin: 'java'
-  apply plugin: 'kotlin'
   apply from: "${gradleScriptDir}/ide.gradle"
 
   [compileJava, compileTestJava]*.options*.compilerArgs = ["-Xlint:varargs",
@@ -111,22 +108,6 @@ configure(subprojects) { project ->
 	targetCompatibility = 1.8
   }
 
-  compileKotlin {
-	kotlinOptions.jvmTarget = "1.8"
-	kotlinOptions.freeCompilerArgs = ["-Xjsr305=strict"]
-  }
-
-  compileTestKotlin {
-	kotlinOptions.jvmTarget = "1.8"
-	kotlinOptions.freeCompilerArgs = ["-Xjsr305=strict"]
-  }
-
-  // now that kotlin-gradle-plugin 1.1.60 is out with fix for https://youtrack.jetbrains.com/issue/KT-17564
-  // be wary and fail if the issue of source file duplication in jar comes up again
-  sourcesJar {
-	duplicatesStrategy = DuplicatesStrategy.FAIL
-  }
-
   if (JavaVersion.current().isJava8Compatible()) {
 	compileTestJava.options.compilerArgs += "-parameters"
 	tasks.withType(Javadoc) {
@@ -210,8 +191,6 @@ project('reactor-adapter') {
 
 	optional "com.typesafe.akka:akka-actor_2.11:$akkaActorVersion"
 
-	optional "org.jetbrains.kotlin:kotlin-stdlib:${kotlinVersion}"
-
 	testCompile "org.reactivestreams:reactive-streams-tck:1.0.2"
   }
 
@@ -234,7 +213,8 @@ project('reactor-extra') {
 
   dependencies {
 	optional "org.eclipse.swt:org.eclipse.swt.${getPlatform()}:${swtVersionPlatform}"
-	optional("org.jetbrains.kotlin:kotlin-stdlib:${kotlinVersion}")
+	testCompile "org.reactivestreams:reactive-streams-tck:1.0.2"
+	testCompile "org.mockito:mockito-core:2.23.0"
   }
 
   jar {