Setup props once, fix initialization problem

libraries/examples/scripting/jvm-maven-deps/script/src/org/jetbrains/kotlin/script/examples/jvm/resolve/maven/scriptDef.kt

@@ -27,7 +27,7 @@ abstract class MyScriptWithMavenDeps {
 //    abstract fun body(vararg args: String): Int
 }
 
-object MyScriptProperties : ScriptingProperties() {
+class MyScriptProperties : ScriptingProperties() {
     override fun setup() {
         scriptDefinition {
             defaultImports<DependsOn>()

libraries/scripting/common/src/kotlin/script/experimental/api/propertiesDsl.kt

@@ -33,7 +33,12 @@ open class ScriptingProperties(body: ScriptingProperties.() -> Unit = {}) {
 
     init {
         body()
-        setup() // TODO: does it work?
+        setupOnce() // TODO: does it work?
+    }
+
+    private var isSetUp = false
+    fun setupOnce() {
+        if (!isSetUp) setup()
     }
 
     open fun setup() {}
@@ -78,7 +83,7 @@ open class ScriptingProperties(body: ScriptingProperties.() -> Unit = {}) {
     // inclusion:
 
     fun include(props: ScriptingProperties) {
-        props.setup()
+        props.setupOnce()
         data.putAll(props.data)
     }
 

libraries/scripting/common/src/kotlin/script/experimental/definitions/definitionFromAnnotation.kt

@@ -61,7 +61,7 @@ fun createScriptDefinitionFromAnnotatedBaseClass(
     }
 
     fun scriptingPropsInstance(kclass: KClass<out ScriptingProperties>): ScriptingProperties = try {
-        kclass.objectInstance ?: kclass.createInstance().also { it.setup() }
+        kclass.objectInstance ?: kclass.createInstance().also { it.setupOnce() }
     } catch (e: Throwable) {
         throw IllegalArgumentException(ILLEGAL_CONFIG_ANN_ARG, e)
     }