Move caching to after all configuration refinements and ...

move compilation cache setting to the scripting host configuration
The cache implementation can now take into account all external
dependencies that may appear during refinement.
Also change initial refinement location accordingly and rearrange
caching interfaces to make it available in scripting plugin.

libraries/scripting/jvm/src/kotlin/script/experimental/jvm/jvmScriptCaching.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.script.experimental.jvm
+
+import kotlin.script.experimental.api.CompiledScript
+import kotlin.script.experimental.api.ScriptCompilationConfiguration
+import kotlin.script.experimental.api.SourceCode
+import kotlin.script.experimental.util.PropertiesCollection
+
+interface CompiledJvmScriptsCache {
+    fun get(script: SourceCode, scriptCompilationConfiguration: ScriptCompilationConfiguration): CompiledScript<*>?
+    fun store(compiledScript: CompiledScript<*>, script: SourceCode, scriptCompilationConfiguration: ScriptCompilationConfiguration)
+
+    object NoCache : CompiledJvmScriptsCache {
+        override fun get(
+            script: SourceCode, scriptCompilationConfiguration: ScriptCompilationConfiguration
+        ): CompiledScript<*>? = null
+
+        override fun store(
+            compiledScript: CompiledScript<*>, script: SourceCode, scriptCompilationConfiguration: ScriptCompilationConfiguration
+        ) {
+        }
+    }
+}
+
+val JvmScriptingHostConfigurationKeys.compilationCache by PropertiesCollection.key<CompiledJvmScriptsCache>(isTransient = true)
+