gradle.kts: improve service initializtion

- prevent analyzing .gradle.kts files until all services are loaded
- remove services caches where it is not required
- replace cached services with cache only during vfs events batch processing
- prevent services loading in actions updating

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/ScriptConfigurationManager.kt

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.idea.core.script
 
 import com.intellij.openapi.components.ServiceManager
+import com.intellij.openapi.components.serviceIfCreated
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.projectRoots.Sdk
 import com.intellij.openapi.util.Key
@@ -108,6 +109,9 @@ interface ScriptConfigurationManager {
     fun getAllScriptDependenciesSources(): List<VirtualFile>
 
     companion object {
+        fun getServiceIfCreated(project: Project): ScriptConfigurationManager? =
+            ServiceManager.getServiceIfCreated(project, ScriptConfigurationManager::class.java)
+
         @JvmStatic
         fun getInstance(project: Project): ScriptConfigurationManager =
             ServiceManager.getService(project, ScriptConfigurationManager::class.java)

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/ScriptDefinitionsManager.kt

@@ -84,7 +84,9 @@ class ScriptDefinitionsManager(private val project: Project) : LazyScriptDefinit
     private val scriptDefinitionsCacheLock = ReentrantLock()
     private val scriptDefinitionsCache = SLRUMap<String, ScriptDefinition>(10, 10)
 
-    val configurations = (ScriptConfigurationManager.getInstance(project) as CompositeScriptConfigurationManager)
+    // cache service as it's getter is on the hot path
+    // it is safe, since both services are in same plugin
+    val configurations = ScriptConfigurationManager.getInstance(project) as CompositeScriptConfigurationManager
 
     override fun findDefinition(script: SourceCode): ScriptDefinition? {
         val locationId = script.locationId ?: return null

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/ScriptTrafficLightRendererContributor.kt

@@ -27,10 +27,16 @@ class ScriptTrafficLightRendererContributor : TrafficLightRendererContributor {
         TrafficLightRenderer(project, document, file) {
         override fun getDaemonCodeAnalyzerStatus(severityRegistrar: SeverityRegistrar): DaemonCodeAnalyzerStatus {
             val status = super.getDaemonCodeAnalyzerStatus(severityRegistrar)
-            if (!ScriptDefinitionsManager.getInstance(file.project).isReady()) {
+
+            val configurations = ScriptConfigurationManager.getServiceIfCreated(project)
+            if (configurations == null) {
+                // services not yet initialized (it should be initialized under the LoadScriptDefinitionsStartupActivity)
+                status.reasonWhySuspended = KotlinIdeaCoreBundle.message("text.loading.kotlin.script.configuration")
+                status.errorAnalyzingFinished = false
+            } else if (!ScriptDefinitionsManager.getInstance(file.project).isReady()) {
                 status.reasonWhySuspended = KotlinIdeaCoreBundle.message("text.loading.kotlin.script.definitions")
                 status.errorAnalyzingFinished = false
-             } else if (ScriptConfigurationManager.getInstance(project).isConfigurationLoadingInProgress(file)) {
+            } else if (configurations.isConfigurationLoadingInProgress(file)) {
                 status.reasonWhySuspended = KotlinIdeaCoreBundle.message("text.loading.kotlin.script.configuration")
                 status.errorAnalyzingFinished = false
             }

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/configuration/CompositeScriptConfigurationManager.kt

@@ -49,7 +49,8 @@ class CompositeScriptConfigurationManager(val project: Project) : ScriptConfigur
     private val classpathRoots: ScriptClassRootsCache
         get() = updater.classpathRoots
 
-    private val plugins = ScriptingSupport.EPN.getPoint(project).extensionList
+    private val plugins
+        get() = ScriptingSupport.EPN.getPoint(project).extensionList
 
     val default = DefaultScriptingSupport(this)
 

idea/idea-core/src/org/jetbrains/kotlin/idea/core/script/configuration/listener/ScriptChangesNotifier.kt

@@ -83,10 +83,11 @@ internal class ScriptChangesNotifier(
     }
 
     private val defaultListener = DefaultScriptChangeListener(project)
-    private val listeners: Collection<ScriptChangeListener> = mutableListOf<ScriptChangeListener>().apply {
-        addAll(LISTENER.getPoint(project).extensionList)
-        add(defaultListener)
-    }
+    private val listeners: Collection<ScriptChangeListener>
+        get() = mutableListOf<ScriptChangeListener>().apply {
+            addAll(LISTENER.getPoint(project).extensionList)
+            add(defaultListener)
+        }
 
     private fun getListener(project: Project, file: VirtualFile): ScriptChangeListener? {
         if (project.isDisposed || areListenersDisabled()) return null