Scripting: avoid just in case configuration requests to Gradle (KT-34442)

Listen to changes in files that may affect gradle configuration
Remove configuration request if none of such file was changed since last request
^KT-34442 Fixed

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

@@ -24,6 +24,7 @@ import org.jetbrains.annotations.TestOnly
 import org.jetbrains.kotlin.idea.core.script.*
 import org.jetbrains.kotlin.idea.core.script.ScriptConfigurationManager.Companion.toVfsRoots
 import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationCache
+import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationCacheScope
 import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationSnapshot
 import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationState
 import org.jetbrains.kotlin.idea.core.script.configuration.listener.ScriptConfigurationUpdater
@@ -130,13 +131,8 @@ internal abstract class AbstractScriptConfigurationManager(
             return reloadIfOutOfDate(files, false)
         }
 
-        override fun forceConfigurationReload(file: KtFile) {
-            val virtualFile = file.originalFile.virtualFile ?: return
-            cache.markOutOfDate(virtualFile)
-
-            rootsIndexer.transaction {
-                reloadOutOfDateConfiguration(file, loadEvenWillNotBeApplied = true)
-            }
+        override fun postponeConfigurationReload(scope: ScriptConfigurationCacheScope) {
+            cache.markOutOfDate(scope)
         }
     }
 

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

@@ -9,7 +9,6 @@ import com.intellij.codeInsight.daemon.DaemonCodeAnalyzer
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.components.ServiceManager
 import com.intellij.openapi.extensions.ExtensionPointName
-import com.intellij.openapi.extensions.Extensions
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.psi.PsiManager
@@ -18,12 +17,9 @@ import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import org.jetbrains.kotlin.idea.core.script.*
 import org.jetbrains.kotlin.idea.core.script.configuration.DefaultScriptConfigurationManagerExtensions.LOADER
-import org.jetbrains.kotlin.idea.core.script.configuration.DefaultScriptConfigurationManagerExtensions.LISTENER
 import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationFileAttributeCache
 import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationMemoryCache
 import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationSnapshot
-import org.jetbrains.kotlin.idea.core.script.configuration.listener.DefaultScriptChangeListener
-import org.jetbrains.kotlin.idea.core.script.configuration.listener.ScriptChangeListener
 import org.jetbrains.kotlin.idea.core.script.configuration.listener.ScriptChangesNotifier
 import org.jetbrains.kotlin.idea.core.script.configuration.listener.ScriptConfigurationUpdater
 import org.jetbrains.kotlin.idea.core.script.configuration.loader.DefaultScriptConfigurationLoader
@@ -119,14 +115,7 @@ internal class DefaultScriptConfigurationManager(project: Project) :
             yield(defaultLoader)
         }
 
-    private val defaultListener = DefaultScriptChangeListener()
-    private val listeners: Sequence<ScriptChangeListener>
-        get() = sequence {
-            yieldAll(LISTENER.getPoint(project).extensionList)
-            yield(defaultListener)
-        }
-
-    private val notifier = ScriptChangesNotifier(project, updater, listeners)
+    private val notifier = ScriptChangesNotifier(project, updater)
 
     private val saveLock = ReentrantLock()
 
@@ -322,9 +311,6 @@ internal class DefaultScriptConfigurationManager(project: Project) :
 object DefaultScriptConfigurationManagerExtensions {
     val LOADER: ExtensionPointName<ScriptConfigurationLoader> =
         ExtensionPointName.create("org.jetbrains.kotlin.scripting.idea.loader")
-
-    val LISTENER: ExtensionPointName<ScriptChangeListener> =
-        ExtensionPointName.create("org.jetbrains.kotlin.scripting.idea.listener")
 }
 
 val ScriptConfigurationManager.testingBackgroundExecutor

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

@@ -29,12 +29,18 @@ interface ScriptConfigurationCache {
 
     fun setApplied(file: VirtualFile, configurationSnapshot: ScriptConfigurationSnapshot)
     fun setLoaded(file: VirtualFile, configurationSnapshot: ScriptConfigurationSnapshot)
-    fun markOutOfDate(file: VirtualFile)
+    fun markOutOfDate(scope: ScriptConfigurationCacheScope)
 
     fun allApplied(): Collection<Pair<VirtualFile, ScriptCompilationConfigurationWrapper>>
     fun clear()
 }
 
+sealed class ScriptConfigurationCacheScope {
+    object All : ScriptConfigurationCacheScope()
+    class File(val file: KtFile) : ScriptConfigurationCacheScope()
+    class Except(val file: KtFile) : ScriptConfigurationCacheScope()
+}
+
 data class ScriptConfigurationState(
     val applied: ScriptConfigurationSnapshot? = null,
     val loaded: ScriptConfigurationSnapshot? = null

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

@@ -37,14 +37,26 @@ open class ScriptConfigurationMemoryCache(
     }
 
     @Synchronized
-    override fun markOutOfDate(file: VirtualFile) {
-        val old = memoryCache[file] ?: ScriptConfigurationState()
-        memoryCache.put(
-            file, old.copy(
-                applied = old.applied?.copy(inputs = CachedConfigurationInputs.OutOfDate),
-                loaded = old.loaded?.copy(inputs = CachedConfigurationInputs.OutOfDate)
-            )
-        )
+    override fun markOutOfDate(scope: ScriptConfigurationCacheScope) {
+        when (scope) {
+            is ScriptConfigurationCacheScope.File -> {
+                val file = scope.file.originalFile.virtualFile
+                markFileOutOfDate(file)
+            }
+            is ScriptConfigurationCacheScope.Except -> {
+                val file = scope.file.originalFile.virtualFile
+                memoryCache.entrySet().forEach {
+                    if (it.key != file) {
+                        markFileOutOfDate(it.key)
+                    }
+                }
+            }
+            is ScriptConfigurationCacheScope.All ->{
+                memoryCache.entrySet().forEach {
+                    markFileOutOfDate(it.key)
+                }
+            }
+        }
     }
 
     @Synchronized
@@ -59,4 +71,15 @@ open class ScriptConfigurationMemoryCache(
     override fun clear() {
         memoryCache.clear()
     }
+
+    @Synchronized
+    private fun markFileOutOfDate(file: VirtualFile) {
+        val old = memoryCache[file] ?: return
+        memoryCache.put(
+            file, old.copy(
+                applied = old.applied?.copy(inputs = CachedConfigurationInputs.OutOfDate),
+                loaded = old.loaded?.copy(inputs = CachedConfigurationInputs.OutOfDate)
+            )
+        )
+    }
 }

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

@@ -4,16 +4,22 @@
  */
 package org.jetbrains.kotlin.idea.core.script.configuration.listener
 
-import org.jetbrains.kotlin.psi.KtFile
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFile
+import org.jetbrains.kotlin.scripting.definitions.isNonScript
 
-open class DefaultScriptChangeListener : ScriptChangeListener {
-    override fun editorActivated(file: KtFile, updater: ScriptConfigurationUpdater): Boolean {
+open class DefaultScriptChangeListener(project: Project) : ScriptChangeListener(project) {
+    override fun editorActivated(vFile: VirtualFile, updater: ScriptConfigurationUpdater) {
+        val file = getAnalyzableKtFileForScript(vFile) ?: return
         updater.ensureUpToDatedConfigurationSuggested(file)
-        return true
     }
 
-    override fun documentChanged(file: KtFile, updater: ScriptConfigurationUpdater): Boolean {
+    override fun documentChanged(vFile: VirtualFile, updater: ScriptConfigurationUpdater) {
+        val file = getAnalyzableKtFileForScript(vFile) ?: return
         updater.ensureUpToDatedConfigurationSuggested(file)
-        return true
+    }
+
+    override fun isApplicable(vFile: VirtualFile): Boolean {
+        return vFile.isValid && !vFile.isNonScript()
     }
 }

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

@@ -5,18 +5,37 @@
 
 package org.jetbrains.kotlin.idea.core.script.configuration.listener
 
-import org.jetbrains.kotlin.psi.KtFile
+import com.intellij.openapi.extensions.ExtensionPointName
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.psi.PsiManager
 import org.jetbrains.kotlin.idea.core.script.configuration.DefaultScriptConfigurationManager
+import org.jetbrains.kotlin.idea.util.ProjectRootsUtil
+import org.jetbrains.kotlin.psi.KtFile
 
 /**
  * [ScriptChangesNotifier] will call first applicable [ScriptChangeListener] when editor is activated or document changed.
- * (it treated as applicable if [editorActivated] or [documentChanged] will return true).
  *
  * Listener may call [ScriptConfigurationUpdater] to invalidate configuration and schedule reloading.
  *
  * @see DefaultScriptConfigurationManager for more details.
  */
-interface ScriptChangeListener {
-    fun editorActivated(file: KtFile, updater: ScriptConfigurationUpdater): Boolean
-    fun documentChanged(file: KtFile, updater: ScriptConfigurationUpdater): Boolean
+abstract class ScriptChangeListener(protected val project: Project) {
+    abstract fun editorActivated(vFile: VirtualFile, updater: ScriptConfigurationUpdater)
+    abstract fun documentChanged(vFile: VirtualFile, updater: ScriptConfigurationUpdater)
+
+    abstract fun isApplicable(vFile: VirtualFile): Boolean
+
+    protected fun getAnalyzableKtFileForScript(vFile: VirtualFile): KtFile? {
+        if (project.isDisposed) return null
+
+        return (PsiManager.getInstance(project).findFile(vFile) as? KtFile)?.takeIf {
+            ProjectRootsUtil.isInProjectSource(it, includeScriptsOutsideSourceRoots = true)
+        }
+    }
+
+    companion object {
+        val LISTENER: ExtensionPointName<ScriptChangeListener> =
+            ExtensionPointName.create("org.jetbrains.kotlin.scripting.idea.listener")
+    }
 }

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

@@ -15,17 +15,13 @@ import com.intellij.openapi.fileEditor.FileEditorManagerEvent
 import com.intellij.openapi.fileEditor.FileEditorManagerListener
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFile
-import com.intellij.psi.PsiManager
 import com.intellij.util.Alarm
+import org.jetbrains.kotlin.idea.core.script.configuration.listener.ScriptChangeListener.Companion.LISTENER
 import org.jetbrains.kotlin.idea.core.script.isScriptChangesNotifierDisabled
-import org.jetbrains.kotlin.idea.util.ProjectRootsUtil
-import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.scripting.definitions.isNonScript
 
 internal class ScriptChangesNotifier(
     private val project: Project,
-    private val updater: ScriptConfigurationUpdater,
-    private val listeners: Sequence<ScriptChangeListener>
+    private val updater: ScriptConfigurationUpdater
 ) {
     private val scriptsQueue = Alarm(Alarm.ThreadToUse.SWING_THREAD, project)
     private val scriptChangesListenerDelay = 1400
@@ -45,9 +41,7 @@ internal class ScriptChangesNotifier(
             }
 
             private fun runScriptDependenciesUpdateIfNeeded(file: VirtualFile) {
-                val ktFile = getKtFileToStartConfigurationUpdate(file) ?: return
-
-                listeners.first { it.editorActivated(ktFile, updater) }
+                getListener(project, file)?.editorActivated(file, updater)
             }
         })
 
@@ -55,12 +49,12 @@ internal class ScriptChangesNotifier(
             override fun documentChanged(event: DocumentEvent) {
                 val document = event.document
                 val file = FileDocumentManager.getInstance().getFile(document)?.takeIf { it.isInLocalFileSystem } ?: return
-                val ktFile = getKtFileToStartConfigurationUpdate(file) ?: return
+
+                val listener = getListener(project, file) ?: return
 
                 scriptsQueue.cancelAllRequests()
-
                 scriptsQueue.addRequest(
-                    { listeners.first { it.documentChanged(ktFile, updater) } },
+                    { listener.documentChanged(file, updater) },
                     scriptChangesListenerDelay,
                     true
                 )
@@ -68,23 +62,20 @@ internal class ScriptChangesNotifier(
         }, project.messageBus.connect())
     }
 
-    private fun getKtFileToStartConfigurationUpdate(file: VirtualFile): KtFile? {
-        if (project.isDisposed || !file.isValid || file.isNonScript()) {
-            return null
+    private val defaultListener = DefaultScriptChangeListener(project)
+    private val listeners: Sequence<ScriptChangeListener>
+        get() = sequence {
+            yieldAll(LISTENER.getPoint(project).extensionList)
+            yield(defaultListener)
         }
 
-        if (
-            ApplicationManager.getApplication().isUnitTestMode &&
-            ApplicationManager.getApplication().isScriptChangesNotifierDisabled == true
-        ) {
-            return null
-        }
+    private fun getListener(project: Project, file: VirtualFile): ScriptChangeListener? {
+        if (project.isDisposed || areListenersDisabled()) return null
 
-        val ktFile = PsiManager.getInstance(project).findFile(file) as? KtFile ?: return null
-        if (ProjectRootsUtil.isInProjectSource(ktFile, includeScriptsOutsideSourceRoots = true)) {
-            return ktFile
-        }
-
-        return null
+        return listeners.firstOrNull { it.isApplicable(file) }
     }
-}
+
+    private fun areListenersDisabled(): Boolean {
+        return ApplicationManager.getApplication().isUnitTestMode && ApplicationManager.getApplication().isScriptChangesNotifierDisabled == true
+    }
+}

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

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.idea.core.script.configuration.listener
 
+import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationCacheScope
 import org.jetbrains.kotlin.psi.KtFile
 
 interface ScriptConfigurationUpdater {
@@ -24,7 +25,7 @@ interface ScriptConfigurationUpdater {
     fun ensureConfigurationUpToDate(files: List<KtFile>): Boolean
 
     /**
-     * Invalidate current configuration and start loading new
+     * Invalidate current configuration
      */
-    fun forceConfigurationReload(file: KtFile)
+    fun postponeConfigurationReload(scope: ScriptConfigurationCacheScope)
 }

idea/idea-gradle/src/org/jetbrains/kotlin/idea/scripting/gradle/GradleScriptListener.kt

@@ -5,24 +5,49 @@
 
 package org.jetbrains.kotlin.idea.scripting.gradle
 
-import org.jetbrains.kotlin.idea.core.script.configuration.listener.DefaultScriptChangeListener
+import com.intellij.openapi.externalSystem.util.ExternalSystemApiUtil
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.vfs.VirtualFile
+import org.jetbrains.kotlin.idea.core.script.configuration.cache.ScriptConfigurationCacheScope
+import org.jetbrains.kotlin.idea.core.script.configuration.listener.ScriptChangeListener
 import org.jetbrains.kotlin.idea.core.script.configuration.listener.ScriptConfigurationUpdater
-import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.plugins.gradle.GradleManager
+import org.jetbrains.plugins.gradle.settings.GradleProjectSettings
+import org.jetbrains.plugins.gradle.util.GradleConstants
 
-class GradleScriptListener : DefaultScriptChangeListener() {
-    private val listenGradleRelatedFiles = false // todo
+class GradleScriptListener(project: Project) : ScriptChangeListener(project) {
 
-    override fun editorActivated(file: KtFile, updater: ScriptConfigurationUpdater): Boolean {
-        if (!isGradleKotlinScript(file.virtualFile)) return false
-        if (listenGradleRelatedFiles) {
-            updater.ensureUpToDatedConfigurationSuggested(file)
-            // todo: force reload if related files changed
+    override fun editorActivated(vFile: VirtualFile, updater: ScriptConfigurationUpdater) {
+        if (!isGradleKotlinScript(vFile)) return
+
+        if (useScriptConfigurationFromImportOnly()) {
+            // do nothing
         } else {
-            // configuration will be reloaded after editor activation, even it is already up-to-date
-            // this is required for Gradle scripts, since it's classpath may depend on other files (`.properties` for example)
-            updater.forceConfigurationReload(file)
+            val file = getAnalyzableKtFileForScript(vFile) ?: return
+            updater.ensureUpToDatedConfigurationSuggested(file)
         }
+    }
 
-        return true
+    override fun documentChanged(vFile: VirtualFile, updater: ScriptConfigurationUpdater) {
+        val file = getAnalyzableKtFileForScript(vFile)
+        if (file != null) {
+            // *.gradle.kts file was changed
+            updater.ensureUpToDatedConfigurationSuggested(file)
+            updater.postponeConfigurationReload(ScriptConfigurationCacheScope.Except(file))
+        } else {
+            updater.postponeConfigurationReload(ScriptConfigurationCacheScope.All)
+        }
+    }
+
+    override fun isApplicable(vFile: VirtualFile): Boolean {
+        val gradleSettings = ExternalSystemApiUtil.getSettings(project, GradleConstants.SYSTEM_ID)
+        if (gradleSettings.getLinkedProjectsSettings().isEmpty()) return false
+
+        val projectSettings = gradleSettings.getLinkedProjectsSettings().filterIsInstance<GradleProjectSettings>().firstOrNull()
+            ?: return false
+
+        val affectedFiles = ExternalSystemApiUtil.getAllManagers().filterIsInstance<GradleManager>().firstOrNull()
+            ?.getAffectedExternalProjectFiles(projectSettings.externalProjectPath, project)
+        return affectedFiles?.any { it.path == vFile.path } == true
     }
 }