[kotlin] invalidate LanguageVersionSettings on facet changes

^KTIJ-23779 Fixed

GitOrigin-RevId: ff784bd7e196ef25247d8061a98d4d3b486be00d

plugins/kotlin/base/project-structure/src/org/jetbrains/kotlin/idea/base/projectStructure/LanguageVersionSettingsProvider.kt

@@ -35,6 +35,7 @@ import org.jetbrains.kotlin.platform.jvm.JvmPlatforms
 import org.jetbrains.kotlin.util.merge
 import java.util.*
 import org.jetbrains.kotlin.idea.compiler.configuration.KotlinCompilerSettingsListener
+import org.jetbrains.kotlin.idea.facet.KotlinFacetModificationTracker
 
 private typealias LanguageFeatureMap = Map<LanguageFeature, LanguageFeature.State>
 private typealias AnalysisFlagMap = Map<AnalysisFlag<*>, Any>
@@ -107,6 +108,7 @@ class LanguageVersionSettingsProvider(private val project: Project) : Disposable
                 computeModuleLanguageVersionSettings(module),
                 KotlinCompilerSettingsTracker.getInstance(project),
                 ProjectRootModificationTracker.getInstance(project),
+                KotlinFacetModificationTracker.getInstance(project),
             )
         }
     }

plugins/kotlin/idea/tests/test/org/jetbrains/kotlin/idea/configuration/ConfigureKotlinInTempDirTest.kt

@@ -21,6 +21,7 @@ import org.jetbrains.kotlin.idea.compiler.configuration.Kotlin2JsCompilerArgumen
 import org.jetbrains.kotlin.idea.compiler.configuration.KotlinCommonCompilerArgumentsHolder
 import org.jetbrains.kotlin.idea.compiler.configuration.KotlinJpsPluginSettings
 import org.jetbrains.kotlin.idea.compiler.configuration.KotlinPluginLayout
+import org.jetbrains.kotlin.idea.facet.KotlinFacet
 import org.jetbrains.kotlin.idea.macros.KotlinBundledUsageDetector
 import org.jetbrains.kotlin.idea.macros.KotlinBundledUsageDetectorListener
 import org.jetbrains.kotlin.idea.notification.catchNotificationText
@@ -146,6 +147,20 @@ class ConfigureKotlinInTempDirTest : AbstractConfigureKotlinInTempDirTest() {
         assertEmpty(getCanBeConfiguredModules(myProject, jvmConfigurator))
     }
 
+    fun testModuleFacetChange() {
+        val kotlinFacet = KotlinFacet.get(module)!!
+        val languageVersionSettings = module.languageVersionSettings
+        assertEquals(languageVersionSettings, module.languageVersionSettings)
+
+        runWriteAction {
+            val model = FacetManager.getInstance(module).createModifiableModel()
+            model.removeFacet(kotlinFacet)
+            model.commit()
+        }
+
+        assertFalse(languageVersionSettings == module.languageVersionSettings)
+    }
+
     fun testSimple() {
         assertNotConfigured(module, jvmConfigurator)
         jvmConfigurator.configure(myProject, emptyList())

plugins/kotlin/idea/tests/testData/configuration/moduleFacetChange/.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

plugins/kotlin/idea/tests/testData/configuration/moduleFacetChange/.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+    <component name="ProjectModuleManager">
+        <modules>
+            <module fileurl="file://$PROJECT_DIR$/module.iml" filepath="$PROJECT_DIR$/module.iml" />
+        </modules>
+    </component>
+</project>

plugins/kotlin/idea/tests/testData/configuration/moduleFacetChange/module.iml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+  <component name="FacetManager">
+    <facet type="kotlin-language" name="Kotlin">
+      <configuration version="5" platform="JVM 17" allPlatforms="JVM [17]" useProjectSettings="false">
+        <compilerSettings>
+          <option name="additionalArguments" value="-Xjvm-default=all" />
+        </compilerSettings>
+        <compilerArguments>
+          <stringArguments>
+            <stringArg name="jvmTarget" arg="17" />
+            <stringArg name="apiVersion" arg="1.7" />
+            <stringArg name="languageVersion" arg="1.7" />
+          </stringArguments>
+        </compilerArguments>
+      </configuration>
+    </facet>
+  </component>
+</module>