[LL API] Provide customizable default language version settings

analysis/analysis-api-standalone/analysis-api-standalone-base/src/org/jetbrains/kotlin/analysis/api/standalone/base/project/structure/KtStaticModuleProvider.kt

@@ -8,11 +8,13 @@ package org.jetbrains.kotlin.analysis.api.standalone.base.project.structure
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiFileSystemItem
 import org.jetbrains.kotlin.analysis.project.structure.*
+import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.psi.psiUtil.contains
 import org.jetbrains.kotlin.serialization.deserialization.builtins.BuiltInSerializerProtocol
 import org.jetbrains.kotlin.utils.KotlinExceptionWithAttachments
 
 class KtStaticModuleProvider(
+    override val globalLanguageVersionSettings: LanguageVersionSettings,
     private val builtinsModule: KtBuiltinsModule,
     private val projectStructure: KtModuleProjectStructure,
 ) : KtStaticProjectStructureProvider() {

analysis/analysis-test-framework/tests/org/jetbrains/kotlin/analysis/test/framework/services/AnalysisApiEnvironmentManager.kt

@@ -64,9 +64,11 @@ class AnalysisApiEnvironmentManagerImpl(
             getProject()
         )
 
+        val globalLanguageVersionSettings = useSiteModule.languageVersionSettings
+
         StandaloneProjectFactory.registerServicesForProjectEnvironment(
             _projectEnvironment,
-            KtStaticModuleProvider(builtinsModule, ktModuleProjectStructure),
+            KtStaticModuleProvider(globalLanguageVersionSettings, builtinsModule, ktModuleProjectStructure),
             useSiteCompilerConfiguration.languageVersionSettings,
             useSiteCompilerConfiguration.get(JVMConfigurationKeys.JDK_HOME)?.toPath(),
         )

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/sessions/LLFirAbstractSessionFactory.kt

@@ -179,7 +179,7 @@ internal abstract class LLFirAbstractSessionFactory(protected val project: Proje
 
     fun createNotUnderContentRootResolvableSession(module: KtNotUnderContentRootModule): LLFirNotUnderContentRootResolvableModuleSession {
         val builtinsSession = LLFirBuiltinsSessionFactory.getInstance(project).getBuiltinsSession(JvmPlatforms.unspecifiedJvmPlatform)
-        val languageVersionSettings = LanguageVersionSettingsImpl.DEFAULT
+        val languageVersionSettings = ProjectStructureProvider.getInstance(project).globalLanguageVersionSettings
         val scopeProvider = FirKotlinScopeProvider(::wrapScopeWithJvmMapped)
         val components = LLFirModuleResolveComponents(module, globalResolveComponents, scopeProvider)
 
@@ -333,7 +333,7 @@ internal abstract class LLFirAbstractSessionFactory(protected val project: Proje
 
         val platform = module.platform
         val builtinsSession = LLFirBuiltinsSessionFactory.getInstance(project).getBuiltinsSession(platform)
-        val languageVersionSettings = LanguageVersionSettingsImpl.DEFAULT
+        val languageVersionSettings = ProjectStructureProvider.getInstance(project).libraryLanguageVersionSettings
 
         val scopeProvider = FirKotlinScopeProvider()
         val components = LLFirModuleResolveComponents(module, globalResolveComponents, scopeProvider)
@@ -427,7 +427,7 @@ internal abstract class LLFirAbstractSessionFactory(protected val project: Proje
             registerModuleData(moduleData)
             registerIdeComponents(project)
             register(FirLazyDeclarationResolver::class, FirDummyCompilerLazyDeclarationResolver)
-            registerCommonComponents(LanguageVersionSettingsImpl.DEFAULT/*TODO*/)
+            registerCommonComponents(ProjectStructureProvider.getInstance(project).libraryLanguageVersionSettings)
             registerCommonComponentsAfterExtensionsAreConfigured()
 
             val kotlinScopeProvider = FirKotlinScopeProvider(::wrapScopeWithJvmMapped)

analysis/project-structure/src/org/jetbrains/kotlin/analysis/project/structure/ProjectStructureProvider.kt

@@ -7,6 +7,8 @@ package org.jetbrains.kotlin.analysis.project.structure
 
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.config.LanguageVersionSettings
+import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
 
 public abstract class ProjectStructureProvider {
     /**
@@ -24,6 +26,19 @@ public abstract class ProjectStructureProvider {
      */
     public abstract fun getModule(element: PsiElement, contextualModule: KtModule?): KtModule
 
+    /**
+     * Project-global [LanguageVersionSettings]. For source modules lacking [LanguageVersionSettings]
+     * (such as [KtNotUnderContentRootModule]), the default settings apply.
+     */
+    public open val globalLanguageVersionSettings: LanguageVersionSettings
+        get() = LanguageVersionSettingsImpl.DEFAULT
+
+    /**
+     * Project-global [LanguageVersionSettings] for [KtLibraryModule]s and [KtLibrarySourceModule]s.
+     */
+    public open val libraryLanguageVersionSettings: LanguageVersionSettings
+        get() = globalLanguageVersionSettings
+
     public companion object {
         public fun getInstance(project: Project): ProjectStructureProvider {
             return project.getService(ProjectStructureProvider::class.java)