Set jvm target for scratch files

#KT-38455 fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/project/ScriptModuleInfos.kt

@@ -56,7 +56,7 @@ data class ScriptModuleInfo(
     }
 
     override val platform: TargetPlatform
-        get() = TargetPlatformDetector.getPlatform(project, scriptDefinition)
+        get() = TargetPlatformDetector.getPlatform4Script(project, scriptFile, scriptDefinition)
 
     override val analyzerServices: PlatformDependentAnalyzerServices
         get() = JvmPlatformAnalyzerServices

idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/IDELanguageSettingsProvider.kt

@@ -16,10 +16,13 @@
 
 package org.jetbrains.kotlin.idea.compiler
 
+import com.intellij.openapi.module.Module
 import com.intellij.openapi.module.ModuleManager
 import com.intellij.openapi.project.Project
+import com.intellij.openapi.roots.ProjectFileIndex
 import com.intellij.openapi.roots.ProjectRootModificationTracker
 import com.intellij.openapi.util.Key
+import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.psi.util.CachedValue
 import com.intellij.psi.util.CachedValueProvider
 import com.intellij.psi.util.CachedValuesManager
@@ -33,12 +36,16 @@ import org.jetbrains.kotlin.config.JvmTarget
 import org.jetbrains.kotlin.config.KotlinFacetSettingsProvider
 import org.jetbrains.kotlin.config.LanguageVersionSettings
 import org.jetbrains.kotlin.idea.caches.project.*
+import org.jetbrains.kotlin.idea.core.script.scriptRelatedModuleName
+import org.jetbrains.kotlin.idea.project.TargetPlatformDetector
 import org.jetbrains.kotlin.idea.project.getLanguageVersionSettings
 import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.idea.project.platform
+import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.platform.TargetPlatformVersion
 import org.jetbrains.kotlin.platform.jvm.JdkPlatform
 import org.jetbrains.kotlin.platform.subplatformsOfType
+import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.scripting.definitions.ScriptDefinition
 import org.jetbrains.kotlin.utils.Jsr305State
 
@@ -53,8 +60,20 @@ object IDELanguageSettingsProvider : LanguageSettingsProvider {
             is LibraryInfo -> project.getLanguageVersionSettings(
                 jsr305State = computeJsr305State(project), isReleaseCoroutines = isReleaseCoroutines
             )
-            is ScriptModuleInfo -> getLanguageSettingsForScripts(project, moduleInfo.scriptDefinition).languageVersionSettings
-            is ScriptDependenciesInfo.ForFile -> getLanguageSettingsForScripts(project, moduleInfo.scriptDefinition).languageVersionSettings
+            is ScriptModuleInfo -> {
+                getLanguageSettingsForScripts(
+                    project,
+                    moduleInfo.scriptFile,
+                    moduleInfo.scriptDefinition
+                ).languageVersionSettings
+            }
+
+            is ScriptDependenciesInfo.ForFile ->
+                getLanguageSettingsForScripts(
+                    project,
+                    moduleInfo.scriptFile,
+                    moduleInfo.scriptDefinition
+                ).languageVersionSettings
             is PlatformModuleInfo -> moduleInfo.platformModule.module.languageVersionSettings
             else -> project.getLanguageVersionSettings()
         }
@@ -77,10 +96,11 @@ object IDELanguageSettingsProvider : LanguageSettingsProvider {
     // TODO(dsavvinov): get rid of this method; instead store proper instance of TargetPlatformVersion in platform-instance
     override fun getTargetPlatform(moduleInfo: ModuleInfo, project: Project): TargetPlatformVersion =
         when (moduleInfo) {
-            is ModuleSourceInfo -> moduleInfo.module.platform?.subplatformsOfType<JdkPlatform>()?.firstOrNull()?.targetVersion
-                ?: TargetPlatformVersion.NoVersion
-            is ScriptModuleInfo -> getLanguageSettingsForScripts(project, moduleInfo.scriptDefinition).targetPlatformVersion
-            is ScriptDependenciesInfo.ForFile -> getLanguageSettingsForScripts(project, moduleInfo.scriptDefinition).targetPlatformVersion
+            is ModuleSourceInfo ->
+                moduleInfo.module.platform?.subplatformsOfType<JdkPlatform>()?.firstOrNull()?.targetVersion
+                    ?: TargetPlatformVersion.NoVersion
+            is ScriptModuleInfo,
+            is ScriptDependenciesInfo.ForFile -> detectDefaultTargetPlatformVersion(moduleInfo.platform)
             else -> TargetPlatformVersion.NoVersion
         }
 }
@@ -92,21 +112,30 @@ private data class ScriptLanguageSettings(
 
 private val SCRIPT_LANGUAGE_SETTINGS = Key.create<CachedValue<ScriptLanguageSettings>>("SCRIPT_LANGUAGE_SETTINGS")
 
-fun getTargetPlatformVersionForScripts(project: Project, scriptDefinition: ScriptDefinition): TargetPlatformVersion {
-    return getLanguageSettingsForScripts(project, scriptDefinition).targetPlatformVersion
+fun getTargetPlatformVersionForScript(project: Project, file: VirtualFile, scriptDefinition: ScriptDefinition): TargetPlatformVersion {
+    return getLanguageSettingsForScripts(project, file, scriptDefinition).targetPlatformVersion
 }
 
-private fun getLanguageSettingsForScripts(project: Project, scriptDefinition: ScriptDefinition): ScriptLanguageSettings {
+private fun detectDefaultTargetPlatformVersion(platform: TargetPlatform?): TargetPlatformVersion {
+    return platform?.subplatformsOfType<JdkPlatform>()?.firstOrNull()?.targetVersion ?: TargetPlatformVersion.NoVersion
+}
+
+private fun getLanguageSettingsForScripts(project: Project, file: VirtualFile, scriptDefinition: ScriptDefinition): ScriptLanguageSettings {
+    val scriptModule = file.let {
+        it.scriptRelatedModuleName?.let { ModuleManager.getInstance(project).findModuleByName(it) }
+            ?: ProjectFileIndex.SERVICE.getInstance(project).getModuleForFile(it)
+    }
+
     val args = scriptDefinition.compilerOptions
     return if (args == null || args.none()) {
-        ScriptLanguageSettings(project.getLanguageVersionSettings(), TargetPlatformVersion.NoVersion)
+        ScriptLanguageSettings(project.getLanguageVersionSettings(), detectDefaultTargetPlatformVersion(scriptModule?.platform))
     } else {
         val settings = scriptDefinition.getUserData(SCRIPT_LANGUAGE_SETTINGS) ?: createCachedValue(project) {
             val compilerArguments = K2JVMCompilerArguments()
             parseCommandLineArguments(args.toList(), compilerArguments)
             // TODO: reporting
             val verSettings = compilerArguments.toLanguageVersionSettings(MessageCollector.NONE)
-            val jvmTarget = compilerArguments.jvmTarget?.let { JvmTarget.fromString(it) } ?: TargetPlatformVersion.NoVersion
+            val jvmTarget = compilerArguments.jvmTarget?.let { JvmTarget.fromString(it) } ?: detectDefaultTargetPlatformVersion(scriptModule?.platform)
             ScriptLanguageSettings(verSettings, jvmTarget)
         }.also { scriptDefinition.putUserData(SCRIPT_LANGUAGE_SETTINGS, it) }
         settings.value

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/TargetPlatformDetector.java

@@ -64,7 +64,7 @@ public class TargetPlatformDetector {
         final ScriptDefinition scriptDefinition =
                 ReadAction.compute(() -> file.isScript() ? DefinitionsKt.findScriptDefinition(file) : null);
         if (scriptDefinition != null) {
-            return getPlatform(file.getProject(), scriptDefinition);
+            return getPlatform4Script(file.getProject(), file.getOriginalFile().getVirtualFile(), scriptDefinition);
         }
 
         VirtualFile virtualFile = file.getOriginalFile().getVirtualFile();
@@ -84,10 +84,21 @@ public class TargetPlatformDetector {
     }
 
     @NotNull
-    public static TargetPlatform getPlatform(@NotNull Project project, @NotNull ScriptDefinition scriptDefinition) {
-        String platformNameFromScriptDefinition = scriptDefinition.getPlatform();
+    public static TargetPlatform getPlatform4Script(
+            @NotNull Project project,
+            @NotNull VirtualFile file,
+            @NotNull ScriptDefinition scriptDefinition
+    ) {
         TargetPlatformVersion targetPlatformVersion =
-                IDELanguageSettingsProviderKt.getTargetPlatformVersionForScripts(project, scriptDefinition);
+                IDELanguageSettingsProviderKt.getTargetPlatformVersionForScript(project, file, scriptDefinition);
+        return getPlatform4ScriptImpl(targetPlatformVersion, scriptDefinition);
+    }
+
+    @NotNull
+    private static TargetPlatform getPlatform4ScriptImpl(
+            TargetPlatformVersion targetPlatformVersion,
+            @NotNull ScriptDefinition scriptDefinition
+    ) {
         if (!targetPlatformVersion.equals(TargetPlatformVersion.NoVersion.INSTANCE)) {
             for (TargetPlatform compilerPlatform : CommonPlatforms.INSTANCE.getAllSimplePlatforms()) {
                 SimplePlatform simplePlatform = CollectionsKt.single(compilerPlatform);
@@ -97,6 +108,7 @@ public class TargetPlatformDetector {
             }
         }
 
+        String platformNameFromScriptDefinition = scriptDefinition.getPlatform();
         for (TargetPlatform compilerPlatform : CommonPlatforms.INSTANCE.getAllSimplePlatforms()) {
             // FIXME(dsavvinov): get rid of matching by name
             SimplePlatform simplePlatform = CollectionsKt.single(compilerPlatform);
@@ -107,5 +119,4 @@ public class TargetPlatformDetector {
 
         return DefaultIdeTargetPlatformKindProvider.Companion.getDefaultPlatform();
     }
-
 }