[JS IR] Add CLI argument to setup error tolerance policy

-  Make sure dev mode is enabled if code with errors is allowed

js/js.frontend/src/org/jetbrains/kotlin/js/analyze/TopDownAnalyzerFacadeForJS.kt

@@ -22,6 +22,7 @@ import org.jetbrains.kotlin.incremental.components.ExpectActualTracker
 import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.incremental.js.IncrementalDataProvider
 import org.jetbrains.kotlin.js.analyzer.JsAnalysisResult
+import org.jetbrains.kotlin.js.config.ErrorTolerancePolicy
 import org.jetbrains.kotlin.js.config.JSConfigurationKeys
 import org.jetbrains.kotlin.js.config.JsConfig
 import org.jetbrains.kotlin.js.resolve.JsPlatformAnalyzerServices
@@ -114,10 +115,14 @@ abstract class AbstractTopDownAnalyzerFacadeForJS {
         return JsAnalysisResult.success(trace, moduleContext.module)
     }
 
-    fun checkForErrors(allFiles: Collection<KtFile>, bindingContext: BindingContext) {
-        AnalyzingUtils.throwExceptionOnErrors(bindingContext)
-        for (file in allFiles) {
-            AnalyzingUtils.checkForSyntacticErrors(file)
+    fun checkForErrors(allFiles: Collection<KtFile>, bindingContext: BindingContext, errorPolicy: ErrorTolerancePolicy) {
+        if (!errorPolicy.allowSemanticErrors) {
+            AnalyzingUtils.throwExceptionOnErrors(bindingContext)
+        }
+        if (!errorPolicy.allowSyntaxErrors) {
+            for (file in allFiles) {
+                AnalyzingUtils.checkForSyntacticErrors(file)
+            }
         }
     }
 }

js/js.frontend/src/org/jetbrains/kotlin/js/config/ErrorTolerancePolicy.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.js.config
+
+enum class ErrorTolerancePolicy(val allowSyntaxErrors: Boolean, val allowSemanticErrors: Boolean) {
+    NONE(false, false),
+    SEMANTIC(false, true),
+    ALL(true, true);
+
+    val allowErrors: Boolean get() = allowSyntaxErrors || allowSemanticErrors
+
+    companion object {
+        val DEFAULT = NONE
+
+        fun resolvePolicy(key: String): ErrorTolerancePolicy {
+            return when (key.toUpperCase()) {
+                "NONE" -> NONE
+                "SEMANTIC" -> SEMANTIC
+                "SYNTAX", "ALL" -> ALL
+                else -> error("Unknown error tolerance policy '$key'")
+            }
+        }
+    }
+}

js/js.frontend/src/org/jetbrains/kotlin/js/config/JSConfigurationKeys.java

@@ -86,4 +86,7 @@ public class JSConfigurationKeys {
 
     public static final CompilerConfigurationKey<Boolean> DISABLE_FAKE_OVERRIDE_VALIDATOR =
             CompilerConfigurationKey.create("disable IR fake override validator");
+
+    public static final CompilerConfigurationKey<ErrorTolerancePolicy> ERROR_TOLERANCE_POLICY =
+            CompilerConfigurationKey.create("set up policy to ignore compilation errors");
 }

js/js.tests/test/org/jetbrains/kotlin/benchmarks/GenerateIrRuntime.kt

@@ -42,6 +42,7 @@ import org.jetbrains.kotlin.ir.descriptors.IrBuiltIns
 import org.jetbrains.kotlin.ir.descriptors.IrFunctionFactory
 import org.jetbrains.kotlin.ir.util.*
 import org.jetbrains.kotlin.js.analyze.TopDownAnalyzerFacadeForJS
+import org.jetbrains.kotlin.js.config.ErrorTolerancePolicy
 import org.jetbrains.kotlin.js.config.JSConfigurationKeys
 import org.jetbrains.kotlin.library.KotlinAbiVersion
 import org.jetbrains.kotlin.library.KotlinLibrary
@@ -441,7 +442,7 @@ class GenerateIrRuntime {
             )
 
         ProgressIndicatorAndCompilationCanceledStatus.checkCanceled()
-        TopDownAnalyzerFacadeForJS.checkForErrors(files, analysisResult.bindingContext)
+        TopDownAnalyzerFacadeForJS.checkForErrors(files, analysisResult.bindingContext, ErrorTolerancePolicy.NONE)
 
         return analysisResult
     }

js/js.translator/src/org/jetbrains/kotlin/js/facade/K2JSTranslator.kt

@@ -46,6 +46,7 @@ import org.jetbrains.kotlin.js.backend.ast.JsBlock
 import org.jetbrains.kotlin.js.backend.ast.JsName
 import org.jetbrains.kotlin.js.backend.ast.JsProgramFragment
 import org.jetbrains.kotlin.js.backend.ast.JsStatement
+import org.jetbrains.kotlin.js.config.ErrorTolerancePolicy
 import org.jetbrains.kotlin.js.coroutine.transformCoroutines
 import org.jetbrains.kotlin.js.inline.util.collectDefinedNamesInAllScopes
 import org.jetbrains.kotlin.js.translate.general.SourceFileTranslationResult
@@ -114,7 +115,7 @@ class K2JSTranslator @JvmOverloads constructor(
         packageMetadata: MutableMap<FqName, ByteArray>
     ): TranslationResult {
         val bindingTrace = analysisResult.bindingTrace
-        TopDownAnalyzerFacadeForJS.checkForErrors(files, bindingTrace.bindingContext)
+        TopDownAnalyzerFacadeForJS.checkForErrors(files, bindingTrace.bindingContext, ErrorTolerancePolicy.NONE)
         val moduleDescriptor = analysisResult.moduleDescriptor
         val diagnostics = bindingTrace.bindingContext.diagnostics
         val pathResolver = SourceFilePathResolver.create(config)
@@ -154,7 +155,7 @@ class K2JSTranslator @JvmOverloads constructor(
         packageMetadata: MutableMap<FqName, ByteArray>
     ): TranslationResult {
         val bindingTrace = analysisResult.bindingTrace
-        TopDownAnalyzerFacadeForJS.checkForErrors(files, bindingTrace.bindingContext)
+        TopDownAnalyzerFacadeForJS.checkForErrors(files, bindingTrace.bindingContext, ErrorTolerancePolicy.NONE)
         val moduleDescriptor = analysisResult.moduleDescriptor
         val diagnostics = bindingTrace.bindingContext.diagnostics
         val pathResolver = SourceFilePathResolver.create(config)