[K/JS] Introduce the ability to consume platform-specific cli arguments inside the main function ^KT-16981 Fixed

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsIrBackendContext.kt

@@ -105,6 +105,7 @@ class JsIrBackendContext(
     val devMode = configuration[JSConfigurationKeys.DEVELOPER_MODE] ?: false
     val errorPolicy = configuration[JSConfigurationKeys.ERROR_TOLERANCE_POLICY] ?: ErrorTolerancePolicy.DEFAULT
     override val es6mode = configuration[JSConfigurationKeys.USE_ES6_CLASSES] ?: false
+    val platformArgumentsProviderJsExpression = configuration[JSConfigurationKeys.DEFINE_PLATFORM_MAIN_FUNCTION_ARGUMENTS]
 
     val externalPackageFragment = mutableMapOf<IrFileSymbol, IrFile>()
 

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ic/HashCalculatorForIC.kt

@@ -179,7 +179,13 @@ internal class ICHasher {
             hashCalculator.update(value.ordinal)
         }
 
-        hashCalculator.updateConfigKeys(config, listOf(JSConfigurationKeys.SOURCE_MAP_PREFIX)) { value: String ->
+        hashCalculator.updateConfigKeys(
+            config,
+            listOf(
+                JSConfigurationKeys.SOURCE_MAP_PREFIX,
+                JSConfigurationKeys.DEFINE_PLATFORM_MAIN_FUNCTION_ARGUMENTS
+            )
+        ) { value: String ->
             hashCalculator.update(value)
         }
 

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/lower/MainFunctionCallWrapperLowering.kt

@@ -72,7 +72,11 @@ class MainFunctionCallWrapperLowering(private val context: JsIrBackendContext) :
 
         return listOfNotNull(
             runIf(generateArgv) {
-                JsIrBuilder.buildArray(
+                context.platformArgumentsProviderJsExpression?.let {
+                    JsIrBuilder.buildCall(context.intrinsics.jsCode).apply {
+                        putValueArgument(0, it.toIrConst(context.irBuiltIns.stringType))
+                    }
+                } ?: JsIrBuilder.buildArray(
                     mainFunctionArgs.map { it.toIrConst(context.irBuiltIns.stringType) },
                     valueParameters.first().type,
                     context.irBuiltIns.stringType