feat: added emulator detection (#1021)

packages/react-native-executorch/android/src/main/cpp/ETInstallerModule.cpp

@@ -2,6 +2,8 @@
 
 #include <rnexecutorch/RnExecutorchInstaller.h>
 
+#include "EmulatorDetection.h"
+
 #include <jni.h>
 #include <jsi/jsi.h>
 
@@ -64,8 +66,10 @@ void ETInstallerModule::injectJSIBindings() {
     return std::vector<std::byte>(dataBytePtr, dataBytePtr + size);
   };
 
+  auto _isEmulator = isEmulator();
+
   RnExecutorchInstaller::injectJSIBindings(jsiRuntime_, jsCallInvoker_,
-                                           fetchDataByUrl);
+                                           fetchDataByUrl, _isEmulator);
 }
 } // namespace rnexecutorch
 

packages/react-native-executorch/android/src/main/cpp/EmulatorDetection.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <string>
+#include <sys/system_properties.h>
+
+namespace rnexecutorch {
+
+inline bool isEmulator() {
+  auto readProp = [](const char *key) -> std::string {
+#if __ANDROID_API__ >= 26
+    const prop_info *pi = __system_property_find(key);
+    if (pi == nullptr) {
+      return "";
+    }
+    std::string result;
+    __system_property_read_callback(
+        pi,
+        [](void *cookie, const char * /*__name*/, const char *value,
+           uint32_t /*__serial*/) {
+          *static_cast<std::string *>(cookie) = value;
+        },
+        &result);
+    return result;
+#else
+    char value[PROP_VALUE_MAX] = {0};
+    __system_property_get(key, value);
+    return {value};
+#endif
+  };
+
+  std::string fp = readProp("ro.build.fingerprint");
+  std::string hw = readProp("ro.hardware");
+  return fp.find("generic") == 0 || hw == "goldfish" || hw == "ranchu";
+}
+
+} // namespace rnexecutorch

packages/react-native-executorch/common/rnexecutorch/RnExecutorchInstaller.cpp

@@ -10,9 +10,9 @@
 #include <rnexecutorch/models/object_detection/ObjectDetection.h>
 #include <rnexecutorch/models/ocr/OCR.h>
 #include <rnexecutorch/models/speech_to_text/SpeechToText.h>
-#include <rnexecutorch/models/text_to_speech/TextToSpeech.h>
 #include <rnexecutorch/models/style_transfer/StyleTransfer.h>
 #include <rnexecutorch/models/text_to_image/TextToImage.h>
+#include <rnexecutorch/models/text_to_speech/TextToSpeech.h>
 #include <rnexecutorch/models/vertical_ocr/VerticalOCR.h>
 #include <rnexecutorch/models/voice_activity_detection/VoiceActivityDetection.h>
 #include <rnexecutorch/threads/GlobalThreadPool.h>
@@ -33,9 +33,12 @@ FetchUrlFunc_t fetchUrlFunc;
 
 void RnExecutorchInstaller::injectJSIBindings(
     jsi::Runtime *jsiRuntime, std::shared_ptr<react::CallInvoker> jsCallInvoker,
-    FetchUrlFunc_t fetchDataFromUrl) {
+    FetchUrlFunc_t fetchDataFromUrl, bool isEmulator) {
   fetchUrlFunc = fetchDataFromUrl;
 
+  jsiRuntime->global().setProperty(*jsiRuntime, "__rne_isEmulator",
+                                   jsi::Value(isEmulator));
+
   jsiRuntime->global().setProperty(
       *jsiRuntime, "loadStyleTransfer",
       RnExecutorchInstaller::loadModel<models::style_transfer::StyleTransfer>(

packages/react-native-executorch/common/rnexecutorch/RnExecutorchInstaller.h

@@ -22,7 +22,7 @@ class RnExecutorchInstaller {
   static void
   injectJSIBindings(jsi::Runtime *jsiRuntime,
                     std::shared_ptr<react::CallInvoker> jsCallInvoker,
-                    FetchUrlFunc_t fetchDataFromUrl);
+                    FetchUrlFunc_t fetchDataFromUrl, bool isEmulator);
 
 private:
   template <typename ModelT>

packages/react-native-executorch/ios/RnExecutorch/ETInstaller.mm

@@ -4,6 +4,7 @@
 
 #import <React/RCTCallInvoker.h>
 #import <ReactCommon/RCTTurboModule.h>
+#import <TargetConditionals.h>
 #include <rnexecutorch/RnExecutorchInstaller.h>
 #include <stdexcept>
 
@@ -41,8 +42,9 @@ @implementation ETInstaller
       throw std::runtime_error("Error fetching data from a url");
     }
   };
+  bool isEmulator = TARGET_OS_SIMULATOR;
   rnexecutorch::RnExecutorchInstaller::injectJSIBindings(
-      jsiRuntime, jsCallInvoker, fetchUrl);
+      jsiRuntime, jsCallInvoker, fetchUrl, isEmulator);
 
   NSLog(@"Successfully installed JSI bindings for react-native-executorch!");
   return @true;

packages/react-native-executorch/src/index.ts

@@ -46,6 +46,8 @@ declare global {
     symbols: string,
     independentCharacters?: boolean
   ) => any;
+  // eslint-disable-next-line camelcase
+  var __rne_isEmulator: boolean;
 }
 // eslint-disable no-var
 if (
@@ -63,7 +65,8 @@ if (
   global.loadSpeechToText == null ||
   global.loadTextToSpeechKokoro == null ||
   global.loadOCR == null ||
-  global.loadVerticalOCR == null
+  global.loadVerticalOCR == null ||
+  global.__rne_isEmulator == null
 ) {
   if (!ETInstallerNativeModule) {
     throw new Error(

packages/react-native-executorch/src/utils/ResourceFetcherUtils.ts

@@ -171,6 +171,10 @@ export namespace ResourceFetcherUtils {
     }
   }
 
+  export function isEmulator(): boolean {
+    return global.__rne_isEmulator;
+  }
+
   export async function checkFileExists(fileUri: string) {
     const fileInfo = await getInfoAsync(fileUri);
     return fileInfo.exists;