cxxreact: executors: insert ID of segment reliably into the bundle path

Reviewed By: fromcelticpark

Differential Revision: D7623232

fbshipit-source-id: df833d18f0445d52e3098b58aac347a2e9aa0040

ReactCommon/cxxreact/JSExecutor.cpp

@@ -0,0 +1,22 @@
+// Copyright 2004-present Facebook. All Rights Reserved.
+
+#include "JSExecutor.h"
+
+#include "RAMBundleRegistry.h"
+
+#include <folly/Conv.h>
+
+namespace facebook {
+namespace react {
+
+std::string JSExecutor::getSyntheticBundlePath(
+    uint32_t bundleId,
+    const std::string& bundlePath) {
+  if (bundleId == RAMBundleRegistry::MAIN_BUNDLE_ID) {
+    return bundlePath;
+  }
+  return folly::to<std::string>("seg-", bundleId, ".js");
+}
+
+}
+}