Add conditional on iOS

Author: m-bert

packages/react-native-gesture-handler/RNGestureHandler.podspec

@@ -1,10 +1,11 @@
 require "json"
-
+require_relative '../../scripts/gesture_handler_utils'
 
 is_gh_example_app = ENV["GH_EXAMPLE_APP_NAME"] != nil
 
 compilation_metadata_dir = "CompilationDatabase"
 compilation_metadata_generation_flag = is_gh_example_app ? '-gen-cdb-fragment-path ' + compilation_metadata_dir : ''
+version_flag = "-DREACT_NATIVE_MINOR_VERSION=#{get_react_native_minor_version()}"
 
 Pod::Spec.new do |s|
   # NPM package specification
@@ -21,7 +22,7 @@ Pod::Spec.new do |s|
   s.requires_arc = true
   s.platforms       = { ios: '11.0', tvos: '11.0', osx: '10.15', visionos: '1.0' }
   s.xcconfig = {
-    "OTHER_CFLAGS" => "$(inherited) " + compilation_metadata_generation_flag
+    "OTHER_CFLAGS" => "$(inherited) #{compilation_metadata_generation_flag} #{version_flag}"
   }
 
   if defined?(install_modules_dependencies()) != nil

packages/react-native-gesture-handler/apple/RNGestureHandlerModule.mm

@@ -101,7 +101,12 @@ void decorateRuntime(jsi::Runtime &runtime)
         if (!arguments[0].isObject()) {
           return jsi::Value::null();
         }
+
+#if REACT_NATIVE_MINOR_VERSION >= 81
         auto shadowNode = Bridging<std::shared_ptr<const ShadowNode>>::fromJs(runtime, arguments[0]);
+#else
+        auto shadowNode = shadowNodeFromValue(runtime, arguments[0]);
+#endif
 
         if (dynamic_pointer_cast<const ParagraphShadowNode>(shadowNode)) {
           return jsi::Value(true);

scripts/gesture_handler_utils.rb

@@ -0,0 +1,23 @@
+def try_to_parse_react_native_package_json(node_modules_dir)
+    react_native_package_json_path = File.join(node_modules_dir, 'react-native/package.json')
+    if !File.exist?(react_native_package_json_path)
+      return nil
+    end
+    return JSON.parse(File.read(react_native_package_json_path))
+  end
+
+def get_react_native_minor_version()
+    react_native_node_modules_dir = File.join(File.dirname(`cd "#{Pod::Config.instance.installation_root.to_s}" && node --print "require.resolve('react-native/package.json')"`), '..')
+    react_native_json = try_to_parse_react_native_package_json(react_native_node_modules_dir)
+
+    if react_native_json == nil
+        node_modules_dir = ENV["REACT_NATIVE_NODE_MODULES_DIR"]
+        react_native_json = try_to_parse_react_native_package_json(node_modules_dir)
+      end
+
+    if react_native_json == nil
+        raise '[react-native-gesture-handler] Unable to recognize your `react-native` version. Please set environmental variable with `react-native` location: `export REACT_NATIVE_NODE_MODULES_DIR="<path to react-native>" && pod install`.'
+      end
+
+    return react_native_json['version'].split('.')[1].to_i
+end