Add an option to enable USE_CODEGEN_DISCOVERY

Summary: Changelog: [Internal] Adding an option in RN Tester to enable the new codegen discovery option where it uses generate-artifacts.js to codegen native files. It also updates generate-artifacts.js to support the case where react-native is not within node_modules. It also updates the option name for rn-demo-app.

Reviewed By: cortinico

Differential Revision: D32777912

fbshipit-source-id: f2b76fa61573e3d4507a9f16f8243ac7ca006900

Author: sota000

packages/rn-tester/Podfile

@@ -18,13 +18,26 @@ if ENV['USE_HERMES'] == '1'
   puts "Using Hermes engine"
 end
 
-def pods()
+def pods(options = {})
   project 'RNTesterPods.xcodeproj'
 
   fabric_enabled = true
   puts "Building RNTester with Fabric #{fabric_enabled ? "enabled" : "disabled"}."
 
   prefix_path = "../.."
+
+  if options[:use_codegen_discovery]
+    Pod::UI.puts "[Codegen] Building target with codegen library discovery enabled."
+    pre_install do |installer|
+      use_react_native_codegen_discovery!({
+        react_native_path: prefix_path,
+        app_path: "#{Dir.pwd}",
+        fabric_enabled: fabric_enabled,
+        config_file_dir: "#{Dir.pwd}/node_modules",
+      })
+    end
+  end
+
   use_react_native!(path: prefix_path, fabric_enabled: fabric_enabled, hermes_enabled: ENV['USE_HERMES'] == '1')
   pod 'ReactCommon/turbomodule/samples', :path => "#{prefix_path}/ReactCommon"
 
@@ -38,7 +51,7 @@ def pods()
 end
 
 target 'RNTester' do
-  pods()
+  pods({ :use_codegen_discovery => ENV['USE_CODEGEN_DISCOVERY'] == '1' })
   if !USE_FRAMEWORKS
     use_flipper!
   end

packages/rn-tester/Podfile.lock

@@ -881,7 +881,7 @@ SPEC CHECKSUMS:
   CocoaAsyncSocket: 065fd1e645c7abab64f7a6a2007a48038fdc6a99
   DoubleConversion: 831926d9b8bf8166fd87886c4abab286c2422662
   FBLazyVector: b81a2b70c72d8b0aefb652cea22c11e9ffd02949
-  FBReactNativeSpec: 37e065c0cfc5da966014bf62b50edb066d8206cd
+  FBReactNativeSpec: 755b7fee1b08aefd74fb2fa9f7312b253719d536
   Flipper: 30e8eeeed6abdc98edaf32af0cda2f198be4b733
   Flipper-Boost-iOSX: fd1e2b8cbef7e662a122412d7ac5f5bea715403c
   Flipper-DoubleConversion: 57ffbe81ef95306cc9e69c4aa3aeeeeb58a6a28c
@@ -923,13 +923,13 @@ SPEC CHECKSUMS:
   React-RCTTest: 12bbd7fc2e72bd9920dc7286c5b8ef96639582b6
   React-RCTText: e9146b2c0550a83d1335bfe2553760070a2d75c7
   React-RCTVibration: 50be9c390f2da76045ef0dfdefa18b9cf9f35cfa
-  React-rncore: c57d93f56e2d385bdbda34eae2d20d4d3c0c8b4a
+  React-rncore: d09af3a25cbff0b484776785676c28f3729e07f5
   React-runtimeexecutor: 4b0c6eb341c7d3ceb5e2385cb0fdb9bf701024f3
   ReactCommon: 7a2714d1128f965392b6f99a8b390e3aa38c9569
-  ScreenshotManager: 9f69049876d8aafafa13a1a635baa8f7e168eee4
+  ScreenshotManager: e8a3fc9b2e24b81127b36cb4ebe0eed65090c949
   Yoga: c0d06f5380d34e939f55420669a60fe08b79bd75
   YogaKit: f782866e155069a2cca2517aafea43200b01fd5a
 
-PODFILE CHECKSUM: eb8cf8c55af63e11cb1907f2ae6b457739f4f0af
+PODFILE CHECKSUM: 56348fb590e835e25615af889a5cad2d5b227480
 
 COCOAPODS: 1.11.2

scripts/generate-artifacts.js

@@ -65,6 +65,7 @@ const CODEGEN_FABRIC_ENABLED = argv.e;
 const CODEGEN_REPO_PATH = `${RN_ROOT}/packages/react-native-codegen`;
 const CODEGEN_NPM_PATH = `${RN_ROOT}/../react-native-codegen`;
 const CORE_LIBRARIES = new Set(['rncore', 'FBReactNativeSpec']);
+const REACT_NATIVE_DEPENDENCY_NAME = 'react-native';
 
 function isReactNativeCoreLibrary(libraryName) {
   return CORE_LIBRARIES.has(libraryName);
@@ -78,23 +79,54 @@ function main(appRootDir, outputPath) {
   }
 
   try {
-    // 1. Get app package.json
+    // Get app package.json
     const pkgJson = JSON.parse(
       fs.readFileSync(path.join(appRootDir, 'package.json')),
     );
 
-    // 2. Get dependencies for the app
+    // Get dependencies for the app
     const dependencies = {...pkgJson.dependencies, ...pkgJson.devDependencies};
 
-    // 3. Determine which of these are codegen-enabled libraries
+    const libraries = [];
+
+    // Handle react-native core libraries.
+    // This is required when react-native is outside of node_modules.
+    console.log('[Codegen] Processing react-native core libraries');
+    const reactNativePkgJson = path.join(RN_ROOT, CODEGEN_CONFIG_FILENAME);
+    if (!fs.existsSync(reactNativePkgJson)) {
+      throw '[Codegen] Error: Could not find config file for react-native.';
+    }
+    const reactNativeConfigFile = JSON.parse(
+      fs.readFileSync(reactNativePkgJson),
+    );
+    if (
+      reactNativeConfigFile[CODEGEN_CONFIG_KEY] == null ||
+      reactNativeConfigFile[CODEGEN_CONFIG_KEY].libraries == null
+    ) {
+      throw '[Codegen] Error: Could not find codegen config for react-native.';
+    }
+    console.log('[Codegen] Found react-native');
+    reactNativeConfigFile[CODEGEN_CONFIG_KEY].libraries.forEach(config => {
+      const libraryConfig = {
+        library: REACT_NATIVE_DEPENDENCY_NAME,
+        config,
+        libraryPath: RN_ROOT,
+      };
+      libraries.push(libraryConfig);
+    });
+
+    // Determine which of these are codegen-enabled libraries
     const confifDir = CODEGEN_CONFIG_FILE_DIR || path.join(RN_ROOT, '..');
     console.log(
       `\n\n[Codegen] >>>>> Searching for codegen-enabled libraries in ${confifDir}`,
     );
-    const libraries = [];
 
-    // Handle react-native and third-party libraries
+    // Handle third-party libraries
     Object.keys(dependencies).forEach(dependency => {
+      if (dependency === REACT_NATIVE_DEPENDENCY_NAME) {
+        // react-native should already be added.
+        return;
+      }
       const codegenConfigFileDir = path.join(confifDir, dependency);
       const configFilePath = path.join(
         codegenConfigFileDir,
@@ -119,6 +151,10 @@ function main(appRootDir, outputPath) {
       }
     });
 
+    console.log(
+      '\n\n[Codegen] >>>>> Searching for codegen-enabled libraries in the app',
+    );
+
     // Handle in-app libraries
     if (
       pkgJson[CODEGEN_CONFIG_KEY] != null &&