Make new arch example app compile on Android

example-new-architecture/android/app/build.gradle

@@ -153,6 +153,15 @@ dependencies {
     } else {
         implementation jscFlavor
     }
+
+    constraints {
+        implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.8.0") {
+            because("kotlin-stdlib-jdk7 is now a part of kotlin-stdlib")
+        }
+        implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.8.0") {
+            because("kotlin-stdlib-jdk8 is now a part of kotlin-stdlib")
+        }
+    }
 }
 
 apply from: file("../../node_modules/@react-native-community/cli-platform-android/native_modules.gradle"); applyNativeModulesAppBuildGradle(project)

example-new-architecture/metro.config.js

@@ -1,4 +1,36 @@
+const path = require('path');
+const exclusionList = require('metro-config/src/defaults/exclusionList');
+const escape = require('escape-string-regexp');
+const pakCore = require('../packages/core/package.json');
+
+const root = path.resolve(__dirname, '..');
+
+const modules = Object.keys({
+  ...pakCore.peerDependencies,
+});
+
 module.exports = {
+  projectRoot: __dirname,
+  watchFolders: [root],
+
+  // We need to make sure that only one version is loaded for peerDependencies
+  // So we blacklist them at the root, and alias them to the versions in example's node_modules
+  // This block is very important, because otherwise things like React can be packed multiple times
+  // while it should be only one React instance in the runtime. exclusionList relies on the modules which are
+  // declared as peer dependencies in the core package.
+  resolver: {
+    blacklistRE: exclusionList(
+      modules.map(
+        m => new RegExp(`^${escape(path.join(root, 'node_modules', m))}\\/.*$`),
+      ),
+    ),
+
+    extraNodeModules: modules.reduce((acc, name) => {
+      acc[name] = path.join(__dirname, 'node_modules', name);
+      return acc;
+    }, {}),
+  },
+
   transformer: {
     getTransformOptions: async () => ({
       transform: {