setup react native app for local development

.expo-shared/assets.json

@@ -0,0 +1,4 @@
+{
+  "12bb71342c6255bbf50437ec8f4441c083f47cdb74bd89160c15e4f43e52a1cb": true,
+  "40b842e832070c58deac6aa9e08fa459302ee3f9da492c7e77d93d2fbf4a56fd": true
+}

.gitignore

@@ -1,2 +1,15 @@
 lib/
-node_modules/
+node_modules/
+.expo/
+dist/
+npm-debug.*
+*.jks
+*.p8
+*.p12
+*.key
+*.mobileprovision
+*.orig.*
+web-build/
+
+# macOS
+.DS_Store

App.tsx

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+function App() {
+  return null;
+}
+
+export default App;

app.json

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+{
+  "expo": {
+    "entryPoint": "node_modules/expo/AppEntry.js"
+  }
+}

babel.config.js

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+module.exports = function (api) {
+  api.cache(true);
+
+  return {
+    presets: ['babel-preset-expo', 'module:metro-react-native-babel-preset'],
+    plugins: [
+      [
+        'module-resolver',
+        {
+          root: ['.'],
+          extensions: [
+            '.ios.ts',
+            '.android.ts',
+            '.ts',
+            '.ios.tsx',
+            '.android.tsx',
+            '.tsx',
+            '.jsx',
+            '.js',
+            '.json',
+          ],
+          alias: {
+            components: './src/components',
+          },
+        },
+      ],
+    ],
+  };
+};

global.d.ts

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+type Undefined<T> = T | undefined;
+
+type Nullable<T> = T | null;

index.js

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+import { registerRootComponent } from 'expo';
+
+import App from './App';
+
+// registerRootComponent calls AppRegistry.registerComponent('main', () => App);
+// It also ensures that whether you load the app in Expo Go or in a native build,
+// the environment is set up appropriately
+registerRootComponent(App);

inject-env-variables.ts

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+import Constants from 'expo-constants';
+
+const DEVELOPMENT_BASE_URL = `http://${Constants.manifest?.debuggerHost?.split(':').shift()}:3000`;
+
+const DEVELOPMENT = {
+  NEXT_PUBLIC_BACKEND_URL: `${DEVELOPMENT_BASE_URL}/api`,
+};
+
+const PRODUCTION = {
+  NEXT_PUBLIC_BACKEND_URL: 'https://climb-tracker.com/api',
+};
+
+if (process.env.NODE_ENV === 'development') {
+  process.env = {
+    ...process.env,
+    ...DEVELOPMENT,
+  };
+} else {
+  process.env = {
+    ...process.env,
+    ...PRODUCTION,
+  };
+}