Add script to init a MacOS test app

Author: kraenhansen

.gitignore

@@ -4,3 +4,6 @@ node_modules/
 dist/
 
 *.tsbuildinfo
+
+# Treading the MacOS app as ephemeral
+apps/macos-test-app

package.json

@@ -26,7 +26,8 @@
     "test": "npm test --workspace react-native-node-api --workspace cmake-rn --workspace gyp-to-cmake --workspace node-addon-examples",
     "bootstrap": "node --run build && npm run bootstrap --workspaces --if-present",
     "prerelease": "node --run build && npm run prerelease --workspaces --if-present",
-    "release": "changeset publish"
+    "release": "changeset publish",
+    "init-macos-test-app": "node scripts/init-macos-test-app.ts"
   },
   "author": {
     "name": "Callstack",
@@ -64,6 +65,7 @@
     "globals": "^16.0.0",
     "prettier": "^3.6.2",
     "react-native": "0.81.4",
+    "read-pkg": "^9.0.1",
     "tsx": "^4.20.5",
     "typescript": "^5.8.0",
     "typescript-eslint": "^8.38.0"

scripts/init-macos-test-app.ts

@@ -0,0 +1,110 @@
+import assert from "node:assert/strict";
+import cp from "node:child_process";
+import fs from "node:fs";
+import path from "node:path";
+
+const REACT_NATIVE_VERSION = "0.79.6";
+const ROOT_PATH = path.join(import.meta.dirname, "..");
+const APP_PATH = path.join(ROOT_PATH, "apps", "macos-test-app");
+const HOST_PACKAGE_PATH = path.join(ROOT_PATH, "packages", "host");
+
+function exec(command: string, args: string[], options: cp.SpawnOptions = {}) {
+  const { status } = cp.spawnSync(command, args, {
+    stdio: "inherit",
+    ...options,
+  });
+  assert.equal(status, 0, `Failed to execute '${command}'`);
+}
+
+async function deletePreviousApp() {
+  if (fs.existsSync(APP_PATH)) {
+    console.log("Deleting existing app directory");
+    await fs.promises.rm(APP_PATH, { recursive: true, force: true });
+  }
+}
+
+async function initializeReactNativeTemplate() {
+  console.log("Initializing community template");
+  exec("npx", [
+    "@react-native-community/cli",
+    "init",
+    "MacOSTestApp",
+    "--skip-install",
+    "--skip-git-init",
+    // "--platform-name",
+    // "react-native-macos",
+    "--version",
+    REACT_NATIVE_VERSION,
+    "--directory",
+    APP_PATH,
+  ]);
+
+  // Clean up
+  const CLEANUP_PATHS = ["ios", "android", "__tests__"];
+
+  for (const cleanupPath of CLEANUP_PATHS) {
+    await fs.promises.rm(path.join(APP_PATH, cleanupPath), {
+      recursive: true,
+      force: true,
+    });
+  }
+}
+
+function installDependencies() {
+  console.log("Installing dependencies");
+  exec(
+    "npm",
+    [
+      "install",
+      "--save-dev",
+      "--prefer-offline",
+      "--install-links",
+      "react-native-macos-init",
+      path.relative(APP_PATH, HOST_PACKAGE_PATH),
+    ],
+    {
+      cwd: APP_PATH,
+    },
+  );
+}
+
+function initializeReactNativeMacOSTemplate() {
+  console.log("Initializing react-native-macos template");
+  exec("npx", ["react-native-macos-init"], {
+    cwd: APP_PATH,
+  });
+}
+
+async function patchPodfile() {
+  console.log("Patching Podfile");
+  // Patch Podfile as per https://github.com/microsoft/react-native-macos/issues/2723#issuecomment-3392930688
+  const podfilePath = path.join(APP_PATH, "macos", "Podfile");
+  const podfileContents = await fs.promises.readFile(podfilePath, "utf8");
+  const unwantedLines = [
+    "require_relative '../node_modules/react-native-macos/scripts/react_native_pods'",
+    "require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'",
+    "require_relative '../node_modules/react-native-macos/scripts/cocoapods/autolinking'",
+  ];
+  const podfilePatched = [
+    "require_relative '../node_modules/react-native-macos/scripts/cocoapods/autolinking'",
+    ...podfileContents
+      .split("\n")
+      .filter((line) => !unwantedLines.includes(line)),
+  ];
+
+  await fs.promises.writeFile(podfilePath, podfilePatched.join("\n"), "utf8");
+}
+
+function installCocoapods() {
+  console.log("Installing cocoapods");
+  exec("pod", ["install", "--project-directory=macos"], {
+    cwd: APP_PATH,
+  });
+}
+
+await deletePreviousApp();
+await initializeReactNativeTemplate();
+installDependencies();
+initializeReactNativeMacOSTemplate();
+await patchPodfile();
+installCocoapods();

tsconfig.json

@@ -6,6 +6,7 @@
   },
   "files": ["prettier.config.js", "eslint.config.js"],
   "references": [
+    { "path": "./tsconfig.scripts.json" },
     { "path": "./packages/cli-utils/tsconfig.json" },
     { "path": "./packages/cmake-file-api/tsconfig.json" },
     { "path": "./packages/cmake-file-api/tsconfig.tests.json" },

tsconfig.scripts.json

@@ -0,0 +1,10 @@
+{
+  "extends": "./configs/tsconfig.node.json",
+  "compilerOptions": {
+    "composite": true,
+    "emitDeclarationOnly": true,
+    "declarationMap": false,
+    "rootDir": "scripts"
+  },
+  "include": ["scripts"]
+}