add example

.yarnrc.yml

@@ -41,5 +41,6 @@ packageExtensions:
 plugins:
   - path: .yarn/plugins/@yarnpkg/plugin-compat.cjs
     spec: "@yarnpkg/plugin-compat"
+  - path: incubator/yarn-plugin-align-deps/index.js
 tsEnableAutoTypes: false
 yarnPath: .yarn/releases/yarn-4.6.0.cjs

package.json

@@ -228,5 +228,8 @@
       }
     }
   },
-  "prettier": "./.github/prettierrc.json"
+  "prettier": "./.github/prettierrc.json",
+  "rnx-kit": {
+    "profiles": "./scripts/dependencies.config.js"
+  }
 }

packages/test-app/package.json

@@ -69,10 +69,10 @@
     "jest": "^29.2.1",
     "prettier": "^3.0.0",
     "react-native-test-app": "^4.0.0",
-    "react-test-renderer": "18.3.1",
-    "typescript": "^5.0.0"
+    "react-test-renderer": "18.3.1"
   },
   "rnx-kit": {
+    "profile": "test",
     "kitType": "app",
     "build": {
       "distribution": [

scripts/dependencies.config.js

@@ -0,0 +1,48 @@
+import * as fs from "node:fs";
+import * as path from "node:path";
+
+function needsESLint(cwd) {
+  return fs.existsSync(path.join(cwd, "eslint.config.js"));
+}
+
+function needsJest(cwd, manifest) {
+  return "jest" in manifest || fs.existsSync(path.join(cwd, "jest.config.js"));
+}
+
+function needsTypeScript(cwd) {
+  return fs.existsSync(path.join(cwd, "tsconfig.json"));
+}
+
+const COMMON_DEPENDENCIES = [
+  ["eslint", needsESLint],
+  ["jest", needsJest],
+  ["typescript", needsTypeScript],
+];
+
+const getDependencyVersion = (() => {
+  let deps;
+  return (name) => {
+    if (!deps) {
+      const url = new URL("package.json", import.meta.url);
+      const manifest = fs.readFileSync(url, { encoding: "utf-8" });
+      deps = JSON.parse(manifest)["dependencies"];
+    }
+
+    return deps[name];
+  };
+})();
+
+export default function (cwd, manifest) {
+  let extensions = undefined;
+
+  for (const [pkg, test] of COMMON_DEPENDENCIES) {
+    if (test(cwd, manifest)) {
+      extensions ||= { dependencies: {} };
+      extensions.dependencies[pkg] = getDependencyVersion(pkg);
+    }
+  }
+
+  console.log({ cwd, extensions });
+
+  return extensions;
+}

yarn.lock

@@ -4592,7 +4592,6 @@ __metadata:
     react-native-test-app: "npm:^4.0.0"
     react-native-windows: "npm:^0.76.0"
     react-test-renderer: "npm:18.3.1"
-    typescript: "npm:^5.0.0"
   bin:
     rnx: ../cli/bin/rnx-cli.cjs
     rnx.reason: Workaround for Node not being able to find `rnx-cli` because of Yarn virtual packages