chore(deps): install Jest dependencies via TypeScript and Node (#5928)

CONTRIBUTING.md

@@ -51,7 +51,7 @@ Please see our [Contributor Code of Conduct](https://github.com/ionic-team/stenc
    1. There's no need to install a specific version of npm or Node right now, it shall be done automatically for you in
       the next step
 5. Run `npm ci`
-6. Run `npm install.jest` to install dependencies for Stencil's testing submodule
+6. Run `npm run install.jest` to install dependencies for Stencil's testing submodule
 
 
 ### Updates

package.json

@@ -100,7 +100,7 @@
     "clean.screenshots": "rm -rf test/end-to-end/screenshot/builds test/end-to-end/screenshot/images",
     "clean:scripts": "rm -rf scripts/build",
     "lint": "eslint 'bin/*' 'scripts/*.ts' 'scripts/**/*.ts' 'src/*.ts' 'src/**/*.ts' 'src/**/*.tsx' 'test/wdio/**/*.tsx'",
-    "install.jest": "bash ./src/testing/jest/install-dependencies.sh",
+    "install.jest": "npx tsx ./src/testing/jest/install-dependencies.mts",
     "prettier": "npm run prettier.base -- --write",
     "prettier.base": "prettier --cache \"./({bin,scripts,src,test}/**/*.{ts,tsx,js,jsx})|bin/stencil|.github/(**/)?*.(yml|yaml)|*.js\"",
     "prettier.dry-run": "npm run prettier.base -- --list-different",

src/testing/jest/install-dependencies.mts

@@ -0,0 +1,39 @@
+import { exec } from 'node:child_process';
+import fss from 'node:fs';
+import fs from 'node:fs/promises';
+import path from 'node:path'
+import url from 'node:url'
+
+const __dirname = url.fileURLToPath(new URL('.', import.meta.url));
+let found = false;
+
+const jestAdapters = (await fs.readdir(__dirname))
+  .filter((file) => file.startsWith('jest-'))
+  .filter((file) => fss.statSync(path.join(__dirname, file)).isDirectory());
+
+/**
+ * Loop through directories start with 'jest-', e.g. `jest-27-and-under`, `jest-28`, etc.
+ */
+for (const dir of jestAdapters) {
+  found = true;
+
+  const jestDir = path.join(__dirname, dir);
+  console.log(`→ Installing dependencies in ${jestDir}...`);
+  await new Promise<void>((resolve, reject) => {
+    exec('npm ci', { cwd: jestDir }, (err) => {
+      if (err) {
+        reject(err);
+      }
+      resolve();
+    });
+  });
+  console.log('Done 🎉');
+}
+
+/**
+ * If no directories were found and processed, print an error and exit
+ */
+if (!found) {
+  console.error('Error: No jest directories were found');
+  process.exit(1);
+}