watch-detector

import WatchDetector from 'watch-detector'; import sane from 'sane'; import path from 'path'; import { fileURLToPath } from 'url'; const __dirname = path.dirname(fileURLToPath(import.meta.url)); const projectRoot = path.resolve(__dirname, 'temp-project'); // Replace with your actual project root // Ensure a directory exists for sane to watch import fs from 'fs'; if (!fs.existsSync(projectRoot)) { fs.mkdirSync(projectRoot, { recursive: true }); } // Instantiate the detector. Optional 'ui' and 'fs' instances can be passed. // For simplicity, we'll use defaults here. const detector = new WatchDetector(); const saneOptions = { glob: ['**/*.js', '**/*.css'], // Only watch JS and CSS files ignored: ['node_modules/**'] // Ignore node_modules }; async function setupWatcher() { try { // findBestWatcherOption returns an object with `watcher` key (e.g., 'watchman' or 'node') const options = await detector.findBestWatcherOption(saneOptions); console.log(`Detected best watcher: ${options.watcher}`); const watcher = sane(projectRoot, options); watcher.on('change', function (filepath, root, stat) { console.log('file changed', filepath, root, stat ? stat.mtime : ''); }); watcher.on('add', function (filepath, root, stat) { console.log('file added', filepath, root, stat ? stat.mtime : ''); }); watcher.on('delete', function (filepath, root) { console.log('file deleted', filepath, root); }); console.log(`Watching ${projectRoot} with ${options.watcher} watcher...`); // To demonstrate, create a file after a delay setTimeout(() => { const filePath = path.join(projectRoot, 'test-file.js'); fs.writeFileSync(filePath, '// This is a test file\nconsole.log("Hello");'); console.log(`Created ${filePath}`); }, 2000); // Clean up after 5 seconds setTimeout(() => { watcher.close(); console.log('Watcher closed.'); // fs.rmSync(projectRoot, { recursive: true, force: true }); // Uncomment to clean up temp dir }, 5000); } catch (error) { console.error('Error setting up watcher:', error); } } setupWatcher();