Merge pull request #129 from huynhducduy/main

Feat: notify users whenever an update available

cli/index.js

@@ -13,3 +13,25 @@ program.description('Start Jest Preview server.').action(() => {
 });
 
 program.parse(process.argv);
+
+// Checks for available update and notify user
+const updateNotifier = require('update-notifier');
+const chalk = require('chalk');
+
+const notifier = updateNotifier({
+  pkg: require('../package.json'),
+  updateCheckInterval: 0, // How often to check for updates
+  shouldNotifyInNpmScript: true, // Allows notification to be shown when running as an npm script
+  distTag: 'latest', // Can be use to notify user about pre-relase version
+});
+
+notifier.notify({
+  defer: true, // Try not to annoy user by showing the notification after the process has exited
+  message: [
+    `${chalk.blue('{packageName}')} has an update available: ${chalk.gray(
+      '{currentVersion}',
+    )} → ${chalk.green('{latestVersion}')}`,
+    `Please run ${chalk.cyan('`{updateCommand}`')} to update.`,
+  ].join('\n'),
+});
+// END checks for available update and notify user