jangular-cli/lib/update-notifier.js

A powerful CLI tool for rapidly bootstrapping Angular 17 & Spring Boot (Java 21) applications with integrated security, services, and enterprise-ready best practices.

import { execSync } from 'child_process';
import { get } from 'https';
import semver from 'semver';

export class UpdateNotifier {
    constructor(packageName, silent = false) {
        this.packageName = packageName;
        this.silent = silent;
        this.localVersion = this.getLocalVersion();
    }

    getLocalVersion() {
        try {
            const output = execSync(`npm list -g ${this.packageName} --depth=0`, { encoding: 'utf8' });
            const versionMatch = output.match(/\d+\.\d+\.\d+/);
            return versionMatch ? versionMatch[0] : null;
        } catch (error) {
            console.error(`[UpdateNotifier] Failed to get local version: ${error.message}`);
            return null;
        }
    }

    checkForUpdate() {
        return new Promise((resolve, reject) => {
            if (!this.localVersion) {
                resolve();
                return;
            }

            const options = {
                hostname: 'registry.npmjs.org',
                path: `/${this.packageName}/latest`,
                method: 'GET',
                headers: {
                    'User-Agent': 'Node.js Update Notifier'
                }
            };

            const req = get(options, (res) => {
                let data = '';

                res.on('data', (chunk) => {
                    data += chunk;
                });

                res.on('end', () => {
                    try {
                        const latestVersion = JSON.parse(data).version;
                        
                        // Use semver to compare versions more accurately
                        if (semver.gt(latestVersion, this.localVersion)) {
                            this.notifyUpdate(latestVersion);
                        }
                        
                        resolve();
                    } catch (error) {
                        console.error(`[UpdateNotifier] Error parsing response: ${error.message}`);
                        reject(error);
                    }
                });
            });

            req.on('error', (error) => {
                console.error(`[UpdateNotifier] Failed to fetch latest version: ${error.message}`);
                reject(error);
            });

            // Set a timeout to prevent hanging
            req.setTimeout(5000, () => {
                req.abort();
                resolve();
            });
        });
    }

    notifyUpdate(latestVersion) {
        if (this.silent) return;
        console.log(`\x1b[33mUpdate available: ${this.localVersion} → ${latestVersion}\x1b[0m`);
        console.log(`Run \x1b[32mnpm install -g ${this.packageName}\x1b[0m to update.`);
    }
}