fes.js/packages/fes/src/cli.js

import { chalk, yParser, semver } from '@umijs/utils';
import { Service } from './serviceWithBuiltIn';
import fork from './utils/fork';
import getCwd from './utils/getCwd';
import getPkg from './utils/getPkg';
import fesPkg from '../package.json';

const requiredVersion = fesPkg.engines.node;

function checkNodeVersion(wanted, id) {
    if (
        !semver.satisfies(process.version, wanted, { includePrerelease: true })
    ) {
        console.log(
            chalk.red(
                `You are using Node ${process.version}, but this version of ${id} requires Node ${wanted}.\nPlease upgrade your Node version.`
            )
        );
        process.exit(1);
    }
}

checkNodeVersion(requiredVersion, '@fesjs/fes');

// process.argv: [node, fes.js, command, args]
const rawArgv = process.argv.slice(2);
const args = yParser(rawArgv);

(async () => {
    try {
        const command = args._[0];
        if (command === 'dev') {
            const child = fork({
                scriptPath: require.resolve('./forkedDev')
            });
            // ref:
            // http://nodejs.cn/api/process/signal_events.html
            process.on('SIGINT', () => {
                child.kill('SIGINT');
                process.exit(1);
            });
            process.on('SIGTERM', () => {
                child.kill('SIGTERM');
                process.exit(1);
            });
        } else {
            if (command === 'build') {
                process.env.NODE_ENV = 'production';
            }
            await new Service({
                cwd: getCwd(),
                pkg: getPkg(process.cwd()),
                fesPkg
            }).run({
                args,
                rawArgv
            });
        }
    } catch (e) {
        console.error(chalk.red(e.message));
        console.error(e.stack);
        process.exit(1);
    }
})();