yargs_cli_serve_command_with_port_and_verbose_options.ts

1import yargs from 'yargs';
2import { hideBin } from 'yargs/helpers';
3
4yargs(hideBin(process.argv))
5  .command('serve [port]', 'start the server', (yargs) => {
6    return yargs
7      .positional('port', {
8        describe: 'port to bind on',
9        default: 5000
10      })
11  }, (argv) => {
12    if (argv.verbose) console.info(`start server on :${argv.port}`)
13    serve(argv.port)
14  })
15  .option('verbose', {
16    alias: 'v',
17    type: 'boolean',
18    description: 'Run with verbose logging'
19  })
20  .parse()
21
22function serve(port: number | unknown) {
23  console.log(`Server is running on port ${port}`);
24}