cli.js

import arg from 'arg'
import chalk from 'chalk'
import spawn from 'cross-spawn'

import packageJson from './package.json'

const commands = ['connect', 'init']

const args = arg(
    {
        // Types
        '--version': Boolean,
        '--help': Boolean,

        // Aliases
        '-v': '--version',
        '-h': '--help',
    },
    {
        permissive: true,
    }
)

if (args['--version']) {
    console.log(packageJson.version)
    process.exit(0)
}

if (args['--help'] || !args._.length) {
    console.log(`
    Usage:
      $ mould <command> [workdir]

    Available commands:
      ${commands.join(', ')}

    Options:
      --version, -v   output the version number
      --help, -h      output usage information
    `)
    process.exit(0)
}

const [command, workdir = '.'] = args._

if (commands.includes(command)) {
    const result = spawn.sync(
        'node',
        ['-r', 'esm', require.resolve(`./commands/${command}`)],
        { env: { ...process.env, WORKDIR: workdir }, stdio: 'inherit' }
    )

    if (result.signal) {
        if (result.signal === 'SIGKILL') {
            console.log(
                'The script failed because ' +
                    'the process received a request for its immediate termination.'
            )
        } else if (result.signal === 'SIGTERM') {
            console.log(
                'The script failed because ' +
                    'the process received a request for its termination.'
            )
        }
        process.exit(1)
    }
    process.exit(result.status)
} else {
    console.error(
        `Unknown command:\n\n` +
            `  ${chalk.cyan('mould')} ${chalk.red(command)}\n`
    )
    process.exit(1)
}