parcel-bundler/src/cli.js

require('v8-compile-cache');
const chalk = require('chalk');
const program = require('commander');
const version = require('../package.json').version;

program.version(version);

program
  .command('serve [input...]')
  .description('starts a development server')
  .option(
    '-p, --port <port>',
    'set the port to serve on. defaults to 1234',
    parseInt
  )
  .option(
    '--host <host>',
    'set the host to listen on, defaults to listening on all interfaces'
  )
  .option(
    '--hmr-port <port>',
    'set the port to serve HMR websockets, defaults to random',
    parseInt
  )
  .option(
    '--hmr-hostname <hostname>',
    'set the hostname of HMR websockets, defaults to location.hostname of current window'
  )
  .option('--https', 'serves files over HTTPS')
  .option('--cert <path>', 'path to certificate to use with HTTPS')
  .option('--key <path>', 'path to private key to use with HTTPS')
  .option(
    '--open [browser]',
    'automatically open in specified browser, defaults to default browser'
  )
  .option(
    '-d, --out-dir <path>',
    'set the output directory. defaults to "dist"'
  )
  .option(
    '-o, --out-file <filename>',
    'set the output filename for the application entry point.'
  )
  .option(
    '--public-url <url>',
    'set the public URL to serve on. defaults to "/"'
  )
  .option('--global <variable>', 'expose your module through a global variable')
  .option('--no-hmr', 'disable hot module replacement')
  .option('--no-cache', 'disable the filesystem cache')
  .option('--no-source-maps', 'disable sourcemaps')
  .option('--no-autoinstall', 'disable autoinstall')
  .option(
    '-t, --target [target]',
    'set the runtime environment, either "node", "browser" or "electron". defaults to "browser"',
    /^(node|browser|electron)$/
  )
  .option(
    '--bundle-node-modules',
    'force bundling node modules, even on node/electron target'
  )
  .option('-V, --version', 'output the version number')
  .option(
    '--log-level <level>',
    'set the log level, either "0" (no output), "1" (errors), "2" (warnings), "3" (info), "4" (verbose) or "5" (debug, creates a log file).',
    /^([0-5])$/
  )
  .option('--cache-dir <path>', 'set the cache directory. defaults to ".cache"')
  .action(bundle);

program
  .command('watch [input...]')
  .description('starts the bundler in watch mode')
  .option(
    '-d, --out-dir <path>',
    'set the output directory. defaults to "dist"'
  )
  .option(
    '-o, --out-file <filename>',
    'set the output filename for the application entry point.'
  )
  .option(
    '--public-url <url>',
    'set the public URL to serve on. defaults to "/"'
  )
  .option('--global <variable>', 'expose your module through a global variable')
  .option(
    '--hmr-port <port>',
    'set the port to serve HMR websockets, defaults to random',
    parseInt
  )
  .option(
    '--hmr-hostname <hostname>',
    'set the hostname of HMR websockets, defaults to location.hostname of current window'
  )
  .option('--https', 'listen on HTTPS for HMR connections')
  .option('--cert <path>', 'path to certificate to use with HTTPS')
  .option('--key <path>', 'path to private key to use with HTTPS')
  .option('--no-hmr', 'disable hot module replacement')
  .option('--no-cache', 'disable the filesystem cache')
  .option('--no-source-maps', 'disable sourcemaps')
  .option('--no-autoinstall', 'disable autoinstall')
  .option(
    '-t, --target [target]',
    'set the runtime environment, either "node", "browser" or "electron". defaults to "browser"',
    /^(node|browser|electron)$/
  )
  .option(
    '--bundle-node-modules',
    'force bundling node modules, even on node/electron target'
  )
  .option(
    '--log-level <level>',
    'set the log level, either "0" (no output), "1" (errors), "2" (warnings), "3" (info), "4" (verbose) or "5" (debug, creates a log file).',
    /^([0-5])$/
  )
  .option('--cache-dir <path>', 'set the cache directory. defaults to ".cache"')
  .action(bundle);

program
  .command('build [input...]')
  .description('bundles for production')
  .option(
    '-d, --out-dir <path>',
    'set the output directory. defaults to "dist"'
  )
  .option(
    '-o, --out-file <filename>',
    'set the output filename for the application entry point.'
  )
  .option(
    '--public-url <url>',
    'set the public URL to serve on. defaults to "/"'
  )
  .option('--global <variable>', 'expose your module through a global variable')
  .option('--no-minify', 'disable minification')
  .option('--no-cache', 'disable the filesystem cache')
  .option('--no-source-maps', 'disable sourcemaps')
  .option('--no-autoinstall', 'disable autoinstall')
  .option('--no-content-hash', 'disable content hashing')
  .option(
    '--experimental-scope-hoisting',
    'enable experimental scope hoisting/tree shaking support'
  )
  .option(
    '-t, --target <target>',
    'set the runtime environment, either "node", "browser" or "electron". defaults to "browser"',
    /^(node|browser|electron)$/
  )
  .option(
    '--bundle-node-modules',
    'force bundling node modules, even on node/electron target'
  )
  .option(
    '--detailed-report [depth]',
    'print a detailed build report after a completed build. If enabled, defaults to depth "10"',
    /^([0-9]+|all)$/
  )
  .option(
    '--log-level <level>',
    'set the log level, either "0" (no output), "1" (errors), "2" (warnings), "3" (info), "4" (verbose) or "5" (debug, creates a log file).',
    /^([0-5])$/
  )
  .option('--cache-dir <path>', 'set the cache directory. defaults to ".cache"')
  .action(bundle);

program
  .command('help [command]')
  .description('display help information for a command')
  .action(function(command) {
    let cmd = program.commands.find(c => c.name() === command) || program;
    cmd.help();
  });

program.on('--help', function() {
  console.log('');
  console.log(
    '  Run `' +
      chalk.bold('parcel help <command>') +
      '` for more information on specific commands'
  );
  console.log('');
});

// Make serve the default command except for --help
var args = process.argv;
if (args[2] === '--help' || args[2] === '-h') args[2] = 'help';
if (!args[2] || !program.commands.some(c => c.name() === args[2])) {
  args.splice(2, 0, 'serve');
}

program.parse(args);

async function bundle(main, command) {
  // Require bundler here so the help command is fast
  const Bundler = require('../');

  if (command.name() === 'watch') {
    command.watch = true;
  }

  if (command.name() === 'build') {
    command.production = true;
    process.env.NODE_ENV = process.env.NODE_ENV || 'production';
  } else {
    process.env.NODE_ENV = process.env.NODE_ENV || 'development';
  }

  if (command.cert && command.key) {
    command.https = {
      cert: command.cert,
      key: command.key
    };
  }

  command.throwErrors = false;
  command.scopeHoist = command.experimentalScopeHoisting || false;

  const bundler = new Bundler(main, command);

  command.target = command.target || 'browser';
  if (command.name() === 'serve' && command.target === 'browser') {
    const port = command.port || process.env.PORT || 1234;
    const server = await bundler.serve(port, command.https, command.host);
    if (server && command.open) {
      await require('./utils/openInBrowser')(
        `${command.https ? 'https' : 'http'}://${command.host || 'localhost'}:${
          server.address().port
        }`,
        command.open
      );
    }
  } else {
    bundler.bundle();
  }
}