Function dev

packages/cli/src/commands/dev/dev.ts:40–307

(
  client: Client,
  opts: Partial<Options>,
  args: string[],
  telemetry: DevTelemetryClient
)

};

export default async function dev(
  client: Client,
  opts: Partial<Options>,
  args: string[],
  telemetry: DevTelemetryClient
) {
  const [dir = '.'] = args;
  let cwd = resolve(dir);
  const listen = parseListen(opts['--listen'] || '3000');

  cwd = await resolveProjectCwd(cwd);

  const projectNameOrId = opts['--project'];

  // retrieve dev command
  let link = await getLinkedProject(
    client,
    cwd,
    projectNameOrId,
    !!projectNameOrId
  );

  if (link.status === 'not_linked' && !process.env.__VERCEL_SKIP_DEV_CMD) {
    if (opts['--local']) {
      output.warn(
        'Running dev server in local mode without a project setup:\n' +
          '  - Environment variables will not be pulled from Vercel\n' +
          '  - Project settings are defined by local configuration\n\n' +
          `To link your project, run ${getCommandName('dev')} without \`-L\` or \`--local\` or ${getCommandName('link')}.`
      );
    } else if (projectNameOrId) {
      await printProjectNotFoundError(client, projectNameOrId, 'dev');
      return 1;
    } else {
      link = await setupAndLink(client, cwd, {
        autoConfirm: opts['--yes'],
        link,
        successEmoji: 'link',
        nonInteractive: client.nonInteractive,
      });

      if (link.status === 'not_linked') {
        // User aborted project linking questions
        return 0;
      }
    }
  }

  if (link.status === 'error') {
    if (link.reason === 'HEADLESS') {
      if (client.nonInteractive) {
        outputActionRequired(
          client,
          {
            status: 'action_required',
            reason: 'confirmation_required',
            message: `Command ${getCommandNamePlain('dev')} requires confirmation. Use option --yes to confirm.`,
            next: [