code: function(env, action) {
    if (!env.modulePath) {
      console.log(chalk.red('Local azul not found in'),
        chalk.magenta(tildify(env.cwd)));
      console.log(chalk.red('Try running: npm install azul'));
      process.exit(1);
    }
  
    if (!env.configPath && action.azulfile) {
      console.log(chalk.red('No azulfile found'));
      process.exit(1);
    }
  }
docs: Verify the Liftoff environment and exit the program if we are not in a
  suitable environment to operate.
  
  @private
  @function cli.verifyEnvironment
  @param {Object} env The liftoff environment.