npmcs/bin/parse_args.js

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/**
 * Pases command line arguments.
 * 
 * @returns 
 */
module.exports = function (args) {
  if (!Array.isArray(args)) {
    throw new Error('supplied args must be an array')
  }

  let commandToRun = args[2]

  if (!commandToRun) {
    throw new Error('npmcs: entry command (e.g start) must be supplied as an argument')
  }

  let customPlatform = args[3]

  let mode =
        customPlatform === 'production'
          ? 'production'
          : customPlatform === 'development' ? 'development' : args[4]

  customPlatform =
        customPlatform === 'production' || customPlatform === 'development'
          ? null
          : customPlatform

  return {
    /* The command to run */
    commandToRun,
    /* Set if the user has specified there own platform */
    customPlatform,
    /* production or development mode */
    mode
  }
}