index.js

#! /usr/bin/env node
'use strict'

const {resolve} = require('path')
const {readFileSync} = require('fs')
const process = require('process')
const getStdIn = require('get-stdin')
const TempFile = require('./lib/temp-file.js')
const {stringify} = JSON
const {exit, argv, cwd} = process
const {info, error} = global.console

const success = message => {
  info(message)
  exit(0)
}

const failure = (message, code = 1) => {
  error(message)
  exit(code)
}

const main = filename =>
  stringify(require(String(filename)), undefined, 2)

const filename = argv[2]
if (filename) success(main(resolve(cwd(), filename)))

getStdIn()
  .then(
    value => {
      const string = String(value)
      if (!string) return failure(readFileSync(resolve(__dirname, 'help.txt'), 'utf8'), 0)
      const tmp = new TempFile({directory: cwd()})
      tmp.write(string)
      const result = main(tmp)
      tmp.unlink()
      return success(result)
    }
  )
  .catch(failure)