double-wrap.js

var sw = require('spawn-wrap')
var argv = process.argv.slice(1).map(function (arg) {
  if (arg === __filename)
    arg = 'double-wrap.js'
  return arg
})

var node = process.execPath
var fg = require('foreground-child')

/*
main adds sw([first]), spawns 'parent'
first outputs some junk, calls runMain
parent adds sw([second]), spawns 'child'
second outputs some junk, calls runMain
child outputs some junk
*/

switch (process.argv[2]) {
  case 'main':
    console.error('main', process.pid, process.execArgv.concat(argv))
    sw([__filename, 'first'])
    fg(node, [__filename, 'parent'])
    break
  case 'first':
    console.error('first', process.pid, process.execArgv.concat(argv))
    sw.runMain()
    break
  case 'parent':
    console.error('parent', process.pid, process.execArgv.concat(argv))
    sw([__filename, 'second'])
    fg(node, [__filename, 'child'])
    break
  case 'second':
    console.error('second', process.pid, process.execArgv.concat(argv))
    sw.runMain()
    break
  case 'child':
    console.error('child', process.pid, process.execArgv.concat(argv))
    break
  default:
    console.error('expect:', [
      'start',
      'main',
      'first',
      'parent',
      'first',
      'second',
      'child'
    ])
    console.error('start!', process.pid, process.execArgv.concat(argv))
    fg(node, [__filename, 'main'])
    break
}