simple script for running a command until it breaks

runner.js

#!/usr/bin/env node

var spawn = require('child_process').spawn
var argv = process.argv.slice(2)

if (argv.length === 0) {
  console.log('missing command')
}

var cmd = argv[0]
var args = argv.splice(1)

var runs = 0
var success = 0
var fail = 0

// todo: be able to run:

// 1. until it breaks, or
// 2. until `runs` reaches some upper limit

function run() {
  // todo: if should be quiet .. do not inherit stdio
  var child = spawn(cmd, args, { stdio: 'inherit' })
  ++runs
  child.on('close', function (code) {
    if (code === 0) {
      ++success
      process.nextTick(run)
    }
    else {
      ++fail
      printStats()
    }
  })
  child.on('error', function (err) {})
}

process.on('SIGINT', function () {
  printStats()
  process.exit(0)
})

function printStats() {
  console.log('\nran %d times', runs)
  console.log('succeeded %d times', success)
  console.log('failed %d times', fail)
}

run()

This is a wip. Should also show how long it took, average time and things like that. Could also potentially parse tap output to produce an aggregated tap output.