numstatall - pipe the output of `git diff --numstat <commit-ish>` to get total add and deletions

numstatall.coffee

#!/usr/bin/env coffee

readline = require 'readline'

rl = readline.createInterface 
  input: process.stdin
  terminal: false

stat = {add: 0, del: 0}

rl.on 'line', (line)-> 
  diff = line.split '\t'
  if diff.length == 3
    add = parseInt diff[0]
    del = parseInt diff[1]
    if !isNaN(add) && !isNaN(del)
      stat.add += add 
      stat.del += del

format = (num)->
  num.toString().replace /(\d)(?=(\d{3})+(?!\d))/g, "$1,"

rl.on 'close', ()->
  console.log "total add: #{format(stat.add)} del: #{format(stat.del)}"