git log --statで出力されるInsertion(s)とDeletion(s)でグラフ表示

Gruntfile.coffee

module.exports = (grunt) ->
  grunt.initConfig
    connect:
      server:
        options:
          port: 0xBEEF
          hostname: "localhost"
          keepalive: true
          processMaxBuffer: 512*1024
          graphMaxY: 1000000
          middleware: (connect, options) ->
            data = ''
            {exec} = require 'child_process'
            command = 'git log --no-merges --stat | grep "files changed"'
            exec command, {maxBuffer: options.processMaxBuffer}, (e, o) -> data = o.toString('utf8')
            return [
              (req, res, next) ->
                res.setHeader 'Content-Type', 'text/html'
                res.end tmpl data: data, graphMaxY: options.graphMaxY
            ]
  grunt.loadNpmTasks 'grunt-contrib-connect'

tmpl = (data) -> """
<script src="http://ccchart.com/js/ccchart.js" charset="utf-8"></script>
<canvas id="chart"></canvas>
<textarea id="ta">#{data.data}</textarea>
<script>
var data = document.getElementById("ta").value;
data = data.split("\\n").reverse();
var nums = data.map(function(line, i){ return i + 2; });
nums.unshift("", 1);
var sum = 0;
var values = data.map(function(line){
  if(line.match(/(\\d+) insertion/)){ sum += +RegExp.$1; }
  if(line.match(/(\\d+) deletion/)){ sum -= +RegExp.$1; }
  return sum;
});
values.unshift("", 0);
var o = {
  config: {
    maxY: #{data.graphMaxY},
    width: document.body.offsetWidth,
    height: document.body.offsetHeight,
    type: "bezi2",
    bgGradient: {direction: "vertical", from:"#222", to:"#687478"}
  },
  data: [nums, values]
};
ccchart.init('chart', o);
</script>
"""

screenshot.png