eruda/script/coverage.js

var path = require('path'),
  util = require('./util'),
  istanbul = require('istanbul')

var collector = new istanbul.Collector(),
  reporter = new istanbul.Reporter()

var remappedJson = require('../coverage/coverage-remapped.json')

var coverage = util.reduce(
  util.keys(remappedJson),
  function(result, source) {
    if (isSrc()) {
      var correctPath = source.replace(
        path.resolve(__dirname, '../src'),
        path.resolve(__dirname, '../')
      )

      var val = remappedJson[source]
      val.path = correctPath
      result[correctPath] = val
    }

    function isSrc(src) {
      return (
        source.match(/src.*\.js$/) &&
        source.indexOf('node_modules') < 0 &&
        source.indexOf('util') < 0
      )
    }

    return result
  },
  {}
)

collector.add(coverage)

reporter.addAll(['html', 'lcov'])
reporter.write(collector, true, function() {
  console.log('open coverage/index.html to see the coverage report.')
})