eruda/script/icomoon.js

// Navigate to https://icomoon.io/, import icomoon.json, download generated archive and extract it into icomoon folder.

var fs = require('fs'),
  path = require('path')

fs.readFile(path.resolve(__dirname, 'icomoon/fonts/icomoon.woff'), function(
  err,
  data
) {
  if (err) return console.log(err)

  genCssFile(data.toString('base64'))
})

function genCssFile(fontData) {
  fs.readFile(path.resolve(__dirname, 'icomoon/style.css'), 'utf-8', function(
    err,
    data
  ) {
    if (err) return console.log(err)

    data = data.split('\n')
    data.splice(
      2,
      5,
      "    src: url('data:application/x-font-woff;charset=utf-8;base64," +
        fontData +
        "') format('woff');"
    )
    data = data.join('\n')
    data = data.replace(/icon-"/g, 'eruda-icon-"')
    data = data.replace(/font-family: 'icomoon'/g, "font-family: 'eruda-icon'")

    writeCssFile(data)
  })
}

function writeCssFile(data) {
  fs.writeFile(
    path.resolve(__dirname, '../src/style/icon.css'),
    data,
    'utf-8',
    function(err, data) {
      if (err) return console.log(err)

      console.log('icon.css generated!')
    }
  )
}