Super mod: Update license year

license-year.js

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

module.exports = {
  getOptions: function () {
    return []
  },
  
  run: function (directory) {
    var potentialNames = ['LICENSE', 'LICENSE.md', 'license', 'license.md']
    var filepath
    for (var i = 0; i < potentialNames.length; i++) {
      var testFilepath = path.join(directory, potentialNames[i])
      if (fs.existsSync(testFilepath)) {
        filepath = testFilepath
        break
      }
    }
    
    if (!filepath) {
      console.error('"' + filepath + '" was not found, cannot update license year')
      return Promise.resolve()
    }
    
    return new Promise(function (resolve, reject) {
      fs.readFile(filepath, {encoding: 'utf8'}, function (error, text) {
        error ? reject(error) : resolve(text)
      })
    }).then(function (text) {
      var year = (new Date).getFullYear()
      var newCopyrightDate = '(c) ' + year
      var newText = text.replace(/\(c\) 20\d\d/, newCopyrightDate)
      if (newText === text) {
        if (newText.indexOf(newCopyrightDate) !== -1) {
          console.error('Copyright year is already this year, nothing to update.')
        } else {
          console.error('Copyright year was not found, unable to update.')
        }
      }
      return newText
    }).then(function (newText) {
      return new Promise(function (resolve, reject) {
        fs.writeFile(filepath, newText, function (error) {
          error ? reject(error) : resolve()
        })
      })
    })
  }
}