GitHub Pages Switcher Bookmarklet

github-pages-bookmarklet.js

/**
 * Detects the GitHub URL and redirects:
 * - From Repo to Pages
 * - or from Pages to Repo
 */

javascript:(function () {
  var url = document.location.href,
    username,
    repo,
    finalUrl
  ;

  if (!url.match(/github/)) { return; }

  url = url.replace(/https?\:\/\//, '');

  if (url.match(/github\.io/)) {
    username = url.match(/.+\.github/)[0].replace(/\.github/, '');
    repo = url.match(/\.github\.io\/([^\/]+)/)[1];
    finalUrl = 'https://github.com/' + username + '/' + repo;
  } else {
    username = url.match(/github.com\/([^\/]+)/)[1];
    repo = url.match(new RegExp('github\.com\/' + username +'/([^\/]+)'))[1];
    finalUrl = 'http://' + username + '.github.io/' + repo;
  }

  window.open(finalUrl);
}());