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GitHub Sourcegraph Button

An userscript to add "Sourcegraph" button on github.

当前为 2017-07-27 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         GitHub Sourcegraph Button
  3. // @namespace    yikai.info
  4. // @version      1.0.0
  5. // @description  An userscript to add "Sourcegraph" button on github.
  6. // @author       martianyi
  7. // @match        https://github.com/*
  8. // @grant        none
  9. // ==/UserScript==
  10.  
  11. (function() {
  12.     'use strict';
  13.     var rawUrl = '';
  14.  
  15.     function replace(){
  16.         var rawBtn = document.querySelector('#raw-url');
  17.         if(rawUrl !== rawBtn.href){
  18.             rawUrl = rawBtn.href;
  19.             createButton(rawBtn);
  20.         }
  21.     }
  22.  
  23.     function createButton(btn) {
  24.  
  25.         var newBtn = btn.cloneNode(false);
  26.         newBtn.removeAttribute("id");
  27.         newBtn.setAttribute('class', 'btn btn-sm BtnGroup-item');
  28.         newBtn.textContent = "Sourcegraph";
  29.         newBtn.href = "";
  30.         newBtn.addEventListener('click', goToSourcegraph);
  31.  
  32.         btn.parentNode.insertBefore(newBtn, btn.nextSibling);
  33.  
  34.         if (!btn.parentNode.classList.contains("btn-group")) {
  35.             var parent = btn.parentNode,
  36.                 group = document.createElement("div");
  37.             group.className = "btn-group";
  38.             while (parent.childNodes.length) {
  39.                 group.appendChild(parent.childNodes[0]);
  40.             }
  41.             parent.appendChild(group);
  42.         }
  43.     }
  44.  
  45.     function goToSourcegraph(event) {
  46.         event.preventDefault();
  47.         var pats = [
  48.             ['^/([^/]+)/([^/]+)/tree/([^/]+)$', '/github.com/$1/$2@$3', '^/github.com/([^/]+)/([^/@]+)@([^/]+)$', '/$1/$2/tree/$3'],
  49.             ['^/([^/]+)/([^/]+)/tree/([^/]+)/(.+)$', '/github.com/$1/$2@$3/-/tree/$4', '^/github.com/([^/]+)/([^/@]+)@([^/]+)/-/tree/(.+)$', '/$1/$2/tree/$3/$4'],
  50.             ['^/([^/]+)/([^/]+)/blob/([^/]+)/(.+)$', '/github.com/$1/$2@$3/-/blob/$4', '', ''],
  51.             ['^/([^/]+)/([^/]+)$', '/github.com/$1/$2', '^/github.com/([^/]+)/([^/]+)$', '/$1/$2'],
  52.             ['^/([^/]+)$', '/$1', '^/([^/]+)$', '/$1'],
  53.         ];
  54.         var pathname = window.location.pathname;
  55.         for (var i = 0; i < pats.length; i++) {
  56.             var pat = pats[i];
  57.             var r,
  58.                 pathname2;
  59.             if (window.location.hostname === 'github.com') {
  60.                 if (pat[0] === '') {continue;}
  61.                 r = new RegExp(pat[0]);
  62.                 if (pathname.match(r)) {
  63.                     pathname2 = pathname.replace(r, pat[1]);
  64.                     window.location = 'https://sourcegraph.com' + pathname2;
  65.                     return;
  66.                 }
  67.             } else {
  68.                 if (pat[2] === '') { continue; }
  69.                 r = new RegExp(pat[2]);
  70.                 if (pathname.match(r)) {
  71.                     pathname2 = pathname.replace(r, pat[3]);
  72.                     window.location = 'https://github.com' + pathname2;
  73.                     return;
  74.                 }
  75.             }
  76.         }
  77.         alert('Unable to jump to Sourcegraph (no matching URL pattern).');
  78.     }
  79.  
  80.     var container =
  81.         document.querySelector("#js-repo-pjax-container") ||
  82.         document.querySelector("#js-pjax-container");
  83.  
  84.     if (container) {
  85.         new MutationObserver(function(){
  86.             replace();
  87.         }).observe(container, {childList: true, subtree: true});
  88.     }
  89.  
  90.     replace();
  91. })();