An userscript to add "Sourcegraph" button on github.
// ==UserScript==
// @name GitHub Sourcegraph Button
// @namespace yikai.info
// @version 1.0.0
// @description An userscript to add "Sourcegraph" button on github.
// @author martianyi
// @match https://github.com/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
var rawUrl = '';
function replace(){
var rawBtn = document.querySelector('#raw-url');
if(rawUrl !== rawBtn.href){
rawUrl = rawBtn.href;
createButton(rawBtn);
}
}
function createButton(btn) {
var newBtn = btn.cloneNode(false);
newBtn.removeAttribute("id");
newBtn.setAttribute('class', 'btn btn-sm BtnGroup-item');
newBtn.textContent = "Sourcegraph";
newBtn.href = "";
newBtn.addEventListener('click', goToSourcegraph);
btn.parentNode.insertBefore(newBtn, btn.nextSibling);
if (!btn.parentNode.classList.contains("btn-group")) {
var parent = btn.parentNode,
group = document.createElement("div");
group.className = "btn-group";
while (parent.childNodes.length) {
group.appendChild(parent.childNodes[0]);
}
parent.appendChild(group);
}
}
function goToSourcegraph(event) {
event.preventDefault();
var pats = [
['^/([^/]+)/([^/]+)/tree/([^/]+)$', '/github.com/$1/$2@$3', '^/github.com/([^/]+)/([^/@]+)@([^/]+)$', '/$1/$2/tree/$3'],
['^/([^/]+)/([^/]+)/tree/([^/]+)/(.+)$', '/github.com/$1/$2@$3/-/tree/$4', '^/github.com/([^/]+)/([^/@]+)@([^/]+)/-/tree/(.+)$', '/$1/$2/tree/$3/$4'],
['^/([^/]+)/([^/]+)/blob/([^/]+)/(.+)$', '/github.com/$1/$2@$3/-/blob/$4', '', ''],
['^/([^/]+)/([^/]+)$', '/github.com/$1/$2', '^/github.com/([^/]+)/([^/]+)$', '/$1/$2'],
['^/([^/]+)$', '/$1', '^/([^/]+)$', '/$1'],
];
var pathname = window.location.pathname;
for (var i = 0; i < pats.length; i++) {
var pat = pats[i];
var r,
pathname2;
if (window.location.hostname === 'github.com') {
if (pat[0] === '') {continue;}
r = new RegExp(pat[0]);
if (pathname.match(r)) {
pathname2 = pathname.replace(r, pat[1]);
window.location = 'https://sourcegraph.com' + pathname2;
return;
}
} else {
if (pat[2] === '') { continue; }
r = new RegExp(pat[2]);
if (pathname.match(r)) {
pathname2 = pathname.replace(r, pat[3]);
window.location = 'https://github.com' + pathname2;
return;
}
}
}
alert('Unable to jump to Sourcegraph (no matching URL pattern).');
}
var container =
document.querySelector("#js-repo-pjax-container") ||
document.querySelector("#js-pjax-container");
if (container) {
new MutationObserver(function(){
replace();
}).observe(container, {childList: true, subtree: true});
}
replace();
})();