User script to toggle between a global search and repo searches on GitHub.

github-search-toggler.user.js

// ==UserScript==
// @name         GitHub SearchToggler
// @namespace    87901be6f9d184fd17613010a80448e2
// @version      0.2
// @description  Toggle between a global search and repo searches on GitHub.
// @author       Sam Saint-Pettersen <[email protected]>
// @match        https://github.com/*
// @icon         https://github.com/favicon.ico
// @require      http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// ==/UserScript==

(function() {
    'use strict';
    const crepo = $('form').attr('action');
    let user = $('meta[name=user-login]').attr('content');
    let urepos = '/search?utf8=\u2713&q=$query+user%3A$user&type=Repositories&ref=advsearch&l=&l=';
    let scope = -1;
    $('.header-search-scope').attr('title', 'Click to toggle search between this repo, your repos and all of GitHub.');
    $('.header-search-scope').click(function (event) {
        event.preventDefault();
        scope++;
        if (scope === 0 ) {
            $(this).text('All repositories');
            $('form').attr('action', '/search');
        } else if (scope === 1) {
            if (user.length === 0) user = 'github'; // Use 'github' if not logged in.
            $(this).text('Your repositories');
            $('form').attr('action', '/search');
            $(document).keypress(function (event) {
                if (event.keyCode === 13 && scope === 1) {
                    event.preventDefault();
                    urepos = urepos.replace('$user', user);
                    window.location.href = urepos.replace('$query', $('.js-site-search-field').val());
                }
            });
        } else if (scope === 2) {
            scope = -1;
            $(this).text('This repository');
            $('form').attr('action', crepo);
        }
    });
})();

https://imgur.com/a/R9114