github.js

// ==UserScript==
// @name        Adds Metadata on Github Pull Request
// @namespace   http://github.com/richardfullmer
// @include     https://github.com/*/*/pulls*
// @version     3
// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// ==/UserScript==
$(function() {
    var access_token = "your_token";
    $(".pulls-list .list-group-item h4").each(function() {
        var pull_request = this;
        $(pull_request).addClass("issues-list");
        
        //var issue_href = $("a:first", pull_request).attr("href").replace('/pull/', '/issues/');
        //$.getJSON("https://api.github.com/repos" + issue_href + "?access_token=" + access_token, function(issue) {
        //    $.each(issue.labels, function(l_i, label) {
        //        var label_html = $('<span class="labels"><span style="background-color: #' + label.color + ' !important; color: #333 !important" data-name="' + label.name + '" class="label">' + label.name + '</span></span>');
        //        $(pull_request).append(label_html);
        //    }); 
        //});  
                
        var pr_href = $("a:first", pull_request).attr("href").replace('/pull/', '/pulls/');
        $.getJSON("https://api.github.com/repos" + pr_href + "?access_token=" + access_token, function(pr) {
            var pr_target_html = $('<span style="margin-left: 0; margin-right: 4px;" class="labels"><span style="background-color: #EEEEEE !important; color: #333 !important" class="label" title="Target branch">' + pr.base.ref + '</span></span>');
            $(pull_request).prepend(pr_target_html);
            
            if (pr.mergeable) {
                var pr_mergeable_html = $('<span class="labels"><span style="background-color: #d8f5cd !important; color: #333 !important" class="label">mergeable</span></span>');
            } else {
                var pr_mergeable_html = $('<span class="labels"><span style="background-color: #f7c6c7 !important; color: #333 !important" class="label">rebase</span></span>');
            }
            $(pull_request).append(pr_mergeable_html);
            
            $.getJSON(pr._links.statuses.href + "?access_token=" + access_token, function(statuses) {
                if (statuses.length > 0) {
                    var current_status = statuses[0]; 
                    var color = '#ececec';
                    switch (current_status.state) {
                        case 'pending':
                            color = '#f8eec7'; 
                            break;
                        case 'success':
                            color = '#d8f5cd';
                            break;
                        case 'error':
                            color = '#eeeeee';
                            break;
                        case 'failure':
                            color = '#f7c6c7';
                            break;
                    }
                    
                    var current_status_html = $('<span class="labels"><span style="background-color: ' + color + ' !important; color: #333 !important" class="label" title="' + current_status.description + '">' + current_status.state + '</span></span>');
                    $(pull_request).append(current_status_html);
                }
            });
        });
    });
});