Tampermonkey script to clearly notify users of PR's that should not get approved/merged yet.

prblock.js

// ==UserScript==
// @name         Clearly notify for unstable builds in Bitbucket
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Clearly notifies the user if the PR should not be merged and/or approved.
// @author       Alex
// @match        https://bitbucket.org/vdgsecurity/vdg-vms/pull-requests/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    window.addEventListener('load', function () {
        try {
            var build_data_ele = document.querySelector('#pull-request-diff-header > div.aui-item.detail-summary--panel > ul > li:nth-child(1) > div > a > span:nth-child(1)');
            var build_data = JSON.parse(build_data_ele.getAttribute('data-status-counts'));
            appendMessage('<small>All systems are go!</small>', 0);
            if(build_data && build_data.SUCCESSFUL === 0) {
                appendMessage('<small>No successful builds.</small>');
            }
            if(build_data && build_data.INPROGRESS > 0) {
                appendMessage('<small>A build is in progress.</small>');
            }
        } catch(e) {
            if(window.location.href !== 'https://bitbucket.org/vdgsecurity/vdg-vms/pull-requests/' &&
              !window.location.href.startsWith('https://bitbucket.org/vdgsecurity/vdg-vms/pull-requests/new?')) {
                appendMessage('<small>Missing build data?</small>', 2);
            }
        }
    }, false);

    function appendMessage(msg = '', style = 1) {
        var css = 'position: absolute; float: right; right: 20px; top: 25px; background-color: white; width: 334px;';
        if(document.body.lastChild.style.cssText === css) {
            document.body.removeChild(document.body.lastChild);
        }
        var elem = document.createElement('span');
        elem.style.cssText = css;
        if(style === 0) {
            elem.innerHTML = `<br><h2><font color=green>You may merge/approve!</font></h2>${msg}`;
        } else if(style === 1) {
            elem.innerHTML = `<p>&nbsp;</p><p>&nbsp;</p><br><h2><font color=red>Do <strong>not</strong> merge/approve!</font></h2>${msg}`;
        } else if(style === 2) {
            elem.innerHTML = `<br><h2>Error!</h2>${msg}`;
        }
        document.body.appendChild(elem);
    }
})();

A messy script that was quickly hacked together. But it seems to work. These messages are not shown for the PR overview page and creation page.

Output:

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