Userscript to disable the Merge button inside GitGitGadget's Git pull requests

hide-gitgitgadget-git-merge-button.user.js

// ==UserScript==
// @name         Assorted helpful tweaks for GitGitGadget's Git fork
// @version      0.14
// @description  Removes the merge button on the GitHub `gitgitgadget/git` project, as PRs there are never to be merged. Adds more buttons.
// @source       https://gist.github.com/dscho/3ea2406669ae4097ca58971b41f9c9ed
// @match        https://github.com/gitgitgadget/git/pull/*
// @updateURL    https://gist.github.com/dscho/3ea2406669ae4097ca58971b41f9c9ed/raw/hide-gitgitgadget-git-merge-button.user.js
// @downloadURL  https://gist.github.com/dscho/3ea2406669ae4097ca58971b41f9c9ed/raw/hide-gitgitgadget-git-merge-button.user.js
// @run-at document-end
// @grant GM_xmlhttpRequest
// @connect api.github.com
// ==/UserScript==

(() => {
    const clearMergeButton = () => {
        ['merge', 'squash', 'rebase'].map((mode) => {
            for (const e of document.querySelectorAll(`.btn-group-${mode}`)) {
                e.style.display = 'none';
            }
        });
        for (const e of document.querySelectorAll('.js-merge-method-menu-button')) {
            e.style.display = 'none';
        }
    };

    clearMergeButton();
    new MutationObserver((events, observer) => {
        events.forEach((event) => {
            if (event.addedNodes) {
                clearMergeButton();
            }
        })
    }).observe(document, { attributes: true, childList: true, subtree: true });

    // Merge button gets reset after you add a comment for some reason, so hide it then too
    const form = document.querySelector('form.js-new-comment-form')
    form.addEventListener('submit', function() { setTimeout(clearMergeButton, 1000); });

    // Add a 'Resolve' button to all comments
    const comments = document.querySelectorAll('.js-comment-container');
    for (const comment of comments) {
        const h3 = comment.querySelector('.unminimized-comment .timeline-comment-header-text');
        if (!h3) continue;
        const reason = comment.querySelector('[aria-label="Reason"]');
        if (!reason) continue;
        const hideCommentButton = reason.parentNode.querySelector(".btn");
        if (!hideCommentButton) continue;

        const resolveButton = document.createElement('btn');
        resolveButton.classList.add('btn', 'btn-sm');
        resolveButton.innerHTML = 'Resolve';
        resolveButton.onclick = () => {
            reason.value = 'RESOLVED';
            hideCommentButton.click();
        };
        h3.appendChild(resolveButton);
    }

    // Add a prominent link to the gitgitgadget.git build
    const prNumbers = document.querySelectorAll('.gh-header-number');
    if (prNumbers.length > 0) {
        const addBuildLink = function(response) {
            response = JSON.parse(response.responseText);
            for (const prNumber of prNumbers) {
                const a = document.createElement('a');
                a.innerHTML = `Build ${response.conclusion}`;
                a.setAttribute('href', response.details_url);
                prNumber.parentElement.appendChild(a);
            }
        }

        for (const run of document.querySelectorAll('.merge-status-item')) {
            if (run.innerHTML.match(/>\s*gitgitgadget\.git\s*</)) {
                const actions = run.querySelectorAll('a.status-actions');
                const href = actions.length === 1 && actions[0].getAttribute('href');
                const match = href && href.match(/\?check_run_id=(\d+)/);
                if (match) {
                    GM_xmlhttpRequest({
                        method: 'GET',
                        headers: {
                            'Accept': 'application/vnd.github.antiope-preview+json',
                        },
                        url: `https://api.github.com/repos/gitgitgadget/git/check-runs/${match[1]}`,
                        onload: addBuildLink,
                    });
                }
            }
        }
    }
})();