GitLab: copy commit reference

Adds a "Copy commit reference" button to every commit page on GitLab.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         GitLab: copy commit reference
// @namespace    https://andrybak.dev
// @license      AGPL-3.0-only
// @version      10
// @description  Adds a "Copy commit reference" button to every commit page on GitLab.
// @homepageURL  https://gitlab.com/andrybak/copy-commit-reference-userscript
// @supportURL   https://gitlab.com/andrybak/copy-commit-reference-userscript/-/issues
// @author       Andrei Rybak
// @match        https://gitlab.com/*/-/commit/*
// @match        https://invent.kde.org/*/-/commit/*
// @match        https://gitlab.gnome.org/*/-/commit/*
// @match        https://code.europa.eu/*/-/commit/*
// @icon         https://gitlab.com/assets/favicon-72a2cad5025aa931d6ea56c3201d1f18e68a8cd39788c7c80d5b2b82aa5143ef.png
// @require      https://cdn.jsdelivr.net/gh/rybak/userscript-libs@e86c722f2c9cc2a96298c8511028f15c45180185/waitForElement.js
// @require      https://cdn.jsdelivr.net/gh/rybak/copy-commit-reference-userscript@4f71749bc0d302d4ff4a414b0f4a6eddcc6a56ad/copy-commit-reference-lib.js
// @grant        none
// ==/UserScript==

/*
 * Copyright (C) 2023-2025 Andrei Rybak
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published
 * by the Free Software Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

(function () {
	'use strict';

	/*
	 * Implementation for GitLab.
	 *
	 * Example URLs for testing:
	 *   - https://gitlab.com/andrybak/resoday/-/commit/b82824ec6dc3f14c3711104bf0ffd792c86d19ba
	 *   - https://invent.kde.org/education/kturtle/-/commit/8beecff6f76a4afc74879c46517d00657d8426f9
	 */
	class GitLab extends GitHosting {
		static #HEADER_SELECTOR = 'main#content-body .page-content-header > .header-main-content';

		getTargetSelector() {
			return GitLab.#HEADER_SELECTOR;
		}

		getButtonTagName() {
			return 'button'; // like GitLab's "Copy commit SHA"
		}

		wrapButton(button) {
			const copyShaButtonIcon = document.querySelector(`${GitLab.#HEADER_SELECTOR} > button > svg[data-testid="copy-to-clipboard-icon"]`);
			const icon = copyShaButtonIcon.cloneNode(true);
			button.replaceChildren(icon); // is just icon enough?
			button.classList.add('btn-sm', 'btn-default', 'btn-default-tertiary', 'btn-icon', 'btn', 'btn-clipboard', 'gl-button');
			button.setAttribute('data-toggle', 'tooltip'); // this is needed to have a fancy tooltip in style of other UI
			button.setAttribute('data-placement', 'bottom'); // this is needed so that the fancy tooltip appears below the button
			button.style = 'border: 1px solid darkgray;';
			button.title = this.getButtonText() + " to clipboard";
			return button;
		}

		getFullHash() {
			const copyShaButton = document.querySelector(`${GitLab.#HEADER_SELECTOR} > button`);
			return copyShaButton.getAttribute('data-clipboard-text');
		}

		getDateIso(hash) {
			// careful not to select <time> tag for "Committed by"
			const authorTimeTag = document.querySelector(`${GitLab.#HEADER_SELECTOR} > span + time`);
			return authorTimeTag.getAttribute('datetime').slice(0, 'YYYY-MM-DD'.length);
		}

		getCommitMessage(hash) {
			/*
			 * Even though vast majority will only need `subj`, gather everything and
			 * let downstream code handle paragraph splitting.
			 */
			const subj = document.querySelector('.commit-box .commit-title').innerText;
			const maybeBody = document.querySelector('.commit-box .commit-description');
			if (maybeBody == null) { // some commits have only a single-line message
				return subj;
			}
			const body = maybeBody.innerText;
			return subj + '\n\n' + body;
		}

		addButtonContainerToTarget(target, buttonContainer) {
			const authoredSpanTag = target.querySelector('& > span');
			target.insertBefore(buttonContainer, authoredSpanTag);
			// add spacer to make text "authored" not stick to the button
			target.insertBefore(document.createTextNode(" "), authoredSpanTag);
		}

		/*
		 * GitLab has a complex interaction with library ClipboardJS:
		 *
		 *   - https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/helpers/button_helper.rb#L31-68
		 *   - https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/assets/javascripts/behaviors/copy_to_clipboard.js#L63-94
		 *
		 *  and the native tooltips are even more complicated.
		 */
		createCheckmark() {
			const checkmark = super.createCheckmark();
			checkmark.style.left = 'calc(100% + 0.3rem)';
			checkmark.style.lineHeight = '1.5';
			checkmark.style.padding = '0.5rem 1.5rem';
			checkmark.style.textAlign = 'center';
			checkmark.style.width = 'auto';
			checkmark.style.borderRadius = '3px';
			checkmark.style.fontSize = '0.75rem';
			checkmark.style.fontFamily = '"Segoe UI", Roboto, "Noto Sans", Ubuntu, Cantarell, "Helvetica Neue", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji"';
			if (document.body.classList.contains('gl-dark')) {
				checkmark.style.backgroundColor = '#dcdcde';
				checkmark.style.color = '#1f1e24';
			} else {
				checkmark.style.backgroundColor = '#000';
				checkmark.style.color = '#fff';
			}
			return checkmark;
		}

		/**
		 * @returns {string}
		 */
		static #getIssuesUrl() {
			const newUiIssuesLink = document.querySelector('nav a[href$="/issues"]');
			if (newUiIssuesLink) {
				return newUiIssuesLink.href;
			}
			const oldUiIssuesLink = document.querySelector('aside a[href$="/issues"]');
			return oldUiIssuesLink.href;
		}

		async convertPlainSubjectToHtml(plainTextSubject, commitHash) {
			const escapedHtml = await super.convertPlainSubjectToHtml(plainTextSubject, commitHash);
			if (!escapedHtml.includes('#')) {
				return escapedHtml;
			}
			const issuesUrl = GitLab.#getIssuesUrl();
			return escapedHtml.replaceAll(/(?<!&)#([0-9]+)/g, `<a href="${issuesUrl}/\$1">#\$1</a>`);
		}
	}

	CopyCommitReference.runForGitHostings(new GitLab());
})();