GitHub PR Copy Diff

Adds a "Copy Diff" button to the PR nav that copies the unified diff to the clipboard
Verzia zo dňa 04.06.2026. Pozri najnovšiu verziu.
Spýtať sa otázku, uverejniť recenziu, alebo nahlásiť skript.
Zalomiť riadky
// ==UserScript==
// @name         GitHub PR Copy Diff
// @namespace    http://tampermonkey.net/
// @icon         https://github.githubassets.com/favicons/favicon-dark.png
// @version      2026.06.04.1
// @description  Adds a "Copy Diff" button to the PR nav that copies the unified diff to the clipboard
// @author       KakkoiDev
// @match        https://github.com/*
// @grant        GM_xmlhttpRequest
// @grant        GM_setClipboard
// @connect      github.com
// @connect      githubusercontent.com
// @license      MIT
// ==/UserScript==

// Broad @match needed: GitHub uses SPA navigation, so the MutationObserver
// re-adds the button as the PR header re-renders.
//
// GM_xmlhttpRequest + GM_setClipboard (not fetch + navigator.clipboard):
// github.com/<o>/<r>/pull/<n>.diff 302-redirects cross-origin to
// patch-diff.githubusercontent.com with no CORS header, so a page fetch is
// blocked. GM_xmlhttpRequest bypasses CORS and sends cookies (private PRs).

(function() {
    'use strict';

    function getPrInfo() {
        const m = location.pathname.match(/^\/([^/]+)\/([^/]+)\/pull\/(\d+)/);
        if (!m) return null;
        return { owner: m[1], repo: m[2], number: m[3] };
    }

    function flash(btn, msg) {
        btn.textContent = msg;
        btn.disabled = false;
        setTimeout(() => { btn.textContent = 'Copy Diff'; }, 1500);
    }

    function copyDiff(btn) {
        const pr = getPrInfo();
        if (!pr) return;
        const diffUrl = `${location.origin}/${pr.owner}/${pr.repo}/pull/${pr.number}.diff`;
        btn.disabled = true;
        btn.textContent = 'Copying...';
        GM_xmlhttpRequest({
            method: 'GET',
            url: diffUrl,
            onload: (res) => {
                if (res.status >= 200 && res.status < 300) {
                    GM_setClipboard(res.responseText, 'text');
                    flash(btn, 'Copied!');
                } else {
                    flash(btn, 'Failed');
                }
            },
            onerror: () => flash(btn, 'Failed'),
        });
    }

    function addCopyDiffButton() {
        const pr = getPrInfo();
        if (!pr) return;

        const filesTab = document.querySelector('#prs-files-anchor-tab')
            || document.querySelector(`a[href$="/pull/${pr.number}/files"]`);
        if (!filesTab) return;
        if (document.getElementById('gh-copy-diff-btn')) return;

        const btn = document.createElement('button');
        btn.id = 'gh-copy-diff-btn';
        btn.type = 'button';
        btn.className = 'btn btn-sm';
        btn.textContent = 'Copy Diff';
        btn.style.marginLeft = '8px';
        btn.addEventListener('click', (e) => {
            e.preventDefault();
            e.stopPropagation();
            copyDiff(btn);
        });

        filesTab.insertAdjacentElement('afterend', btn);
    }

    addCopyDiffButton();

    const observer = new MutationObserver(() => {
        addCopyDiffButton();
    });

    observer.observe(document.body, {
        childList: true,
        subtree: true
    });
})();