Displays the total size of files in a GitHub repository (excluding .git directory) next to the repo name, using smart caching.
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// ==UserScript==
// @name GitHub Repository Size Checker (Excluding .git)
// @namespace https://greasyfork.org/users/1342408
// @version 1.0
// @description Displays the total size of files in a GitHub repository (excluding .git directory) next to the repo name, using smart caching.
// @author John Gray
// @match *://github.com/*/*
// @exclude *://github.com/*/issues*
// @exclude *://github.com/*/pulls*
// @exclude *://github.com/*/actions*
// @exclude *://github.com/*/projects*
// @exclude *://github.com/*/wiki*
// @exclude *://github.com/*/security*
// @exclude *://github.com/*/pulse*
// @exclude *://github.com/*/settings*
// @exclude *://github.com/*/branches*
// @exclude *://github.com/*/tags*
// @exclude *://github.com/*/*/commit*
// @exclude *://github.com/*/*/tree*
// @exclude *://github.com/*/*/blob*
// @exclude *://github.com/settings*
// @exclude *://github.com/notifications*
// @exclude *://github.com/marketplace*
// @exclude *://github.com/explore*
// @exclude *://github.com/topics*
// @exclude *://github.com/sponsors*
// @exclude *://github.com/dashboard*
// @exclude *://github.com/new*
// @exclude *://github.com/codespaces*
// @exclude *://github.com/account*
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_xmlhttpRequest
// @grant GM_registerMenuCommand
// @connect api.github.com
// @license MIT
// @homepage https://github.com/yookibooki/userscripts/tree/main/github-repo-size
// @supportURL https://github.com/yookibooki/userscripts/issues
// ==/UserScript==
(function() {
'use strict';
const CACHE_KEY = 'repoSizeCache';
const PAT_KEY = 'github_pat_repo_size';
const CACHE_EXPIRY_MS = 24 * 60 * 60 * 1000; // 24 hours
// --- Configuration ---
const GITHUB_API_BASE = 'https://api.github.com';
// Target element selector (this might change if GitHub updates its layout)
const TARGET_ELEMENT_SELECTOR = '#repo-title-component > span.Label.Label--secondary'; // The 'Public'/'Private' label
const DISPLAY_ELEMENT_ID = 'repo-size-checker-display';
// --- Styles ---
const STYLE_LOADING = 'color: orange; margin-left: 6px; font-size: 12px; font-weight: 600;';
const STYLE_ERROR = 'color: red; margin-left: 6px; font-size: 12px; font-weight: 600;';
const STYLE_SIZE = 'color: #6a737d; margin-left: 6px; font-size: 12px; font-weight: 600;'; // Use GitHub's secondary text color
let currentRepoInfo = null; // { owner, repo, key: 'owner/repo' }
let pat = null;
let displayElement = null;
let observer = null; // MutationObserver to watch for page changes
// --- Helper Functions ---
function log(...args) {
console.log('[RepoSizeChecker]', ...args);
}
function getRepoInfoFromUrl() {
const match = window.location.pathname.match(/^\/([^/]+)\/([^/]+)(?:\/?$|\/tree\/|\/find\/|\/graphs\/|\/network\/|\/releases\/)/);
if (match && match[1] && match[2]) {
// Basic check to avoid non-code pages that might match the pattern
if (document.querySelector('#repository-container-header')) {
return { owner: match[1], repo: match[2], key: `${match[1]}/${match[2]}` };
}
}
return null;
}
function formatBytes(bytes, decimals = 1) {
if (bytes === 0) return '0 Bytes';
const k = 1024;
const dm = decimals < 0 ? 0 : decimals;
const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
const i = Math.floor(Math.log(bytes) / Math.log(k));
return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
}
function getPAT() {
if (pat) return pat;
pat = GM_getValue(PAT_KEY, null);
return pat;
}
function setPAT(newPat) {
if (newPat && typeof newPat === 'string' && newPat.trim().length > 0) {
pat = newPat.trim();
GM_setValue(PAT_KEY, pat);
log('GitHub PAT saved.');
// Clear current error message if any
if (displayElement && displayElement.textContent?.includes('PAT Required')) {
updateDisplay('', STYLE_LOADING); // Reset display
}
// Re-run the main logic if PAT was missing
main();
return true;
} else {
GM_setValue(PAT_KEY, ''); // Clear stored PAT if input is invalid/empty
pat = null;
log('Invalid PAT input. PAT cleared.');
updateDisplay('Invalid PAT', STYLE_ERROR);
return false;
}
}
function promptForPAT() {
const newPat = prompt('GitHub Personal Access Token (PAT) required for API access. Please enter your PAT (needs repo scope):\n\nIt will be stored locally by Tampermonkey.', '');
if (newPat === null) { // User cancelled
updateDisplay('PAT Required', STYLE_ERROR);
return false;
}
return setPAT(newPat);
}
function getCache() {
const cacheStr = GM_getValue(CACHE_KEY, '{}');
try {
return JSON.parse(cacheStr);
} catch (e) {
log('Error parsing cache, resetting.', e);
GM_setValue(CACHE_KEY, '{}');
return {};
}
}
function setCache(repoKey, data) {
try {
const cache = getCache();
cache[repoKey] = data;
GM_setValue(CACHE_KEY, JSON.stringify(cache));
} catch (e) {
log('Error writing cache', e);
}
}
function updateDisplay(text, style = STYLE_SIZE, isLoading = false) {
if (!displayElement) {
const targetElement = document.querySelector(TARGET_ELEMENT_SELECTOR);
if (!targetElement) {
log('Target element not found.');
return; // Target element isn't on the page yet or selector is wrong
}
displayElement = document.createElement('span');
displayElement.id = DISPLAY_ELEMENT_ID;
targetElement.insertAdjacentElement('afterend', displayElement);
log('Display element injected.');
}
displayElement.textContent = isLoading ? `(${text}...)` : text;
displayElement.style.cssText = style;
}
function makeApiRequest(url, method = 'GET') {
return new Promise((resolve, reject) => {
const currentPat = getPAT();
if (!currentPat) {
reject(new Error('PAT Required'));
return;
}
GM_xmlhttpRequest({
method: method,
url: url,
headers: {
"Authorization": `token ${currentPat}`,
"Accept": "application/vnd.github.v3+json"
},
onload: function(response) {
if (response.status >= 200 && response.status < 300) {
try {
resolve(JSON.parse(response.responseText));
} catch (e) {
reject(new Error(`Failed to parse API response: ${e.message}`));
}
} else if (response.status === 401) {
reject(new Error('Invalid PAT'));
} else if (response.status === 403) {
const rateLimitRemaining = response.responseHeaders.match(/x-ratelimit-remaining:\s*(\d+)/i);
const rateLimitReset = response.responseHeaders.match(/x-ratelimit-reset:\s*(\d+)/i);
let errorMsg = 'API rate limit exceeded or insufficient permissions.';
if (rateLimitRemaining && rateLimitRemaining[1] === '0' && rateLimitReset) {
const resetTime = new Date(parseInt(rateLimitReset[1], 10) * 1000);
errorMsg += ` Limit resets at ${resetTime.toLocaleTimeString()}.`;
} else {
errorMsg += ' Check PAT permissions (needs `repo` scope).';
}
reject(new Error(errorMsg));
} else if (response.status === 404) {
reject(new Error('Repository not found or PAT lacks access.'));
}
else {
reject(new Error(`API request failed with status ${response.status}: ${response.statusText}`));
}
},
onerror: function(response) {
reject(new Error(`Network error during API request: ${response.error || 'Unknown error'}`));
},
ontimeout: function() {
reject(new Error('API request timed out.'));
}
});
});
}
async function fetchLatestDefaultBranchSha(owner, repo) {
log(`Fetching repo info for ${owner}/${repo}`);
const repoUrl = `${GITHUB_API_BASE}/repos/${owner}/${repo}`;
try {
const repoData = await makeApiRequest(repoUrl);
const defaultBranch = repoData.default_branch;
if (!defaultBranch) {
throw new Error('Could not determine default branch.');
}
log(`Default branch: ${defaultBranch}. Fetching its latest SHA.`);
const branchUrl = `${GITHUB_API_BASE}/repos/${owner}/${repo}/branches/${defaultBranch}`;
const branchData = await makeApiRequest(branchUrl);
return branchData.commit.sha;
} catch (error) {
log(`Error fetching latest SHA for ${owner}/${repo}:`, error);
throw error; // Re-throw to be caught by the main logic
}
}
async function fetchRepoTreeSize(owner, repo, sha) {
log(`Fetching tree size for ${owner}/${repo} at SHA ${sha}`);
const treeUrl = `${GITHUB_API_BASE}/repos/${owner}/${repo}/git/trees/${sha}?recursive=1`;
try {
const treeData = await makeApiRequest(treeUrl);
if (treeData.truncated && (!treeData.tree || treeData.tree.length === 0)) {
// Handle extremely large repos where even the first page is truncated without file list
throw new Error('Repo likely too large for basic tree API. Size unavailable.');
}
let totalSize = 0;
if (treeData.tree) {
treeData.tree.forEach(item => {
if (item.type === 'blob' && item.size !== undefined && item.size !== null) {
totalSize += item.size;
}
});
}
log(`Calculated size for ${owner}/${repo} (SHA: ${sha}): ${totalSize} bytes. Truncated: ${treeData.truncated}`);
return {
size: totalSize,
truncated: treeData.truncated === true // Ensure boolean
};
} catch (error) {
log(`Error fetching tree size for ${owner}/${repo}:`, error);
// Special handling for empty repos which return 404 for the tree SHA
if (error.message && error.message.includes('404') && error.message.includes('Not Found')) {
log(`Assuming empty repository for ${owner}/${repo} based on 404 for tree SHA ${sha}.`);
return { size: 0, truncated: false };
}
throw error; // Re-throw other errors
}
}
async function main() {
const repoInfo = getRepoInfoFromUrl();
// Exit if not on a repo page or already processed this exact URL path
if (!repoInfo || (currentRepoInfo && currentRepoInfo.key === repoInfo.key && currentRepoInfo.path === window.location.pathname)) {
// log('Not a repo page or already processed:', window.location.pathname);
return;
}
currentRepoInfo = { ...repoInfo, path: window.location.pathname }; // Store owner, repo, key, and full path
log('Detected repository:', currentRepoInfo.key);
// Ensure display element exists or create it
updateDisplay('loading', STYLE_LOADING, true);
// Check for PAT
if (!getPAT()) {
log('PAT not found.');
updateDisplay('PAT Required', STYLE_ERROR);
promptForPAT(); // Ask user for PAT
// If promptForPAT fails or is cancelled, the display remains 'PAT Required'
return; // Stop processing until PAT is provided
}
// --- Caching Logic ---
const cache = getCache();
const cachedData = cache[currentRepoInfo.key];
const now = Date.now();
if (cachedData) {
const cacheAge = now - (cachedData.timestamp || 0);
log(`Cache found for ${currentRepoInfo.key}: Age ${Math.round(cacheAge / 1000)}s, SHA ${cachedData.sha}`);
// 1. Check if cache is fresh (less than 24 hours)
if (cacheAge < CACHE_EXPIRY_MS) {
log('Cache is fresh (<24h). Using cached size.');
updateDisplay(
`${cachedData.truncated ? '~' : ''}${formatBytes(cachedData.size)}`,
STYLE_SIZE
);
return; // Use fresh cache
}
// 2. Cache is older than 24 hours, check if SHA matches current default branch head
log('Cache is stale (>24h). Checking latest SHA...');
updateDisplay('validating', STYLE_LOADING, true);
try {
const latestSha = await fetchLatestDefaultBranchSha(currentRepoInfo.owner, currentRepoInfo.repo);
log(`Latest SHA: ${latestSha}, Cached SHA: ${cachedData.sha}`);
if (latestSha === cachedData.sha) {
log('SHA matches. Reusing cached size and updating timestamp.');
// Update timestamp in cache
cachedData.timestamp = now;
setCache(currentRepoInfo.key, cachedData);
updateDisplay(
`${cachedData.truncated ? '~' : ''}${formatBytes(cachedData.size)}`,
STYLE_SIZE
);
return; // Use validated cache
} else {
log('SHA mismatch. Cache invalid. Fetching new size.');
}
} catch (error) {
log('Error validating SHA:', error);
updateDisplay(`Error: ${error.message}`, STYLE_ERROR);
// Optionally clear the stale cache entry if validation fails badly?
// delete cache[currentRepoInfo.key];
// GM_setValue(CACHE_KEY, JSON.stringify(cache));
return; // Stop if we can't validate
}
} else {
log(`No cache found for ${currentRepoInfo.key}.`);
}
// --- Fetching New Data ---
updateDisplay('loading', STYLE_LOADING, true);
try {
// We might have already fetched the SHA during cache validation
let latestSha = cachedData?.latestShaChecked; // Reuse if available from failed validation
if (!latestSha) {
latestSha = await fetchLatestDefaultBranchSha(currentRepoInfo.owner, currentRepoInfo.repo);
}
const { size, truncated } = await fetchRepoTreeSize(currentRepoInfo.owner, currentRepoInfo.repo, latestSha);
// Save to cache
const newData = {
size: size,
sha: latestSha,
timestamp: Date.now(),
truncated: truncated
};
setCache(currentRepoInfo.key, newData);
// Display result
updateDisplay(
`${truncated ? '~' : ''}${formatBytes(size)}`,
STYLE_SIZE
);
} catch (error) {
log('Error during main fetch process:', error);
let errorMsg = `Error: ${error.message}`;
if (error.message === 'Invalid PAT') {
errorMsg = 'Invalid PAT';
setPAT(''); // Clear invalid PAT
promptForPAT(); // Ask again
} else if (error.message === 'PAT Required') {
errorMsg = 'PAT Required';
promptForPAT();
}
updateDisplay(errorMsg, STYLE_ERROR);
}
}
// --- Initialization ---
function init() {
log("Script initializing...");
// Register menu command to update PAT
GM_registerMenuCommand('Set/Update GitHub PAT for Repo Size', () => {
const currentPatValue = GM_getValue(PAT_KEY, '');
const newPat = prompt('Enter your GitHub Personal Access Token (PAT) for Repo Size Checker (needs repo scope):', currentPatValue);
if (newPat !== null) { // Handle cancel vs empty string
setPAT(newPat); // Validate and save
}
});
// Use MutationObserver to detect navigation changes within GitHub (SPA behavior)
// and when the target element appears after load.
observer = new MutationObserver((mutationsList, observer) => {
// Check if the repo title area is present, indicating a potential repo page load/update
if (document.querySelector(TARGET_ELEMENT_SELECTOR) && !document.getElementById(DISPLAY_ELEMENT_ID)) {
// If the display element isn't there but the target is, try running main
log("Target element detected, running main logic.");
main();
} else {
// Also check if the URL path changed significantly enough to warrant a re-check
const newRepoInfo = getRepoInfoFromUrl();
if (newRepoInfo && (!currentRepoInfo || newRepoInfo.key !== currentRepoInfo.key)) {
log("Detected navigation to a new repository page.", newRepoInfo.key);
main();
} else if (!newRepoInfo && currentRepoInfo) {
// Navigated away from a repo page where we were showing info
log("Navigated away from repo page.");
currentRepoInfo = null; // Reset state
if (displayElement) {
displayElement.remove(); // Clean up old display element
displayElement = null;
}
}
}
});
// Start observing the body for changes in subtree and child list
observer.observe(document.body, { childList: true, subtree: true });
// Initial run in case the page is already loaded
main();
}
// Make sure the DOM is ready before trying to find elements
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', init);
} else {
init();
}
})();