chore: import upstream snapshot with attribution

clis/github/auth.js

@@ -0,0 +1,44 @@
+import { AuthRequiredError } from '@jackwener/opencli/errors';
+import { registerSiteAuthCommands } from '../_shared/site-auth.js';
+
+async function hasGithubSessionCookies(page) {
+  const cookies = await page.getCookies({ url: 'https://github.com' });
+  const names = new Set(cookies.map(cookie => cookie.name));
+  return names.has('user_session') || names.has('dotcom_user') || names.has('logged_in');
+}
+
+async function verifyGithubIdentity(page) {
+  await page.goto('https://github.com/settings/profile');
+  await page.wait(1);
+  const identity = await page.evaluate(`() => {
+    const meta = (name) => document.querySelector('meta[name="' + name + '"]')?.getAttribute('content') || '';
+    const username = meta('octolytics-actor-login');
+    const id = meta('octolytics-actor-id');
+    const name = document.querySelector('input#user_profile_name')?.value || '';
+    return { username, id, name, url: location.href };
+  }`);
+  if (!identity?.username || /\/login(?:\?|$)/.test(String(identity?.url ?? ''))) {
+    throw new AuthRequiredError('github.com', 'Could not detect a logged-in GitHub account');
+  }
+  return {
+    id: identity.id || '',
+    username: identity.username,
+    name: identity.name || '',
+    url: `https://github.com/${identity.username}`,
+  };
+}
+
+registerSiteAuthCommands({
+  site: 'github',
+  domain: 'github.com',
+  loginUrl: 'https://github.com/login',
+  columns: ['id', 'username', 'name', 'url'],
+  quickCheck: hasGithubSessionCookies,
+  verify: verifyGithubIdentity,
+  poll: async (page) => {
+    if (!await hasGithubSessionCookies(page)) {
+      throw new AuthRequiredError('github.com', 'Waiting for GitHub session cookies');
+    }
+    return verifyGithubIdentity(page);
+  },
+});