git pushで新記事を自動インデックス申請する（Google Indexing API + GitHub Actions）

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POST https://indexing.googleapis.com/v3/urlNotifications:publish

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{
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  "url": "https://your-site.com/blog/new-post/",
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  "type": "URL_UPDATED"
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}

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import { GoogleAuth } from 'google-auth-library';
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import { execSync } from 'child_process';
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const SITE_URL = process.env.SITE_URL ?? 'https://45395.jp';
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const BLOG_CONTENT_DIR = 'src/content/blog/';
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const INDEXING_API_ENDPOINT = 'https://indexing.googleapis.com/v3/urlNotifications:publish';
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const DRY_RUN = process.env.DRY_RUN === 'true';
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// git diff で変更されたブログ記事ファイルを取得し、公開 URL に変換する
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function getChangedBlogUrls() {
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  let diffOutput;
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  try {
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    diffOutput = execSync('git diff --name-only HEAD~1 HEAD', { encoding: 'utf-8' });
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  } catch {
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    // HEAD~1 が存在しない場合（初回コミットなど）はスキップ
77 collapsed lines
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    console.log('git diff に失敗しました。スキップします。');
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    return [];
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  }
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  return diffOutput
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    .split('\n')
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    .map(f => f.trim())
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    .filter(f => f.startsWith(BLOG_CONTENT_DIR) && f.endsWith('.md'))
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    .map(f => {
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      const slug = f.replace(BLOG_CONTENT_DIR, '').replace(/\.md$/, '');
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      return `${SITE_URL}/blog/${slug}/`;
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    });
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}
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async function submitUrl(client, url) {
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  const response = await client.request({
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    url: INDEXING_API_ENDPOINT,
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    method: 'POST',
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    data: { url, type: 'URL_UPDATED' },
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  });
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  return response.data;
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}
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async function main() {
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  const serviceAccountJson = process.env.GSC_INDEXING_SERVICE_ACCOUNT;
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  if (!serviceAccountJson) {
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    console.log('GSC_INDEXING_SERVICE_ACCOUNT が未設定のためスキップします。');
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    process.exit(0);
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  }
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  const urls = getChangedBlogUrls();
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  if (urls.length === 0) {
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    console.log('変更されたブログ記事はありません。');
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    process.exit(0);
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  }
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  console.log(`インデックス申請対象: ${urls.length} 件`);
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  urls.forEach(url => console.log(`  ${url}`));
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  if (DRY_RUN) {
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    console.log('\n[DRY RUN] 申請はスキップされました。');
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    process.exit(0);
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  }
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  const auth = new GoogleAuth({
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    credentials: JSON.parse(serviceAccountJson),
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    scopes: ['https://www.googleapis.com/auth/indexing'],
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  });
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  const client = await auth.getClient();
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  let successCount = 0;
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  let failCount = 0;
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  for (const url of urls) {
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    try {
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      const result = await submitUrl(client, url);
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      console.log(`✓ ${url} (notifyTime: ${result.urlNotificationMetadata?.latestUpdate?.notifyTime ?? '-'})`);
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      successCount++;
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    } catch (err) {
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      const status = err.response?.status ?? 'unknown';
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      const message = err.response?.data?.error?.message ?? err.message;
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      console.error(`✗ ${url} [HTTP ${status}]: ${message}`);
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      failCount++;
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    }
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  }
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  console.log(`\n完了: 成功 ${successCount} 件 / 失敗 ${failCount} 件`);
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  if (successCount === 0 && failCount > 0) {
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    process.exit(1);
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  }
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}
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main().catch(err => {
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  console.error('予期しないエラー:', err);
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  process.exit(1);
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});

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execSync('git diff --name-only HEAD~1 HEAD', { encoding: 'utf-8' })

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src/content/blog/gsc-indexing-api.md
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→ https://45395.jp/blog/gsc-indexing-api/

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const auth = new GoogleAuth({
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  credentials: JSON.parse(serviceAccountJson),
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  scopes: ['https://www.googleapis.com/auth/indexing'],
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});
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const client = await auth.getClient();

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if (successCount === 0 && failCount > 0) {
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  process.exit(1);
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}

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{
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  "devDependencies": {
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    "google-auth-library": "^9.0.0"
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  }
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}

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git push origin main
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    │
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    ▼
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GitHub Actions
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    ├─ pnpm install && pnpm build
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    ├─ firebase deploy          → Firebase Hosting に公開
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    └─ node request-indexing.mjs
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           │
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           ├─ git diff で変更した .md ファイルを検出
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           ├─ URL に変換
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           └─ Google Indexing API に POST
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                  → Google が数時間〜数日でクロール・インデックス

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- name: Ping Google sitemap
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  run: curl "https://www.google.com/ping?sitemap=https://45395.jp/sitemap-index.xml"