ci: auto cleanup migrate/ branches

Author: std-microblock

.github/workflows/cleanup-migrate-branches.yml

@@ -0,0 +1,35 @@
+name: Cleanup Migrate Branches
+
+on:
+  schedule:
+    - cron: '0 0 * * *'
+  workflow_dispatch:
+
+jobs:
+  cleanup:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: "22"
+          cache: "npm"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run cleanup script
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_REPOSITORY_OWNER: ${{ github.repository_owner }}
+          GITHUB_REPOSITORY: ${{ github.repository }}
+        run: npm run cleanup-branches

migrate/cleanup-branches.ts

@@ -0,0 +1,110 @@
+import { Octokit } from "@octokit/rest";
+import { execSync } from "child_process";
+
+const GITHUB_TOKEN = process.env.GITHUB_TOKEN;
+const REPO_OWNER = process.env.GITHUB_REPOSITORY_OWNER || "owner";
+const REPO_NAME = process.env.GITHUB_REPOSITORY?.split("/")[1] || "cppdoc";
+
+if (!GITHUB_TOKEN) {
+  console.error("Missing GITHUB_TOKEN");
+  process.exit(1);
+}
+
+const octokit = new Octokit({ auth: GITHUB_TOKEN });
+
+async function getAllOpenPRs() {
+  const prs = [];
+  let page = 1;
+  const perPage = 100;
+
+  while (true) {
+    const { data } = await octokit.pulls.list({
+      owner: REPO_OWNER,
+      repo: REPO_NAME,
+      state: "open",
+      per_page: perPage,
+      page,
+    });
+    if (data.length === 0) break;
+    prs.push(...data);
+    if (data.length < perPage) break;
+    page++;
+  }
+
+  console.log(`Found ${prs.length} open PRs`);
+  return prs;
+}
+
+async function getAllBranches() {
+  const branches = [];
+  let page = 1;
+  const perPage = 100;
+
+  while (true) {
+    const { data } = await octokit.repos.listBranches({
+      owner: REPO_OWNER,
+      repo: REPO_NAME,
+      per_page: perPage,
+      page,
+    });
+    if (data.length === 0) break;
+    branches.push(...data);
+    if (data.length < perPage) break;
+    page++;
+  }
+
+  console.log(`Found ${branches.length} branches`);
+  return branches;
+}
+
+function filterMigrateBranches(branches: { name: string }[]) {
+  return branches.filter((b) => b.name.startsWith("migrate/"));
+}
+
+async function deleteBranch(branchName: string) {
+  try {
+    await octokit.git.deleteRef({
+      owner: REPO_OWNER,
+      repo: REPO_NAME,
+      ref: `heads/${branchName}`,
+    });
+    console.log(`Deleted remote branch ${branchName}`);
+  } catch (error) {
+    console.error(`Failed to delete branch ${branchName}:`, error);
+  }
+}
+
+async function main() {
+  console.log("Starting cleanup of migrate branches without open PRs...");
+
+  const [prs, branches] = await Promise.all([
+    getAllOpenPRs(),
+    getAllBranches(),
+  ]);
+
+  const prBranchNames = new Set(prs.map((pr) => pr.head.ref));
+  console.log("PR branches:", Array.from(prBranchNames));
+
+  const migrateBranches = filterMigrateBranches(branches);
+  console.log("Migrate branches:", migrateBranches.map(b => b.name));
+
+  const toDelete = migrateBranches.filter(b => !prBranchNames.has(b.name));
+  console.log(`Found ${toDelete.length} branches to delete:`);
+  toDelete.forEach(b => console.log(` - ${b.name}`));
+
+  if (toDelete.length === 0) {
+    console.log("No branches to delete.");
+    return;
+  }
+
+  for (const branch of toDelete) {
+    await deleteBranch(branch.name);
+  }
+
+  console.log("Cleanup completed.");
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});

package.json

@@ -9,7 +9,8 @@
     "preview": "astro preview",
     "astro": "astro",
     "format": "prettier --write .",
-    "migrate": "tsx ./migrate/migrate-bot.ts"
+    "migrate": "tsx ./migrate/migrate-bot.ts",
+    "cleanup-branches": "tsx ./migrate/cleanup-branches.ts"
   },
   "dependencies": {
     "@astrojs/starlight": "^0.36.2",