meta: add Github Reviews on new PR

.github/workflows/request-reviews.yml

@@ -0,0 +1,21 @@
+name: Request reviews for PRs
+
+on:
+  pull_request_target:
+    types: [opened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  main:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332  # v4.1.7
+        name: Checkout default branch
+      - uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea  # v7.0.1
+        name: Request reviews
+        with:
+          script: require('./tools/actions/request-reviews.js')(github, context);

tools/actions/request-reviews.js

@@ -0,0 +1,80 @@
+'use strict';
+
+const fs = require('node:fs');
+
+function globToRegex(glob) {
+  const patterns = {
+    '*': '([^\\/]+)',
+    '**': '(.+\\/)?([^\\/]+)',
+    '**/': '(.+\\/)',
+  };
+
+  const escapedGlob = glob.replace(/\./g, '\\.').replace(/\*\*$/g, '(.+)');
+  const regexString = '^(' + escapedGlob.replace(/\*\*\/|\*\*|\*/g, (match) => patterns[match] || '') + ')$';
+  return new RegExp(regexString);
+}
+
+class CodeOwners {
+  constructor(fileContent) {
+    this.owners = fileContent.split('\n')
+      .map((line) => line.trim())
+      .filter((line) => line && !line.startsWith('#'))
+      .map((line) => {
+        const [path, ...owners] = line.split(/\s+/);
+        return { path: globToRegex(path), owners };
+      });
+  }
+
+  getOwners(filePath) {
+    const normalizedPath = filePath.startsWith('/') ? filePath : `/${filePath}`;
+    return this.owners
+      .filter(({ path }) => path.test(normalizedPath))
+      .flatMap(({ owners }) => owners);
+  }
+}
+
+module.exports = async (client, context) => {
+  async function getChangedFiles(base, head) {
+    const { data } = await client.rest.repos.compareCommits({
+      owner: context.repo.owner,
+      repo: context.repo.repo,
+      base,
+      head,
+    });
+    return data.files.map((file) => file.filename);
+  }
+
+  const base = context.payload.pull_request?.base?.sha;
+  const head = context.payload.pull_request?.head?.sha;
+
+  if (!base || !head) {
+    throw new Error('Cannot get base or head commit');
+  }
+  const number = context.payload.pull_request.number;
+
+  // Get CODEOWNERS
+  const changedFiles = await getChangedFiles(base, head);
+  const codeOwners = new CodeOwners(fs.readFileSync('.github/CODEOWNERS', 'utf8'));
+  const owners = new Set();
+  changedFiles.forEach((file) => {
+    codeOwners.getOwners(file).forEach((owner) => owners.add(owner));
+  });
+
+  // Get team members
+  const reviewers = new Set();
+
+  for (const owner of owners) {
+    const teamMembers = await client.rest.teams.listMembersInOrg({
+      org: context.repo.owner,
+      team_slug: owner.split('/')[1],
+    });
+    teamMembers.data.forEach((member) => reviewers.add(member.login.toLowerCase()));
+  }
+
+  return client.rest.pulls.requestReviewers({
+    owner: context.repo.owner,
+    repo: context.repo.repo,
+    pull_number: number,
+    reviewers: [...reviewers],
+  });
+};