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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.const prTitle = Deno.args[0];
if (prTitle == null) {  Deno.exit(0); // not a PR}
console.log("PR title:", prTitle);
// This is a release PR, so it's valid.if (/^[^\s]+\.[^\s]+\.[^\s]+$/.test(prTitle)) {  console.log("Valid.");  Deno.exit(0);}
const validPrefixes = [  "chore",  "fix",  "feat",  "perf",  "ci",  "cleanup",  "docs",  "bench",  "build",  "refactor",  "test",  // allow Revert PRs because it allows us to remove the landed  // commit from the generated changelog  "Revert ",  // allow Reland PRs because when editing the changelog, it helps us identify  // commits that were reverted, but then relanded  "Reland ",  // Allow landing breaking changes that are properly marked  "BREAKING",];
if (validPrefixes.some((prefix) => prTitle.startsWith(prefix))) {  console.log("Valid.");} else {  console.error(    "The PR title must start with one of the following prefixes:\n",  );  for (const prefix of validPrefixes) {    console.error(`  - ${prefix}`);  }  console.error(    "\nPlease fix the PR title according to https://www.conventionalcommits.org " +      "then push an empty commit to reset the CI.",  );  Deno.exit(1);}