std/_tools/check_deploy.ts

// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { retry } from "../async/retry.ts";

const projectName = "std-deploy-compat-test";
const branch = Deno.args[0];

if (!branch) {
  console.log("Usage: deno run deploy-check.ts <branch-name>");
  Deno.exit(1);
}

// branch name will be transformed by the following rules:
// - separators (/, ., or _) are replaced to "-"
// - non alphanumeric chars are removed (except "-")
// - truncated to 26 chars
// - trim the last "-"s
const branchId = branch
  .replace(/[_\/.]/g, "-")
  .replace(/[^a-zA-Z0-9-]/g, "")
  .slice(0, 26)
  .replace(/-+$/, "");

const deployName = branch === "main"
  ? projectName
  : `${projectName}--${branchId}`;

await retry(async () => {
  const hostname = `${deployName}.deno.dev`;
  console.log(`Checking ${hostname}`);
  const conn = await Deno.connectTls({ hostname, port: 443 });
  new ReadableStream({
    start(c) {
      c.enqueue(
        new TextEncoder().encode(
          `GET / HTTP/1.1\nHOST: ${hostname}\nConnection: close\n\n`,
        ),
      );
    },
  }).pipeTo(conn.writable);
  const text = await new Response(conn.readable).text();
  if (!text.endsWith("\r\n\r\nok")) {
    console.log(`${hostname} is unavailable`);
    throw new Error("failed");
  }
  console.log(`${hostname} is available`);
});