Fetch non-entrypoint, non-TypeScript files from jsr:, write files to local vendor directory containing enttrypoint .ts file

fetch-jsr-files.js

// Fetch non-entrypoint, non-TypeScript files from jsr:,
// write files to local vendor directory containing enttrypoint .ts file
// Usage: deno -A fetch-jsr-files.js @scope mod

const [scope, mod] = Deno.args;

const { latest: version } = (await import(
  `https://jsr.io/${scope}/${mod}/meta.json`,
  {
    with: {
      type: "json",
    },
  }
)).default;

const url = `https://jsr.io/${scope}/${mod}/${version}_meta.json`;

const { manifest } = (await import(url, {
  with: {
    type: "json",
  },
})).default;

for (const filePath of Object.keys(manifest)) {
  const jsrRemoteUrl = new URL(
    `.${filePath}`,
    url.split(/(?<!:\/)\//).toSpliced(-1, 0, version).join("/"),
  );
  const { hostname, pathname } = jsrRemoteUrl;
  const jsrLocalPath = new URL(
    `./vendor/${hostname}${pathname}`,
    import.meta.url,
  );
  const mode = /((\.(md|json))|LICENSE)$/.test(jsrRemoteUrl.href)
    ? 0o777
    : 0o764;
  console.log(
    `Fetching ${jsrRemoteUrl}, writing file to ${jsrLocalPath.pathname}, mode ${mode}`,
  );
  const file = await (await fetch(jsrRemoteUrl)).bytes();
  await Deno.writeFile(jsrLocalPath.pathname, file, {
    mode,
  });
}

console.log(`Done fetching files from ${url}`);