Function downloadUvTarball

packages/python/src/uv.ts:571–615

(url: string, dest: string)

}

async function downloadUvTarball(url: string, dest: string): Promise<void> {
  const tmpDest = `${dest}.${process.pid}.${Date.now()}.tmp`;
  const controller = new AbortController();
  const timeout = setTimeout(() => controller.abort(), 60_000);

  try {
    const response = await fetch(url, {
      redirect: 'follow',
      signal: controller.signal,
    });

    if (!response.ok) {
      throw new NowBuildError({
        code: 'RUNTIME_DEPENDENCY_INSTALLATION_FAILED',
        message: `could not download ${url}: HTTP ${response.status}`,
      });
    }

    if (!response.body) {
      throw new NowBuildError({
        code: 'RUNTIME_DEPENDENCY_INSTALLATION_FAILED',
        message: `could not download ${url}: response body was empty`,
      });
    }

    await pipeline(
      Readable.fromWeb(response.body),
      fs.createWriteStream(tmpDest)
    );
    await fs.promises.rename(tmpDest, dest);
  } catch (err) {
    await fs.promises.unlink(tmpDest).catch(() => {});
    if (err instanceof NowBuildError) {
      throw err;
    }
    throw new NowBuildError({
      code: 'RUNTIME_DEPENDENCY_INSTALLATION_FAILED',
      message: `could not download ${url}: ${
        err instanceof Error ? err.message : String(err)
      }`,
    });
  } finally {
    clearTimeout(timeout);
  }
}

async function sha256File(filePath: string): Promise<string> {
  const data = await fs.promises.readFile(filePath);