Function getPythonLambdaOptions

packages/python/src/index.ts:406–437

({
  config,
  entrypoint,
}: {
  config: BuildOptions['config'];
  entrypoint: string;
})

}

async function getPythonLambdaOptions({
  config,
  entrypoint,
}: {
  config: BuildOptions['config'];
  entrypoint: string;
}) {
  if (!config?.functions) {
    return {};
  }

  const sources = new Set<string>([entrypoint]);
  if (entrypoint.endsWith('.py')) {
    sources.add(entrypoint.slice(0, -'.py'.length));
  }

  for (const sourceFile of sources) {
    const lambdaOptions = await getLambdaOptionsFromFunction({
      sourceFile,
      config,
    });

    if (Object.keys(lambdaOptions).length > 0) {
      // Python resolves the target wheel platform before the Lambda is created,
      // so the Lambda architecture must stay aligned with that build target.
      delete lambdaOptions.architecture;
      return lambdaOptions;
    }
  }

  return {};
}

/**
 * Install a Vercel-owned Python package into the build venv, resolving the