Function createDetectEntrypoint

packages/cli/src/util/projects/detect-entrypoint.ts:23–53

(
  projectRoot: string
)

 * environments) until a runtime framework is actually detected.
 */
export function createDetectEntrypoint(
  projectRoot: string
): DetectEntrypointFn {
  return async ({ workPath, framework }): Promise<DetectedEntrypoint> => {
    // Normalize to forward slashes so the path is platform-consistent;
    // Node's `fs` accepts either separator on Windows.
    const absWorkPath = normalizePath(join(projectRoot, workPath));
    // Builder packages ship without `.d.ts`; casts re-narrow the
    // `allowJs`-inferred return type back to `DetectedEntrypoint`.
    if (isPythonFramework(framework)) {
      const { detectEntrypoint } = await import('@vercel/python');
      return detectEntrypoint({
        workPath: absWorkPath,
        framework,
      }) as Promise<DetectedEntrypoint>;
    }
    if (isNodeBackendFramework(framework)) {
      const { detectEntrypoint } = await import('@vercel/backends');
      return detectEntrypoint({
        workPath: absWorkPath,
      }) as Promise<DetectedEntrypoint>;
    }
    if (framework === 'go') {
      const { detectEntrypoint } = await import('@vercel/go');
      return detectEntrypoint({
        workPath: absWorkPath,
      }) as Promise<DetectedEntrypoint>;
    }
    return null;
  };
}