Function loadTransformModule

src/providers/transformUtils.ts:40–63

(
  transform: string | Function | undefined,
)

 * @returns The loaded function, or the original value if not a file:// reference
 */
export async function loadTransformModule(
  transform: string | Function | undefined,
): Promise<string | Function | undefined> {
  if (!transform) {
    return transform;
  }
  if (typeof transform === 'function') {
    return transform;
  }
  if (typeof transform === 'string' && transform.startsWith('file://')) {
    const { filename, functionName } = parseFileTransformReference(transform);
    const requiredModule = await importModule(
      path.resolve(cliState.basePath || '', filename),
      functionName,
    );
    if (typeof requiredModule === 'function') {
      return requiredModule;
    }
    throw new Error(
      `Transform module malformed: ${filename} must export a function or have a default export as a function`,
    );
  }
  return transform;
}