Function transformContents

packages/shared/src/utils/polyvinyl.ts:118–125

(
  wrap: Wrapper,
  polyP: ChallengeFile | Promise<ChallengeFile>
)

// already contains a source, this version will continue as
// the source property
export async function transformContents(
  wrap: Wrapper,
  polyP: ChallengeFile | Promise<ChallengeFile>
) {
  const poly = await polyP;
  const newPoly = setContent(await wrap(poly.contents), poly, poly.source);
  return newPoly;
}

// createSource(poly: PolyVinyl) => PolyVinyl
export function createSource<Rest>(