Function createPseudoLayer

packages/next/src/utils.ts:1049–1078

(files: {
  [fileName: string]: FileFsRef;
})

};

export async function createPseudoLayer(files: {
  [fileName: string]: FileFsRef;
}): Promise<PseudoLayerResult> {
  const pseudoLayer: PseudoLayer = {};
  let pseudoLayerBytes = 0;

  for (const fileName of Object.keys(files)) {
    const file = files[fileName];

    if (isSymbolicLink(file.mode)) {
      const symlinkTarget = await fs.readlink(file.fsPath);
      pseudoLayer[fileName] = {
        file,
        isSymlink: true,
        symlinkTarget,
      };
    } else {
      const origBuffer = await streamToBuffer(file.toStream());
      pseudoLayerBytes += origBuffer.byteLength;
      pseudoLayer[fileName] = {
        file,
        isSymlink: false,
        crc32: crc32.unsigned(origBuffer),
        uncompressedSize: origBuffer.byteLength,
      };
    }
  }

  return { pseudoLayer, pseudoLayerBytes };
}

export interface CreateLambdaFromPseudoLayersOptions
  extends LambdaOptionsWithFiles {