Function deserializeOutput

packages/cli/src/util/dev/builder.ts:95–131

* Deserialize a single output object from its IPC-serialized form. * Converts JSON-ified Buffers back to real Buffers and reads temp files for large zipBuffers.

(
  obj: SerializedOutput
)

 * Converts JSON-ified Buffers back to real Buffers and reads temp files for large zipBuffers.
 */
async function deserializeOutput(
  obj: SerializedOutput
): Promise<BuilderOutput> {
  switch (obj.type) {
    case 'FileFsRef': {
      return Object.assign(Object.create(FileFsRef.prototype), obj);
    }
    case 'FileBlob': {
      const fileBlob: FileBlob = Object.assign(
        Object.create(FileBlob.prototype),
        obj
      );
      fileBlob.data = Buffer.from(obj.data.data);
      return fileBlob;
    }
    case 'Lambda': {
      const lambda: BuiltLambda = Object.assign(
        Object.create(Lambda.prototype),
        obj
      );
      // Convert the JSON-ified Buffer object back into an actual Buffer,
      // or read from temp file if it was too large for IPC
      if (obj.zipBufferPath) {
        lambda.zipBuffer = readFileSync(obj.zipBufferPath);
        // Clean up the temp file after reading
        try {
          unlinkSync(obj.zipBufferPath);
        } catch {
          // Ignore cleanup errors
        }
      } else if (obj.zipBuffer) {
        lambda.zipBuffer = Buffer.from(obj.zipBuffer.data);
      }
      return lambda;
    }
  }
}

/**
 * Deserialize all build outputs from their IPC-serialized form.