fingerprint method

@override Future<NativeStepFingerprint> fingerprint(NativeStepContext context)

Compute a fingerprint for this step based on its inputs.

Used for build caching to determine if a step needs to be re-executed.

Implementation

@override
Future<NativeStepFingerprint> fingerprint(NativeStepContext context) async {
  final buffer = StringBuffer();
  buffer.write(id);
  buffer.write(expandRecipeValue(url, context.buildContext, context.source));
  if (sha256 != null) {
    buffer.write(
      expandRecipeValue(sha256!, context.buildContext, context.source),
    );
  }
  return NativeStepFingerprint(
    id: id,
    hash: fingerprintHash(buffer.toString()),
  );
}