apply method

Future<HashlinePatcherApplyResult> apply(
  1. HashlinePatch patch
)

Applies every section in patch. prepare runs the full apply for each section in memory before any write hits the filesystem, so a multi-section batch is naturally all-or-nothing. Returns one HashlineSectionResult per section in the original patch order.

Implementation

Future<HashlinePatcherApplyResult> apply(HashlinePatch patch) async {
  // Single-section fast path.
  if (patch.sections.length == 1) {
    final prepared = await prepare(patch.sections[0]);
    return HashlinePatcherApplyResult(sections: [await commit(prepared)]);
  }

  // Prepare every section first so any failure (stale hash, missing
  // file, parse error, in-memory no-op) surfaces before any write.
  final prepared = await _prepareAll(patch.sections);
  _assertUniqueCanonicalPaths(prepared);
  _assertNoneNoop(prepared);
  return HashlinePatcherApplyResult(sections: await _commitAll(prepared));
}