pub fn accumulate_predecessors(
new_ops: &[Operation],
old_ops: &[Operation],
) -> Result<BTreeMap<CommitId, Vec<CommitId>>, WalkPredecessorsError>Expand description
Collects predecessor records from new_ops to old_ops, and resolves
transitive entries.
This function assumes that there exists a single greatest common ancestors
between old_ops and new_ops. If old_ops and new_ops have ancestors
and descendants each other, or if criss-crossed merges exist between these
operations, the returned mapping would be lossy.