are the order of dependencies returned by

Get(TransitiveTargets, TransitiveTargetsRequest)

deterministic? And can I rely on them to be a top-down order of dependedness? I.e. would this pass:

seen = set()
for target in transitive_targets.dependencies[::-1]:
  assert set(target.dependencies).issubset(seen)
  seen.add(target)

I think so, since

transitive_targets.dependencies

is a FrozenOrderedSet the values should always be sorted. Likely by alphabetical order of the target address but I’m not sure.

possibly relevant though: https://github.com/pantsbuild/pants/issues/14719

From what I'm understanding from this. You can rely on the order, but not in any meaningfully helpful way. And i'm going to need to recalculate the order to determine the "leaf" dependencies.

hm that did jolt my memory, see the below tests: https://github.com/pantsbuild/pants/blob/a95d9ce4eb30c85e220358f83b9a4868053d0f63/src/python/pants/engine/internals/graph_test.py#L144