How can I get a revision id's children?

Question

If you run this

Branch.open(repository_location).repository.get_revision(revision_id).parent_ids

it will return the parent_ids of the specified revision_id.

How can I do this same thing, but instead of returning the parent_ids it returns the children_ids?

I looked through the different properties in the API and didn't find one for children.

Answer 1

The only way in which you can get this information is to scan all the revisions in the repository:

child_revids = {}
revs = r.get_revisions(r.all_revision_ids())
for rev in revs:
    for parent_id in rev.parent_ids:
        child_revids.setdefault(parent_id, []).append(rev.revision_id)

You probably want to avoid doing this if at all possible, since its performance scales with the size of the repository.