Overlapping roots across multiple bundles - open-policy-agent

Question

I was trying to understand the significance of roots.
As per the docs,
The roots are not overlapping (e.g., a/b/c and a/b are overlapped and will result in an error.) Note: This is not enforced across multiple bundles. Only within the same bundle manifest.
So, I loaded two bundles with same .manifest files with the hope that OPA will not be causing any initialization error based on the above note. But it failed with
error: initialization error: detected overlapping roots in bundle manifest with: [/var/folders/hl/7twvsdm52jx6qn3tgkh_4rzm0000gp/T/valid_roots.tar.gz /var/folders/hl/7twvsdm52jx6qn3tgkh_4rzm0000gp/T/duplicate_valid_roots.tar.gz]
Am I doing something wrong or have I understood the statement incorrectly or does the document need an update?
Structure:
valid_roots.tar.gz & duplicate_valid_roots.tar.gz
./rule
./policy
./.manifest
./policy/policy_1.rego
./rule/rule_1.rego
.manifest
{'roots':['rule/lob','policy/consumers']
OPA run command
opa run -s -a 0.0.0.0:8191 -b /var/folders/hl/7twvsdm52jx6qn3tgkh_4rzm0000gp/T/valid_roots.tar.gz -b /var/folders/hl/7twvsdm52jx6qn3tgkh_4rzm0000gp/T/duplicate_valid_roots.tar.gz

Answer 1

valid_roots.tar.gz & duplicate_valid_roots.tar.gz will be considered as 2 separate bundles and hence you see the detected overlapping roots error. If the valid_roots.tar.gz has a manifest file with the below content, it means the valid_roots.tar.gz owns these roots and no other bundle can write to those paths.
{'roots':['rule/lob','policy/consumers']
The statement you're referring in the docs is the check that is performed while reading a single bundle. If a bundle specifies roots as a/b/c and a/b, OPA cannot determine, if the bundle owns everything under a/b like a/b/foo, a/b/bar or it owns only a/b/c.