[BUG] : Git data source URL fails to load subdirectory — entire repo root is loaded instead

[avi-biton]

Describe the Bug

The documented format for specifying a subdirectory pinned to git-ref in a git data source:
github.com/<org>/<repo>.git?ref=<reference>//<path> - See documentation
does not work correctly.
Instead of loading only <path>, Conforma loads the entire repository root.
This causes silent data loading failures when the root contains YAML files incompatible with OPA's data model.

Expected Behavior

• When using this format: github.com/release-engineering/rhtap-ec-policy.git?ref=dd1a3dd1bf2299e1da9936b89e7279b6ab443bec//data we should get only the data folder
• No merge errors

Actual Behavior

When we used github.com/release-engineering/rhtap-ec-policy.git?ref=dd1a3dd1bf2299e1da9936b89e7279b6ab443bec//data
We encountered 3 merge errors during loading:

Error: load documents: 3 errors occurred during loading:

• .github/workflows/update_rpm_repositories.yaml: merge error ...
• policy.yaml: merge error

The files in the error (.github/workflows/ and policy.yaml) are at the repository root, not inside data/. Only data/ was requested.

Workaround

Placing //path before ?ref= resolves the issue:
github.com/<org>/<repo>.git//data?ref=dd1a3dd1bf2299e1da9936b89e7279b6ab443bec
See example

Possible Solution

Either:

• Update the documentation or
• Fix the bug if its actually a bug