The rpm virtual's merge cache, singleflight and two-generation retention are hard-wired to RPMRepo, so other merged index types (deb next) can't reuse them.
- add a mergedRepo interface (index + referenced files) implemented by RPMRepo
- key the merge cache by type-scoped string and serve files from both retained generations via cachedFile
- extract parallel fail-closed member fetching into a generic fetchMembers
- add tests for generation retention and per-key isolation
Reviewed-on: #147
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>
unkin-agent
0150b5ebb4