refs: support local GIT_NAMESPACE views - #2378
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Git namespaces isolate refs for server commands, but local Git commands do not use GIT_NAMESPACE as a repository view in shared object databases. Map logical refs to the selected namespace for local ref reads, writes, iteration, reflogs, and transactions. Keep upload-pack, receive-pack, and HTTP backend behavior unchanged by disabling the local view in server code. Keep hidden-ref queries independent of the local namespace view. Add tests for local ref operations and preserve server namespace behavior. Signed-off-by: John Rinehart <johnrichardrinehart@gmail.com>
A shared object database can contain objects reachable only from a namespace outside the active view, so garbage collection must retain those objects. Make maintenance enumerate namespaces while ordinary commands keep using the active namespace. Protect namespace refs when packing reachable objects and test that namespaced git gc --prune=now preserves an outside ref. Signed-off-by: John Rinehart <johnrichardrinehart@gmail.com>
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Git namespaces currently isolate refs for
git-upload-packandgit-receive-pack, but ordinary local Git commands do not useGIT_NAMESPACEas a repository view.This prevents a shared object database from providing normal local branch
semantics. For example,
GIT_NAMESPACE=bar git rev-parse refs/heads/maincannot resolve
refs/namespaces/bar/refs/heads/main.This series makes ordinary ref access namespace-aware when
GIT_NAMESPACEis set. Local commands resolve and update logical refs inside the selected
namespace, while upload-pack, receive-pack, and HTTP backend retain their
existing server behavior.
The series also makes garbage collection protect refs in every namespace.
This preserves objects shared by namespaces without requiring per-namespace
object stores or a separate garbage-collection command.
The series contains two commits:
refs: support local namespace viewsgc: protect refs in every namespaceThe tests cover local branch and ref operations, fetch, push, worktrees,
existing server namespace behavior, hidden-ref queries, and cross-namespace
garbage collection.
Checks run:
t1500-rev-parse.sht3200-branch.sht5509-fetch-push-namespaces.sht5510-fetch.sht6021-rev-list-exclude-hidden.shThis work was implemented by GPT-5.6 Luna High.