ref/store/memory: Simple memory-backed ref store v0.1.175

1 files changed, 45 insertions, 0 deletions

diff --git a/ref/store/memory/ref.go b/ref/store/memory/ref.go
new file mode 100644
index 00000000..67d9268f
--- /dev/null
+++ b/ref/store/memory/ref.go
@@ -0,0 +1,45 @@
+package memory
+
+import objectid "codeberg.org/lindenii/furgit/object/id"
+
+// Because the public one includes the ref's name/identity.
+
+type storedKind uint8
+
+const (
+	storedMissing storedKind = iota
+	storedDetached
+	storedSymbolic
+)
+
+// Missing is obviously not the best design
+// but it does make it easier to operate on internally.
+// Might make a tagged union wrapper, though...
+// Or might just make a wrapper struct that has an "ok" bool.
+
+type storedRef struct {
+	kind   storedKind
+	id     objectid.ObjectID
+	target string
+	peeled *objectid.ObjectID
+}
+
+func cloneStoredRef(stored storedRef) storedRef {
+	if stored.peeled == nil {
+		return stored
+	}
+
+	peeled := *stored.peeled
+	stored.peeled = &peeled
+
+	return stored
+}
+
+func cloneRefs(refs map[string]storedRef) map[string]storedRef {
+	cloned := make(map[string]storedRef, len(refs))
+	for name, stored := range refs {
+		cloned[name] = cloneStoredRef(stored)
+	}
+
+	return cloned
+}