objectstore/packed: Add initial pack reading support

1 files changed, 19 insertions, 0 deletions

diff --git a/objectstore/packed/read_header.go b/objectstore/packed/read_header.go
new file mode 100644
index 00000000..c72188b9
--- /dev/null
+++ b/objectstore/packed/read_header.go
@@ -0,0 +1,19 @@
+package packed
+
+import (
+	"codeberg.org/lindenii/furgit/objectid"
+	"codeberg.org/lindenii/furgit/objecttype"
+)
+
+// ReadHeader reads an object's type and declared content size.
+func (store *Store) ReadHeader(id objectid.ObjectID) (objecttype.Type, int64, error) {
+	loc, err := store.lookup(id)
+	if err != nil {
+		return objecttype.TypeInvalid, 0, err
+	}
+	plan, err := store.deltaPlanFor(loc)
+	if err != nil {
+		return objecttype.TypeInvalid, 0, err
+	}
+	return plan.baseType, plan.declaredSize, nil
+}