refstore/packed: Split

1 files changed, 33 insertions, 0 deletions

diff --git a/refstore/packed/new.go b/refstore/packed/new.go
new file mode 100644
index 00000000..890d42ed
--- /dev/null
+++ b/refstore/packed/new.go
@@ -0,0 +1,33 @@
+package packed
+
+import (
+	"fmt"
+	"os"
+
+	"codeberg.org/lindenii/furgit/objectid"
+)
+
+// New parses packed-refs from one repository root using the given object ID
+// algorithm.
+func New(root *os.Root, algo objectid.Algorithm) (*Store, error) {
+	if algo.Size() == 0 {
+		return nil, objectid.ErrInvalidAlgorithm
+	}
+
+	packedRefs, err := root.Open("packed-refs")
+	if err != nil {
+		return nil, fmt.Errorf("refstore/packed: open packed-refs: %w", err)
+	}
+
+	defer func() { _ = packedRefs.Close() }()
+
+	byName, ordered, err := parsePackedRefs(packedRefs, algo)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Store{
+		byName:  byName,
+		ordered: ordered,
+	}, nil
+}