format: Move commitgraph and packfile here

1 files changed, 16 insertions, 0 deletions

diff --git a/format/commitgraph/read/reader.go b/format/commitgraph/read/reader.go
new file mode 100644
index 00000000..d5c84a70
--- /dev/null
+++ b/format/commitgraph/read/reader.go
@@ -0,0 +1,16 @@
+package read
+
+import objectid "codeberg.org/lindenii/furgit/object/id"
+
+// Reader provides read-only access to one mmap-backed commit-graph snapshot.
+//
+// It is safe for concurrent read-only queries.
+// Values returned by Reader methods are only valid until the reader is closed
+// when explicitly documented on that method.
+type Reader struct {
+	algo        objectid.Algorithm
+	hashVersion uint8
+
+	layers []layer
+	total  uint32
+}