From 3e884f5f3d42cbc4874a04da31dde10314b0cfad Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Thu, 26 Mar 2026 09:17:14 +0000
Subject: format: Move commitgraph and packfile here

---
 format/packfile/header.go | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 format/packfile/header.go

(limited to 'format/packfile/header.go')

diff --git a/format/packfile/header.go b/format/packfile/header.go
new file mode 100644
index 00000000..bc859a55
--- /dev/null
+++ b/format/packfile/header.go
@@ -0,0 +1,9 @@
+package packfile
+
+// Signature is the 4-byte "PACK" magic at the start of pack files.
+const Signature = 0x5041434b
+
+// VersionSupported reports whether one pack version is supported.
+func VersionSupported(version uint32) bool {
+	return version == 2 || version == 3
+}
-- 
cgit v1.3.1-10-gc9f91