From 9d08dc994d51298e2d8e75d8ed4ee477312ec53a Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Sat, 7 Mar 2026 15:08:14 +0800
Subject: ref/refname: Add refname validation

---
 ref/refname/root_syntax.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 ref/refname/root_syntax.go

(limited to 'ref/refname/root_syntax.go')

diff --git a/ref/refname/root_syntax.go b/ref/refname/root_syntax.go
new file mode 100644
index 00000000..97a15cb9
--- /dev/null
+++ b/ref/refname/root_syntax.go
@@ -0,0 +1,13 @@
+package refname
+
+// IsRootSyntax reports whether name matches Git's all-caps root-ref syntax.
+func IsRootSyntax(name string) bool {
+	for i := range len(name) {
+		ch := name[i]
+		if (ch < 'A' || ch > 'Z') && ch != '-' && ch != '_' {
+			return false
+		}
+	}
+
+	return true
+}
-- 
cgit v1.3.1-10-gc9f91