ref/refname: Add refname validation

1 files changed, 26 insertions, 0 deletions

diff --git a/ref/refname/slashes.go b/ref/refname/slashes.go
new file mode 100644
index 00000000..44d3e4ea
--- /dev/null
+++ b/ref/refname/slashes.go
@@ -0,0 +1,26 @@
+package refname
+
+import "strings"
+
+func collapseSlashes(name string) string {
+	if name == "" {
+		return ""
+	}
+
+	var builder strings.Builder
+	builder.Grow(len(name))
+
+	prev := byte('/')
+
+	for i := range len(name) {
+		ch := name[i]
+		if prev == '/' && ch == '/' {
+			continue
+		}
+
+		builder.WriteByte(ch)
+		prev = ch
+	}
+
+	return builder.String()
+}