protocol: Add v0v1 server protocol and its receivepack subprotocol

1 files changed, 29 insertions, 0 deletions

diff --git a/protocol/v0v1/server/helpers.go b/protocol/v0v1/server/helpers.go
new file mode 100644
index 00000000..9a62f714
--- /dev/null
+++ b/protocol/v0v1/server/helpers.go
@@ -0,0 +1,29 @@
+package server
+
+import (
+	"slices"
+)
+
+func sortAdvertisedRefs(refs []AdvertisedRef) []AdvertisedRef {
+	out := append([]AdvertisedRef(nil), refs...)
+	slices.SortFunc(out, func(left, right AdvertisedRef) int {
+		if left.Name == "HEAD" && right.Name != "HEAD" {
+			return -1
+		}
+
+		if left.Name != "HEAD" && right.Name == "HEAD" {
+			return 1
+		}
+
+		switch {
+		case left.Name < right.Name:
+			return -1
+		case left.Name > right.Name:
+			return 1
+		default:
+			return 0
+		}
+	})
+
+	return out
+}