update

snapshot.go

@@ -0,0 +1,20 @@
+package main
+
+import "strings"
+
+type Snapshot string
+
+func (s Snapshot) Path() string {
+	s2 := strings.Split(string(s), `@`)
+	return s2[0]
+}
+
+func (s Snapshot) Name() string {
+	s2 := strings.Split(string(s), `@`)
+	return s2[1]
+}
+
+func (s Snapshot) Append(path string) Snapshot {
+	s2 := strings.Split(string(s), `@`)
+	return Snapshot(s2[0] + "/" + path + "@" + s2[1])
+}