Added Versions

version/version.go

@@ -55,6 +55,21 @@ func (v Version) LessThan(other Version) bool {
 	return Compare(v, other) < 0
 }
 
+// Versions is a sort.Sortable slice of Version
+type Versions []Version
+
+func (vs Versions) Len() int {
+	return len(vs)
+}
+
+func (vs Versions) Less(i, j int) bool {
+	return vs[i].LessThan(vs[j])
+}
+
+func (vs Versions) Swap(i, j int) {
+	vs[i], vs[j] = vs[j], vs[i]
+}
+
 var alphanumPattern = regexp.MustCompile("([a-zA-Z]+)|([0-9]+)|(~)")
 
 // rpmvercmp implements https://github.com/rpm-software-management/rpm/blob/master/lib/rpmvercmp.c