chore(updater): move updater packages to pkg/updaters/<name>

pkg/updaters/mullvad/ips.go

@@ -0,0 +1,32 @@
+package mullvad
+
+import (
+	"net/netip"
+	"sort"
+)
+
+func uniqueSortedIPs(ips []netip.Addr) []netip.Addr {
+	uniqueIPs := make(map[string]struct{}, len(ips))
+	for _, ip := range ips {
+		key := ip.String()
+		uniqueIPs[key] = struct{}{}
+	}
+
+	ips = make([]netip.Addr, 0, len(uniqueIPs))
+	for key := range uniqueIPs {
+		ip, err := netip.ParseAddr(key)
+		if err != nil {
+			panic(err)
+		}
+		if ip.Is4In6() {
+			ip = netip.AddrFrom4(ip.As4())
+		}
+		ips = append(ips, ip)
+	}
+
+	sort.Slice(ips, func(i, j int) bool {
+		return ips[i].Compare(ips[j]) < 0
+	})
+
+	return ips
+}