Upgrade to github.com/oschwald/maxminddb-golang/v2

.github/workflows/go.yml

@@ -11,7 +11,7 @@ jobs:
   build:
     strategy:
       matrix:
-        go-version: [1.21.x, 1.22.x]
+        go-version: [1.23.x]
         # We don't test on macOS and windows as the database builds aren't
         # repeatable there for some reason. As such, tests fail. It'd
         # probably be worth looking into this at some point.

.github/workflows/golangci-lint.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.22
+          go-version: 1.23
       - uses: actions/checkout@v4
         with:
           persist-credentials: false

README.md

@@ -16,7 +16,7 @@ post,
 
 ## Copyright and License
 
-This software is Copyright (c) 2020-2024 by MaxMind, Inc.
+This software is Copyright (c) 2020-2025 by MaxMind, Inc.
 
 This is free software, licensed under the [Apache License, Version
 2.0](LICENSE-APACHE) or the [MIT License](LICENSE-MIT), at your option.

go.mod

@@ -1,19 +1,16 @@
 module github.com/maxmind/mmdbwriter
 
-go 1.21
-
-toolchain go1.22.3
+go 1.23
 
 require (
-	github.com/oschwald/maxminddb-golang v1.13.1
+	github.com/oschwald/maxminddb-golang/v2 v2.0.0-beta.2
 	github.com/stretchr/testify v1.10.0
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
-	golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc
 )
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	golang.org/x/sys v0.21.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,17 +1,15 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/oschwald/maxminddb-golang v1.13.1 h1:G3wwjdN9JmIK2o/ermkHM+98oX5fS+k5MbwsmL4MRQE=
-github.com/oschwald/maxminddb-golang v1.13.1/go.mod h1:K4pgV9N/GcK694KSTmVSDTODk4IsCNThNdTmnaBZ/F8=
+github.com/oschwald/maxminddb-golang/v2 v2.0.0-beta.2 h1:jG+FaCBv3h6GD5F+oenTfe3+0NmX8sCKjni5k3A5Dek=
+github.com/oschwald/maxminddb-golang/v2 v2.0.0-beta.2/go.mod h1:rHaQJ5SjfCdL4sqCKa3FhklRcaXga2/qyvmQuA+ZJ6M=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
 github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 go4.org/netipx v0.0.0-20231129151722-fdeea329fbba h1:0b9z3AuHCjxk0x/opv64kcgZLBseWJUpBw5I82+2U4M=
 go4.org/netipx v0.0.0-20231129151722-fdeea329fbba/go.mod h1:PLyyIXexvUFg3Owu6p/WfdlivPbZJsZdgWZlrGope/Y=
-golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc h1:O9NuF4s+E/PvMIy+9IUZB9znFwUIXEWSstNjek6VpVg=
-golang.org/x/exp v0.0.0-20240531132922-fd00a4e0eefc/go.mod h1:XtvwrStGgqGPLc4cjQfWqZHG1YFdYs6swckp8vpsjnc=
-golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws=
-golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

tree.go

@@ -11,7 +11,7 @@ import (
 	"net"
 	"time"
 
-	"github.com/oschwald/maxminddb-golang"
+	"github.com/oschwald/maxminddb-golang/v2"
 	"go4.org/netipx"
 
 	"github.com/maxmind/mmdbwriter/inserter"
@@ -217,28 +217,22 @@ func Load(path string, opts Options) (*Tree, error) {
 	dser := newDeserializer()
 
 	var networkOpts []maxminddb.NetworksOption
-	if opts.IPVersion == 6 && !opts.DisableIPv4Aliasing {
-		networkOpts = append(networkOpts, maxminddb.SkipAliasedNetworks)
+	if opts.IPVersion == 6 && opts.DisableIPv4Aliasing {
+		networkOpts = append(networkOpts, maxminddb.IncludeAliasedNetworks)
 	}
 
-	networks := db.Networks(networkOpts...)
-	for networks.Next() {
-		var network *net.IPNet
-
+	for res := range db.Networks(networkOpts...) {
 		dser.clear()
-		network, err = networks.Network(dser)
+		err := res.Decode(dser)
 		if err != nil {
 			return nil, fmt.Errorf("unmarshaling record for network: %w", err)
 		}
 
-		err = tree.Insert(network, dser.rv)
+		err = tree.Insert(netipx.PrefixIPNet(res.Prefix()), dser.rv)
 		if err != nil {
 			return nil, err
 		}
 	}
-	if err := networks.Err(); err != nil {
-		return nil, fmt.Errorf("iterating over networks: %w", err)
-	}
 	return tree, nil
 }
 

tree_test.go

@@ -5,12 +5,13 @@ import (
 	"fmt"
 	"math/big"
 	"net"
+	"net/netip"
 	"os"
 	"strings"
 	"testing"
 	"time"
 
-	"github.com/oschwald/maxminddb-golang"
+	"github.com/oschwald/maxminddb-golang/v2"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
@@ -737,20 +738,21 @@ func checkMMDB(t *testing.T, buf *bytes.Buffer, gets []testGet, name string) {
 
 		for _, get := range gets {
 			var v any
-			//nolint:forbidigo // code predates netip
-			network, ok, err := reader.LookupNetwork(net.ParseIP(get.ip), &v)
+
+			res := reader.Lookup(netip.MustParseAddr(get.ip))
+			err := res.Decode(&v)
 			require.NoError(t, err)
 
 			assert.Equal(
 				t,
 				get.expectedNetwork,
-				network.String(),
+				res.Prefix().String(),
 				"network for %s in database",
 				get.ip,
 			)
 
 			if get.expectedLookupValue == nil {
-				assert.False(t, ok, "%s is not in the database", get.ip)
+				assert.False(t, res.Found(), "%s is not in the database", get.ip)
 			} else {
 				assert.Equal(t, *get.expectedLookupValue, v, "value for %s in database", get.ip)
 			}