chore: modernize the codebase using go 1.26 (#278)

This runs:

```
go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix ./...
```

over the codebase, as this is using go 1.26, it can also use the new
new() functionallity so AsPtr and boolPtr is are needed anymore.

Signed-off-by: Miek Gieben <miek@miek.nl>

cmd/uncloud/ps_test.go

@@ -39,25 +39,25 @@ func (m *mockClusterClient) ListMachines(ctx context.Context, in *emptypb.Empty,
 
 func TestCollectContainers_NilMetadata(t *testing.T) {
 	// Setup container data
-	containerData := map[string]interface{}{
+	containerData := map[string]any{
 		"Id":   "container1",
 		"Name": "test-container",
-		"Config": map[string]interface{}{
+		"Config": map[string]any{
 			"Image": "test-image",
 		},
-		"State": map[string]interface{}{
+		"State": map[string]any{
 			"Status":     "running",
 			"StartedAt":  "2023-01-01T12:00:00Z",
 			"FinishedAt": "0001-01-01T00:00:00Z",
 		},
-		"NetworkSettings": map[string]interface{}{
-			"Networks": map[string]interface{}{},
+		"NetworkSettings": map[string]any{
+			"Networks": map[string]any{},
 		},
 	}
 	containerJSON, err := json.Marshal(containerData)
 	require.NoError(t, err)
 
-	serviceSpecJSON, err := json.Marshal(map[string]interface{}{})
+	serviceSpecJSON, err := json.Marshal(map[string]any{})
 	require.NoError(t, err)
 
 	// Setup mocks
@@ -120,28 +120,28 @@ func TestCollectContainers_NilMetadata_MultipleMachines_Error(t *testing.T) {
 	// If we have multiple machines but receive nil metadata, it should return an error as it is ambiguous
 
 	// Setup container data
-	containerData1 := map[string]interface{}{
+	containerData1 := map[string]any{
 		"Id": "container1",
 	}
 	containerJSON1, _ := json.Marshal(containerData1)
 
-	containerData2 := map[string]interface{}{
+	containerData2 := map[string]any{
 		"Id": "container2",
-		"Config": map[string]interface{}{
+		"Config": map[string]any{
 			"Image": "test-image",
 		},
-		"State": map[string]interface{}{
+		"State": map[string]any{
 			"Status":     "running",
 			"StartedAt":  "2023-01-01T12:00:00Z",
 			"FinishedAt": "0001-01-01T00:00:00Z",
 		},
-		"NetworkSettings": map[string]interface{}{
-			"Networks": map[string]interface{}{},
+		"NetworkSettings": map[string]any{
+			"Networks": map[string]any{},
 		},
 	}
 	containerJSON2, _ := json.Marshal(containerData2)
 
-	serviceSpecJSON, _ := json.Marshal(map[string]interface{}{})
+	serviceSpecJSON, _ := json.Marshal(map[string]any{})
 
 	// Setup mocks
 	mockDocker := &mockDockerClient{
@@ -210,41 +210,41 @@ func TestCollectContainers_MetadataPresent_MultipleMachines(t *testing.T) {
 	// Verify correct mapping of containers to machines when metadata is present
 
 	// Setup container data
-	containerData1 := map[string]interface{}{
+	containerData1 := map[string]any{
 		"Id":   "container1",
 		"Name": "container-1",
-		"Config": map[string]interface{}{
+		"Config": map[string]any{
 			"Image": "image-1",
 		},
-		"State": map[string]interface{}{
+		"State": map[string]any{
 			"Status":     "running",
 			"StartedAt":  "2023-01-01T12:00:00Z",
 			"FinishedAt": "0001-01-01T00:00:00Z",
 		},
-		"NetworkSettings": map[string]interface{}{
-			"Networks": map[string]interface{}{},
+		"NetworkSettings": map[string]any{
+			"Networks": map[string]any{},
 		},
 	}
 	containerJSON1, _ := json.Marshal(containerData1)
 
-	containerData2 := map[string]interface{}{
+	containerData2 := map[string]any{
 		"Id":   "container2",
 		"Name": "container-2",
-		"Config": map[string]interface{}{
+		"Config": map[string]any{
 			"Image": "image-2",
 		},
-		"State": map[string]interface{}{
+		"State": map[string]any{
 			"Status":     "running",
 			"StartedAt":  "2023-01-01T12:00:00Z",
 			"FinishedAt": "0001-01-01T00:00:00Z",
 		},
-		"NetworkSettings": map[string]interface{}{
-			"Networks": map[string]interface{}{},
+		"NetworkSettings": map[string]any{
+			"Networks": map[string]any{},
 		},
 	}
 	containerJSON2, _ := json.Marshal(containerData2)
 
-	serviceSpecJSON, _ := json.Marshal(map[string]interface{}{})
+	serviceSpecJSON, _ := json.Marshal(map[string]any{})
 
 	// Setup mocks
 	mockDocker := &mockDockerClient{
@@ -321,22 +321,22 @@ func TestCollectContainers_MetadataPresent_MultipleMachines(t *testing.T) {
 func TestCollectContainers_NilMetadata_NoMachines(t *testing.T) {
 	// Case: 1 msc with nil metadata but no machines at all
 
-	containerData := map[string]interface{}{
+	containerData := map[string]any{
 		"Id": "container1",
-		"Config": map[string]interface{}{
+		"Config": map[string]any{
 			"Image": "test-image",
 		},
-		"State": map[string]interface{}{
+		"State": map[string]any{
 			"Status":     "running",
 			"StartedAt":  "2023-01-01T12:00:00Z",
 			"FinishedAt": "0001-01-01T00:00:00Z",
 		},
-		"NetworkSettings": map[string]interface{}{
-			"Networks": map[string]interface{}{},
+		"NetworkSettings": map[string]any{
+			"Networks": map[string]any{},
 		},
 	}
 	containerJSON, _ := json.Marshal(containerData)
-	serviceSpecJSON, _ := json.Marshal(map[string]interface{}{})
+	serviceSpecJSON, _ := json.Marshal(map[string]any{})
 
 	mockDocker := &mockDockerClient{
 		listResp: &pb.ListServiceContainersResponse{
@@ -378,22 +378,22 @@ func TestCollectContainers_NilMetadata_NoMachines(t *testing.T) {
 func TestCollectContainers_MetadataPresent_NotInMapping(t *testing.T) {
 	// Case: msc with metadata that is not in the IP-to-name mapping
 
-	containerData := map[string]interface{}{
+	containerData := map[string]any{
 		"Id": "container1",
-		"Config": map[string]interface{}{
+		"Config": map[string]any{
 			"Image": "test-image",
 		},
-		"State": map[string]interface{}{
+		"State": map[string]any{
 			"Status":     "running",
 			"StartedAt":  "2023-01-01T12:00:00Z",
 			"FinishedAt": "0001-01-01T00:00:00Z",
 		},
-		"NetworkSettings": map[string]interface{}{
-			"Networks": map[string]interface{}{},
+		"NetworkSettings": map[string]any{
+			"Networks": map[string]any{},
 		},
 	}
 	containerJSON, _ := json.Marshal(containerData)
-	serviceSpecJSON, _ := json.Marshal(map[string]interface{}{})
+	serviceSpecJSON, _ := json.Marshal(map[string]any{})
 
 	mockDocker := &mockDockerClient{
 		listResp: &pb.ListServiceContainersResponse{

cmd/uncloud/service/run.go

@@ -358,8 +358,8 @@ func parseVolumeFlagValue(volume string) (api.VolumeSpec, api.VolumeMount, error
 		volumeNoCopy := false
 
 		if len(parts) == 3 {
-			opts := strings.Split(parts[2], ",")
-			for _, opt := range opts {
+			opts := strings.SplitSeq(parts[2], ",")
+			for opt := range opts {
 				switch opt {
 				case "ro", "readonly":
 					mount.ReadOnly = true

experiment/logger.go

@@ -17,57 +17,57 @@ func newIPFSLogger(l *slog.Logger) *ipfsLogger {
 	return &ipfsLogger{log: *l}
 }
 
-func (l *ipfsLogger) Debug(args ...interface{}) {
+func (l *ipfsLogger) Debug(args ...any) {
 	l.log.Debug(fmt.Sprint(args...))
 }
 
-func (l *ipfsLogger) Debugf(format string, args ...interface{}) {
+func (l *ipfsLogger) Debugf(format string, args ...any) {
 	l.log.Debug(fmt.Sprintf(format, args...))
 }
 
-func (l *ipfsLogger) Error(args ...interface{}) {
+func (l *ipfsLogger) Error(args ...any) {
 	l.log.Error(fmt.Sprint(args...))
 }
 
-func (l *ipfsLogger) Errorf(format string, args ...interface{}) {
+func (l *ipfsLogger) Errorf(format string, args ...any) {
 	l.log.Error(fmt.Sprintf(format, args...))
 }
 
-func (l *ipfsLogger) Fatal(args ...interface{}) {
+func (l *ipfsLogger) Fatal(args ...any) {
 	l.log.Error(fmt.Sprint(args...))
 	os.Exit(1)
 }
 
-func (l *ipfsLogger) Fatalf(format string, args ...interface{}) {
+func (l *ipfsLogger) Fatalf(format string, args ...any) {
 	l.log.Error(fmt.Sprintf(format, args...))
 	os.Exit(1)
 }
 
-func (l *ipfsLogger) Info(args ...interface{}) {
+func (l *ipfsLogger) Info(args ...any) {
 	l.log.Info(fmt.Sprint(args...))
 }
 
-func (l *ipfsLogger) Infof(format string, args ...interface{}) {
+func (l *ipfsLogger) Infof(format string, args ...any) {
 	l.log.Info(fmt.Sprintf(format, args...))
 }
 
-func (l *ipfsLogger) Panic(args ...interface{}) {
+func (l *ipfsLogger) Panic(args ...any) {
 	msg := fmt.Sprint(args...)
 	l.log.Error(msg)
 	panic(msg)
 }
 
-func (l *ipfsLogger) Panicf(format string, args ...interface{}) {
+func (l *ipfsLogger) Panicf(format string, args ...any) {
 	msg := fmt.Sprintf(format, args...)
 	l.log.Error(msg)
 	panic(msg)
 }
 
-func (l *ipfsLogger) Warn(args ...interface{}) {
+func (l *ipfsLogger) Warn(args ...any) {
 	l.log.Warn(fmt.Sprint(args...))
 }
 
-func (l *ipfsLogger) Warnf(format string, args ...interface{}) {
+func (l *ipfsLogger) Warnf(format string, args ...any) {
 	l.log.Warn(fmt.Sprintf(format, args...))
 }
 

internal/cli/flags.go

@@ -20,7 +20,7 @@ func ExpandCommaSeparatedValues(values []string) []string {
 
 	var expanded []string
 	for _, value := range values {
-		for _, v := range strings.Split(value, ",") {
+		for v := range strings.SplitSeq(value, ",") {
 			if v = strings.TrimSpace(v); v != "" {
 				expanded = append(expanded, v)
 			}

internal/dns/api.go

@@ -26,7 +26,7 @@ type RecordResponse struct {
 type AuthErrorResponse struct {
 	Status  int           `json:"status,omitempty"`
 	Message string        `json:"msg,omitempty"`
-	Data    authErrorData `json:"data,omitempty"`
+	Data    authErrorData `json:"data"`
 }
 
 type authErrorData struct {

internal/machine/api/proxy/director.go

@@ -107,7 +107,7 @@ func (d *Director) remoteBackend(addr string) (*RemoteBackend, error) {
 
 // FlushRemoteBackends closes all remote backend connections and removes them from the cache.
 func (d *Director) FlushRemoteBackends() {
-	d.remoteBackends.Range(func(key, value interface{}) bool {
+	d.remoteBackends.Range(func(key, value any) bool {
 		backend, ok := value.(*RemoteBackend)
 		if !ok {
 			return true

internal/machine/caddyconfig/caddyfile.go

@@ -226,12 +226,13 @@ func (g *CaddyfileGenerator) Generate(
 
 	// Append error summary as comment if there were any invalid configs.
 	if len(configErrors) > 0 {
-		errorsComment := "# Skipped invalid user-defined configs:\n"
+		var errorsComment strings.Builder
+		errorsComment.WriteString("# Skipped invalid user-defined configs:\n")
 		for _, e := range configErrors {
-			errorsComment += fmt.Sprintf("# - %s\n", e)
+			errorsComment.WriteString(fmt.Sprintf("# - %s\n", e))
 		}
 
-		caddyfile += "\n" + errorsComment
+		caddyfile += "\n" + errorsComment.String()
 	}
 
 	return caddyfileHeader + "\n" + caddyfile, nil

internal/machine/firewall/iptables_linux.go

@@ -103,7 +103,7 @@ func createIptablesChains() error {
 			}
 
 			firstRejectRuleNum := 0
-			for _, line := range strings.Split(string(out), "\n") {
+			for line := range strings.SplitSeq(string(out), "\n") {
 				fields := strings.Fields(line)
 				if len(fields) < 2 {
 					continue

internal/proxy/proxy.go

@@ -116,7 +116,7 @@ func (p *Proxy) handleConnection(ctx context.Context, localConn net.Conn) {
 	}()
 
 	// Wait for both copies to complete or context cancel.
-	for i := 0; i < 2; i++ {
+	for range 2 {
 		select {
 		case <-ctx.Done():
 			// Close connections to abort ongoing copies.

pkg/api/client.go

@@ -62,6 +62,8 @@ type VolumeClient interface {
 }
 
 // AsPtr returns a pointer to the given value. Useful for optional fields in API structs.
+//
+//go:fix inline
 func AsPtr[T any](v T) *T {
-	return &v
+	return new(v)
 }

pkg/api/config_test.go

@@ -8,11 +8,6 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-// uint64Ptr is a convenience function to create a pointer to a uint64 value
-func uint64Ptr(v uint64) *uint64 {
-	return &v
-}
-
 func TestConfigMount_GetNumericUid(t *testing.T) {
 	t.Parallel()
 
@@ -30,12 +25,12 @@ func TestConfigMount_GetNumericUid(t *testing.T) {
 		{
 			name:     "valid numeric uid",
 			uid:      "1000",
-			expected: uint64Ptr(1000),
+			expected: new(uint64(1000)),
 		},
 		{
 			name:     "zero uid",
 			uid:      "0",
-			expected: uint64Ptr(0),
+			expected: new(uint64(0)),
 		},
 		{
 			name:    "invalid non-numeric uid",
@@ -96,12 +91,12 @@ func TestConfigMount_GetNumericGid(t *testing.T) {
 		{
 			name:     "valid numeric gid",
 			gid:      "1000",
-			expected: uint64Ptr(1000),
+			expected: new(uint64(1000)),
 		},
 		{
 			name:     "zero gid",
 			gid:      "0",
-			expected: uint64Ptr(0),
+			expected: new(uint64(0)),
 		},
 		{
 			name:    "invalid non-numeric gid",

pkg/api/service.go

@@ -73,7 +73,7 @@ type ServiceSpec struct {
 	// Default is 10 seconds if not specified.
 	StopGracePeriod *time.Duration `json:",omitempty"`
 	// UpdateConfig configures how the service is updated during a deployment.
-	UpdateConfig UpdateConfig `json:",omitempty"`
+	UpdateConfig UpdateConfig
 	// Volumes is list of data volumes that can be mounted into the container.
 	Volumes []VolumeSpec
 }
@@ -348,9 +348,7 @@ func (s *ContainerSpec) Clone() ContainerSpec {
 	}
 	if s.Env != nil {
 		spec.Env = make(EnvVars, len(s.Env))
-		for k, v := range s.Env {
-			spec.Env[k] = v
-		}
+		maps.Copy(spec.Env, s.Env)
 	}
 	if s.Healthcheck != nil {
 		hc := *s.Healthcheck
@@ -380,9 +378,7 @@ func (s *ContainerSpec) Clone() ContainerSpec {
 	}
 	if s.Sysctls != nil {
 		spec.Sysctls = make(map[string]string, len(s.Sysctls))
-		for k, v := range s.Sysctls {
-			spec.Sysctls[k] = v
-		}
+		maps.Copy(spec.Sysctls, s.Sysctls)
 	}
 	if s.Resources.Ulimits != nil {
 		spec.Resources.Ulimits = maps.Clone(s.Resources.Ulimits)

pkg/api/service_test.go

@@ -9,12 +9,6 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-// boolPtr is a convenience function to create a pointer to a uint64 value
-// TODO: Make this a generic function that works for any type
-func boolPtr(b bool) *bool {
-	return &b
-}
-
 func TestServiceSpec_Validate_CaddyAndPorts(t *testing.T) {
 	tests := []struct {
 		name    string
@@ -219,7 +213,7 @@ func TestContainerSpec_Clone(t *testing.T) {
 			"BAZ": "qux",
 		},
 		Image: "nginx:latest",
-		Init:  boolPtr(true),
+		Init:  new(true),
 		LogDriver: &LogDriver{
 			Name: "json-file",
 			Options: map[string]string{

pkg/api/volume.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"fmt"
+	"maps"
 	"reflect"
 	"slices"
 	"sort"
@@ -165,18 +166,14 @@ func (v *VolumeSpec) Clone() VolumeSpec {
 			driver := *v.VolumeOptions.Driver
 			if driver.Options != nil {
 				driver.Options = make(map[string]string, len(v.VolumeOptions.Driver.Options))
-				for k, val := range v.VolumeOptions.Driver.Options {
-					driver.Options[k] = val
-				}
+				maps.Copy(driver.Options, v.VolumeOptions.Driver.Options)
 			}
 			opts.Driver = &driver
 		}
 
 		if opts.Labels != nil {
 			opts.Labels = make(map[string]string, len(v.VolumeOptions.Labels))
-			for k, val := range v.VolumeOptions.Labels {
-				opts.Labels[k] = val
-			}
+			maps.Copy(opts.Labels, v.VolumeOptions.Labels)
 		}
 
 		spec.VolumeOptions = &opts

pkg/client/compose/machines.go

@@ -11,7 +11,7 @@ const MachinesExtensionKey = "x-machines"
 type MachinesSource []string
 
 // DecodeMapstructure implements custom decoding for multiple input types
-func (m *MachinesSource) DecodeMapstructure(value interface{}) error {
+func (m *MachinesSource) DecodeMapstructure(value any) error {
 	switch v := value.(type) {
 	case *MachinesSource:
 		// Handle case where compose-go passes a pointer to an already created instance
@@ -38,7 +38,7 @@ func (m *MachinesSource) DecodeMapstructure(value interface{}) error {
 		}
 		*m = MachinesSource(machines)
 		return nil
-	case []interface{}:
+	case []any:
 		// Support interface array that may come from YAML parsing
 		machineNames := make([]string, 0, len(v))
 		for i, machine := range v {

pkg/client/compose/service.go

@@ -346,9 +346,7 @@ func dockerVolumeSpecFromCompose(serviceVolume types.ServiceVolumeConfig, volume
 func mergeLabels(labels ...types.Labels) types.Labels {
 	merged := types.Labels{}
 	for _, l := range labels {
-		for k, v := range l {
-			merged[k] = v
-		}
+		maps.Copy(merged, l)
 	}
 	return merged
 }

pkg/client/image.go

@@ -474,12 +474,10 @@ func toPushProgressEvent(jm jsonmessage.JSONMessage) *progress.Event {
 	percent := 0
 
 	if jm.Progress.Total > 0 {
-		percent = int(jm.Progress.Current * 100 / jm.Progress.Total)
+		percent = min(
 			// Cap percent at 100 to prevent index out of bounds in progress display.
 			// Docker can report Current > Total in some cases (e.g., compression).
-		if percent > 100 {
-			percent = 100
-		}
+			int(jm.Progress.Current*100/jm.Progress.Total), 100)
 	}
 
 	switch jm.Status {

pkg/client/logmerger_test.go

@@ -264,7 +264,7 @@ func TestLogMerger_UnevenStreams(t *testing.T) {
 	baseTime := time.Now()
 
 	// Stream 1 sends many entries quickly (0ms - 104ms).
-	for i := 0; i < numFastEntries; i++ {
+	for i := range numFastEntries {
 		ch1 <- testEntry(api.LogStreamStdout, baseTime.Add(time.Duration(i)*time.Millisecond), "fast")
 	}
 

test/e2e/service_test.go

@@ -1052,7 +1052,7 @@ myapp.example.com {
 		// Machine 0: vol1, vol2
 		// Machine 1: vol1, vol2
 		// Machine 2: vol1
-		for i := 0; i < 3; i++ {
+		for i := range 3 {
 			_, err := cli.CreateVolume(ctx, c.Machines[i].Name, volume.CreateOptions{Name: vol1Name})
 			require.NoError(t, err)
 			if i < 2 {