Removes dependency on other k8s packages in featuregate pkg.

The removed packages are:

 * k8s.io/apimachinery/pkg/util/naming
 * k8s.io/klog/v2

Do note that removing naming package necessitates adding feature gate
name argument to featuregate.New().

Signed-off-by: Baek <seungtackbaek@google.com>

go.mod

@@ -1,6 +1,6 @@
 module go.etcd.io/etcd/v3
 
-go 1.22.0
+go 1.22
 
 toolchain go1.22.4
 
@@ -95,6 +95,6 @@ require (
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240520151616-dc85e6b867a5 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
+	sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6 // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect
 )

go.sum

@@ -250,7 +250,7 @@ gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
+sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6 h1:fD1pz4yfdADVNfFmcP2aBEtudwUQ1AlLnRBALr33v3s=
-sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
+sigs.k8s.io/json v0.0.0-20211020170558-c049b76a60c6/go.mod h1:p4QtZmO4uMYipTQNzagwnNoseA6OxSUutVw05NhYDRs=
 sigs.k8s.io/yaml v1.4.0 h1:Mk1wCc2gy/F0THH0TAp1QYyJNzRm2KCLy3o5ASXVI5E=
 sigs.k8s.io/yaml v1.4.0/go.mod h1:Ejl7/uTz7PSA4eKMyQCUTnhZYNmLIl+5c2lQPGR2BPY=

pkg/featuregate/feature_gate.go

@@ -12,11 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// featuregate package is copied from k8s.io/component-base@v0.30.1 to avoid any potential circular dependency between k8s and etcd.
+// Package featuregate is copied from k8s.io/component-base@v0.30.1 to avoid any potential circular dependency between k8s and etcd.
 package featuregate
 
 import (
-	"context"
 	"fmt"
 	"sort"
 	"strconv"
@@ -25,9 +24,7 @@ import (
 	"sync/atomic"
 
 	"github.com/spf13/pflag"
-
+	"go.uber.org/zap"
-	"k8s.io/apimachinery/pkg/util/naming"
-	"k8s.io/klog/v2"
 )
 
 type Feature string
@@ -128,6 +125,8 @@ type MutableFeatureGate interface {
 
 // featureGate implements FeatureGate as well as pflag.Value for flag parsing.
 type featureGate struct {
+	lg *zap.Logger
+
 	featureGateName string
 
 	special map[Feature]func(map[Feature]FeatureSpec, map[Feature]bool, bool)
@@ -165,18 +164,15 @@ func setUnsetBetaGates(known map[Feature]FeatureSpec, enabled map[Feature]bool,
 // Set, String, and Type implement pflag.Value
 var _ pflag.Value = &featureGate{}
 
-// internalPackages are packages that ignored when creating a name for featureGates. These packages are in the common
+func New(name string, lg *zap.Logger) *featureGate {
-// call chains, so they'd be unhelpful as names.
-var internalPackages = []string{"k8s.io/component-base/featuregate/feature_gate.go"}
-
-func NewFeatureGate() *featureGate {
 	known := map[Feature]FeatureSpec{}
 	for k, v := range defaultFeatures {
 		known[k] = v
 	}
 
 	f := &featureGate{
-		featureGateName: naming.GetNameFromCallsite(internalPackages...),
+		lg:              lg,
+		featureGateName: name,
 		special:         specialFeatures,
 	}
 	f.known.Store(known)
@@ -239,9 +235,9 @@ func (f *featureGate) SetFromMap(m map[string]bool) error {
 		}
 
 		if featureSpec.PreRelease == Deprecated {
-			klog.Warningf("Setting deprecated feature gate %s=%t. It will be removed in a future release.", k, v)
+			f.lg.Warn(fmt.Sprintf("Setting deprecated feature gate %s=%t. It will be removed in a future release.", k, v))
 		} else if featureSpec.PreRelease == GA {
-			klog.Warningf("Setting GA feature gate %s=%t. It will be removed in a future release.", k, v)
+			f.lg.Warn(fmt.Sprintf("Setting GA feature gate %s=%t. It will be removed in a future release.", k, v))
 		}
 	}
 
@@ -249,7 +245,7 @@ func (f *featureGate) SetFromMap(m map[string]bool) error {
 	f.known.Store(known)
 	f.enabled.Store(enabled)
 
-	klog.V(1).Infof("feature gates: %v", f.enabled)
+	f.lg.Info(fmt.Sprintf("feature gates: %v", f.enabled))
 	return nil
 }
 
@@ -319,9 +315,9 @@ func (f *featureGate) OverrideDefault(name Feature, override bool) error {
 	case spec.LockToDefault:
 		return fmt.Errorf("cannot override default: feature %q default is locked to %t", name, spec.Default)
 	case spec.PreRelease == Deprecated:
-		klog.Warningf("Overriding default of deprecated feature gate %s=%t. It will be removed in a future release.", name, override)
+		f.lg.Warn(fmt.Sprintf("Overriding default of deprecated feature gate %s=%t. It will be removed in a future release.", name, override))
 	case spec.PreRelease == GA:
-		klog.Warningf("Overriding default of GA feature gate %s=%t. It will be removed in a future release.", name, override)
+		f.lg.Warn(fmt.Sprintf("Overriding default of GA feature gate %s=%t. It will be removed in a future release.", name, override))
 	}
 
 	spec.Default = override
@@ -369,9 +365,7 @@ func (f *featureGate) AddFlag(fs *pflag.FlagSet) {
 }
 
 func (f *featureGate) AddMetrics() {
-	for feature, featureSpec := range f.GetAll() {
+	// TODO(henrybear327): implement this.
-		featuremetrics.RecordFeatureInfo(context.Background(), string(feature), string(featureSpec.PreRelease), f.Enabled(feature))
-	}
 }
 
 // KnownFeatures returns a slice of strings describing the FeatureGate's known features.

pkg/featuregate/feature_gate_test.go

@@ -21,6 +21,7 @@ import (
 
 	"github.com/spf13/pflag"
 	"github.com/stretchr/testify/assert"
+	"go.uber.org/zap/zaptest"
 )
 
 func TestFeatureGateFlag(t *testing.T) {
@@ -203,7 +204,7 @@ func TestFeatureGateFlag(t *testing.T) {
 	for i, test := range tests {
 		t.Run(test.arg, func(t *testing.T) {
 			fs := pflag.NewFlagSet("testfeaturegateflag", pflag.ContinueOnError)
-			f := NewFeatureGate()
+			f := New("test", zaptest.NewLogger(t))
 			f.Add(map[Feature]FeatureSpec{
 				testAlphaGate: {Default: false, PreRelease: Alpha},
 				testBetaGate:  {Default: false, PreRelease: Beta},
@@ -232,7 +233,7 @@ func TestFeatureGateOverride(t *testing.T) {
 	const testBetaGate Feature = "TestBeta"
 
 	// Don't parse the flag, assert defaults are used.
-	var f *featureGate = NewFeatureGate()
+	var f = New("test", zaptest.NewLogger(t))
 	f.Add(map[Feature]FeatureSpec{
 		testAlphaGate: {Default: false, PreRelease: Alpha},
 		testBetaGate:  {Default: false, PreRelease: Beta},
@@ -261,7 +262,7 @@ func TestFeatureGateFlagDefaults(t *testing.T) {
 	const testBetaGate Feature = "TestBeta"
 
 	// Don't parse the flag, assert defaults are used.
-	var f *featureGate = NewFeatureGate()
+	var f = New("test", zaptest.NewLogger(t))
 	f.Add(map[Feature]FeatureSpec{
 		testAlphaGate: {Default: false, PreRelease: Alpha},
 		testBetaGate:  {Default: true, PreRelease: Beta},
@@ -285,7 +286,7 @@ func TestFeatureGateKnownFeatures(t *testing.T) {
 	)
 
 	// Don't parse the flag, assert defaults are used.
-	var f *featureGate = NewFeatureGate()
+	var f = New("test", zaptest.NewLogger(t))
 	f.Add(map[Feature]FeatureSpec{
 		testAlphaGate:      {Default: false, PreRelease: Alpha},
 		testBetaGate:       {Default: true, PreRelease: Beta},
@@ -392,7 +393,7 @@ func TestFeatureGateSetFromMap(t *testing.T) {
 	}
 	for i, test := range tests {
 		t.Run(fmt.Sprintf("SetFromMap %s", test.name), func(t *testing.T) {
-			f := NewFeatureGate()
+			f := New("test", zaptest.NewLogger(t))
 			f.Add(map[Feature]FeatureSpec{
 				testAlphaGate:       {Default: false, PreRelease: Alpha},
 				testBetaGate:        {Default: false, PreRelease: Beta},
@@ -462,7 +463,7 @@ func TestFeatureGateString(t *testing.T) {
 	}
 	for i, test := range tests {
 		t.Run(fmt.Sprintf("SetFromMap %s", test.expect), func(t *testing.T) {
-			f := NewFeatureGate()
+			f := New("test", zaptest.NewLogger(t))
 			f.Add(featuremap)
 			f.SetFromMap(test.setmap)
 			result := f.String()
@@ -475,7 +476,7 @@ func TestFeatureGateString(t *testing.T) {
 
 func TestFeatureGateOverrideDefault(t *testing.T) {
 	t.Run("overrides take effect", func(t *testing.T) {
-		f := NewFeatureGate()
+		f := New("test", zaptest.NewLogger(t))
 		if err := f.Add(map[Feature]FeatureSpec{
 			"TestFeature1": {Default: true},
 			"TestFeature2": {Default: false},
@@ -497,7 +498,7 @@ func TestFeatureGateOverrideDefault(t *testing.T) {
 	})
 
 	t.Run("overrides are preserved across deep copies", func(t *testing.T) {
-		f := NewFeatureGate()
+		f := New("test", zaptest.NewLogger(t))
 		if err := f.Add(map[Feature]FeatureSpec{"TestFeature": {Default: false}}); err != nil {
 			t.Fatal(err)
 		}
@@ -511,7 +512,7 @@ func TestFeatureGateOverrideDefault(t *testing.T) {
 	})
 
 	t.Run("reflected in known features", func(t *testing.T) {
-		f := NewFeatureGate()
+		f := New("test", zaptest.NewLogger(t))
 		if err := f.Add(map[Feature]FeatureSpec{"TestFeature": {
 			Default:    false,
 			PreRelease: Alpha,
@@ -537,7 +538,7 @@ func TestFeatureGateOverrideDefault(t *testing.T) {
 	})
 
 	t.Run("may not change default for specs with locked defaults", func(t *testing.T) {
-		f := NewFeatureGate()
+		f := New("test", zaptest.NewLogger(t))
 		if err := f.Add(map[Feature]FeatureSpec{
 			"LockedFeature": {
 				Default:       true,
@@ -555,7 +556,7 @@ func TestFeatureGateOverrideDefault(t *testing.T) {
 	})
 
 	t.Run("does not supersede explicitly-set value", func(t *testing.T) {
-		f := NewFeatureGate()
+		f := New("test", zaptest.NewLogger(t))
 		if err := f.Add(map[Feature]FeatureSpec{"TestFeature": {Default: true}}); err != nil {
 			t.Fatal(err)
 		}
@@ -571,7 +572,7 @@ func TestFeatureGateOverrideDefault(t *testing.T) {
 	})
 
 	t.Run("prevents re-registration of feature spec after overriding default", func(t *testing.T) {
-		f := NewFeatureGate()
+		f := New("test", zaptest.NewLogger(t))
 		if err := f.Add(map[Feature]FeatureSpec{
 			"TestFeature": {
 				Default:    true,
@@ -594,14 +595,14 @@ func TestFeatureGateOverrideDefault(t *testing.T) {
 	})
 
 	t.Run("does not allow override for an unknown feature", func(t *testing.T) {
-		f := NewFeatureGate()
+		f := New("test", zaptest.NewLogger(t))
 		if err := f.OverrideDefault("TestFeature", true); err == nil {
 			t.Error("expected an error to be returned in attempt to override default for unregistered feature")
 		}
 	})
 
 	t.Run("returns error if already added to flag set", func(t *testing.T) {
-		f := NewFeatureGate()
+		f := New("test", zaptest.NewLogger(t))
 		fs := pflag.NewFlagSet("test", pflag.ContinueOnError)
 		f.AddFlag(fs)