Provide an adapter to easily pass a slog.Default()

```
helmClient.Log = NewSlogAdapter(slog.Default())
```

Signed-off-by: Benoit Tigeot <benoit.tigeot@lifen.fr>

pkg/kube/logger.go

@@ -16,17 +16,33 @@ limitations under the License.
 
 package kube
 
+import "log/slog"
+
 // Logger defines a minimal logging interface compatible with slog.Logger
 type Logger interface {
 	Debug(msg string, args ...any)
 	Warn(msg string, args ...any)
 }
 
-// NopLogger is a logger that does nothing
+type SlogAdapter struct {
+	logger *slog.Logger
+}
+
 type NopLogger struct{}
 
-// Debug implements the Logger interface
 func (n NopLogger) Debug(msg string, args ...any) {}
 func (n NopLogger) Warn(msg string, args ...any)  {}
 
 var nopLogger = NopLogger{}
+
+func (a SlogAdapter) Debug(msg string, args ...any) {
+	a.logger.Debug(msg, args...)
+}
+
+func (a SlogAdapter) Warn(msg string, args ...any) {
+	a.logger.Warn(msg, args...)
+}
+
+func NewSlogAdapter(logger *slog.Logger) Logger {
+	return SlogAdapter{logger: logger}
+}

pkg/kube/ready.go

@@ -19,8 +19,6 @@ package kube // import "helm.sh/helm/v4/pkg/kube"
 import (
 	"context"
 	"fmt"
-	"io"
-	"log/slog"
 
 	appsv1 "k8s.io/api/apps/v1"
 	batchv1 "k8s.io/api/batch/v1"
@@ -65,7 +63,7 @@ func NewReadyChecker(cl kubernetes.Interface, logger Logger, opts ...ReadyChecke
 		log:    logger,
 	}
 	if c.log == nil {
-		c.log = slog.New(slog.NewTextHandler(io.Discard, nil))
+		c.log = nopLogger
 	}
 	for _, opt := range opts {
 		opt(&c)