fix(pkg): errorlint linter

#### Description

errorlint linter in pkg/cmd

Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>

pkg/cmd/lint.go

@@ -59,7 +59,7 @@ func newLintCmd(out io.Writer) *cobra.Command {
 			if kubeVersion != "" {
 				parsedKubeVersion, err := common.ParseKubeVersion(kubeVersion)
 				if err != nil {
-					return fmt.Errorf("invalid kube version '%s': %s", kubeVersion, err)
+					return fmt.Errorf("invalid kube version '%s': %w", kubeVersion, err)
 				}
 				client.KubeVersion = parsedKubeVersion
 			}

pkg/cmd/plugin_uninstall.go

@@ -70,7 +70,7 @@ func (o *pluginUninstallOptions) run(out io.Writer) error {
 	for _, name := range o.names {
 		if found := findPlugin(plugins, name); found != nil {
 			if err := uninstallPlugin(found); err != nil {
-				errorPlugins = append(errorPlugins, fmt.Errorf("failed to uninstall plugin %s, got error (%v)", name, err))
+				errorPlugins = append(errorPlugins, fmt.Errorf("failed to uninstall plugin %s, got error (%w)", name, err))
 			} else {
 				fmt.Fprintf(out, "Uninstalled plugin: %s\n", name)
 			}

pkg/cmd/plugin_update.go

@@ -71,7 +71,7 @@ func (o *pluginUpdateOptions) run(out io.Writer) error {
 	for _, name := range o.names {
 		if found := findPlugin(plugins, name); found != nil {
 			if err := updatePlugin(found); err != nil {
-				errorPlugins = append(errorPlugins, fmt.Errorf("failed to update plugin %s, got error (%v)", name, err))
+				errorPlugins = append(errorPlugins, fmt.Errorf("failed to update plugin %s, got error (%w)", name, err))
 			} else {
 				fmt.Fprintf(out, "Updated plugin: %s\n", name)
 			}

pkg/registry/transport.go

@@ -18,6 +18,7 @@ package registry
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"log/slog"
@@ -137,7 +138,7 @@ func logResponseBody(resp *http.Response) string {
 		Closer: body,
 	}
 	// read the body up to limit+1 to check if the body exceeds the limit
-	if _, err := io.CopyN(buf, body, payloadSizeLimit+1); err != nil && err != io.EOF {
+	if _, err := io.CopyN(buf, body, payloadSizeLimit+1); err != nil && !errors.Is(err, io.EOF) {
 		return fmt.Sprintf("   Error reading response body: %v", err)
 	}
 

pkg/repo/v1/index.go

@@ -405,7 +405,8 @@ func jsonOrYamlUnmarshal(b []byte, i interface{}) error {
 // And repository indexes may be generated by older/non-compliant software, which doesn't
 // conform to all validations.
 func ignoreSkippableChartValidationError(err error) error {
-	verr, ok := err.(chart.ValidationError)
+	var verr chart.ValidationError
+	ok := errors.As(err, &verr)
 	if !ok {
 		return err
 	}