feat: support kubeconfig directly

client/client.go

@@ -52,7 +52,7 @@ func GetAllServerResources(ketalloptions *options.KetallOptions) (runtime.Object
 	}
 
 	start := time.Now()
-	response, err := fetchResourcesBulk(ketalloptions.Namespace, ketalloptions.Selector, ketalloptions.FieldSelector, ketalloptions.GenericCliFlags, grs...)
+	response, err := fetchResourcesBulk(ketalloptions.Namespace, ketalloptions.Selector, ketalloptions.FieldSelector, ketalloptions.Flags, grs...)
 	klog.V(2).Infof("Initial fetchResourcesBulk done (%s)", duration.HumanDuration(time.Since(start)))
 	if err == nil {
 		return response, nil
@@ -71,7 +71,7 @@ func getExclusions(exclusions []string, selector, fieldSelector string) []string
 }
 
 func groupResources(ketalloptions *options.KetallOptions) ([]groupResource, error) {
-	client, err := ketalloptions.GenericCliFlags.ToDiscoveryClient()
+	client, err := ketalloptions.Flags.ToDiscoveryClient()
 	if err != nil {
 		return nil, errors.Wrap(err, "discovery client")
 	}
@@ -187,7 +187,7 @@ func fetchResourcesIncremental(ctx context.Context, ketalloptions *options.Ketal
 				return // context cancelled
 			}
 			defer sem.Release(1)
-			obj, err := fetchResourcesBulk(ketalloptions.Namespace, ketalloptions.Selector, ketalloptions.FieldSelector, ketalloptions.GenericCliFlags, gr)
+			obj, err := fetchResourcesBulk(ketalloptions.Namespace, ketalloptions.Selector, ketalloptions.FieldSelector, ketalloptions.Flags, gr)
 			if err != nil {
 				klog.Warningf("Cannot fetch: %v", err)
 				return

go.mod

@@ -9,6 +9,7 @@ require (
 	k8s.io/api v0.28.0
 	k8s.io/apimachinery v0.28.0
 	k8s.io/cli-runtime v0.28.0
+	k8s.io/client-go v0.28.0
 	k8s.io/klog/v2 v2.100.1
 )
 
@@ -57,7 +58,6 @@ require (
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/client-go v0.28.0 // indirect
 	k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9 // indirect
 	k8s.io/utils v0.0.0-20230406110748-d93618cff8a2 // indirect
 	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect

options/options.go

@@ -18,10 +18,10 @@ package options
 
 import (
 	"k8s.io/cli-runtime/pkg/genericclioptions"
+	"k8s.io/client-go/rest"
 )
 
 type KetallOptions struct {
-	GenericCliFlags *genericclioptions.ConfigFlags
 	UseCache        bool     `json:"useCache,omitempty"`
 	AllowIncomplete bool     `json:"allowIncomplete,omitempty"`
 	Scope           string   `json:"scope,omitempty"`
@@ -32,11 +32,30 @@ type KetallOptions struct {
 	Namespace       string   `json:"namespace.omitempty"`
 	Exclusions      []string `json:"exclusions,omitempty"` // Exclude resources by name or kind or shortname
 	Kind            string   `json:"kind,omitempty"`       // Limits results on a specific kind
+
+	Flags *KetAllConfigFlags
+}
+
+// KetAllConfigFlags is a wrapper around genericclioptions.ConfigFlags
+// to support kubeconfig directly without needing the kubeconfig path.
+type KetAllConfigFlags struct {
+	*genericclioptions.ConfigFlags
+	KubeConfig *rest.Config `json:"kubeConfig,omitempty"`
+}
+
+func (t *KetAllConfigFlags) RawConfig() (*rest.Config, error) {
+	if t.KubeConfig != nil {
+		return t.KubeConfig, nil
+	}
+
+	return t.ConfigFlags.ToRESTConfig()
 }
 
 func NewDefaultCmdOptions() *KetallOptions {
 	return &KetallOptions{
-		GenericCliFlags: genericclioptions.NewConfigFlags(true),
+		Flags: &KetAllConfigFlags{
+			ConfigFlags: genericclioptions.NewConfigFlags(true),
+		},
 	}
 }