Merge pull request llm-d-incubation#197 from osswangxining/addKubernetesClientFlags

create AddKubernetesClientFlags func within pkg/common

Author: MikeSpreitzer

pkg/common/flags.go

@@ -0,0 +1,45 @@
+/*
+Copyright 2025 The llm-d Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package common
+
+import (
+	"github.com/spf13/pflag"
+	"k8s.io/client-go/tools/clientcmd"
+)
+
+// AddKubernetesClientFlags adds Kubernetes client configuration flags to the provided FlagSet.
+// This function allows users to specify kubeconfig file path, context, user, cluster, and namespace
+// through command line flags for Kubernetes client configuration.
+//
+// Parameters:
+//   - flags: A pflag.FlagSet to which the Kubernetes client flags will be added
+//   - loadingRules: A pointer to clientcmd.ClientConfigLoadingRules that contains rules for loading kubeconfig
+//   - overrides: A pointer to clientcmd.ConfigOverrides that contains configuration overrides
+func AddKubernetesClientFlags(flags pflag.FlagSet, loadingRules *clientcmd.ClientConfigLoadingRules, overrides *clientcmd.ConfigOverrides) {
+	if loadingRules == nil {
+		return
+	}
+	if overrides == nil {
+		return
+	}
+
+	flags.StringVar(&loadingRules.ExplicitPath, "kubeconfig", loadingRules.ExplicitPath, "Path to the kubeconfig file to use")
+	flags.StringVar(&overrides.CurrentContext, "context", overrides.CurrentContext, "The name of the kubeconfig context to use")
+	flags.StringVar(&overrides.Context.AuthInfo, "user", overrides.Context.AuthInfo, "The name of the kubeconfig user to use")
+	flags.StringVar(&overrides.Context.Cluster, "cluster", overrides.Context.Cluster, "The name of the kubeconfig cluster to use")
+	flags.StringVarP(&overrides.Context.Namespace, "namespace", "n", overrides.Context.Namespace, "The name of the Kubernetes Namespace to work in (NOT optional)")
+}