istio.io/istio@v0.0.0-20240520182934-d79c90f27776/istioctl/pkg/multicluster/options.go (about)

     1  // Copyright Istio Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package multicluster
    16  
    17  import (
    18  	"k8s.io/client-go/tools/clientcmd"
    19  
    20  	"istio.io/istio/istioctl/pkg/cli"
    21  )
    22  
    23  const (
    24  	clusterNameAnnotationKey = "networking.istio.io/cluster"
    25  )
    26  
    27  // KubeOptions contains kubernetes options common to all commands.
    28  type KubeOptions struct {
    29  	Kubeconfig string
    30  	Context    string
    31  	Namespace  string
    32  }
    33  
    34  // Inherit the common kubernetes flags defined in the root package. This is a bit of a hack,
    35  // but it allows us to directly get the final values for each of these flags without needing
    36  // to pass pointers-to-flags through all of the (sub)commands.
    37  func (o *KubeOptions) prepare(ctx cli.Context) {
    38  	o.Namespace = ctx.Namespace()
    39  	if o.Namespace == "" {
    40  		o.Namespace = ctx.IstioNamespace()
    41  
    42  		configAccess := clientcmd.NewDefaultPathOptions()
    43  		configAccess.GlobalFile = o.Kubeconfig
    44  		if config, err := configAccess.GetStartingConfig(); err == nil {
    45  			if context, ok := config.Contexts[config.CurrentContext]; ok && context.Namespace != "" {
    46  				o.Namespace = context.Namespace
    47  			}
    48  		}
    49  	}
    50  }