istio.io/istio@v0.0.0-20240520182934-d79c90f27776/istioctl/pkg/completion/completion.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 completion
    16  
    17  import (
    18  	"context"
    19  	"strings"
    20  
    21  	"github.com/spf13/cobra"
    22  	corev1 "k8s.io/api/core/v1"
    23  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    24  
    25  	"istio.io/istio/istioctl/pkg/cli"
    26  	"istio.io/istio/pkg/kube"
    27  )
    28  
    29  func getPodsNameInDefaultNamespace(ctx cli.Context, toComplete string) ([]string, error) {
    30  	client, err := ctx.CLIClient()
    31  	if err != nil {
    32  		return nil, err
    33  	}
    34  	ns := ctx.NamespaceOrDefault(ctx.Namespace())
    35  	podList, err := client.Kube().CoreV1().Pods(ns).List(context.Background(), metav1.ListOptions{})
    36  	if err != nil {
    37  		return nil, err
    38  	}
    39  
    40  	var podsName []string
    41  	for _, pod := range podList.Items {
    42  		if toComplete == "" || strings.HasPrefix(pod.Name, toComplete) {
    43  			podsName = append(podsName, pod.Name)
    44  		}
    45  	}
    46  
    47  	return podsName, nil
    48  }
    49  
    50  func ValidPodsNameArgs(ctx cli.Context) func(_ *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
    51  	return func(_ *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
    52  		if len(args) != 0 {
    53  			return nil, cobra.ShellCompDirectiveNoFileComp
    54  		}
    55  
    56  		podsName, err := getPodsNameInDefaultNamespace(ctx, toComplete)
    57  		if err != nil {
    58  			return nil, cobra.ShellCompDirectiveNoFileComp
    59  		}
    60  		return podsName, cobra.ShellCompDirectiveNoFileComp
    61  	}
    62  }
    63  
    64  func getServicesName(ctx cli.Context, toComplete string) ([]string, error) {
    65  	client, err := ctx.CLIClient()
    66  	if err != nil {
    67  		return nil, err
    68  	}
    69  	ns := ctx.NamespaceOrDefault(ctx.Namespace())
    70  	serviceList, err := client.Kube().CoreV1().Services(ns).List(context.Background(), metav1.ListOptions{})
    71  	if err != nil {
    72  		return nil, err
    73  	}
    74  
    75  	var serviceNameList []string
    76  	for _, service := range serviceList.Items {
    77  		if toComplete == "" || strings.HasPrefix(service.Name, toComplete) {
    78  			serviceNameList = append(serviceNameList, service.Name)
    79  		}
    80  	}
    81  
    82  	return serviceNameList, nil
    83  }
    84  
    85  func ValidServiceArgs(_ *cobra.Command, ctx cli.Context, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
    86  	if len(args) != 0 {
    87  		return nil, cobra.ShellCompDirectiveNoFileComp
    88  	}
    89  
    90  	servicesName, err := getServicesName(ctx, toComplete)
    91  	if err != nil {
    92  		return nil, cobra.ShellCompDirectiveNoFileComp
    93  	}
    94  	return servicesName, cobra.ShellCompDirectiveNoFileComp
    95  }
    96  
    97  func getNamespacesName(kubeClient kube.CLIClient, toComplete string) ([]string, error) {
    98  	ctx := context.Background()
    99  	nsList, err := getNamespaces(ctx, kubeClient)
   100  	if err != nil {
   101  		return nil, err
   102  	}
   103  
   104  	var nsNameList []string
   105  	for _, ns := range nsList {
   106  		if toComplete == "" || strings.HasPrefix(ns.Name, toComplete) {
   107  			nsNameList = append(nsNameList, ns.Name)
   108  		}
   109  	}
   110  
   111  	return nsNameList, nil
   112  }
   113  
   114  func getNamespaces(ctx context.Context, client kube.CLIClient) ([]corev1.Namespace, error) {
   115  	nslist, err := client.Kube().CoreV1().Namespaces().List(ctx, metav1.ListOptions{})
   116  	if err != nil {
   117  		return []corev1.Namespace{}, err
   118  	}
   119  	return nslist.Items, nil
   120  }
   121  
   122  func ValidNamespaceArgs(_ *cobra.Command, ctx cli.Context, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
   123  	if len(args) != 0 {
   124  		return nil, cobra.ShellCompDirectiveNoFileComp
   125  	}
   126  	client, err := ctx.CLIClient()
   127  	if err != nil {
   128  		return nil, cobra.ShellCompDirectiveNoFileComp
   129  	}
   130  	nsName, err := getNamespacesName(client, toComplete)
   131  	if err != nil {
   132  		return nil, cobra.ShellCompDirectiveNoFileComp
   133  	}
   134  	return nsName, cobra.ShellCompDirectiveNoFileComp
   135  }
   136  
   137  func ValidServiceAccountArgs(_ *cobra.Command, ctx cli.Context, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
   138  	if len(args) != 0 {
   139  		return nil, cobra.ShellCompDirectiveNoFileComp
   140  	}
   141  	client, err := ctx.CLIClient()
   142  	if err != nil {
   143  		return nil, cobra.ShellCompDirectiveNoFileComp
   144  	}
   145  	saName, err := getServiceAccountsName(client, toComplete, ctx.NamespaceOrDefault(ctx.Namespace()))
   146  	if err != nil {
   147  		return nil, cobra.ShellCompDirectiveNoFileComp
   148  	}
   149  	return saName, cobra.ShellCompDirectiveNoFileComp
   150  }
   151  
   152  func getServiceAccountsName(kubeClient kube.CLIClient, toComplete, ns string) ([]string, error) {
   153  	ctx := context.Background()
   154  	saList, err := kubeClient.Kube().CoreV1().ServiceAccounts(ns).List(ctx, metav1.ListOptions{})
   155  	if err != nil {
   156  		return nil, err
   157  	}
   158  
   159  	var saNameList []string
   160  	for _, sa := range saList.Items {
   161  		if toComplete == "" || strings.HasPrefix(sa.Name, toComplete) {
   162  			saNameList = append(saNameList, sa.Name)
   163  		}
   164  	}
   165  
   166  	return saNameList, nil
   167  }