Improve kubectl plugin

cmd/plugin/commands/exec/exec.go

@@ -0,0 +1,72 @@
+/*
+Copyright 2019 The Kubernetes 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 exec
+
+import (
+	"github.com/spf13/cobra"
+
+	"k8s.io/cli-runtime/pkg/genericclioptions"
+
+	"k8s.io/ingress-nginx/cmd/plugin/kubectl"
+	"k8s.io/ingress-nginx/cmd/plugin/request"
+	"k8s.io/ingress-nginx/cmd/plugin/util"
+)
+
+// CreateCommand creates and returns this cobra subcommand
+func CreateCommand(flags *genericclioptions.ConfigFlags) *cobra.Command {
+	opts := execFlags{}
+	var pod, deployment *string
+
+	cmd := &cobra.Command{
+		Use:   "exec",
+		Short: "Execute a command inside an ingress-nginx pod",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			util.PrintError(exec(flags, *pod, *deployment, args, opts))
+			return nil
+		},
+	}
+	pod = util.AddPodFlag(cmd)
+	deployment = util.AddDeploymentFlag(cmd)
+	cmd.Flags().BoolVarP(&opts.TTY, "tty", "t", false, "Stdin is a TTY")
+	cmd.Flags().BoolVarP(&opts.Stdin, "stdin", "i", false, "Pass stdin to the container")
+
+	return cmd
+}
+
+type execFlags struct {
+	TTY   bool
+	Stdin bool
+}
+
+func exec(flags *genericclioptions.ConfigFlags, podName string, deployment string, cmd []string, opts execFlags) error {
+	pod, err := request.ChoosePod(flags, podName, deployment)
+	if err != nil {
+		return err
+	}
+
+	args := []string{"exec"}
+	if opts.TTY {
+		args = append(args, "-t")
+	}
+	if opts.Stdin {
+		args = append(args, "-i")
+	}
+
+	args = append(args, []string{"-n", pod.Namespace, pod.Name, "--"}...)
+	args = append(args, cmd...)
+	return kubectl.Exec(flags, args)
+}