compose/cli/cmd/context/create_kube.go

// +build kube

/*
   Copyright 2020 Docker Compose CLI 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 context

import (
	"context"

	"github.com/pkg/errors"
	"github.com/spf13/cobra"

	"github.com/docker/compose-cli/api/context/store"
	"github.com/docker/compose-cli/api/errdefs"
	"github.com/docker/compose-cli/kube"
)

func init() {
	extraCommands = append(extraCommands, createKubeCommand)
	extraHelp = append(extraHelp, `
Create a Kubernetes context:
$ docker context create kubernetes CONTEXT [flags]
(see docker context create kubernetes --help)
`)
}

func createKubeCommand() *cobra.Command {
	var opts kube.ContextParams
	cmd := &cobra.Command{
		Use:   "kubernetes CONTEXT [flags]",
		Short: "Create context for a Kubernetes Cluster",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			opts.Name = args[0]

			if opts.Endpoint != "" {
				opts.FromEnvironment = false
			}
			return runCreateKube(cmd.Context(), args[0], opts)
		},
	}

	addDescriptionFlag(cmd, &opts.Description)
	cmd.Flags().StringVar(&opts.Endpoint, "endpoint", "", "The endpoint of the Kubernetes manager")
	cmd.Flags().BoolVar(&opts.FromEnvironment, "from-env", true, "Get endpoint and creds from env vars")
	return cmd
}

func runCreateKube(ctx context.Context, contextName string, opts kube.ContextParams) error {
	if contextExists(ctx, contextName) {
		return errors.Wrapf(errdefs.ErrAlreadyExists, "context %q", contextName)
	}

	contextData, description := createContextData(opts)
	return createDockerContext(ctx, contextName, store.KubeContextType, description, contextData)
}

func createContextData(opts kube.ContextParams) (interface{}, string) {
	return store.KubeContext{
		Endpoint:        opts.Endpoint,
		FromEnvironment: opts.FromEnvironment,
	}, opts.Description
}