DockerCLI/cli/command/stack/kubernetes/cli.go

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package kubernetes
import (
"fmt"
"os"
"path/filepath"
"github.com/docker/cli/cli/command"
composev1beta1 "github.com/docker/cli/kubernetes/client/clientset_generated/clientset/typed/compose/v1beta1"
"github.com/docker/docker/pkg/homedir"
"github.com/spf13/cobra"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
// KubeCli holds kubernetes specifics (client, namespace) with the command.Cli
type KubeCli struct {
command.Cli
kubeConfig *restclient.Config
kubeNamespace string
}
// WrapCli wraps command.Cli with kubernetes specifics
func WrapCli(dockerCli command.Cli, cmd *cobra.Command) (*KubeCli, error) {
var err error
cli := &KubeCli{
Cli: dockerCli,
kubeNamespace: "default",
}
if cmd.Flags().Changed("namespace") {
cli.kubeNamespace, err = cmd.Flags().GetString("namespace")
if err != nil {
return nil, err
}
}
kubeConfig := ""
if cmd.Flags().Changed("kubeconfig") {
kubeConfig, err = cmd.Flags().GetString("kubeconfig")
if err != nil {
return nil, err
}
}
if kubeConfig == "" {
if config := os.Getenv("KUBECONFIG"); config != "" {
kubeConfig = config
} else {
kubeConfig = filepath.Join(homedir.Get(), ".kube/config")
}
}
config, err := clientcmd.BuildConfigFromFlags("", kubeConfig)
if err != nil {
return nil, fmt.Errorf("Failed to load kubernetes configuration file '%s'", kubeConfig)
}
cli.kubeConfig = config
return cli, nil
}
func (c *KubeCli) composeClient() (*Factory, error) {
return NewFactory(c.kubeNamespace, c.kubeConfig)
}
func (c *KubeCli) stacks() (composev1beta1.StackInterface, error) {
err := APIPresent(c.kubeConfig)
if err != nil {
return nil, err
}
clientSet, err := composev1beta1.NewForConfig(c.kubeConfig)
if err != nil {
return nil, err
}
return clientSet.Stacks(c.kubeNamespace), nil
}