helm_cmd_helm_get_manifest.go

package cmd

import (
	"fmt"
	"io"

	"github.com/spf13/cobra"

	"k8s.io/helm/pkg/helm"
)

var getManifestHelp = `
This command fetches the generated manifest for a given release.

A manifest is a YAML-encoded representation of the Kubernetes resources that
were generated from this release's chart(s). If a chart is dependent on other
charts, those resources will also be included in the manifest.
`

type getManifestCmd struct {
	release string
	out     io.Writer
	client  helm.Interface
}

func newGetManifestCmd(client helm.Interface, out io.Writer) *cobra.Command {
	get := &getManifestCmd{
		out:    out,
		client: client,
	}
	cmd := &cobra.Command{
		Use:   "manifest [flags] RELEASE_NAME",
		Short: "download the manifest for a named release",
		Long:  getManifestHelp,
		RunE: func(cmd *cobra.Command, args []string) error {
			if len(args) == 0 {
				return errReleaseRequired
			}
			get.release = args[0]
			if get.client == nil {
				get.client = helm.NewClient(helm.Host(tillerHost))
			}
			return get.run()
		},
	}
	return cmd
}

// getManifest implements 'helm get manifest'
func (g *getManifestCmd) run() error {
	res, err := g.client.ReleaseContent(g.release)
	if err != nil {
		return prettyError(err)
	}
	fmt.Fprintln(g.out, res.Release.Manifest)
	return nil
}