package main

import "fmt"

type HelpCommand struct {
	// nothing yet
}

var helpCommand HelpCommand

func (x *HelpCommand) Execute(args []string) error {
	fmt.Println(`Dockviz: Visualizing Docker Data

Connecting to Docker:

Dockviz supports connecting to the Docker daemon directly.  It defaults to
'unix:///var/run/docker.sock', but respects the following as well:

* The 'DOCKER_HOST', 'DOCKER_CERT_PATH', and 'DOCKER_TLS_VERIFY' environment
  variables, as set up by boot2docker or docker-machine.
* Command line arguments (e.g. '--tlscacert'), like those that Docker itself
  supports.

Dockviz also supports receiving Docker image or container json data on standard
input: curl -s http://localhost:4243/images/json?all=1 | dockviz images --tree

Visualizing:

Dockviz can visualize both images and containers. For more information on the
options each subcommand supports, run them with the '--help' flag (e.g.
'dockviz images --help').
`)

	return nil
}

func init() {
	parser.AddCommand("help",
		"Help for dockviz.",
		"",
		&helpCommand)
}