rain

package main

import (
	"os"

	"github.com/aws-cloudformation/rain/internal/cmd/rain"
)

func main() {
	os.Args = []string{
		os.Args[0],
	}

	rain.Cmd.Execute()
}

Output:

Rain is a command line tool for working with AWS CloudFormation templates and stacks

Usage:
  rain [command]

Stack commands:
  cat         Get the CloudFormation template from a running stack
  deploy      Deploy a CloudFormation stack from a local template
  logs        Show the event log for the named stack
  ls          List running CloudFormation stacks
  rm          Delete a running CloudFormation stack
  watch       Display an updating view of a CloudFormation stack

Template commands:
  build       Create CloudFormation templates
  diff        Compare CloudFormation templates
  fmt         Format CloudFormation templates
  merge       Merge two or more CloudFormation templates
  tree        Find dependencies of Resources and Outputs in a local template

Other Commands:
  console     Login to the AWS console
  help        Help about any command
  info        Show your current configuration