vagrant/lib/vagrant/command/ssh_config.rb

require 'optparse'

module Vagrant
  module Command
    class SSHConfig < Base
      def execute
        options = {}

        opts = OptionParser.new do |opts|
          opts.banner = "Usage: vagrant ssh-config [vm-name] [-h name]"

          opts.separator ""

          opts.on("-h", "--host COMMAND", "Name the host for the config..") do |h|
            options[:host] = h
          end
        end

        argv = parse_options(opts)
        return if !argv

        with_target_vms(argv[0], true) do |vm|
          raise Errors::VMNotCreatedError if !vm.created?
          raise Errors::VMInaccessible if !vm.state == :inaccessible

          ssh_info  = vm.ssh.info
          variables = {
            :host_key => options[:host] || vm.name || "vagrant",
            :ssh_host => ssh_info[:host],
            :ssh_port => ssh_info[:port],
            :ssh_user => ssh_info[:username],
            :private_key_path => ssh_info[:private_key_path],
            :forward_agent => ssh_info[:forward_agent],
            :forward_x11   => ssh_info[:forward_x11]
          }

          # Render the template and output directly to STDOUT
          $stdout.puts(Util::TemplateRenderer.render("ssh_config", variables))
        end
      end
    end
  end
end