local _VERSION = '2.0.0';

local function printUsage()
  print('upgrade usage:');
  print();
  print('\t\tupgrade');
  print('\t\tupgrade version');
  print('\t\tupgrade help');
end

local command = ...;

if command == 'version' or command == '-version' or command == '--version' then
  print('upgrade v' .. _VERSION);
  return;
end

if command == 'help' or command == '-help' or command == '--help' then
  printUsage();
  return;
end

if command ~= nil and command ~= '' then
  printUsage();
  return;
end

shell.execute('ccpm', 'upgrade');