class Bundler::Source::Git::GitProxy

def git(command, check_errors=true)
  raise GitNotAllowedError.new(command) unless allow?
  raise GitNotInstalledError.new        unless Bundler.git_present?
  Bundler::Retry.new("git #{command}").attempts do
    out = SharedHelpers.with_clean_git_env { %x{git #{command}} }
    raise GitCommandError.new(command, path) if check_errors && !$?.success?
    out
  end
end