module RuboCop::AST::RuboCopCompatibility

def rubocop_loaded
  loaded = Gem::Version.new(RuboCop::Version::STRING)
  incompatible = INCOMPATIBLE_COPS.select do |k, _v|
    loaded < Gem::Version.new(k)
  end.values
  return if incompatible.empty?
  warn <<~WARNING
    *** WARNING – Incompatible versions of `rubocop` and `rubocop-ast`
    You may encounter issues with the following \
    Cop#{'s' if incompatible.size > 1}: #{incompatible.join(', ')}
    Please upgrade rubocop to at least v#{INCOMPATIBLE_COPS.keys.last}
  WARNING
end