auto_correct_thru_inline_disable.rb

module AutocorrectThruDisableCuzWeSuckAtWritingGoodCode
  def autocorrect(node)
    ->(corrector) do
      until autocorrect_on.include? node&.type
        node = node&.parent
        return unless node
      end

      lines = node.source.lines
      match = lines[0].match(/^(.*?)\s*((?<!\\)#(.*))?$/)

      lines[0]  = "#{match[1]} #{build_disable match[3].to_s}\n"
      corrected = lines.join

      corrector.replace(node.loc.expression, corrected)
    end
  end

  private

  def build_disable(original)
    original = original.strip
    disables = [name]

    if original.gsub!(/^\s*rubocop\s*:\s*disable/, "")
      disables.concat original.split(",").map(&:strip).reject(&:empty?)
      disables.sort!
      disables.uniq!
    end

    "# rubocop:disable #{disables.join ', '}"
  end

  ##############################################################################

  {
    ::RuboCop::Cop::Metrics::AbcSize              => %i[def defs class module],
    ::RuboCop::Cop::Metrics::ClassLength          => %i[class],
    ::RuboCop::Cop::Metrics::CyclomaticComplexity => %i[def defs class module],
    ::RuboCop::Cop::Metrics::MethodLength         => %i[def defs],
    ::RuboCop::Cop::Metrics::ModuleLength         => %i[module],
    ::RuboCop::Cop::Metrics::ParameterLists       => %i[def defs],
    ::RuboCop::Cop::Metrics::PerceivedComplexity  => %i[def defs class module]
  }.each do |cop, autocorrect_on|
    cop.send(:include, self)
    cop.send(:define_method, :autocorrect_on, -> { autocorrect_on })
  end
end

USAGE

1. save the file to your repo
2. rubocop --require ./auto_correct_thru_inline_disable.rb --auto-correct