.irbrc

require 'open3'
require 'reline'

class Reline::LineEditor
  private def perform_completion(list, _just_show_list)
    _preposing, target, _postposing = retrieve_completion_block
    namespace = IRB.CurrentContext.io.retrieve_doc_namespace(target)
    namespace = namespace.first if namespace.is_a?(Array)
    if namespace.nil? || !('A'..'Z').include?(namespace[0])
      namespace = IRB.conf[:__MAIN__]
      namespace = namespace.class unless namespace.is_a? Class
      namespace = namespace.to_s
    end
    namespace.sub!(/\..*?$/, '')
    unless list.empty?
      selection, status = Open3.capture2("fzf", "--query", target,
                                         "--preview", "ri #{namespace}.$(echo {} | sed -e 's/^[^.]*\\.//')",
                                         stdin_data: list.join("\n"))
      insert_text(selection.rstrip.delete_prefix(target)) if status
    end
  end
end

# this just makes it autocomplete only when tab is pressed rather than as you type
IRB.conf[:USE_AUTOCOMPLETE] = false