My ~/.irbrc irb settings file

.irbrc

# frozen_string_literal: true

require 'irb/completion'
require 'irb/ext/save-history'

IRB.conf[:SAVE_HISTORY] = 100_000_000
IRB.conf[:EVAL_HISTORY] = 100_000_000
IRB.conf[:PROMPT_MODE] = :SIMPLE
IRB.conf[:PROMPT][:SIMPLE][:PROMPT_C] = '|  '
# Use a proc rather than function for context to get refinements working.
IRB.conf[:CONTEXT_MODE] = 0

require 'minitest'

##
# Provide the attr Minitest needs to use assertions a la carte.
# Normally this would already be provided by Minitest::Runnable,
# but we want to play with assertions from the top level! \o/
module Minitest
  module Assertions
    attr_writer :assertions

    def assertions
      @assertions ||= 0
    end
  end
end

include Minitest::Assertions

##
# A care package to provide tidbits for those moments I miss Pry the most.
module PryCarePackage
  SYSTEM_CLEAR = %w[clear cls].freeze
  DEFAULT_ARGUMENT = Object.new.freeze
  BORING = [self, Class, Module, BasicObject, Object, Kernel,
    Minitest::Assertions].freeze

  def ls(object = DEFAULT_ARGUMENT)
    subject = object == DEFAULT_ARGUMENT ? self : object
    result = if subject.instance_of?(Class) || subject.instance_of?(Module)
      subject_methods = subject.instance_methods(false)
      subject_methods.empty? ? {} : {"#{subject}#" => subject_methods}
    else
      ancestor_methods = (subject.class.ancestors - BORING).to_h do |ancestor|
        ["#{ancestor}#", ancestor.instance_methods(false)]
      end
      ancestor_methods.reject { |_key, value| value.empty? }
    end

    class_methods = subject.public_methods(false) & subject.methods(false)
    result['self.'] = class_methods if class_methods.any?

    constants = subject.respond_to?(:constants) ? subject.constants : []
    result['Constants'] = constants if constants.any?

    result
  end

  def clear
    conf.return_format = ''
    SYSTEM_CLEAR.reduce false do |success, command|
      system [command, command] unless success
    end
  end

  def reset
    conf.return_format = ''
    puts 'irb reset.'
    exec [$PROGRAM_NAME, $PROGRAM_NAME]
  end
end

include PryCarePackage