Use Pry everywhere

.irbrc

require 'rubygems'

# This makes pry itself and all pry gems available
$LOAD_PATH.push(*Dir["#{ENV['HOME']}/.prygems/gems/*/lib"]).uniq!

begin
  # Use Pry everywhere
  require 'pry'
rescue LoadError => e
end

if defined? Pry

  Pry.start
  exit

else

  # Do your normal IRB stuff in case Pry is not available

end

.pryrc

# We do this here as well in case pry was not started through IRB,
# but for example from rails console with pry being in the Gemfile
$LOAD_PATH.push(*Dir["#{ENV['HOME']}/.prygems/gems/*/lib"]).uniq!

# Further Pry configuration

# vim FTW
Pry.config.editor = "mvim --nofork"

# My pry is polite
Pry.hooks = { :after_session => proc { puts "bye-bye" } }

# Prompt with ruby version
Pry.prompt = [
  proc { |obj, nest_level| "#{RUBY_ENGINE}-#{RUBY_VERSION} (#{obj})#{":#{nest_level}" if nest_level > 0}> " },
  proc { |obj, nest_level| "#{RUBY_ENGINE}-#{RUBY_VERSION} (#{obj})#{":#{nest_level}" if nest_level > 0}* " }
]

# etc.

bash_or_zsh_rc.sh

alias prygem='gem install -i ~/.prygems'
alias pry='irb'

# You should install gems you want in your REPL with `prygem`:
#
# $ prygem pry pry-doc hirb coderay

shouldn't the bash / zshrc file be : irb=pry ?