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# Some default enhancements/settings for IRB, based on
# http://wiki.rubygarden.org/Ruby/page/show/Irb/TipsAndTricks
unless defined? ETC_IRBRC_LOADED
# Require RubyGems by default.
require 'rubygems'
# Activate auto-completion.
require 'irb/completion'
# Use the simple prompt if possible.
IRB.conf[:PROMPT_MODE] = :SIMPLE if IRB.conf[:PROMPT_MODE] == :DEFAULT
# Wirble (gem install wirble)
begin
require 'wirble'
Wirble.init
Wirble.colorize
rescue LoadError
end
# Setup permanent history.
HISTFILE = "~/.irb_history"
MAXHISTSIZE = 100
begin
histfile = File::expand_path(HISTFILE)
if File::exists?(histfile)
lines = IO::readlines(histfile).collect { |line| line.chomp }
puts "Read #{lines.nitems} saved history commands from '#{histfile}'." if $VERBOSE
Readline::HISTORY.push(*lines)
else
puts "History file '#{histfile}' was empty or non-existant." if $VERBOSE
end
Kernel::at_exit do
lines = Readline::HISTORY.to_a.reverse.uniq.reverse
lines = lines[-MAXHISTSIZE, MAXHISTSIZE] if lines.nitems > MAXHISTSIZE
puts "Saving #{lines.length} history lines to '#{histfile}'." if $VERBOSE
File::open(histfile, File::WRONLY|File::CREAT|File::TRUNC) { |io| io.puts lines.join("\n") }
end
rescue => e
puts "Error when configuring permanent history: #{e}" if $VERBOSE
end
# http://ozmm.org/posts/time_in_irb.html
def time(times = 1)
require 'benchmark'
ret = nil
Benchmark.bm { |x| x.report { times.times { ret = yield } } }
ret
end
# http://github.com/rtomayko/dotfiles/blob/rtomayko/.irbrc
# list object methods
def local_methods(obj=self)
(obj.methods - obj.class.superclass.instance_methods).sort
end
def ls(obj=self)
width = `stty size 2>/dev/null`.split(/\s+/, 2).last.to_i
width = 80 if width == 0
local_methods(obj).each_slice(3) do |meths|
pattern = "%-#{width / 3}s" * meths.length
puts pattern % meths
end
end
# Just for Rails
if ENV['RAILS_ENV']
IRB.conf[:IRB_RC] = Proc.new do
Rails.logger.flush
Rails.logger.instance_variable_set("@log", STDOUT)
Rails.logger.auto_flushing = 1
end
end
ETC_IRBRC_LOADED=true
end