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# Duane Johnson's Interactive Ruby Configuration File (~/.irbrc) # # Just put this file in ~/.irbrc and your irb experience will be much better! # Include tab-completion in irb require 'irb/completion' # Modify the prompt so it looks nice and tidy. Taken from Programming Ruby 2. IRB.conf[:IRB_RC] = proc do |conf| leader = " " * conf.irb_name.length conf.prompt_i = "#{conf.irb_name} --> " conf.prompt_s = leader + ' \-" ' conf.prompt_c = leader + ' \-+ ' conf.return_format = leader + " ==> %s\n\n" puts "Welcome to interactive ruby!" end # Load and save each command in irb so we don't have to re-type stuff. Taken from ctran. # http://snipplr.com/view/1026/my-irbrc/ HISTFILE = "~/.irb_history" MAXHISTSIZE = 100 begin if defined? Readline::HISTORY histfile = File::expand_path( HISTFILE ) if File::exists?( histfile ) lines = IO::readlines( histfile ).collect {|line| line.chomp} puts "Read %d saved history commands from %s." % [ lines.nitems, histfile ] if $DEBUG || $VERBOSE Readline::HISTORY.push( *lines ) else puts "History file '%s' was empty or non-existant." % histfile if $DEBUG || $VERBOSE end Kernel::at_exit { lines = Readline::HISTORY.to_a.reverse.uniq.reverse lines = lines[ -MAXHISTSIZE, MAXHISTSIZE ] if lines.nitems > MAXHISTSIZE $stderr.puts "Saving %d history lines to %s." % [ lines.length, histfile ] if $VERBOSE || $DEBUG File::open( histfile, File::WRONLY|File::CREAT|File::TRUNC ) {|ofh| lines.each {|line| ofh.puts line } } } end end # Let's you use the "ri" command inside irb. Taken from Programming Ruby 2. def ri(*names) system(%{ri #{names.map { |name| name.to_s }.join(" ")}}) end