# 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 # 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 ETC_IRBRC_LOADED=true end