Last updated January 24, 2011 23:27, by rogerdpack
There is a Java-based JRuby implementation of the fast ruby debugger rdebug. See: [ JRuby Fast Debugger] Note that more recent versions of jruby (1.5) already include the gem pre-bundled, so a require 'rubygems' require 'ruby-debug' debugger is probably all you'll need to run it. For 1.6, it should "just install" via jruby -S gem install ruby-debug If you're running an older version of jruby then you'll need to follow these instructions: * Manually download the most recent ruby-debug-base-0.10.3.x-java.gem from [ debug-commons]. * Install the Gem into your JRuby Gem repository: jruby -S gem install ruby-debug-base- * '''Leave the directory or remove ruby-debug-base- from the directory''' and install ruby-debug with: jruby -S gem install --ignore-dependencies ruby-debug jruby -S gem install --ignore-dependencies ruby-debug-ide # needed only for IDEs * Install the columnize gem (unless you already have): jruby -S gem install columnize '''Note''': the <tt>--debug</tt> option used below works only with JRuby 1.1.3 and later. For older versions you need to stick with the old option, using <tt>-J-Djruby.reflection=true -J-Djruby.compile.mode=OFF</tt> instead <tt>--debug</tt>. Starting the debugger on a Rails application: cd my_rails_app jruby --debug -S rdebug script/server Starting the debugger to test a local ruby program and adding ''lib/'' to the load path: ruby --debug -S rdebug -Ilib rubyprogram.rb or you can call it programmatically within the script require 'ruby-debug' debugger just make sure to run it under a jruby with the --debug flags passed to it, or "next" will always act as if it were the "step" command. External Resources: * [ trunk jruby-debug README] * [ Debugging with ruby-debug] * [ JRuby Debugger Troubleshooting - Forum Thread]
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