Automatic code quality tool for Ruby? [closed]

Question

One thing I really miss about Java is the tool support. FindBugs, Checkstyle and PMD made for a holy trinity of code quality metrics and automatic bug checking.

Is there anything that will check for simple bugs and / or style violations of Ruby code? Bonus points if I can adapt it for frameworks such as Rails so that Rails idioms are adhered to.

Answer 1

Saikuro and Flog can be good for getting a basic idea of code complexity. You can also use a tool like rcov to look at your test coverage.
There is a plugin for Rails projects that combine all those metrics into a single rake task. It is called metric_fu.

Answer 2

Projects I've found and tested recently:

• https://github.com/railsbp/rails_best_practices
  • Seems to work, and gives sensible warnings
• https://github.com/simplabs/excellent
  • Works, but quite a few false positives
• https://github.com/troessner/reek
  • I disagree with most of the warnings from this tool, but it works
• http://www.cs.umd.edu/projects/PL/druby/
  • This requires ocaml; I haven't tried it, but it looks like it might be good
• http://roodi.rubyforge.org/
  • does not appear to be Ruby 1.9 compatible
• https://github.com/gdb/ruby-static-checker
  • Is broken for me, and only catches name errors, so unit tests should cover that.
• https://github.com/michaeledgar/laser
  • Doesn't compile for me

Answer 3

I didn't see this questions when asked, but a blog post I did might help as well. In it I cover a bunch of Ruby tools and specifically cover 4 code quality tools...

1. Roodi
2. Dust
3. Flog
4. Saikuro

It might also be worth checking out Towelie and Flay

http://devver.wordpress.com/2008/10/03/ruby-tools-roundup/

Now we have combined a lot of tools into an only Ruby code quality and metrics monitoring tool called Caliper. This might fit your needs well. It tracks various quality metrics over the life of a project.

Caliper - improve your Ruby code

Answer 4

I've recently started looking for something like this for Ruby. What I've run across so far:

• Saikuro
• Roodi
• Flog

These might be places to start. Unfortunately I haven't used any of the three enough yet to offer a good opinion.

Answer 5

Code Climate is a SaaS tool that integrates through git and automatically "grades" your code. It notifies you via various channels if there a sudden drop in quality. Nice UI as well.

Answer 6

You might want to try out RuboCop. It is a Ruby code style checker based on the Ruby Style Guide. It's maintained pretty actively and it's based on standard Ruby tooling (like the ripper library). It works well with Ruby 1.9 and 2.0 and has great Emacs integration. I hope you'll find it useful!