How to turn off warnings, 'ruby -w', in 'rake test'?

Question

I have inherited a huge Rails project with hundreds of warnings, due to other people's sloppy coding habits, none of which I can fix.

When I run an individual test suite, with ruby test/function/my_controller_test.rb, I get a clean run with no warnings. But when I run rake test, something deep in Rails's rake tasks turns on ruby -w, activating Ruby's warning system. How do I deactivate that line? I will edit the source and erase the -w if I must, but where is it?

The answer is not rake -q - that turns off rake's own spew.

Answer 1

If you want to suppress this you can add this to your shell config if you're using a POSIX-type shell:

export RUBYOPT=-W0

Or you can prepend that to any command:

RUBYOPT=-W0 ruby ...

For other shells you'll need to set that environment variable somehow.

Answer 2

I'm sure this has long been resolved, but for any future folks finding this, there is a clean way to do with with in the rakefile. Just add t.warning = false to your raketask config. So for example, a super generic one would be:

Rake::TestTask.new do |t|
  t.libs << "test"
  t.test_files = FileList['source_code/*_test.rb']
  t.verbose = true
  t.warning = false 
end

Fixing the warnings is still the best solution, but if needed, here ya go :)