Merge branch 'allow-ee-in-backtraces' into 'master'

Include the ee/ directory in backtraces

Closes gitlab-ee#5204

See merge request gitlab-org/gitlab-ce!17664

config/initializers/backtrace_silencers.rb

-# Be sure to restart your server when you modify this file.
-
-# You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
-# Rails.backtrace_cleaner.add_silencer { |line| line =~ /my_noisy_library/ }
-
-# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code.
-# Rails.backtrace_cleaner.remove_silencers!
+Rails.backtrace_cleaner.remove_silencers!
+Rails.backtrace_cleaner.add_silencer { |line| line !~ Gitlab::APP_DIRS_PATTERN }

lib/gitlab.rb

@@ -2,6 +2,7 @@ require_dependency 'gitlab/git'
 
 module Gitlab
   COM_URL = 'https://gitlab.com'.freeze
+  APP_DIRS_PATTERN = %r{^/?(app|config|ee|lib|spec|\(\w*\))}
 
   def self.com?
     # Check `staging?` as well to keep parity with gitlab.com

spec/lib/gitlab/profiler_spec.rb

@@ -94,10 +94,12 @@ describe Gitlab::Profiler do
 
       it 'strips out the private token' do
         expect(custom_logger).to receive(:add) do |severity, _progname, message|
+          next if message.include?('spec/')
+
           expect(severity).to eq(Logger::DEBUG)
           expect(message).to include('public').and include(described_class::FILTERED_STRING)
           expect(message).not_to include(private_token)
-        end
+        end.twice
 
         custom_logger.debug("public #{private_token}")
       end