Merge branch 'cs-remove-flog-flay' into 'master'

Remove Flog

This MR removes the flog gem and its associated rake task as we use the ABC Metrics Rubocop to accomplish the same thing. There's not really any reason to have it anymore.

The rest of this MR is kept for posterity and is no longer relevant.

-------

After a few months of flog/flay failing silently - and now a week of them failing loudly - I think it's safe to say we don't care enough about flog/flay for them to be worth keeping.

If you'd like to keep them around, speak now or forever hold your peace :)

See also #17858.

See merge request !6554

.gitlab-ci.yml

@@ -209,9 +209,6 @@ rubocop: *exec
 rake haml_lint: *exec
 rake scss_lint: *exec
 rake brakeman: *exec
-rake flog:
-  <<: *exec
-  allow_failure: yes
 rake flay:
   <<: *exec
   allow_failure: yes

Gemfile

@@ -300,7 +300,6 @@ group :development, :test do
   gem 'scss_lint', '~> 0.47.0', require: false
   gem 'haml_lint', '~> 0.18.2', require: false
   gem 'simplecov', '0.12.0', require: false
-  gem 'flog', '~> 4.3.2', require: false
   gem 'flay', '~> 2.6.1', require: false
   gem 'bundler-audit', '~> 0.5.0', require: false

Gemfile.lock

@@ -209,9 +209,6 @@ GEM
     flay (2.6.1)
       ruby_parser (~> 3.0)
       sexp_processor (~> 4.0)
-    flog (4.3.2)
-      ruby_parser (~> 3.1, > 3.1.0)
-      sexp_processor (~> 4.4)
     flowdock (0.7.1)
       httparty (~> 0.7)
       multi_json
@@ -845,7 +842,6 @@ DEPENDENCIES
   factory_girl_rails (~> 4.6.0)
   ffaker (~> 2.0.0)
   flay (~> 2.6.1)
-  flog (~> 4.3.2)
   fog-aws (~> 0.9)
   fog-azure (~> 0.0)
   fog-core (~> 1.40)

lib/tasks/flog.rake

-desc 'Code complexity analyze via flog'
-task :flog do
-  output = %x(bundle exec flog -m app/ lib/gitlab)
-  exit_code = 0
-  minimum_score = 70
-  output = output.lines
-
-  # Skip total complexity score
-  output.shift
-
-  # Skip some trash info
-  output.shift
-
-  output.each do |line|
-    score, method = line.split(" ")
-    score = score.to_i
-
-    if score > minimum_score
-      exit_code = 1
-      puts "High complexity in #{method}. Score: #{score}"
-    end
-  end
-
-  exit exit_code
-end