From 58429d9b26b2f2b62fecab012fce0ebe36571129 Mon Sep 17 00:00:00 2001
From: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Date: Tue, 10 Nov 2015 18:34:05 +0100
Subject: [PATCH] Add method complexity check to CI

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
---
 .gitlab-ci.yml      |  7 +++++++
 Gemfile             |  1 +
 Gemfile.lock        |  4 ++++
 lib/tasks/flog.rake | 24 ++++++++++++++++++++++++
 4 files changed, 36 insertions(+)
 create mode 100644 lib/tasks/flog.rake

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cf6d28b01af..476dabe5e3d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -73,3 +73,10 @@ brakeman:
   tags:
     - ruby
     - mysql
+
+flog:
+  script:
+    - bundle exec rake flog
+  tags:
+    - ruby
+    - mysql
diff --git a/Gemfile b/Gemfile
index c73aa26bd0a..91a93215336 100644
--- a/Gemfile
+++ b/Gemfile
@@ -259,6 +259,7 @@ group :development, :test do
   gem 'rubocop',  '~> 0.28.0',  require: false
   gem 'coveralls',  '~> 0.8.2', require: false
   gem 'simplecov', '~> 0.10.0', require: false
+  gem 'flog', require: false
 
   gem 'benchmark-ips', require: false
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index dca8606806a..0fc22829cfd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -194,6 +194,9 @@ GEM
     ffi (1.9.10)
     fission (0.5.0)
       CFPropertyList (~> 2.2)
+    flog (4.3.2)
+      ruby_parser (~> 3.1, > 3.1.0)
+      sexp_processor (~> 4.4)
     flowdock (0.7.0)
       httparty (~> 0.7)
       multi_json
@@ -821,6 +824,7 @@ DEPENDENCIES
   enumerize (~> 0.7.0)
   factory_girl_rails (~> 4.3.0)
   ffaker (~> 2.0.0)
+  flog
   fog (~> 1.25.0)
   font-awesome-rails (~> 4.2)
   foreman
diff --git a/lib/tasks/flog.rake b/lib/tasks/flog.rake
new file mode 100644
index 00000000000..4cb19c0c937
--- /dev/null
+++ b/lib/tasks/flog.rake
@@ -0,0 +1,24 @@
+desc 'Code complexity analyze via flog'
+task :flog do
+  output = %x(bundle exec flog -m app/ lib/gitlab)
+  exit_code = 0
+  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 > 40
+      exit_code = 1
+      puts "High complexity in #{method}. Score: #{score}"
+    end
+  end
+
+  exit exit_code
+end