introduce continuous integration into the development process. choose integrity since it’s light-weighted, easy to configure, good support for git and works for ourselves on our own install.

1. Continuous Integration
For Rails Project
IN-SRC Studio
Louie Zhao

2. Continuous Integration
• A software development practice
where members of a team integrate
their work frequently
• Each integration is verified by an
automated build (including test)
• significantly reduced integration
problems

3. Firefox Tinderbox
http://tinderbox.mozilla.org/showbuilds.cgi?tree=Firefox

4. Continuous Integration
• Maintain a code repository
• Automate the build
• Every commit should be built
• Make the build self-testing
• Keep the build fast
• Everyone can see the results

5. CI Solutions for Rails
• CruiseControl.rb http://cruisecontrolrb.thoughtworks.com/
• Cerberus http://cerberus.rubyforge.org/
• Run Code Run http://runcoderun.com/
• Integrity http://integrityapp.com/

6. Integrity
• light-weighted
• easy to configure
• good support for git
• works on our own install.

7. Integrity
Production
developer Git Push
git
Build Notification
developer repository
developer
developer CI Server
Email Notification

8. Integrity - Installation
• Server Configuration
• SUSE Linux
• Apache
• Passenger
• MySQL 5.x

9. Integrity - Build
• The building environment is almost
identical to your development
environment
• Standalone CI server
• DB Server
• rake ci WITH_PACKAGE_TEST=1

10. Integrity - Installation
http://www.in-src.com/continuous_integration_for_rails_project
• $ gem install --passenger integrity
• $ integrity install [integrity-diretory]
• $ integrity migrate_db config.yml

11. Integrity - Source
• local git repository
• /var/git/[project-name].git
• remote git repository
• ssh://[user]@[hostname]/var/git/[project-name].git

12. Integrity - Git Hook Up
• git post-receive
• POST_RECEIVE_URL
• Daemons

13. Integrity - Email
Notification

14. Integrity - Build

15. Integrity - Build

16. Integrity - Build

17. Integrity
• Trouble Shooting
• http://www.in-src.com/
continuous_integration_for_rails_project

18. Metric Fu
• a set of rake tasks
• Saikuro, Flog, Flay, Rcov, Reek, Roodi
• sudo gem install jscruggs-metric_fu
• rake metrics:all
• generate metrics reports

19. Metric Fu - Configuration

20. Metric Fu

21. Rcov

22. Rcov

23. Churn

24. Flay

25. Flog
The higher
the score, the
harder it is to
test

26. Flog
Code Seen as flog flog report
class Test class Test Test#blah: (11.2)
def blah def blah # 11.2 = 6.0: eval
a = eval "1+1" a = eval "1+1" # 1.2 + 6.0 + 1.2: branch
if a == 2 then if a == 2 then # 1.2 + 1.2 + 0.4 + 1.2: ==
puts "yay" puts "yay" # 1.2 1.2: puts
end end 1.2: assignment
end end 0.4: lit_fixnum
end end

27. Reek
• detects common code smells
might be hard to read,
• Class Variable maintain or evolve,
• Control Couple rather than things
that are specifically
• Data Clump wrong
• Duplication
• Feature Envy
• Large Class
• Long Method
• Long Parameter List
• Nested Iterators
• Simulated Polymorphism
• Uncommunicative Name
• Utility Function

28. Reek
Duplication Feature Envy
def double_thing() class Cart
@other.thing + @other.thing def price
end @item.price + @item.tax
end
end
def double_thing() class Cart
thing = @other.thing def price
thing + thing @item.price_with_tax
end end
end
class Item
def price_with_tax
price + tax
end
end

29. Reek

30. Roodi

31. Roodi
• warns you about design issues
• AssignmentInConditionalCheck
• CaseMissingElseCheck
• ClassLineCountCheck
• ClassNameCheck
• CyclomaticComplexityBlockCheck
• CyclomaticComplexityMethodCheck
• EmptyRescueBodyCheck
• ForLoopCheck
• MethodLineCountCheck
• MethodNameCheck
• ModuleLineCountCheck
• ModuleNameCheck
• ParameterNumberCheck

32. Stats

33. Thank You!
louiezhao@in-src.com