Lord of the Code Smells in Padrino

As long as your application exists and developers will leave and new ones will take apart in your team. It's good to have some metrics about certain code smell. A code smells are part of your source code which may be the root of a design problem but are no actually bug. It's good to have some tools to be "lord of the smells" for http://www.padrinorb.com - don't let smells lower the quality of your project.

You can find code examples and how set up the metrics under http://wikimatze.de/code-coverage-tools-for-padrino/

Transcript

1. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   Lord of Code
   Smells in
   Padrino
   

   View Slide

2. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   “Musik”
   

   View Slide

3. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   Who Am I
   @wikimatze
   Running vimberlin.de
   Writing padrinobook.com
   

   View Slide

4. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   Code Smell
   any symptom in the source
   code of a program that
   possibly indicates a deeper
   problem
   

   View Slide

5. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   Tools
   simplecov: Uses Rubies
   1.9’s built-in Coverage
   library
   metric_fu: Creates churn,
   flog, flay …
   codeclimate.com: Online
   tool – hurray
   

   View Slide

6. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   Simplecov
   

   View Slide

7. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   metric_fu
   uses several other gems to
   create graphical output
   

   View Slide

8. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   Cane
   are certain code quality
   thresholds are met like line
   length, documentation
   ABC complexity
   aggregates the number of
   assignments, branches,
   and conditionals in a unit
   

   View Slide

9. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
   Cane Image
   

   View Slide

10. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Churn
    measures the change ratio
    of files
    

    View Slide

11. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Churn Image
    

    View Slide

12. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Flog
    flog score measures
    complexity
    a score of above 20 may
    need refactoring
    if it is 60 …
    

    View Slide

13. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Chaos image
    

    View Slide

14. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Flog Image
    

    View Slide

15. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Flay
    analyzes code similarities
    hell it’s just a DRY indicator
    code that is too DRY can
    become “chafe”
    

    View Slide

16. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Flay image
    

    View Slide

17. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Reek
    checks a bunch of code
    smells like control couple,
    large class, long
    parameters list, nested
    iterators, …
    

    View Slide

18. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Reek image
    

    View Slide

19. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Roodi
    Ruby Object Oriented
    Design Inferometer
    informs you about design
    issues
    

    View Slide

20. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Rood image
    

    View Slide

21. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Saikuro
    generates a list of
    cyclomatic complexity of
    each method
    

    View Slide

22. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Saikuro image
    

    View Slide

23. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Hotspot
    gathering of the flog, flay
    and reek score
    

    View Slide

24. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Hotspot image
    

    View Slide

25. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Me again
    @wikimatze
    code examples
    wikimatze.de/code-
    coverage-tools-for-padrino/
    Book preview
    padrinobook.com/book
    

    View Slide

26. Lord of Code Smells in Padrino Powered by Rabbit 2.1.3
    Redesigning padrinorb
    page
    

    View Slide