Verantwortungsvoller Umgang mit Software-Paketen

Talk auf der SymfonyLive am 04.05.2018

Transcript

1. Verantwortungsvoller Umgang
   mit So ware-Paketen
   Ma hias Pigulla – webfactory.de
   SymfonyLive, 4. Mai 2018
   

   View Slide

2. webfactory.de/uncle-
   bob-papers
   

   View Slide

3. Release/Reuse Equivalency Principle
   (REP)
   The granule of reuse is the granule of release.
   Only components that are released through a
   tracking system can effectively be reused.
   This granule is the package.
   — Robert C. Martin
   

   View Slide

4. Release macht
   Code zum Produkt
   

   View Slide

5. Zeitliche
   Entkopplung
   

   View Slide

6. Schni stelle,
   nicht Implementierung
   

   View Slide

7. X.Y.Z
   1.2.0, 2.17.47, ...
   semver.org
   

   View Slide

8. !
   .
   "
   .
   

   View Slide

9. @trigger_error(
   'Raider heißt jetzt Twix',
   E_USER_DEPRECATED
   );
   

   View Slide

10. Schni stelle?
    

    View Slide

11. Transitive Abhängigkeiten
    

    View Slide

12. $client = $this->fetchAcmeApiClient();
    try {
    $client->addToCart(...);
    } catch (\GuzzleHttp\Exception\GuzzleException $e) {
    ...
    }
    

    View Slide

13. Strategisches
    Paketdesign
    

    View Slide

14. Common Reuse Principle (CRP)
    The classes in a package are reused together.
    If you reuse one of the classes in a package,
    you reuse them all.
    — Robert C. Martin
    

    View Slide

15. View Slide

16. Common Closure Principle (CCP)
    The classes in a package should be closed together against
    the same kinds of changes. A change that affects a package
    affects all classes in that package.
    — Robert C. Martin
    

    View Slide

17. View Slide

18. Acyclic Dependencies Principle (ADP)
    The dependency structure between packages must be a
    directed acyclic graph (DAG). That is, there must be no
    cycles in the dependency structure.
    — Robert C. Martin
    

    View Slide

19. View Slide

20. View Slide

21. View Slide

22. Tools!
    

    View Slide

23. clue/graph-composer
    github.com/clue/graph-composer
    

    View Slide

24. maglnet/ComposerRequireChecker
    github.com/maglnet/ComposerRequireChecker
    

    View Slide

25. webfactory/baton
    github.com/webfactory/baton
    baton.test.webfactory.de
    

    View Slide

26. ! "
    

    View Slide

27. View Slide