How Symfony 3.0 moves forward without letting anyone behind

Migrating from Symfony 2.3 to the newest Symfony 3.0 won't force you to rewrite all your application. Instead, you'll follow a well documented and continuous upgrade path to make a smooth transition. How is this possible? In this session, I'll tell you how the BC promise enables easy migrations. I'll also tell you about the creation of the new deprecation policy introduced in Symfony 2.7. These are the two corner stones that allow Symfony to do the split: having a wide range of stable apps and innovating at the same time.

Transcript

1. Symfony 3.0
   does the split!
   #SymfonyCon
   @nicolasgrekas
   joind.in/16479
   

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2. components
   framework
   +
   =
   

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3. One monolithic
   repo.
   +
   46 synchronized
   components
   =
   

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4. #SymfonyCon @nicolasgrekas joind.in/16479
   Symfony Lifecycle
   Release
   end of
   support
   +8 months +14 months +36 months +48 months
   end of security
   support
   end of security
   support
   end of
   support
   Standard Releases
   (2.4, 2.5, 2.6, 3.0)
   LTS Releases
   (2.3, 2.7, 2.8)
   

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5. Backward
   Compatibility
   Promise
   

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6. #SymfonyCon @nicolasgrekas joind.in/16479
   3. @internal @api
   The Backward Compatibility Promise
   http://symfony.com/bc
   

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7. #SymfonyCon @nicolasgrekas joind.in/16479
   Major
   Minor
   Patch
   

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8. #SymfonyCon @nicolasgrekas joind.in/16479
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   Semantic Versioning
   

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9. What’s new
   in Symfony 3?
   

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10. Well... Nothing!
    

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11. #SymfonyCon @nicolasgrekas joind.in/16479
    The Symfony 3.0 Architecture
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12. #SymfonyCon @nicolasgrekas joind.in/16479
    The Symfony 3.0 Architecture
    

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13. #SymfonyCon @nicolasgrekas joind.in/16479
    All new features are
    already included in
    Symfony 2.8
    What’s new in Symfony 3?
    

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14. What’s new
    in Symfony 2.8?
    

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15. #SymfonyCon @nicolasgrekas joind.in/16479
    500 new features since 2.3
    

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16. #SymfonyCon @nicolasgrekas joind.in/16479
    100+ new features since 2.7
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17. What’s new
    in Symfony 3?
    

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18. The
    Continuous
    Upgrade
    Path
    

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19. #SymfonyCon @nicolasgrekas joind.in/16479
    The Symfony Core Team Wish!
    

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20. #SymfonyCon @nicolasgrekas joind.in/16479
    Continuous Migration Path Before 2.7
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21. #SymfonyCon @nicolasgrekas joind.in/16479
    Continuous Migration Path Since 2.7
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22. #SymfonyCon @nicolasgrekas joind.in/16479
    Trigger deprecation notices at run-time
    

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23. #SymfonyCon @nicolasgrekas joind.in/16479
    Trigger deprecation notices at run-time
    

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24. #SymfonyCon @nicolasgrekas joind.in/16479
    Trigger deprecation notices at run-time
    

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25. #SymfonyCon @nicolasgrekas joind.in/16479
    Trigger deprecation notices at run-time
    

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26. #SymfonyCon @nicolasgrekas joind.in/16479
    Trigger deprecation notices at run-time
    

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27. #SymfonyCon @nicolasgrekas joind.in/16479
    Trigger deprecation notices at run-time
    

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28. #SymfonyCon @nicolasgrekas joind.in/16479
    Statically-detect deprecated code paths
    

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29. Sustainability
    of the CUP wish?
    

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30. #SymfonyCon @nicolasgrekas joind.in/16479
    Cross Versions Dependencies
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    o ~2.x|~3.0.0
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    o ~2.8|~3.0
    

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31. #SymfonyCon @nicolasgrekas joind.in/16479
    Prefer Lowest Requirements
    

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32. #SymfonyCon @nicolasgrekas joind.in/16479
    The @legacy PHPUnit Group
    

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33. #SymfonyCon @nicolasgrekas joind.in/16479
    Travis Matrix
    

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34. #SymfonyCon @nicolasgrekas joind.in/16479
    Appveyor for Windows
    

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35. #SymfonyCon @nicolasgrekas joind.in/16479
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    Sustainability of the CUP
    

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36. What about the
    Symfony ecosystem?
    

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37. #SymfonyCon @nicolasgrekas joind.in/16479
    Use the Symfony PHPUnit Bridge
    

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38. #SymfonyCon @nicolasgrekas joind.in/16479
    Use the Symfony PHPUnit Bridge
    

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39. #SymfonyCon @nicolasgrekas joind.in/16479
    Allow Symfony ~3.0 Dependencies
    

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40. #SymfonyCon @nicolasgrekas joind.in/16479
    Their turn to deprecate
    

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41. #SymfonyCon @nicolasgrekas joind.in/16479
    Their turn to deprecate
    

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42. Now your turn!
    

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43. #SymfonyCon @nicolasgrekas joind.in/16479
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    Some guidelines
    

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44. #SymfonyCon @nicolasgrekas joind.in/16479
    Use the Symfony PHPUnit Bridge
    * Since 2.8.1. The regexp is checked against the deprecation message.
    

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45. #SymfonyCon @nicolasgrekas joind.in/16479
    Some guidelines
    

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46. #SymfonyCon @nicolasgrekas joind.in/16479
    Some guidelines
    

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47. What’s new
    in Symfony 3?
    

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48. #SymfonyCon @nicolasgrekas joind.in/16479
    @trigger_error(…, E_USER_DEPRECATED);
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49. Let’s
    Keep
    Innovating!
    

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50. Merci !
    #SymfonyCon
    @nicolasgrekas
    joind.in/16479
    

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51. #SymfonyCon @nicolasgrekas joind.in/16479
    Some guidelines
    

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52. #SymfonyCon @nicolasgrekas joind.in/16479
    Some guidelines
    

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53. #SymfonyCon @nicolasgrekas joind.in/16479
    Some guidelines
    

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54. #SymfonyCon @nicolasgrekas joind.in/16479
    Some guidelines
    

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55. #SymfonyCon @nicolasgrekas joind.in/16479
    Some guidelines
    

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