Composer, @PHPBelfast #2

Introduction to Composer and how to utilise it's power for creating projects with ease.

Transcript

1. h"ps://getcomposer.org  
2. Composer   Dependency  Manager  for  PHP  
3. What  Are  Dependencies?   Libraries  that  a  project  relies  on  for   itself  to  operate.  
4. What  Is  A  Dependency  Manager?   A  uAlity  to  manage  a  project’s   dependencies.   Manages  dependencies  of   dependencies  and  so  on…  
5. Hello,  Composer!   •  PHP’s  soluAon  to  Dependency  Management   •  Inspired  by  Node’s  NPM  (Node  Package  Manager)   •  Open  Source   •  PSR-­‐0   •  Symfony  community  
6. Packagist   •  hOps://packagist.org   •  Composer  packages  archive   •  Searching  libraries   •  CreaAng  new  projects   •  Requiring  libraries  
7. Installing  Composer   $ curl –sS \ https://getcomposer.org/installer | php
8. Searching  Libraries   $ composer search
9. CreaAng  a  Project   $ composer create-project
10. $ composer create-project •  Downloads  libraries  package   •  Requires  libraries  dependencies   •  Project  package  ===  library  package  
11. Requiring  Libraries   $ composer require
12. $ composer require •  Downloads  required  library  package   •  Updates  project  dependencies  
13. composer.json   •  Sets  up  Project  as  a  Composer  package   •  Defines  project  dependencies   •  Sets  dependency  constraints   •  Maps  autoloaders   •  Execute  pre/post  scripts   •  Commit  composer.json  to  your  repository  
14. composer.lock   •  Records  required  dependencies   •  Locks  dependency  versions   •  Used  for  installing  your  project  elsewhere   • Commit  composer.lock   to  your  repository!!!!!!!  
15. Installing  Dependencies   $ composer install
16. $ composer install •  Finds  dependencies  in  composer.json   •  Downloads  missing  libraries   •  Updates  libraries  set  in  composer.lock  
17. UpdaAng  Dependencies   $ composer update
18. $ composer update •  Checks  libraries  for  updates   •  Downloads  out  of  date  dependencies   •  Updates  composer.lock  
19. Using  Your  Dependencies   <?php // project root require_once(__DIR__.’/vendor/autoload.php’); That’s  it,  simples.   •  All  libraries  loaded  via   – PSR-­‐0  ||  PEAR  ||  Class  Maps  ||  SPL  
20. CreaAng  Libraries   $ composer init
21. Dependency  DefiniAons   •  Libraries  are  defined  like:    <vendor>/<package> •  SemanAc-­‐like  versioning:    1.2.3-suffix “symfony/forms”: “2.3.*”, “knplabs/knp-menu”: “1.0-RC2”
22. OpAmising  Dependencies   $  composer  dump-­‐autoload  \   -­‐-­‐opAmize  
23. $ composer dump-autoload -o •  Autoloaders  are  heavy  processes   •  Symfony,  Zend,  Laravel  etc.   – several  thousand  classes   •  Always  opAmise  when  in  producAon  
24. Debugging  Dependencies   $  composer  status   $  composer  validate   $composer  diagnose  
25. Tips  and  Caveats    
26. Install  Globally   $  mv  composer.phar  \   /usr/local/bin/composer  
27. Help  Is  On  Hand   $  composer  help  <command>  
28. Be  More  Verbose   $  composer  –vvv  <command>  
29. Minimum  Stability  Trap   “minimum-­‐stability”:  “stable”  
30. Closed  Source,  WHY?  :@   hOps://github.com/composer/saAs  
31. $talker->sayThanks(); array_walk($listeners, ‘askQuestion’);