The document is a presentation by Luca Lusso about the devel module for Drupal 8, celebrating its 8th anniversary and highlighting its features and core integrations. It discusses the enhancements in the new version, including a configuration management system, new debugging tools, and support for performance monitoring through the webprofiler sub-module. Additionally, it includes a call for volunteers and job opportunities at Wellnet.

1. Devel
D8 - Release party
Luca Lusso
3 marzo 2017
Wellnet

2. Introduction

3. About me
• Luca Lusso
• Senior software architect in Wellnet
• Teacher for www.corsidrupal.it
• (co-)mantainer of Devel, Vardumper, Monolog, XHProf, ...
• @lussoluca on Twitter
• lussoluca on drupal.org
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4. Devel
Devel module turns 8!
The project begins in 2003. At that time Drupal version was 4.1
Now it has reached more that 3.500.000 downloads and it runs on more
than 200.000 websites.
The actual Drupal 8 version is 1.0-RC1
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5. Devel usage
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6. Maintainers
1 Author/Maintainers
2 ======================
3 - Moshe Weitzman <weitzman at tejasa DOT com> http://www.acquia.com
4 - Hans Salvisberg <drupal at salvisberg DOT com>
5 - Pedro Cambra https://drupal.org/user/122101/contact http://www.ymbra.com/
6 - Juan Pablo Novillo https://www.drupal.org/u/juampynr
7 - lussoluca https://www.drupal.org/u/lussoluca
8 - willzyx https://www.drupal.org/u/willzyx
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7. Devel
We are releasing the first stable version very soon!
So let’s see the new shiny features of Devel for Drupal 8.
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8. Core integrations

9. Core integrations
Drupal 8 integrates a lot of module that in Drupal 7 were contrib.
The new Devel leverages those modules to provide information and new
features to developers.
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10. Toolbar
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11. Toolbar
• Devel is now directly integrated into the core Toolbar module
• Visible links are configurable
• When in vertical mode the Toolbar shows all links
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12. Services, routing and events
Drupal 8 adds a lot of new concepts and structures that developers needs
to understand in order to build new modules.
Devel now provides report pages for services, routing and events and
many more.
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13. Manage configuration and state
Goodby Variables API, welcome Configuration Management System and
State API!
You can use Devel to inspect and edit both sistems.
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14. All features
• Cache clear
• Config editor
• Container Info
• Current route info
• Element Info
• Entity Info
• Events Info
• Execute PHP
• Field Info
• PHPinfo()
• Rebuild Menu
• Reinstall Modules
• Routes Info
• Run cron
• State editor
• Theme registry
• View Session 11

15. Switch users
As in Drupal 7, Devel provides a block that allows a quick switch
between users.
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16. Twig extensions
• devel_dump
• devel_message
• devel_breakpoint
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17. Dumpers

18. Available dumpers
• Drupal variable
• Doctrine debug
• Symfony var-dumper
• ChromePHP
• FirePHP
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19. Add a dumper
1 <?php
2 /**
3 * @DevelDumper(
4 * id = "example_dumper",
5 * label = @Translation("Example dumper"),
6 * description = @Translation("Example dumper ..."),
7 * )
8 */
9 class ExampleDumper extends DevelDumperBase {
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20. Add a dumper
1 <?php
2 interface DevelDumperInterface {
3
4 public function dump($input, $name = NULL);
5 public function export($input, $name = NULL);
6 public function exportAsRenderable($input, $name = NULL);
7 public static function checkRequirements();
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21. Webprofiler

22. Webprofiler
The old Devel query logger and memory profiler has been moved to a
sub-module: Webprofiler.
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23. Realtime data
The report pages that Devel shows about services, routing and so on,
lists all data available in a Drupal website.
Webprofiler instead collects data about the rendered page, so it is useful
to measure performance data.
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24. Available data collectors - 1
• Assets
• Blocks
• Cache
• Config
• Database
• Devel
• Events
• Extensions
• Forms
• Http
• Mail
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25. Available data collectors - 2
• PHP Config
• Performance Timing
• Request
• Routing
• Services
• State
• Theme
• Timeline
• User
• Views
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26. Integration with XHProf
Webprofiler collects high level Drupal data structure. If we need PHP
function level data about performance we need a hierarchical profiler like
XHProf (or Tideways for PHP 7.x)
The Drupal XHProf module adds a new data collector for Webprofiler.
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27. Call for volunteers
Do you want to contribute to Devel? We need help for development,
testing, documentation, UX.
What are you waiting for? Contact us!
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28. Call for developers
Wellnet is hiring!
We are looking for:
• Drupal/PHP developer
• Frontend developer
• DevOps
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29. Thank you!
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30. Questions?
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