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Fabien Potencier 91904af902 feature #21289 [DI] Add prototype services for PSR4-based discovery and registration (nicolas-grekas)
This PR was merged into the 3.3-dev branch.

Discussion
----------

[DI] Add prototype services for PSR4-based discovery and registration

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | to be done

Talking with @dunglas, we wondered if this could be a good idea, as a more general approach to folder-based service registration as done in [DunglasActionBundle](https://github.com/dunglas/DunglasActionBundle/blob/master/DependencyInjection/DunglasActionExtension.php).

So here is the implementation.

This allows one to define a set of services as such:
```yaml
services:
    App\:
        resources: ../src/{Controller,Command} # relative to the current file as usual
        autowire: true # or any other attributes really
```

This looks for php files in the "src" folder, derivates PSR-4 class names from them, and uses `class_exists` for final discovery. The resulting services are named after the classes found this way.

The "resource" attribute can be a glob to select only a subset of the classes/files.

This approach has several advantages over [DunglasActionBundle](https://github.com/dunglas/DunglasActionBundle/blob/master/DependencyInjection/DunglasActionExtension.php):
- it is resilient to missing parent classes (see test case)
- it loads classes using the normal code path (the autoloader), thus play well with them (e.g. if one registered a special autoloader).
- it is more predictable, because it uses discovered paths as the only source of ids/classes to register - vs relying on `get_declared_classes`, which would make things context sensitive.

Fits well with current initiatives to me.

Commits
-------

03470b788e [DI] Add "psr4" service attribute for PSR4-based discovery and registration
2017-02-13 06:22:10 +01:00
.composer Drop hirak/prestissimo 2016-05-12 07:44:15 -05:00
.github Remove 3.1 from PR template 2017-02-04 19:24:41 +01:00
src/Symfony feature #21289 [DI] Add prototype services for PSR4-based discovery and registration (nicolas-grekas) 2017-02-13 06:22:10 +01:00
.editorconfig Add EditorConfig File 2012-06-16 14:08:15 +02:00
.gitignore Add appveyor.yml for C.I. on Windows 2015-08-25 23:41:37 +02:00
.php_cs.dist Merge branch '2.7' into 2.8 2017-01-21 08:53:15 -08:00
.travis.yml [Process] Deprecate not inheriting env vars + compat related settings 2017-01-31 15:22:24 +01:00
appveyor.yml Merge branch '3.1' into 3.2 2017-01-03 12:28:32 +01:00
CHANGELOG-3.0.md Merge branch '2.8' into 3.1 2016-08-05 10:37:39 +02:00
CHANGELOG-3.1.md updated CHANGELOG for 3.1.9 2017-01-12 12:43:31 -08:00
CHANGELOG-3.2.md updated CHANGELOG for 3.2.2 2017-01-12 13:36:24 -08:00
composer.json feature #21265 [DI] Implement PSR-11 (greg0ire) 2017-02-08 16:52:20 +01:00
CONTRIBUTING.md Mention the community review guide 2016-12-18 22:02:35 +01:00
CONTRIBUTORS.md update CONTRIBUTORS for 2.7.23 2017-01-12 12:02:11 -08:00
LICENSE updated LICENSE year 2017-01-02 12:30:00 -08:00
phpunit Minor fixes found while ugrading the CI 2017-01-03 16:43:07 +01:00
phpunit.xml.dist [Cache] Implement PSR-16 SimpleCache v1.0 2017-01-23 14:57:50 +01:00
README.md Merge branch '2.8' into 3.1 2016-12-23 17:43:44 +01:00
UPGRADE-3.0.md Merge branch '2.8' into 3.2 2017-01-31 22:49:23 +01:00
UPGRADE-3.1.md [Serializer] Remove AbstractObjectNormalizer::isAttributeToNormalize 2016-12-08 16:02:32 +01:00
UPGRADE-3.2.md [TwigBridge] Fix upgrade/changelog notes 2016-12-27 20:04:23 +01:00
UPGRADE-3.3.md [Process] Accept command line arrays and per-run env vars, fixing signaling and escaping 2017-02-01 23:01:35 +01:00
UPGRADE-4.0.md [Process] Accept command line arrays and per-run env vars, fixing signaling and escaping 2017-02-01 23:01:35 +01:00

README

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