feature #34014 [DI] made the %env(base64:...)% processor able to decode base64url (nicolas-grekas)

This PR was merged into the 4.4 branch.

Discussion
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[DI] made the `%env(base64:...)%` processor able to decode base64url

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

Commits
-------

3d12e46692 [DI] made the `%env(base64:...)%` processor able to decode base64url

src/Symfony/Component/DependencyInjection/CHANGELOG.md

@@ -14,6 +14,7 @@ CHANGELOG
  * added ability to define a static priority method for tagged service
  * added support for improved syntax to define method calls in Yaml
  * added `LazyString` for lazy computation of string values injected into services
+ * made the `%env(base64:...)%` processor able to decode base64url
 
 4.3.0
 -----

src/Symfony/Component/DependencyInjection/EnvVarProcessor.php

@@ -173,7 +173,7 @@ class EnvVarProcessor implements EnvVarProcessorInterface
         }
 
         if ('base64' === $prefix) {
-            return base64_decode($env);
+            return base64_decode(strtr($env, '-_', '+/'));
         }
 
         if ('json' === $prefix) {

src/Symfony/Component/DependencyInjection/Tests/EnvVarProcessorTest.php

@@ -231,6 +231,12 @@ class EnvVarProcessorTest extends TestCase
         });
 
         $this->assertSame('hello', $result);
+
+        $result = $processor->getEnv('base64', 'foo', function ($name) { return '/+0='; });
+        $this->assertSame("\xFF\xED", $result);
+
+        $result = $processor->getEnv('base64', 'foo', function ($name) { return '_-0='; });
+        $this->assertSame("\xFF\xED", $result);
     }
 
     public function testGetEnvTrim()