merged branch webfactory/issue-7230/picks/cache-file-utils (PR #7753)

This PR was squashed before being merged into the master branch (closes #7753).

Discussion
----------

Mitigate dependency upon ConfigCache

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes (refactoring)
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        | todo, issue is symfony/symfony-docs#2531

Some clients use ConfigCache only for its ability to atomically write into a file.

The PR moves that code into the Filesystem component.

It's a pick off #7230.

__To-Do:__
- [ ] Update docs for the Filesystem component

Commits
-------

3158c41 Mitigate dependency upon ConfigCache

Author: fabpot

DependencyInjection/Compiler/CompilerDebugDumpPass.php

@@ -12,16 +12,20 @@
 namespace Symfony\Bundle\FrameworkBundle\DependencyInjection\Compiler;
 
 use Symfony\Component\DependencyInjection\ContainerInterface;
-use Symfony\Component\Config\ConfigCache;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\Filesystem\Filesystem;
 
 class CompilerDebugDumpPass implements CompilerPassInterface
 {
     public function process(ContainerBuilder $container)
     {
-        $cache = new ConfigCache($this->getCompilerLogFilename($container), false);
-        $cache->write(implode("\n", $container->getCompiler()->getLog()));
+        $filesystem = new Filesystem();
+        $filesystem->dumpFile(
+            $this->getCompilerLogFilename($container),
+            implode("\n", $container->getCompiler()->getLog()),
+            0666 & ~umask()
+        );
     }
 
     public static function getCompilerLogFilename(ContainerInterface $container)

DependencyInjection/Compiler/ContainerBuilderDebugDumpPass.php

@@ -14,7 +14,7 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Dumper\XmlDumper;
 use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
-use Symfony\Component\Config\ConfigCache;
+use Symfony\Component\Filesystem\Filesystem;
 
 /**
  * Dumps the ContainerBuilder to a cache file so that it can be used by
@@ -28,7 +28,11 @@ class ContainerBuilderDebugDumpPass implements CompilerPassInterface
     public function process(ContainerBuilder $container)
     {
         $dumper = new XmlDumper($container);
-        $cache = new ConfigCache($container->getParameter('debug.container.dump'), false);
-        $cache->write($dumper->dump());
+        $filesystem = new Filesystem();
+        $filesystem->dumpFile(
+            $container->getParameter('debug.container.dump'),
+            $dumper->dump(),
+            0666 & ~umask()
+        );
     }
 }