Add monolog:channels config option to create arbitrary channels, fixes #39

Just define them as:

monolog:
    channels: ["foo", "bar"]

And then use in a controller for example as $this->get("monolog.logger.foo");

Author: Seldaek

DependencyInjection/Compiler/LoggerChannelPass.php

@@ -32,6 +32,7 @@ public function process(ContainerBuilder $container)
             return;
         }
 
+        // create channels necessary for the handlers
         foreach ($container->findTaggedServiceIds('monolog.logger') as $id => $tags) {
             foreach ($tags as $tag) {
                 if (empty($tag['channel']) || 'app' === $tag['channel']) {
@@ -60,8 +61,15 @@ public function process(ContainerBuilder $container)
             }
         }
 
-        $handlersToChannels = $container->getParameter('monolog.handlers_to_channels');
+        // create additional channels
+        foreach ($container->getParameter('monolog.additional_channels') as $chan) {
+            $loggerId = sprintf('monolog.logger.%s', $chan);
+            $this->createLogger($chan, $loggerId, $container);
+        }
+        $container->getParameterBag()->remove('monolog.additional_channels');
 
+        // wire handlers to channels
+        $handlersToChannels = $container->getParameter('monolog.handlers_to_channels');
         foreach ($handlersToChannels as $handler => $channels) {
             foreach ($this->processChannels($channels) as $channel) {
                 try {

DependencyInjection/Configuration.php

@@ -174,6 +174,10 @@ public function getConfigTreeBuilder()
         $rootNode
             ->fixXmlConfig('handler')
             ->children()
+                ->arrayNode('channels')
+                    ->canBeUnset()
+                    ->prototype('scalar')->end()
+                ->end()
                 ->arrayNode('handlers')
                     ->canBeUnset()
                     ->useAttributeAsKey('name')

DependencyInjection/MonologExtension.php

@@ -86,6 +86,8 @@ public function load(array $configs, ContainerBuilder $container)
                 'Monolog\\Handler\\FingersCrossed\\ErrorLevelActivationStrategy',
             ));
         }
+
+        $container->setParameter('monolog.additional_channels', isset($config['channels']) ? $config['channels'] : array());
     }
 
     /**