[Console] fixed #10531

src/Symfony/Component/Console/Application.php

@@ -469,10 +469,10 @@ class Application
     {
         $namespaces = array();
         foreach ($this->commands as $command) {
-            $namespaces[] = $this->extractNamespace($command->getName());
+            $namespaces = array_merge($namespaces, $this->extractAllNamespaces($command->getName()));
 
             foreach ($command->getAliases() as $alias) {
-                $namespaces[] = $this->extractNamespace($alias);
+                $namespaces = array_merge($namespaces, $this->extractAllNamespaces($alias));
             }
         }
 
@@ -1169,4 +1169,28 @@ class Application
 
         return $lines;
     }
+
+    /**
+     * Returns all namespaces of the command name.
+     *
+     * @param string $name The full name of the command
+     *
+     * @return array The namespaces of the command
+     */
+    private function extractAllNamespaces($name)
+    {
+        // -1 as third argument is needed to skip the command short name when exploding
+        $parts = explode(':', $name, -1);
+        $namespaces = array();
+
+        foreach ($parts as $part) {
+            if (count($namespaces)) {
+                $namespaces[] = end($namespaces).':'.$part;
+            } else {
+                $namespaces[] = $part;
+            }
+        }
+
+        return $namespaces;
+    }
 }

src/Symfony/Component/Console/Tests/ApplicationTest.php

@@ -40,6 +40,8 @@ class ApplicationTest extends \PHPUnit_Framework_TestCase
         require_once self::$fixturesPath.'/Foo2Command.php';
         require_once self::$fixturesPath.'/Foo3Command.php';
         require_once self::$fixturesPath.'/Foo4Command.php';
+        require_once self::$fixturesPath.'/FooSubnamespaced1Command.php';
+        require_once self::$fixturesPath.'/FooSubnamespaced2Command.php';
     }
 
     protected function normalizeLineBreaks($text)
@@ -186,6 +188,14 @@ class ApplicationTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('foo', $application->findNamespace('foo'), '->findNamespace() returns the given namespace if it exists');
     }
 
+    public function testFindNamespaceWithSubnamespaces()
+    {
+        $application = new Application();
+        $application->add(new \FooSubnamespaced1Command());
+        $application->add(new \FooSubnamespaced2Command());
+        $this->assertEquals('foo', $application->findNamespace('foo'), '->findNamespace() returns commands even if the commands are only contained in subnamespaces');
+    }
+
     /**
      * @expectedException        \InvalidArgumentException
      * @expectedExceptionMessage The namespace "f" is ambiguous (foo, foo1).

src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced1Command.php

@@ -0,0 +1,26 @@
+<?php
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class FooSubnamespaced1Command extends Command
+{
+    public $input;
+    public $output;
+
+    protected function configure()
+    {
+        $this
+            ->setName('foo:bar:baz')
+            ->setDescription('The foo:bar:baz command')
+            ->setAliases(array('foobarbaz'))
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $this->input = $input;
+        $this->output = $output;
+    }
+}

src/Symfony/Component/Console/Tests/Fixtures/FooSubnamespaced2Command.php

@@ -0,0 +1,26 @@
+<?php
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class FooSubnamespaced2Command extends Command
+{
+    public $input;
+    public $output;
+
+    protected function configure()
+    {
+        $this
+            ->setName('foo:go:bret')
+            ->setDescription('The foo:bar:go command')
+            ->setAliases(array('foobargo'))
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $this->input = $input;
+        $this->output = $output;
+    }
+}