Fix lowercase issues with unicode characters

src/Symfony/Installer/NewCommand.php

@@ -395,13 +395,14 @@ protected function generateComposerProjectName()
      */
     private function fixComposerPackageName($name)
     {
-        return strtolower(
-            preg_replace(
-                array('/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'),
-                array('\\1-\\2', '\\1-\\2'),
-                strtr($name, '-', '.')
-            )
+        $name = str_replace(
+            ['à', 'á', 'â', 'ä', 'æ', 'ã', 'å', 'ā', 'é', 'è', 'ê', 'ë', 'ę', 'ė', 'ē', 'ī', 'į', 'í', 'ì', 'ï', 'î', 'ō', 'ø', 'œ', 'õ', 'ó', 'ò', 'ö', 'ô', 'ū', 'ú', 'ù', 'ü', 'û', 'ç', 'ć', 'č', 'ł', 'ñ', 'ń', 'ß', 'ś', 'š', 'ŵ', 'ŷ', 'ÿ', 'ź', 'ž', 'ż'],
+            ['a', 'a', 'a', 'a', 'a', 'a', 'a', 'a', 'e', 'e', 'e', 'e', 'e', 'e', 'e', 'i', 'i', 'i', 'i', 'i', 'i', 'o', 'o', 'o', 'o', 'o', 'o', 'o', 'o', 'u', 'u', 'u', 'u', 'u', 'c', 'c', 'c', 'l', 'n', 'n', 's', 's', 's', 'w', 'y', 'y', 'z', 'z', 'z'],
+            $name
         );
+        $name = preg_replace('#[^A-Za-z0-9_./-]+#', '', $name);
+
+        return strtolower($name);
     }
 
     protected function getDownloadedApplicationType()

tests/Symfony/Installer/Tests/NewCommandTest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Symfony\Installer\Tests;
+
+use Symfony\Installer\NewCommand;
+
+class NewCommandTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @dataProvider getProjectNames
+     */
+    public function testFixComposerPackageName($originalName, $expectedName)
+    {
+        $command = new NewCommand();
+        $method = new \ReflectionMethod($command, 'fixComposerPackageName');
+        $method->setAccessible(true);
+
+        $fixedName = $method->invoke($command, $originalName);
+        $this->assertSame($expectedName, $fixedName);
+    }
+
+    public function getProjectNames()
+    {
+        return [
+            ['foo/bar', 'foo/bar'],
+            ['áèî/øū', 'aei/ou'],
+            ['çñß/łŵž', 'cns/lwz'],
+            ['foo#bar\foo?bar=foo!bar{foo]bar', 'foobarfoobarfoobarfoobar'],
+            ['FOO/bar', 'foo/bar'],
+        ];
+    }
+}