run PHP CS Fixer on Travis

Author: keradus

.gitignore

@@ -3,6 +3,7 @@
 !/bin/validate-json
 coverage
 .buildpath
+.php_cs.cache
 .project
 .settings
 composer.lock

.php_cs

@@ -0,0 +1,14 @@
+<?php
+
+use Symfony\CS\Config\Config;
+use Symfony\CS\FixerInterface;
+
+$config = Config::create()
+    ->level(Symfony\CS\FixerInterface::PSR2_LEVEL)
+    ->setUsingCache(true)
+    ->setUsingLinter(false);
+
+$finder = $config->getFinder()
+    ->in(__DIR__);
+
+return $config;

.travis.yml

@@ -16,8 +16,10 @@ install:
   - sudo apt-get -y install pypy python-sphinx graphviz
   - composer selfupdate
   - travis_retry composer update --no-interaction --prefer-source
+  - curl http://get.sensiolabs.org/php-cs-fixer.phar -o php-cs-fixer.phar
 
 script:
   - cd docs && make linkcheck && cd ..
   - vendor/bin/phpdoc.php -d src -t docs-api
   - vendor/bin/phpunit --coverage-text
+  - if [[ `php -r "echo version_compare(PHP_VERSION, '5.3.6', '>=') && !defined('HHVM_VERSION');"` ]]; then php php-cs-fixer.phar --diff --dry-run -vv fix; fi