Enhancement: Use friendsofphp/php-cs-fixer to enforce at least PSR-2

.circleci/config.yml

@@ -14,6 +14,9 @@ workflows:
 php-docker-template: &php-docker-template
   steps:
     - checkout
+    - run:
+        name: validate composer.json
+        command: composer validate
     - run:
         name: install current dependencies
         command: composer install --no-progress
@@ -67,8 +70,14 @@ jobs:
             sudo php /tmp/composer-setup.php --install-dir=/usr/local/bin --filename=composer
       - checkout
       - run:
-          name: update dependencies # the dependencies in composer.lock don't work with 5.5
-          command: composer update --no-progress
+          name: validate composer.json
+          command: composer validate
+      - run:
+          name: install current dependencies
+          command: composer install --no-progress
+      - run:
+          name: run php-cs-fixer
+          command: vendor/bin/php-cs-fixer fix --diff --dry-run --verbose
       - run:
           name: run tests
           command: vendor/bin/phpunit --log-junit ~/phpunit/junit.xml --coverage-text tests

.gitignore

@@ -2,6 +2,7 @@
 /doc/
 *.iml
 composer.phar
+.php_cs.cache
 .vagrant
 integration-tests/vendor
 composer.lock

.php_cs

@@ -0,0 +1,10 @@
+<?php
+
+$finder = PhpCsFixer\Finder::create()->in(__DIR__);
+
+return PhpCsFixer\Config::create()
+    ->setFinder($finder)
+    ->setUsingCache(true)
+    ->setRules([
+        '@PSR2' => true,
+    ]);

composer.json

@@ -19,6 +19,7 @@
         "psr/log": "^1.0"
     },
     "require-dev": {
+        "friendsofphp/php-cs-fixer": "~2.2.19",
         "guzzlehttp/guzzle": "^6.2.1",
         "kevinrob/guzzle-cache-middleware": "^1.4.1",
         "phpdocumentor/phpdocumentor": "^2.0",
@@ -43,5 +44,8 @@
     },
     "config": {
         "sort-packages": true
+    },
+    "scripts": {
+        "cs": "vendor/bin/php-cs-fixer fix --diff --verbose"
     }
 }