Supports string and array settings for file_extensions config

Dockerfile

@@ -16,19 +16,22 @@ RUN apk --update add \
       php7-openssl \
       php7-pcntl \
       php7-phar \
+      php7-simplexml \
       php7-sockets \
+      php7-tokenizer \
+      php7-xmlwriter \
       php7-xml && \
     rm /var/cache/apk/* && \
-    ln -s /usr/bin/php7 /usr/bin/php
+    ln -sf /usr/bin/php7 /usr/bin/php
 
 COPY composer.* ./
 
 RUN apk --update add curl && \
     curl -sS https://getcomposer.org/installer | php && \
     ./composer.phar install && \
+    mv composer.phar /usr/local/bin/composer && \
     apk del curl && \
-    rm /usr/src/app/composer.phar \
-       /var/cache/apk/*
+    rm /var/cache/apk/*
 
 COPY bin/build-content ./bin/build-content
 

Makefile

@@ -10,7 +10,7 @@ composer-update:
 	  --rm \
 	  --volume $(PWD)/composer.json:/usr/src/app/composer.json:ro \
 	  $(IMAGE_NAME) \
-	  sh -c 'php composer.phar update && cat composer.lock' > composer.lock
+	  sh -c 'cd /usr/src/app && composer update && cat composer.lock' > composer.lock
 
 citest:
 	docker run --rm $(IMAGE_NAME) sh -c "cd /usr/src/app && vendor/bin/phpunit --bootstrap engine.php ./tests"

Runner.php

@@ -92,7 +92,13 @@ public function run($files)
             $phpmd = new PHPMD();
 
             if (isset($this->config['config']['file_extensions'])) {
-                $phpmd->setFileExtensions(explode(',', $this->config['config']['file_extensions']));
+                $fileExtensions = $this->config['config']['file_extensions'];
+
+                if (is_string($fileExtensions)) {
+                    $fileExtensions = explode(',', $fileExtensions);
+                }
+
+                $phpmd->setFileExtensions($fileExtensions);
             }
 
             $rulesets = Runner::RULESETS;