Add an option to disable parameter handler in composer production mode

Processor.php

@@ -16,13 +16,18 @@ public function __construct(IOInterface $io)
         $this->io = $io;
     }
 
-    public function processFile(array $config)
+    public function processFile(array $config, $devMode = true)
     {
         $config = $this->processConfig($config);
 
         $realFile = $config['file'];
         $parameterKey = $config['parameter-key'];
 
+        if ($devMode !== true && !empty($config['dev-only']) && true === $config['dev-only']) {
+            $this->io->write(sprintf('<info>Skipping the "%s" file</info>', $realFile));
+            return;
+        }
+
         $exists = is_file($realFile);
 
         $yamlParser = new Parser();

README.md

@@ -149,6 +149,24 @@ If the old parameter is no longer present (maybe because it has been renamed and
 removed already), no parameters are overwritten. You don't need to remove obsolete
 parameters from the rename map once they have been renamed.
 
+### Skipping file in production mode
+
+You can enable the parameter handler only in development mode:
+
+```json
+{
+    "extra": {
+        "incenteev-parameters": {
+            "dev-only": true
+        }
+    }
+}
+
+```
+
+Doing that, calling composer with `--no-dev` flag will disable the parameter
+handler.
+
 ### Managing multiple ignored files
 
 The parameter handler can manage multiple ignored files. To use this feature,

ScriptHandler.php

@@ -31,7 +31,7 @@ public static function buildParameters(Event $event)
                 throw new \InvalidArgumentException('The extra.incenteev-parameters setting must be an array of configuration objects.');
             }
 
-            $processor->processFile($config);
+            $processor->processFile($config, $event->isDevMode());
         }
     }
 }

Tests/ProcessorTest.php

@@ -171,4 +171,34 @@ public function provideParameterHandlingTestCases()
 
         return $tests;
     }
+
+    public function testNoDev()
+    {
+        $dataDir = __DIR__.'/fixtures/dev_only';
+
+        $testCase = array_replace_recursive(
+            array(
+                'title' => 'unknown test',
+                'config' => array(
+                    'file' => 'parameters.yml',
+                ),
+                'dist-file' => 'parameters.yml.dist',
+                'environment' => array(),
+                'interactive' => false,
+            ),
+            (array) Yaml::parse(file_get_contents($dataDir.'/setup.yml'))
+        );
+
+        $workingDir = sys_get_temp_dir() . '/incenteev_parameter_handler';
+        $this->initializeTestCase($testCase, $dataDir, $workingDir);
+
+        $message = sprintf('<info>Skipping the "%s" file</info>', $testCase['config']['file']);
+        $this->io->write($message)->shouldBeCalled();
+
+        $this->setInteractionExpectations($testCase);
+
+        $this->processor->processFile($testCase['config'], false);
+
+        $this->assertFileEquals($dataDir.'/expected.yml', $workingDir.'/'.$testCase['config']['file'], $testCase['title']);
+    }
 }

Tests/ScriptHandlerTest.php

@@ -23,6 +23,7 @@ protected function setUp()
         $composer->getPackage()->willReturn($this->package);
         $this->event->getComposer()->willReturn($composer);
         $this->event->getIO()->willReturn($this->io);
+        $this->event->isDevMode()->willReturn(true);
     }
 
     /**

Tests/fixtures/dev_only/dist.yml

@@ -0,0 +1,3 @@
+parameters:
+    foo: bar
+    foo2: bar2

Tests/fixtures/dev_only/existing.yml

@@ -0,0 +1,3 @@
+# This file is auto-generated during the composer install
+parameters:
+    foo: bar

Tests/fixtures/dev_only/expected.yml

@@ -0,0 +1,3 @@
+# This file is auto-generated during the composer install
+parameters:
+    foo: bar

Tests/fixtures/dev_only/setup.yml

@@ -0,0 +1,4 @@
+title: Skip file in production mode
+
+config:
+    dev-only: true