Add "dump-env" command to compile .env files to .env.local.php

Author: nicolas-grekas

src/Command/DumpEnvCommand.php

@@ -0,0 +1,92 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Flex\Command;
+
+use Composer\Command\BaseCommand;
+use Composer\Config;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Dotenv\Dotenv;
+use Symfony\Flex\Options;
+
+class DumpEnvCommand extends BaseCommand
+{
+    private $config;
+    private $options;
+
+    public function __construct(Config $config, Options $options)
+    {
+        $this->config = $config;
+        $this->options = $options;
+
+        parent::__construct();
+    }
+
+    protected function configure()
+    {
+        $this->setName('symfony:dump-env')
+            ->setAliases(['dump-env'])
+            ->setDescription('Compiles .env files to .env.local.php.')
+            ->setDefinition([
+                new InputArgument('env', InputArgument::REQUIRED, 'The application environment to dump .env files for - e.g. "prod".'),
+            ])
+        ;
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        require $this->config->get('vendor-dir').'/autoload.php';
+
+        if (!class_exists(Dotenv::class)) {
+            throw new \RuntimeException('Please run "composer require symfony/dotenv" to load the ".env" files configuring the application.');
+        }
+
+        $_SERVER['APP_ENV'] = $env = $input->getArgument('env');
+        $path = $this->options->get('root-dir').'/.env';
+        $dotenv = new Dotenv();
+
+        if (method_exists($dotenv, 'loadEnv')) {
+            $dotenv->loadEnv($path);
+        } else {
+            // fallback code in case your Dotenv component is not 4.2 or higher (when loadEnv() was added)
+            $dotenv->load(file_exists($path) || !file_exists($p = "$path.dist") ? $path : $p);
+
+            if ('test' !== $env && file_exists($p = "$path.local")) {
+                $dotenv->load($p);
+            }
+
+            if (file_exists($p = "$path.$env")) {
+                $dotenv->load($p);
+            }
+
+            if (file_exists($p = "$path.$env.local")) {
+                $dotenv->load($p);
+            }
+        }
+
+        $vars = array_flip(explode(',', ($_SERVER['SYMFONY_DOTENV_VARS'] ?? '').',APP_ENV'));
+        $vars = array_intersect_key($_SERVER, $vars);
+        $vars = var_export($vars, true);
+        $vars = <<<EOF
+<?php
+
+// This file was generated by running "composer dump-env $env"
+
+return $vars;
+
+EOF;
+        file_put_contents($path.'.local.php', $vars, LOCK_EX);
+
+        $this->getIO()->writeError('Successfully dumped .env files in <info>.env.local.php</>');
+    }
+}

src/Flex.php

@@ -233,6 +233,7 @@ public function activate(Composer $composer, IOInterface $io)
             $app->add(new Command\UnpackCommand($resolver));
             $app->add(new Command\SyncRecipesCommand($this));
             $app->add(new Command\GenerateIdCommand($this));
+            $app->add(new Command\DumpEnvCommand($this->config, $this->options));
 
             break;
         }