[Dotenv] Reimplementing symfony/flex' dump-env as a Symfony command

CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+5.4
+---
+
+ * Add `dotenv:dump` command to compile the contents of the .env files into a PHP-optimized file called `.env.local.php`
+
 5.1.0
 -----
 

Command/DotenvDumpCommand.php

@@ -0,0 +1,128 @@
+<?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\Component\Dotenv\Command;
+
+use Symfony\Bundle\FrameworkBundle\Console\Application;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Dotenv\Dotenv;
+
+/**
+ * A console command to compile the contents of the .env files into a PHP-optimized file called .env.local.php.
+ *
+ * @internal
+ */
+final class DotenvDumpCommand extends Command
+{
+    protected static $defaultName = 'dotenv:dump';
+    protected static $defaultDescription = 'Compiles .env files to .env.local.php';
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this
+            ->setDescription('Compiles .env files to .env.local.php.')
+            ->setDefinition([
+                new InputArgument('env', InputArgument::OPTIONAL, 'The application environment to dump .env files for - e.g. "prod".'),
+            ])
+            ->addOption('empty', null, InputOption::VALUE_NONE, 'Ignore the content of .env files')
+            ->setHelp(<<<'EOT'
+The <info>%command.name%</info> command compiles the contents of the .env files into a PHP-optimized file called .env.local.php.
+
+    <info>%command.full_name%</info>
+EOT
+            )
+        ;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        /** @var Application $application */
+        $application = $this->getApplication();
+        $kernel = $application->getKernel();
+
+        if ($env = $input->getArgument('env')) {
+            $_SERVER['APP_ENV'] = $env;
+        }
+
+        $path = $kernel->getProjectDir().'/.env';
+
+        if (!$env || !$input->getOption('empty')) {
+            $vars = $this->loadEnv($path, $env, $kernel->getProjectDir().'/composer.json');
+            $env = $vars['APP_ENV'];
+        }
+
+        if ($input->getOption('empty')) {
+            $vars = ['APP_ENV' => $env];
+        }
+
+        $vars = var_export($vars, true);
+        $vars = <<<EOF
+<?php
+
+// This file was generated by running "php bin/console dotenv:dump $env"
+
+return $vars;
+
+EOF;
+        file_put_contents($path.'.local.php', $vars, \LOCK_EX);
+
+        $output->writeln('Successfully dumped .env files in <info>.env.local.php</>');
+
+        return Command::SUCCESS;
+    }
+
+    private function loadEnv(string $path, ?string $env, $composerFilePath): array
+    {
+        $globalsBackup = [$_SERVER, $_ENV];
+        unset($_SERVER['APP_ENV']);
+        $_ENV = ['APP_ENV' => $env];
+        $_SERVER['SYMFONY_DOTENV_VARS'] = implode(',', array_keys($_SERVER));
+        putenv('SYMFONY_DOTENV_VARS='.$_SERVER['SYMFONY_DOTENV_VARS']);
+
+        try {
+            $dotenv = new Dotenv();
+
+            if (!$env && file_exists($p = "$path.local")) {
+                $env = $_ENV['APP_ENV'] = $dotenv->parse(file_get_contents($p), $p)['APP_ENV'] ?? null;
+            }
+
+            if (!$env) {
+                throw new \RuntimeException('Please provide the name of the environment either by passing it as command line argument or by defining the "APP_ENV" variable in the ".env.local" file.');
+            }
+
+            $dotenv->loadEnv(
+                $path,
+                null,
+                'dev',
+                json_decode(file_get_contents($composerFilePath), true)['extra']['runtime']['test_envs'] ?? ['test']
+            );
+
+            if (isset($_ENV['SYMFONY_DOTENV_VARS'])) {
+                unset($_ENV['SYMFONY_DOTENV_VARS']);
+            }
+            $env = $_ENV;
+        } finally {
+            [$_SERVER, $_ENV] = $globalsBackup;
+        }
+
+        return $env;
+    }
+}

composer.json

@@ -20,6 +20,8 @@
         "symfony/deprecation-contracts": "^2.1"
     },
     "require-dev": {
+        "symfony/console": "^5.4|^6.0",
+        "symfony/filesystem": "^4.4|^5.0|^6.0",
         "symfony/process": "^4.4|^5.0|^6.0"
     },
     "autoload": {