Downgraded to Symfony 4.4.

bin/cfgen

@@ -8,7 +8,7 @@ use Symfony\Component\Dotenv\Dotenv;
 use Symfony\Component\ErrorHandler\Debug;
 
 if (!in_array(PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
-    echo 'Warning: The console should be invoked via the CLI version of PHP, not the ' . PHP_SAPI . ' SAPI' . PHP_EOL;
+    echo 'Warning: The console should be invoked via the CLI version of PHP, not the '.PHP_SAPI.' SAPI'.PHP_EOL;
 }
 
 set_time_limit(0);
@@ -36,26 +36,38 @@ if (null === $projectDir) {
 require_once $autoloaderPath;
 unset($candidates, $autoloaderPathCandidate, $projectDirCandidate);
 
-if (!class_exists(Application::class) || !class_exists(Dotenv::class)) {
-    throw new LogicException('You need to add "symfony/framework-bundle" and "symfony/dotenv" as Composer dependencies.');
+if (!class_exists(Application::class)) {
+    throw new LogicException('You need to add "symfony/framework-bundle" as a Composer dependency.');
 }
 
 $input = new ArgvInput();
 if (null !== $env = $input->getParameterOption(['--env', '-e'], null, true)) {
-    putenv('APP_ENV=' . $_SERVER['APP_ENV'] = $_ENV['APP_ENV'] = $env);
+    putenv('APP_ENV='.$_SERVER['APP_ENV'] = $_ENV['APP_ENV'] = $env);
 }
 
 if ($input->hasParameterOption('--no-debug', true)) {
-    putenv('APP_DEBUG=' . $_SERVER['APP_DEBUG'] = $_ENV['APP_DEBUG'] = '0');
+    putenv('APP_DEBUG='.$_SERVER['APP_DEBUG'] = $_ENV['APP_DEBUG'] = '0');
 }
 
-if (file_exists($projectDir . '/.env')) {
-    (new Dotenv())->bootEnv($projectDir . '/.env');
+if (!class_exists(Dotenv::class)) {
+    throw new LogicException('Please run "composer require symfony/dotenv" to load the ".env" files configuring the application.');
 }
 
-$debug = false;
-if (isset($_SERVER['APP_DEBUG']) && $_SERVER['APP_DEBUG']) {
-    $debug = true;
+// Load cached env vars if the .env.local.php file exists
+// Run "composer dump-env prod" to create it (requires symfony/flex >=1.2)
+if (is_array($env = @include dirname(__DIR__).'/.env.local.php') && (!isset($env['APP_ENV']) || ($_SERVER['APP_ENV'] ?? $_ENV['APP_ENV'] ?? $env['APP_ENV']) === $env['APP_ENV'])) {
+    (new Dotenv(false))->populate($env);
+} else {
+    // load all the .env files
+    (new Dotenv(false))->loadEnv(dirname(__DIR__).'/.env');
+}
+
+$_SERVER += $_ENV;
+$_SERVER['APP_ENV'] = $_ENV['APP_ENV'] = ($_SERVER['APP_ENV'] ?? $_ENV['APP_ENV'] ?? null) ?: 'dev';
+$_SERVER['APP_DEBUG'] = $_SERVER['APP_DEBUG'] ?? $_ENV['APP_DEBUG'] ?? 'prod' !== $_SERVER['APP_ENV'];
+$_SERVER['APP_DEBUG'] = $_ENV['APP_DEBUG'] = (int) $_SERVER['APP_DEBUG'] || filter_var($_SERVER['APP_DEBUG'], FILTER_VALIDATE_BOOLEAN) ? '1' : '0';
+
+if ($_SERVER['APP_DEBUG']) {
     umask(0000);
 
     if (class_exists(Debug::class)) {
@@ -63,6 +75,6 @@ if (isset($_SERVER['APP_DEBUG']) && $_SERVER['APP_DEBUG']) {
     }
 }
 
-$kernel = new StandaloneKernel($_SERVER['APP_ENV'], $debug);
+$kernel = new StandaloneKernel($_SERVER['APP_ENV'], (bool) $_SERVER['APP_DEBUG']);
 $application = new Application($kernel);
 $application->run($input);

composer.json

@@ -14,10 +14,10 @@
         "ext-json": "*",
         "contao/core-bundle": "4.*",
         "paragonie/sodium_compat": "^1.14",
-        "symfony/framework-bundle": "4.4.* || 5.2.*",
-        "symfony/console": "4.4.* || 5.2.*",
-        "symfony/dotenv": "4.4.* || 5.2.*",
-        "symfony/yaml": "4.4.* || 5.2.*",
+        "symfony/framework-bundle": "4.4.*",
+        "symfony/console": "4.4.*",
+        "symfony/dotenv": "4.4.*",
+        "symfony/yaml": "4.4.*",
         "zordius/lightncandy": "^1.2"
     },
     "require-dev": {

src/Command/GenerateConfigsCommand.php

@@ -39,6 +39,6 @@ class GenerateConfigsCommand extends Command
             $output
         );
 
-        return $success ? Command::SUCCESS : Command::FAILURE;
+        return $success ? 0 : 1;
     }
 }