--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection;
+
+use Symfony\Component\Config\Util\XmlUtils;
+use Symfony\Component\DependencyInjection\Exception\EnvNotFoundException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class EnvVarProcessor implements EnvVarProcessorInterface
+{
+ private $container;
+
+ public function __construct(ContainerInterface $container)
+ {
+ $this->container = $container;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function getProvidedTypes()
+ {
+ return array(
+ 'base64' => 'string',
+ 'bool' => 'bool',
+ 'const' => 'bool|int|float|string|array',
+ 'file' => 'string',
+ 'float' => 'float',
+ 'int' => 'int',
+ 'json' => 'array',
+ 'resolve' => 'string',
+ 'string' => 'string',
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getEnv($prefix, $name, \Closure $getEnv)
+ {
+ $i = strpos($name, ':');
+
+ if ('file' === $prefix) {
+ if (!is_scalar($file = $getEnv($name))) {
+ throw new RuntimeException(sprintf('Invalid file name: env var "%s" is non-scalar.', $name));
+ }
+ if (!file_exists($file)) {
+ throw new RuntimeException(sprintf('Env "file:%s" not found: %s does not exist.', $name, $file));
+ }
+
+ return file_get_contents($file);
+ }
+
+ if (false !== $i || 'string' !== $prefix) {
+ if (null === $env = $getEnv($name)) {
+ return;
+ }
+ } elseif (isset($_ENV[$name])) {
+ $env = $_ENV[$name];
+ } elseif (isset($_SERVER[$name]) && 0 !== strpos($name, 'HTTP_')) {
+ $env = $_SERVER[$name];
+ } elseif (false === ($env = getenv($name)) || null === $env) { // null is a possible value because of thread safety issues
+ if (!$this->container->hasParameter("env($name)")) {
+ throw new EnvNotFoundException($name);
+ }
+
+ if (null === $env = $this->container->getParameter("env($name)")) {
+ return;
+ }
+ }
+
+ if (!is_scalar($env)) {
+ throw new RuntimeException(sprintf('Non-scalar env var "%s" cannot be cast to %s.', $name, $prefix));
+ }
+
+ if ('string' === $prefix) {
+ return (string) $env;
+ }
+
+ if ('bool' === $prefix) {
+ return (bool) self::phpize($env);
+ }
+
+ if ('int' === $prefix) {
+ if (!is_numeric($env = self::phpize($env))) {
+ throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to int.', $name));
+ }
+
+ return (int) $env;
+ }
+
+ if ('float' === $prefix) {
+ if (!is_numeric($env = self::phpize($env))) {
+ throw new RuntimeException(sprintf('Non-numeric env var "%s" cannot be cast to float.', $name));
+ }
+
+ return (float) $env;
+ }
+
+ if ('const' === $prefix) {
+ if (!defined($env)) {
+ throw new RuntimeException(sprintf('Env var "%s" maps to undefined constant "%s".', $name, $env));
+ }
+
+ return constant($env);
+ }
+
+ if ('base64' === $prefix) {
+ return base64_decode($env);
+ }
+
+ if ('json' === $prefix) {
+ $env = json_decode($env, true);
+
+ if (JSON_ERROR_NONE !== json_last_error()) {
+ throw new RuntimeException(sprintf('Invalid JSON in env var "%s": '.json_last_error_msg(), $name));
+ }
+
+ if (!is_array($env)) {
+ throw new RuntimeException(sprintf('Invalid JSON env var "%s": array expected, %s given.', $name, gettype($env)));
+ }
+
+ return $env;
+ }
+
+ if ('resolve' === $prefix) {
+ return preg_replace_callback('/%%|%([^%\s]+)%/', function ($match) use ($name) {
+ if (!isset($match[1])) {
+ return '%';
+ }
+ $value = $this->container->getParameter($match[1]);
+ if (!is_scalar($value)) {
+ throw new RuntimeException(sprintf('Parameter "%s" found when resolving env var "%s" must be scalar, "%s" given.', $match[1], $name, gettype($value)));
+ }
+
+ return $value;
+ }, $env);
+ }
+
+ throw new RuntimeException(sprintf('Unsupported env var prefix "%s".', $prefix));
+ }
+
+ private static function phpize($value)
+ {
+ if (!class_exists(XmlUtils::class)) {
+ throw new RuntimeException('The Symfony Config component is required to cast env vars to "bool", "int" or "float".');
+ }
+
+ return XmlUtils::phpize($value);
+ }
+}