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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\DependencyInjection\ParameterBag;
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use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
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use Symfony\Component\DependencyInjection\Exception\RuntimeException;
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/**
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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class EnvPlaceholderParameterBag extends ParameterBag
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{
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private $envPlaceholderUniquePrefix;
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private $envPlaceholders = [];
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private $unusedEnvPlaceholders = [];
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private $providedTypes = [];
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private static $counter = 0;
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/**
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* {@inheritdoc}
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*/
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public function get(string $name)
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{
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if (str_starts_with($name, 'env(') && str_ends_with($name, ')') && 'env()' !== $name) {
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$env = substr($name, 4, -1);
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if (isset($this->envPlaceholders[$env])) {
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foreach ($this->envPlaceholders[$env] as $placeholder) {
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return $placeholder; // return first result
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}
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}
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if (isset($this->unusedEnvPlaceholders[$env])) {
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foreach ($this->unusedEnvPlaceholders[$env] as $placeholder) {
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return $placeholder; // return first result
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}
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}
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if (!preg_match('/^(?:[-.\w]*+:)*+\w++$/', $env)) {
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throw new InvalidArgumentException(sprintf('Invalid %s name: only "word" characters are allowed.', $name));
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}
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if ($this->has($name) && null !== ($defaultValue = parent::get($name)) && !\is_string($defaultValue)) {
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throw new RuntimeException(sprintf('The default value of an env() parameter must be a string or null, but "%s" given to "%s".', get_debug_type($defaultValue), $name));
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}
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$uniqueName = md5($name.'_'.self::$counter++);
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$placeholder = sprintf('%s_%s_%s', $this->getEnvPlaceholderUniquePrefix(), strtr($env, ':-.', '___'), $uniqueName);
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$this->envPlaceholders[$env][$placeholder] = $placeholder;
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return $placeholder;
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}
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return parent::get($name);
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}
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/**
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* Gets the common env placeholder prefix for env vars created by this bag.
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*/
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public function getEnvPlaceholderUniquePrefix(): string
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{
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if (null === $this->envPlaceholderUniquePrefix) {
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$reproducibleEntropy = unserialize(serialize($this->parameters));
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array_walk_recursive($reproducibleEntropy, function (&$v) { $v = null; });
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$this->envPlaceholderUniquePrefix = 'env_'.substr(md5(serialize($reproducibleEntropy)), -16);
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}
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return $this->envPlaceholderUniquePrefix;
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}
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/**
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* Returns the map of env vars used in the resolved parameter values to their placeholders.
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*
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* @return string[][] A map of env var names to their placeholders
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*/
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public function getEnvPlaceholders()
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{
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return $this->envPlaceholders;
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}
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public function getUnusedEnvPlaceholders(): array
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{
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return $this->unusedEnvPlaceholders;
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}
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public function clearUnusedEnvPlaceholders()
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{
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$this->unusedEnvPlaceholders = [];
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}
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/**
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* Merges the env placeholders of another EnvPlaceholderParameterBag.
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*/
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public function mergeEnvPlaceholders(self $bag)
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{
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if ($newPlaceholders = $bag->getEnvPlaceholders()) {
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$this->envPlaceholders += $newPlaceholders;
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foreach ($newPlaceholders as $env => $placeholders) {
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$this->envPlaceholders[$env] += $placeholders;
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}
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}
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if ($newUnusedPlaceholders = $bag->getUnusedEnvPlaceholders()) {
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$this->unusedEnvPlaceholders += $newUnusedPlaceholders;
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foreach ($newUnusedPlaceholders as $env => $placeholders) {
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$this->unusedEnvPlaceholders[$env] += $placeholders;
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}
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}
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}
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/**
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* Maps env prefixes to their corresponding PHP types.
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*/
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public function setProvidedTypes(array $providedTypes)
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{
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$this->providedTypes = $providedTypes;
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}
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/**
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* Gets the PHP types corresponding to env() parameter prefixes.
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*
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* @return string[][]
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*/
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public function getProvidedTypes()
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{
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return $this->providedTypes;
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}
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/**
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* {@inheritdoc}
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*/
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public function resolve()
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{
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if ($this->resolved) {
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return;
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}
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parent::resolve();
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foreach ($this->envPlaceholders as $env => $placeholders) {
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if ($this->has($name = "env($env)") && null !== ($default = $this->parameters[$name]) && !\is_string($default)) {
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throw new RuntimeException(sprintf('The default value of env parameter "%s" must be a string or null, "%s" given.', $env, get_debug_type($default)));
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}
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}
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}
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}
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