521 lines
19 KiB
PHP
Executable File
521 lines
19 KiB
PHP
Executable File
<?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\Dotenv;
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use Symfony\Component\Dotenv\Exception\FormatException;
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use Symfony\Component\Dotenv\Exception\FormatExceptionContext;
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use Symfony\Component\Dotenv\Exception\PathException;
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use Symfony\Component\Process\Exception\ExceptionInterface as ProcessException;
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use Symfony\Component\Process\Process;
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/**
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* Manages .env files.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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* @author Kévin Dunglas <dunglas@gmail.com>
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*/
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final class Dotenv
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{
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public const VARNAME_REGEX = '(?i:[A-Z][A-Z0-9_]*+)';
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public const STATE_VARNAME = 0;
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public const STATE_VALUE = 1;
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private $path;
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private $cursor;
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private $lineno;
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private $data;
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private $end;
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private $values;
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private $usePutenv;
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/**
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* @var bool If `putenv()` should be used to define environment variables or not.
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* Beware that `putenv()` is not thread safe and this setting will default
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* to `false` in Symfony 5.0.
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*/
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public function __construct(bool $usePutenv = true)
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{
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if (!\func_num_args()) {
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@trigger_error(sprintf('The default value of "$usePutenv" argument of "%s" will be changed from "true" to "false" in Symfony 5.0. You should define its value explicitly.', __METHOD__), \E_USER_DEPRECATED);
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}
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$this->usePutenv = $usePutenv;
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}
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/**
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* Loads one or several .env files.
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*
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* @param string $path A file to load
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* @param string[] ...$extraPaths A list of additional files to load
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*
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* @throws FormatException when a file has a syntax error
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* @throws PathException when a file does not exist or is not readable
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*/
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public function load(string $path, string ...$extraPaths): void
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{
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$this->doLoad(false, \func_get_args());
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}
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/**
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* Loads a .env file and the corresponding .env.local, .env.$env and .env.$env.local files if they exist.
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*
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* .env.local is always ignored in test env because tests should produce the same results for everyone.
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* .env.dist is loaded when it exists and .env is not found.
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*
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* @param string $path A file to load
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* @param string $varName The name of the env vars that defines the app env
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* @param string $defaultEnv The app env to use when none is defined
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* @param array $testEnvs A list of app envs for which .env.local should be ignored
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*
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* @throws FormatException when a file has a syntax error
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* @throws PathException when a file does not exist or is not readable
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*/
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public function loadEnv(string $path, string $varName = 'APP_ENV', string $defaultEnv = 'dev', array $testEnvs = ['test']): void
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{
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if (file_exists($path) || !file_exists($p = "$path.dist")) {
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$this->load($path);
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} else {
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$this->load($p);
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}
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if (null === $env = $_SERVER[$varName] ?? $_ENV[$varName] ?? null) {
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$this->populate([$varName => $env = $defaultEnv]);
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}
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if (!\in_array($env, $testEnvs, true) && file_exists($p = "$path.local")) {
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$this->load($p);
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$env = $_SERVER[$varName] ?? $_ENV[$varName] ?? $env;
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}
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if ('local' === $env) {
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return;
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}
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if (file_exists($p = "$path.$env")) {
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$this->load($p);
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}
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if (file_exists($p = "$path.$env.local")) {
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$this->load($p);
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}
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}
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/**
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* Loads one or several .env files and enables override existing vars.
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*
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* @param string $path A file to load
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* @param string[] ...$extraPaths A list of additional files to load
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*
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* @throws FormatException when a file has a syntax error
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* @throws PathException when a file does not exist or is not readable
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*/
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public function overload(string $path, string ...$extraPaths): void
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{
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$this->doLoad(true, \func_get_args());
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}
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/**
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* Sets values as environment variables (via putenv, $_ENV, and $_SERVER).
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*
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* @param array $values An array of env variables
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* @param bool $overrideExistingVars true when existing environment variables must be overridden
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*/
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public function populate(array $values, bool $overrideExistingVars = false): void
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{
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$updateLoadedVars = false;
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$loadedVars = array_flip(explode(',', $_SERVER['SYMFONY_DOTENV_VARS'] ?? $_ENV['SYMFONY_DOTENV_VARS'] ?? ''));
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foreach ($values as $name => $value) {
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$notHttpName = 0 !== strpos($name, 'HTTP_');
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if (isset($_SERVER[$name]) && $notHttpName && !isset($_ENV[$name])) {
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$_ENV[$name] = $_SERVER[$name];
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}
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// don't check existence with getenv() because of thread safety issues
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if (!isset($loadedVars[$name]) && !$overrideExistingVars && isset($_ENV[$name])) {
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continue;
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}
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if ($this->usePutenv) {
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putenv("$name=$value");
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}
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$_ENV[$name] = $value;
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if ($notHttpName) {
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$_SERVER[$name] = $value;
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}
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if (!isset($loadedVars[$name])) {
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$loadedVars[$name] = $updateLoadedVars = true;
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}
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}
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if ($updateLoadedVars) {
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unset($loadedVars['']);
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$loadedVars = implode(',', array_keys($loadedVars));
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$_ENV['SYMFONY_DOTENV_VARS'] = $_SERVER['SYMFONY_DOTENV_VARS'] = $loadedVars;
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if ($this->usePutenv) {
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putenv('SYMFONY_DOTENV_VARS='.$loadedVars);
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}
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}
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}
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/**
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* Parses the contents of an .env file.
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*
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* @param string $data The data to be parsed
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* @param string $path The original file name where data where stored (used for more meaningful error messages)
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*
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* @return array An array of env variables
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*
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* @throws FormatException when a file has a syntax error
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*/
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public function parse(string $data, string $path = '.env'): array
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{
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$this->path = $path;
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$this->data = str_replace(["\r\n", "\r"], "\n", $data);
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$this->lineno = 1;
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$this->cursor = 0;
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$this->end = \strlen($this->data);
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$state = self::STATE_VARNAME;
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$this->values = [];
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$name = '';
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$this->skipEmptyLines();
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while ($this->cursor < $this->end) {
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switch ($state) {
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case self::STATE_VARNAME:
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$name = $this->lexVarname();
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$state = self::STATE_VALUE;
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break;
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case self::STATE_VALUE:
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$this->values[$name] = $this->lexValue();
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$state = self::STATE_VARNAME;
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break;
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}
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}
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if (self::STATE_VALUE === $state) {
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$this->values[$name] = '';
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}
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try {
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return $this->values;
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} finally {
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$this->values = [];
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$this->data = null;
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$this->path = null;
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}
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}
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private function lexVarname(): string
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{
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// var name + optional export
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if (!preg_match('/(export[ \t]++)?('.self::VARNAME_REGEX.')/A', $this->data, $matches, 0, $this->cursor)) {
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throw $this->createFormatException('Invalid character in variable name');
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}
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$this->moveCursor($matches[0]);
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if ($this->cursor === $this->end || "\n" === $this->data[$this->cursor] || '#' === $this->data[$this->cursor]) {
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if ($matches[1]) {
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throw $this->createFormatException('Unable to unset an environment variable');
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}
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throw $this->createFormatException('Missing = in the environment variable declaration');
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}
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if (' ' === $this->data[$this->cursor] || "\t" === $this->data[$this->cursor]) {
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throw $this->createFormatException('Whitespace characters are not supported after the variable name');
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}
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if ('=' !== $this->data[$this->cursor]) {
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throw $this->createFormatException('Missing = in the environment variable declaration');
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}
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++$this->cursor;
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return $matches[2];
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}
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private function lexValue(): string
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{
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if (preg_match('/[ \t]*+(?:#.*)?$/Am', $this->data, $matches, 0, $this->cursor)) {
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$this->moveCursor($matches[0]);
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$this->skipEmptyLines();
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return '';
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}
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if (' ' === $this->data[$this->cursor] || "\t" === $this->data[$this->cursor]) {
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throw $this->createFormatException('Whitespace are not supported before the value');
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}
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$loadedVars = array_flip(explode(',', $_SERVER['SYMFONY_DOTENV_VARS'] ?? ($_ENV['SYMFONY_DOTENV_VARS'] ?? '')));
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unset($loadedVars['']);
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$v = '';
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do {
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if ("'" === $this->data[$this->cursor]) {
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$len = 0;
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do {
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if ($this->cursor + ++$len === $this->end) {
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$this->cursor += $len;
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throw $this->createFormatException('Missing quote to end the value');
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}
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} while ("'" !== $this->data[$this->cursor + $len]);
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$v .= substr($this->data, 1 + $this->cursor, $len - 1);
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$this->cursor += 1 + $len;
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} elseif ('"' === $this->data[$this->cursor]) {
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$value = '';
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if (++$this->cursor === $this->end) {
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throw $this->createFormatException('Missing quote to end the value');
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}
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while ('"' !== $this->data[$this->cursor] || ('\\' === $this->data[$this->cursor - 1] && '\\' !== $this->data[$this->cursor - 2])) {
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$value .= $this->data[$this->cursor];
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++$this->cursor;
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if ($this->cursor === $this->end) {
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throw $this->createFormatException('Missing quote to end the value');
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}
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}
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++$this->cursor;
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$value = str_replace(['\\"', '\r', '\n'], ['"', "\r", "\n"], $value);
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$resolvedValue = $value;
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$resolvedValue = $this->resolveVariables($resolvedValue, $loadedVars);
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$resolvedValue = $this->resolveCommands($resolvedValue, $loadedVars);
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$resolvedValue = str_replace('\\\\', '\\', $resolvedValue);
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$v .= $resolvedValue;
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} else {
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$value = '';
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$prevChr = $this->data[$this->cursor - 1];
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while ($this->cursor < $this->end && !\in_array($this->data[$this->cursor], ["\n", '"', "'"], true) && !((' ' === $prevChr || "\t" === $prevChr) && '#' === $this->data[$this->cursor])) {
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if ('\\' === $this->data[$this->cursor] && isset($this->data[$this->cursor + 1]) && ('"' === $this->data[$this->cursor + 1] || "'" === $this->data[$this->cursor + 1])) {
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++$this->cursor;
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}
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$value .= $prevChr = $this->data[$this->cursor];
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if ('$' === $this->data[$this->cursor] && isset($this->data[$this->cursor + 1]) && '(' === $this->data[$this->cursor + 1]) {
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++$this->cursor;
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$value .= '('.$this->lexNestedExpression().')';
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}
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++$this->cursor;
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}
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$value = rtrim($value);
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$resolvedValue = $value;
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$resolvedValue = $this->resolveVariables($resolvedValue, $loadedVars);
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$resolvedValue = $this->resolveCommands($resolvedValue, $loadedVars);
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$resolvedValue = str_replace('\\\\', '\\', $resolvedValue);
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if ($resolvedValue === $value && preg_match('/\s+/', $value)) {
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throw $this->createFormatException('A value containing spaces must be surrounded by quotes');
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}
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$v .= $resolvedValue;
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if ($this->cursor < $this->end && '#' === $this->data[$this->cursor]) {
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break;
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}
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}
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} while ($this->cursor < $this->end && "\n" !== $this->data[$this->cursor]);
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$this->skipEmptyLines();
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return $v;
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}
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private function lexNestedExpression(): string
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{
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++$this->cursor;
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$value = '';
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while ("\n" !== $this->data[$this->cursor] && ')' !== $this->data[$this->cursor]) {
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$value .= $this->data[$this->cursor];
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if ('(' === $this->data[$this->cursor]) {
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$value .= $this->lexNestedExpression().')';
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}
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++$this->cursor;
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if ($this->cursor === $this->end) {
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throw $this->createFormatException('Missing closing parenthesis.');
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}
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}
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if ("\n" === $this->data[$this->cursor]) {
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throw $this->createFormatException('Missing closing parenthesis.');
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}
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return $value;
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}
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private function skipEmptyLines()
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{
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if (preg_match('/(?:\s*+(?:#[^\n]*+)?+)++/A', $this->data, $match, 0, $this->cursor)) {
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$this->moveCursor($match[0]);
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}
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}
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private function resolveCommands(string $value, array $loadedVars): string
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{
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if (false === strpos($value, '$')) {
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return $value;
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}
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$regex = '/
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(\\\\)? # escaped with a backslash?
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\$
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(?<cmd>
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\( # require opening parenthesis
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([^()]|\g<cmd>)+ # allow any number of non-parens, or balanced parens (by nesting the <cmd> expression recursively)
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\) # require closing paren
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)
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/x';
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return preg_replace_callback($regex, function ($matches) use ($loadedVars) {
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if ('\\' === $matches[1]) {
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return substr($matches[0], 1);
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}
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if ('\\' === \DIRECTORY_SEPARATOR) {
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throw new \LogicException('Resolving commands is not supported on Windows.');
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}
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if (!class_exists(Process::class)) {
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throw new \LogicException('Resolving commands requires the Symfony Process component.');
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}
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$process = method_exists(Process::class, 'fromShellCommandline') ? Process::fromShellCommandline('echo '.$matches[0]) : new Process('echo '.$matches[0]);
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if (!method_exists(Process::class, 'fromShellCommandline') && method_exists(Process::class, 'inheritEnvironmentVariables')) {
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// Symfony 3.4 does not inherit env vars by default:
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$process->inheritEnvironmentVariables();
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}
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$env = [];
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foreach ($this->values as $name => $value) {
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if (isset($loadedVars[$name]) || (!isset($_ENV[$name]) && !(isset($_SERVER[$name]) && 0 !== strpos($name, 'HTTP_')))) {
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$env[$name] = $value;
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}
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}
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$process->setEnv($env);
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try {
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$process->mustRun();
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} catch (ProcessException $e) {
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throw $this->createFormatException(sprintf('Issue expanding a command (%s)', $process->getErrorOutput()));
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}
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return preg_replace('/[\r\n]+$/', '', $process->getOutput());
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}, $value);
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}
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private function resolveVariables(string $value, array $loadedVars): string
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{
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if (false === strpos($value, '$')) {
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return $value;
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}
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$regex = '/
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(?<!\\\\)
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(?P<backslashes>\\\\*) # escaped with a backslash?
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\$
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(?!\() # no opening parenthesis
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(?P<opening_brace>\{)? # optional brace
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(?P<name>'.self::VARNAME_REGEX.')? # var name
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(?P<default_value>:[-=][^\}]++)? # optional default value
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(?P<closing_brace>\})? # optional closing brace
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/x';
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$value = preg_replace_callback($regex, function ($matches) use ($loadedVars) {
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// odd number of backslashes means the $ character is escaped
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if (1 === \strlen($matches['backslashes']) % 2) {
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return substr($matches[0], 1);
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}
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// unescaped $ not followed by variable name
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if (!isset($matches['name'])) {
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return $matches[0];
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}
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if ('{' === $matches['opening_brace'] && !isset($matches['closing_brace'])) {
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throw $this->createFormatException('Unclosed braces on variable expansion');
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}
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$name = $matches['name'];
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if (isset($loadedVars[$name]) && isset($this->values[$name])) {
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$value = $this->values[$name];
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} elseif (isset($_ENV[$name])) {
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$value = $_ENV[$name];
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} elseif (isset($_SERVER[$name]) && 0 !== strpos($name, 'HTTP_')) {
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$value = $_SERVER[$name];
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} elseif (isset($this->values[$name])) {
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$value = $this->values[$name];
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} else {
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$value = (string) getenv($name);
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}
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if ('' === $value && isset($matches['default_value']) && '' !== $matches['default_value']) {
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$unsupportedChars = strpbrk($matches['default_value'], '\'"{$');
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if (false !== $unsupportedChars) {
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throw $this->createFormatException(sprintf('Unsupported character "%s" found in the default value of variable "$%s".', $unsupportedChars[0], $name));
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}
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$value = substr($matches['default_value'], 2);
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if ('=' === $matches['default_value'][1]) {
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$this->values[$name] = $value;
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}
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}
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if (!$matches['opening_brace'] && isset($matches['closing_brace'])) {
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$value .= '}';
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}
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return $matches['backslashes'].$value;
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}, $value);
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return $value;
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}
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private function moveCursor(string $text)
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{
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$this->cursor += \strlen($text);
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$this->lineno += substr_count($text, "\n");
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}
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private function createFormatException(string $message): FormatException
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{
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return new FormatException($message, new FormatExceptionContext($this->data, $this->path, $this->lineno, $this->cursor));
|
|
}
|
|
|
|
private function doLoad(bool $overrideExistingVars, array $paths): void
|
|
{
|
|
foreach ($paths as $path) {
|
|
if (!is_readable($path) || is_dir($path)) {
|
|
throw new PathException($path);
|
|
}
|
|
|
|
$this->populate($this->parse(file_get_contents($path), $path), $overrideExistingVars);
|
|
}
|
|
}
|
|
}
|