%PDF-
%PDF-
Mini Shell
Mini Shell
<?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\Dotenv;
use Symfony\Component\Dotenv\Exception\FormatException;
use Symfony\Component\Dotenv\Exception\FormatExceptionContext;
use Symfony\Component\Dotenv\Exception\PathException;
use Symfony\Component\Process\Exception\ExceptionInterface as ProcessException;
use Symfony\Component\Process\Process;
/**
* Manages .env files.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
final class Dotenv
{
const VARNAME_REGEX = '(?i:[A-Z][A-Z0-9_]*+)';
const STATE_VARNAME = 0;
const STATE_VALUE = 1;
private $path;
private $cursor;
private $lineno;
private $data;
private $end;
private $values;
/**
* Loads one or several .env files.
*
* @param string $path A file to load
*
* @throws FormatException when a file has a syntax error
* @throws PathException when a file does not exist or is not readable
*/
public function load($path/*, ...$paths*/)
{
// func_get_args() to be replaced by a variadic argument for Symfony 4.0
foreach (\func_get_args() as $path) {
if (!is_readable($path) || is_dir($path)) {
throw new PathException($path);
}
$this->populate($this->parse(file_get_contents($path), $path));
}
}
/**
* Sets values as environment variables (via putenv, $_ENV, and $_SERVER).
*
* Note that existing environment variables are not overridden.
*
* @param array $values An array of env variables
*/
public function populate($values)
{
$updateLoadedVars = false;
$loadedVars = array_flip(explode(',', isset($_SERVER['SYMFONY_DOTENV_VARS']) ? $_SERVER['SYMFONY_DOTENV_VARS'] : (isset($_ENV['SYMFONY_DOTENV_VARS']) ? $_ENV['SYMFONY_DOTENV_VARS'] : '')));
foreach ($values as $name => $value) {
$notHttpName = 0 !== strpos($name, 'HTTP_');
// don't check existence with getenv() because of thread safety issues
if (!isset($loadedVars[$name]) && (isset($_ENV[$name]) || (isset($_SERVER[$name]) && $notHttpName))) {
continue;
}
putenv("$name=$value");
$_ENV[$name] = $value;
if ($notHttpName) {
$_SERVER[$name] = $value;
}
if (!isset($loadedVars[$name])) {
$loadedVars[$name] = $updateLoadedVars = true;
}
}
if ($updateLoadedVars) {
unset($loadedVars['']);
$loadedVars = implode(',', array_keys($loadedVars));
putenv('SYMFONY_DOTENV_VARS='.$_ENV['SYMFONY_DOTENV_VARS'] = $_SERVER['SYMFONY_DOTENV_VARS'] = $loadedVars);
}
}
/**
* Parses the contents of an .env file.
*
* @param string $data The data to be parsed
* @param string $path The original file name where data where stored (used for more meaningful error messages)
*
* @return array An array of env variables
*
* @throws FormatException when a file has a syntax error
*/
public function parse($data, $path = '.env')
{
$this->path = $path;
$this->data = str_replace(["\r\n", "\r"], "\n", $data);
$this->lineno = 1;
$this->cursor = 0;
$this->end = \strlen($this->data);
$state = self::STATE_VARNAME;
$this->values = [];
$name = '';
$this->skipEmptyLines();
while ($this->cursor < $this->end) {
switch ($state) {
case self::STATE_VARNAME:
$name = $this->lexVarname();
$state = self::STATE_VALUE;
break;
case self::STATE_VALUE:
$this->values[$name] = $this->lexValue();
$state = self::STATE_VARNAME;
break;
}
}
if (self::STATE_VALUE === $state) {
$this->values[$name] = '';
}
try {
return $this->values;
} finally {
$this->values = [];
$this->data = null;
$this->path = null;
}
}
private function lexVarname()
{
// var name + optional export
if (!preg_match('/(export[ \t]++)?('.self::VARNAME_REGEX.')/A', $this->data, $matches, 0, $this->cursor)) {
throw $this->createFormatException('Invalid character in variable name');
}
$this->moveCursor($matches[0]);
if ($this->cursor === $this->end || "\n" === $this->data[$this->cursor] || '#' === $this->data[$this->cursor]) {
if ($matches[1]) {
throw $this->createFormatException('Unable to unset an environment variable');
}
throw $this->createFormatException('Missing = in the environment variable declaration');
}
if (' ' === $this->data[$this->cursor] || "\t" === $this->data[$this->cursor]) {
throw $this->createFormatException('Whitespace characters are not supported after the variable name');
}
if ('=' !== $this->data[$this->cursor]) {
throw $this->createFormatException('Missing = in the environment variable declaration');
}
++$this->cursor;
return $matches[2];
}
private function lexValue()
{
if (preg_match('/[ \t]*+(?:#.*)?$/Am', $this->data, $matches, 0, $this->cursor)) {
$this->moveCursor($matches[0]);
$this->skipEmptyLines();
return '';
}
if (' ' === $this->data[$this->cursor] || "\t" === $this->data[$this->cursor]) {
throw $this->createFormatException('Whitespace are not supported before the value');
}
$loadedVars = array_flip(explode(',', isset($_SERVER['SYMFONY_DOTENV_VARS']) ? $_SERVER['SYMFONY_DOTENV_VARS'] : (isset($_ENV['SYMFONY_DOTENV_VARS']) ? $_ENV['SYMFONY_DOTENV_VARS'] : '')));
unset($loadedVars['']);
$v = '';
do {
if ("'" === $this->data[$this->cursor]) {
$len = 0;
do {
if ($this->cursor + ++$len === $this->end) {
$this->cursor += $len;
throw $this->createFormatException('Missing quote to end the value');
}
} while ("'" !== $this->data[$this->cursor + $len]);
$v .= substr($this->data, 1 + $this->cursor, $len - 1);
$this->cursor += 1 + $len;
} elseif ('"' === $this->data[$this->cursor]) {
$value = '';
if (++$this->cursor === $this->end) {
throw $this->createFormatException('Missing quote to end the value');
}
while ('"' !== $this->data[$this->cursor] || ('\\' === $this->data[$this->cursor - 1] && '\\' !== $this->data[$this->cursor - 2])) {
$value .= $this->data[$this->cursor];
++$this->cursor;
if ($this->cursor === $this->end) {
throw $this->createFormatException('Missing quote to end the value');
}
}
if ("\n" === $this->data[$this->cursor]) {
throw $this->createFormatException('Missing quote to end the value');
}
++$this->cursor;
$value = str_replace(['\\"', '\r', '\n'], ['"', "\r", "\n"], $value);
$resolvedValue = $value;
$resolvedValue = $this->resolveVariables($resolvedValue, $loadedVars);
$resolvedValue = $this->resolveCommands($resolvedValue, $loadedVars);
$resolvedValue = str_replace('\\\\', '\\', $resolvedValue);
$v .= $resolvedValue;
} else {
$value = '';
$prevChr = $this->data[$this->cursor - 1];
while ($this->cursor < $this->end && !\in_array($this->data[$this->cursor], ["\n", '"', "'"], true) && !((' ' === $prevChr || "\t" === $prevChr) && '#' === $this->data[$this->cursor])) {
if ('\\' === $this->data[$this->cursor] && isset($this->data[$this->cursor + 1]) && ('"' === $this->data[$this->cursor + 1] || "'" === $this->data[$this->cursor + 1])) {
++$this->cursor;
}
$value .= $prevChr = $this->data[$this->cursor];
if ('$' === $this->data[$this->cursor] && isset($this->data[$this->cursor + 1]) && '(' === $this->data[$this->cursor + 1]) {
++$this->cursor;
$value .= '('.$this->lexNestedExpression().')';
}
++$this->cursor;
}
$value = rtrim($value);
$resolvedValue = $value;
$resolvedValue = $this->resolveVariables($resolvedValue, $loadedVars);
$resolvedValue = $this->resolveCommands($resolvedValue, $loadedVars);
$resolvedValue = str_replace('\\\\', '\\', $resolvedValue);
if ($resolvedValue === $value && preg_match('/\s+/', $value)) {
throw $this->createFormatException('A value containing spaces must be surrounded by quotes');
}
$v .= $resolvedValue;
if ($this->cursor < $this->end && '#' === $this->data[$this->cursor]) {
break;
}
}
} while ($this->cursor < $this->end && "\n" !== $this->data[$this->cursor]);
$this->skipEmptyLines();
return $v;
}
private function lexNestedExpression()
{
++$this->cursor;
$value = '';
while ("\n" !== $this->data[$this->cursor] && ')' !== $this->data[$this->cursor]) {
$value .= $this->data[$this->cursor];
if ('(' === $this->data[$this->cursor]) {
$value .= $this->lexNestedExpression().')';
}
++$this->cursor;
if ($this->cursor === $this->end) {
throw $this->createFormatException('Missing closing parenthesis.');
}
}
if ("\n" === $this->data[$this->cursor]) {
throw $this->createFormatException('Missing closing parenthesis.');
}
return $value;
}
private function skipEmptyLines()
{
if (preg_match('/(?:\s*+(?:#[^\n]*+)?+)++/A', $this->data, $match, 0, $this->cursor)) {
$this->moveCursor($match[0]);
}
}
private function resolveCommands($value, $loadedVars)
{
if (false === strpos($value, '$')) {
return $value;
}
$regex = '/
(\\\\)? # escaped with a backslash?
\$
(?<cmd>
\( # require opening parenthesis
([^()]|\g<cmd>)+ # allow any number of non-parens, or balanced parens (by nesting the <cmd> expression recursively)
\) # require closing paren
)
/x';
return preg_replace_callback($regex, function ($matches) use ($loadedVars) {
if ('\\' === $matches[1]) {
return substr($matches[0], 1);
}
if ('\\' === \DIRECTORY_SEPARATOR) {
throw new \LogicException('Resolving commands is not supported on Windows.');
}
if (!class_exists(Process::class)) {
throw new \LogicException('Resolving commands requires the Symfony Process component.');
}
$process = new Process('echo '.$matches[0]);
$process->inheritEnvironmentVariables(true);
$env = [];
foreach ($this->values as $name => $value) {
if (isset($loadedVars[$name]) || (!isset($_ENV[$name]) && !(isset($_SERVER[$name]) && 0 !== strpos($name, 'HTTP_')))) {
$env[$name] = $value;
}
}
$process->setEnv($env);
try {
$process->mustRun();
} catch (ProcessException $e) {
throw $this->createFormatException(sprintf('Issue expanding a command (%s)', $process->getErrorOutput()));
}
return preg_replace('/[\r\n]+$/', '', $process->getOutput());
}, $value);
}
private function resolveVariables($value, array $loadedVars)
{
if (false === strpos($value, '$')) {
return $value;
}
$regex = '/
(?<!\\\\)
(?P<backslashes>\\\\*) # escaped with a backslash?
\$
(?!\() # no opening parenthesis
(?P<opening_brace>\{)? # optional brace
(?P<name>'.self::VARNAME_REGEX.')? # var name
(?P<closing_brace>\})? # optional closing brace
/x';
$value = preg_replace_callback($regex, function ($matches) use ($loadedVars) {
// odd number of backslashes means the $ character is escaped
if (1 === \strlen($matches['backslashes']) % 2) {
return substr($matches[0], 1);
}
// unescaped $ not followed by variable name
if (!isset($matches['name'])) {
return $matches[0];
}
if ('{' === $matches['opening_brace'] && !isset($matches['closing_brace'])) {
throw $this->createFormatException('Unclosed braces on variable expansion');
}
$name = $matches['name'];
if (isset($loadedVars[$name]) && isset($this->values[$name])) {
$value = $this->values[$name];
} elseif (isset($_ENV[$name])) {
$value = $_ENV[$name];
} elseif (isset($_SERVER[$name]) && 0 !== strpos($name, 'HTTP_')) {
$value = $_SERVER[$name];
} elseif (isset($this->values[$name])) {
$value = $this->values[$name];
} else {
$value = (string) getenv($name);
}
if (!$matches['opening_brace'] && isset($matches['closing_brace'])) {
$value .= '}';
}
return $matches['backslashes'].$value;
}, $value);
return $value;
}
private function moveCursor($text)
{
$this->cursor += \strlen($text);
$this->lineno += substr_count($text, "\n");
}
private function createFormatException($message)
{
return new FormatException($message, new FormatExceptionContext($this->data, $this->path, $this->lineno, $this->cursor));
}
}
Zerion Mini Shell 1.0