dependencies-upgrade
This commit is contained in:
59
vendor/vlucas/phpdotenv/src/Parser/Entry.php
vendored
Normal file
59
vendor/vlucas/phpdotenv/src/Parser/Entry.php
vendored
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@@ -0,0 +1,59 @@
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<?php
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declare(strict_types=1);
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namespace Dotenv\Parser;
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use PhpOption\Option;
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final class Entry
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{
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/**
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* The entry name.
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*
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* @var string
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*/
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private $name;
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/**
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* The entry value.
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*
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* @var \Dotenv\Parser\Value|null
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*/
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private $value;
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/**
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* Create a new entry instance.
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*
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* @param string $name
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* @param \Dotenv\Parser\Value|null $value
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*
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* @return void
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*/
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public function __construct(string $name, Value $value = null)
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{
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$this->name = $name;
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$this->value = $value;
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}
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/**
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* Get the entry name.
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*
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* @return string
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*/
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public function getName()
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{
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return $this->name;
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}
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/**
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* Get the entry value.
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*
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* @return \PhpOption\Option<\Dotenv\Parser\Value>
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*/
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public function getValue()
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{
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/** @var \PhpOption\Option<\Dotenv\Parser\Value> */
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return Option::fromValue($this->value);
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}
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}
|
300
vendor/vlucas/phpdotenv/src/Parser/EntryParser.php
vendored
Normal file
300
vendor/vlucas/phpdotenv/src/Parser/EntryParser.php
vendored
Normal file
@@ -0,0 +1,300 @@
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<?php
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declare(strict_types=1);
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namespace Dotenv\Parser;
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use Dotenv\Util\Regex;
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use Dotenv\Util\Str;
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use GrahamCampbell\ResultType\Error;
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use GrahamCampbell\ResultType\Result;
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use GrahamCampbell\ResultType\Success;
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final class EntryParser
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{
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private const INITIAL_STATE = 0;
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private const UNQUOTED_STATE = 1;
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private const SINGLE_QUOTED_STATE = 2;
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private const DOUBLE_QUOTED_STATE = 3;
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private const ESCAPE_SEQUENCE_STATE = 4;
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private const WHITESPACE_STATE = 5;
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private const COMMENT_STATE = 6;
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private const REJECT_STATES = [self::SINGLE_QUOTED_STATE, self::DOUBLE_QUOTED_STATE, self::ESCAPE_SEQUENCE_STATE];
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/**
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* This class is a singleton.
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*
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* @codeCoverageIgnore
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*
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* @return void
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*/
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private function __construct()
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{
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//
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}
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/**
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* Parse a raw entry into a proper entry.
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*
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* That is, turn a raw environment variable entry into a name and possibly
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* a value. We wrap the answer in a result type.
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*
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* @param string $entry
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*
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* @return \GrahamCampbell\ResultType\Result<\Dotenv\Parser\Entry,string>
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*/
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public static function parse(string $entry)
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{
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return self::splitStringIntoParts($entry)->flatMap(static function (array $parts) {
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[$name, $value] = $parts;
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return self::parseName($name)->flatMap(static function (string $name) use ($value) {
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/** @var Result<Value|null,string> */
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$parsedValue = $value === null ? Success::create(null) : self::parseValue($value);
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return $parsedValue->map(static function (?Value $value) use ($name) {
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return new Entry($name, $value);
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});
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});
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});
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}
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/**
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* Split the compound string into parts.
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*
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* @param string $line
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*
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* @return \GrahamCampbell\ResultType\Result<array{string,string|null},string>
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*/
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private static function splitStringIntoParts(string $line)
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{
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/** @var array{string,string|null} */
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$result = Str::pos($line, '=')->map(static function () use ($line) {
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return \array_map('trim', \explode('=', $line, 2));
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})->getOrElse([$line, null]);
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if ($result[0] === '') {
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/** @var \GrahamCampbell\ResultType\Result<array{string,string|null},string> */
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return Error::create(self::getErrorMessage('an unexpected equals', $line));
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}
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/** @var \GrahamCampbell\ResultType\Result<array{string,string|null},string> */
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return Success::create($result);
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}
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/**
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* Parse the given variable name.
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*
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* That is, strip the optional quotes and leading "export" from the
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* variable name. We wrap the answer in a result type.
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*
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* @param string $name
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*
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* @return \GrahamCampbell\ResultType\Result<string,string>
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*/
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private static function parseName(string $name)
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{
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if (Str::len($name) > 8 && Str::substr($name, 0, 6) === 'export' && \ctype_space(Str::substr($name, 6, 1))) {
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$name = \ltrim(Str::substr($name, 6));
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}
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if (self::isQuotedName($name)) {
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$name = Str::substr($name, 1, -1);
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}
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if (!self::isValidName($name)) {
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/** @var \GrahamCampbell\ResultType\Result<string,string> */
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return Error::create(self::getErrorMessage('an invalid name', $name));
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}
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/** @var \GrahamCampbell\ResultType\Result<string,string> */
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return Success::create($name);
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}
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/**
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* Is the given variable name quoted?
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*
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* @param string $name
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*
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* @return bool
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*/
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private static function isQuotedName(string $name)
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{
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if (Str::len($name) < 3) {
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return false;
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}
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$first = Str::substr($name, 0, 1);
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$last = Str::substr($name, -1, 1);
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return ($first === '"' && $last === '"') || ($first === '\'' && $last === '\'');
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}
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/**
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* Is the given variable name valid?
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*
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* @param string $name
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*
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* @return bool
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*/
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private static function isValidName(string $name)
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{
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return Regex::matches('~(*UTF8)\A[\p{Ll}\p{Lu}\p{M}\p{N}_.]+\z~', $name)->success()->getOrElse(false);
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}
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/**
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* Parse the given variable value.
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*
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* This has the effect of stripping quotes and comments, dealing with
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* special characters, and locating nested variables, but not resolving
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* them. Formally, we run a finite state automaton with an output tape: a
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* transducer. We wrap the answer in a result type.
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||||
*
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* @param string $value
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*
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* @return \GrahamCampbell\ResultType\Result<\Dotenv\Parser\Value,string>
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*/
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private static function parseValue(string $value)
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{
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if (\trim($value) === '') {
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/** @var \GrahamCampbell\ResultType\Result<\Dotenv\Parser\Value,string> */
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return Success::create(Value::blank());
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}
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return \array_reduce(\iterator_to_array(Lexer::lex($value)), static function (Result $data, string $token) {
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return $data->flatMap(static function (array $data) use ($token) {
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return self::processToken($data[1], $token)->map(static function (array $val) use ($data) {
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return [$data[0]->append($val[0], $val[1]), $val[2]];
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});
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});
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}, Success::create([Value::blank(), self::INITIAL_STATE]))->flatMap(static function (array $result) {
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/** @psalm-suppress DocblockTypeContradiction */
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if (in_array($result[1], self::REJECT_STATES, true)) {
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/** @var \GrahamCampbell\ResultType\Result<\Dotenv\Parser\Value,string> */
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return Error::create('a missing closing quote');
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}
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/** @var \GrahamCampbell\ResultType\Result<\Dotenv\Parser\Value,string> */
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return Success::create($result[0]);
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})->mapError(static function (string $err) use ($value) {
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return self::getErrorMessage($err, $value);
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});
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}
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/**
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* Process the given token.
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||||
*
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* @param int $state
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* @param string $token
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||||
*
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* @return \GrahamCampbell\ResultType\Result<array{string,bool,int},string>
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*/
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private static function processToken(int $state, string $token)
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{
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switch ($state) {
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case self::INITIAL_STATE:
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if ($token === '\'') {
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||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
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return Success::create(['', false, self::SINGLE_QUOTED_STATE]);
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} elseif ($token === '"') {
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/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
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return Success::create(['', false, self::DOUBLE_QUOTED_STATE]);
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} elseif ($token === '#') {
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/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
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return Success::create(['', false, self::COMMENT_STATE]);
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} elseif ($token === '$') {
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/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
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return Success::create([$token, true, self::UNQUOTED_STATE]);
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} else {
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/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
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return Success::create([$token, false, self::UNQUOTED_STATE]);
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||||
}
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case self::UNQUOTED_STATE:
|
||||
if ($token === '#') {
|
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/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
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||||
return Success::create(['', false, self::COMMENT_STATE]);
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||||
} elseif (\ctype_space($token)) {
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||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create(['', false, self::WHITESPACE_STATE]);
|
||||
} elseif ($token === '$') {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create([$token, true, self::UNQUOTED_STATE]);
|
||||
} else {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create([$token, false, self::UNQUOTED_STATE]);
|
||||
}
|
||||
case self::SINGLE_QUOTED_STATE:
|
||||
if ($token === '\'') {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create(['', false, self::WHITESPACE_STATE]);
|
||||
} else {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create([$token, false, self::SINGLE_QUOTED_STATE]);
|
||||
}
|
||||
case self::DOUBLE_QUOTED_STATE:
|
||||
if ($token === '"') {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create(['', false, self::WHITESPACE_STATE]);
|
||||
} elseif ($token === '\\') {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create(['', false, self::ESCAPE_SEQUENCE_STATE]);
|
||||
} elseif ($token === '$') {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create([$token, true, self::DOUBLE_QUOTED_STATE]);
|
||||
} else {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create([$token, false, self::DOUBLE_QUOTED_STATE]);
|
||||
}
|
||||
case self::ESCAPE_SEQUENCE_STATE:
|
||||
if ($token === '"' || $token === '\\') {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create([$token, false, self::DOUBLE_QUOTED_STATE]);
|
||||
} elseif ($token === '$') {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create([$token, false, self::DOUBLE_QUOTED_STATE]);
|
||||
} else {
|
||||
$first = Str::substr($token, 0, 1);
|
||||
if (\in_array($first, ['f', 'n', 'r', 't', 'v'], true)) {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create([\stripcslashes('\\'.$first).Str::substr($token, 1), false, self::DOUBLE_QUOTED_STATE]);
|
||||
} else {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Error::create('an unexpected escape sequence');
|
||||
}
|
||||
}
|
||||
case self::WHITESPACE_STATE:
|
||||
if ($token === '#') {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create(['', false, self::COMMENT_STATE]);
|
||||
} elseif (!\ctype_space($token)) {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Error::create('unexpected whitespace');
|
||||
} else {
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create(['', false, self::WHITESPACE_STATE]);
|
||||
}
|
||||
case self::COMMENT_STATE:
|
||||
/** @var \GrahamCampbell\ResultType\Result<array{string,bool,int},string> */
|
||||
return Success::create(['', false, self::COMMENT_STATE]);
|
||||
default:
|
||||
throw new \Error('Parser entered invalid state.');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Generate a friendly error message.
|
||||
*
|
||||
* @param string $cause
|
||||
* @param string $subject
|
||||
*
|
||||
* @return string
|
||||
*/
|
||||
private static function getErrorMessage(string $cause, string $subject)
|
||||
{
|
||||
return \sprintf(
|
||||
'Encountered %s at [%s].',
|
||||
$cause,
|
||||
\strtok($subject, "\n")
|
||||
);
|
||||
}
|
||||
}
|
58
vendor/vlucas/phpdotenv/src/Parser/Lexer.php
vendored
Normal file
58
vendor/vlucas/phpdotenv/src/Parser/Lexer.php
vendored
Normal file
@@ -0,0 +1,58 @@
|
||||
<?php
|
||||
|
||||
declare(strict_types=1);
|
||||
|
||||
namespace Dotenv\Parser;
|
||||
|
||||
final class Lexer
|
||||
{
|
||||
/**
|
||||
* The regex for each type of token.
|
||||
*/
|
||||
private const PATTERNS = [
|
||||
'[\r\n]{1,1000}', '[^\S\r\n]{1,1000}', '\\\\', '\'', '"', '\\#', '\\$', '([^(\s\\\\\'"\\#\\$)]|\\(|\\)){1,1000}',
|
||||
];
|
||||
|
||||
/**
|
||||
* This class is a singleton.
|
||||
*
|
||||
* @codeCoverageIgnore
|
||||
*
|
||||
* @return void
|
||||
*/
|
||||
private function __construct()
|
||||
{
|
||||
//
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert content into a token stream.
|
||||
*
|
||||
* Multibyte string processing is not needed here, and nether is error
|
||||
* handling, for performance reasons.
|
||||
*
|
||||
* @param string $content
|
||||
*
|
||||
* @return \Generator<string>
|
||||
*/
|
||||
public static function lex(string $content)
|
||||
{
|
||||
static $regex;
|
||||
|
||||
if ($regex === null) {
|
||||
$regex = '(('.\implode(')|(', self::PATTERNS).'))A';
|
||||
}
|
||||
|
||||
$offset = 0;
|
||||
|
||||
while (isset($content[$offset])) {
|
||||
if (!\preg_match($regex, $content, $matches, 0, $offset)) {
|
||||
throw new \Error(\sprintf('Lexer encountered unexpected character [%s].', $content[$offset]));
|
||||
}
|
||||
|
||||
$offset += \strlen($matches[0]);
|
||||
|
||||
yield $matches[0];
|
||||
}
|
||||
}
|
||||
}
|
127
vendor/vlucas/phpdotenv/src/Parser/Lines.php
vendored
Normal file
127
vendor/vlucas/phpdotenv/src/Parser/Lines.php
vendored
Normal file
@@ -0,0 +1,127 @@
|
||||
<?php
|
||||
|
||||
declare(strict_types=1);
|
||||
|
||||
namespace Dotenv\Parser;
|
||||
|
||||
use Dotenv\Util\Regex;
|
||||
use Dotenv\Util\Str;
|
||||
|
||||
final class Lines
|
||||
{
|
||||
/**
|
||||
* This class is a singleton.
|
||||
*
|
||||
* @codeCoverageIgnore
|
||||
*
|
||||
* @return void
|
||||
*/
|
||||
private function __construct()
|
||||
{
|
||||
//
|
||||
}
|
||||
|
||||
/**
|
||||
* Process the array of lines of environment variables.
|
||||
*
|
||||
* This will produce an array of raw entries, one per variable.
|
||||
*
|
||||
* @param string[] $lines
|
||||
*
|
||||
* @return string[]
|
||||
*/
|
||||
public static function process(array $lines)
|
||||
{
|
||||
$output = [];
|
||||
$multiline = false;
|
||||
$multilineBuffer = [];
|
||||
|
||||
foreach ($lines as $line) {
|
||||
[$multiline, $line, $multilineBuffer] = self::multilineProcess($multiline, $line, $multilineBuffer);
|
||||
|
||||
if (!$multiline && !self::isCommentOrWhitespace($line)) {
|
||||
$output[] = $line;
|
||||
}
|
||||
}
|
||||
|
||||
return $output;
|
||||
}
|
||||
|
||||
/**
|
||||
* Used to make all multiline variable process.
|
||||
*
|
||||
* @param bool $multiline
|
||||
* @param string $line
|
||||
* @param string[] $buffer
|
||||
*
|
||||
* @return array{bool,string,string[]}
|
||||
*/
|
||||
private static function multilineProcess(bool $multiline, string $line, array $buffer)
|
||||
{
|
||||
$startsOnCurrentLine = $multiline ? false : self::looksLikeMultilineStart($line);
|
||||
|
||||
// check if $line can be multiline variable
|
||||
if ($startsOnCurrentLine) {
|
||||
$multiline = true;
|
||||
}
|
||||
|
||||
if ($multiline) {
|
||||
\array_push($buffer, $line);
|
||||
|
||||
if (self::looksLikeMultilineStop($line, $startsOnCurrentLine)) {
|
||||
$multiline = false;
|
||||
$line = \implode("\n", $buffer);
|
||||
$buffer = [];
|
||||
}
|
||||
}
|
||||
|
||||
return [$multiline, $line, $buffer];
|
||||
}
|
||||
|
||||
/**
|
||||
* Determine if the given line can be the start of a multiline variable.
|
||||
*
|
||||
* @param string $line
|
||||
*
|
||||
* @return bool
|
||||
*/
|
||||
private static function looksLikeMultilineStart(string $line)
|
||||
{
|
||||
return Str::pos($line, '="')->map(static function () use ($line) {
|
||||
return self::looksLikeMultilineStop($line, true) === false;
|
||||
})->getOrElse(false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Determine if the given line can be the start of a multiline variable.
|
||||
*
|
||||
* @param string $line
|
||||
* @param bool $started
|
||||
*
|
||||
* @return bool
|
||||
*/
|
||||
private static function looksLikeMultilineStop(string $line, bool $started)
|
||||
{
|
||||
if ($line === '"') {
|
||||
return true;
|
||||
}
|
||||
|
||||
return Regex::occurrences('/(?=([^\\\\]"))/', \str_replace('\\\\', '', $line))->map(static function (int $count) use ($started) {
|
||||
return $started ? $count > 1 : $count >= 1;
|
||||
})->success()->getOrElse(false);
|
||||
}
|
||||
|
||||
/**
|
||||
* Determine if the line in the file is a comment or whitespace.
|
||||
*
|
||||
* @param string $line
|
||||
*
|
||||
* @return bool
|
||||
*/
|
||||
private static function isCommentOrWhitespace(string $line)
|
||||
{
|
||||
$line = \trim($line);
|
||||
|
||||
return $line === '' || (isset($line[0]) && $line[0] === '#');
|
||||
}
|
||||
}
|
53
vendor/vlucas/phpdotenv/src/Parser/Parser.php
vendored
Normal file
53
vendor/vlucas/phpdotenv/src/Parser/Parser.php
vendored
Normal file
@@ -0,0 +1,53 @@
|
||||
<?php
|
||||
|
||||
declare(strict_types=1);
|
||||
|
||||
namespace Dotenv\Parser;
|
||||
|
||||
use Dotenv\Exception\InvalidFileException;
|
||||
use Dotenv\Util\Regex;
|
||||
use GrahamCampbell\ResultType\Result;
|
||||
use GrahamCampbell\ResultType\Success;
|
||||
|
||||
final class Parser implements ParserInterface
|
||||
{
|
||||
/**
|
||||
* Parse content into an entry array.
|
||||
*
|
||||
* @param string $content
|
||||
*
|
||||
* @throws \Dotenv\Exception\InvalidFileException
|
||||
*
|
||||
* @return \Dotenv\Parser\Entry[]
|
||||
*/
|
||||
public function parse(string $content)
|
||||
{
|
||||
return Regex::split("/(\r\n|\n|\r)/", $content)->mapError(static function () {
|
||||
return 'Could not split into separate lines.';
|
||||
})->flatMap(static function (array $lines) {
|
||||
return self::process(Lines::process($lines));
|
||||
})->mapError(static function (string $error) {
|
||||
throw new InvalidFileException(\sprintf('Failed to parse dotenv file. %s', $error));
|
||||
})->success()->get();
|
||||
}
|
||||
|
||||
/**
|
||||
* Convert the raw entries into proper entries.
|
||||
*
|
||||
* @param string[] $entries
|
||||
*
|
||||
* @return \GrahamCampbell\ResultType\Result<\Dotenv\Parser\Entry[],string>
|
||||
*/
|
||||
private static function process(array $entries)
|
||||
{
|
||||
/** @var \GrahamCampbell\ResultType\Result<\Dotenv\Parser\Entry[],string> */
|
||||
return \array_reduce($entries, static function (Result $result, string $raw) {
|
||||
return $result->flatMap(static function (array $entries) use ($raw) {
|
||||
return EntryParser::parse($raw)->map(static function (Entry $entry) use ($entries) {
|
||||
/** @var \Dotenv\Parser\Entry[] */
|
||||
return \array_merge($entries, [$entry]);
|
||||
});
|
||||
});
|
||||
}, Success::create([]));
|
||||
}
|
||||
}
|
19
vendor/vlucas/phpdotenv/src/Parser/ParserInterface.php
vendored
Normal file
19
vendor/vlucas/phpdotenv/src/Parser/ParserInterface.php
vendored
Normal file
@@ -0,0 +1,19 @@
|
||||
<?php
|
||||
|
||||
declare(strict_types=1);
|
||||
|
||||
namespace Dotenv\Parser;
|
||||
|
||||
interface ParserInterface
|
||||
{
|
||||
/**
|
||||
* Parse content into an entry array.
|
||||
*
|
||||
* @param string $content
|
||||
*
|
||||
* @throws \Dotenv\Exception\InvalidFileException
|
||||
*
|
||||
* @return \Dotenv\Parser\Entry[]
|
||||
*/
|
||||
public function parse(string $content);
|
||||
}
|
88
vendor/vlucas/phpdotenv/src/Parser/Value.php
vendored
Normal file
88
vendor/vlucas/phpdotenv/src/Parser/Value.php
vendored
Normal file
@@ -0,0 +1,88 @@
|
||||
<?php
|
||||
|
||||
declare(strict_types=1);
|
||||
|
||||
namespace Dotenv\Parser;
|
||||
|
||||
use Dotenv\Util\Str;
|
||||
|
||||
final class Value
|
||||
{
|
||||
/**
|
||||
* The string representation of the parsed value.
|
||||
*
|
||||
* @var string
|
||||
*/
|
||||
private $chars;
|
||||
|
||||
/**
|
||||
* The locations of the variables in the value.
|
||||
*
|
||||
* @var int[]
|
||||
*/
|
||||
private $vars;
|
||||
|
||||
/**
|
||||
* Internal constructor for a value.
|
||||
*
|
||||
* @param string $chars
|
||||
* @param int[] $vars
|
||||
*
|
||||
* @return void
|
||||
*/
|
||||
private function __construct(string $chars, array $vars)
|
||||
{
|
||||
$this->chars = $chars;
|
||||
$this->vars = $vars;
|
||||
}
|
||||
|
||||
/**
|
||||
* Create an empty value instance.
|
||||
*
|
||||
* @return \Dotenv\Parser\Value
|
||||
*/
|
||||
public static function blank()
|
||||
{
|
||||
return new self('', []);
|
||||
}
|
||||
|
||||
/**
|
||||
* Create a new value instance, appending the characters.
|
||||
*
|
||||
* @param string $chars
|
||||
* @param bool $var
|
||||
*
|
||||
* @return \Dotenv\Parser\Value
|
||||
*/
|
||||
public function append(string $chars, bool $var)
|
||||
{
|
||||
return new self(
|
||||
$this->chars.$chars,
|
||||
$var ? \array_merge($this->vars, [Str::len($this->chars)]) : $this->vars
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the string representation of the parsed value.
|
||||
*
|
||||
* @return string
|
||||
*/
|
||||
public function getChars()
|
||||
{
|
||||
return $this->chars;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get the locations of the variables in the value.
|
||||
*
|
||||
* @return int[]
|
||||
*/
|
||||
public function getVars()
|
||||
{
|
||||
$vars = $this->vars;
|
||||
|
||||
\rsort($vars);
|
||||
|
||||
return $vars;
|
||||
}
|
||||
}
|
Reference in New Issue
Block a user