1247 lines
49 KiB
PHP
1247 lines
49 KiB
PHP
<?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\Yaml;
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use Symfony\Component\Yaml\Exception\ParseException;
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use Symfony\Component\Yaml\Tag\TaggedValue;
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/**
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* Parser parses YAML strings to convert them to PHP arrays.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*
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* @final
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*/
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class Parser
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{
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public const TAG_PATTERN = '(?P<tag>![\w!.\/:-]+)';
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public const BLOCK_SCALAR_HEADER_PATTERN = '(?P<separator>\||>)(?P<modifiers>\+|\-|\d+|\+\d+|\-\d+|\d+\+|\d+\-)?(?P<comments> +#.*)?';
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public const REFERENCE_PATTERN = '#^&(?P<ref>[^ ]++) *+(?P<value>.*)#u';
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private ?string $filename = null;
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private int $offset = 0;
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private int $numberOfParsedLines = 0;
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private ?int $totalNumberOfLines = null;
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private array $lines = [];
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private int $currentLineNb = -1;
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private string $currentLine = '';
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private array $refs = [];
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private array $skippedLineNumbers = [];
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private array $locallySkippedLineNumbers = [];
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private array $refsBeingParsed = [];
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/**
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* Parses a YAML file into a PHP value.
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*
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* @param string $filename The path to the YAML file to be parsed
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* @param int $flags A bit field of Yaml::PARSE_* constants to customize the YAML parser behavior
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*
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* @throws ParseException If the file could not be read or the YAML is not valid
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*/
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public function parseFile(string $filename, int $flags = 0): mixed
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{
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if (!is_file($filename)) {
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throw new ParseException(sprintf('File "%s" does not exist.', $filename));
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}
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if (!is_readable($filename)) {
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throw new ParseException(sprintf('File "%s" cannot be read.', $filename));
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}
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$this->filename = $filename;
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try {
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return $this->parse(file_get_contents($filename), $flags);
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} finally {
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$this->filename = null;
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}
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}
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/**
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* Parses a YAML string to a PHP value.
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*
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* @param string $value A YAML string
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* @param int $flags A bit field of Yaml::PARSE_* constants to customize the YAML parser behavior
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*
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* @throws ParseException If the YAML is not valid
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*/
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public function parse(string $value, int $flags = 0): mixed
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{
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if (false === preg_match('//u', $value)) {
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throw new ParseException('The YAML value does not appear to be valid UTF-8.', -1, null, $this->filename);
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}
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$this->refs = [];
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try {
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$data = $this->doParse($value, $flags);
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} finally {
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$this->refsBeingParsed = [];
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$this->offset = 0;
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$this->lines = [];
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$this->currentLine = '';
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$this->numberOfParsedLines = 0;
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$this->refs = [];
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$this->skippedLineNumbers = [];
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$this->locallySkippedLineNumbers = [];
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$this->totalNumberOfLines = null;
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}
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return $data;
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}
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private function doParse(string $value, int $flags)
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{
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$this->currentLineNb = -1;
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$this->currentLine = '';
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$value = $this->cleanup($value);
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$this->lines = explode("\n", $value);
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$this->numberOfParsedLines = \count($this->lines);
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$this->locallySkippedLineNumbers = [];
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$this->totalNumberOfLines ??= $this->numberOfParsedLines;
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if (!$this->moveToNextLine()) {
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return null;
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}
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$data = [];
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$context = null;
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$allowOverwrite = false;
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while ($this->isCurrentLineEmpty()) {
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if (!$this->moveToNextLine()) {
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return null;
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}
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}
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// Resolves the tag and returns if end of the document
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if (null !== ($tag = $this->getLineTag($this->currentLine, $flags, false)) && !$this->moveToNextLine()) {
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return new TaggedValue($tag, '');
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}
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do {
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if ($this->isCurrentLineEmpty()) {
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continue;
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}
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// tab?
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if ("\t" === $this->currentLine[0]) {
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throw new ParseException('A YAML file cannot contain tabs as indentation.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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Inline::initialize($flags, $this->getRealCurrentLineNb(), $this->filename);
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$isRef = $mergeNode = false;
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if ('-' === $this->currentLine[0] && self::preg_match('#^\-((?P<leadspaces>\s+)(?P<value>.+))?$#u', rtrim($this->currentLine), $values)) {
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if ($context && 'mapping' == $context) {
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throw new ParseException('You cannot define a sequence item when in a mapping.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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$context = 'sequence';
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if (isset($values['value']) && '&' === $values['value'][0] && self::preg_match(self::REFERENCE_PATTERN, $values['value'], $matches)) {
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$isRef = $matches['ref'];
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$this->refsBeingParsed[] = $isRef;
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$values['value'] = $matches['value'];
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}
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if (isset($values['value'][1]) && '?' === $values['value'][0] && ' ' === $values['value'][1]) {
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throw new ParseException('Complex mappings are not supported.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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// array
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if (isset($values['value']) && str_starts_with(ltrim($values['value'], ' '), '-')) {
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// Inline first child
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$currentLineNumber = $this->getRealCurrentLineNb();
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$sequenceIndentation = \strlen($values['leadspaces']) + 1;
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$sequenceYaml = substr($this->currentLine, $sequenceIndentation);
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$sequenceYaml .= "\n".$this->getNextEmbedBlock($sequenceIndentation, true);
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$data[] = $this->parseBlock($currentLineNumber, rtrim($sequenceYaml), $flags);
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} elseif (!isset($values['value']) || '' == trim($values['value'], ' ') || str_starts_with(ltrim($values['value'], ' '), '#')) {
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$data[] = $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(null, true) ?? '', $flags);
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} elseif (null !== $subTag = $this->getLineTag(ltrim($values['value'], ' '), $flags)) {
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$data[] = new TaggedValue(
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$subTag,
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$this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(null, true), $flags)
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);
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} else {
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if (
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isset($values['leadspaces'])
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&& (
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'!' === $values['value'][0]
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|| self::preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\{\[].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $this->trimTag($values['value']), $matches)
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)
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) {
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// this is a compact notation element, add to next block and parse
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$block = $values['value'];
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if ($this->isNextLineIndented()) {
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$block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + \strlen($values['leadspaces']) + 1);
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}
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$data[] = $this->parseBlock($this->getRealCurrentLineNb(), $block, $flags);
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} else {
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$data[] = $this->parseValue($values['value'], $flags, $context);
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}
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}
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if ($isRef) {
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$this->refs[$isRef] = end($data);
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array_pop($this->refsBeingParsed);
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}
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} elseif (
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// @todo in 7.0 remove legacy "(?:!?!php/const:)?"
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self::preg_match('#^(?P<key>(?:![^\s]++\s++)?(?:'.Inline::REGEX_QUOTED_STRING.'|(?:!?!php/const:)?[^ \'"\[\{!].*?)) *\:(( |\t)++(?P<value>.+))?$#u', rtrim($this->currentLine), $values)
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&& (!str_contains($values['key'], ' #') || \in_array($values['key'][0], ['"', "'"]))
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) {
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if (str_starts_with($values['key'], '!php/const:')) {
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trigger_deprecation('symfony/yaml', '6.2', 'YAML syntax for key "%s" is deprecated and replaced by "!php/const %s".', $values['key'], substr($values['key'], 11));
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}
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if ($context && 'sequence' == $context) {
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throw new ParseException('You cannot define a mapping item when in a sequence.', $this->currentLineNb + 1, $this->currentLine, $this->filename);
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}
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$context = 'mapping';
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try {
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$key = Inline::parseScalar($values['key']);
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} catch (ParseException $e) {
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$e->setParsedLine($this->getRealCurrentLineNb() + 1);
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$e->setSnippet($this->currentLine);
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throw $e;
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}
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if (!\is_string($key) && !\is_int($key)) {
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throw new ParseException((is_numeric($key) ? 'Numeric' : 'Non-string').' keys are not supported. Quote your evaluable mapping keys instead.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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// Convert float keys to strings, to avoid being converted to integers by PHP
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if (\is_float($key)) {
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$key = (string) $key;
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}
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if ('<<' === $key && (!isset($values['value']) || '&' !== $values['value'][0] || !self::preg_match('#^&(?P<ref>[^ ]+)#u', $values['value'], $refMatches))) {
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$mergeNode = true;
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$allowOverwrite = true;
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if (isset($values['value'][0]) && '*' === $values['value'][0]) {
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$refName = substr(rtrim($values['value']), 1);
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if (!\array_key_exists($refName, $this->refs)) {
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if (false !== $pos = array_search($refName, $this->refsBeingParsed, true)) {
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throw new ParseException(sprintf('Circular reference [%s] detected for reference "%s".', implode(', ', array_merge(\array_slice($this->refsBeingParsed, $pos), [$refName])), $refName), $this->currentLineNb + 1, $this->currentLine, $this->filename);
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}
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throw new ParseException(sprintf('Reference "%s" does not exist.', $refName), $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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$refValue = $this->refs[$refName];
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if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $refValue instanceof \stdClass) {
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$refValue = (array) $refValue;
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}
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if (!\is_array($refValue)) {
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throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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$data += $refValue; // array union
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} else {
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if (isset($values['value']) && '' !== $values['value']) {
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$value = $values['value'];
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} else {
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$value = $this->getNextEmbedBlock();
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}
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$parsed = $this->parseBlock($this->getRealCurrentLineNb() + 1, $value, $flags);
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if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $parsed instanceof \stdClass) {
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$parsed = (array) $parsed;
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}
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if (!\is_array($parsed)) {
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throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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if (isset($parsed[0])) {
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// If the value associated with the merge key is a sequence, then this sequence is expected to contain mapping nodes
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// and each of these nodes is merged in turn according to its order in the sequence. Keys in mapping nodes earlier
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// in the sequence override keys specified in later mapping nodes.
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foreach ($parsed as $parsedItem) {
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if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $parsedItem instanceof \stdClass) {
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$parsedItem = (array) $parsedItem;
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}
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if (!\is_array($parsedItem)) {
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throw new ParseException('Merge items must be arrays.', $this->getRealCurrentLineNb() + 1, $parsedItem, $this->filename);
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}
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$data += $parsedItem; // array union
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}
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} else {
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// If the value associated with the key is a single mapping node, each of its key/value pairs is inserted into the
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// current mapping, unless the key already exists in it.
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$data += $parsed; // array union
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}
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}
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} elseif ('<<' !== $key && isset($values['value']) && '&' === $values['value'][0] && self::preg_match(self::REFERENCE_PATTERN, $values['value'], $matches)) {
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$isRef = $matches['ref'];
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$this->refsBeingParsed[] = $isRef;
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$values['value'] = $matches['value'];
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}
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$subTag = null;
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if ($mergeNode) {
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// Merge keys
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} elseif (!isset($values['value']) || '' === $values['value'] || str_starts_with($values['value'], '#') || (null !== $subTag = $this->getLineTag($values['value'], $flags)) || '<<' === $key) {
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// hash
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// if next line is less indented or equal, then it means that the current value is null
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if (!$this->isNextLineIndented() && !$this->isNextLineUnIndentedCollection()) {
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// Spec: Keys MUST be unique; first one wins.
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// But overwriting is allowed when a merge node is used in current block.
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if ($allowOverwrite || !isset($data[$key])) {
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if (null !== $subTag) {
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$data[$key] = new TaggedValue($subTag, '');
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} else {
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$data[$key] = null;
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}
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} else {
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throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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} else {
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// remember the parsed line number here in case we need it to provide some contexts in error messages below
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$realCurrentLineNbKey = $this->getRealCurrentLineNb();
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$value = $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(), $flags);
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if ('<<' === $key) {
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$this->refs[$refMatches['ref']] = $value;
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if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $value instanceof \stdClass) {
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$value = (array) $value;
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}
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$data += $value;
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} elseif ($allowOverwrite || !isset($data[$key])) {
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// Spec: Keys MUST be unique; first one wins.
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// But overwriting is allowed when a merge node is used in current block.
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if (null !== $subTag) {
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$data[$key] = new TaggedValue($subTag, $value);
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} else {
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$data[$key] = $value;
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}
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} else {
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throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), $realCurrentLineNbKey + 1, $this->currentLine);
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}
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}
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} else {
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$value = $this->parseValue(rtrim($values['value']), $flags, $context);
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// Spec: Keys MUST be unique; first one wins.
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// But overwriting is allowed when a merge node is used in current block.
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if ($allowOverwrite || !isset($data[$key])) {
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$data[$key] = $value;
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} else {
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throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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}
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if ($isRef) {
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$this->refs[$isRef] = $data[$key];
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array_pop($this->refsBeingParsed);
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}
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} elseif ('"' === $this->currentLine[0] || "'" === $this->currentLine[0]) {
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if (null !== $context) {
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throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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try {
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return Inline::parse($this->lexInlineQuotedString(), $flags, $this->refs);
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} catch (ParseException $e) {
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$e->setParsedLine($this->getRealCurrentLineNb() + 1);
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$e->setSnippet($this->currentLine);
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throw $e;
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}
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} elseif ('{' === $this->currentLine[0]) {
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if (null !== $context) {
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throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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try {
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$parsedMapping = Inline::parse($this->lexInlineMapping(), $flags, $this->refs);
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while ($this->moveToNextLine()) {
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if (!$this->isCurrentLineEmpty()) {
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throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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}
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return $parsedMapping;
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} catch (ParseException $e) {
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$e->setParsedLine($this->getRealCurrentLineNb() + 1);
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$e->setSnippet($this->currentLine);
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throw $e;
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}
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} elseif ('[' === $this->currentLine[0]) {
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if (null !== $context) {
|
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throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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try {
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$parsedSequence = Inline::parse($this->lexInlineSequence(), $flags, $this->refs);
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|
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while ($this->moveToNextLine()) {
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if (!$this->isCurrentLineEmpty()) {
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throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
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}
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}
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return $parsedSequence;
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} catch (ParseException $e) {
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$e->setParsedLine($this->getRealCurrentLineNb() + 1);
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$e->setSnippet($this->currentLine);
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throw $e;
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}
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} else {
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// multiple documents are not supported
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if ('---' === $this->currentLine) {
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throw new ParseException('Multiple documents are not supported.', $this->currentLineNb + 1, $this->currentLine, $this->filename);
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}
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if ($deprecatedUsage = (isset($this->currentLine[1]) && '?' === $this->currentLine[0] && ' ' === $this->currentLine[1])) {
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throw new ParseException('Complex mappings are not supported.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
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}
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|
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// 1-liner optionally followed by newline(s)
|
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if (\is_string($value) && $this->lines[0] === trim($value)) {
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try {
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$value = Inline::parse($this->lines[0], $flags, $this->refs);
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} catch (ParseException $e) {
|
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$e->setParsedLine($this->getRealCurrentLineNb() + 1);
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$e->setSnippet($this->currentLine);
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|
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throw $e;
|
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}
|
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|
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return $value;
|
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}
|
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|
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// try to parse the value as a multi-line string as a last resort
|
|
if (0 === $this->currentLineNb) {
|
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$previousLineWasNewline = false;
|
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$previousLineWasTerminatedWithBackslash = false;
|
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$value = '';
|
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|
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foreach ($this->lines as $line) {
|
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$trimmedLine = trim($line);
|
|
if ('#' === ($trimmedLine[0] ?? '')) {
|
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continue;
|
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}
|
|
// If the indentation is not consistent at offset 0, it is to be considered as a ParseError
|
|
if (0 === $this->offset && !$deprecatedUsage && isset($line[0]) && ' ' === $line[0]) {
|
|
throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
|
|
}
|
|
|
|
if (str_contains($line, ': ')) {
|
|
throw new ParseException('Mapping values are not allowed in multi-line blocks.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
|
|
}
|
|
|
|
if ('' === $trimmedLine) {
|
|
$value .= "\n";
|
|
} elseif (!$previousLineWasNewline && !$previousLineWasTerminatedWithBackslash) {
|
|
$value .= ' ';
|
|
}
|
|
|
|
if ('' !== $trimmedLine && str_ends_with($line, '\\')) {
|
|
$value .= ltrim(substr($line, 0, -1));
|
|
} elseif ('' !== $trimmedLine) {
|
|
$value .= $trimmedLine;
|
|
}
|
|
|
|
if ('' === $trimmedLine) {
|
|
$previousLineWasNewline = true;
|
|
$previousLineWasTerminatedWithBackslash = false;
|
|
} elseif (str_ends_with($line, '\\')) {
|
|
$previousLineWasNewline = false;
|
|
$previousLineWasTerminatedWithBackslash = true;
|
|
} else {
|
|
$previousLineWasNewline = false;
|
|
$previousLineWasTerminatedWithBackslash = false;
|
|
}
|
|
}
|
|
|
|
try {
|
|
return Inline::parse(trim($value));
|
|
} catch (ParseException) {
|
|
// fall-through to the ParseException thrown below
|
|
}
|
|
}
|
|
|
|
throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
|
|
}
|
|
} while ($this->moveToNextLine());
|
|
|
|
if (null !== $tag) {
|
|
$data = new TaggedValue($tag, $data);
|
|
}
|
|
|
|
if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && 'mapping' === $context && !\is_object($data)) {
|
|
$object = new \stdClass();
|
|
|
|
foreach ($data as $key => $value) {
|
|
$object->$key = $value;
|
|
}
|
|
|
|
$data = $object;
|
|
}
|
|
|
|
return empty($data) ? null : $data;
|
|
}
|
|
|
|
private function parseBlock(int $offset, string $yaml, int $flags)
|
|
{
|
|
$skippedLineNumbers = $this->skippedLineNumbers;
|
|
|
|
foreach ($this->locallySkippedLineNumbers as $lineNumber) {
|
|
if ($lineNumber < $offset) {
|
|
continue;
|
|
}
|
|
|
|
$skippedLineNumbers[] = $lineNumber;
|
|
}
|
|
|
|
$parser = new self();
|
|
$parser->offset = $offset;
|
|
$parser->totalNumberOfLines = $this->totalNumberOfLines;
|
|
$parser->skippedLineNumbers = $skippedLineNumbers;
|
|
$parser->refs = &$this->refs;
|
|
$parser->refsBeingParsed = $this->refsBeingParsed;
|
|
|
|
return $parser->doParse($yaml, $flags);
|
|
}
|
|
|
|
/**
|
|
* Returns the current line number (takes the offset into account).
|
|
*
|
|
* @internal
|
|
*/
|
|
public function getRealCurrentLineNb(): int
|
|
{
|
|
$realCurrentLineNumber = $this->currentLineNb + $this->offset;
|
|
|
|
foreach ($this->skippedLineNumbers as $skippedLineNumber) {
|
|
if ($skippedLineNumber > $realCurrentLineNumber) {
|
|
break;
|
|
}
|
|
|
|
++$realCurrentLineNumber;
|
|
}
|
|
|
|
return $realCurrentLineNumber;
|
|
}
|
|
|
|
private function getCurrentLineIndentation(): int
|
|
{
|
|
if (' ' !== ($this->currentLine[0] ?? '')) {
|
|
return 0;
|
|
}
|
|
|
|
return \strlen($this->currentLine) - \strlen(ltrim($this->currentLine, ' '));
|
|
}
|
|
|
|
/**
|
|
* Returns the next embed block of YAML.
|
|
*
|
|
* @param int|null $indentation The indent level at which the block is to be read, or null for default
|
|
* @param bool $inSequence True if the enclosing data structure is a sequence
|
|
*
|
|
* @throws ParseException When indentation problem are detected
|
|
*/
|
|
private function getNextEmbedBlock(int $indentation = null, bool $inSequence = false): string
|
|
{
|
|
$oldLineIndentation = $this->getCurrentLineIndentation();
|
|
|
|
if (!$this->moveToNextLine()) {
|
|
return '';
|
|
}
|
|
|
|
if (null === $indentation) {
|
|
$newIndent = null;
|
|
$movements = 0;
|
|
|
|
do {
|
|
$EOF = false;
|
|
|
|
// empty and comment-like lines do not influence the indentation depth
|
|
if ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()) {
|
|
$EOF = !$this->moveToNextLine();
|
|
|
|
if (!$EOF) {
|
|
++$movements;
|
|
}
|
|
} else {
|
|
$newIndent = $this->getCurrentLineIndentation();
|
|
}
|
|
} while (!$EOF && null === $newIndent);
|
|
|
|
for ($i = 0; $i < $movements; ++$i) {
|
|
$this->moveToPreviousLine();
|
|
}
|
|
|
|
$unindentedEmbedBlock = $this->isStringUnIndentedCollectionItem();
|
|
|
|
if (!$this->isCurrentLineEmpty() && 0 === $newIndent && !$unindentedEmbedBlock) {
|
|
throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
|
|
}
|
|
} else {
|
|
$newIndent = $indentation;
|
|
}
|
|
|
|
$data = [];
|
|
|
|
if ($this->getCurrentLineIndentation() >= $newIndent) {
|
|
$data[] = substr($this->currentLine, $newIndent ?? 0);
|
|
} elseif ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()) {
|
|
$data[] = $this->currentLine;
|
|
} else {
|
|
$this->moveToPreviousLine();
|
|
|
|
return '';
|
|
}
|
|
|
|
if ($inSequence && $oldLineIndentation === $newIndent && isset($data[0][0]) && '-' === $data[0][0]) {
|
|
// the previous line contained a dash but no item content, this line is a sequence item with the same indentation
|
|
// and therefore no nested list or mapping
|
|
$this->moveToPreviousLine();
|
|
|
|
return '';
|
|
}
|
|
|
|
$isItUnindentedCollection = $this->isStringUnIndentedCollectionItem();
|
|
$isItComment = $this->isCurrentLineComment();
|
|
|
|
while ($this->moveToNextLine()) {
|
|
if ($isItComment && !$isItUnindentedCollection) {
|
|
$isItUnindentedCollection = $this->isStringUnIndentedCollectionItem();
|
|
$isItComment = $this->isCurrentLineComment();
|
|
}
|
|
|
|
$indent = $this->getCurrentLineIndentation();
|
|
|
|
if ($isItUnindentedCollection && !$this->isCurrentLineEmpty() && !$this->isStringUnIndentedCollectionItem() && $newIndent === $indent) {
|
|
$this->moveToPreviousLine();
|
|
break;
|
|
}
|
|
|
|
if ($this->isCurrentLineBlank()) {
|
|
$data[] = substr($this->currentLine, $newIndent);
|
|
continue;
|
|
}
|
|
|
|
if ($indent >= $newIndent) {
|
|
$data[] = substr($this->currentLine, $newIndent);
|
|
} elseif ($this->isCurrentLineComment()) {
|
|
$data[] = $this->currentLine;
|
|
} elseif (0 == $indent) {
|
|
$this->moveToPreviousLine();
|
|
|
|
break;
|
|
} else {
|
|
throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine, $this->filename);
|
|
}
|
|
}
|
|
|
|
return implode("\n", $data);
|
|
}
|
|
|
|
private function hasMoreLines(): bool
|
|
{
|
|
return (\count($this->lines) - 1) > $this->currentLineNb;
|
|
}
|
|
|
|
/**
|
|
* Moves the parser to the next line.
|
|
*/
|
|
private function moveToNextLine(): bool
|
|
{
|
|
if ($this->currentLineNb >= $this->numberOfParsedLines - 1) {
|
|
return false;
|
|
}
|
|
|
|
$this->currentLine = $this->lines[++$this->currentLineNb];
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Moves the parser to the previous line.
|
|
*/
|
|
private function moveToPreviousLine(): bool
|
|
{
|
|
if ($this->currentLineNb < 1) {
|
|
return false;
|
|
}
|
|
|
|
$this->currentLine = $this->lines[--$this->currentLineNb];
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parses a YAML value.
|
|
*
|
|
* @param string $value A YAML value
|
|
* @param int $flags A bit field of Yaml::PARSE_* constants to customize the YAML parser behavior
|
|
* @param string $context The parser context (either sequence or mapping)
|
|
*
|
|
* @throws ParseException When reference does not exist
|
|
*/
|
|
private function parseValue(string $value, int $flags, string $context): mixed
|
|
{
|
|
if (str_starts_with($value, '*')) {
|
|
if (false !== $pos = strpos($value, '#')) {
|
|
$value = substr($value, 1, $pos - 2);
|
|
} else {
|
|
$value = substr($value, 1);
|
|
}
|
|
|
|
if (!\array_key_exists($value, $this->refs)) {
|
|
if (false !== $pos = array_search($value, $this->refsBeingParsed, true)) {
|
|
throw new ParseException(sprintf('Circular reference [%s] detected for reference "%s".', implode(', ', array_merge(\array_slice($this->refsBeingParsed, $pos), [$value])), $value), $this->currentLineNb + 1, $this->currentLine, $this->filename);
|
|
}
|
|
|
|
throw new ParseException(sprintf('Reference "%s" does not exist.', $value), $this->currentLineNb + 1, $this->currentLine, $this->filename);
|
|
}
|
|
|
|
return $this->refs[$value];
|
|
}
|
|
|
|
if (\in_array($value[0], ['!', '|', '>'], true) && self::preg_match('/^(?:'.self::TAG_PATTERN.' +)?'.self::BLOCK_SCALAR_HEADER_PATTERN.'$/', $value, $matches)) {
|
|
$modifiers = $matches['modifiers'] ?? '';
|
|
|
|
$data = $this->parseBlockScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), abs((int) $modifiers));
|
|
|
|
if ('' !== $matches['tag'] && '!' !== $matches['tag']) {
|
|
if ('!!binary' === $matches['tag']) {
|
|
return Inline::evaluateBinaryScalar($data);
|
|
}
|
|
|
|
return new TaggedValue(substr($matches['tag'], 1), $data);
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
try {
|
|
if ('' !== $value && '{' === $value[0]) {
|
|
$cursor = \strlen(rtrim($this->currentLine)) - \strlen(rtrim($value));
|
|
|
|
return Inline::parse($this->lexInlineMapping($cursor), $flags, $this->refs);
|
|
} elseif ('' !== $value && '[' === $value[0]) {
|
|
$cursor = \strlen(rtrim($this->currentLine)) - \strlen(rtrim($value));
|
|
|
|
return Inline::parse($this->lexInlineSequence($cursor), $flags, $this->refs);
|
|
}
|
|
|
|
switch ($value[0] ?? '') {
|
|
case '"':
|
|
case "'":
|
|
$cursor = \strlen(rtrim($this->currentLine)) - \strlen(rtrim($value));
|
|
$parsedValue = Inline::parse($this->lexInlineQuotedString($cursor), $flags, $this->refs);
|
|
|
|
if (isset($this->currentLine[$cursor]) && preg_replace('/\s*(#.*)?$/A', '', substr($this->currentLine, $cursor))) {
|
|
throw new ParseException(sprintf('Unexpected characters near "%s".', substr($this->currentLine, $cursor)));
|
|
}
|
|
|
|
return $parsedValue;
|
|
default:
|
|
$lines = [];
|
|
|
|
while ($this->moveToNextLine()) {
|
|
// unquoted strings end before the first unindented line
|
|
if (0 === $this->getCurrentLineIndentation()) {
|
|
$this->moveToPreviousLine();
|
|
|
|
break;
|
|
}
|
|
|
|
$lines[] = trim($this->currentLine);
|
|
}
|
|
|
|
for ($i = 0, $linesCount = \count($lines), $previousLineBlank = false; $i < $linesCount; ++$i) {
|
|
if ('' === $lines[$i]) {
|
|
$value .= "\n";
|
|
$previousLineBlank = true;
|
|
} elseif ($previousLineBlank) {
|
|
$value .= $lines[$i];
|
|
$previousLineBlank = false;
|
|
} else {
|
|
$value .= ' '.$lines[$i];
|
|
$previousLineBlank = false;
|
|
}
|
|
}
|
|
|
|
Inline::$parsedLineNumber = $this->getRealCurrentLineNb();
|
|
|
|
$parsedValue = Inline::parse($value, $flags, $this->refs);
|
|
|
|
if ('mapping' === $context && \is_string($parsedValue) && '"' !== $value[0] && "'" !== $value[0] && '[' !== $value[0] && '{' !== $value[0] && '!' !== $value[0] && str_contains($parsedValue, ': ')) {
|
|
throw new ParseException('A colon cannot be used in an unquoted mapping value.', $this->getRealCurrentLineNb() + 1, $value, $this->filename);
|
|
}
|
|
|
|
return $parsedValue;
|
|
}
|
|
} catch (ParseException $e) {
|
|
$e->setParsedLine($this->getRealCurrentLineNb() + 1);
|
|
$e->setSnippet($this->currentLine);
|
|
|
|
throw $e;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parses a block scalar.
|
|
*
|
|
* @param string $style The style indicator that was used to begin this block scalar (| or >)
|
|
* @param string $chomping The chomping indicator that was used to begin this block scalar (+ or -)
|
|
* @param int $indentation The indentation indicator that was used to begin this block scalar
|
|
*/
|
|
private function parseBlockScalar(string $style, string $chomping = '', int $indentation = 0): string
|
|
{
|
|
$notEOF = $this->moveToNextLine();
|
|
if (!$notEOF) {
|
|
return '';
|
|
}
|
|
|
|
$isCurrentLineBlank = $this->isCurrentLineBlank();
|
|
$blockLines = [];
|
|
|
|
// leading blank lines are consumed before determining indentation
|
|
while ($notEOF && $isCurrentLineBlank) {
|
|
// newline only if not EOF
|
|
if ($notEOF = $this->moveToNextLine()) {
|
|
$blockLines[] = '';
|
|
$isCurrentLineBlank = $this->isCurrentLineBlank();
|
|
}
|
|
}
|
|
|
|
// determine indentation if not specified
|
|
if (0 === $indentation) {
|
|
$currentLineLength = \strlen($this->currentLine);
|
|
|
|
for ($i = 0; $i < $currentLineLength && ' ' === $this->currentLine[$i]; ++$i) {
|
|
++$indentation;
|
|
}
|
|
}
|
|
|
|
if ($indentation > 0) {
|
|
$pattern = sprintf('/^ {%d}(.*)$/', $indentation);
|
|
|
|
while (
|
|
$notEOF && (
|
|
$isCurrentLineBlank ||
|
|
self::preg_match($pattern, $this->currentLine, $matches)
|
|
)
|
|
) {
|
|
if ($isCurrentLineBlank && \strlen($this->currentLine) > $indentation) {
|
|
$blockLines[] = substr($this->currentLine, $indentation);
|
|
} elseif ($isCurrentLineBlank) {
|
|
$blockLines[] = '';
|
|
} else {
|
|
$blockLines[] = $matches[1];
|
|
}
|
|
|
|
// newline only if not EOF
|
|
if ($notEOF = $this->moveToNextLine()) {
|
|
$isCurrentLineBlank = $this->isCurrentLineBlank();
|
|
}
|
|
}
|
|
} elseif ($notEOF) {
|
|
$blockLines[] = '';
|
|
}
|
|
|
|
if ($notEOF) {
|
|
$blockLines[] = '';
|
|
$this->moveToPreviousLine();
|
|
} elseif (!$notEOF && !$this->isCurrentLineLastLineInDocument()) {
|
|
$blockLines[] = '';
|
|
}
|
|
|
|
// folded style
|
|
if ('>' === $style) {
|
|
$text = '';
|
|
$previousLineIndented = false;
|
|
$previousLineBlank = false;
|
|
|
|
for ($i = 0, $blockLinesCount = \count($blockLines); $i < $blockLinesCount; ++$i) {
|
|
if ('' === $blockLines[$i]) {
|
|
$text .= "\n";
|
|
$previousLineIndented = false;
|
|
$previousLineBlank = true;
|
|
} elseif (' ' === $blockLines[$i][0]) {
|
|
$text .= "\n".$blockLines[$i];
|
|
$previousLineIndented = true;
|
|
$previousLineBlank = false;
|
|
} elseif ($previousLineIndented) {
|
|
$text .= "\n".$blockLines[$i];
|
|
$previousLineIndented = false;
|
|
$previousLineBlank = false;
|
|
} elseif ($previousLineBlank || 0 === $i) {
|
|
$text .= $blockLines[$i];
|
|
$previousLineIndented = false;
|
|
$previousLineBlank = false;
|
|
} else {
|
|
$text .= ' '.$blockLines[$i];
|
|
$previousLineIndented = false;
|
|
$previousLineBlank = false;
|
|
}
|
|
}
|
|
} else {
|
|
$text = implode("\n", $blockLines);
|
|
}
|
|
|
|
// deal with trailing newlines
|
|
if ('' === $chomping) {
|
|
$text = preg_replace('/\n+$/', "\n", $text);
|
|
} elseif ('-' === $chomping) {
|
|
$text = preg_replace('/\n+$/', '', $text);
|
|
}
|
|
|
|
return $text;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the next line is indented.
|
|
*/
|
|
private function isNextLineIndented(): bool
|
|
{
|
|
$currentIndentation = $this->getCurrentLineIndentation();
|
|
$movements = 0;
|
|
|
|
do {
|
|
$EOF = !$this->moveToNextLine();
|
|
|
|
if (!$EOF) {
|
|
++$movements;
|
|
}
|
|
} while (!$EOF && ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()));
|
|
|
|
if ($EOF) {
|
|
return false;
|
|
}
|
|
|
|
$ret = $this->getCurrentLineIndentation() > $currentIndentation;
|
|
|
|
for ($i = 0; $i < $movements; ++$i) {
|
|
$this->moveToPreviousLine();
|
|
}
|
|
|
|
return $ret;
|
|
}
|
|
|
|
private function isCurrentLineEmpty(): bool
|
|
{
|
|
return $this->isCurrentLineBlank() || $this->isCurrentLineComment();
|
|
}
|
|
|
|
private function isCurrentLineBlank(): bool
|
|
{
|
|
return '' === $this->currentLine || '' === trim($this->currentLine, ' ');
|
|
}
|
|
|
|
private function isCurrentLineComment(): bool
|
|
{
|
|
// checking explicitly the first char of the trim is faster than loops or strpos
|
|
$ltrimmedLine = '' !== $this->currentLine && ' ' === $this->currentLine[0] ? ltrim($this->currentLine, ' ') : $this->currentLine;
|
|
|
|
return '' !== $ltrimmedLine && '#' === $ltrimmedLine[0];
|
|
}
|
|
|
|
private function isCurrentLineLastLineInDocument(): bool
|
|
{
|
|
return ($this->offset + $this->currentLineNb) >= ($this->totalNumberOfLines - 1);
|
|
}
|
|
|
|
private function cleanup(string $value): string
|
|
{
|
|
$value = str_replace(["\r\n", "\r"], "\n", $value);
|
|
|
|
// strip YAML header
|
|
$count = 0;
|
|
$value = preg_replace('#^\%YAML[: ][\d\.]+.*\n#u', '', $value, -1, $count);
|
|
$this->offset += $count;
|
|
|
|
// remove leading comments
|
|
$trimmedValue = preg_replace('#^(\#.*?\n)+#s', '', $value, -1, $count);
|
|
if (1 === $count) {
|
|
// items have been removed, update the offset
|
|
$this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
|
|
$value = $trimmedValue;
|
|
}
|
|
|
|
// remove start of the document marker (---)
|
|
$trimmedValue = preg_replace('#^\-\-\-.*?\n#s', '', $value, -1, $count);
|
|
if (1 === $count) {
|
|
// items have been removed, update the offset
|
|
$this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
|
|
$value = $trimmedValue;
|
|
|
|
// remove end of the document marker (...)
|
|
$value = preg_replace('#\.\.\.\s*$#', '', $value);
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
private function isNextLineUnIndentedCollection(): bool
|
|
{
|
|
$currentIndentation = $this->getCurrentLineIndentation();
|
|
$movements = 0;
|
|
|
|
do {
|
|
$EOF = !$this->moveToNextLine();
|
|
|
|
if (!$EOF) {
|
|
++$movements;
|
|
}
|
|
} while (!$EOF && ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()));
|
|
|
|
if ($EOF) {
|
|
return false;
|
|
}
|
|
|
|
$ret = $this->getCurrentLineIndentation() === $currentIndentation && $this->isStringUnIndentedCollectionItem();
|
|
|
|
for ($i = 0; $i < $movements; ++$i) {
|
|
$this->moveToPreviousLine();
|
|
}
|
|
|
|
return $ret;
|
|
}
|
|
|
|
private function isStringUnIndentedCollectionItem(): bool
|
|
{
|
|
return '-' === rtrim($this->currentLine) || str_starts_with($this->currentLine, '- ');
|
|
}
|
|
|
|
/**
|
|
* A local wrapper for "preg_match" which will throw a ParseException if there
|
|
* is an internal error in the PCRE engine.
|
|
*
|
|
* This avoids us needing to check for "false" every time PCRE is used
|
|
* in the YAML engine
|
|
*
|
|
* @throws ParseException on a PCRE internal error
|
|
*
|
|
* @internal
|
|
*/
|
|
public static function preg_match(string $pattern, string $subject, array &$matches = null, int $flags = 0, int $offset = 0): int
|
|
{
|
|
if (false === $ret = preg_match($pattern, $subject, $matches, $flags, $offset)) {
|
|
throw new ParseException(preg_last_error_msg());
|
|
}
|
|
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* Trim the tag on top of the value.
|
|
*
|
|
* Prevent values such as "!foo {quz: bar}" to be considered as
|
|
* a mapping block.
|
|
*/
|
|
private function trimTag(string $value): string
|
|
{
|
|
if ('!' === $value[0]) {
|
|
return ltrim(substr($value, 1, strcspn($value, " \r\n", 1)), ' ');
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
private function getLineTag(string $value, int $flags, bool $nextLineCheck = true): ?string
|
|
{
|
|
if ('' === $value || '!' !== $value[0] || 1 !== self::preg_match('/^'.self::TAG_PATTERN.' *( +#.*)?$/', $value, $matches)) {
|
|
return null;
|
|
}
|
|
|
|
if ($nextLineCheck && !$this->isNextLineIndented()) {
|
|
return null;
|
|
}
|
|
|
|
$tag = substr($matches['tag'], 1);
|
|
|
|
// Built-in tags
|
|
if ($tag && '!' === $tag[0]) {
|
|
throw new ParseException(sprintf('The built-in tag "!%s" is not implemented.', $tag), $this->getRealCurrentLineNb() + 1, $value, $this->filename);
|
|
}
|
|
|
|
if (Yaml::PARSE_CUSTOM_TAGS & $flags) {
|
|
return $tag;
|
|
}
|
|
|
|
throw new ParseException(sprintf('Tags support is not enabled. You must use the flag "Yaml::PARSE_CUSTOM_TAGS" to use "%s".', $matches['tag']), $this->getRealCurrentLineNb() + 1, $value, $this->filename);
|
|
}
|
|
|
|
private function lexInlineQuotedString(int &$cursor = 0): string
|
|
{
|
|
$quotation = $this->currentLine[$cursor];
|
|
$value = $quotation;
|
|
++$cursor;
|
|
|
|
$previousLineWasNewline = true;
|
|
$previousLineWasTerminatedWithBackslash = false;
|
|
$lineNumber = 0;
|
|
|
|
do {
|
|
if (++$lineNumber > 1) {
|
|
$cursor += strspn($this->currentLine, ' ', $cursor);
|
|
}
|
|
|
|
if ($this->isCurrentLineBlank()) {
|
|
$value .= "\n";
|
|
} elseif (!$previousLineWasNewline && !$previousLineWasTerminatedWithBackslash) {
|
|
$value .= ' ';
|
|
}
|
|
|
|
for (; \strlen($this->currentLine) > $cursor; ++$cursor) {
|
|
switch ($this->currentLine[$cursor]) {
|
|
case '\\':
|
|
if ("'" === $quotation) {
|
|
$value .= '\\';
|
|
} elseif (isset($this->currentLine[++$cursor])) {
|
|
$value .= '\\'.$this->currentLine[$cursor];
|
|
}
|
|
|
|
break;
|
|
case $quotation:
|
|
++$cursor;
|
|
|
|
if ("'" === $quotation && isset($this->currentLine[$cursor]) && "'" === $this->currentLine[$cursor]) {
|
|
$value .= "''";
|
|
break;
|
|
}
|
|
|
|
return $value.$quotation;
|
|
default:
|
|
$value .= $this->currentLine[$cursor];
|
|
}
|
|
}
|
|
|
|
if ($this->isCurrentLineBlank()) {
|
|
$previousLineWasNewline = true;
|
|
$previousLineWasTerminatedWithBackslash = false;
|
|
} elseif ('\\' === $this->currentLine[-1]) {
|
|
$previousLineWasNewline = false;
|
|
$previousLineWasTerminatedWithBackslash = true;
|
|
} else {
|
|
$previousLineWasNewline = false;
|
|
$previousLineWasTerminatedWithBackslash = false;
|
|
}
|
|
|
|
if ($this->hasMoreLines()) {
|
|
$cursor = 0;
|
|
}
|
|
} while ($this->moveToNextLine());
|
|
|
|
throw new ParseException('Malformed inline YAML string.');
|
|
}
|
|
|
|
private function lexUnquotedString(int &$cursor): string
|
|
{
|
|
$offset = $cursor;
|
|
$cursor += strcspn($this->currentLine, '[]{},: ', $cursor);
|
|
|
|
if ($cursor === $offset) {
|
|
throw new ParseException('Malformed unquoted YAML string.');
|
|
}
|
|
|
|
return substr($this->currentLine, $offset, $cursor - $offset);
|
|
}
|
|
|
|
private function lexInlineMapping(int &$cursor = 0): string
|
|
{
|
|
return $this->lexInlineStructure($cursor, '}');
|
|
}
|
|
|
|
private function lexInlineSequence(int &$cursor = 0): string
|
|
{
|
|
return $this->lexInlineStructure($cursor, ']');
|
|
}
|
|
|
|
private function lexInlineStructure(int &$cursor, string $closingTag): string
|
|
{
|
|
$value = $this->currentLine[$cursor];
|
|
++$cursor;
|
|
|
|
do {
|
|
$this->consumeWhitespaces($cursor);
|
|
|
|
while (isset($this->currentLine[$cursor])) {
|
|
switch ($this->currentLine[$cursor]) {
|
|
case '"':
|
|
case "'":
|
|
$value .= $this->lexInlineQuotedString($cursor);
|
|
break;
|
|
case ':':
|
|
case ',':
|
|
$value .= $this->currentLine[$cursor];
|
|
++$cursor;
|
|
break;
|
|
case '{':
|
|
$value .= $this->lexInlineMapping($cursor);
|
|
break;
|
|
case '[':
|
|
$value .= $this->lexInlineSequence($cursor);
|
|
break;
|
|
case $closingTag:
|
|
$value .= $this->currentLine[$cursor];
|
|
++$cursor;
|
|
|
|
return $value;
|
|
case '#':
|
|
break 2;
|
|
default:
|
|
$value .= $this->lexUnquotedString($cursor);
|
|
}
|
|
|
|
if ($this->consumeWhitespaces($cursor)) {
|
|
$value .= ' ';
|
|
}
|
|
}
|
|
|
|
if ($this->hasMoreLines()) {
|
|
$cursor = 0;
|
|
}
|
|
} while ($this->moveToNextLine());
|
|
|
|
throw new ParseException('Malformed inline YAML string.');
|
|
}
|
|
|
|
private function consumeWhitespaces(int &$cursor): bool
|
|
{
|
|
$whitespacesConsumed = 0;
|
|
|
|
do {
|
|
$whitespaceOnlyTokenLength = strspn($this->currentLine, ' ', $cursor);
|
|
$whitespacesConsumed += $whitespaceOnlyTokenLength;
|
|
$cursor += $whitespaceOnlyTokenLength;
|
|
|
|
if (isset($this->currentLine[$cursor])) {
|
|
return 0 < $whitespacesConsumed;
|
|
}
|
|
|
|
if ($this->hasMoreLines()) {
|
|
$cursor = 0;
|
|
}
|
|
} while ($this->moveToNextLine());
|
|
|
|
return 0 < $whitespacesConsumed;
|
|
}
|
|
}
|