106 lines
3.1 KiB
PHP
106 lines
3.1 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\Finder;
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/**
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* Gitignore matches against text.
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*
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* @author Ahmed Abdou <mail@ahmd.io>
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*/
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class Gitignore
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{
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/**
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* Returns a regexp which is the equivalent of the gitignore pattern.
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*
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* @return string The regexp
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*/
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public static function toRegex(string $gitignoreFileContent): string
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{
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$gitignoreFileContent = preg_replace('/^[^\\\r\n]*#.*/m', '', $gitignoreFileContent);
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$gitignoreLines = preg_split('/\r\n|\r|\n/', $gitignoreFileContent);
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$gitignoreLines = array_map('trim', $gitignoreLines);
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$gitignoreLines = array_filter($gitignoreLines);
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$ignoreLinesPositive = array_filter($gitignoreLines, function (string $line) {
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return !preg_match('/^!/', $line);
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});
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$ignoreLinesNegative = array_filter($gitignoreLines, function (string $line) {
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return preg_match('/^!/', $line);
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});
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$ignoreLinesNegative = array_map(function (string $line) {
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return preg_replace('/^!(.*)/', '${1}', $line);
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}, $ignoreLinesNegative);
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$ignoreLinesNegative = array_map([__CLASS__, 'getRegexFromGitignore'], $ignoreLinesNegative);
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$ignoreLinesPositive = array_map([__CLASS__, 'getRegexFromGitignore'], $ignoreLinesPositive);
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if (empty($ignoreLinesPositive)) {
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return '/^$/';
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}
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if (empty($ignoreLinesNegative)) {
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return sprintf('/%s/', implode('|', $ignoreLinesPositive));
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}
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return sprintf('/(?=^(?:(?!(%s)).)*$)(%s)/', implode('|', $ignoreLinesNegative), implode('|', $ignoreLinesPositive));
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}
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private static function getRegexFromGitignore(string $gitignorePattern): string
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{
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$regex = '(';
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if (0 === strpos($gitignorePattern, '/')) {
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$gitignorePattern = substr($gitignorePattern, 1);
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$regex .= '^';
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} else {
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$regex .= '(^|\/)';
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}
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if ('/' === $gitignorePattern[\strlen($gitignorePattern) - 1]) {
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$gitignorePattern = substr($gitignorePattern, 0, -1);
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}
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$iMax = \strlen($gitignorePattern);
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for ($i = 0; $i < $iMax; ++$i) {
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$doubleChars = substr($gitignorePattern, $i, 2);
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if ('**' === $doubleChars) {
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$regex .= '.+';
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++$i;
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continue;
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}
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$c = $gitignorePattern[$i];
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switch ($c) {
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case '*':
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$regex .= '[^\/]+';
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break;
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case '/':
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case '.':
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case ':':
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case '(':
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case ')':
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case '{':
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case '}':
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$regex .= '\\'.$c;
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break;
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default:
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$regex .= $c;
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}
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}
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$regex .= '($|\/)';
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$regex .= ')';
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return $regex;
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}
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}
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