*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Finder;
/**
* Gitignore matches against text.
*
* @author Ahmed Abdou
*/
class Gitignore
{
/**
* Returns a regexp which is the equivalent of the gitignore pattern.
*
* @param string $gitignoreFileContent
*
* @return string The regexp
*/
public static function toRegex(string $gitignoreFileContent): string
{
$gitignoreFileContent = preg_replace('/^[^\\\\]*#.*/', '', $gitignoreFileContent);
$gitignoreLines = preg_split('/\r\n|\r|\n/', $gitignoreFileContent);
$gitignoreLines = array_map('trim', $gitignoreLines);
$gitignoreLines = array_filter($gitignoreLines);
$ignoreLinesPositive = array_filter($gitignoreLines, function (string $line) {
return !preg_match('/^!/', $line);
});
$ignoreLinesNegative = array_filter($gitignoreLines, function (string $line) {
return preg_match('/^!/', $line);
});
$ignoreLinesNegative = array_map(function (string $line) {
return preg_replace('/^!(.*)/', '${1}', $line);
}, $ignoreLinesNegative);
$ignoreLinesNegative = array_map([__CLASS__, 'getRegexFromGitignore'], $ignoreLinesNegative);
$ignoreLinesPositive = array_map([__CLASS__, 'getRegexFromGitignore'], $ignoreLinesPositive);
if (empty($ignoreLinesPositive)) {
return '/^$/';
}
if (empty($ignoreLinesNegative)) {
return sprintf('/%s/', implode('|', $ignoreLinesPositive));
}
return sprintf('/(?=^(?:(?!(%s)).)*$)(%s)/', implode('|', $ignoreLinesNegative), implode('|', $ignoreLinesPositive));
}
private static function getRegexFromGitignore(string $gitignorePattern): string
{
$regex = '(';
if (0 === strpos($gitignorePattern, '/')) {
$gitignorePattern = substr($gitignorePattern, 1);
$regex .= '^';
} else {
$regex .= '(^|\/)';
}
if ('/' === $gitignorePattern[\strlen($gitignorePattern) - 1]) {
$gitignorePattern = substr($gitignorePattern, 0, -1);
}
$iMax = \strlen($gitignorePattern);
for ($i = 0; $i < $iMax; ++$i) {
$doubleChars = substr($gitignorePattern, $i, 2);
if ('**' === $doubleChars) {
$regex .= '.+';
++$i;
continue;
}
$c = $gitignorePattern[$i];
switch ($c) {
case '*':
$regex .= '[^\/]+';
break;
case '/':
case '.':
case ':':
case '(':
case ')':
case '{':
case '}':
$regex .= '\\'.$c;
break;
default:
$regex .= $c;
}
}
$regex .= '($|\/)';
$regex .= ')';
return $regex;
}
}