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<?php declare(strict_types=1);
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\ClassMapGenerator;
use Composer\Pcre\Preg;
/**
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
class PhpFileParser
{
/**
* Extract the classes in the given file
*
* @param string $path The file to check
* @throws \RuntimeException
* @return array<int, class-string> The found classes
*/
public static function findClasses(string $path): array
{
$extraTypes = self::getExtraTypes();
// Use @ here instead of Silencer to actively suppress 'unhelpful' output
// @link https://github.com/composer/composer/pull/4886
$contents = @php_strip_whitespace($path);
if ('' === $contents) {
if (!file_exists($path)) {
$message = 'File at "%s" does not exist, check your classmap definitions';
} elseif (!self::isReadable($path)) {
$message = 'File at "%s" is not readable, check its permissions';
} elseif ('' === trim((string) file_get_contents($path))) {
// The input file was really empty and thus contains no classes
return array();
} else {
$message = 'File at "%s" could not be parsed as PHP, it may be binary or corrupted';
}
$error = error_get_last();
if (isset($error['message'])) {
$message .= PHP_EOL . 'The following message may be helpful:' . PHP_EOL . $error['message'];
}
throw new \RuntimeException(sprintf($message, $path));
}
// return early if there is no chance of matching anything in this file
Preg::matchAllStrictGroups('{\b(?:class|interface|trait'.$extraTypes.')\s}i', $contents, $matches);
if (0 === \count($matches)) {
return array();
}
$p = new PhpFileCleaner($contents, count($matches[0]));
$contents = $p->clean();
unset($p);
Preg::matchAll('{
(?:
\b(?<![\$:>])(?P<type>class|interface|trait'.$extraTypes.') \s++ (?P<name>[a-zA-Z_\x7f-\xff:][a-zA-Z0-9_\x7f-\xff:\-]*+)
| \b(?<![\$:>])(?P<ns>namespace) (?P<nsname>\s++[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+(?:\s*+\\\\\s*+[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*+)*+)? \s*+ [\{;]
)
}ix', $contents, $matches);
$classes = array();
$namespace = '';
for ($i = 0, $len = count($matches['type']); $i < $len; $i++) {
if (isset($matches['ns'][$i]) && $matches['ns'][$i] !== '') {
$namespace = str_replace(array(' ', "\t", "\r", "\n"), '', (string) $matches['nsname'][$i]) . '\\';
} else {
$name = $matches['name'][$i];
assert(is_string($name));
// skip anon classes extending/implementing
if ($name === 'extends' || $name === 'implements') {
continue;
}
if ($name[0] === ':') {
// This is an XHP class, https://github.com/facebook/xhp
$name = 'xhp'.substr(str_replace(array('-', ':'), array('_', '__'), $name), 1);
} elseif (strtolower((string) $matches['type'][$i]) === 'enum') {
// something like:
// enum Foo: int { HERP = '123'; }
// The regex above captures the colon, which isn't part of
// the class name.
// or:
// enum Foo:int { HERP = '123'; }
// The regex above captures the colon and type, which isn't part of
// the class name.
$colonPos = strrpos($name, ':');
if (false !== $colonPos) {
$name = substr($name, 0, $colonPos);
}
}
$classes[] = ltrim($namespace . $name, '\\');
}
}
return $classes;
}
/**
* @return string
*/
private static function getExtraTypes(): string
{
static $extraTypes = null;
if (null === $extraTypes) {
$extraTypes = '';
if (PHP_VERSION_ID >= 80100 || (defined('HHVM_VERSION') && version_compare(HHVM_VERSION, '3.3', '>='))) {
$extraTypes .= '|enum';
}
PhpFileCleaner::setTypeConfig(array_merge(['class', 'interface', 'trait'], array_filter(explode('|', $extraTypes))));
}
return $extraTypes;
}
/**
* Cross-platform safe version of is_readable()
*
* This will also check for readability by reading the file as is_readable can not be trusted on network-mounts
* and \\wsl$ paths. See https://github.com/composer/composer/issues/8231 and https://bugs.php.net/bug.php?id=68926
*
* @see Composer\Util\Filesystem::isReadable
*
* @param string $path
* @return bool
*/
private static function isReadable(string $path)
{
if (is_readable($path)) {
return true;
}
if (is_file($path)) {
return false !== @file_get_contents($path, false, null, 0, 1);
}
// assume false otherwise
return false;
}
}