<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Config\Resource;
use Symfony\Component\Finder\Finder;
use Symfony\Component\Finder\Glob;
/**
* GlobResource represents a set of resources stored on the filesystem.
*
* Only existence/removal is tracked (not mtimes.)
*
* @author Nicolas Grekas <[email protected]>
*
* @final
*/
class GlobResource implements \IteratorAggregate, SelfCheckingResourceInterface
{
private $prefix;
private $pattern;
private $recursive;
private $hash;
private $forExclusion;
private $excludedPrefixes;
private $globBrace;
/**
* @param string $prefix A directory prefix
* @param string $pattern A glob pattern
* @param bool $recursive Whether directories should be scanned recursively or not
*
* @throws \InvalidArgumentException
*/
public function __construct(string $prefix, string $pattern, bool $recursive, bool $forExclusion = false, array $excludedPrefixes = [])
{
ksort($excludedPrefixes);
$this->prefix = realpath($prefix) ?: (file_exists($prefix) ? $prefix : false);
$this->pattern = $pattern;
$this->recursive = $recursive;
$this->forExclusion = $forExclusion;
$this->excludedPrefixes = $excludedPrefixes;
$this->globBrace = \defined('GLOB_BRACE') ? \GLOB_BRACE : 0;
if (false === $this->prefix) {
throw new \InvalidArgumentException(sprintf('The path "%s" does not exist.', $prefix));
}
}
public function getPrefix(): string
{
return $this->prefix;
}
/**
* {@inheritdoc}
*/
public function __toString(): string
{
return 'glob.'.$this->prefix.(int) $this->recursive.$this->pattern.(int) $this->forExclusion.implode("\0", $this->excludedPrefixes);
}
/**
* {@inheritdoc}
*/
public function isFresh(int $timestamp): bool
{
$hash = $this->computeHash();
if (null === $this->hash) {
$this->hash = $hash;
}
return $this->hash === $hash;
}
/**
* @internal
*/
public function __sleep(): array
{
if (null === $this->hash) {
$this->hash = $this->computeHash();
}
return ['prefix', 'pattern', 'recursive', 'hash', 'forExclusion', 'excludedPrefixes'];
}
/**
* @internal
*/
public function __wakeup(): void
{
$this->globBrace = \defined('GLOB_BRACE') ? \GLOB_BRACE : 0;
}
public function getIterator(): \Traversable
{
if (!file_exists($this->prefix) || (!$this->recursive && '' === $this->pattern)) {
return;
}
$prefix = str_replace('\\', '/', $this->prefix);
$paths = null;
if (0 !== strpos($this->prefix, 'phar://') && false === strpos($this->pattern, '/**/')) {
if ($this->globBrace || false === strpos($this->pattern, '{')) {
$paths = glob($this->prefix.$this->pattern, \GLOB_NOSORT | $this->globBrace);
} elseif (false === strpos($this->pattern, '\\') || !preg_match('/\\\\[,{}]/', $this->pattern)) {
foreach ($this->expandGlob($this->pattern) as $p) {
$paths[] = glob($this->prefix.$p, \GLOB_NOSORT);
}
$paths = array_merge(...$paths);
}
}
if (null !== $paths) {
sort($paths);
foreach ($paths as $path) {
if ($this->excludedPrefixes) {
$normalizedPath = str_replace('\\', '/', $path);
do {
if (isset($this->excludedPrefixes[$dirPath = $normalizedPath])) {
continue 2;
}
} while ($prefix !== $dirPath && $dirPath !== $normalizedPath = \dirname($dirPath));
}
if (is_file($path)) {
yield $path => new \SplFileInfo($path);
}
if (!is_dir($path)) {
continue;
}
if ($this->forExclusion) {
yield $path => new \SplFileInfo($path);
continue;
}
if (!$this->recursive || isset($this->excludedPrefixes[str_replace('\\', '/', $path)])) {
continue;
}
$files = iterator_to_array(new \RecursiveIteratorIterator(
new \RecursiveCallbackFilterIterator(
new \RecursiveDirectoryIterator($path, \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::FOLLOW_SYMLINKS),
function (\SplFileInfo $file, $path) {
return !isset($this->excludedPrefixes[str_replace('\\', '/', $path)]) && '.' !== $file->getBasename()[0];
}
),
\RecursiveIteratorIterator::LEAVES_ONLY
));
uasort($files, 'strnatcmp');
foreach ($files as $path => $info) {
if ($info->isFile()) {
yield $path => $info;
}
}
}
return;
}
if (!class_exists(Finder::class)) {
throw new \LogicException(sprintf('Extended glob pattern "%s" cannot be used as the Finder component is not installed.', $this->pattern));
}
$finder = new Finder();
$regex = Glob::toRegex($this->pattern);
if ($this->recursive) {
$regex = substr_replace($regex, '(/|$)', -2, 1);
}
$prefixLen = \strlen($this->prefix);
foreach ($finder->followLinks()->sortByName()->in($this->prefix) as $path => $info) {
$normalizedPath = str_replace('\\', '/', $path);
if (!preg_match($regex, substr($normalizedPath, $prefixLen)) || !$info->isFile()) {
continue;
}
if ($this->excludedPrefixes) {
do {
if (isset($this->excludedPrefixes[$dirPath = $normalizedPath])) {
continue 2;
}
} while ($prefix !== $dirPath && $dirPath !== $normalizedPath = \dirname($dirPath));
}
yield $path => $info;
}
}
private function computeHash(): string
{
$hash = hash_init('md5');
foreach ($this->getIterator() as $path => $info) {
hash_update($hash, $path."\n");
}
return hash_final($hash);
}
private function expandGlob(string $pattern): array
{
$segments = preg_split('/\{([^{}]*+)\}/', $pattern, -1, \PREG_SPLIT_DELIM_CAPTURE);
$paths = [$segments[0]];
$patterns = [];
for ($i = 1; $i < \count($segments); $i += 2) {
$patterns = [];
foreach (explode(',', $segments[$i]) as $s) {
foreach ($paths as $p) {
$patterns[] = $p.$s.$segments[1 + $i];
}
}
$paths = $patterns;
}
$j = 0;
foreach ($patterns as $i => $p) {
if (false !== strpos($p, '{')) {
$p = $this->expandGlob($p);
array_splice($paths, $i + $j, 1, $p);
$j += \count($p) - 1;
}
}
return $paths;
}
}