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GlobResource.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Config\Resource;
013
014 use Symfony\Component\Finder\Finder;
015 use Symfony\Component\Finder\Glob;
016
017 /**
018 * GlobResource represents a set of resources stored on the filesystem.
019 *
020 * Only existence/removal is tracked (not mtimes.)
021 *
022 * @author Nicolas Grekas <p@tchwork.com>
023 */
024 class GlobResource implements \IteratorAggregate, SelfCheckingResourceInterface, \Serializable
025 {
026 private $prefix;
027 private $pattern;
028 private $recursive;
029 private $hash;
030
031 /**
032 * @param string $prefix A directory prefix
033 * @param string $pattern A glob pattern
034 * @param bool $recursive Whether directories should be scanned recursively or not
035 *
036 * @throws \InvalidArgumentException
037 */
038 public function __construct($prefix, $pattern, $recursive)
039 {
040 $this->prefix = realpath($prefix) ?: (file_exists($prefix) ? $prefix : false);
041 $this->pattern = $pattern;
042 $this->recursive = $recursive;
043
044 if (false === $this->prefix) {
045 throw new \InvalidArgumentException(sprintf('The path "%s" does not exist.', $prefix));
046 }
047 }
048
049 public function getPrefix()
050 {
051 return $this->prefix;
052 }
053
054 /**
055 * {@inheritdoc}
056 */
057 public function __toString()
058 {
059 return 'glob.'.$this->prefix.$this->pattern.(int) $this->recursive;
060 }
061
062 /**
063 * {@inheritdoc}
064 */
065 public function isFresh($timestamp)
066 {
067 $hash = $this->computeHash();
068
069 if (null === $this->hash) {
070 $this->hash = $hash;
071 }
072
073 return $this->hash === $hash;
074 }
075
076 /**
077 * @internal
078 */
079 public function serialize()
080 {
081 if (null === $this->hash) {
082 $this->hash = $this->computeHash();
083 }
084
085 return serialize([$this->prefix, $this->pattern, $this->recursive, $this->hash]);
086 }
087
088 /**
089 * @internal
090 */
091 public function unserialize($serialized)
092 {
093 list($this->prefix, $this->pattern, $this->recursive, $this->hash) = unserialize($serialized);
094 }
095
096 public function getIterator()
097 {
098 if (!file_exists($this->prefix) || (!$this->recursive && '' === $this->pattern)) {
099 return;
100 }
101
102 if (0 !== strpos($this->prefix, 'phar://') && false === strpos($this->pattern, '/**/') && (\defined('GLOB_BRACE') || false === strpos($this->pattern, '{'))) {
103 $paths = glob($this->prefix.$this->pattern, \GLOB_NOSORT | (\defined('GLOB_BRACE') ? \GLOB_BRACE : 0));
104 sort($paths);
105 foreach ($paths as $path) {
106 if ($this->recursive && is_dir($path)) {
107 $files = iterator_to_array(new \RecursiveIteratorIterator(
108 new \RecursiveCallbackFilterIterator(
109 new \RecursiveDirectoryIterator($path, \FilesystemIterator::SKIP_DOTS | \FilesystemIterator::FOLLOW_SYMLINKS),
110 function (\SplFileInfo $file) { return '.' !== $file->getBasename()[0]; }
111 ),
112 \RecursiveIteratorIterator::LEAVES_ONLY
113 ));
114 uasort($files, function (\SplFileInfo $a, \SplFileInfo $b) {
115 return (string) $a > (string) $b ? 1 : -1;
116 });
117
118 foreach ($files as $path => $info) {
119 if ($info->isFile()) {
120 yield $path => $info;
121 }
122 }
123 } elseif (is_file($path)) {
124 yield $path => new \SplFileInfo($path);
125 }
126 }
127
128 return;
129 }
130
131 if (!class_exists(Finder::class)) {
132 throw new \LogicException(sprintf('Extended glob pattern "%s" cannot be used as the Finder component is not installed.', $this->pattern));
133 }
134
135 $finder = new Finder();
136 $regex = Glob::toRegex($this->pattern);
137 if ($this->recursive) {
138 $regex = substr_replace($regex, '(/|$)', -2, 1);
139 }
140
141 $prefixLen = \strlen($this->prefix);
142 foreach ($finder->followLinks()->sortByName()->in($this->prefix) as $path => $info) {
143 if (preg_match($regex, substr('\\' === \DIRECTORY_SEPARATOR ? str_replace('\\', '/', $path) : $path, $prefixLen)) && $info->isFile()) {
144 yield $path => $info;
145 }
146 }
147 }
148
149 private function computeHash()
150 {
151 $hash = hash_init('md5');
152
153 foreach ($this->getIterator() as $path => $info) {
154 hash_update($hash, $path."\n");
155 }
156
157 return hash_final($hash);
158 }
159 }
160