955 lines
28 KiB
PHP
955 lines
28 KiB
PHP
<?php
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/*
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* This file is part of Composer.
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*
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* (c) Nils Adermann <naderman@naderman.de>
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* Jordi Boggiano <j.boggiano@seld.be>
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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 Composer\Util;
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use React\Promise\PromiseInterface;
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use RecursiveDirectoryIterator;
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use RecursiveIteratorIterator;
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use Symfony\Component\Filesystem\Exception\IOException;
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use Symfony\Component\Finder\Finder;
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/**
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* @author Jordi Boggiano <j.boggiano@seld.be>
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* @author Johannes M. Schmitt <schmittjoh@gmail.com>
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*/
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class Filesystem
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{
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/** @var ?ProcessExecutor */
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private $processExecutor;
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public function __construct(ProcessExecutor $executor = null)
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{
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$this->processExecutor = $executor;
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}
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/**
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* @param string $file
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*
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* @return bool
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*/
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public function remove($file)
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{
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if (is_dir($file)) {
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return $this->removeDirectory($file);
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}
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if (file_exists($file)) {
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return $this->unlink($file);
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}
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return false;
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}
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/**
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* Checks if a directory is empty
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*
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* @param string $dir
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* @return bool
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*/
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public function isDirEmpty($dir)
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{
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$finder = Finder::create()
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->ignoreVCS(false)
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->ignoreDotFiles(false)
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->depth(0)
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->in($dir);
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return \count($finder) === 0;
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}
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/**
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* @param string $dir
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* @param bool $ensureDirectoryExists
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*
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* @return void
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*/
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public function emptyDirectory($dir, $ensureDirectoryExists = true)
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{
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if (is_link($dir) && file_exists($dir)) {
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$this->unlink($dir);
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}
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if ($ensureDirectoryExists) {
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$this->ensureDirectoryExists($dir);
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}
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if (is_dir($dir)) {
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$finder = Finder::create()
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->ignoreVCS(false)
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->ignoreDotFiles(false)
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->depth(0)
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->in($dir);
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foreach ($finder as $path) {
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$this->remove((string) $path);
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}
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}
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}
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/**
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* Recursively remove a directory
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*
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* Uses the process component if proc_open is enabled on the PHP
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* installation.
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*
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* @param string $directory
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* @throws \RuntimeException
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* @return bool
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*/
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public function removeDirectory($directory)
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{
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$edgeCaseResult = $this->removeEdgeCases($directory);
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if ($edgeCaseResult !== null) {
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return $edgeCaseResult;
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}
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if (Platform::isWindows()) {
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$cmd = sprintf('rmdir /S /Q %s', ProcessExecutor::escape(realpath($directory)));
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} else {
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$cmd = sprintf('rm -rf %s', ProcessExecutor::escape($directory));
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}
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$result = $this->getProcess()->execute($cmd, $output) === 0;
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// clear stat cache because external processes aren't tracked by the php stat cache
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clearstatcache();
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if ($result && !is_dir($directory)) {
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return true;
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}
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return $this->removeDirectoryPhp($directory);
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}
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/**
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* Recursively remove a directory asynchronously
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*
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* Uses the process component if proc_open is enabled on the PHP
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* installation.
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*
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* @param string $directory
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* @throws \RuntimeException
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* @return PromiseInterface
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*/
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public function removeDirectoryAsync($directory)
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{
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$edgeCaseResult = $this->removeEdgeCases($directory);
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if ($edgeCaseResult !== null) {
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return \React\Promise\resolve($edgeCaseResult);
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}
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if (Platform::isWindows()) {
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$cmd = sprintf('rmdir /S /Q %s', ProcessExecutor::escape(realpath($directory)));
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} else {
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$cmd = sprintf('rm -rf %s', ProcessExecutor::escape($directory));
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}
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$promise = $this->getProcess()->executeAsync($cmd);
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$self = $this;
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return $promise->then(function ($process) use ($directory, $self) {
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// clear stat cache because external processes aren't tracked by the php stat cache
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clearstatcache();
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if ($process->isSuccessful()) {
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if (!is_dir($directory)) {
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return \React\Promise\resolve(true);
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}
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}
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return \React\Promise\resolve($self->removeDirectoryPhp($directory));
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});
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}
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/**
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* @param string $directory
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* @param bool $fallbackToPhp
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*
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* @return bool|null Returns null, when no edge case was hit. Otherwise a bool whether removal was successfull
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*/
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private function removeEdgeCases($directory, $fallbackToPhp = true)
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{
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if ($this->isSymlinkedDirectory($directory)) {
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return $this->unlinkSymlinkedDirectory($directory);
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}
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if ($this->isJunction($directory)) {
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return $this->removeJunction($directory);
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}
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if (is_link($directory)) {
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return unlink($directory);
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}
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if (!is_dir($directory) || !file_exists($directory)) {
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return true;
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}
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if (preg_match('{^(?:[a-z]:)?[/\\\\]+$}i', $directory)) {
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throw new \RuntimeException('Aborting an attempted deletion of '.$directory.', this was probably not intended, if it is a real use case please report it.');
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}
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if (!\function_exists('proc_open') && $fallbackToPhp) {
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return $this->removeDirectoryPhp($directory);
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}
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return null;
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}
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/**
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* Recursively delete directory using PHP iterators.
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*
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* Uses a CHILD_FIRST RecursiveIteratorIterator to sort files
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* before directories, creating a single non-recursive loop
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* to delete files/directories in the correct order.
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*
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* @param string $directory
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* @return bool
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*/
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public function removeDirectoryPhp($directory)
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{
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$edgeCaseResult = $this->removeEdgeCases($directory, false);
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if ($edgeCaseResult !== null) {
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return $edgeCaseResult;
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}
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try {
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$it = new RecursiveDirectoryIterator($directory, RecursiveDirectoryIterator::SKIP_DOTS);
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} catch (\UnexpectedValueException $e) {
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// re-try once after clearing the stat cache if it failed as it
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// sometimes fails without apparent reason, see https://github.com/composer/composer/issues/4009
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clearstatcache();
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usleep(100000);
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if (!is_dir($directory)) {
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return true;
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}
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$it = new RecursiveDirectoryIterator($directory, RecursiveDirectoryIterator::SKIP_DOTS);
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}
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$ri = new RecursiveIteratorIterator($it, RecursiveIteratorIterator::CHILD_FIRST);
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foreach ($ri as $file) {
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if ($file->isDir()) {
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$this->rmdir($file->getPathname());
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} else {
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$this->unlink($file->getPathname());
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}
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}
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// release locks on the directory, see https://github.com/composer/composer/issues/9945
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unset($ri, $it, $file);
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return $this->rmdir($directory);
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}
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/**
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* @param string $directory
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*
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* @return void
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*/
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public function ensureDirectoryExists($directory)
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{
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if (!is_dir($directory)) {
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if (file_exists($directory)) {
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throw new \RuntimeException(
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$directory.' exists and is not a directory.'
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);
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}
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if (!@mkdir($directory, 0777, true)) {
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throw new \RuntimeException(
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$directory.' does not exist and could not be created.'
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);
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}
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}
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}
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/**
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* Attempts to unlink a file and in case of failure retries after 350ms on windows
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*
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* @param string $path
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* @throws \RuntimeException
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* @return bool
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*/
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public function unlink($path)
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{
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$unlinked = @$this->unlinkImplementation($path);
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if (!$unlinked) {
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// retry after a bit on windows since it tends to be touchy with mass removals
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if (Platform::isWindows()) {
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usleep(350000);
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$unlinked = @$this->unlinkImplementation($path);
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}
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if (!$unlinked) {
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$error = error_get_last();
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$message = 'Could not delete '.$path.': ' . @$error['message'];
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if (Platform::isWindows()) {
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$message .= "\nThis can be due to an antivirus or the Windows Search Indexer locking the file while they are analyzed";
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}
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throw new \RuntimeException($message);
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}
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}
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return true;
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}
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/**
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* Attempts to rmdir a file and in case of failure retries after 350ms on windows
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*
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* @param string $path
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* @throws \RuntimeException
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* @return bool
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*/
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public function rmdir($path)
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{
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$deleted = @rmdir($path);
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if (!$deleted) {
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// retry after a bit on windows since it tends to be touchy with mass removals
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if (Platform::isWindows()) {
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usleep(350000);
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$deleted = @rmdir($path);
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}
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if (!$deleted) {
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$error = error_get_last();
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$message = 'Could not delete '.$path.': ' . @$error['message'];
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if (Platform::isWindows()) {
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$message .= "\nThis can be due to an antivirus or the Windows Search Indexer locking the file while they are analyzed";
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}
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throw new \RuntimeException($message);
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}
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}
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return true;
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}
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/**
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* Copy then delete is a non-atomic version of {@link rename}.
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*
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* Some systems can't rename and also don't have proc_open,
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* which requires this solution.
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*
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* @param string $source
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* @param string $target
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*
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* @return void
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*/
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public function copyThenRemove($source, $target)
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{
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$this->copy($source, $target);
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if (!is_dir($source)) {
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$this->unlink($source);
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return;
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}
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$this->removeDirectoryPhp($source);
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}
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/**
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* Copies a file or directory from $source to $target.
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*
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* @param string $source
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* @param string $target
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* @return bool
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*/
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public function copy($source, $target)
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{
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if (!is_dir($source)) {
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return copy($source, $target);
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}
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$it = new RecursiveDirectoryIterator($source, RecursiveDirectoryIterator::SKIP_DOTS);
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$ri = new RecursiveIteratorIterator($it, RecursiveIteratorIterator::SELF_FIRST);
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$this->ensureDirectoryExists($target);
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$result = true;
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/** @var RecursiveDirectoryIterator $ri */
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foreach ($ri as $file) {
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$targetPath = $target . DIRECTORY_SEPARATOR . $ri->getSubPathname();
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if ($file->isDir()) {
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$this->ensureDirectoryExists($targetPath);
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} else {
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$result = $result && copy($file->getPathname(), $targetPath);
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}
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}
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return $result;
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}
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/**
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* @param string $source
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* @param string $target
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*
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* @return void
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*/
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public function rename($source, $target)
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{
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if (true === @rename($source, $target)) {
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return;
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}
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if (!\function_exists('proc_open')) {
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$this->copyThenRemove($source, $target);
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return;
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}
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if (Platform::isWindows()) {
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// Try to copy & delete - this is a workaround for random "Access denied" errors.
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$command = sprintf('xcopy %s %s /E /I /Q /Y', ProcessExecutor::escape($source), ProcessExecutor::escape($target));
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$result = $this->getProcess()->execute($command, $output);
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// clear stat cache because external processes aren't tracked by the php stat cache
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clearstatcache();
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if (0 === $result) {
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$this->remove($source);
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return;
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}
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} else {
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// We do not use PHP's "rename" function here since it does not support
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// the case where $source, and $target are located on different partitions.
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$command = sprintf('mv %s %s', ProcessExecutor::escape($source), ProcessExecutor::escape($target));
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$result = $this->getProcess()->execute($command, $output);
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// clear stat cache because external processes aren't tracked by the php stat cache
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clearstatcache();
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if (0 === $result) {
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return;
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}
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}
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$this->copyThenRemove($source, $target);
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}
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/**
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* Returns the shortest path from $from to $to
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*
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* @param string $from
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* @param string $to
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* @param bool $directories if true, the source/target are considered to be directories
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* @throws \InvalidArgumentException
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* @return string
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*/
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public function findShortestPath($from, $to, $directories = false)
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{
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if (!$this->isAbsolutePath($from) || !$this->isAbsolutePath($to)) {
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throw new \InvalidArgumentException(sprintf('$from (%s) and $to (%s) must be absolute paths.', $from, $to));
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}
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$from = lcfirst($this->normalizePath($from));
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$to = lcfirst($this->normalizePath($to));
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if ($directories) {
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$from = rtrim($from, '/') . '/dummy_file';
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}
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if (\dirname($from) === \dirname($to)) {
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return './'.basename($to);
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}
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$commonPath = $to;
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while (strpos($from.'/', $commonPath.'/') !== 0 && '/' !== $commonPath && !preg_match('{^[a-z]:/?$}i', $commonPath)) {
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$commonPath = strtr(\dirname($commonPath), '\\', '/');
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}
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if (0 !== strpos($from, $commonPath) || '/' === $commonPath) {
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return $to;
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}
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$commonPath = rtrim($commonPath, '/') . '/';
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$sourcePathDepth = substr_count(substr($from, \strlen($commonPath)), '/');
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$commonPathCode = str_repeat('../', $sourcePathDepth);
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return ($commonPathCode . substr($to, \strlen($commonPath))) ?: './';
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}
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/**
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* Returns PHP code that, when executed in $from, will return the path to $to
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*
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* @param string $from
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* @param string $to
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* @param bool $directories if true, the source/target are considered to be directories
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* @param bool $staticCode
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* @throws \InvalidArgumentException
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* @return string
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*/
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public function findShortestPathCode($from, $to, $directories = false, $staticCode = false)
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{
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if (!$this->isAbsolutePath($from) || !$this->isAbsolutePath($to)) {
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throw new \InvalidArgumentException(sprintf('$from (%s) and $to (%s) must be absolute paths.', $from, $to));
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}
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$from = lcfirst($this->normalizePath($from));
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$to = lcfirst($this->normalizePath($to));
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if ($from === $to) {
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return $directories ? '__DIR__' : '__FILE__';
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}
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$commonPath = $to;
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while (strpos($from.'/', $commonPath.'/') !== 0 && '/' !== $commonPath && !preg_match('{^[a-z]:/?$}i', $commonPath) && '.' !== $commonPath) {
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$commonPath = strtr(\dirname($commonPath), '\\', '/');
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}
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if (0 !== strpos($from, $commonPath) || '/' === $commonPath || '.' === $commonPath) {
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return var_export($to, true);
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}
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$commonPath = rtrim($commonPath, '/') . '/';
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if (strpos($to, $from.'/') === 0) {
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return '__DIR__ . '.var_export(substr($to, \strlen($from)), true);
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}
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$sourcePathDepth = substr_count(substr($from, \strlen($commonPath)), '/') + $directories;
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if ($staticCode) {
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$commonPathCode = "__DIR__ . '".str_repeat('/..', $sourcePathDepth)."'";
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} else {
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$commonPathCode = str_repeat('dirname(', $sourcePathDepth).'__DIR__'.str_repeat(')', $sourcePathDepth);
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}
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$relTarget = substr($to, \strlen($commonPath));
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return $commonPathCode . (\strlen($relTarget) ? '.' . var_export('/' . $relTarget, true) : '');
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}
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/**
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* Checks if the given path is absolute
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*
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* @param string $path
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* @return bool
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*/
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public function isAbsolutePath($path)
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{
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return strpos($path, '/') === 0 || substr($path, 1, 1) === ':' || strpos($path, '\\\\') === 0;
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}
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/**
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* Returns size of a file or directory specified by path. If a directory is
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* given, its size will be computed recursively.
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*
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* @param string $path Path to the file or directory
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* @throws \RuntimeException
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* @return int
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*/
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public function size($path)
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{
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if (!file_exists($path)) {
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throw new \RuntimeException("$path does not exist.");
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}
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if (is_dir($path)) {
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return $this->directorySize($path);
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}
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return filesize($path);
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}
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/**
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* Normalize a path. This replaces backslashes with slashes, removes ending
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* slash and collapses redundant separators and up-level references.
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|
*
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* @param string $path Path to the file or directory
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* @return string
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*/
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public function normalizePath($path)
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{
|
|
$parts = array();
|
|
$path = strtr($path, '\\', '/');
|
|
$prefix = '';
|
|
$absolute = '';
|
|
|
|
// extract windows UNC paths e.g. \\foo\bar
|
|
if (strpos($path, '//') === 0 && \strlen($path) > 2) {
|
|
$absolute = '//';
|
|
$path = substr($path, 2);
|
|
}
|
|
|
|
// extract a prefix being a protocol://, protocol:, protocol://drive: or simply drive:
|
|
if (preg_match('{^( [0-9a-z]{2,}+: (?: // (?: [a-z]: )? )? | [a-z]: )}ix', $path, $match)) {
|
|
$prefix = $match[1];
|
|
$path = substr($path, \strlen($prefix));
|
|
}
|
|
|
|
if (strpos($path, '/') === 0) {
|
|
$absolute = '/';
|
|
$path = substr($path, 1);
|
|
}
|
|
|
|
$up = false;
|
|
foreach (explode('/', $path) as $chunk) {
|
|
if ('..' === $chunk && ($absolute !== '' || $up)) {
|
|
array_pop($parts);
|
|
$up = !(empty($parts) || '..' === end($parts));
|
|
} elseif ('.' !== $chunk && '' !== $chunk) {
|
|
$parts[] = $chunk;
|
|
$up = '..' !== $chunk;
|
|
}
|
|
}
|
|
|
|
return $prefix.((string) $absolute).implode('/', $parts);
|
|
}
|
|
|
|
/**
|
|
* Remove trailing slashes if present to avoid issues with symlinks
|
|
*
|
|
* And other possible unforeseen disasters, see https://github.com/composer/composer/pull/9422
|
|
*
|
|
* @param string $path
|
|
* @return string
|
|
*/
|
|
public static function trimTrailingSlash($path)
|
|
{
|
|
if (!preg_match('{^[/\\\\]+$}', $path)) {
|
|
$path = rtrim($path, '/\\');
|
|
}
|
|
|
|
return $path;
|
|
}
|
|
|
|
/**
|
|
* Return if the given path is local
|
|
*
|
|
* @param string $path
|
|
* @return bool
|
|
*/
|
|
public static function isLocalPath($path)
|
|
{
|
|
return (bool) preg_match('{^(file://(?!//)|/(?!/)|/?[a-z]:[\\\\/]|\.\.[\\\\/]|[a-z0-9_.-]+[\\\\/])}i', $path);
|
|
}
|
|
|
|
/**
|
|
* @param string $path
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function getPlatformPath($path)
|
|
{
|
|
if (Platform::isWindows()) {
|
|
$path = preg_replace('{^(?:file:///([a-z]):?/)}i', 'file://$1:/', $path);
|
|
}
|
|
|
|
return (string) preg_replace('{^file://}i', '', $path);
|
|
}
|
|
|
|
/**
|
|
* Cross-platform safe version of is_readable()
|
|
*
|
|
* This will also check for readability by reading the file as is_readable can not be trusted on network-mounts
|
|
* and \\wsl$ paths. See https://github.com/composer/composer/issues/8231 and https://bugs.php.net/bug.php?id=68926
|
|
*
|
|
* @param string $path
|
|
* @return bool
|
|
*/
|
|
public static function isReadable($path)
|
|
{
|
|
if (is_readable($path)) {
|
|
return true;
|
|
}
|
|
|
|
if (is_file($path)) {
|
|
return false !== Silencer::call('file_get_contents', $path, false, null, 0, 1);
|
|
}
|
|
|
|
if (is_dir($path)) {
|
|
return false !== Silencer::call('opendir', $path);
|
|
}
|
|
|
|
// assume false otherwise
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param string $directory
|
|
*
|
|
* @return int
|
|
*/
|
|
protected function directorySize($directory)
|
|
{
|
|
$it = new RecursiveDirectoryIterator($directory, RecursiveDirectoryIterator::SKIP_DOTS);
|
|
$ri = new RecursiveIteratorIterator($it, RecursiveIteratorIterator::CHILD_FIRST);
|
|
|
|
$size = 0;
|
|
foreach ($ri as $file) {
|
|
if ($file->isFile()) {
|
|
$size += $file->getSize();
|
|
}
|
|
}
|
|
|
|
return $size;
|
|
}
|
|
|
|
/**
|
|
* @return ProcessExecutor
|
|
*/
|
|
protected function getProcess()
|
|
{
|
|
if (!$this->processExecutor) {
|
|
$this->processExecutor = new ProcessExecutor();
|
|
}
|
|
|
|
return $this->processExecutor;
|
|
}
|
|
|
|
/**
|
|
* delete symbolic link implementation (commonly known as "unlink()")
|
|
*
|
|
* symbolic links on windows which link to directories need rmdir instead of unlink
|
|
*
|
|
* @param string $path
|
|
*
|
|
* @return bool
|
|
*/
|
|
private function unlinkImplementation($path)
|
|
{
|
|
if (Platform::isWindows() && is_dir($path) && is_link($path)) {
|
|
return rmdir($path);
|
|
}
|
|
|
|
return unlink($path);
|
|
}
|
|
|
|
/**
|
|
* Creates a relative symlink from $link to $target
|
|
*
|
|
* @param string $target The path of the binary file to be symlinked
|
|
* @param string $link The path where the symlink should be created
|
|
* @return bool
|
|
*/
|
|
public function relativeSymlink($target, $link)
|
|
{
|
|
if (!function_exists('symlink')) {
|
|
return false;
|
|
}
|
|
|
|
$cwd = getcwd();
|
|
|
|
$relativePath = $this->findShortestPath($link, $target);
|
|
chdir(\dirname($link));
|
|
$result = @symlink($relativePath, $link);
|
|
|
|
chdir($cwd);
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* return true if that directory is a symlink.
|
|
*
|
|
* @param string $directory
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function isSymlinkedDirectory($directory)
|
|
{
|
|
if (!is_dir($directory)) {
|
|
return false;
|
|
}
|
|
|
|
$resolved = $this->resolveSymlinkedDirectorySymlink($directory);
|
|
|
|
return is_link($resolved);
|
|
}
|
|
|
|
/**
|
|
* @param string $directory
|
|
*
|
|
* @return bool
|
|
*/
|
|
private function unlinkSymlinkedDirectory($directory)
|
|
{
|
|
$resolved = $this->resolveSymlinkedDirectorySymlink($directory);
|
|
|
|
return $this->unlink($resolved);
|
|
}
|
|
|
|
/**
|
|
* resolve pathname to symbolic link of a directory
|
|
*
|
|
* @param string $pathname directory path to resolve
|
|
*
|
|
* @return string resolved path to symbolic link or original pathname (unresolved)
|
|
*/
|
|
private function resolveSymlinkedDirectorySymlink($pathname)
|
|
{
|
|
if (!is_dir($pathname)) {
|
|
return $pathname;
|
|
}
|
|
|
|
$resolved = rtrim($pathname, '/');
|
|
|
|
if (!\strlen($resolved)) {
|
|
return $pathname;
|
|
}
|
|
|
|
return $resolved;
|
|
}
|
|
|
|
/**
|
|
* Creates an NTFS junction.
|
|
*
|
|
* @param string $target
|
|
* @param string $junction
|
|
*
|
|
* @return void
|
|
*/
|
|
public function junction($target, $junction)
|
|
{
|
|
if (!Platform::isWindows()) {
|
|
throw new \LogicException(sprintf('Function %s is not available on non-Windows platform', __CLASS__));
|
|
}
|
|
if (!is_dir($target)) {
|
|
throw new IOException(sprintf('Cannot junction to "%s" as it is not a directory.', $target), 0, null, $target);
|
|
}
|
|
$cmd = sprintf(
|
|
'mklink /J %s %s',
|
|
ProcessExecutor::escape(str_replace('/', DIRECTORY_SEPARATOR, $junction)),
|
|
ProcessExecutor::escape(realpath($target))
|
|
);
|
|
if ($this->getProcess()->execute($cmd, $output) !== 0) {
|
|
throw new IOException(sprintf('Failed to create junction to "%s" at "%s".', $target, $junction), 0, null, $target);
|
|
}
|
|
clearstatcache(true, $junction);
|
|
}
|
|
|
|
/**
|
|
* Returns whether the target directory is a Windows NTFS Junction.
|
|
*
|
|
* We test if the path is a directory and not an ordinary link, then check
|
|
* that the mode value returned from lstat (which gives the status of the
|
|
* link itself) is not a directory, by replicating the POSIX S_ISDIR test.
|
|
*
|
|
* This logic works because PHP does not set the mode value for a junction,
|
|
* since there is no universal file type flag for it. Unfortunately an
|
|
* uninitialized variable in PHP prior to 7.2.16 and 7.3.3 may cause a
|
|
* random value to be returned. See https://bugs.php.net/bug.php?id=77552
|
|
*
|
|
* If this random value passes the S_ISDIR test, then a junction will not be
|
|
* detected and a recursive delete operation could lead to loss of data in
|
|
* the target directory. Note that Windows rmdir can handle this situation
|
|
* and will only delete the junction (from Windows 7 onwards).
|
|
*
|
|
* @param string $junction Path to check.
|
|
* @return bool
|
|
*/
|
|
public function isJunction($junction)
|
|
{
|
|
if (!Platform::isWindows()) {
|
|
return false;
|
|
}
|
|
|
|
// Important to clear all caches first
|
|
clearstatcache(true, $junction);
|
|
|
|
if (!is_dir($junction) || is_link($junction)) {
|
|
return false;
|
|
}
|
|
|
|
$stat = lstat($junction);
|
|
|
|
// S_ISDIR test (S_IFDIR is 0x4000, S_IFMT is 0xF000 bitmask)
|
|
return $stat ? 0x4000 !== ($stat['mode'] & 0xF000) : false;
|
|
}
|
|
|
|
/**
|
|
* Removes a Windows NTFS junction.
|
|
*
|
|
* @param string $junction
|
|
* @return bool
|
|
*/
|
|
public function removeJunction($junction)
|
|
{
|
|
if (!Platform::isWindows()) {
|
|
return false;
|
|
}
|
|
$junction = rtrim(str_replace('/', DIRECTORY_SEPARATOR, $junction), DIRECTORY_SEPARATOR);
|
|
if (!$this->isJunction($junction)) {
|
|
throw new IOException(sprintf('%s is not a junction and thus cannot be removed as one', $junction));
|
|
}
|
|
|
|
return $this->rmdir($junction);
|
|
}
|
|
|
|
/**
|
|
* @param string $path
|
|
* @param string $content
|
|
*
|
|
* @return int|false
|
|
*/
|
|
public function filePutContentsIfModified($path, $content)
|
|
{
|
|
$currentContent = @file_get_contents($path);
|
|
if (!$currentContent || ($currentContent != $content)) {
|
|
return file_put_contents($path, $content);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Copy file using stream_copy_to_stream to work around https://bugs.php.net/bug.php?id=6463
|
|
*
|
|
* @param string $source
|
|
* @param string $target
|
|
*
|
|
* @return void
|
|
*/
|
|
public function safeCopy($source, $target)
|
|
{
|
|
if (!file_exists($target) || !file_exists($source) || !$this->filesAreEqual($source, $target)) {
|
|
$source = fopen($source, 'r');
|
|
$target = fopen($target, 'w+');
|
|
|
|
stream_copy_to_stream($source, $target);
|
|
fclose($source);
|
|
fclose($target);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* compare 2 files
|
|
* https://stackoverflow.com/questions/3060125/can-i-use-file-get-contents-to-compare-two-files
|
|
*
|
|
* @param string $a
|
|
* @param string $b
|
|
*
|
|
* @return bool
|
|
*/
|
|
private function filesAreEqual($a, $b)
|
|
{
|
|
// Check if filesize is different
|
|
if (filesize($a) !== filesize($b)) {
|
|
return false;
|
|
}
|
|
|
|
// Check if content is different
|
|
$ah = fopen($a, 'rb');
|
|
$bh = fopen($b, 'rb');
|
|
|
|
$result = true;
|
|
while (!feof($ah)) {
|
|
if (fread($ah, 8192) != fread($bh, 8192)) {
|
|
$result = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
fclose($ah);
|
|
fclose($bh);
|
|
|
|
return $result;
|
|
}
|
|
}
|