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Work around collisions in backup names

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This commit is contained in:
Dylan K. Taylor 2019-03-03 18:59:37 +00:00
parent a0a8026cba
commit 8d83d59cf0
1 changed files with 11 additions and 9 deletions
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20
src/pocketmine/level/format/io/FormatConverter.php
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@ -25,11 +25,12 @@ namespace pocketmine\level\format\io;
use pocketmine\utils\Utils;
use function basename;
use function crc32;
use function file_exists;
use function floor;
use function is_dir;
use function microtime;
use function mkdir;
use function random_bytes;
use function rename;
use function round;
use function rtrim;
@ -52,15 +53,16 @@ class FormatConverter{
$this->oldProvider = $oldProvider;
Utils::testValidInstance($newProvider, WritableLevelProvider::class);
$this->newProvider = $newProvider;
$this->backupPath = $backupPath . DIRECTORY_SEPARATOR . basename($this->oldProvider->getPath());
if(!file_exists($backupPath)){
@mkdir($backupPath);
}elseif(!is_dir($backupPath)){
throw new \RuntimeException("Backup path $backupPath exists and is not a directory");
}
$this->logger = new \PrefixedLogger($logger, "World Converter - " . $this->oldProvider->getLevelData()->getName());
if(!file_exists($backupPath)){
@mkdir($backupPath, 0777, true);
}
$nextSuffix = "";
do{
$this->backupPath = $backupPath . DIRECTORY_SEPARATOR . basename($this->oldProvider->getPath()) . $nextSuffix;
$nextSuffix = "_" . crc32(random_bytes(4));
}while(file_exists($this->backupPath));
}
public function getBackupPath() : string{