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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2023 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy\VersionUpdater;
use Psy\Exception\ErrorException;
class Installer
{
/**
* @var string
*/
protected $installLocation;
/**
* @var string
*/
protected $tempDirectory;
public function __construct(?string $tempDirectory = null)
{
$this->tempDirectory = $tempDirectory ?: \sys_get_temp_dir();
$this->installLocation = \Phar::running(false);
}
/**
* Public to allow the Downloader to use the temporary directory if it's been set.
*/
public function getTempDirectory(): string
{
return $this->tempDirectory;
}
/**
* Verify the currently installed PsySH phar is writable so it can be replaced.
*/
public function isInstallLocationWritable(): bool
{
return \is_writable($this->installLocation);
}
/**
* Verify the temporary directory is writable so downloads and backups can be saved there.
*/
public function isTempDirectoryWritable(): bool
{
return \is_writable($this->tempDirectory);
}
/**
* Verifies the downloaded archive can be extracted with \PharData.
*
* @param string $sourceArchive
*/
public function isValidSource(string $sourceArchive): bool
{
if (!\class_exists('\PharData')) {
return false;
}
$pharArchive = new \PharData($sourceArchive);
return $pharArchive->valid();
}
/**
* Extract the "psysh" phar from the archive and move it, replacing the currently installed phar.
*
* @param string $sourceArchive
*/
public function install(string $sourceArchive): bool
{
$pharArchive = new \PharData($sourceArchive);
$outputDirectory = \tempnam($this->tempDirectory, 'psysh-');
// remove the temp file, and replace it with a sub-directory
if (!\unlink($outputDirectory) || !\mkdir($outputDirectory, 0700)) {
return false;
}
$pharArchive->extractTo($outputDirectory, ['psysh'], true);
$renamed = \rename($outputDirectory.'/psysh', $this->installLocation);
// Remove the sub-directory created to extract the psysh binary/phar
\rmdir($outputDirectory);
return $renamed;
}
/**
* Create a backup of the currently installed PsySH phar in the temporary directory with a version number postfix.
*
* @param string $version
*/
public function createBackup(string $version): bool
{
$backupFilename = $this->getBackupFilename($version);
if (\file_exists($backupFilename) && !\is_writable($backupFilename)) {
return false;
}
return \rename($this->installLocation, $backupFilename);
}
/**
* Restore the backup file to the original PsySH install location.
*
* @param string $version
*
* @throws ErrorException If the backup file could not be found
*/
public function restoreFromBackup(string $version): bool
{
$backupFilename = $this->getBackupFilename($version);
if (!\file_exists($backupFilename)) {
throw new ErrorException("Cannot restore from backup. File not found! [{$backupFilename}]");
}
return \rename($backupFilename, $this->installLocation);
}
/**
* Get the full path for the backup target file location.
*
* @param string $version
*/
public function getBackupFilename(string $version): string
{
$installFilename = \basename($this->installLocation);
return \sprintf('%s/%s.%s', $this->tempDirectory, $installFilename, $version);
}
}
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