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SelfUpdate.php
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SelfUpdate.php
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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;
use Psy\Shell;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
/**
* Self update command.
*
* If a new version is available, this command will download it and replace the currently installed version
*/
class SelfUpdate
{
const URL_PREFIX = 'https://github.com/bobthecow/psysh/releases/download';
const SUCCESS = 0;
const FAILURE = 1;
private Checker $checker;
private Installer $installer;
private ?Downloader $downloader = null;
public function __construct(Checker $checker, Installer $installer)
{
$this->checker = $checker;
$this->installer = $installer;
}
/**
* Allow the downloader to be injected for testing.
*
* @return void
*/
public function setDownloader(Downloader $downloader)
{
$this->downloader = $downloader;
}
/**
* Get the currently set Downloader or create one based on the capabilities of the php environment.
*
* @throws ErrorException if a downloader cannot be created for the php environment
*/
private function getDownloader(): Downloader
{
if (!isset($this->downloader)) {
return Downloader\Factory::getDownloader();
}
return $this->downloader;
}
/**
* Build the download URL for the latest release.
*
* The file name used in the URL will include the flavour postfix extracted from the current version
* if it's present
*/
private function getAssetUrl(string $latestVersion): string
{
$versionPostfix = '';
if (\strpos(Shell::VERSION, '+')) {
$versionPostfix = '-'.\substr(Shell::VERSION, \strpos(Shell::VERSION, '+') + 1);
}
$downloadFilename = \sprintf('psysh-%s%s.tar.gz', $latestVersion, $versionPostfix);
// check if latest release data contains an asset matching the filename?
return \sprintf('%s/%s/%s', self::URL_PREFIX, $latestVersion, $downloadFilename);
}
/**
* Execute the self-update process.
*
* @throws ErrorException if the current version is not restored when installation fails
*/
public function run(InputInterface $input, OutputInterface $output): int
{
$currentVersion = Shell::VERSION;
// already have the latest version?
if ($this->checker->isLatest()) {
// current version is latest version...
$output->writeln('<info>Current version is up-to-date.</info>');
return self::SUCCESS;
}
// can overwrite current version?
if (!$this->installer->isInstallLocationWritable()) {
$output->writeln('<error>Installed version is not writable.</error>');
return self::FAILURE;
}
// can download to, and create a backup in the temp directory?
if (!$this->installer->isTempDirectoryWritable()) {
$output->writeln('<error>Temporary directory is not writable.</error>');
return self::FAILURE;
}
$latestVersion = $this->checker->getLatest();
$downloadUrl = $this->getAssetUrl($latestVersion);
$output->write("Downloading PsySH $latestVersion ...");
try {
$downloader = $this->getDownloader();
$downloader->setTempDir($this->installer->getTempDirectory());
$downloaded = $downloader->download($downloadUrl);
} catch (ErrorException $e) {
$output->write(' <error>Failed.</error>');
$output->writeln(\sprintf('<error>%s</error>', $e->getMessage()));
return self::FAILURE;
}
if (!$downloaded) {
$output->writeln('<error>Download failed.</error>');
$downloader->cleanup();
return self::FAILURE;
} else {
$output->write(' <info>OK</info>'.\PHP_EOL);
}
$downloadedFile = $downloader->getFilename();
if (!$this->installer->isValidSource($downloadedFile)) {
$downloader->cleanup();
$output->writeln('<error>Downloaded file is not a valid archive.</error>');
return self::FAILURE;
}
// create backup as bin.old-version in the temporary directory
$backupCreated = $this->installer->createBackup($currentVersion);
if (!$backupCreated) {
$downloader->cleanup();
$output->writeln('<error>Failed to create a backup of the current version.</error>');
return self::FAILURE;
} elseif ($input->getOption('verbose')) {
$backupFilename = $this->installer->getBackupFilename($currentVersion);
$output->writeln('Created backup of current version: '.$backupFilename);
}
if (!$this->installer->install($downloadedFile)) {
$this->installer->restoreFromBackup($currentVersion);
$downloader->cleanup();
$output->writeln("<error>Failed to install new PsySH version $latestVersion.</error>");
return self::FAILURE;
}
// Remove the downloaded archive file from the temporary directory
$downloader->cleanup();
$output->writeln("Updated PsySH from $currentVersion to <info>$latestVersion</info>");
return self::SUCCESS;
}
}

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SelfUpdate.php (5 KB)

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