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<?php
/*
* This file is part of Composer.
*
* (c) Nils Adermann <naderman@naderman.de>
* Jordi Boggiano <j.boggiano@seld.be>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Composer\Installer;
use Composer\Package\PackageInterface;
use Composer\Repository\InstalledRepositoryInterface;
use InvalidArgumentException;
use React\Promise\PromiseInterface;
/**
* Interface for the package installation manager.
*
* @author Konstantin Kudryashov <ever.zet@gmail.com>
* @author Jordi Boggiano <j.boggiano@seld.be>
*/
interface InstallerInterface
{
/**
* Decides if the installer supports the given type
*
* @param string $packageType
* @return bool
*/
public function supports($packageType);
/**
* Checks that provided package is installed.
*
* @param InstalledRepositoryInterface $repo repository in which to check
* @param PackageInterface $package package instance
*
* @return bool
*/
public function isInstalled(InstalledRepositoryInterface $repo, PackageInterface $package);
/**
* Downloads the files needed to later install the given package.
*
* @param PackageInterface $package package instance
* @param PackageInterface $prevPackage previous package instance in case of an update
* @return PromiseInterface|null
*/
public function download(PackageInterface $package, PackageInterface $prevPackage = null);
/**
* Do anything that needs to be done between all downloads have been completed and the actual operation is executed
*
* All packages get first downloaded, then all together prepared, then all together installed/updated/uninstalled. Therefore
* for error recovery it is important to avoid failing during install/update/uninstall as much as possible, and risky things or
* user prompts should happen in the prepare step rather. In case of failure, cleanup() will be called so that changes can
* be undone as much as possible.
*
* @param string $type one of install/update/uninstall
* @param PackageInterface $package package instance
* @param PackageInterface $prevPackage previous package instance in case of an update
* @return PromiseInterface|null
*/
public function prepare($type, PackageInterface $package, PackageInterface $prevPackage = null);
/**
* Installs specific package.
*
* @param InstalledRepositoryInterface $repo repository in which to check
* @param PackageInterface $package package instance
* @return PromiseInterface|null
*/
public function install(InstalledRepositoryInterface $repo, PackageInterface $package);
/**
* Updates specific package.
*
* @param InstalledRepositoryInterface $repo repository in which to check
* @param PackageInterface $initial already installed package version
* @param PackageInterface $target updated version
* @throws InvalidArgumentException if $initial package is not installed
* @return PromiseInterface|null
*/
public function update(InstalledRepositoryInterface $repo, PackageInterface $initial, PackageInterface $target);
/**
* Uninstalls specific package.
*
* @param InstalledRepositoryInterface $repo repository in which to check
* @param PackageInterface $package package instance
* @return PromiseInterface|null
*/
public function uninstall(InstalledRepositoryInterface $repo, PackageInterface $package);
/**
* Do anything to cleanup changes applied in the prepare or install/update/uninstall steps
*
* Note that cleanup will be called for all packages regardless if they failed an operation or not, to give
* all installers a change to cleanup things they did previously, so you need to keep track of changes
* applied in the installer/downloader themselves.
*
* @param string $type one of install/update/uninstall
* @param PackageInterface $package package instance
* @param PackageInterface $prevPackage previous package instance in case of an update
* @return PromiseInterface|null
*/
public function cleanup($type, PackageInterface $package, PackageInterface $prevPackage = null);
/**
* Returns the installation path of a package
*
* @param PackageInterface $package
* @return string path to install to, which MUST not end with a slash
*/
public function getInstallPath(PackageInterface $package);
}
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