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File Content: `DownloadManager.php`

<?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\Downloader;

use Composer\Package\PackageInterface;
use Composer\IO\IOInterface;
use Composer\Pcre\Preg;
use Composer\Util\Filesystem;
use Composer\Exception\IrrecoverableDownloadException;
use React\Promise\PromiseInterface;

/**
 * Downloaders manager.
 *
 * @author Konstantin Kudryashov <ever.zet@gmail.com>
 */
class DownloadManager
{
    /** @var IOInterface */
    private $io;
    /** @var bool */
    private $preferDist = false;
    /** @var bool */
    private $preferSource;
    /** @var array<string, string> */
    private $packagePreferences = array();
    /** @var Filesystem */
    private $filesystem;
    /** @var array<string, DownloaderInterface> */
    private $downloaders = array();

    /**
     * Initializes download manager.
     *
     * @param IOInterface     $io           The Input Output Interface
     * @param bool            $preferSource prefer downloading from source
     * @param Filesystem|null $filesystem   custom Filesystem object
     */
    public function __construct(IOInterface $io, $preferSource = false, Filesystem $filesystem = null)
    {
        $this->io = $io;
        $this->preferSource = $preferSource;
        $this->filesystem = $filesystem ?: new Filesystem();
    }

    /**
     * Makes downloader prefer source installation over the dist.
     *
     * @param  bool            $preferSource prefer downloading from source
     * @return DownloadManager
     */
    public function setPreferSource($preferSource)
    {
        $this->preferSource = $preferSource;

        return $this;
    }

    /**
     * Makes downloader prefer dist installation over the source.
     *
     * @param  bool            $preferDist prefer downloading from dist
     * @return DownloadManager
     */
    public function setPreferDist($preferDist)
    {
        $this->preferDist = $preferDist;

        return $this;
    }

    /**
     * Sets fine tuned preference settings for package level source/dist selection.
     *
     * @param array<string, string> $preferences array of preferences by package patterns
     *
     * @return DownloadManager
     */
    public function setPreferences(array $preferences)
    {
        $this->packagePreferences = $preferences;

        return $this;
    }

    /**
     * Sets installer downloader for a specific installation type.
     *
     * @param  string              $type       installation type
     * @param  DownloaderInterface $downloader downloader instance
     * @return DownloadManager
     */
    public function setDownloader($type, DownloaderInterface $downloader)
    {
        $type = strtolower($type);
        $this->downloaders[$type] = $downloader;

        return $this;
    }

    /**
     * Returns downloader for a specific installation type.
     *
     * @param  string                    $type installation type
     * @throws \InvalidArgumentException if downloader for provided type is not registered
     * @return DownloaderInterface
     */
    public function getDownloader($type)
    {
        $type = strtolower($type);
        if (!isset($this->downloaders[$type])) {
            throw new \InvalidArgumentException(sprintf('Unknown downloader type: %s. Available types: %s.', $type, implode(', ', array_keys($this->downloaders))));
        }

        return $this->downloaders[$type];
    }

    /**
     * Returns downloader for already installed package.
     *
     * @param  PackageInterface          $package package instance
     * @throws \InvalidArgumentException if package has no installation source specified
     * @throws \LogicException           if specific downloader used to load package with
     *                                           wrong type
     * @return DownloaderInterface|null
     */
    public function getDownloaderForPackage(PackageInterface $package)
    {
        $installationSource = $package->getInstallationSource();

        if ('metapackage' === $package->getType()) {
            return null;
        }

        if ('dist' === $installationSource) {
            $downloader = $this->getDownloader($package->getDistType());
        } elseif ('source' === $installationSource) {
            $downloader = $this->getDownloader($package->getSourceType());
        } else {
            throw new \InvalidArgumentException(
                'Package '.$package.' does not have an installation source set'
            );
        }

        if ($installationSource !== $downloader->getInstallationSource()) {
            throw new \LogicException(sprintf(
                'Downloader "%s" is a %s type downloader and can not be used to download %s for package %s',
                get_class($downloader),
                $downloader->getInstallationSource(),
                $installationSource,
                $package
            ));
        }

        return $downloader;
    }

    /**
     * @return string
     */
    public function getDownloaderType(DownloaderInterface $downloader)
    {
        return array_search($downloader, $this->downloaders);
    }

    /**
     * Downloads package into target dir.
     *
     * @param PackageInterface      $package     package instance
     * @param string                $targetDir   target dir
     * @param PackageInterface|null $prevPackage previous package instance in case of updates
     *
     * @throws \InvalidArgumentException if package have no urls to download from
     * @throws \RuntimeException
     * @return PromiseInterface
     */
    public function download(PackageInterface $package, $targetDir, PackageInterface $prevPackage = null)
    {
        $targetDir = $this->normalizeTargetDir($targetDir);
        $this->filesystem->ensureDirectoryExists(dirname($targetDir));

        $sources = $this->getAvailableSources($package, $prevPackage);

        $io = $this->io;
        $self = $this;

        $download = function ($retry = false) use (&$sources, $io, $package, $self, $targetDir, &$download, $prevPackage) {
            $source = array_shift($sources);
            if ($retry) {
                $io->writeError('    <warning>Now trying to download from ' . $source . '</warning>');
            }
            $package->setInstallationSource($source);

            $downloader = $self->getDownloaderForPackage($package);
            if (!$downloader) {
                return \React\Promise\resolve();
            }

            $handleError = function ($e) use ($sources, $source, $package, $io, $download) {
                if ($e instanceof \RuntimeException && !$e instanceof IrrecoverableDownloadException) {
                    if (!$sources) {
                        throw $e;
                    }

                    $io->writeError(
                        '    <warning>Failed to download '.
                        $package->getPrettyName().
                        ' from ' . $source . ': '.
                        $e->getMessage().'</warning>'
                    );

                    return $download(true);
                }

                throw $e;
            };

            try {
                $result = $downloader->download($package, $targetDir, $prevPackage);
            } catch (\Exception $e) {
                return $handleError($e);
            }
            if (!$result instanceof PromiseInterface) {
                return \React\Promise\resolve($result);
            }

            $res = $result->then(function ($res) {
                return $res;
            }, $handleError);

            return $res;
        };

        return $download();
    }

    /**
     * Prepares an operation execution
     *
     * @param string                $type        one of install/update/uninstall
     * @param PackageInterface      $package     package instance
     * @param string                $targetDir   target dir
     * @param PackageInterface|null $prevPackage previous package instance in case of updates
     *
     * @return PromiseInterface|null
     */
    public function prepare($type, PackageInterface $package, $targetDir, PackageInterface $prevPackage = null)
    {
        $targetDir = $this->normalizeTargetDir($targetDir);
        $downloader = $this->getDownloaderForPackage($package);
        if ($downloader) {
            return $downloader->prepare($type, $package, $targetDir, $prevPackage);
        }

        return \React\Promise\resolve();
    }

    /**
     * Installs package into target dir.
     *
     * @param PackageInterface $package   package instance
     * @param string           $targetDir target dir
     *
     * @throws \InvalidArgumentException if package have no urls to download from
     * @throws \RuntimeException
     * @return PromiseInterface|null
     */
    public function install(PackageInterface $package, $targetDir)
    {
        $targetDir = $this->normalizeTargetDir($targetDir);
        $downloader = $this->getDownloaderForPackage($package);
        if ($downloader) {
            return $downloader->install($package, $targetDir);
        }

        return \React\Promise\resolve();
    }

    /**
     * Updates package from initial to target version.
     *
     * @param PackageInterface $initial   initial package version
     * @param PackageInterface $target    target package version
     * @param string           $targetDir target dir
     *
     * @throws \InvalidArgumentException if initial package is not installed
     * @return PromiseInterface|null
     */
    public function update(PackageInterface $initial, PackageInterface $target, $targetDir)
    {
        $targetDir = $this->normalizeTargetDir($targetDir);
        $downloader = $this->getDownloaderForPackage($target);
        $initialDownloader = $this->getDownloaderForPackage($initial);

        // no downloaders present means update from metapackage to metapackage, nothing to do
        if (!$initialDownloader && !$downloader) {
            return \React\Promise\resolve();
        }

        // if we have a downloader present before, but not after, the package became a metapackage and its files should be removed
        if (!$downloader) {
            return $initialDownloader->remove($initial, $targetDir);
        }

        $initialType = $this->getDownloaderType($initialDownloader);
        $targetType = $this->getDownloaderType($downloader);
        if ($initialType === $targetType) {
            try {
                return $downloader->update($initial, $target, $targetDir);
            } catch (\RuntimeException $e) {
                if (!$this->io->isInteractive()) {
                    throw $e;
                }
                $this->io->writeError('<error>    Update failed ('.$e->getMessage().')</error>');
                if (!$this->io->askConfirmation('    Would you like to try reinstalling the package instead [<comment>yes</comment>]? ')) {
                    throw $e;
                }
            }
        }

        // if downloader type changed, or update failed and user asks for reinstall,
        // we wipe the dir and do a new install instead of updating it
        $promise = $initialDownloader->remove($initial, $targetDir);
        if ($promise) {
            $self = $this;

            return $promise->then(function ($res) use ($self, $target, $targetDir) {
                return $self->install($target, $targetDir);
            });
        }

        return $this->install($target, $targetDir);
    }

    /**
     * Removes package from target dir.
     *
     * @param PackageInterface $package   package instance
     * @param string           $targetDir target dir
     *
     * @return PromiseInterface|null
     */
    public function remove(PackageInterface $package, $targetDir)
    {
        $targetDir = $this->normalizeTargetDir($targetDir);
        $downloader = $this->getDownloaderForPackage($package);
        if ($downloader) {
            return $downloader->remove($package, $targetDir);
        }

        return \React\Promise\resolve();
    }

    /**
     * Cleans up a failed operation
     *
     * @param string                $type        one of install/update/uninstall
     * @param PackageInterface      $package     package instance
     * @param string                $targetDir   target dir
     * @param PackageInterface|null $prevPackage previous package instance in case of updates
     *
     * @return PromiseInterface|null
     */
    public function cleanup($type, PackageInterface $package, $targetDir, PackageInterface $prevPackage = null)
    {
        $targetDir = $this->normalizeTargetDir($targetDir);
        $downloader = $this->getDownloaderForPackage($package);
        if ($downloader) {
            return $downloader->cleanup($type, $package, $targetDir, $prevPackage);
        }

        return \React\Promise\resolve();
    }

    /**
     * Determines the install preference of a package
     *
     * @param PackageInterface $package package instance
     *
     * @return string
     */
    protected function resolvePackageInstallPreference(PackageInterface $package)
    {
        foreach ($this->packagePreferences as $pattern => $preference) {
            $pattern = '{^'.str_replace('\\*', '.*', preg_quote($pattern)).'$}i';
            if (Preg::isMatch($pattern, $package->getName())) {
                if ('dist' === $preference || (!$package->isDev() && 'auto' === $preference)) {
                    return 'dist';
                }

                return 'source';
            }
        }

        return $package->isDev() ? 'source' : 'dist';
    }

    /**
     * @return string[]
     * @phpstan-return array<'dist'|'source'>&non-empty-array
     */
    private function getAvailableSources(PackageInterface $package, PackageInterface $prevPackage = null)
    {
        $sourceType = $package->getSourceType();
        $distType = $package->getDistType();

        // add source before dist by default
        $sources = array();
        if ($sourceType) {
            $sources[] = 'source';
        }
        if ($distType) {
            $sources[] = 'dist';
        }

        if (empty($sources)) {
            throw new \InvalidArgumentException('Package '.$package.' must have a source or dist specified');
        }

        if (
            $prevPackage
            // if we are updating, we want to keep the same source as the previously installed package (if available in the new one)
            && in_array($prevPackage->getInstallationSource(), $sources, true)
            // unless the previous package was stable dist (by default) and the new package is dev, then we allow the new default to take over
            && !(!$prevPackage->isDev() && $prevPackage->getInstallationSource() === 'dist' && $package->isDev())
        ) {
            $prevSource = $prevPackage->getInstallationSource();
            usort($sources, function ($a, $b) use ($prevSource) {
                return $a === $prevSource ? -1 : 1;
            });

            return $sources;
        }

        // reverse sources in case dist is the preferred source for this package
        if (!$this->preferSource && ($this->preferDist || 'dist' === $this->resolvePackageInstallPreference($package))) {
            $sources = array_reverse($sources);
        }

        return $sources;
    }

    /**
     * Downloaders expect a /path/to/dir without trailing slash
     *
     * If any Installer provides a path with a trailing slash, this can cause bugs so make sure we remove them
     *
     * @param string $dir
     *
     * @return string
     */
    private function normalizeTargetDir($dir)
    {
        if ($dir === '\\' || $dir === '/') {
            return $dir;
        }

        return rtrim($dir, '\\/');
    }
}
Name	Size	Permission
ArchiveDownloader.php	8636 bytes	0644
ChangeReportInterface.php	766 bytes	0644
DownloadManager.php	15969 bytes	0644
DownloaderInterface.php	3970 bytes	0644
DvcsDownloaderInterface.php	782 bytes	0644
FileDownloader.php	19575 bytes	0644
FilesystemException.php	803 bytes	0644
FossilDownloader.php	4280 bytes	0644
GitDownloader.php	25342 bytes	0644
GzipDownloader.php	2168 bytes	0644
HgDownloader.php	3463 bytes	0644
MaxFileSizeExceededException.php	367 bytes	0644
PathDownloader.php	12239 bytes	0644
PerforceDownloader.php	3375 bytes	0644
PharDownloader.php	1044 bytes	0644
RarDownloader.php	2472 bytes	0644
SvnDownloader.php	8834 bytes	0644
TarDownloader.php	804 bytes	0644
TransportException.php	1833 bytes	0644
VcsCapableDownloaderInterface.php	795 bytes	0644
VcsDownloader.php	12874 bytes	0644
XzDownloader.php	1026 bytes	0644
ZipDownloader.php	11273 bytes	0644
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File Content: DownloadManager.php

File Content: `DownloadManager.php`
