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<?php
namespace Http\Discovery\Composer;
use Composer\Composer;
use Composer\DependencyResolver\Pool;
use Composer\EventDispatcher\EventSubscriberInterface;
use Composer\Factory;
use Composer\Installer;
use Composer\IO\IOInterface;
use Composer\Json\JsonFile;
use Composer\Json\JsonManipulator;
use Composer\Package\Locker;
use Composer\Package\Version\VersionParser;
use Composer\Package\Version\VersionSelector;
use Composer\Plugin\PluginInterface;
use Composer\Repository\InstalledRepositoryInterface;
use Composer\Repository\RepositorySet;
use Composer\Script\Event;
use Composer\Script\ScriptEvents;
use Composer\Util\Filesystem;
use Http\Discovery\ClassDiscovery;
/**
* Auto-installs missing implementations.
*
* When a dependency requires both this package and one of the supported `*-implementation`
* virtual packages, this plugin will auto-install a well-known implementation if none is
* found. The plugin will first look at already installed packages and figure out the
* preferred implementation to install based on the below stickyness rules (or on the first
* listed implementation if no rules match.)
*
* Don't miss updating src/Strategy/Common*Strategy.php when adding a new supported package.
*
* @author Nicolas Grekas <p@tchwork.com>
*
* @internal
*/
class Plugin implements PluginInterface, EventSubscriberInterface
{
/**
* Describes, for every supported virtual implementation, which packages
* provide said implementation and which extra dependencies each package
* requires to provide the implementation.
*/
private const PROVIDE_RULES = [
'php-http/async-client-implementation' => [
'symfony/http-client:>=6.3' => ['guzzlehttp/promises', 'psr/http-factory-implementation'],
'symfony/http-client' => ['guzzlehttp/promises', 'php-http/message-factory', 'psr/http-factory-implementation'],
'php-http/guzzle7-adapter' => [],
'php-http/guzzle6-adapter' => [],
'php-http/curl-client' => [],
'php-http/react-adapter' => [],
],
'php-http/client-implementation' => [
'symfony/http-client:>=6.3' => ['psr/http-factory-implementation'],
'symfony/http-client' => ['php-http/message-factory', 'psr/http-factory-implementation'],
'php-http/guzzle7-adapter' => [],
'php-http/guzzle6-adapter' => [],
'php-http/cakephp-adapter' => [],
'php-http/curl-client' => [],
'php-http/react-adapter' => [],
'php-http/buzz-adapter' => [],
'php-http/artax-adapter' => [],
'kriswallsmith/buzz:^1' => [],
],
'psr/http-client-implementation' => [
'symfony/http-client' => ['psr/http-factory-implementation'],
'guzzlehttp/guzzle' => [],
'kriswallsmith/buzz:^1' => [],
],
'psr/http-message-implementation' => [
'php-http/discovery' => ['psr/http-factory-implementation'],
],
'psr/http-factory-implementation' => [
'nyholm/psr7' => [],
'guzzlehttp/psr7:>=2' => [],
'slim/psr7' => [],
'laminas/laminas-diactoros' => [],
'phalcon/cphalcon:^4' => [],
'http-interop/http-factory-guzzle' => [],
'http-interop/http-factory-diactoros' => [],
'http-interop/http-factory-slim' => [],
],
];
/**
* Describes which package should be preferred on the left side
* depending on which one is already installed on the right side.
*/
private const STICKYNESS_RULES = [
'symfony/http-client' => 'symfony/framework-bundle',
'php-http/guzzle7-adapter' => 'guzzlehttp/guzzle:^7',
'php-http/guzzle6-adapter' => 'guzzlehttp/guzzle:^6',
'php-http/guzzle5-adapter' => 'guzzlehttp/guzzle:^5',
'php-http/cakephp-adapter' => 'cakephp/cakephp',
'php-http/react-adapter' => 'react/event-loop',
'php-http/buzz-adapter' => 'kriswallsmith/buzz:^0.15.1',
'php-http/artax-adapter' => 'amphp/artax:^3',
'http-interop/http-factory-guzzle' => 'guzzlehttp/psr7:^1',
'http-interop/http-factory-slim' => 'slim/slim:^3',
];
private const INTERFACE_MAP = [
'php-http/async-client-implementation' => [
'Http\Client\HttpAsyncClient',
],
'php-http/client-implementation' => [
'Http\Client\HttpClient',
],
'psr/http-client-implementation' => [
'Psr\Http\Client\ClientInterface',
],
'psr/http-factory-implementation' => [
'Psr\Http\Message\RequestFactoryInterface',
'Psr\Http\Message\ResponseFactoryInterface',
'Psr\Http\Message\ServerRequestFactoryInterface',
'Psr\Http\Message\StreamFactoryInterface',
'Psr\Http\Message\UploadedFileFactoryInterface',
'Psr\Http\Message\UriFactoryInterface',
],
];
public static function getSubscribedEvents(): array
{
return [
ScriptEvents::PRE_AUTOLOAD_DUMP => 'preAutoloadDump',
ScriptEvents::POST_UPDATE_CMD => 'postUpdate',
];
}
public function activate(Composer $composer, IOInterface $io): void
{
}
public function deactivate(Composer $composer, IOInterface $io)
{
}
public function uninstall(Composer $composer, IOInterface $io)
{
}
public function postUpdate(Event $event)
{
$composer = $event->getComposer();
$repo = $composer->getRepositoryManager()->getLocalRepository();
$requires = [
$composer->getPackage()->getRequires(),
$composer->getPackage()->getDevRequires(),
];
$pinnedAbstractions = [];
$pinned = $composer->getPackage()->getExtra()['discovery'] ?? [];
foreach (self::INTERFACE_MAP as $abstraction => $interfaces) {
foreach (isset($pinned[$abstraction]) ? [] : $interfaces as $interface) {
if (!isset($pinned[$interface])) {
continue 2;
}
}
$pinnedAbstractions[$abstraction] = true;
}
$missingRequires = $this->getMissingRequires($repo, $requires, 'project' === $composer->getPackage()->getType(), $pinnedAbstractions);
$missingRequires = [
'require' => array_fill_keys(array_merge([], ...array_values($missingRequires[0])), '*'),
'require-dev' => array_fill_keys(array_merge([], ...array_values($missingRequires[1])), '*'),
'remove' => array_fill_keys(array_merge([], ...array_values($missingRequires[2])), '*'),
];
if (!$missingRequires = array_filter($missingRequires)) {
return;
}
$composerJsonContents = file_get_contents(Factory::getComposerFile());
$this->updateComposerJson($missingRequires, $composer->getConfig()->get('sort-packages'));
$installer = null;
// Find the composer installer, hack borrowed from symfony/flex
foreach (debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT) as $trace) {
if (isset($trace['object']) && $trace['object'] instanceof Installer) {
$installer = $trace['object'];
break;
}
}
if (!$installer) {
return;
}
$event->stopPropagation();
$dispatcher = $composer->getEventDispatcher();
$disableScripts = !method_exists($dispatcher, 'setRunScripts') || !((array) $dispatcher)["\0*\0runScripts"];
$composer = Factory::create($event->getIO(), null, false, $disableScripts);
/** @var Installer $installer */
$installer = clone $installer;
if (method_exists($installer, 'setAudit')) {
$trace['object']->setAudit(false);
}
// we need a clone of the installer to preserve its configuration state but with our own service objects
$installer->__construct(
$event->getIO(),
$composer->getConfig(),
$composer->getPackage(),
$composer->getDownloadManager(),
$composer->getRepositoryManager(),
$composer->getLocker(),
$composer->getInstallationManager(),
$composer->getEventDispatcher(),
$composer->getAutoloadGenerator()
);
if (method_exists($installer, 'setPlatformRequirementFilter')) {
$installer->setPlatformRequirementFilter(((array) $trace['object'])["\0*\0platformRequirementFilter"]);
}
if (0 !== $installer->run()) {
file_put_contents(Factory::getComposerFile(), $composerJsonContents);
return;
}
$versionSelector = new VersionSelector(ClassDiscovery::safeClassExists(RepositorySet::class) ? new RepositorySet() : new Pool());
$updateComposerJson = false;
foreach ($composer->getRepositoryManager()->getLocalRepository()->getPackages() as $package) {
foreach (['require', 'require-dev'] as $key) {
if (!isset($missingRequires[$key][$package->getName()])) {
continue;
}
$updateComposerJson = true;
$missingRequires[$key][$package->getName()] = $versionSelector->findRecommendedRequireVersion($package);
}
}
if ($updateComposerJson) {
$this->updateComposerJson($missingRequires, $composer->getConfig()->get('sort-packages'));
$this->updateComposerLock($composer, $event->getIO());
}
}
public function getMissingRequires(InstalledRepositoryInterface $repo, array $requires, bool $isProject, array $pinnedAbstractions): array
{
$allPackages = [];
$devPackages = method_exists($repo, 'getDevPackageNames') ? array_fill_keys($repo->getDevPackageNames(), true) : [];
// One must require "php-http/discovery"
// to opt-in for auto-installation of virtual package implementations
if (!isset($requires[0]['php-http/discovery'])) {
$requires = [[], []];
}
foreach ($repo->getPackages() as $package) {
$allPackages[$package->getName()] = true;
if (1 < \count($names = $package->getNames(false))) {
$allPackages += array_fill_keys($names, false);
if (isset($devPackages[$package->getName()])) {
$devPackages += $names;
}
}
if (isset($package->getRequires()['php-http/discovery'])) {
$requires[(int) isset($devPackages[$package->getName()])] += $package->getRequires();
}
}
$missingRequires = [[], [], []];
$versionParser = new VersionParser();
if (ClassDiscovery::safeClassExists(\Phalcon\Http\Message\RequestFactory::class, false)) {
$missingRequires[0]['psr/http-factory-implementation'] = [];
$missingRequires[1]['psr/http-factory-implementation'] = [];
}
foreach ($requires as $dev => $rules) {
$abstractions = [];
$rules = array_intersect_key(self::PROVIDE_RULES, $rules);
while ($rules) {
$abstraction = key($rules);
if (isset($pinnedAbstractions[$abstraction])) {
unset($rules[$abstraction]);
continue;
}
$abstractions[] = $abstraction;
foreach (array_shift($rules) as $candidate => $deps) {
[$candidate, $version] = explode(':', $candidate, 2) + [1 => null];
if (!isset($allPackages[$candidate])) {
continue;
}
if (null !== $version && !$repo->findPackage($candidate, $versionParser->parseConstraints($version))) {
continue;
}
if ($isProject && !$dev && isset($devPackages[$candidate])) {
$missingRequires[0][$abstraction] = [$candidate];
$missingRequires[2][$abstraction] = [$candidate];
} else {
$missingRequires[$dev][$abstraction] = [];
}
foreach ($deps as $dep) {
if (isset(self::PROVIDE_RULES[$dep])) {
$rules[$dep] = self::PROVIDE_RULES[$dep];
} elseif (!isset($allPackages[$dep])) {
$missingRequires[$dev][$abstraction][] = $dep;
} elseif ($isProject && !$dev && isset($devPackages[$dep])) {
$missingRequires[0][$abstraction][] = $dep;
$missingRequires[2][$abstraction][] = $dep;
}
}
break;
}
}
while ($abstractions) {
$abstraction = array_shift($abstractions);
if (isset($missingRequires[$dev][$abstraction])) {
continue;
}
$candidates = self::PROVIDE_RULES[$abstraction];
foreach ($candidates as $candidate => $deps) {
[$candidate, $version] = explode(':', $candidate, 2) + [1 => null];
if (null !== $version && !$repo->findPackage($candidate, $versionParser->parseConstraints($version))) {
continue;
}
if (isset($allPackages[$candidate]) && (!$isProject || $dev || !isset($devPackages[$candidate]))) {
continue 2;
}
}
foreach (array_intersect_key(self::STICKYNESS_RULES, $candidates) as $candidate => $stickyRule) {
[$stickyName, $stickyVersion] = explode(':', $stickyRule, 2) + [1 => null];
if (!isset($allPackages[$stickyName]) || ($isProject && !$dev && isset($devPackages[$stickyName]))) {
continue;
}
if (null !== $stickyVersion && !$repo->findPackage($stickyName, $versionParser->parseConstraints($stickyVersion))) {
continue;
}
$candidates = [$candidate => $candidates[$candidate]];
break;
}
$dep = key($candidates);
[$dep] = explode(':', $dep, 2);
$missingRequires[$dev][$abstraction] = [$dep];
if ($isProject && !$dev && isset($devPackages[$dep])) {
$missingRequires[2][$abstraction][] = $dep;
}
}
}
$missingRequires[1] = array_diff_key($missingRequires[1], $missingRequires[0]);
return $missingRequires;
}
public function preAutoloadDump(Event $event)
{
$filesystem = new Filesystem();
// Double realpath() on purpose, see https://bugs.php.net/72738
$vendorDir = $filesystem->normalizePath(realpath(realpath($event->getComposer()->getConfig()->get('vendor-dir'))));
$filesystem->ensureDirectoryExists($vendorDir.'/composer');
$pinned = $event->getComposer()->getPackage()->getExtra()['discovery'] ?? [];
$candidates = [];
$allInterfaces = array_merge(...array_values(self::INTERFACE_MAP));
foreach ($pinned as $abstraction => $class) {
if (isset(self::INTERFACE_MAP[$abstraction])) {
$interfaces = self::INTERFACE_MAP[$abstraction];
} elseif (false !== $k = array_search($abstraction, $allInterfaces, true)) {
$interfaces = [$allInterfaces[$k]];
} else {
throw new \UnexpectedValueException(sprintf('Invalid "extra.discovery" pinned in composer.json: "%s" is not one of ["%s"].', $abstraction, implode('", "', array_keys(self::INTERFACE_MAP))));
}
foreach ($interfaces as $interface) {
$candidates[] = sprintf("case %s: return [['class' => %s]];\n", var_export($interface, true), var_export($class, true));
}
}
$file = $vendorDir.'/composer/GeneratedDiscoveryStrategy.php';
if (!$candidates) {
if (file_exists($file)) {
unlink($file);
}
return;
}
$candidates = implode(' ', $candidates);
$code = <<<EOPHP
<?php
namespace Http\Discovery\Strategy;
class GeneratedDiscoveryStrategy implements DiscoveryStrategy
{
public static function getCandidates(\$type)
{
switch (\$type) {
$candidates
default: return [];
}
}
}
EOPHP
;
if (!file_exists($file) || $code !== file_get_contents($file)) {
file_put_contents($file, $code);
}
$rootPackage = $event->getComposer()->getPackage();
$autoload = $rootPackage->getAutoload();
$autoload['classmap'][] = $vendorDir.'/composer/GeneratedDiscoveryStrategy.php';
$rootPackage->setAutoload($autoload);
}
private function updateComposerJson(array $missingRequires, bool $sortPackages)
{
$file = Factory::getComposerFile();
$contents = file_get_contents($file);
$manipulator = new JsonManipulator($contents);
foreach ($missingRequires as $key => $packages) {
foreach ($packages as $package => $constraint) {
if ('remove' === $key) {
$manipulator->removeSubNode('require-dev', $package);
} else {
$manipulator->addLink($key, $package, $constraint, $sortPackages);
}
}
}
file_put_contents($file, $manipulator->getContents());
}
private function updateComposerLock(Composer $composer, IOInterface $io)
{
$lock = substr(Factory::getComposerFile(), 0, -4).'lock';
$composerJson = file_get_contents(Factory::getComposerFile());
$lockFile = new JsonFile($lock, null, $io);
$locker = ClassDiscovery::safeClassExists(RepositorySet::class)
? new Locker($io, $lockFile, $composer->getInstallationManager(), $composerJson)
: new Locker($io, $lockFile, $composer->getRepositoryManager(), $composer->getInstallationManager(), $composerJson);
$lockData = $locker->getLockData();
$lockData['content-hash'] = Locker::getContentHash($composerJson);
$lockFile->write($lockData);
}
}
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