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1<?php
2
3namespace BrianHenryIE\Strauss\Pipeline\Autoload;
4
5use BrianHenryIE\Strauss\Composer\ComposerPackage;
6use BrianHenryIE\Strauss\Files\File;
7use BrianHenryIE\Strauss\Config\AutoloadConfigInterface;
8use BrianHenryIE\Strauss\Config\OptimizeAutoloaderConfigInterface;
9use BrianHenryIE\Strauss\Helpers\FileSystem;
10use BrianHenryIE\Strauss\Pipeline\FileEnumerator;
11use BrianHenryIE\Strauss\Pipeline\Prefixer;
12use BrianHenryIE\Strauss\Types\DiscoveredSymbols;
13use BrianHenryIE\Strauss\Types\NamespaceSymbol;
14use Composer\Autoload\AutoloadGenerator;
15use Composer\Config;
16use Composer\Factory;
17use Composer\IO\NullIO;
18use Composer\Json\JsonFile;
19use Composer\Repository\InstalledFilesystemRepository;
20use League\Flysystem\FilesystemException;
21use Psr\Log\LoggerAwareTrait;
22use Psr\Log\LoggerInterface;
23use Seld\JsonLint\ParsingException;
24
25/**
26 * @phpstan-import-type ComposerJsonArray from ComposerPackage
27 */
28class DumpAutoload
29{
30    use LoggerAwareTrait;
31
32    protected AutoloadConfigInterface $config;
33
34    protected FileSystem $filesystem;
35
36    protected Prefixer $projectReplace;
37
38    protected FileEnumerator $fileEnumerator;
39
40    public function __construct(
41        AutoloadConfigInterface $config,
42        Filesystem $filesystem,
43        LoggerInterface $logger,
44        Prefixer $projectReplace,
45        FileEnumerator $fileEnumerator
46    ) {
47        $this->config = $config;
48        $this->filesystem = $filesystem;
49        $this->setLogger($logger);
50        $this->projectReplace = $projectReplace;
51        $this->fileEnumerator = $fileEnumerator;
52    }
53
54    /**
55     * Create `autoload.php` and the `vendor-prefixed/composer` directory.
56     * @throws ParsingException
57     * @throws FilesystemException
58     */
59    public function generatedPrefixedAutoloader(): void
60    {
61        $this->generatedMainAutoloader();
62
63        $this->createInstalledVersionsFiles();
64
65        $this->prefixNewAutoloader();
66    }
67
68    /**
69     * Uses `vendor/composer/installed.json` to output autoload files to `vendor-prefixed/composer`.
70     *
71     * @throws ParsingException
72     * @throws FilesystemException
73     */
74    protected function generatedMainAutoloader(): void
75    {
76        /**
77         * Unfortunately, `::dump()` creates the target directories if they don't exist, even though it otherwise respects `::setDryRun()`.
78         *
79         * {@see https://github.com/composer/composer/pull/12396} might fix this.
80         */
81        if ($this->config->isDryRun()) {
82            return;
83        }
84
85        $relativeTargetDir = $this->filesystem->getRelativePath(
86            $this->config->getProjectDirectory(),
87            $this->config->getTargetDirectory()
88        );
89
90        $defaultVendorDirBefore = Config::$defaultConfig['vendor-dir'];
91        Config::$defaultConfig['vendor-dir'] = $relativeTargetDir;
92
93        $projectComposerJson = new JsonFile($this->config->getProjectDirectory() . Factory::getComposerFile());
94
95        /** @var ComposerJsonArray $projectComposerJsonArray */
96        $projectComposerJsonArray = $projectComposerJson->read();
97        if (isset($projectComposerJsonArray['config'], $projectComposerJsonArray['config']['vendor-dir'])) {
98            $projectComposerJsonArray['config']['vendor-dir'] = $relativeTargetDir;
99        }
100
101        /**
102         * Loop over all packages that should be included and ensure the root package requires them. Composer only
103         * includes packages in the autoloader that are required by a parent package (including root). Without this,
104         * packages that are selectively prefixed are not included in the autoloader.
105         *
106         * @see AutoloadGenerator::filterPackageMap()
107         */
108        foreach ($this->config->getPackagesToPrefix() as $name => $package) {
109            $projectComposerJsonArray['require'][$name] = '*';
110        }
111
112        // Include the project root autoload in the vendor-prefixed autoloader?
113        if (isset($projectComposerJsonArray['autoload']) && !$this->config->isIncludeRootAutoload()) {
114            $projectComposerJsonArray['autoload'] = [];
115        }
116
117        $composer = Factory::create(new NullIO(), $projectComposerJsonArray);
118        $installationManager = $composer->getInstallationManager();
119        $package = $composer->getPackage();
120
121        /**
122         * Cannot use `$composer->getConfig()`, need to create a new one so the `vendor-dir` is correct.
123         */
124        $config = new Config(false, $this->config->getProjectDirectory());
125
126        /** @var array{config?: array<string, mixed>} $projectComposerConfigMergeArray */
127        $projectComposerConfigMergeArray = ['config' => $projectComposerJsonArray['config'] ?? []];
128
129        $config->merge($projectComposerConfigMergeArray);
130
131        $generator = new ComposerAutoloadGenerator(
132            $this->config->getNamespacePrefix(),
133            $composer->getEventDispatcher()
134        );
135        $isOptimize = $this->isOptimizeAutoloaderEnabled();
136        $generator->setDryRun($this->config->isDryRun());
137        $generator->setClassMapAuthoritative($isOptimize);
138        $generator->setRunScripts(false);
139//        $generator->setApcu($apcu, $apcuPrefix);
140//        $generator->setPlatformRequirementFilter($this->getPlatformRequirementFilter($input));
141
142        $installedJsonFile = new JsonFile($this->config->getTargetDirectory() . 'composer/installed.json');
143        /** @var array{dev?:bool} $installedJson */
144        $installedJson = $installedJsonFile->read();
145        $localRepo = new InstalledFilesystemRepository($installedJsonFile);
146
147        /**
148         * If the target directory is different to the vendor directory, then we do not want to include dev
149         * dependencies, but if it is vendor, then unless composer install was run with --no-dev, we do want them.
150         */
151        if ($this->config->getVendorDirectory() !== $this->config->getTargetDirectory()) {
152            $isDevMode = false;
153        } else {
154            $isDevMode = (bool) ($installedJson['dev'] ?? false);
155        }
156        $generator->setDevMode($isDevMode);
157
158        $strictAmbiguous = false; // $input->getOption('strict-ambiguous')
159
160        // This will output the autoload_static.php etc. files to `vendor-prefixed/composer`.
161        $generator->dump(
162            $config,
163            $localRepo,
164            $package,
165            $installationManager,
166            'composer',
167            $isOptimize,
168            $this->getSuffix(),
169            $composer->getLocker(),
170            $strictAmbiguous
171        );
172
173        /**
174         * Tests fail if this is absent.
175         *
176         * Arguably this should be in ::setUp() and tearDown() in the test classes, but if other tools run after Strauss
177         * then they might expect it to be unmodified.
178         */
179        Config::$defaultConfig['vendor-dir'] = $defaultVendorDirBefore;
180    }
181
182    /**
183     * Keep backward compatibility with configs implementing only AutoloadConfigInterface.
184     */
185    protected function isOptimizeAutoloaderEnabled(): bool
186    {
187        return $this->config instanceof OptimizeAutoloaderConfigInterface
188            ? $this->config->isOptimizeAutoloader()
189            : true;
190    }
191
192    /**
193     * Create `InstalledVersions.php` and `installed.php`.
194     *
195     * This file is copied in all Composer installations.
196     * It is added always in `ComposerAutoloadGenerator::dump()`, called above.
197     * If the file does not exist, its entry in the classmap will not be prefixed and will cause autoloading issues for the real class.
198     *
199     * The accompanying `installed.php` is unique per install. Copy it and filter its packages to the packages that was copied.
200     * @throws FilesystemException
201     */
202    protected function createInstalledVersionsFiles(): void
203    {
204        if ($this->config->getVendorDirectory() === $this->config->getTargetDirectory()) {
205            return;
206        }
207
208        $this->filesystem->copy($this->config->getVendorDirectory() . '/composer/InstalledVersions.php', $this->config->getTargetDirectory() . 'composer/InstalledVersions.php');
209
210        // This is just `<?php return array(...);`
211        $installedPhpString = $this->filesystem->read($this->config->getVendorDirectory() . '/composer/installed.php');
212        $installed = eval(str_replace('<?php', '', $installedPhpString));
213
214        $targetPackages = $this->config->getPackagesToCopy();
215        $targetPackagesNames = array_keys($targetPackages);
216
217        $installed['versions'] = array_filter($installed['versions'], function ($packageName) use ($targetPackagesNames) {
218            return in_array($packageName, $targetPackagesNames);
219        }, ARRAY_FILTER_USE_KEY);
220
221        $installedArrayString = var_export($installed, true);
222
223        $newInstalledPhpString = "<?php return $installedArrayString;";
224
225        // Update `__DIR__` which was evaluated during the `include`/`eval`.
226        $newInstalledPhpString = preg_replace('/(\'install_path\' => )(.*)(\/\.\..*)/', "$1__DIR__ . '$3", $newInstalledPhpString);
227
228        $this->filesystem->write($this->config->getTargetDirectory() . '/composer/installed.php', $newInstalledPhpString);
229    }
230
231    /**
232     * @throws FilesystemException
233     */
234    protected function prefixNewAutoloader(): void
235    {
236        if ($this->config->getVendorDirectory() === $this->config->getTargetDirectory()) {
237            return;
238        }
239
240        $this->logger->debug('Prefixing the new Composer autoloader.');
241
242        $projectFiles = $this->fileEnumerator->compileFileListForPaths([
243            $this->config->getTargetDirectory() . 'composer',
244        ]);
245
246        $phpFiles = array_filter(
247            $projectFiles->getFiles(),
248            fn($file) => $file->isPhpFile()
249        );
250
251        $phpFilesAbsolutePaths = array_map(
252            fn($file) => $file->getSourcePath(),
253            $phpFiles
254        );
255
256        $sourceFile = new File(__DIR__, __DIR__);
257        $composerAutoloadNamespaceSymbol = new NamespaceSymbol(
258            'Composer\\Autoload',
259            $sourceFile
260        );
261        $composerAutoloadNamespaceSymbol->setReplacement(
262            $this->config->getNamespacePrefix() . '\\Composer\\Autoload'
263        );
264        $composerNamespaceSymbol = new NamespaceSymbol(
265            'Composer',
266            $sourceFile
267        );
268        $composerNamespaceSymbol->setReplacement(
269            $this->config->getNamespacePrefix() . '\\Composer'
270        );
271
272        $discoveredSymbols = new DiscoveredSymbols();
273        $discoveredSymbols->add(
274            $composerNamespaceSymbol
275        );
276        $discoveredSymbols->add(
277            $composerAutoloadNamespaceSymbol
278        );
279
280        $this->projectReplace->replaceInProjectFiles($discoveredSymbols, $phpFilesAbsolutePaths);
281    }
282
283    /**
284     * If there is an existing autoloader, it will use the same suffix. If there is not, it pulls the suffix from
285     * {Composer::getLocker()} and clashes with the existing autoloader.
286     *
287     * @see https://github.com/composer/composer/blob/ae208dc1e182bd45d99fcecb956501da212454a1/src/Composer/Autoload/AutoloadGenerator.php#L429
288     * @see AutoloadGenerator::dump() 412:431
289     * @throws \Random\RandomException in PHP 8.2+
290     * @throws FilesystemException
291     */
292    protected function getSuffix(): ?string
293    {
294        return !$this->filesystem->fileExists($this->config->getTargetDirectory() . 'autoload.php')
295            ? bin2hex(random_bytes(16))
296            : null;
297    }
298}