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