Passed
Pull Request — master (#48)
by Marco
02:39
created

LocateDependenciesViaComposer::__invoke()   B

Complexity

Conditions 1
Paths 1

Size

Total Lines 27
Code Lines 17

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
dl 0
loc 27
rs 8.8571
c 0
b 0
f 0
cc 1
eloc 17
nc 1
nop 1
1
<?php
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declare(strict_types=1);
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namespace Roave\ApiCompare\LocateDependencies;
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use Assert\Assert;
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use Composer\Installer;
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use Roave\ApiCompare\SourceLocator\StaticClassMapSourceLocator;
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use Roave\BetterReflection\Reflection\ReflectionClass;
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use Roave\BetterReflection\Reflection\ReflectionProperty;
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use Roave\BetterReflection\Reflector\ClassReflector;
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use Roave\BetterReflection\SourceLocator\Ast\Locator;
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use Roave\BetterReflection\SourceLocator\Type\AggregateSourceLocator;
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use Roave\BetterReflection\SourceLocator\Type\PhpInternalSourceLocator;
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use Roave\BetterReflection\SourceLocator\Type\SingleFileSourceLocator;
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use Roave\BetterReflection\SourceLocator\Type\SourceLocator;
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final class LocateDependenciesViaComposer implements LocateDependencies
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{
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    /** @var Installer */
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    private $installer;
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    /** @var Locator */
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    private $astLocator;
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    public function __construct(Installer $installer, Locator $astLocator)
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    {
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        $this->installer  = $installer;
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        $this->astLocator = $astLocator;
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        // Some defaults needed for this specific implementation:
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        $this->installer->setDevMode(false);
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        $this->installer->setDumpAutoloader(true);
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        $this->installer->setRunScripts(false);
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        $this->installer->setOptimizeAutoloader(true);
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        $this->installer->setClassMapAuthoritative(true);
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        $this->installer->setIgnorePlatformRequirements(true);
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    }
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    public function __invoke(string $installationPath) : SourceLocator
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    {
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        Assert::that($installationPath)->directory();
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        Assert::that($installationPath . '/composer.json')->file();
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        $this->runInDirectory(function () {
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            $this->installer->run();
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        }, $installationPath);
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        $autoloadStatic = $installationPath . '/vendor/composer/autoload_static.php';
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        Assert::that($autoloadStatic)->file();
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        $autoloadMappingClasses = (new ClassReflector(new SingleFileSourceLocator(
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            $autoloadStatic,
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            $this->astLocator
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        )))->getAllClasses();
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        Assert::that($autoloadMappingClasses)->count(1);
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        /** @var ReflectionClass $generatedAutoloadClass */
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        $generatedAutoloadClass = reset($autoloadMappingClasses);
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        return new AggregateSourceLocator([
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            $this->sourceLocatorFromAutoloadStatic($generatedAutoloadClass),
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            $this->sourceLocatorFromAutoloadFiles($generatedAutoloadClass),
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            new PhpInternalSourceLocator($this->astLocator),
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        ]);
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    }
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    private function sourceLocatorFromAutoloadStatic(ReflectionClass $autoloadStatic) : SourceLocator
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    {
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        $classMapProperty = $autoloadStatic->getProperty('classMap');
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        Assert::that($classMapProperty)->notNull();
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        assert($classMapProperty instanceof ReflectionProperty);
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        $classMap = $classMapProperty->getDefaultValue();
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        Assert::that($classMap)
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              ->isArray()
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              ->all()
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              ->file();
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        return new StaticClassMapSourceLocator($classMap, $this->astLocator);
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    }
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    private function sourceLocatorFromAutoloadFiles(ReflectionClass $autoloadStatic) : SourceLocator
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    {
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        $filesMapProperty = $autoloadStatic->getProperty('files');
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        Assert::that($filesMapProperty)->notNull();
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        assert($filesMapProperty instanceof ReflectionProperty);
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        $filesMap = $filesMapProperty->getDefaultValue();
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        Assert::that($filesMap)
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              ->isArray()
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              ->all()
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              ->file();
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        return new AggregateSourceLocator(array_values(array_map(
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            function (string $path) : SourceLocator {
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                return new SingleFileSourceLocator(
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                    realpath($path),
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                    $this->astLocator
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                );
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            },
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            $filesMap
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        )));
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    }
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    private function runInDirectory(callable $callable, string $directoryOfExecution) : void
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    {
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        $originalDirectory = getcwd();
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        try {
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            chdir($directoryOfExecution);
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            $callable();
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        } finally {
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            chdir($originalDirectory);
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        }
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    }
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}
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