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<?php |
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declare(strict_types=1); |
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namespace drupol\ComposerPackages\Commands; |
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use Composer\Command\BaseCommand as Command; |
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use ComposerPackages\Dependencies; |
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use ComposerPackages\Packages; |
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use PBergman\Console\Helper\TreeHelper; |
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use Symfony\Component\Console\Input\InputInterface; |
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use Symfony\Component\Console\Output\OutputInterface; |
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use Symfony\Component\Console\Question\Question; |
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class ReverseDependencies extends Command |
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{ |
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protected $color; |
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protected function configure() |
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{ |
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$this->setName('reverse-dependencies'); |
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$this->setDescription('Retrace the tree of dependencies originally asking for a package.'); |
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} |
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protected function execute(InputInterface $input, OutputInterface $output) |
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{ |
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$helper = $this->getHelper('question'); |
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$tree = new TreeHelper(); |
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$packages = array_keys(iterator_to_array(Packages::packages())); |
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$question = new Question('<question>Please type the package name:</question>' . \PHP_EOL); |
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if (method_exists($question, 'setAutocompleterCallback')) { |
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$callback = static function (string $userInput) use ($packages): array { |
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return array_filter($packages, static function (string $packageName) use ($userInput) { |
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return false !== mb_stripos($packageName, $userInput); |
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}); |
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}; |
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$question->setAutocompleterCallback($callback); |
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} else { |
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$question->setAutocompleterValues($packages); |
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} |
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$search = $helper->ask($input, $output, $question) ?? ''; |
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$packages = Packages::packages(); |
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$parents = $this->lookForTree($packages, $search); |
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foreach ($parents as $children) { |
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$shouldBeDeleted = array_filter($parents, static function ($value) use ($children) { |
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return \in_array($children, $value, true); |
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}); |
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if (!$shouldBeDeleted && \is_array($children) && !empty($children)) { |
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$tree->addArray($children); |
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} |
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} |
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$tree->printTree($output); |
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} |
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private function countLevels($filtered): int |
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{ |
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return \count($filtered, \COUNT_RECURSIVE); |
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} |
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private function lookForChildren($packageName, $search): array |
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{ |
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$dependencies = Dependencies::get($packageName); |
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foreach ($dependencies as $dependencyName) { |
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if ($dependencyName === $search) { |
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return [$packageName => [$dependencyName]]; |
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} |
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$deeperLook = $this->lookForChildren($dependencyName, $search); |
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if (!empty($deeperLook)) { |
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return [$packageName => $deeperLook]; |
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} |
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} |
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return []; |
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} |
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private function lookForTree($packages, $search): array |
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{ |
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$children = []; |
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foreach ($packages as $package) { |
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$children[] = $this->lookForChildren($package['name'], $search); |
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} |
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$filtered = array_filter($children); |
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$sortCriteria = array_map([$this, 'countLevels'], $filtered); |
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array_multisort($sortCriteria, \SORT_ASC, $filtered); |
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return $filtered; |
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} |
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} |
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Let?s assume that you have a directory layout like this:
and let?s assume the following content of
Bar.php
:If both files
OtherDir/Foo.php
andSomeDir/Foo.php
are loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php
However, as
OtherDir/Foo.php
does not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php
, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: