Chris@18: <?php
Chris@18: 
Chris@18: /**
Chris@18:  * @file
Chris@18:  * Contains \DrupalFinder\DrupalFinder.
Chris@18:  */
Chris@18: 
Chris@18: namespace DrupalFinder;
Chris@18: 
Chris@18: class DrupalFinder
Chris@18: {
Chris@18:     /**
Chris@18:      * Drupal web public directory.
Chris@18:      *
Chris@18:      * @var string
Chris@18:      */
Chris@18:     private $drupalRoot;
Chris@18: 
Chris@18:     /**
Chris@18:      * Drupal package composer directory.
Chris@18:      *
Chris@18:      * @var bool
Chris@18:      */
Chris@18:     private $composerRoot;
Chris@18: 
Chris@18:     /**
Chris@18:      * Composer vendor directory.
Chris@18:      *
Chris@18:      * @var string
Chris@18:      *
Chris@18:      * @see https://getcomposer.org/doc/06-config.md#vendor-dir
Chris@18:      */
Chris@18:     private $vendorDir;
Chris@18: 
Chris@18:     public function locateRoot($start_path)
Chris@18:     {
Chris@18:         $this->drupalRoot = false;
Chris@18:         $this->composerRoot = false;
Chris@18:         $this->vendorDir = false;
Chris@18: 
Chris@18:         foreach (array(true, false) as $follow_symlinks) {
Chris@18:             $path = $start_path;
Chris@18:             if ($follow_symlinks && is_link($path)) {
Chris@18:                 $path = realpath($path);
Chris@18:             }
Chris@18:             // Check the start path.
Chris@18:             if ($this->isValidRoot($path)) {
Chris@18:                 return true;
Chris@18:             } else {
Chris@18:                 // Move up dir by dir and check each.
Chris@18:                 while ($path = $this->shiftPathUp($path)) {
Chris@18:                     if ($follow_symlinks && is_link($path)) {
Chris@18:                         $path = realpath($path);
Chris@18:                     }
Chris@18:                     if ($this->isValidRoot($path)) {
Chris@18:                         return true;
Chris@18:                     }
Chris@18:                 }
Chris@18:             }
Chris@18:         }
Chris@18: 
Chris@18:         return false;
Chris@18:     }
Chris@18: 
Chris@18:     /**
Chris@18:      * Returns parent directory.
Chris@18:      *
Chris@18:      * @param string
Chris@18:      *   Path to start from
Chris@18:      *
Chris@18:      * @return string|false
Chris@18:      *   Parent path of given path or false when $path is filesystem root
Chris@18:      */
Chris@18:     private function shiftPathUp($path)
Chris@18:     {
Chris@18:         $parent = dirname($path);
Chris@18: 
Chris@18:         return in_array($parent, ['.', $path]) ? false : $parent;
Chris@18:     }
Chris@18: 
Chris@18:     /**
Chris@18:      * @param $path
Chris@18:      *
Chris@18:      * @return bool
Chris@18:      */
Chris@18:     protected function isValidRoot($path)
Chris@18:     {
Chris@18:         if (!empty($path) && is_dir($path) && file_exists($path . '/autoload.php') && file_exists($path . '/' . $this->getComposerFileName())) {
Chris@18:             // Additional check for the presence of core/composer.json to
Chris@18:             // grant it is not a Drupal 7 site with a base folder named "core".
Chris@18:             $candidate = 'core/includes/common.inc';
Chris@18:             if (file_exists($path . '/' . $candidate) && file_exists($path . '/core/core.services.yml')) {
Chris@18:                 if (file_exists($path . '/core/misc/drupal.js') || file_exists($path . '/core/assets/js/drupal.js')) {
Chris@18:                     $this->composerRoot = $path;
Chris@18:                     $this->drupalRoot = $path;
Chris@18:                     $this->vendorDir = $this->composerRoot . '/vendor';
Chris@18:                 }
Chris@18:             }
Chris@18:         }
Chris@18:         if (!empty($path) && is_dir($path) && file_exists($path . '/' . $this->getComposerFileName())) {
Chris@18:             $json = json_decode(
Chris@18:                 file_get_contents($path . '/' . $this->getComposerFileName()),
Chris@18:                 true
Chris@18:             );
Chris@18:             if (is_array($json)) {
Chris@18:                 if (isset($json['extra']['installer-paths']) && is_array($json['extra']['installer-paths'])) {
Chris@18:                     foreach ($json['extra']['installer-paths'] as $install_path => $items) {
Chris@18:                         if (in_array('type:drupal-core', $items) ||
Chris@18:                             in_array('drupal/core', $items) ||
Chris@18:                             in_array('drupal/drupal', $items)) {
Chris@18:                             $this->composerRoot = $path;
Chris@18:                             // @todo: Remove this magic and detect the major version instead.
Chris@18:                             if ($install_path == 'core') {
Chris@18:                                 $install_path = null;
Chris@18:                             } elseif (substr($install_path, -5) == '/core') {
Chris@18:                                 $install_path = substr($install_path, 0, -5);
Chris@18:                             }
Chris@18:                             $this->drupalRoot = rtrim($path . '/' . $install_path, '/');
Chris@18:                             $this->vendorDir = $this->composerRoot . '/vendor';
Chris@18:                         }
Chris@18:                     }
Chris@18:                 }
Chris@18:             }
Chris@18:         }
Chris@18:         if ($this->composerRoot && file_exists($this->composerRoot . '/' . $this->getComposerFileName())) {
Chris@18:             $json = json_decode(
Chris@18:                 file_get_contents($path . '/' . $this->getComposerFileName()),
Chris@18:                 true
Chris@18:             );
Chris@18:             if (is_array($json) && isset($json['config']['vendor-dir'])) {
Chris@18:                 $this->vendorDir = $this->composerRoot . '/' . $json['config']['vendor-dir'];
Chris@18:             }
Chris@18:         }
Chris@18: 
Chris@18:         return $this->drupalRoot && $this->composerRoot && $this->vendorDir;
Chris@18:     }
Chris@18: 
Chris@18:     /**
Chris@18:      * @return string
Chris@18:      */
Chris@18:     public function getDrupalRoot()
Chris@18:     {
Chris@18:         return $this->drupalRoot;
Chris@18:     }
Chris@18: 
Chris@18:     /**
Chris@18:      * @return string
Chris@18:      */
Chris@18:     public function getComposerRoot()
Chris@18:     {
Chris@18:         return $this->composerRoot;
Chris@18:     }
Chris@18: 
Chris@18:     /**
Chris@18:      * @return string
Chris@18:      */
Chris@18:     protected function getComposerFileName()
Chris@18:     {
Chris@18:         return trim(getenv('COMPOSER')) ?: 'composer.json';
Chris@18:     }
Chris@18: 
Chris@18:     /**
Chris@18:      * @return string
Chris@18:      */
Chris@18:     public function getVendorDir()
Chris@18:     {
Chris@18:         return $this->vendorDir;
Chris@18:     }
Chris@18: }