checkDependencies.php

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<?php
require_once __DIR__ . '/Maintenance.php';
 
class CheckDependencies extends Maintenance {
 
    private $checkDev;
 
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Check dependencies for extensions' );
        $this->addOption( 'extensions', 'Comma separated list of extensions to check', false, true );
        $this->addOption( 'skins', 'Comma separated list of skins to check', false, true );
        $this->addOption( 'json', 'Output in JSON' );
        $this->addOption( 'dev', 'Check development dependencies too' );
    }
 
    public function execute() {
        $this->checkDev = $this->hasOption( 'dev' );
        $extensions = $this->hasOption( 'extensions' )
            ? explode( ',', $this->getOption( 'extensions' ) )
            : [];
        $skins = $this->hasOption( 'skins' )
            ? explode( ',', $this->getOption( 'skins' ) )
            : [];
 
        $dependencies = [];
        // Note that we can only use the main registry if we are
        // not checking development dependencies.
        $registry = ExtensionRegistry::getInstance();
        foreach ( $extensions as $extension ) {
            if ( !$this->checkDev && $registry->isLoaded( $extension ) ) {
                // If it's already loaded, we know all the dependencies resolved.
                $this->addToDependencies( $dependencies, [ $extension ], [] );
                continue;
            }
            $this->loadThing( $dependencies, $extension, [ $extension ], [] );
        }
 
        foreach ( $skins as $skin ) {
            if ( !$this->checkDev && $registry->isLoaded( $skin ) ) {
                // If it's already loaded, we know all the dependencies resolved.
                $this->addToDependencies( $dependencies, [], [ $skin ] );
                continue;
            }
            $this->loadThing( $dependencies, $skin, [], [ $skin ] );
        }
 
        if ( $this->hasOption( 'json' ) ) {
            $this->output( json_encode( $dependencies ) . "\n" );
        } else {
            $this->output( $this->formatForHumans( $dependencies ) . "\n" );
        }
    }
 
    private function loadThing( &$dependencies, $name, $extensions, $skins ) {
        $extDir = $this->getConfig()->get( 'ExtensionDirectory' );
        $styleDir = $this->getConfig()->get( 'StyleDirectory' );
        $queue = [];
        $missing = false;
        foreach ( $extensions as $extension ) {
            $path = "$extDir/$extension/extension.json";
            if ( file_exists( $path ) ) {
                // 1 is ignored
                $queue[$path] = 1;
                $this->addToDependencies( $dependencies, [ $extension ], [], $name );
            } else {
                $missing = true;
                $this->addToDependencies( $dependencies, [ $extension ], [], $name, 'missing' );
            }
        }
 
        foreach ( $skins as $skin ) {
            $path = "$styleDir/$skin/skin.json";
            if ( file_exists( $path ) ) {
                $queue[$path] = 1;
                $this->addToDependencies( $dependencies, [], [ $skin ], $name );
            } else {
                $missing = true;
                $this->addToDependencies( $dependencies, [], [ $skin ], $name, 'missing' );
            }
        }
 
        if ( $missing ) {
            // Stuff is missing, give up
            return;
        }
 
        $registry = new ExtensionRegistry();
        $registry->setCheckDevRequires( $this->checkDev );
        try {
            $registry->readFromQueue( $queue );
        } catch ( ExtensionDependencyError $e ) {
            $reason = false;
            if ( $e->incompatibleCore ) {
                $reason = 'incompatible-core';
            } elseif ( $e->incompatibleSkins ) {
                $reason = 'incompatible-skins';
            } elseif ( $e->incompatibleExtensions ) {
                $reason = 'incompatible-extensions';
            } elseif ( $e->missingExtensions || $e->missingSkins ) {
                // There's an extension missing in the dependency tree,
                // so add those to the dependency list and try again
                return $this->loadThing(
                    $dependencies,
                    $name,
                    array_merge( $extensions, $e->missingExtensions ),
                    array_merge( $skins, $e->missingSkins )
                );
            } else {
                // missing-phpExtension
                // missing-ability
                // XXX: ???
                throw $e;
            }
 
            $this->addToDependencies( $dependencies, $extensions, $skins, $name, $reason, $e->getMessage() );
        }
 
        $this->addToDependencies( $dependencies, $extensions, $skins, $name );
    }
 
    private function addToDependencies( &$dependencies, $extensions, $skins,
        $why = null, $status = null, $message = null
    ) {
        $mainRegistry = ExtensionRegistry::getInstance();
        $iter = [ 'extensions' => $extensions, 'skins' => $skins ];
        foreach ( $iter as $type => $things ) {
            foreach ( $things as $thing ) {
                $preStatus = $dependencies[$type][$thing]['status'] ?? false;
                if ( $preStatus !== 'loaded' ) {
                    // OK to overwrite
                    if ( $status ) {
                        $tStatus = $status;
                    } else {
                        $tStatus = $mainRegistry->isLoaded( $thing ) ? 'loaded' : 'present';
                    }
                    $dependencies[$type][$thing]['status'] = $tStatus;
                }
                if ( $why !== null ) {
                    $dependencies[$type][$thing]['why'][] = $why;
                    // XXX: this is a bit messy
                    $dependencies[$type][$thing]['why'] = array_unique(
                        $dependencies[$type][$thing]['why'] );
                }
 
                if ( $message !== null ) {
                    $dependencies[$type][$thing]['message'] = trim( $message );
                }
 
            }
        }
    }
 
    private function formatForHumans( $dependencies ) {
        $text = '';
        foreach ( $dependencies as $type => $things ) {
            $text .= ucfirst( $type ) . "\n" . str_repeat( '=', strlen( $type ) ) . "\n";
            foreach ( $things as $thing => $info ) {
                $why = $info['why'] ?? [];
                if ( $why ) {
                    $whyText = '(because: ' . implode( ',', $why ) . ') ';
                } else {
                    $whyText = '';
                }
                $msg = isset( $info['message'] ) ? ", {$info['message']}" : '';
 
                $text .= "$thing: {$info['status']}{$msg} $whyText\n";
            }
            $text .= "\n";
        }
 
        return trim( $text );
    }
}
 
$maintClass = CheckDependencies::class;
require_once RUN_MAINTENANCE_IF_MAIN;