another way

BackendCommands.php

@@ -38,6 +38,36 @@ public function __construct()
         $this->filesystem = new Filesystem();
     }
 
+    /**
+     * @hook init @options-backend
+     *
+     * @param \Symfony\Component\Console\Input\InputInterface $input
+     * @param \Consolidation\AnnotatedCommand\AnnotationData  $annotationData
+     */
+    public function initCommands(InputInterface $input, AnnotationData $annotationData)
+    {
+        $this->projectDirectory = $input->getOption('project-directory') ?: Drush::bootstrapManager()->getComposerRoot();
+    }
+
+    /**
+     * Define default options for most backend commands.
+     *
+     * @hook option @options-backend
+     *
+     * @option project-directory The base directory of the project. Defaults to composer root of project.
+     *
+     * @param array $options
+     */
+    public function optionsBackend(Command $command, AnnotationData $annotationData)
+    {
+        $command->addOption(
+            'project-directory',
+            '',
+            InputOption::VALUE_NONE,
+            'The base directory of the project. Defaults to composer root of project. Option added by burdastyle backend commands.'
+        );
+    }
+
     /**
      * Prepare file system and code to be ready for install.
      *
@@ -127,12 +157,41 @@ public function updateDatabase()
     /**
      * Add option to command.
      *
-     * @hook option backend:create-testing-dump backend:install config:export config:import
+     * @hook option config:export
+     *
+     * @param \Symfony\Component\Console\Command\Command     $command
+     * @param \Consolidation\AnnotatedCommand\AnnotationData $annotationData
+     */
+    public function additionalConfigExportOptions(Command $command, AnnotationData $annotationData)
+    {
+        $command->addOption(
+            'project-directory',
+            '',
+            InputOption::VALUE_NONE,
+            'The base directory of the project. Defaults to composer root of project. Option added by burdastyle backend commands.'
+        );
+    }
+
+    /**
+     * @hook init config:export
+     *
+     * @param \Symfony\Component\Console\Input\InputInterface $input
+     * @param \Consolidation\AnnotatedCommand\AnnotationData  $annotationData
+     */
+    public function initConfigExportCommands(InputInterface $input, AnnotationData $annotationData)
+    {
+        $this->initCommands($input, $annotationData);
+    }
+
+    /**
+     * Add option to command.
+     *
+     * @hook option config:import
      *
      * @param \Symfony\Component\Console\Command\Command     $command
      * @param \Consolidation\AnnotatedCommand\AnnotationData $annotationData
      */
-    public function additionalBackendOptions(Command $command, AnnotationData $annotationData)
+    public function additionalConfigImportOptions(Command $command, AnnotationData $annotationData)
     {
         $command->addOption(
             'project-directory',
@@ -143,12 +202,12 @@ public function additionalBackendOptions(Command $command, AnnotationData $annot
     }
 
     /**
-     * @hook init backend:create-testing-dump backend:install config:export config:import
+     * @hook init config:import
      *
      * @param \Symfony\Component\Console\Input\InputInterface $input
      * @param \Consolidation\AnnotatedCommand\AnnotationData  $annotationData
      */
-    public function initBackendCommands(InputInterface $input, AnnotationData $annotationData)
+    public function initConfigImportCommands(InputInterface $input, AnnotationData $annotationData)
     {
         $this->initCommands($input, $annotationData);
     }

BackendCommandsTrait.php

@@ -7,7 +7,9 @@
 use Consolidation\SiteAlias\SiteAliasManagerAwareTrait;
 use Drupal\Core\Site\Settings;
 use Drush\Drush;
+use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Filesystem\Path;
 
 /**
@@ -36,18 +38,6 @@ trait BackendCommandsTrait
      */
     private $projectDirectory;
 
-    /**
-     * Init params.
-     *
-     * @param \Symfony\Component\Console\Input\InputInterface $input
-     * @param \Consolidation\AnnotatedCommand\AnnotationData  $annotationData
-     */
-    public function initCommands(InputInterface $input, AnnotationData $annotationData)
-    {
-        // Initialize project directory.
-        $this->projectDirectory = $input->getOption('project-directory') ?: Drush::bootstrapManager()->getComposerRoot();
-    }
-
     /**
      * Drush command wrapper.
      *