Move a few things around and add comments

installer/starshot_installer.profile

@@ -16,17 +16,19 @@ use Symfony\Component\Process\ExecutableFinder;
 function starshot_installer_install_tasks(): array {
   return [
     'starshot_installer_choose_template' => [
-      'run' => INSTALL_TASK_RUN_IF_REACHED,
-      'display_name' => t('Choose template'),
+      // Because the choice of template is currently hard-coded, this should
+      // not be presented to the user.
+      // 'display_name' => t('Choose template'),
     ],
-    'starshot_installer_apply_recipes' => [
+    'starshot_installer_apply_template' => [
       'type' => 'batch',
-      'display_name' => t('Apply recipes'),
-    ],
-    'starshot_installer_additional_recipes' => [
-      'run' => INSTALL_TASK_RUN_IF_REACHED,
-      'display_name' => t('Apply additional recipes'),
     ],
+    // 'starshot_installer_choose_add_on_recipes' => [
+      // We don't currently have the ability to present add-on recipes, so for
+      // now this tasks doesn't do anything and is invisible to users.
+      // @todo Fill this in after https://www.drupal.org/i/3450629 is fixed.
+      // 'display_name' => t('Choose add-ons'),
+    // ],
     'starshot_installer_uninstall_myself' => [
       // As a final task, this profile should uninstall itself.
     ],
@@ -100,27 +102,41 @@ function _starshot_installer_install_configure_form_submit(array &$form, FormSta
 }
 
 /**
- * Runs a batch job that applies all of the Starshot recipes.
+ * Presents the user which a choice of which template should set up the site.
  *
- * @param $install_state
+ * @param array $install_state
+ *   An array of information about the current installation state.
+ *
+ * @see starshot_installer_apply_template()
+ */
+function starshot_installer_choose_template(array &$install_state): void {
+  // For now, hard-code the choice to the main Starshot recipe. When more
+  // choices are available, this should present a form whose submit handler
+  // should set the `template` install parameter for
+  // starshot_installer_apply_template() to act upon.
+  $install_state['parameters']['template'] = Drupal::root() . '/recipes/starshot';
+}
+
+/**
+ * Runs a batch job that applies the template recipe.
+ *
+ * @param array $install_state
  *   An array of information about the current installation state.
  *
  * @return array
  *   The batch job definition.
  */
-function starshot_installer_apply_recipes(&$install_state): array {
-  if (!empty($install_state['parameters']['template'])) {
-    $batch = new BatchBuilder();
-    $batch->setTitle(t('Applying recipes'));
+function starshot_installer_apply_template(array &$install_state): array {
+  $batch = new BatchBuilder();
+  $batch->setTitle(t('Applying recipes'));
 
-    $recipe = Recipe::createFromDirectory(Drupal::root() . $install_state['parameters']['template']);
-    Drupal::classResolver(InputCollector::class)->prepare($recipe);
+  $recipe = Recipe::createFromDirectory($install_state['parameters']['template']);
+  Drupal::classResolver(InputCollector::class)->prepare($recipe);
 
-    foreach (RecipeRunner::toBatchOperations($recipe) as [$callback, $arguments]) {
-      $batch->addOperation($callback, $arguments);
-    }
-    return $batch->toArray();
+  foreach (RecipeRunner::toBatchOperations($recipe) as [$callback, $arguments]) {
+    $batch->addOperation($callback, $arguments);
   }
+  return $batch->toArray();
 }
 
 /**
@@ -131,25 +147,3 @@ function starshot_installer_uninstall_myself(): void {
     'starshot_installer',
   ]);
 }
-
-/**
- * Sets up Starshot base recipe.
- *
- * @param $install_state
- *   An array of information about the current installation state.
- *
- * @see starshot_installer_apply_recipes()
- */
-function starshot_installer_choose_template(&$install_state) {
-  $install_state['parameters']['template'] = '/recipes/starshot';
-}
-
-/**
- * Gets additional recipes list.
- *
- * @param $install_state
- *   An array of information about the current installation state.
- */
-function starshot_installer_additional_recipes(&$install_state) {
-  // @todo Get list once https://www.drupal.org/project/project_browser/issues/3450629 is fixed.
-}