Issue #3447198 by phenaproxima, alexpott, nicxvan, larowlan: RecipeCommand mistakenly tries to apply a recipe even if you don't give it a valid directory

(cherry picked from commit 389c2bee0b)

core/lib/Drupal/Core/Recipe/RecipeCommand.php

@@ -65,6 +65,7 @@ final class RecipeCommand extends Command {
     $recipe_path = $input->getArgument('path');
     if (!is_string($recipe_path) || !is_dir($recipe_path)) {
       $io->error(sprintf('The supplied path %s is not a directory', $recipe_path));
+      return 1;
     }
     // Recipes can only be applied to an already-installed site.
     $container = $this->boot()->getContainer();

core/tests/Drupal/FunctionalTests/Core/Recipe/RecipeCommandTest.php

@@ -91,6 +91,18 @@ class RecipeCommandTest extends BrowserTestBase {
     $this->assertStringContainsString('There were validation errors in system.image:', $process->getErrorOutput());
   }
 
+  /**
+   * Tests the recipe command with a non-existent directory.
+   */
+  public function testErrorOnNonExistentDirectory(): void {
+    $process = $this->applyRecipe('core/tests/fixtures/recipes/does_not_exist', 1);
+
+    // The directory error should be the only error visible.
+    $output = trim(preg_replace('/\s+/', ' ', $process->getOutput()));
+    $this->assertSame('[ERROR] The supplied path core/tests/fixtures/recipes/does_not_exist is not a directory', $output);
+    $this->assertEmpty($process->getErrorOutput());
+  }
+
   /**
    * Asserts that the current set of checkpoints matches the given labels.
    *

core/tests/Drupal/FunctionalTests/Core/Recipe/RecipeTestTrait.php

@@ -58,7 +58,6 @@ trait RecipeTestTrait {
    */
   protected function applyRecipe(string $path, int $expected_exit_code = 0): Process {
     assert($this instanceof BrowserTestBase);
-    $this->assertDirectoryExists($path);
 
     $arguments = [
       (new PhpExecutableFinder())->find(),