bug #1882 [TwigComponent] Restrict anonymous component lookup to Twig files in debug command (squrious)

This PR was squashed before being merged into the 2.x branch.

Discussion
----------

[TwigComponent] Restrict anonymous component lookup to Twig files in debug command

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| Issues        |
| License       | MIT

Hi!

The `debug:twig-component` command looks for files in the anonymous template directory, but fails if some files are actually not Twig components (like .md).

For example, with a `README.md` file in `templates/components`:

```shell
$ php bin/console debug:twig-component
[critical] Error thrown while running command "debug:twig-component". Message: "Unknown component "README.md". And no matching anonymous component template was found."

In ComponentFactory.php line 254:

  Unknown component "README.md". And no matching anonymous component template was found.

debug:twig-component [<name>]

```

This PR restricts the finder to `*.html.twig` files, so others are ignored.

Commits
-------

df82b4a [TwigComponent] Restrict anonymous component lookup to Twig files in debug command

Author: kbond

src/TwigComponent/src/Command/TwigComponentDebugCommand.php

@@ -151,12 +151,10 @@ private function findAnonymousComponents(): array
         $components = [];
         $anonymousPath = $this->twigTemplatesPath.'/'.$this->anonymousDirectory;
         $finderTemplates = new Finder();
-        $finderTemplates->files()->in($anonymousPath)->notPath('/_');
+        $finderTemplates->files()->in($anonymousPath)->notPath('/_')->name('*.html.twig');
         foreach ($finderTemplates as $template) {
             $component = str_replace('/', ':', $template->getRelativePathname());
-            if (str_ends_with($component, '.html.twig')) {
-                $component = substr($component, 0, -10);
-            }
+            $component = substr($component, 0, -10);
             $components[$component] = $component;
         }
 

src/TwigComponent/tests/Fixtures/templates/components/NotAComponent.md

@@ -0,0 +1 @@
+This file should not cause issues with the debug:twig:component command.

src/TwigComponent/tests/Integration/Command/TwigComponentDebugCommandTest.php

@@ -41,6 +41,15 @@ public function testWithNoMatchComponent(): void
         $this->assertStringContainsString('Unknown component "NoMatchComponent".', $commandTester->getDisplay());
     }
 
+    public function testNotComponentsIsNotListed(): void
+    {
+        $commandTester = $this->createCommandTester();
+        $result = $commandTester->execute(['name' => 'NotAComponent']);
+
+        $this->assertEquals(1, $result);
+        $this->assertStringContainsString('Unknown component "NotAComponent".', $commandTester->getDisplay());
+    }
+
     public function testWithOnePartialMatchComponent(): void
     {
         $commandTester = $this->createCommandTester();