Add cache keys to block build

src/View/BlockViewBuilder.php

@@ -147,8 +147,15 @@ class BlockViewBuilder {
 
     CacheableMetadata::createFromRenderArray($build)
       ->merge(CacheableMetadata::createFromObject($access))
+      ->merge(CacheableMetadata::createFromObject($block_plugin))
       ->applyTo($build);
 
+    if (!isset($build['#cache']['keys'])) {
+      $configuration['_wrapper'] = $wrapper;
+      $configuration_hash = hash('sha256', serialize($configuration));
+      $build['#cache']['keys'] = ['twig_tweak_block', $id, $configuration_hash];
+    }
+
     return $build;
   }
 

tests/src/Kernel/BlockViewBuilderTest.php

@@ -62,6 +62,11 @@ final class BlockViewBuilderTest extends KernelTestBase {
         'contexts' => ['user'],
         'tags' => ['tag_from_blockAccess'],
         'max-age' => 35,
+        'keys' => [
+          'twig_tweak_block',
+          'twig_tweak_test_foo',
+          '9ef25a303eb97a01011ea20c50e731590c000f8bc6196241020fc118cce68180',
+        ],
       ],
     ];
     self::assertSame($expected_build, $build);
@@ -72,6 +77,7 @@ final class BlockViewBuilderTest extends KernelTestBase {
     $expected_build['content']['#markup'] = 'Bar';
     $expected_build['#configuration']['label'] = 'Example';
     $expected_build['#configuration']['content'] = 'Bar';
+    $expected_build['#cache']['keys'][2] = '96b740819b50d416148484351f52de1c894b63cf59af255b502c9399c73b8557';
     self::assertSame($expected_build, $build);
     self::assertSame('<div><h2>Example</h2>Bar</div>', $this->renderPlain($build));
 
@@ -89,6 +95,11 @@ final class BlockViewBuilderTest extends KernelTestBase {
         'contexts' => ['user'],
         'tags' => ['tag_from_blockAccess'],
         'max-age' => 35,
+        'keys' => [
+          'twig_tweak_block',
+          'twig_tweak_test_foo',
+          '82b254ef229c95f336386ee50454e0cc56705e97c1991d68fe9afdb1fb401f3a',
+        ],
       ],
     ];
     self::assertSame($expected_build, $build);
@@ -102,6 +113,11 @@ final class BlockViewBuilderTest extends KernelTestBase {
         'contexts' => ['user'],
         'tags' => ['tag_from_blockAccess'],
         'max-age' => 35,
+        'keys' => [
+          'twig_tweak_block',
+          'twig_tweak_test_foo',
+          '9ef25a303eb97a01011ea20c50e731590c000f8bc6196241020fc118cce68180',
+        ],
       ],
     ];
     self::assertSame($expected_build, $build);