[Serializer] Add context option to configure the indentation of nested nodes for YamlEncoder

dbu · nicolas-grekas · commit ee371d12de13 · 2022-09-29T11:28:16.000+02:00
diff --git a/src/Symfony/Component/Serializer/Encoder/YamlEncoder.php b/src/Symfony/Component/Serializer/Encoder/YamlEncoder.php
@@ -28,7 +28,17 @@ class YamlEncoder implements EncoderInterface, DecoderInterface
 
     public const PRESERVE_EMPTY_OBJECTS = 'preserve_empty_objects';
 
+    /**
+     * Override the amount of spaces to use for indentation of nested nodes.
+     *
+     * This option only works in the constructor, not in calls to `encode`.
+     */
+    public const YAML_INDENTATION = 'yaml_indentation';
+
     public const YAML_INLINE = 'yaml_inline';
+    /**
+     * Initial indentation for root element.
+     */
     public const YAML_INDENT = 'yaml_indent';
     public const YAML_FLAGS = 'yaml_flags';
 
@@ -46,8 +56,12 @@ public function __construct(Dumper $dumper = null, Parser $parser = null, array
             throw new RuntimeException('The YamlEncoder class requires the "Yaml" component. Install "symfony/yaml" to use it.');
         }
 
-        $this->dumper = $dumper ?? new Dumper();
+        if (!$dumper) {
+            $dumper = \array_key_exists(self::YAML_INDENTATION, $defaultContext) ? new Dumper($defaultContext[self::YAML_INDENTATION]) : new Dumper();
+        }
+        $this->dumper = $dumper;
         $this->parser = $parser ?? new Parser();
+        unset($defaultContext[self::YAML_INDENTATION]);
         $this->defaultContext = array_merge($this->defaultContext, $defaultContext);
     }
 
