Round trip flow style for PSCustomObject

Signed-off-by: Gabriel Adrian Samfira <gsamfira@cloudbasesolutions.com>

Author: gabriel-samfira

lib/netstandard2.0/PowerShellYaml.Module.dll

@@ -43,6 +43,9 @@ New Features:
 * Enhanced PSCustomObject mode with metadata preservation
 * Validation for non-YamlBase nested classes with clear error messages
 * Automatic property name conversion (PascalCase -> hyphenated-case)
+* Added -Depth flag to ConvertTo-Yaml
+* Added -EmitTags to ConvertTo-Yaml
+* Added option to emit yaml using explicit block style (override the round-trip style from the document)
 
 Usage:
   # PSCustomObject mode with metadata
@@ -52,6 +55,13 @@ Usage:
   class MyConfig : YamlBase { [string]$Name }
   $config = $yaml | ConvertFrom-Yaml -As ([MyConfig])
 
+  # Convert flow style doc to block style doc
+  $yaml = '{hello: world, goodbye: world}'
+  ConvertFrom-Yaml $yaml -As ([pscustomobject]) | ConvertTo-Yaml -Options UseBlockStyle
+  hello: world
+  goodbye: world
+
+
 See examples/ for detailed usage patterns.
 
 # 0.4.12

lib/netstandard2.0/PowerShellYaml.dll

@@ -612,12 +612,16 @@ function ConvertTo-Yaml {
         } elseif ($script:PSObjectMetadataExtensions::IsEnhancedPSCustomObject($d)) {
             # Use metadata-aware serializer
             $MetadataAwareSerializer = $script:typedModuleAssembly.GetType('PowerShellYaml.Module.MetadataAwareSerializer')
-            # Extract indentedSequences option if using Options parameter
+            # Extract style options if using Options parameter
             $indentedSequences = $false
+            $useFlowStyle = $false
+            $useBlockStyle = $false
             if ($PSCmdlet.ParameterSetName -eq 'Options') {
                 $indentedSequences = $Options.HasFlag([SerializationOptions]::WithIndentedSequences)
+                $useFlowStyle = $Options.HasFlag([SerializationOptions]::UseFlowStyle)
+                $useBlockStyle = $Options.HasFlag([SerializationOptions]::UseBlockStyle)
             }
-            $yaml = $MetadataAwareSerializer::Serialize($d, $indentedSequences, $EmitTags.IsPresent, $Depth)
+            $yaml = $MetadataAwareSerializer::Serialize($d, $indentedSequences, $EmitTags.IsPresent, $Depth, $useFlowStyle, $useBlockStyle)
         } else {
             $wrt = New-Object 'System.IO.StringWriter'
             $norm = Convert-PSObjectToGenericObject $d

powershell-yaml.psd1

@@ -926,7 +926,7 @@ private static string GetTagFromType(object value) {
         };
     }
 
-    public static string Serialize(PSObject obj, bool indentedSequences = false, bool emitTags = false, int maxDepth = 100) {
+    public static string Serialize(PSObject obj, bool indentedSequences = false, bool emitTags = false, int maxDepth = 100, bool useFlowStyle = false, bool useBlockStyle = false) {
         var metadata = PSObjectMetadataExtensions.GetMetadata(obj);
         if (metadata == null) {
             throw new InvalidOperationException("Object does not have YAML metadata");
@@ -954,7 +954,18 @@ public static string Serialize(PSObject obj, bool indentedSequences = false, boo
         emitter.Emit(new StreamStart());
         emitter.Emit(new DocumentStart());
 
-        SerializePSObject(obj, metadata, emitter, MappingStyle.Block, emitTags, 0, maxDepth);
+        // Determine mapping style: explicit options override metadata
+        MappingStyle mappingStyle;
+        if (useFlowStyle) {
+            mappingStyle = MappingStyle.Flow;
+        } else if (useBlockStyle) {
+            mappingStyle = MappingStyle.Block;
+        } else {
+            // Use the original mapping style from metadata, or default to Block
+            mappingStyle = metadata.DocumentMappingStyle ?? MappingStyle.Block;
+        }
+
+        SerializePSObject(obj, metadata, emitter, mappingStyle, emitTags, 0, maxDepth);
 
         emitter.Emit(new DocumentEnd(true));
         emitter.Emit(new StreamEnd());