Mgmt rest client (#47665)

eng/Packages.Data.props

@@ -259,7 +259,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(IsGeneratorLibrary)' == 'true'">
-    <PackageReference Update="Microsoft.Generator.CSharp.ClientModel" Version="1.0.0-alpha.20241223.1" />
+    <PackageReference Update="Microsoft.Generator.CSharp.ClientModel" Version="1.0.0-alpha.20250106.3" />
   </ItemGroup>
 
   <!--

eng/packages/http-client-csharp/generator/Azure.Generator/src/AzureArmVisitor.cs

@@ -0,0 +1,48 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using Microsoft.Generator.CSharp.ClientModel;
+using Microsoft.Generator.CSharp.ClientModel.Providers;
+using Microsoft.Generator.CSharp.Primitives;
+using Microsoft.Generator.CSharp.Providers;
+using System.IO;
+
+namespace Azure.Generator
+{
+    // only apply for MPG
+    internal class AzureArmVisitor : ScmLibraryVisitor
+    {
+        /// <inheritdoc/>
+        protected override TypeProvider? Visit(TypeProvider type)
+        {
+            if (type is ClientProvider)
+            {
+                type.Update(modifiers: TransfromPublicModifiersToInternal(type), relativeFilePath: TransformRelativeFilePathForClient(type));
+            }
+            // TODO: uncomment this once resources are generated
+            //if (type is RestClientProvider)
+            //{
+            //    type.Update(modifiers: TransfromModifiers(type), relativeFilePath: TransformRelativeFilePathForRestClient(type));
+            //}
+            return type;
+        }
+
+        private static string TransformRelativeFilePathForClient(TypeProvider type)
+            => Path.Combine("src", "Generated", "RestOperations", $"{type.Name}RestOperations.cs");
+
+        private static string TransformRelativeFilePathForRestClient(TypeProvider type)
+            => Path.Combine("src", "Generated", "RestOperations", $"{type.Name}.RestClient.cs");
+
+        private static TypeSignatureModifiers TransfromPublicModifiersToInternal(TypeProvider type)
+        {
+            var modifiers = type.DeclarationModifiers;
+            if (modifiers.HasFlag(TypeSignatureModifiers.Public))
+            {
+                modifiers &= ~TypeSignatureModifiers.Public;
+                modifiers |= TypeSignatureModifiers.Internal;
+            }
+
+            return modifiers;
+        }
+    }
+}

eng/packages/http-client-csharp/generator/Azure.Generator/src/AzureClientPlugin.cs

@@ -49,6 +49,10 @@ public override void Configure()
         AddMetadataReference(MetadataReference.CreateFromFile(typeof(Response).Assembly.Location));
         var sharedSourceDirectory = Path.Combine(Path.GetDirectoryName(typeof(AzureClientPlugin).Assembly.Location)!, "Shared", "Core");
         AddSharedSourceDirectory(sharedSourceDirectory);
+        if (IsAzureArm.Value)
+        {
+            AddVisitor(new AzureArmVisitor());
+        }
     }
 
     /// <summary>

eng/packages/http-client-csharp/generator/Azure.Generator/src/AzureTypeFactory.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+using Azure.Generator.InputTransformation;
 using Azure.Generator.Primitives;
 using Azure.Generator.Providers;
 using Azure.Generator.Providers.Abstraction;
@@ -13,7 +14,6 @@
 using Microsoft.Generator.CSharp.Statements;
 using System;
 using System.ClientModel.Primitives;
-using System.Collections.Generic;
 using System.Text.Json;
 
 namespace Azure.Generator
@@ -107,20 +107,7 @@ public override MethodBodyStatement SerializeJsonValue(Type valueType, ValueExpr
         }
 
         /// <inheritdoc/>
-        protected override ClientProvider CreateClientCore(InputClient inputClient) => base.CreateClientCore(TransformInputClient(inputClient));
-
-        private InputClient TransformInputClient(InputClient client)
-        {
-            var operationsToKeep = new List<InputOperation>();
-            foreach (var operation in client.Operations)
-            {
-                // operations_list has been covered in Azure.ResourceManager already, we don't need to generate it in the client
-                if (operation.CrossLanguageDefinitionId != "Azure.ResourceManager.Operations.list")
-                {
-                    operationsToKeep.Add(operation);
-                }
-            }
-            return new InputClient(client.Name, client.Summary, client.Doc, operationsToKeep, client.Parameters, client.Parent);
-        }
+        protected override ClientProvider CreateClientCore(InputClient inputClient)
+            => AzureClientPlugin.Instance.IsAzureArm.Value ? base.CreateClientCore(InputClientTransformer.TransformInputClient(inputClient)) : base.CreateClientCore(inputClient);
     }
 }

eng/packages/http-client-csharp/generator/Azure.Generator/src/InputTransformation/InputClientTransformer.cs

@@ -0,0 +1,45 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using Microsoft.Generator.CSharp.Input;
+using System;
+using System.Collections.Generic;
+
+namespace Azure.Generator.InputTransformation
+{
+    internal static class InputClientTransformer
+    {
+        public static InputClient TransformInputClient(InputClient client)
+        {
+            var operationsToKeep = new List<InputOperation>();
+            foreach (var operation in client.Operations)
+            {
+                // operations_list has been covered in Azure.ResourceManager already, we don't need to generate it in the client
+                if (operation.CrossLanguageDefinitionId != "Azure.ResourceManager.Operations.list")
+                {
+                    var transformedOperation = new InputOperation(operation.Name, operation.ResourceName, operation.Summary, operation.Doc, operation.Deprecated, operation.Accessibility, TransformInputOperationParameters(operation), operation.Responses, operation.HttpMethod, operation.RequestBodyMediaType, operation.Uri, operation.Path, operation.ExternalDocsUrl, operation.RequestMediaTypes, operation.BufferResponse, operation.LongRunning, operation.Paging, operation.GenerateProtocolMethod, operation.GenerateConvenienceMethod, operation.CrossLanguageDefinitionId);
+                    operationsToKeep.Add(transformedOperation);
+                }
+            }
+            return new InputClient(client.Name, client.Summary, client.Doc, operationsToKeep, client.Parameters, client.Parent);
+        }
+
+        private static IReadOnlyList<InputParameter> TransformInputOperationParameters(InputOperation operation)
+        {
+            var parameters = new List<InputParameter>();
+            foreach (var parameter in operation.Parameters)
+            {
+                if (parameter.NameInRequest.Equals("subscriptionId", StringComparison.OrdinalIgnoreCase))
+                {
+                    // Always set subscriptionId to method parameter
+                    parameters.Add(new InputParameter(parameter.Name, parameter.NameInRequest, parameter.Summary, parameter.Doc, parameter.Type, parameter.Location, parameter.DefaultValue, InputOperationParameterKind.Method, parameter.IsRequired, parameter.IsApiVersion, parameter.IsResourceParameter, parameter.IsContentType, parameter.IsEndpoint, parameter.SkipUrlEncoding, parameter.Explode, parameter.ArraySerializationDelimiter, parameter.HeaderCollectionPrefix));
+                }
+                else
+                {
+                    parameters.Add(parameter);
+                }
+            }
+            return parameters;
+        }
+    }
+}