Merge branch 'main' into copilot/add-python-test-case

Author: msyyc

.chronus/changes/add-body-or-no-content-scenario-2026-8-14.md

@@ -0,0 +1,16 @@
+---
+changeKind: feature
+packages:
+  - "@typespec/http-specs"
+---
+
+Add scenario for an operation whose successful response is either a model body (`200`) or no content (`204`).
+
+```tsp
+op getBody(): {
+  @statusCode statusCode: 200;
+  @body layout: BlobLayout;
+} | {
+  @statusCode statusCode: 204;
+};
+```

.chronus/changes/josh-experimental-diagnostic-id-2026-7-14-15-54-50.md

@@ -0,0 +1,12 @@
+---
+changeKind: feature
+packages:
+  - "@typespec/http-client"
+---
+
+Add diagnostic and dependency metadata to `@experimental`.
+
+```typespec
+@experimental(#{ diagnosticId: "C", dependsOn: #["A", "B"] })
+op bar(): void;
+```

.chronus/changes/playground-preserve-sample-config-2026-08-13.md

@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@typespec/playground"
+---
+
+Preserve a sample's preferred emitter and compiler options when loading it in the playground.

docker/Dockerfile

@@ -12,8 +12,16 @@ COPY . /app
 #   && tdnf clean all
 
 WORKDIR /app
-RUN npm install -g pnpm
-RUN pnpm install --filter "@typespec/compiler..."
+
+# Install exact version of pnpm to avoid problems with private registries
+RUN --mount=type=secret,id=npmrc \
+  NPM_CONFIG_USERCONFIG=/run/secrets/npmrc \
+  npm install -g $(node -p "require('./package.json').packageManager")
+
+RUN --mount=type=secret,id=npmrc \
+  NPM_CONFIG_USERCONFIG=/run/secrets/npmrc \
+  pnpm install --filter "@typespec/compiler..."
+
 RUN pnpm --filter "@typespec/compiler..." run build
 
 WORKDIR /app/packages/compiler
@@ -26,6 +34,8 @@ FROM mcr.microsoft.com/azurelinux/base/nodejs:24
 
 COPY --from=builder /app/packages/compiler/*.tgz /tmp/compiler.tgz
 
-RUN npm install -g /tmp/compiler.tgz && rm /tmp/compiler.tgz
+RUN --mount=type=secret,id=npmrc \
+  NPM_CONFIG_USERCONFIG=/run/secrets/npmrc \
+  npm install --verbose -g /tmp/compiler.tgz && rm /tmp/compiler.tgz
 
 ENTRYPOINT ["tsp"]

eng/tsp-core/pipelines/publish.yml

@@ -98,8 +98,11 @@ extends:
                   azureContainerRegistry: azsdkengsys.azurecr.io
                   command: login
 
+              - template: /eng/common/pipelines/templates/steps/create-authenticated-npmrc.yml
+
               - script: |
                   docker build -f ./docker/Dockerfile \
+                    --secret id=npmrc,src="$HOME/.npmrc" \
                     -t $(imageName):latest \
                     .
                 displayName: "Build"

packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/Providers/EnumProvider.cs

@@ -29,7 +29,7 @@ public static EnumProvider Create(InputEnumType input, TypeProvider? declaringTy
             return input.IsExtensible ? extensibleEnumProvider : fixedEnumProvider;
         }
 
-        protected EnumProvider(InputEnumType? input)
+        protected EnumProvider(InputEnumType? input) : base(input)
         {
             _inputType = input;
             _deprecated = input?.Deprecation;

packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/src/Providers/TypeProvider.cs

@@ -9,6 +9,7 @@
 using Microsoft.TypeSpec.Generator.EmitterRpc;
 using Microsoft.TypeSpec.Generator.Expressions;
 using Microsoft.TypeSpec.Generator.Input;
+using Microsoft.TypeSpec.Generator.Input.Extensions;
 using Microsoft.TypeSpec.Generator.Primitives;
 using Microsoft.TypeSpec.Generator.SourceInput;
 using Microsoft.TypeSpec.Generator.Statements;
@@ -49,10 +50,30 @@ protected TypeProvider() : this(null)
                 _declaringTypeName.Value);
 
         private protected virtual TypeProvider? BuildLastContractView(string? generatedTypeName = null, string? generatedTypeNamespace = null)
-            => CodeModelGenerator.Instance.SourceInputModel.FindForTypeInLastContract(
-                generatedTypeNamespace ?? CustomCodeView?.Type.Namespace ?? BuildNamespace(),
-                generatedTypeName ?? CustomCodeView?.Name ?? BuildName(),
+        {
+            var typeNamespace = generatedTypeNamespace ?? CustomCodeView?.Type.Namespace ?? BuildNamespace();
+            var typeName = generatedTypeName ?? CustomCodeView?.Name ?? BuildName();
+            var lastContractView = CodeModelGenerator.Instance.SourceInputModel.FindForTypeInLastContract(
+                typeNamespace,
+                typeName,
+                _declaringTypeName.Value);
+            if (lastContractView is not null || _inputType is null || _inputType.IsExactName)
+            {
+                return lastContractView;
+            }
+
+            var originalName = _inputType.Name.ToIdentifierName();
+            var normalizedOriginalName = originalName.NormalizeCSharpAcronyms();
+            if (normalizedOriginalName == originalName || typeName != normalizedOriginalName)
+            {
+                return null;
+            }
+
+            return CodeModelGenerator.Instance.SourceInputModel.FindForTypeInLastContract(
+                typeNamespace,
+                originalName,
                 _declaringTypeName.Value);
+        }
 
         private static string? GetDeclaringTypeName(TypeProvider? declaringTypeProvider)
         {
@@ -801,9 +822,11 @@ private void ResetMembersBasedOnIdentityChange(string? name = null, string? @nam
             _customCodeView = new(BuildCustomCodeView(name ?? Type.Name, @namespace ?? Type.Namespace));
             name = _customCodeView.Value?.Name ?? name ?? Type.Name;
             @namespace = _customCodeView.Value?.Type.Namespace ?? @namespace ?? Type.Namespace;
-            _lastContractView = new(BuildLastContractView(
+            var lastContractView = BuildLastContractView(
                 name,
-                @namespace));
+                @namespace);
+            _lastContractView = new(lastContractView);
+            name = _customCodeView.Value?.Name ?? lastContractView?.Name ?? name;
             // recalculate declaration modifiers and constructors
             _declarationModifiers = null;
             // constructors might change based on declaration modifier changes

packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/test/Providers/EnumProviders/EnumProviderTests.cs

@@ -128,6 +128,26 @@ await MockHelpers.LoadMockGeneratorAsync(
             Assert.AreEqual("IpKind", enumType.Name);
         }
 
+        [Test]
+        public async Task BuildEnumType_BackCompatTakesPrecedenceAfterNamespaceUpdate()
+        {
+            await MockHelpers.LoadMockGeneratorAsync(
+                createCSharpTypeCore: (inputType) => typeof(string),
+                lastContractCompilation: async () => await Helpers.GetCompilationFromDirectoryAsync());
+            var input = InputFactory.StringEnum(
+                "IpKind",
+                [("Value", "value")],
+                clientNamespace: "Sample");
+
+            var enumType = EnumProvider.Create(input);
+            Assert.AreEqual("IPKind", enumType.Name);
+
+            enumType.Update(@namespace: "Sample.Models");
+
+            Assert.AreEqual("IpKind", enumType.Name);
+            Assert.IsNotNull(enumType.LastContractView);
+        }
+
         // Validates the api version enum
         [TestCase]
         public void BuildEnumType_ValidateApiVersionEnum()

packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/test/Providers/EnumProviders/TestData/EnumProviderTests/BuildEnumType_BackCompatTakesPrecedenceAfterNamespaceUpdate/IpKind.cs

@@ -0,0 +1,7 @@
+namespace Sample.Models
+{
+    public enum IpKind
+    {
+        Value
+    }
+}

packages/http-client-csharp/generator/Microsoft.TypeSpec.Generator/test/Providers/ModelProviders/ModelProviderTests.cs

@@ -105,6 +105,36 @@ await MockHelpers.LoadMockGeneratorAsync(
             Assert.IsNotNull(modelProvider.Properties.SingleOrDefault(p => p.Name == "IpAddressProperty"));
         }
 
+        [Test]
+        public async Task TestBuildName_BackCompatTakesPrecedenceAfterNamespaceUpdate()
+        {
+            var inputModel = InputFactory.Model(
+                "IpAddress",
+                @namespace: "Sample",
+                properties:
+                [
+                    InputFactory.Property("dbName", InputPrimitiveType.String),
+                    InputFactory.Property("osProfile", InputPrimitiveType.String),
+                    InputFactory.Property("IpAddress", InputPrimitiveType.String)
+                ]);
+            await MockHelpers.LoadMockGeneratorAsync(
+                inputModelTypes: [inputModel],
+                lastContractCompilation: async () => await Helpers.GetCompilationFromDirectoryAsync());
+
+            var modelProvider = CodeModelGenerator.Instance.TypeFactory.CreateModel(inputModel);
+
+            Assert.IsNotNull(modelProvider);
+            Assert.AreEqual("IPAddress", modelProvider!.Name);
+
+            modelProvider.Update(@namespace: "Sample.Models");
+
+            Assert.AreEqual("IpAddress", modelProvider.Name);
+            Assert.IsNotNull(modelProvider.LastContractView);
+            Assert.IsNotNull(modelProvider.Properties.SingleOrDefault(p => p.Name == "DbName"));
+            Assert.IsNotNull(modelProvider.Properties.SingleOrDefault(p => p.Name == "OSProfile"));
+            Assert.IsNotNull(modelProvider.Properties.SingleOrDefault(p => p.Name == "IpAddressProperty"));
+        }
+
         // Validates that the property body's setter is correctly set based on the property type
         [TestCaseSource(nameof(BuildProperties_ValidatePropertySettersTestCases))]
         public void TestBuildProperties_ValidatePropertySetters(InputModelProperty inputModelProperty, CSharpType type, bool hasSetter)