Add support for @azure-typespec/http-client-csharp emitter in GenerateAndBuildLib.ps1

eng/scripts/automation/GenerateAndBuildLib.ps1

@@ -917,8 +917,15 @@ function GetSDKProjectFolder()
         if ($yml["parameters"] -And $yml["parameters"]["service-dir"]) {
             $service = $yml["parameters"]["service-dir"]["default"];
         }
+        # Support both old and new C# emitters
+        $csharpOpts = $null
         if ($yml["options"] -And $yml["options"]["@azure-tools/typespec-csharp"]) {
             $csharpOpts = $yml["options"]["@azure-tools/typespec-csharp"]
+        } elseif ($yml["options"] -And $yml["options"]["@azure-typespec/http-client-csharp"]) {
+            $csharpOpts = $yml["options"]["@azure-typespec/http-client-csharp"]
+        }
+
+        if ($csharpOpts) {
             if ($csharpOpts["package-dir"]) {
                 $packageDir = $csharpOpts["package-dir"]
             } elseif ($csharpOpts["namespace"]) {

eng/scripts/automation/test/GenerateAndBuildLib-functions.tests.ps1

@@ -200,4 +200,78 @@ options:
 
         {GetSDKProjectFolder -typespecConfigurationFile $testTspConfigFile2 -sdkRepoRoot "/test"} | Should -Throw "*namespace*"
     }
+
+    it("should work with new @azure-typespec/http-client-csharp emitter") {
+        $testTspConfigFileNew = Join-Path $testTspConfigDir "tspconfig-new-emitter.yaml"
+        $testConfigNewEmitter = @"
+parameters:
+  service-dir:
+    default: testservice
+options:
+  "@azure-typespec/http-client-csharp":
+    namespace: Azure.TestService.NewEmitter
+    service-dir: testservice
+"@
+        $testConfigNewEmitter | Out-File -FilePath $testTspConfigFileNew -Encoding UTF8
+
+        $testSdkRoot = "/test/sdk/root"
+        $result = GetSDKProjectFolder -typespecConfigurationFile $testTspConfigFileNew -sdkRepoRoot $testSdkRoot
+        $expected = Join-Path $testSdkRoot "testservice" "Azure.TestService.NewEmitter"
+        $result | Should -Be $expected
+    }
+
+    it("should prioritize package-dir over namespace with new emitter") {
+        $testTspConfigFileNewPackageDir = Join-Path $testTspConfigDir "tspconfig-new-emitter-package-dir.yaml"
+        $testConfigNewEmitterPackageDir = @"
+parameters:
+  service-dir:
+    default: testservice
+options:
+  "@azure-typespec/http-client-csharp":
+    package-dir: Azure.TestService.NewEmitter.PackageDir
+    namespace: Azure.TestService.NewEmitter
+    service-dir: testservice
+"@
+        $testConfigNewEmitterPackageDir | Out-File -FilePath $testTspConfigFileNewPackageDir -Encoding UTF8
+
+        $testSdkRoot = "/test/sdk/root"
+        $result = GetSDKProjectFolder -typespecConfigurationFile $testTspConfigFileNewPackageDir -sdkRepoRoot $testSdkRoot
+        $expected = Join-Path $testSdkRoot "testservice" "Azure.TestService.NewEmitter.PackageDir"
+        $result | Should -Be $expected
+    }
+
+    it("should prefer old emitter when both are present") {
+        $testTspConfigFileBoth = Join-Path $testTspConfigDir "tspconfig-both-emitters.yaml"
+        $testConfigBothEmitters = @"
+parameters:
+  service-dir:
+    default: testservice
+options:
+  "@azure-tools/typespec-csharp":
+    namespace: Azure.TestService.OldEmitter
+    service-dir: testservice
+  "@azure-typespec/http-client-csharp":
+    namespace: Azure.TestService.NewEmitter
+    service-dir: testservice
+"@
+        $testConfigBothEmitters | Out-File -FilePath $testTspConfigFileBoth -Encoding UTF8
+
+        $testSdkRoot = "/test/sdk/root"
+        $result = GetSDKProjectFolder -typespecConfigurationFile $testTspConfigFileBoth -sdkRepoRoot $testSdkRoot
+        $expected = Join-Path $testSdkRoot "testservice" "Azure.TestService.OldEmitter"
+        $result | Should -Be $expected
+    }
+
+    it("should throw error when neither emitter has namespace") {
+        $testTspConfigFileNoEmitter = Join-Path $testTspConfigDir "tspconfig-no-emitter.yaml"
+        $testConfigNoEmitter = @"
+parameters:
+  service-dir:
+    default: testservice
+options: {}
+"@
+        $testConfigNoEmitter | Out-File -FilePath $testTspConfigFileNoEmitter -Encoding UTF8
+
+        {GetSDKProjectFolder -typespecConfigurationFile $testTspConfigFileNoEmitter -sdkRepoRoot "/test"} | Should -Throw "*namespace*"
+    }
 }