Use NuGet-Operation install HTTP header when using Install-Package cmdlet.

src/AddIns/Misc/PackageManagement/Cmdlets/Project/Src/InstallPackageCmdlet.cs

@@ -63,9 +63,11 @@ namespace ICSharpCode.PackageManagement.Cmdlets
 		void InstallPackage()
 		{
 			IPackageManagementProject project = GetProject();
+			using (project.SourceRepository.StartInstallOperation(Id)) {
 				InstallPackageAction action = CreateInstallPackageTask(project);
 				action.Execute();
 			}
+		}
 		
 		IPackageManagementProject GetProject()
 		{

src/AddIns/Misc/PackageManagement/Cmdlets/Test/Src/InstallPackageCmdletTests.cs

@@ -291,5 +291,36 @@ namespace PackageManagement.Cmdlets.Tests
 			
 			fakeConsoleHost.AssertFileConflictResolverIsDisposed();
 		}
+		
+		[Test]
+		public void ProcessRecord_SourceRepositoryIsOperationAware_InstallOperationStartedForPackage()
+		{
+			CreateCmdletWithoutActiveProject();
+			AddDefaultProjectToConsoleHost();
+			var operationAwareRepository = new FakeOperationAwarePackageRepository();
+			fakeConsoleHost.FakeProject.FakeSourceRepository = operationAwareRepository;
+			AddPackageSourceToConsoleHost();
+			SetIdParameter("Test");
+			
+			RunCmdlet();
+			
+			Assert.AreEqual(RepositoryOperationNames.Install, operationAwareRepository.OperationStarted);
+			Assert.AreEqual("Test", operationAwareRepository.MainPackageIdForOperationStarted);
+		}
+		
+		[Test]
+		public void ProcessRecord_SourceRepositoryIsOperationAware_InstallOperationStartedIsDisposed()
+		{
+			CreateCmdletWithoutActiveProject();
+			AddDefaultProjectToConsoleHost();
+			var operationAwareRepository = new FakeOperationAwarePackageRepository();
+			fakeConsoleHost.FakeProject.FakeSourceRepository = operationAwareRepository;
+			AddPackageSourceToConsoleHost();
+			SetIdParameter("Test");
+			
+			RunCmdlet();
+			
+			operationAwareRepository.AssertOperationIsDisposed();
+		}
 	}
 }