Correctly check for .NET Core before creating config files. (#818)

* Small refactoring of the .NET Core check.

* Ensuring licenses.

GoogleCloudExtension/GoogleCloudExtension.Deployment/GoogleCloudExtension.Deployment.csproj

@@ -94,6 +94,7 @@
     <Compile Include="GkeDeployment.cs" />
     <Compile Include="GkeDeploymentResult.cs" />
     <Compile Include="IParsedProject.cs" />
+    <Compile Include="IParsedProjectExtensions.cs" />
     <Compile Include="IToolsPathProvider.cs" />
     <Compile Include="KnownProjectTypes.cs" />
     <Compile Include="NetCoreAppUtils.cs" />

GoogleCloudExtension/GoogleCloudExtension.Deployment/IParsedProjectExtensions.cs

@@ -0,0 +1,39 @@
+// Copyright 2017 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GoogleCloudExtension.Deployment
+{
+    /// <summary>
+    /// Useful checks for projects.
+    /// </summary>
+    public static class IParsedProjectExtensions
+    {
+        /// <summary>
+        /// Determines if the given project is a .NET Core project or not.
+        /// </summary>
+        /// <param name="project">The project to check.</param>
+        /// <returns>Returns true if the project is a .NET Core project, false otherwise.</returns>
+        public static bool IsAspNetCoreProject(this IParsedProject project)
+            => project.ProjectType == KnownProjectTypes.NetCoreWebApplication1_0 ||
+               project.ProjectType == KnownProjectTypes.NetCoreWebApplication1_1 ||
+               project.ProjectType == KnownProjectTypes.NetCoreWebApplication2_0;
+    }
+}

GoogleCloudExtension/GoogleCloudExtension/GenerateConfigurationCommand/GenerateConfigurationContextMenuCommand.cs

@@ -162,7 +162,7 @@ private void OnBeforeQueryStatus(object sender, EventArgs e)
 
             // Ensure that the menu entry is only available for ASP.NET Core projects.
             var selectedProject = SolutionHelper.CurrentSolution.SelectedProject;
-            if (selectedProject == null || !PublishDialogWindow.CanPublish(selectedProject))
+            if (selectedProject == null || !selectedProject.IsAspNetCoreProject())
             {
                 menuCommand.Visible = false;
             }

GoogleCloudExtension/GoogleCloudExtension/PublishDialogSteps/ChoiceStep/ChoiceStepViewModel.cs

@@ -69,7 +69,7 @@ private IEnumerable<Choice> GetChoicesForCurrentProject()
                     Name = Resources.PublishDialogChoiceStepAppEngineFlexName,
                     Command = new ProtectedCommand(
                         OnAppEngineChoiceCommand,
-                        canExecuteCommand: IsSupportedNetCoreProject(_dialog.Project)),
+                        canExecuteCommand: _dialog.Project.IsAspNetCoreProject()),
                     Icon = s_appEngineIcon.Value,
                     ToolTip = Resources.PublishDialogChoiceStepAppEngineToolTip
                 },
@@ -78,7 +78,7 @@ private IEnumerable<Choice> GetChoicesForCurrentProject()
                     Name = Resources.PublishDialogChoiceStepGkeName,
                     Command = new ProtectedCommand(
                         OnGkeChoiceCommand,
-                        canExecuteCommand:IsSupportedNetCoreProject(_dialog.Project)),
+                        canExecuteCommand:_dialog.Project.IsAspNetCoreProject()),
                     Icon = s_gkeIcon.Value,
                     ToolTip = Resources.PublishDialogChoiceStepGkeToolTip
                 },
@@ -133,10 +133,5 @@ public static IPublishDialogStep CreateStep()
 
             return viewModel;
         }
-
-        private static bool IsSupportedNetCoreProject(IParsedProject project)
-            => project.ProjectType == KnownProjectTypes.NetCoreWebApplication1_0 ||
-               project.ProjectType == KnownProjectTypes.NetCoreWebApplication1_1 ||
-               project.ProjectType == KnownProjectTypes.NetCoreWebApplication2_0;
     }
 }