Change CopyToPublishDirectory on Content items instead of explicitly removing this from publish items

Fixes #2295

src/Microsoft.NET.Sdk.Razor/build/netstandard2.0/Sdk.Razor.CurrentVersion.targets

@@ -69,6 +69,11 @@ Copyright (c) .NET Foundation. All rights reserved.
       _RazorAddDebugSymbolsProjectOutputGroupOutput
     </DebugSymbolsProjectOutputGroupDependsOn>
 
+    <PrepareForBuildDependsOn>
+      $(PrepareForBuildDependsOn);
+      ResolveRazorGenerateInputs
+    </PrepareForBuildDependsOn>
+
     <PrepareForRunDependsOn>
       _RazorPrepareForRun;
       $(PrepareForRunDependsOn)
@@ -285,6 +290,8 @@ Copyright (c) .NET Foundation. All rights reserved.
   <!--
     Gathers input source files for code generation. This is a separate target so that we can avoid
     lots of work when there are no inputs for code generation.
+    This target runs as part of PrepareForBuild. This gives us an opportunitity to change things like CopyToPublishDirectory
+    for Content items before they are processed by other Build targets.
 
     NOTE: This target is called as part of an incremental build scenario in VS. Do not perform any work
     outside of calculating RazorGenerate items in this target.
@@ -305,6 +312,20 @@ Copyright (c) .NET Foundation. All rights reserved.
     <ItemGroup Condition="'$(EnableDefaultRazorGenerateItems)'=='true'">
       <RazorGenerate Include="@(Content)" Condition="'%(Content.Extension)'=='.cshtml'" />
     </ItemGroup>
+
+    <!--
+      Ideally we want to able to update all Content items that also appear in RazorGenerate to have
+      CopyToPublishDirectory=Never. However, there isn't a simple way to do this (https://github.com/Microsoft/msbuild/issues/1618). 
+      Instead, we'll update all cshtml Content items when EnableDefaultRazorGenerateItems=true and Razor Sdk is used for publishing.
+    -->
+    <ItemGroup Condition="
+      '$(EnableDefaultRazorGenerateItems)'=='true' and 
+      '$(CopyRazorGenerateFilesToPublishDirectory)'=='false' and 
+      '$(ResolvedRazorCompileToolset)'=='RazorSdk' and 
+      '$(RazorCompileOnPublish)'=='true'">
+      
+      <Content Condition="'%(Content.Extension)'=='.cshtml'" CopyToPublishDirectory="Never" />
+    </ItemGroup>
   </Target>
 
   <Target Name="AssignRazorGenerateTargetPaths" Condition="'@(RazorGenerate)' != ''">

test/Microsoft.AspNetCore.Razor.Design.Test/IntegrationTests/PublishIntegrationTest.cs

@@ -27,6 +27,10 @@ namespace Microsoft.AspNetCore.Razor.Design.IntegrationTests
             Assert.FileExists(result, PublishOutputPath, "SimpleMvc.Views.dll");
             Assert.FileExists(result, PublishOutputPath, "SimpleMvc.Views.pdb");
 
+            // Verify assets get published
+            Assert.FileExists(result, PublishOutputPath, "wwwroot", "js", "SimpleMvc.js");
+            Assert.FileExists(result, PublishOutputPath, "wwwroot", "css", "site.css");
+
             // By default refs and .cshtml files will not be copied on publish
             Assert.FileCountEquals(result, 0, Path.Combine(PublishOutputPath, "refs"), "*.dll");
             Assert.FileCountEquals(result, 0, Path.Combine(PublishOutputPath, "Views"), "*.cshtml");
@@ -294,6 +298,11 @@ namespace Microsoft.AspNetCore.Razor.Design.IntegrationTests
             Assert.FileExists(result, PublishOutputPath, "ClassLibrary.pdb");
             Assert.FileExists(result, PublishOutputPath, "ClassLibrary.Views.dll");
             Assert.FileExists(result, PublishOutputPath, "ClassLibrary.Views.pdb");
+
+            // Verify fix for https://github.com/aspnet/Razor/issues/2295. No cshtml files should be published from the app
+            // or the ClassLibrary.
+            Assert.FileCountEquals(result, 0, Path.Combine(PublishOutputPath, "refs"), "*.dll");
+            Assert.FileCountEquals(result, 0, Path.Combine(PublishOutputPath, "Views"), "*.cshtml");
         }
 
         [Fact]
@@ -310,5 +319,40 @@ namespace Microsoft.AspNetCore.Razor.Design.IntegrationTests
             Assert.FileDoesNotExist(result, OutputPath, "SimpleMvcFSharp.Views.dll");
             Assert.FileDoesNotExist(result, OutputPath, "SimpleMvcFSharp.Views.pdb");
         }
+
+        [Fact]
+        [InitializeTestProject("SimpleMvc")]
+        public async Task Publish_DoesNotPublishCustomRazorGenerateItems()
+        {
+            var additionalProjectContent = @"
+<PropertyGroup>
+    <EnableDefaultRazorGenerateItems>false</EnableDefaultRazorGenerateItems>
+</PropertyGroup>
+<ItemGroup>
+  <RazorGenerate Include=""Views\_ViewImports.cshtml"" />
+  <RazorGenerate Include=""Views\Home\Index.cshtml"" />
+</ItemGroup>
+";
+            AddProjectFileContent(additionalProjectContent);
+            var result = await DotnetMSBuild("Publish");
+
+            Assert.BuildPassed(result);
+
+            Assert.FileExists(result, PublishOutputPath, "SimpleMvc.dll");
+            Assert.FileExists(result, PublishOutputPath, "SimpleMvc.pdb");
+            Assert.FileExists(result, PublishOutputPath, "SimpleMvc.Views.dll");
+            Assert.FileExists(result, PublishOutputPath, "SimpleMvc.Views.pdb");
+
+            // Verify assets get published
+            Assert.FileExists(result, PublishOutputPath, "wwwroot", "js", "SimpleMvc.js");
+            Assert.FileExists(result, PublishOutputPath, "wwwroot", "css", "site.css");
+
+            // By default refs and .cshtml files will not be copied on publish
+            Assert.FileCountEquals(result, 0, Path.Combine(PublishOutputPath, "refs"), "*.dll");
+            // Custom RazorGenerate item does not get published
+            Assert.FileDoesNotExist(result, PublishOutputPath, "Views", "Home", "Home.cshtml");
+            // cshtml Content item that's not part of RazorGenerate gets published.
+            Assert.FileExists(result, PublishOutputPath, "Views", "Home", "About.cshtml");
+        }
     }
 }

test/testapps/SimpleMvc/wwwroot/css/site.css

@@ -0,0 +1,37 @@
+/* Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification\ 
+for details on configuring this project to bundle and minify static web assets. */
+body {
+    padding-top: 50px;
+    padding-bottom: 20px;
+}
+
+/* Wrapping element */
+/* Set some basic padding to keep content from hitting the edges */
+.body-content {
+    padding-left: 15px;
+    padding-right: 15px;
+}
+
+/* Carousel */
+.carousel-caption p {
+    font-size: 20px;
+    line-height: 1.4;
+}
+
+/* Make .svg files in the carousel display properly in older browsers */
+.carousel-inner .item img[src$=".svg"] {
+    width: 100%;
+}
+
+/* QR code generator */
+#qrCode {
+    margin: 15px;
+}
+
+/* Hide/rearrange for smaller screens */
+@media screen and (max-width: 767px) {
+    /* Hide captions */
+    .carousel-caption {
+        display: none;
+    }
+}

test/testapps/SimpleMvc/wwwroot/js/SimpleMvc.js

@@ -0,0 +1 @@
+// This is a test file