Conditionally enable content items in the razor SDK (#589)

* Move the globs from the project system into the Razor SDK on a separate file that can be imported by itself.
* Import the file conditionally based on the EnableRazorContent property

Author: javiercn

src/Razor/src/Microsoft.NET.Sdk.Razor/Sdk/Sdk.Razor.StaticAssets.ProjectSystem.props

@@ -0,0 +1,48 @@
+<!--
+***********************************************************************************************
+Sdk.Razor.StaticAssets.ProjectSystem.props
+
+WARNING:  DO NOT MODIFY this file unless you are knowledgeable about MSBuild and have
+          created a backup copy.  Incorrect changes to this file will make it
+          impossible to load or build your projects from the command-line or the IDE.
+
+Copyright (c) .NET Foundation. All rights reserved.
+***********************************************************************************************
+-->
+<Project ToolsVersion="14.0">
+
+  <!-- Properties for supporting static content -->
+  <PropertyGroup>
+
+    <!-- This is a contract we have with the Web SDK to allow them in the future to import this file
+         instead of the whole SDK if needed.
+     -->
+    <_WebProjectSystemGlobsPropsDefined>true</_WebProjectSystemGlobsPropsDefined>
+
+    <DefaultItemExcludes>$(DefaultItemExcludes);**\node_modules\**;node_modules\**</DefaultItemExcludes>
+    <DefaultItemExcludes>$(DefaultItemExcludes);**\jspm_packages\**;jspm_packages\**</DefaultItemExcludes>
+    <DefaultItemExcludes>$(DefaultItemExcludes);**\bower_components\**;bower_components\**</DefaultItemExcludes>
+    <DefaultWebContentItemExcludes>$(DefaultWebContentItemExcludes);wwwroot\**</DefaultWebContentItemExcludes>
+  </PropertyGroup>
+
+  <ItemGroup Condition="'$(EnableDefaultItems)' == 'true' And '$(EnableDefaultContentItems)' == 'true' ">
+    <!-- Publish everything under wwwroot, all JSON files, all config files and all Razor files -->
+    <Content Include="wwwroot\**" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder)" />
+    <Content Include="**\*.config" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" />
+    <Content Include="**\*.json" CopyToOutputDirectory="PreserveNewest" CopyToPublishDirectory="PreserveNewest" Exclude="$(DefaultItemExcludes);$(DefaultExcludesInProjectFolder);$(DefaultWebContentItemExcludes)" />
+
+    <!-- Set CopyToPublishDirectory to Never for items under AppDesignerFolder ("Properties", by default) to avoid publishing launchSettings.json -->
+    <Content Update="$(AppDesignerFolder)\**" CopyToPublishDirectory="Never" Condition="'$(AppDesignerFolder)' != ''"/>   
+
+    <!-- Remove Content items from other item types (in a way that CPS understands) -->
+    <None Remove="wwwroot\**;**\*.json;**\*.config" />
+    <Compile Remove="wwwroot\**" />
+    <EmbeddedResource Remove="wwwroot\**" />
+    
+    <!-- Keep track of the default content items for later to distinguish them from newly generated content items -->
+    <!-- It's important to keep this here so that it works well with the Web SDK -->
+    <_ContentIncludedByDefault Include="@(Content)" />
+
+  </ItemGroup>
+
+</Project>

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

@@ -74,4 +74,8 @@ Copyright (c) .NET Foundation. All rights reserved.
     <None Remove="**\*.razor" />
   </ItemGroup>
 
+  <Import 
+    Project="$(MSBuildThisFileDirectory)..\..\Sdk\Sdk.Razor.StaticAssets.ProjectSystem.props"
+    Condition=" '$(EnableRazorSdkContent)' == 'true' " />
+
 </Project>

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

@@ -10,6 +10,11 @@ Copyright (c) .NET Foundation. All rights reserved.
 ***********************************************************************************************
 -->
 <Project ToolsVersion="14.0" TreatAsLocalProperty="_RazorSdkTasksTFM;_Targeting30OrNewerRazorLangVersion">
+
+  <PropertyGroup>
+    <EnableDefaultContentItems Condition=" '$(EnableDefaultContentItems)' == '' ">true</EnableDefaultContentItems>
+  </PropertyGroup>
+
   <!-- 
     Targets supporting Razor MSBuild integration. Contain support for generating C# code using Razor
     and including the generated code in the project lifecycle, including compiling, publishing and producing