Reduce Razor SDK copy retries (#22448)

* Retry fewer times when building locally
* Fail as usual when building in CI

Author: pranavkm

src/Razor/Microsoft.NET.Sdk.Razor/src/Microsoft.NET.Sdk.Razor.csproj

@@ -61,14 +61,24 @@
       Targets="Build"
       Condition="'$(NoBuild)' != 'true'"
       ContinueOnError="true"  />
-
+    
+    <PropertyGroup Condition="'$(ContinuousIntegrationBuild)' != 'true'">
+      <_ContinueOnError>true</_ContinueOnError>
+      <_Retries>1</_Retries>
+    </PropertyGroup>
+    
+    <PropertyGroup Condition="'$(ContinuousIntegrationBuild)' == 'true'">
+      <_ContinueOnError>false</_ContinueOnError>
+      <_Retries>10</_Retries>
+    </PropertyGroup>
+    
     <ItemGroup>
       <RazorToolsOutput Include="$(SdkOutputPath)temp\**\*.*" />
       <MvcRazorExtensionOutput Include="$(ArtifactsBinDir)Microsoft.AspNetCore.Mvc.Razor.Extensions\$(Configuration)\netstandard2.0\Microsoft.AspNetCore.Mvc.Razor.Extensions.dll" />
     </ItemGroup>
 
-    <Copy SourceFiles="@(RazorToolsOutput)" DestinationFolder="$(SdkOutputPath)tools\netcoreapp3.0\" SkipUnchangedFiles="true" ContinueOnError="true" />
-    <Copy SourceFiles="@(MvcRazorExtensionOutput)" DestinationFolder="$(SdkOutputPath)extensions\mvc-3-0\" SkipUnchangedFiles="true" ContinueOnError="true">
+    <Copy SourceFiles="@(RazorToolsOutput)" DestinationFolder="$(SdkOutputPath)tools\netcoreapp3.0\" SkipUnchangedFiles="true" Retries="$(_Retries)" ContinueOnError="$(_ContinueOnError)" />
+    <Copy SourceFiles="@(MvcRazorExtensionOutput)" DestinationFolder="$(SdkOutputPath)extensions\mvc-3-0\" SkipUnchangedFiles="true" Retries="$(_Retries)" ContinueOnError="$(_ContinueOnError)">
       <Output TaskParameter="CopiedFiles" ItemName="FileWrites" />
     </Copy>
 
@@ -80,7 +90,7 @@
       <ProjectOutput Include="$(ArtifactsBinDir)Microsoft.NET.Sdk.Razor\$(Configuration)\net46*\System.Reflection.Metadata.dll" />
     </ItemGroup>
 
-    <Copy SourceFiles="@(ProjectOutput)" DestinationFiles="$(SdkOutputPath)tasks\%(RecursiveDir)%(FileName)%(Extension)" SkipUnchangedFiles="true" ContinueOnError="true" >
+    <Copy SourceFiles="@(ProjectOutput)" DestinationFiles="$(SdkOutputPath)tasks\%(RecursiveDir)%(FileName)%(Extension)" SkipUnchangedFiles="true" Retries="$(_Retries)" ContinueOnError="$(_ContinueOnError)">
       <Output TaskParameter="CopiedFiles" ItemName="FileWrites" />
     </Copy>