Remove source csproj from text-only packages (#360)

Author: MichaelSimons

src/Directory.Build.targets

@@ -53,7 +53,12 @@
           @(PotentialCompileSrc);
           **\*.csproj;
           @(NuGetGeneratedMetadataFile);
-          "/>
+          "
+        Condition="'$(TextOnlyPackage)' != 'true'" />
+      <StructureFile
+        Include="**\*"
+        Exclude="$(MSBuildProjectFullPath)"
+        Condition="'$(TextOnlyPackage)' == 'true'"/>
 
       <StaticAssetFile
         Include="@(StructureFile)"
@@ -109,7 +114,6 @@
 
     <PropertyGroup>
       <NuspecFile>$(TFMPackTempOutputDir)@(NuspecFile)</NuspecFile>
-      <NuspecFile Condition="'$(PackNuspecInPlace)' == 'true'">@(NuspecFile)</NuspecFile>
     </PropertyGroup>
   </Target>
 

src/textOnlyPackages/Directory.Build.props

@@ -2,7 +2,7 @@
   <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props, $(MSBuildThisFileDirectory)..))" />
 
   <PropertyGroup>
-    <PackNuspecInPlace>true</PackNuspecInPlace>
+    <TextOnlyPackage>true</TextOnlyPackage>
 
     <TargetFramework>netstandard2.0</TargetFramework>
     <IncludeBuildOutput>false</IncludeBuildOutput>