Add project2project scenario

proposed/2022/PrivateAssetIndepdentFromExcludeAsset.md

@@ -23,7 +23,7 @@ We couldn't make this default experience because it'll break customers who rely
 <!-- Explain the proposal as if it were already implemented and you're teaching it to another person. -->
 <!-- Introduce new concepts, functional designs with real life examples, and low-fidelity mockups or  pseudocode to show how this proposal would look. -->
 The new ` PrivateAssetIndependent` property only affects pack operation (more specifically nuspec in nupkg file), but doesn't affect restore experience for current project so there would be no change in `project.assets.json` lock file.
-Experience for parent consuming project would be affected by which asset from `compile, runtime, contentFiles, build, buildMultitargeting, buildTransitive, analyzers, native` are flowing into them.
+Experience for parent consuming project would be affected by which asset from `compile, runtime, contentFiles, build, buildMultitargeting, buildTransitive, analyzers, native` are flowing into them for both `PackageReference` and `ProjectReference` consumptions.
 
 For the following table assume `PrivateAssetIndependent` is set `true` when creating package, iterating possible scenarios (not full list) for consuming parent project.
 
@@ -34,6 +34,24 @@ For the following table assume `PrivateAssetIndependent` is set `true` when crea
 | build | Enable msbuild imports | Build fails due to property/target value change |
 | analyzers | Code analyzers work | n/a |
 
+Here is brief summary for what would change for consuming `parent` project.
+
+Before change for given `asset`:
+IncludeAssets|PrivateAssets|Flows transitively
+--|--|--
+yes|yes|yes
+yes|no|no
+no|yes|no
+no|no|no
+
+After change for given `asset`:
+IncludeAssets|PrivateAsset|Flows transitively
+--|--|--
+yes|yes|yes
+yes|no|no
+no|yes|yes
+no|no|no
+
 #### Examples
 
 ##### Case 1 for PackageReference
@@ -49,6 +67,7 @@ Package reference in csproj file.
   <ItemGroup>
     <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.2.138-beta" PrivateAssets="none" ExcludeAssets="build" />
   </ItemGroup>
+```
 
 Before change nuspec file:
 
@@ -103,6 +122,38 @@ After change nuspec file:
     </dependencies>
 ```
 
+##### Case for Project to Project reference
+
+Package reference in parent `ClassLibrary1` csproj file.
+
+```.net
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\refissue\refissue.csproj" />
+  </ItemGroup>
+```
+
+```.net
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <VersionSuffix>beta</VersionSuffix>
+    <PrivateAssetIndependent>True</PrivateAssetIndependent>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Windows.CsWin32" Version="0.2.138-beta" PrivateAssets="none" ExcludeAssets="all" />
+  </ItemGroup>
+```
+
+Before change for `Microsoft.Windows.CsWin32.props` file in `build` asset doesn't flow to ClassLibrary1.csproj.nuget.g.props file in obj folder.
+
+After change for `Microsoft.Windows.CsWin32.props` file in `build` asset flow to ClassLibrary1.csproj.nuget.g.props file in obj folder.
+
 ### Technical explanation
 
 We already have a [logic](hhttps://github.com/NuGet/NuGet.Client/blob/380415d812681ebf1c8aa0bc21533d4710514fc3/src/NuGet.Core/NuGet.Commands/CommandRunners/PackCommandRunner.cs#L577-L582) that combines `IncludeAssets/ExcludeAssets` options with `PrivateAssets`, we just change precedence on that logic depending on opt-in property.