Restructure source generator into shared project

CommunityToolkit.Mvvm.SourceGenerators.Roslyn401/CommunityToolkit.Mvvm.SourceGenerators.Roslyn401.csproj

@@ -0,0 +1,6 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <Import Project="..\CommunityToolkit.Mvvm.SourceGenerators\CommunityToolkit.Mvvm.SourceGenerators.props" />
+  <Import Project="..\CommunityToolkit.Mvvm.SourceGenerators\CommunityToolkit.Mvvm.SourceGenerators.projitems" Label="Shared" />
+
+</Project>

CommunityToolkit.Mvvm.SourceGenerators.Roslyn430/CommunityToolkit.Mvvm.SourceGenerators.Roslyn430.csproj

@@ -0,0 +1,6 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <Import Project="..\CommunityToolkit.Mvvm.SourceGenerators\CommunityToolkit.Mvvm.SourceGenerators.props" />
+  <Import Project="..\CommunityToolkit.Mvvm.SourceGenerators\CommunityToolkit.Mvvm.SourceGenerators.projitems" Label="Shared" />
+
+</Project>

CommunityToolkit.Mvvm.SourceGenerators/CommunityToolkit.Mvvm.SourceGenerators.projitems

@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects Condition="'$(MSBuildVersion)' == '' Or '$(MSBuildVersion)' &lt; '16.0'">$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+    <HasSharedItems>true</HasSharedItems>
+    <SharedGUID>5e7f1212-a54b-40ca-98c5-1ff5cd1a1638</SharedGUID>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <Import_RootNamespace>CommunityToolkit.Mvvm.SourceGenerators</Import_RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)EmbeddedResources\INotifyPropertyChanged.cs">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)EmbeddedResources\NotNullAttribute.cs">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)EmbeddedResources\NotNullIfNotNullAttribute.cs">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)EmbeddedResources\ObservableObject.cs">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)EmbeddedResources\ObservableRecipient.cs">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </EmbeddedResource>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildThisFileDirectory)Attributes\NotNullWhenAttribute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Attributes\NullabilityAttributesGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\INotifyPropertyChangedGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\AttributeInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\INotifyPropertyChangedInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\ObservableRecipientInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\PropertyInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\TypedConstantInfo.Comparer.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\TypedConstantInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\TypedConstantInfo.Factory.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\Models\ValidationInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\ObservableObjectGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\ObservablePropertyGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\ObservablePropertyGenerator.Execute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\ObservableRecipientGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\ObservableValidatorValidateAllPropertiesGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\ObservableValidatorValidateAllPropertiesGenerator.Execute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\TransitiveMembersGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ComponentModel\TransitiveMembersGenerator.Execute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Diagnostics\Analyzers\FieldWithOrphanedDependentObservablePropertyAttributesAnalyzer.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Diagnostics\Analyzers\UnsupportedCSharpLanguageVersionAnalyzer.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Diagnostics\DiagnosticDescriptors.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Diagnostics\DiagnosticExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\AttributeDataExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\CompilationExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\HashCodeExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\IEqualityComparerExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\INamedTypeSymbolExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\IncrementalGeneratorInitializationContextExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\IncrementalValuesProviderExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\ISymbolExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\ITypeSymbolExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\MemberDeclarationSyntaxExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\SyntaxNodeExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Extensions\TypeDeclarationSyntaxExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\Comparer{T,TSelf}.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Helpers\HashCode.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Input\Models\CanExecuteExpressionType.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Input\Models\CommandInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Input\RelayCommandGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Input\RelayCommandGenerator.Execute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Messaging\IMessengerRegisterAllGenerator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Messaging\IMessengerRegisterAllGenerator.Execute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Messaging\Models\RecipientInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Models\HierarchyInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Models\HierarchyInfo.Syntax.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Models\Result.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Models\TypeInfo.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Polyfills\GeneratorAttributeSyntaxContext.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Polyfills\SyntaxValueProviderExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System.Runtime.CompilerServices\IsExternalInit.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <AdditionalFiles Include="$(MSBuildThisFileDirectory)AnalyzerReleases.Shipped.md" />
+    <AdditionalFiles Include="$(MSBuildThisFileDirectory)AnalyzerReleases.Unshipped.md" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="$(MSBuildThisFileDirectory)CommunityToolkit.Mvvm.SourceGenerators.props" />
+  </ItemGroup>
+</Project>

CommunityToolkit.Mvvm.SourceGenerators/CommunityToolkit.Mvvm.SourceGenerators.props

@@ -0,0 +1,38 @@
+<Project>
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <!--
+    The MVVM Toolkit source generators rely on Roslyn multi-targeting to support multiple versions of the Microsoft.CodeAnalysis.CSharp package.
+    This package reference actually needs a matching version of Roslyn to be available for consumers of the source generator, so if we always
+    used the latest version, the MVVM Toolkit would just fail to load for users of eg. an older version of Visual Studio. Thankfully, Roslyn
+    supports analyzers that bundle multiple versions in the same NuGet package, each in a subfolder with a name matching the Roslyn version.
+    To leverage this, this project receives the MvvmToolkitSourceGeneratorRoslynVersion property as input, so that the MVVM Toolkit can build
+    it multiple times with multiple versions during packing, to then extract each .dll and copy it to the right NuGet package folder.
+  -->
+  <PropertyGroup>
+
+    <!--
+      Get the Roslyn version to use from the name of the project importing this .props file.
+      All projects will use the "<PROJECT_NAME>.Roslyn<MAJOR><MINOR><PATCH>.csproj" naming scheme.
+    -->
+    <MvvmToolkitSourceGeneratorRoslynMajorVersion>$(MSBuildProjectName.Substring(45, 1))</MvvmToolkitSourceGeneratorRoslynMajorVersion>
+    <MvvmToolkitSourceGeneratorRoslynMinorVersion>$(MSBuildProjectName.Substring(46, 1))</MvvmToolkitSourceGeneratorRoslynMinorVersion>
+    <MvvmToolkitSourceGeneratorRoslynPatchVersion>$(MSBuildProjectName.Substring(47, 1))</MvvmToolkitSourceGeneratorRoslynPatchVersion>
+    <MvvmToolkitSourceGeneratorRoslynVersion>$(MvvmToolkitSourceGeneratorRoslynMajorVersion).$(MvvmToolkitSourceGeneratorRoslynMinorVersion).$(MvvmToolkitSourceGeneratorRoslynPatchVersion)</MvvmToolkitSourceGeneratorRoslynVersion>
+
+    <!--  The output path will end up being eg. "bin\Debug\roslyn4.0\netstandard2.0" (the trailing "netstandard2.0" is added automatically)  -->
+    <OutputPath>bin\$(Configuration)\roslyn$(MvvmToolkitSourceGeneratorRoslynVersion.Substring(0, 3))\</OutputPath>
+
+    <!-- Also define a "ROSLYN_<MAJOR>_<MINOR>" build constant, so the generator code can multi-target whenever needed and add any required polyfills -->
+    <DefineConstants>$(DefineConstants);ROSLYN_$(MvvmToolkitSourceGeneratorRoslynVersion.Substring(0, 3).Replace('.', '_'))</DefineConstants>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="$(MvvmToolkitSourceGeneratorRoslynVersion)" PrivateAssets="all" Pack="false" />
+  </ItemGroup>
+
+</Project>

CommunityToolkit.Mvvm.SourceGenerators/CommunityToolkit.Mvvm.SourceGenerators.shproj

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>5e7f1212-a54b-40ca-98c5-1ff5cd1a1638</ProjectGuid>
+    <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
+  </PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.Default.props" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.props" />
+  <PropertyGroup />
+  <Import Project="CommunityToolkit.Mvvm.SourceGenerators.projitems" Label="Shared" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.CSharp.targets" />
+</Project>

CommunityToolkit.Mvvm/CommunityToolkit.Mvvm.csproj

@@ -42,12 +42,8 @@
 
   <!-- Reference the various multi-targeted versions of the source generator project (one per Roslyn version) -->
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
-    <ProjectReference Include="..\CommunityToolkit.Mvvm.SourceGenerators\CommunityToolkit.Mvvm.SourceGenerators.csproj" ReferenceOutputAssembly="false">
-      <AdditionalProperties>MvvmToolkitSourceGeneratorRoslynVersion=4.0.1;MvvmToolkitIsGeneratingNuGetPackage=true</AdditionalProperties>
-    </ProjectReference>
-    <ProjectReference Include="..\CommunityToolkit.Mvvm.SourceGenerators\CommunityToolkit.Mvvm.SourceGenerators.csproj" ReferenceOutputAssembly="false">
-      <AdditionalProperties>MvvmToolkitSourceGeneratorRoslynVersion=4.3.0;MvvmToolkitIsGeneratingNuGetPackage=true</AdditionalProperties>
-    </ProjectReference>
+    <ProjectReference Include="..\CommunityToolkit.Mvvm.SourceGenerators.Roslyn401\CommunityToolkit.Mvvm.SourceGenerators.Roslyn401.csproj" ReferenceOutputAssembly="false" />
+    <ProjectReference Include="..\CommunityToolkit.Mvvm.SourceGenerators.Roslyn430\CommunityToolkit.Mvvm.SourceGenerators.Roslyn430.csproj" ReferenceOutputAssembly="false" />
   </ItemGroup>
 
   <ItemGroup Label="Package">