Switch ApiCompat to use PackageDownload

Turns out instead of using the apicompat project workaround
we can use a PackageDownload reference to get the last shipped
package. This allows us to do the apicompat check completely
inside the project we are checking.

Author: weshaggard

CONTRIBUTING.md

@@ -229,10 +229,7 @@ dotnet build eng\service.proj /p:ServiceDirectory=eventhub /p:UpdateSourceOnBuil
 .NET is using the [ApiCompat tool](https://github.com/dotnet/arcade/tree/master/src/Microsoft.DotNet.ApiCompat) to enforce API compatibility between versions. Builds of GA'ed libraries will fail locally and in CI if there are breaking changes.
 
 ### How it works
-We use a dummy project called [ApiCompat](https://github.com/Azure/azure-sdk-for-net/tree/master/eng/ApiCompat/ApiCompat.csproj) to enforce API compatibility between the GA'ed libraries and the most recent version available on Nuget. This project includes package references to the GA'ed library and to Microsoft.DotNet.ApiCompat.
-Each library needs to provide a `ApiCompatVersion` property which is set to the last GA'ed version of the library which is used to compare APIs with the current to ensure no breaks
-have been introduced. 
-The `ApiCompatVerification` target defined in `ApiCompat.csproj` is referenced in the [eng/Directory.Build.Data.targets](https://github.com/Azure/azure-sdk-for-net/blob/master/eng/Directory.Build.Data.targets) which causes this target to be executed for each csproj that has the `ApiCompatVersion` property set. For libraries that wish to disable the APICompat check they can remove the `ApiCompatVersion` property from their project. Our version bump automation will automatically add or increment the `ApiCompatVersion` property to the project when it detects that the version it is changing was a GA version which usually indicates that we just shipped that GA version and so it should be the new baseline for api checks. 
+Each library needs to provide a `ApiCompatVersion` property which is set to the last GA'ed version of the library that will be used to compare APIs with the current to ensure no breaks have been introduced. Projects with this property set will download the specified package and the ApiCompat (Microsoft.DotNet.ApiCompat) tools package as part of the restore step of the project. Then as a post build step of the project it will run ApiCompat to verify the current APIs are compatible with the last GA'ed version of the APIs. For libraries that wish to disable the APICompat check they can remove the `ApiCompatVersion` property from their project. Our version bump automation will automatically add or increment the `ApiCompatVersion` property to the project when it detects that the version it is changing was a GA version which usually indicates that we just shipped that GA version and so it should be the new baseline for API checks.
 
 ### Releasing a new version of a GA'ed libary
 Since the [eng/Packages.Data.props](https://github.com/Azure/azure-sdk-for-net/blob/master/eng/Packages.Data.props) is currently maintained manually, you will need to update the version number for your library in this file when releasing a new version.

eng/ApiCompat/ApiCompat.csproj

@@ -175,15 +175,22 @@
            Text="When UseProjectReferenceToAzureClients=true all Azure.* references should be Project References, but the following are not [@(ShouldBeProjectReference)]" />
   </Target>
 
-  <Target Name="RunApiCompat" AfterTargets="CoreBuild" Condition="'$(ApiCompatVersion)' != '' and '$(DesignTimeBuild)' != 'true' and '$(SkipApiCompat)' != 'true'">
-    <MSBuild
-      Projects="$(MSBuildThisFileDirectory)/ApiCompat/ApiCompat.csproj"
-      Properties="TargetPackageName=$(PackageId);
-                  TargetPackageVersion=$(ApiCompatVersion);
-                  TargetOutputPath=$(IntermediateOutputPath);
-                  BaseIntermediateOutputPath=$(IntermediateOutputPath)\ApiCompat\"
-      Targets="ApiCompatVerification"
-     />
+  <ItemGroup Condition="'$(ApiCompatVersion)' != ''">
+    <PackageDownload Include="$(PackageId)" Version="[$(ApiCompatVersion)]" />
+    <PackageReference Include="Microsoft.DotNet.ApiCompat" />
+  </ItemGroup>
+ 
+  <Target Name="_ResolveResolvedMatchingContract" BeforeTargets="ValidateApiCompatForSrc" Condition="'$(ApiCompatVersion)' != ''">
+    <ItemGroup>
+      <_ReferencePathDirectories Include="@(ReferencePath -> '%(RootDir)%(Directory)')"  />
+      <ResolvedMatchingContract Include="$(NuGetPackageRoot)\$(PackageId.ToLower())\$(ApiCompatVersion)\lib\$(TargetFramework)\$(TargetFileName)">
+        <DependencyPaths>@(_ReferencePathDirectories->Distinct(), ',')</DependencyPaths>
+      </ResolvedMatchingContract>
+    </ItemGroup>
+  </Target>
+
+  <Target Name="ApiCompatFinishedMessage" AfterTargets="ValidateApiCompatForSrc" Condition="'$(ApiCompatVersion)' != ''">
+     <Message Text="Ran ApiCompat against %(ResolvedMatchingContract.Identity) using assemblies from $(IntermediateOutputPath)" Importance="High" />
   </Target>
 
   <Import Project="$(CentralPackageVersionPackagePath)\Sdk.targets" />

eng/ApiCompat/Directory.Build.targets

@@ -63,6 +63,7 @@
     <PackageReference Update="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="2.6.1" />
     <PackageReference Update="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.6.2" />
     <PackageReference Update="Microsoft.CodeAnalysis" Version="2.3.0" />
+    <PackageReference Update="Microsoft.DotNet.ApiCompat" Version="5.0.0-beta.19552.1" />
     <PackageReference Update="Microsoft.IdentityModel.Clients.ActiveDirectory" Version="4.5.1" />
     <PackageReference Update="Microsoft.Identity.Client" Version="4.16.1" />
     <PackageReference Update="Microsoft.Identity.Client.Extensions.Msal" Version="2.12.0" />

eng/Directory.Build.Data.targets

@@ -7,4 +7,4 @@ param (
 
 $servicesProj = Resolve-Path "$PSScriptRoot/../service.proj"
 
-dotnet build /p:GenerateApiListingOnBuild=true /p:SkipApiCompat=true /p:GeneratePackageOnBuild=false /p:Configuration=Release /p:IncludeSamples=false /p:IncludeTests=false /p:Scope="$ServiceDirectory" /restore $servicesProj
+dotnet build /p:GenerateApiListingOnBuild=true /p:RunApiCompat=false /p:GeneratePackageOnBuild=false /p:Configuration=Release /p:IncludeSamples=false /p:IncludeTests=false /p:Scope="$ServiceDirectory" /restore $servicesProj

eng/Packages.Data.props

@@ -161,8 +161,6 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Azure.ResourceManager.Stora
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DigitalTwinsClientSample", "..\..\digitaltwins\Azure.DigitalTwins.Core\samples\DigitalTwinsClientSample\DigitalTwinsClientSample.csproj", "{635AF2FC-2E5D-4335-8F8D-72F25BD61C95}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ApiCompat", "..\..\..\eng\ApiCompat\ApiCompat.csproj", "{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Azure.Analytics.Synapse.AccessControl", "..\..\synapse\Azure.Analytics.Synapse.AccessControl\src\Azure.Analytics.Synapse.AccessControl.csproj", "{3B583609-3429-4231-A690-BAB60A7CFF66}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Azure.Analytics.Synapse.AccessControl.Tests", "..\..\synapse\Azure.Analytics.Synapse.AccessControl\tests\Azure.Analytics.Synapse.AccessControl.Tests.csproj", "{8833E803-A2DD-41F1-A264-7455A085AF47}"
@@ -1226,18 +1224,6 @@ Global
 		{635AF2FC-2E5D-4335-8F8D-72F25BD61C95}.Release|x64.Build.0 = Release|Any CPU
 		{635AF2FC-2E5D-4335-8F8D-72F25BD61C95}.Release|x86.ActiveCfg = Release|Any CPU
 		{635AF2FC-2E5D-4335-8F8D-72F25BD61C95}.Release|x86.Build.0 = Release|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Debug|x64.ActiveCfg = Debug|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Debug|x64.Build.0 = Debug|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Debug|x86.ActiveCfg = Debug|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Debug|x86.Build.0 = Debug|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Release|Any CPU.Build.0 = Release|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Release|x64.ActiveCfg = Release|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Release|x64.Build.0 = Release|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Release|x86.ActiveCfg = Release|Any CPU
-		{EC964E8B-58ED-42B3-BCAA-740FFEFFF155}.Release|x86.Build.0 = Release|Any CPU
 		{3B583609-3429-4231-A690-BAB60A7CFF66}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{3B583609-3429-4231-A690-BAB60A7CFF66}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{3B583609-3429-4231-A690-BAB60A7CFF66}.Debug|x64.ActiveCfg = Debug|Any CPU

eng/scripts/Export-API.ps1

@@ -5,7 +5,6 @@
     <Version>4.0.0-beta.2</Version>
     <PackageTags>Microsoft Azure EventGrid;Event Grid;Event Grid Publishing;</PackageTags>
     <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
-    <EnableApiCompat>false</EnableApiCompat>
   </PropertyGroup>
 
   <ItemGroup>

sdk/core/Azure.Core/Azure.Core.All.sln

@@ -2,7 +2,6 @@
   <PropertyGroup>
     <AssemblyTitle>Azure IoT Hub Service Client SDK</AssemblyTitle>
     <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
-    <EnableApiCompat>false</EnableApiCompat>
   </PropertyGroup>
 
   <!-- Nuget properties -->

sdk/eventgrid/Azure.Messaging.EventGrid/src/Azure.Messaging.EventGrid.csproj

@@ -13,7 +13,6 @@
       in addition to the breaking changes https://github.com/Azure/azure-sdk-for-net/blob/master/sdk/storage/Azure.Storage.Blobs.ChangeFeed/BreakingChanges.txt
     </Description>
     <GenerateAPIListing>true</GenerateAPIListing>
-    <EnableApiCompat>false</EnableApiCompat>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="System.Text.Json" />