use tasks from the built assembly during packing instead of from the project asset package

Author: smdn

src/Smdn.Reflection.ReverseGenerating.ListApi.MSBuild.Tasks/Directory.Build.targets

@@ -0,0 +1,10 @@
+<!--
+SPDX-FileCopyrightText: 2022 smdn <smdn@smdn.jp>
+SPDX-License-Identifier: MIT
+-->
+<Project>
+  <ImportGroup>
+    <Import Project="$(MSBuildThisFileDirectory)..\Directory.Build.targets" />
+    <Import Project="$(MSBuildThisFileDirectory)UsingExportedTasks.targets" />
+  </ImportGroup>
+</Project>

src/Smdn.Reflection.ReverseGenerating.ListApi.MSBuild.Tasks/Smdn.Reflection.ReverseGenerating.ListApi.MSBuild.Tasks.csproj

@@ -40,6 +40,9 @@ SPDX-License-Identifier: MIT
   <ItemGroup>
     <PackageReference Include="Microsoft.Build.Utilities.Core" Version="17.0.0" PrivateAssets="All" />
     <ProjectReference VersionRange="[1.1.0,2.0.0)" Include="..\Smdn.Reflection.ReverseGenerating.ListApi.Core\Smdn.Reflection.ReverseGenerating.ListApi.Core.csproj" PrivateAssets="All" />
+
+    <!-- remove this package itself from PackageReference to avoid duplicate references during the running of 'Pack' target -->
+    <PackageReference Remove="$(PackageId)" />
   </ItemGroup>
 
   <ItemGroup Label="exporting tasks">

src/Smdn.Reflection.ReverseGenerating.ListApi.MSBuild.Tasks/UsingExportedTasks.targets

@@ -0,0 +1,18 @@
+<!--
+SPDX-FileCopyrightText: 2022 smdn <smdn@smdn.jp>
+SPDX-License-Identifier: MIT
+-->
+<Project>
+  <!-- use exported tasks from the built assembly instead of from the project asset package -->
+  <PropertyGroup>
+    <UseExportedTasksFromOutputAssembly>true</UseExportedTasksFromOutputAssembly>
+    <UsingTaskAssemblyFileConfiguration>Release</UsingTaskAssemblyFileConfiguration>
+    <UsingTaskAssemblyFileTargetFramework>net6.0</UsingTaskAssemblyFileTargetFramework>
+  </PropertyGroup>
+
+  <UsingTask
+    Condition="'$(UseExportedTasksFromOutputAssembly)' == 'true'"
+    TaskName="@(ExportTaskNames->'%(Namespace).%(Identity)', ';')"
+    AssemblyFile="$(BaseOutputPath)$(UsingTaskAssemblyFileConfiguration)\$(UsingTaskAssemblyFileTargetFramework)\$(AssemblyName).dll"
+  />
+</Project>