Add strong name signing for netstandard libraries

.gitattributes

@@ -17,6 +17,7 @@
 *.yml   text
 
 *.sln   text
+*.snk   binary
 
 *.csproj   text
 *.cs       text eol=crlf

Directory.Build.props

@@ -38,12 +38,8 @@ SPDX-License-Identifier: GPL-3.0-only
     <SelfContained>false</SelfContained>
     <IsPackable>false</IsPackable>
     <IsPublishable>false</IsPublishable>
-    <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable>
-    <IsAotCompatible Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net7.0'))">true</IsAotCompatible>
     <GenerateDependencyFile>false</GenerateDependencyFile>
-    <!--
-    See https://github.com/dotnet/roslyn/issues/41640
-    -->
+    <!-- See https://github.com/dotnet/roslyn/issues/41640 -->
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PublishDocumentationFiles>false</PublishDocumentationFiles>
     <NoWarn>CS1591</NoWarn>

Directory.Build.targets

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <!--
 SPDX-FileCopyrightText: 2024 Frans van Dorsselaer
 
@@ -6,6 +6,17 @@ SPDX-License-Identifier: GPL-3.0-only
 -->
 <Project>
 
+  <PropertyGroup>
+    <!-- This is not set by default, but this is the sane default. -->
+    <IsTrimmable Condition="'$(IsTrimmable)' != 'false' And $([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable>
+    <!-- This is not set by default, but this is the sane default. -->
+    <IsAotCompatible Condition="'$(IsAotCompatible)' != 'false' And $([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net7.0'))">true</IsAotCompatible>
+    <!-- This is set to false by default, but this is a better sane default. -->
+    <!-- See: https://learn.microsoft.com/en-us/dotnet/standard/library-guidance/strong-naming#create-strong-named-net-libraries -->
+    <SignAssembly Condition="$(TargetFramework.Contains('netstandard'))">true</SignAssembly>
+    <AssemblyOriginatorKeyFile>$(MSBuildThisFileDirectory)\strongname.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+
   <Target Name="RemoveDebug" AfterTargets="Publish">
     <ItemGroup>
       <DebugFiles Include="$(PublishDir)\**\*.pdb" />

UnitTests/packages.lock.json

@@ -8,6 +8,12 @@
         "resolved": "1.1.0",
         "contentHash": "oabDrUuI3t6viTgMJPb6M6fYYHZBFkHG5QPNPJvIQayKi2LhEgIEeiyfyUKr1RQrr1imDEI4z8VOgEUndfzVnw=="
       },
+      "Microsoft.NET.ILLink.Tasks": {
+        "type": "Direct",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "zAwp213evC3UkimtVXRb+Dlgc/40QG145nmZDtp2LO9zJJMfrp+i/87BnXN7tRXEA4liyzdFkjqG1HE8/RPb4A=="
+      },
       "Microsoft.NET.Test.Sdk": {
         "type": "Direct",
         "requested": "[17.12.0, )",

strongname.snk.license

@@ -0,0 +1,3 @@
+SPDX-FileCopyrightText: 2024 Frans van Dorsselaer
+
+SPDX-License-Identifier: GPL-3.0-only