re add net462 (#613)

Author: SimonCropp

src/DiffEngine/DiffEngine.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT'">net472;net48;net9.0</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT'">net462;net472;net48;net9.0</TargetFrameworks>
     <TargetFrameworks>$(TargetFrameworks);net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
   </PropertyGroup>
   <ItemGroup>
@@ -12,6 +12,8 @@
     <Using Include="System.Net.Sockets" />
     <Using Include="EmptyFiles" />
     <Using Include="System.ReadOnlySpan&lt;System.Char&gt;" Alias="CharSpan" />
+    <PackageReference Include="System.Runtime.InteropServices.RuntimeInformation"
+                      Condition="'$(TargetFramework)' == 'net462' OR '$(TargetFramework)' == 'net472'" />
     <PackageReference Include="Caseless.Fody" PrivateAssets="All" />
     <PackageReference Include="EmptyFiles" PrivateAssets="None" />
     <PackageReference Include="Fody" PrivateAssets="all" />

src/DiffEngine/OsSettingsResolver.cs

@@ -27,19 +27,19 @@ public static bool Resolve(
         [NotNullWhen(true)] out string? path,
         [NotNullWhen(true)] out LaunchArguments? launchArguments)
     {
-        if (TryResolveForOs(tool, osSupport.Windows, out path, OSPlatform.Windows))
+        if (TryResolveForOs(tool, osSupport.Windows, out path, "WINDOWS"))
         {
             launchArguments = osSupport.Windows.LaunchArguments;
             return true;
         }
 
-        if (TryResolveForOs(tool, osSupport.Linux, out path, OSPlatform.Linux))
+        if (TryResolveForOs(tool, osSupport.Linux, out path, "LINUX"))
         {
             launchArguments = osSupport.Linux.LaunchArguments;
             return true;
         }
 
-        if (TryResolveForOs(tool, osSupport.Osx, out path, OSPlatform.OSX))
+        if (TryResolveForOs(tool, osSupport.Osx, out path, "OSX"))
         {
             launchArguments = osSupport.Osx.LaunchArguments;
             return true;
@@ -54,11 +54,11 @@ static bool TryResolveForOs(
         string tool,
         [NotNullWhen(true)] OsSettings? os,
         [NotNullWhen(true)] out string? path,
-        OSPlatform platform)
+        string platform)
     {
         path = null;
 
-        if (os == null || !RuntimeInformation.IsOSPlatform(platform))
+        if (os == null || !OperatingSystemPolyfill.IsOSPlatform(platform))
         {
             return false;
         }

src/Directory.Build.props

@@ -2,7 +2,7 @@
 <Project>
   <PropertyGroup>
     <NoWarn>CS1591;CS0649</NoWarn>
-    <Version>15.10.1</Version>
+    <Version>15.11.0</Version>
     <AssemblyVersion>1.0.0</AssemblyVersion>
     <PackageTags>Testing, Snapshot, Diff, Compare</PackageTags>
     <Description>Launches diff tools based on file extensions. Designed to be consumed by snapshot testing libraries.</Description>

src/Directory.Packages.props

@@ -4,9 +4,9 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="Argon" Version="0.26.0" />
+    <PackageVersion Include="Argon" Version="0.27.0" />
     <PackageVersion Include="Caseless.Fody" Version="1.9.1" />
-    <PackageVersion Include="EmptyFiles" Version="8.7.1" />
+    <PackageVersion Include="EmptyFiles" Version="8.8.0" />
     <PackageVersion Include="Fody" Version="6.9.2" />
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />