PowerShell module does not work when used with WinRM remoting

src/Directory.Packages.props

@@ -22,6 +22,7 @@
     <PackageVersion Include="Microsoft.AspNet.WebApi.OwinSelfHost" Version="5.3.0" />
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="2.1.2" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
+    <PackageVersion Include="Microsoft.Extensions.DependencyModel" Version="6.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
     <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="7.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Hosting.WindowsServices" Version="7.0.1" />

src/ServiceControl.Management.PowerShell/DependencyResolver.cs

@@ -0,0 +1,111 @@
+#nullable enable
+namespace ServiceControl.Management.PowerShell;
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using Microsoft.Extensions.DependencyModel;
+
+class DependencyResolver
+{
+    readonly string assemblyDirectory;
+    readonly DependencyContext dependencyContext;
+    readonly string?[] runtimes;
+
+    public DependencyResolver(string assemblyPath)
+    {
+        assemblyDirectory = Path.GetDirectoryName(assemblyPath) ?? string.Empty;
+
+        var depsJsonFile = Path.ChangeExtension(assemblyPath, "deps.json");
+        using var fileStream = File.OpenRead(depsJsonFile);
+
+        var reader = new DependencyContextJsonReader();
+        dependencyContext = reader.Read(fileStream);
+
+        var runtimeGraph = DependencyContext.Default?.RuntimeGraph.SingleOrDefault(r => r.Runtime.Equals(RuntimeInformation.RuntimeIdentifier, StringComparison.Ordinal));
+
+        // PowerShell is still building against OS-specific RIDs on Windows, so the expected runtime graph information isn't in the default deps.json file.
+        // Try looking it up again using the RID specified in the deps.json file instead.
+        runtimeGraph ??= DependencyContext.Default?.RuntimeGraph.SingleOrDefault(r => r.Runtime.Equals(DependencyContext.Default.Target.Runtime, StringComparison.Ordinal));
+
+        if (runtimeGraph is not null)
+        {
+            runtimes = [runtimeGraph.Runtime, .. runtimeGraph.Fallbacks, string.Empty];
+        }
+        else // Runtime graph information isn't available when running in WinRM, so assume we're running on Windows if null at this point
+        {
+            runtimes = [Environment.Is64BitProcess ? "win-x64" : "win-x86", "win", "any", "base", string.Empty];
+        }
+    }
+
+    public string? ResolveAssemblyToPath(AssemblyName assemblyName)
+    {
+        ArgumentNullException.ThrowIfNull(assemblyName);
+
+        var library = dependencyContext.RuntimeLibraries.SingleOrDefault(r => r.Name.Equals(assemblyName.Name, StringComparison.Ordinal));
+
+        if (library is null)
+        {
+            return null;
+        }
+
+        // If we had dependencies that had satellite resource assemblies, we'd need to use assemblyName.CultureName and library.ResourceAssemblies instead
+
+        return SearchRuntimeAssets(library.RuntimeAssemblyGroups);
+    }
+
+    public string? ResolveUnmanagedDllToPath(string unmanagedDllName)
+    {
+        //This logic is good enough for our purposes, but is not comprehensive enough for general, cross-platform use.
+        var nativeLibraryGroups = dependencyContext.RuntimeLibraries.SelectMany(r => r.NativeLibraryGroups);
+        var candidateGroups = nativeLibraryGroups.Where(r => r.AssetPaths[0].Contains(unmanagedDllName, StringComparison.OrdinalIgnoreCase));
+
+        return SearchRuntimeAssets(candidateGroups);
+    }
+
+    string? SearchRuntimeAssets(IEnumerable<RuntimeAssetGroup> runtimeAssets)
+    {
+        if (!runtimeAssets.Any())
+        {
+            return null;
+        }
+
+        string? assetPath = null;
+
+        foreach (var runtime in runtimes)
+        {
+            foreach (var asset in runtimeAssets)
+            {
+                if (asset.Runtime.Equals(runtime, StringComparison.Ordinal))
+                {
+                    assetPath = asset.AssetPaths[0];
+                    break;
+                }
+            }
+
+            if (assetPath is not null)
+            {
+                // This assumes that we're running with all assemblies copied locally, and doesn't attempt to cover the scenario of needing to resolve
+                // from the NuGet package cache folder.
+                if (assetPath.StartsWith("lib", StringComparison.Ordinal))
+                {
+                    assetPath = Path.GetFileName(assetPath);
+                }
+
+                assetPath = Path.GetFullPath(Path.Combine(assemblyDirectory, assetPath));
+
+                if (!File.Exists(assetPath))
+                {
+                    assetPath = null;
+                }
+
+                break;
+            }
+        }
+
+        return assetPath;
+    }
+}

src/ServiceControl.Management.PowerShell/InstallerEngineAssemblyLoadContext.cs

@@ -1,44 +1,43 @@
-namespace ServiceControl.Management.PowerShell
+namespace ServiceControl.Management.PowerShell;
+
+using System;
+using System.IO;
+using System.Reflection;
+using System.Runtime.Loader;
+
+class InstallerEngineAssemblyLoadContext : AssemblyLoadContext
 {
-    using System;
-    using System.IO;
-    using System.Reflection;
-    using System.Runtime.Loader;
+    readonly DependencyResolver resolver;
 
-    class InstallerEngineAssemblyLoadContext : AssemblyLoadContext
+    public InstallerEngineAssemblyLoadContext()
     {
-        readonly AssemblyDependencyResolver resolver;
+        var executingAssemblyDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
+        var assemblyPath = Path.Combine(executingAssemblyDirectory, "InstallerEngine", "ServiceControlInstaller.Engine.dll");
 
-        public InstallerEngineAssemblyLoadContext()
-        {
-            var executingAssemblyDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
-            var assemblyPath = Path.Combine(executingAssemblyDirectory, "InstallerEngine", "ServiceControlInstaller.Engine.dll");
+        resolver = new DependencyResolver(assemblyPath);
+    }
 
-            resolver = new AssemblyDependencyResolver(assemblyPath);
-        }
+    protected override Assembly Load(AssemblyName assemblyName)
+    {
+        var assemblyPath = resolver.ResolveAssemblyToPath(assemblyName);
 
-        protected override Assembly Load(AssemblyName assemblyName)
+        if (assemblyPath != null)
         {
-            var assemblyPath = resolver.ResolveAssemblyToPath(assemblyName);
-
-            if (assemblyPath != null)
-            {
-                return LoadFromAssemblyPath(assemblyPath);
-            }
-
-            return null;
+            return LoadFromAssemblyPath(assemblyPath);
         }
 
-        protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
-        {
-            var unmanagedDllPath = resolver.ResolveUnmanagedDllToPath(unmanagedDllName);
+        return null;
+    }
 
-            if (unmanagedDllPath != null)
-            {
-                return LoadUnmanagedDllFromPath(unmanagedDllPath);
-            }
+    protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
+    {
+        var unmanagedDllPath = resolver.ResolveUnmanagedDllToPath(unmanagedDllName);
 
-            return IntPtr.Zero;
+        if (unmanagedDllPath != null)
+        {
+            return LoadUnmanagedDllFromPath(unmanagedDllPath);
         }
+
+        return IntPtr.Zero;
     }
 }

src/ServiceControl.Management.PowerShell/ModuleAssemblyInitializer.cs

@@ -12,6 +12,16 @@ public class ModuleAssemblyInitializer : IModuleAssemblyInitializer, IModuleAsse
 
         public void OnRemove(PSModuleInfo psModuleInfo) => AssemblyLoadContext.Default.Resolving -= Resolve;
 
-        static Assembly Resolve(AssemblyLoadContext defaultLoadContext, AssemblyName assemblyName) => installerEngineLoadContext.LoadFromAssemblyName(assemblyName);
+        static Assembly Resolve(AssemblyLoadContext defaultLoadContext, AssemblyName assemblyName)
+        {
+            if (assemblyName.Name.Contains("ServiceControlInstaller.Engine"))
+            {
+                return installerEngineLoadContext.LoadFromAssemblyName(assemblyName);
+            }
+            else
+            {
+                return null;
+            }
+        }
     }
 }

src/ServiceControl.Management.PowerShell/ServiceControl.Management.PowerShell.csproj

@@ -17,6 +17,7 @@
 
     <!--Ensures that all project references are explicitly defined in this file -->
     <DisableTransitiveProjectReferences>true</DisableTransitiveProjectReferences>
+    <LangVersion>12.0</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
@@ -26,11 +27,13 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.DependencyModel" GeneratePathProperty="true" />
     <PackageReference Include="System.Management.Automation" />
   </ItemGroup>
 
   <ItemGroup>
     <Artifact Include="$(OutputPath)" DestinationFolder="$(PowerShellModuleArtifactsPath)" />
+    <Artifact Include="$(PkgMicrosoft_Extensions_DependencyModel)\lib\netstandard2.0\Microsoft.Extensions.DependencyModel.dll" DestinationFolder="$(PowerShellModuleArtifactsPath)" />
     <Artifact Include="$(PowerShellModuleName).psd1" DestinationFolder="$(PowerShellModuleArtifactsPath)" />
     <Artifact Include="$(PowerShellModuleName).psm1" DestinationFolder="$(PowerShellModuleArtifactsPath)" />
     <Artifact Include="$(PowerShellModuleName).format.ps1xml" DestinationFolder="$(PowerShellModuleArtifactsPath)" />