Don't use Required package. It lacks coverage excludes.

Author: sharpjs

Directory.Packages.props

@@ -19,11 +19,9 @@
   <ItemGroup>
     <PackageVersion Include="DependencyQueue"                             Version="1.0.0-rc.5" />
     <PackageVersion Include="DotStuff"                                    Version="0.0.0-pre.2" />
-    <PackageVersion Include="IsExternalInit"                              Version="1.0.3" />
     <PackageVersion Include="Microsoft.Data.SqlClient"                    Version="[5.2.2, 6.0.0)" />
     <PackageVersion Include="Microsoft.PowerShell.SDK"                    Version="[7.2.24, 7.3.0)" />
     <PackageVersion Include="Prequel"                                     Version="1.1.0" />
-    <PackageVersion Include="Required"                                    Version="1.0.0" />
     <PackageVersion Include="Subatomix.Build.Packaging.PowerShellModule"  Version="1.1.1" />
     <PackageVersion Include="Subatomix.Testing"                           Version="3.2.0" />
     <PackageVersion Include="System.Management.Automation"                Version="[7.2.0, 7.3.0)" />

PSql.Deploy.Engine/PSql.Deploy.Engine.csproj

@@ -16,9 +16,7 @@
 
   <ItemGroup>
     <PackageReference Include="DependencyQueue" />
-    <PackageReference Include="IsExternalInit" PrivateAssets="all" />
     <PackageReference Include="Prequel" />
-    <PackageReference Include="Required" PrivateAssets="all" />
     <PackageReference Include="Microsoft.Data.SqlClient" />
   </ItemGroup>
 

PSql.Deploy.Engine/Utilities/Polyfills.cs

@@ -0,0 +1,39 @@
+// Copyright Subatomix Research Inc.
+// SPDX-License-Identifier: MIT
+
+#if !NET7_0_OR_GREATER
+
+using System.ComponentModel;
+
+using static System.AttributeTargets;
+using static System.ComponentModel.EditorBrowsableState;
+
+namespace System.Diagnostics.CodeAnalysis
+{
+    [AttributeUsage(Constructor, AllowMultiple = false, Inherited = false)]
+    [EditorBrowsable(Never)]
+    [ExcludeFromCodeCoverage]
+    internal sealed class SetsRequiredMembersAttribute : Attribute {}
+}
+
+namespace System.Runtime.CompilerServices
+{
+    [AttributeUsage(Class | Struct | Field | Property, AllowMultiple = false, Inherited = false)]
+    [EditorBrowsable(Never)]
+    [ExcludeFromCodeCoverage]
+    internal sealed class RequiredMemberAttribute : Attribute {}
+
+    [AttributeUsage(All, AllowMultiple = true, Inherited = false)]
+    [EditorBrowsable(Never)]
+    [ExcludeFromCodeCoverage]
+    internal sealed class CompilerFeatureRequiredAttribute : Attribute
+    {
+        public CompilerFeatureRequiredAttribute(string featureName)
+            => FeatureName = featureName;
+
+        public string FeatureName { get; }
+        public bool   IsOptional  { get; init; }
+    }
+}
+
+#endif