add nullable context to attribute

src/Speckle.ProxyGenerator/FileGenerators/ExtraFilesGenerator.cs

@@ -1,3 +1,4 @@
+using Speckle.ProxyGenerator.Extensions;
 using Speckle.ProxyGenerator.Models;
 
 namespace Speckle.ProxyGenerator.FileGenerators;
@@ -6,7 +7,7 @@ internal class ExtraFilesGenerator : IFileGenerator
 {
     private const string Name = "Speckle.ProxyGenerator.Extra.g.cs";
 
-    public FileData GenerateFile()
+    public FileData GenerateFile(bool supportsNullable)
     {
         return new FileData(
             $"{Name}",
@@ -19,6 +20,7 @@ internal class ExtraFilesGenerator : IFileGenerator
 // </auto-generated>
 //----------------------------------------------------------------------------------------
 
+{supportsNullable.IIf("#nullable enable")}
 using System;
 
 namespace Speckle.ProxyGenerator
@@ -67,6 +69,7 @@ namespace Speckle.ProxyGenerator
 
         Internal = 1
     }}
+{supportsNullable.IIf("#nullable restore")}
 }}"
         );
     }

src/Speckle.ProxyGenerator/FileGenerators/IFileGenerator.cs

@@ -4,5 +4,5 @@ namespace Speckle.ProxyGenerator.FileGenerators;
 
 internal interface IFileGenerator
 {
-    FileData GenerateFile();
+    FileData GenerateFile(bool supportsNullable);
 }

src/Speckle.ProxyGenerator/ProxyInterfaceCodeGenerator.cs

@@ -48,7 +48,7 @@ class ProxyInterfaceCodeGenerator : ISourceGenerator
             // https://github.com/reactiveui/refit/blob/main/InterfaceStubGenerator.Core/InterfaceStubGenerator.cs
             var supportsNullable = csharpParseOptions.LanguageVersion >= LanguageVersion.CSharp8;
 
-            GenerateProxyAttribute(context, receiver);
+            GenerateProxyAttribute(context, receiver, supportsNullable);
             GeneratePartialInterfaces(context, receiver, supportsNullable);
             GenerateProxyClasses(context, receiver, supportsNullable);
         }
@@ -65,7 +65,11 @@ class ProxyInterfaceCodeGenerator : ISourceGenerator
         context.AddSource("Error.g", SourceText.From(message, Encoding.UTF8));
     }
 
-    private void GenerateProxyAttribute(GeneratorExecutionContext ctx, ProxySyntaxReceiver receiver)
+    private void GenerateProxyAttribute(
+        GeneratorExecutionContext ctx,
+        ProxySyntaxReceiver receiver,
+        bool supportsNullable
+    )
     {
         var context = new Context
         {
@@ -73,7 +77,7 @@ class ProxyInterfaceCodeGenerator : ISourceGenerator
             Candidates = receiver.CandidateInterfaces
         };
 
-        var attributeData = _proxyAttributeGenerator.GenerateFile();
+        var attributeData = _proxyAttributeGenerator.GenerateFile(supportsNullable);
         context.GeneratorExecutionContext.AddSource(
             attributeData.FileName,
             SourceText.From(attributeData.Text, Encoding.UTF8)

src/Speckle.ProxyGenerator/Speckle.ProxyGenerator.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <Version>0.1.1</Version>
+        <Version>0.1.2</Version>
         <TargetFramework>netstandard2.0</TargetFramework>
         <LangVersion>Latest</LangVersion>
         <Nullable>enable</Nullable>