Add fine-grained disabling of SourceGenerators

This allows manual testing and/or alternate source generators to
provide functionality without conflict.

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ExtensionMethods.cs

@@ -26,6 +26,12 @@ namespace Godot.SourceGenerators
                toggle != null &&
                toggle.Equals("true", StringComparison.OrdinalIgnoreCase);
 
+        public static bool IsGodotSourceGeneratorDisabled(this GeneratorExecutionContext context, string generatorName) =>
+            AreGodotSourceGeneratorsDisabled(context) ||
+            (context.TryGetGlobalAnalyzerProperty("GodotDisabledSourceGenerators", out string? disabledGenerators) &&
+            disabledGenerators != null &&
+            disabledGenerators.Split(';').Contains(generatorName));
+
         public static bool InheritsFrom(this INamedTypeSymbol? symbol, string assemblyName, string typeFullName)
         {
             while (symbol != null)

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/Godot.SourceGenerators.props

@@ -1,6 +1,7 @@
 <Project>
   <ItemGroup>
     <!-- $(GodotProjectDir) is defined by Godot.NET.Sdk -->
+    <CompilerVisibleProperty Include="GodotDisabledSourceGenerators" />
     <CompilerVisibleProperty Include="GodotProjectDir" />
     <CompilerVisibleProperty Include="GodotProjectDirBase64" />
     <CompilerVisibleProperty Include="GodotSourceGenerators" />

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/GodotPluginsInitializerGenerator.cs

@@ -13,7 +13,7 @@ namespace Godot.SourceGenerators
 
         public void Execute(GeneratorExecutionContext context)
         {
-            if (context.IsGodotToolsProject())
+            if (context.IsGodotToolsProject() || context.IsGodotSourceGeneratorDisabled("GodotPluginsInitializer"))
                 return;
 
             string source =

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ScriptMethodsGenerator.cs

@@ -16,7 +16,7 @@ namespace Godot.SourceGenerators
 
         public void Execute(GeneratorExecutionContext context)
         {
-            if (context.AreGodotSourceGeneratorsDisabled())
+            if (context.IsGodotSourceGeneratorDisabled("ScriptMethods"))
                 return;
 
             INamedTypeSymbol[] godotClasses = context

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ScriptPathAttributeGenerator.cs

@@ -14,7 +14,7 @@ namespace Godot.SourceGenerators
     {
         public void Execute(GeneratorExecutionContext context)
         {
-            if (context.AreGodotSourceGeneratorsDisabled())
+            if (context.IsGodotSourceGeneratorDisabled("ScriptPathAttribute"))
                 return;
 
             if (context.IsGodotToolsProject())

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ScriptPropertiesGenerator.cs

@@ -16,7 +16,7 @@ namespace Godot.SourceGenerators
 
         public void Execute(GeneratorExecutionContext context)
         {
-            if (context.AreGodotSourceGeneratorsDisabled())
+            if (context.IsGodotSourceGeneratorDisabled("ScriptProperties"))
                 return;
 
             INamedTypeSymbol[] godotClasses = context

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ScriptPropertyDefValGenerator.cs

@@ -17,7 +17,7 @@ namespace Godot.SourceGenerators
 
         public void Execute(GeneratorExecutionContext context)
         {
-            if (context.AreGodotSourceGeneratorsDisabled())
+            if (context.IsGodotSourceGeneratorDisabled("ScriptPropertyDefVal"))
                 return;
 
             INamedTypeSymbol[] godotClasses = context

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ScriptSerializationGenerator.cs

@@ -16,7 +16,7 @@ namespace Godot.SourceGenerators
 
         public void Execute(GeneratorExecutionContext context)
         {
-            if (context.AreGodotSourceGeneratorsDisabled())
+            if (context.IsGodotSourceGeneratorDisabled("ScriptSerialization"))
                 return;
 
             INamedTypeSymbol[] godotClasses = context

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/ScriptSignalsGenerator.cs

@@ -23,7 +23,7 @@ namespace Godot.SourceGenerators
 
         public void Execute(GeneratorExecutionContext context)
         {
-            if (context.AreGodotSourceGeneratorsDisabled())
+            if (context.IsGodotSourceGeneratorDisabled("ScriptSignals"))
                 return;
 
             INamedTypeSymbol[] godotClasses = context