Generate GenerateAutomaticInterfaceAttribute

AutomaticInterface/AutomaticInterface.sln

@@ -1,67 +1,59 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.31702.278
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AutomaticInterfaceExample", "AutomaticInterfaceExample\AutomaticInterfaceExample.csproj", "{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AutomaticInterface", "AutomaticInterface\AutomaticInterface.csproj", "{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AutomaticInterfaceAttribute", "AutomaticInterfaceAttribute\AutomaticInterfaceAttribute.csproj", "{ADEA885F-9F6F-443E-945A-512223AEFC11}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Tests", "Tests\Tests.csproj", "{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}"
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{96FEC8F8-B0D8-41C9-B9C4-6D1B221D6128}"
-	ProjectSection(SolutionItems) = preProject
-		Directory.Build.targets = Directory.Build.targets
-		..\.github\workflows\action.yml = ..\.github\workflows\action.yml
-		..\README.md = ..\README.md
-	EndProjectSection
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TestNuget", "TestNuget\TestNuget.csproj", "{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		DebugGenerator|Any CPU = DebugGenerator|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.DebugGenerator|Any CPU.ActiveCfg = DebugGenerator|Any CPU
-		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.DebugGenerator|Any CPU.Build.0 = DebugGenerator|Any CPU
-		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.Release|Any CPU.Build.0 = Release|Any CPU
-		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.DebugGenerator|Any CPU.ActiveCfg = DebugGenerator|Any CPU
-		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.DebugGenerator|Any CPU.Build.0 = DebugGenerator|Any CPU
-		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.Release|Any CPU.Build.0 = Release|Any CPU
-		{ADEA885F-9F6F-443E-945A-512223AEFC11}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{ADEA885F-9F6F-443E-945A-512223AEFC11}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{ADEA885F-9F6F-443E-945A-512223AEFC11}.DebugGenerator|Any CPU.ActiveCfg = DebugGenerator|Any CPU
-		{ADEA885F-9F6F-443E-945A-512223AEFC11}.DebugGenerator|Any CPU.Build.0 = DebugGenerator|Any CPU
-		{ADEA885F-9F6F-443E-945A-512223AEFC11}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{ADEA885F-9F6F-443E-945A-512223AEFC11}.Release|Any CPU.Build.0 = Release|Any CPU
-		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.DebugGenerator|Any CPU.ActiveCfg = DebugGenerator|Any CPU
-		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.DebugGenerator|Any CPU.Build.0 = DebugGenerator|Any CPU
-		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.Release|Any CPU.Build.0 = Release|Any CPU
-		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.DebugGenerator|Any CPU.ActiveCfg = Debug|Any CPU
-		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.DebugGenerator|Any CPU.Build.0 = Debug|Any CPU
-		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {B144CF18-21D8-4CB6-9847-DDE7451543D4}
-	EndGlobalSection
-EndGlobal
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.9.34728.123
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AutomaticInterfaceExample", "AutomaticInterfaceExample\AutomaticInterfaceExample.csproj", "{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AutomaticInterface", "AutomaticInterface\AutomaticInterface.csproj", "{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Tests", "Tests\Tests.csproj", "{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{96FEC8F8-B0D8-41C9-B9C4-6D1B221D6128}"
+	ProjectSection(SolutionItems) = preProject
+		..\.github\workflows\action.yml = ..\.github\workflows\action.yml
+		Directory.Build.targets = Directory.Build.targets
+		..\README.md = ..\README.md
+	EndProjectSection
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TestNuget", "TestNuget\TestNuget.csproj", "{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		DebugGenerator|Any CPU = DebugGenerator|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.DebugGenerator|Any CPU.ActiveCfg = DebugGenerator|Any CPU
+		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.DebugGenerator|Any CPU.Build.0 = DebugGenerator|Any CPU
+		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{AFDAB373-7268-4A1B-ABAF-EA076C3B2B4C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.DebugGenerator|Any CPU.ActiveCfg = DebugGenerator|Any CPU
+		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.DebugGenerator|Any CPU.Build.0 = DebugGenerator|Any CPU
+		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{AA3F5AAE-44B7-4F33-8152-A5251B51AD79}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.DebugGenerator|Any CPU.ActiveCfg = DebugGenerator|Any CPU
+		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.DebugGenerator|Any CPU.Build.0 = DebugGenerator|Any CPU
+		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E267C5B3-44DD-4D26-A2F7-5FDF92FF28D5}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.DebugGenerator|Any CPU.ActiveCfg = Debug|Any CPU
+		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.DebugGenerator|Any CPU.Build.0 = Debug|Any CPU
+		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E7CF6623-54D8-4A40-A1B1-CE078551EFE1}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {B144CF18-21D8-4CB6-9847-DDE7451543D4}
+	EndGlobalSection
+EndGlobal

AutomaticInterface/AutomaticInterface/AutomaticInterfaceGenerator.cs

@@ -1,8 +1,10 @@
 using System;
 using System.Collections.Immutable;
+using System.Text;
 using System.Threading;
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Text;
 
 namespace AutomaticInterface;
 
@@ -13,6 +15,32 @@ public class AutomaticInterfaceGenerator : IIncrementalGenerator
 
     public void Initialize(IncrementalGeneratorInitializationContext context)
     {
+        context.RegisterPostInitializationOutput(static postInitializationContext =>
+        {
+            postInitializationContext.AddSource(
+                $"{DefaultAttributeName}.Attribute.g.cs",
+                SourceText.From(
+                    $$$"""
+                    // <auto-generated />
+                    using System;
+
+                    namespace AutomaticInterface
+                    {
+                        /// <summary>
+                        /// Use source generator to automatically create a Interface from this class
+                        /// </summary>
+                        [AttributeUsage(AttributeTargets.Class)]
+                        internal sealed class {{{DefaultAttributeName}}}Attribute : Attribute
+                        {
+                            internal {{{DefaultAttributeName}}}Attribute(string namespaceName = "") { }
+                        }
+                    }
+                    """,
+                    Encoding.UTF8
+                )
+            );
+        });
+
         var classes = context
             .SyntaxProvider.CreateSyntaxProvider(CouldBeClassWithInterfaceAttribute, Transform)
             .Where(type => type is not null)

AutomaticInterface/AutomaticInterfaceExample/AutomaticInterfaceExample.csproj

@@ -12,7 +12,6 @@
     </PropertyGroup>
 
 	<ItemGroup>
-		<ProjectReference Include="..\AutomaticInterfaceAttribute\AutomaticInterfaceAttribute.csproj" />
 		<ProjectReference Include="..\AutomaticInterface\AutomaticInterface.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
 	</ItemGroup>
 

AutomaticInterface/AutomaticInterfaceExample/DemoClass.cs

@@ -1,6 +1,6 @@
 using System;
 using System.Threading.Tasks;
-using AutomaticInterfaceAttribute;
+using AutomaticInterface;
 
 namespace AutomaticInterfaceExample
 {
@@ -18,9 +18,9 @@
         /// <summary>
         /// Property Documentation will be copied
         /// </summary>
         public string Hello { get; set; } // included, get and set are copied to the interface when public
 
         public string OnlyGet { get; } // included, get and set are copied to the interface when public
 
         public string? NullableProperty { get; set; }
 
@@ -48,7 +48,7 @@
 
         public Task<string?> ASync(string x, string y)
         {
             return Task.FromResult("");
         }
 
         public static string StaticProperty => "abc"; // static property, ignored
@@ -62,18 +62,18 @@
         /// event Documentation will be copied
         /// </summary>
 #pragma warning disable S3264 // Events should be invoked
         public event EventHandler ShapeChanged; // included
 #pragma warning restore S3264 // Events should be invoked
 
 #pragma warning disable S3264 // Events should be invoked
 #pragma warning disable IDE0051 // Remove unused private members
         private event EventHandler ShapeChanged2; // ignored because not public
 #pragma warning restore IDE0051 // Remove unused private members
 #pragma warning restore S3264 // Events should be invoked
 
         public event EventHandler? ShapeChangedNullable; // included
 
         public event EventHandler<string?> ShapeChangedNullable2; // included
 
         private readonly int[] arr = new int[100];
 

AutomaticInterface/AutomaticInterfaceExample/DemoClassWithCustomNamespace.cs

@@ -1,5 +1,5 @@
 using System;
-using AutomaticInterfaceAttribute;
+using AutomaticInterface;
 using CustomNamespace;
 
 namespace AutomaticInterfaceExample

AutomaticInterface/AutomaticInterfaceExample/InterfaceExample.cs

@@ -1,7 +1,7 @@
 #nullable enable
 using System;
 using System.CodeDom.Compiler;
-using AutomaticInterfaceAttribute;
+using AutomaticInterface;
 
 namespace AutomaticInterfaceExample
 {

AutomaticInterface/TestNuget/RemoveThisOnNextVersionAttribute.cs

@@ -0,0 +1,14 @@
+using System;
+
+namespace AutomaticInterface
+{
+    /// <summary>
+    /// Use source generator to automatically create a Interface from this class
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class)]
+    [Obsolete("This attribute is obsolete. Use generated attribute instead.", false)]
+    internal sealed class GenerateAutomaticInterfaceAttribute : Attribute
+    {
+        internal GenerateAutomaticInterfaceAttribute(string namespaceName = "") { }
+    }
+}

AutomaticInterface/TestNuget/Test.cs

@@ -1,8 +1,8 @@
-using AutomaticInterfaceAttribute;
+using AutomaticInterface;
 
 namespace TestNuget
 {
     [GenerateAutomaticInterface]
     public class Test : ITest
     {
         public string GetString()

AutomaticInterface/TestNuget/TestNuget.csproj

@@ -12,8 +12,4 @@
     </PackageReference>
   </ItemGroup>
 
-  <ItemGroup>
-    <ProjectReference Include="..\AutomaticInterfaceAttribute\AutomaticInterfaceAttribute.csproj" />
-  </ItemGroup>
-
 </Project>

AutomaticInterface/Tests/GeneratorTests.cs

@@ -1901,17 +1901,11 @@ public void CustomNameSpace()
     {
         const string code = """
 
-            using AutomaticInterfaceAttribute;
+            using AutomaticInterface;
             using System;
 
             namespace AutomaticInterfaceExample
             {
-                [AttributeUsage(AttributeTargets.Class)]
-                public class GenerateAutomaticInterfaceAttribute : Attribute
-                {
-                    public GenerateAutomaticInterfaceAttribute(string namespaceName = "") { }
-                }
-
                 /// <summary>
                 /// Bla bla
                 /// </summary>
@@ -1946,7 +1940,7 @@ class DemoClass
 
             #nullable enable
             using System.CodeDom.Compiler;
-            using AutomaticInterfaceAttribute;
+            using AutomaticInterface;
             using System;
 
             namespace CustomNameSpace

AutomaticInterface/Tests/Tests.csproj

@@ -20,7 +20,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\AutomaticInterfaceAttribute\AutomaticInterfaceAttribute.csproj" />
     <ProjectReference Include="..\AutomaticInterface\AutomaticInterface.csproj" />
   </ItemGroup>
 </Project>

README.md

@@ -12,7 +12,7 @@ This interface will be generated on each subsequent build, eliminating the the f
 ## Example
 
 ```c#
-using AutomaticInterfaceAttribute;
+using AutomaticInterface;
 using System;
 
 namespace AutomaticInterfaceExample
@@ -85,7 +85,7 @@ This will create this interface:
 ```C#
 #nullable enable
 using System.CodeDom.Compiler;
-using AutomaticInterfaceAttribute;
+using AutomaticInterface;
 using System;
 
 /// <summary>
@@ -126,9 +126,8 @@ namespace AutomaticInterfaceExample
 ## How to use it?
 
 1. Install the nuget: `dotnet add package AutomaticInterface`
-2. Create an Attribute with the Name `[GenerateAutomaticInterface]`. You can just copy the minimal code from this Repo (see the `AutomaticInterfaceAttribute` project). It's the easiest way to get that attribute because you cannot reference any code from the analyzer package.
-3. Let your class implement the interface, e.g. `SomeClass: ISomeClass`
-4. Build Solution, the Interface should now be available.
+2. Let your class implement the interface, e.g. `SomeClass: ISomeClass`
+3. Build Solution, the Interface should now be available.
 
 Any errors? Ping me at: [email protected]