Attribute parsing for metadata version >= 29

.github/workflows/release.yml

@@ -27,11 +27,11 @@ jobs:
           dotnet-version: '8.0.x'
 
       - name: Build protodec
-        run:  dotnet publish --configuration Release --runtime ${{ matrix.runtime }} /p:VersionPrefix=${{ github.ref_name }} /p:ContinuousIntegrationBuild=true
+        run:  dotnet publish --configuration Release --runtime ${{ matrix.runtime }} /p:Version=${{ github.ref_name }} /p:ContinuousIntegrationBuild=true
 
       - name: Pack LibProtodec
         if:   matrix.os == 'ubuntu-latest'
-        run:  dotnet pack --configuration Release /p:VersionPrefix=${{ github.ref_name }} /p:ContinuousIntegrationBuild=true
+        run:  dotnet pack --configuration Release /p:Version=${{ github.ref_name }} /p:ContinuousIntegrationBuild=true
 
       - name: Release
         uses: softprops/action-gh-release@v1

README.md

@@ -16,6 +16,7 @@ Arguments:
   unity_version         The version of Unity which was used to create the metadata file or alternatively, the path to the globalgamemanagers or the data.unity3d file.
   out_path              An existing directory to output into individual files, otherwise output to a single file.
 Options:
+  --debug                                                     Drops the minimum log level to Debug.
   --parse_service_servers                                     Parses gRPC service definitions from server classes.
   --parse_service_clients                                     Parses gRPC service definitions from client classes.
   --skip_enums                                                Skip parsing enums and replace references to them with int32.

src/LibProtodec/LibProtodec.csproj

@@ -19,8 +19,9 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\..\Cpp2IL\LibCpp2IL\LibCpp2IL.csproj" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="9.0.0-preview.5.24306.7" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
-    <PackageReference Include="System.Reflection.MetadataLoadContext" Version="8.0.0" />
+    <PackageReference Include="System.Reflection.MetadataLoadContext" Version="9.0.0-preview.5.24306.7" />
     <PackageReference Include="Xpl0itR.SystemEx" Version="1.2.0" />
   </ItemGroup>
 

src/LibProtodec/Loaders/CilAssemblyLoader.cs

@@ -0,0 +1,34 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using System.Collections.Generic;
+using LibProtodec.Models.Cil;
+
+namespace LibProtodec.Loaders;
+
+public abstract class CilAssemblyLoader : IDisposable
+{
+    private ICilType? _iMessage;
+    private ICilType? _clientBase;
+    private ICilType? _bindServiceMethodAttribute;
+
+    // ReSharper disable once InconsistentNaming
+    public ICilType IMessage =>
+        _iMessage ??= FindType("Google.Protobuf.IMessage", "Google.Protobuf");
+
+    public ICilType ClientBase =>
+        _clientBase ??= FindType("Grpc.Core.ClientBase", "Grpc.Core.Api");
+
+    public ICilType BindServiceMethodAttribute =>
+        _bindServiceMethodAttribute ??= FindType("Grpc.Core.BindServiceMethodAttribute", "Grpc.Core.Api");
+
+    public IReadOnlyList<ICilType> LoadedTypes { get; protected init; }
+
+    public virtual void Dispose() { }
+
+    protected abstract ICilType FindType(string typeFullName, string assemblySimpleName);
+}

src/LibProtodec/Loaders/ClrAssemblyLoader.cs

@@ -12,14 +12,15 @@ using System.Reflection;
 using CommunityToolkit.Diagnostics;
 using LibProtodec.Models.Cil;
 using LibProtodec.Models.Cil.Clr;
+using Microsoft.Extensions.Logging;
 
 namespace LibProtodec.Loaders;
 
-public sealed class ClrAssemblyLoader : ICilAssemblyLoader
+public sealed class ClrAssemblyLoader : CilAssemblyLoader
 {
     public readonly MetadataLoadContext LoadContext;
 
-    public ClrAssemblyLoader(string assemblyPath)
+    public ClrAssemblyLoader(string assemblyPath, ILogger? logger = null)
     {
         bool isFile = File.Exists(assemblyPath);
         string assemblyDir = isFile
@@ -28,67 +29,33 @@ public sealed class ClrAssemblyLoader : ICilAssemblyLoader
 
         PermissiveAssemblyResolver assemblyResolver = new(
             Directory.EnumerateFiles(assemblyDir, searchPattern: "*.dll"));
-
         LoadContext = new MetadataLoadContext(assemblyResolver);
-        LoadedTypes = isFile
+        
-            ? LoadContext.LoadFromAssemblyPath(assemblyPath)
+        IEnumerable<Type> allTypes = isFile
-                         .GetTypes()
+            ? LoadContext.LoadFromAssemblyPath(assemblyPath).GetTypes()
-                         .Select(ClrType.GetOrCreate)
-                         .ToList()
             : assemblyResolver.AssemblyPathLookup.Values
-                              .SelectMany(path => LoadContext.LoadFromAssemblyPath(path).GetTypes())
+                              .SelectMany(path => LoadContext.LoadFromAssemblyPath(path).GetTypes());
+
+        this.LoadedTypes = allTypes.Where(static type => type.GenericTypeArguments.Length == 0)
                                    .Select(ClrType.GetOrCreate)
                                    .ToList();
+
+        logger?.LogLoadedTypeAndAssemblyCount(this.LoadedTypes.Count, LoadContext.GetAssemblies().Count());
     }
 
-    public IReadOnlyList<ICilType> LoadedTypes { get; }
+    protected override ICilType FindType(string typeFullName, string assemblySimpleName)
-
-    public ICilType IMessage
     {
-        get
+        ICilType? type = this.LoadedTypes.SingleOrDefault(type => type?.FullName == typeFullName, null);
-        {
+        if (type is not null)
-            ICilType? iMessage = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Google.Protobuf.IMessage", null);
+            return type;
-            if (iMessage is not null)
-                return iMessage;
 
-            Type? iMessageType = LoadContext.LoadFromAssemblyName("Google.Protobuf").GetType("Google.Protobuf.IMessage");
+        Type? clrType = LoadContext.LoadFromAssemblyName(assemblySimpleName).GetType(typeFullName);
-            Guard.IsNotNull(iMessageType);
+        Guard.IsNotNull(clrType);
 
-            return ClrType.GetOrCreate(iMessageType);
+        return ClrType.GetOrCreate(clrType);
-        }
     }
 
-    public ICilType ClientBase
+    public override void Dispose() =>
-    {
-        get
-        {
-            ICilType? clientBase = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Grpc.Core.ClientBase", null);
-            if (clientBase is not null)
-                return clientBase;
-
-            Type? clientBaseType = LoadContext.LoadFromAssemblyName("Grpc.Core.Api").GetType("Grpc.Core.ClientBase");
-            Guard.IsNotNull(clientBaseType);
-
-            return ClrType.GetOrCreate(clientBaseType);
-        }
-    }
-
-    public ICilType BindServiceMethodAttribute
-    {
-        get
-        {
-            ICilType? attribute = LoadedTypes.SingleOrDefault(static type => type?.FullName == "Grpc.Core.BindServiceMethodAttribute", null);
-            if (attribute is not null)
-                return attribute;
-
-            Type? attributeType = LoadContext.LoadFromAssemblyName("Grpc.Core.Api").GetType("Grpc.Core.BindServiceMethodAttribute");
-            Guard.IsNotNull(attributeType);
-
-            return ClrType.GetOrCreate(attributeType);
-        }
-    }
-
-    public void Dispose() =>
         LoadContext.Dispose();
 
     /// <summary>

src/LibProtodec/Loaders/ICilAssemblyLoader.cs

@@ -1,23 +0,0 @@
-// Copyright © 2024 Xpl0itR
-// 
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this
-// file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-using System;
-using System.Collections.Generic;
-using LibProtodec.Models.Cil;
-
-namespace LibProtodec.Loaders;
-
-public interface ICilAssemblyLoader : IDisposable
-{
-    IReadOnlyList<ICilType> LoadedTypes { get; }
-
-    // ReSharper disable once InconsistentNaming
-    ICilType IMessage { get; }
-
-    ICilType ClientBase { get; }
-
-    ICilType BindServiceMethodAttribute { get; }
-}

src/LibProtodec/Loaders/Il2CppAssemblyLoader.cs

@@ -4,7 +4,6 @@
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-using System.Collections.Generic;
 using System.Linq;
 using AssetRipper.Primitives;
 using CommunityToolkit.Diagnostics;
@@ -13,54 +12,27 @@ using LibCpp2IL.Metadata;
 using LibCpp2IL.Reflection;
 using LibProtodec.Models.Cil;
 using LibProtodec.Models.Cil.Il2Cpp;
+using Microsoft.Extensions.Logging;
 
 namespace LibProtodec.Loaders;
 
-public sealed class Il2CppAssemblyLoader : ICilAssemblyLoader
+public sealed class Il2CppAssemblyLoader : CilAssemblyLoader
 {
-    public Il2CppAssemblyLoader(string assemblyPath, string metadataPath, UnityVersion unityVersion)
+    public Il2CppAssemblyLoader(string assemblyPath, string metadataPath, UnityVersion unityVersion, ILogger logger)
     {
         if (!LibCpp2IlMain.LoadFromFile(assemblyPath, metadataPath, unityVersion))
             ThrowHelper.ThrowInvalidDataException("Failed to load il2cpp assembly!");
 
-        LoadedTypes = LibCpp2IlMain.TheMetadata!.typeDefs.Select(Il2CppType.GetOrCreate).ToList();
+        this.LoadedTypes = LibCpp2IlMain.TheMetadata!.typeDefs.Select(Il2CppType.GetOrCreate).ToList();
+
+        logger?.LogLoadedTypeAndAssemblyCount(this.LoadedTypes.Count, LibCpp2IlMain.TheMetadata.imageDefinitions.Length);
     }
 
-    public IReadOnlyList<ICilType> LoadedTypes { get; }
+    protected override ICilType FindType(string typeFullName, string assemblySimpleName)
-
-    public ICilType IMessage
     {
-        get
+        Il2CppTypeDefinition? type = LibCpp2IlReflection.GetTypeByFullName(typeFullName);
-        {
+        Guard.IsNotNull(type);
-            Il2CppTypeDefinition? iMessage = LibCpp2IlReflection.GetTypeByFullName("Google.Protobuf.IMessage");
-            Guard.IsNotNull(iMessage);
 
-            return Il2CppType.GetOrCreate(iMessage);
+        return Il2CppType.GetOrCreate(type);
     }
-    }
-
-    public ICilType ClientBase
-    {
-        get
-        {
-            Il2CppTypeDefinition? clientBase = LibCpp2IlReflection.GetTypeByFullName("Grpc.Core.ClientBase");
-            Guard.IsNotNull(clientBase);
-
-            return Il2CppType.GetOrCreate(clientBase);
-        }
-    }
-
-    public ICilType BindServiceMethodAttribute
-    {
-        get
-        {
-            Il2CppTypeDefinition? attribute = LibCpp2IlReflection.GetTypeByFullName("Grpc.Core.BindServiceMethodAttribute");
-            Guard.IsNotNull(attribute);
-
-            return Il2CppType.GetOrCreate(attribute);
-        }
-    }
-
-    public void Dispose() =>
-        LibCpp2IlMain.Reset();
 }

src/LibProtodec/LoggerMessages.cs

@@ -0,0 +1,86 @@
+// Copyright © 2024 Xpl0itR
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+using System;
+using Microsoft.Extensions.Logging;
+
+namespace LibProtodec;
+
+// ReSharper disable InconsistentNaming, StringLiteralTypo
+internal static partial class LoggerMessages
+{
+    [LoggerMessage(Level = LogLevel.Warning, Message = "Failed to locate corresponding id field; likely stripped or otherwise obfuscated.")]
+    internal static partial void LogFailedToLocateIdField(this ILogger logger);
+
+    [LoggerMessage(Level = LogLevel.Information, Message = "Loaded {typeCount} types from {assemblyCount} assemblies for parsing.")]
+    internal static partial void LogLoadedTypeAndAssemblyCount(this ILogger logger, int typeCount, int assemblyCount);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Parsed as enum \"{name}\".")]
+    internal static partial void LogParsedEnum(this ILogger logger, string name);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Parsed as field \"{name}\" with id \"{id}\".")]
+    internal static partial void LogParsedField(this ILogger logger, string name, int id);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Parsed as field \"{name}\" with id \"{id}\" of type \"{typeName}\".")]
+    internal static partial void LogParsedField(this ILogger logger, string name, int id, string typeName);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Parsed as message \"{name}\".")]
+    internal static partial void LogParsedMessage(this ILogger logger, string name);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Parsed as method \"{name}\" with request type \"{reqType}\" and response type \"{resType}\".")]
+    internal static partial void LogParsedMethod(this ILogger logger, string name, string reqType, string resType);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Parsed as oneof field \"{name}\".")]
+    internal static partial void LogParsedOneOfField(this ILogger logger, string name);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Parsed as service \"{name}\".")]
+    internal static partial void LogParsedService(this ILogger logger, string name);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Skipping duplicate method.")]
+    internal static partial void LogSkippingDuplicateMethod(this ILogger logger);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Skipping property without required NonUserCodeAttribute.")]
+    internal static partial void LogSkippingPropertyWithoutNonUserCodeAttribute(this ILogger logger);
+
+    [LoggerMessage(Level = LogLevel.Debug, Message = "Skipping method without required GeneratedCodeAttribute.")]
+    internal static partial void LogSkippingMethodWithoutGeneratedCodeAttribute(this ILogger logger);
+
+    internal static IDisposable? BeginScopeParsingEnum(this ILogger logger, string typeName) =>
+        __BeginScopeParsingEnumCallback(logger, typeName);
+
+    internal static IDisposable? BeginScopeParsingField(this ILogger logger, string name) =>
+        __BeginScopeParsingFieldCallback(logger, name);
+
+    internal static IDisposable? BeginScopeParsingMessage(this ILogger logger, string name) =>
+        __BeginScopeParsingMessageCallback(logger, name);
+
+    internal static IDisposable? BeginScopeParsingMethod(this ILogger logger, string name) =>
+        __BeginScopeParsingMethodCallback(logger, name);
+
+    internal static IDisposable? BeginScopeParsingProperty(this ILogger logger, string name, string typeName) =>
+        __BeginScopeParsingPropertyCallback(logger, name, typeName);
+
+    internal static IDisposable? BeginScopeParsingService(this ILogger logger, string typeName) =>
+        __BeginScopeParsingServiceCallback(logger, typeName);
+
+    private static readonly Func<ILogger, string, IDisposable?> __BeginScopeParsingEnumCallback =
+        LoggerMessage.DefineScope<string>("Parsing enum from type \"{typeName}\"");
+
+    private static readonly Func<ILogger, string, IDisposable?> __BeginScopeParsingFieldCallback =
+        LoggerMessage.DefineScope<string>("Parsing field \"{name}\"");
+
+    private static readonly Func<ILogger, string, IDisposable?> __BeginScopeParsingMessageCallback =
+        LoggerMessage.DefineScope<string>("Parsing message from type \"{name}\"");
+
+    private static readonly Func<ILogger, string, IDisposable?> __BeginScopeParsingMethodCallback =
+        LoggerMessage.DefineScope<string>("Parsing method \"{name}\"");
+
+    private static readonly Func<ILogger, string, string, IDisposable?> __BeginScopeParsingPropertyCallback =
+        LoggerMessage.DefineScope<string, string>("Parsing property \"{name}\" of type \"{typeName}\"");
+
+    private static readonly Func<ILogger, string, IDisposable?> __BeginScopeParsingServiceCallback =
+        LoggerMessage.DefineScope<string>("Parsing service from type \"{typeName}\"");
+}

src/LibProtodec/Models/Cil/Clr/ClrAttribute.cs

@@ -12,10 +12,12 @@ namespace LibProtodec.Models.Cil.Clr;
 
 public sealed class ClrAttribute(CustomAttributeData clrAttribute) : ICilAttribute
 {
+    private ICilType?  _type;
     private object?[]? _constructorArgumentValues;
 
     public ICilType Type =>
-        ClrType.GetOrCreate(clrAttribute.AttributeType);
+        _type ??= ClrType.GetOrCreate(
+            clrAttribute.AttributeType);
 
     public IList<object?> ConstructorArgumentValues
     {

src/LibProtodec/Models/Cil/Clr/ClrMethod.cs

@@ -11,6 +11,9 @@ namespace LibProtodec.Models.Cil.Clr;
 
 public sealed class ClrMethod(MethodInfo clrMethod) : ClrMember(clrMethod), ICilMethod
 {
+    public bool IsConstructor =>
+        clrMethod.IsConstructor;
+
     public bool IsPublic =>
         clrMethod.IsPublic;
 
@@ -21,7 +24,8 @@ public sealed class ClrMethod(MethodInfo clrMethod) : ClrMember(clrMethod), ICil
         clrMethod.IsVirtual;
 
     public ICilType ReturnType =>
-        ClrType.GetOrCreate(clrMethod.ReturnType);
+        ClrType.GetOrCreate(
+            clrMethod.ReturnType);
 
     public IEnumerable<ICilType> GetParameterTypes()
     {

src/LibProtodec/Models/Cil/Clr/ClrProperty.cs

@@ -10,23 +10,29 @@ namespace LibProtodec.Models.Cil.Clr;
 
 public sealed class ClrProperty(PropertyInfo clrProperty) : ClrMember(clrProperty), ICilProperty
 {
+    private readonly MethodInfo? _getterInfo = clrProperty.GetMethod;
+    private readonly MethodInfo? _setterInfo = clrProperty.SetMethod;
+
+    private ClrMethod? _getter;
+    private ClrMethod? _setter;
+
+    public bool CanRead =>
+        _getterInfo is not null;
+
+    public bool CanWrite =>
+        _setterInfo is not null;
+
+    public ICilMethod? Getter =>
+        _getterInfo is null
+            ? null
+            : _getter ??= new ClrMethod(_getterInfo);
+
+    public ICilMethod? Setter =>
+        _setterInfo is null
+            ? null
+            : _setter ??= new ClrMethod(_setterInfo);
+
     public ICilType Type =>
         ClrType.GetOrCreate(
             clrProperty.PropertyType);
-
-    public bool CanRead =>
-        clrProperty.CanRead;
-
-    public bool CanWrite =>
-        clrProperty.CanWrite;
-
-    public ICilMethod? Getter =>
-        CanRead
-            ? new ClrMethod(clrProperty.GetMethod!)
-            : null;
-
-    public ICilMethod? Setter =>
-        CanWrite
-            ? new ClrMethod(clrProperty.SetMethod!)
-            : null;
 }

src/LibProtodec/Models/Cil/Clr/ClrType.cs

@@ -29,14 +29,13 @@ public sealed class ClrType : ClrMember, ICilType
         _clrType.Namespace;
 
     public string DeclaringAssemblyName =>
-        _clrType.Assembly.FullName
+        _clrType.Assembly.FullName!;
-     ?? ThrowHelper.ThrowArgumentNullException<string>(
-            nameof(_clrType.Assembly.FullName));
 
     public ICilType? BaseType =>
         _clrType.BaseType is null
             ? null
-            : GetOrCreate(_clrType.BaseType);
+            : GetOrCreate(
+                _clrType.BaseType);
 
     public bool IsAbstract =>
         _clrType.IsAbstract;

src/LibProtodec/Models/Cil/ICilMethod.cs

@@ -12,6 +12,7 @@ public interface ICilMethod
 {
     string Name { get; }
 
+    bool IsConstructor { get; }
     bool IsInherited   { get; }
     bool IsPublic      { get; }
     bool IsStatic      { get; }

src/LibProtodec/Models/Cil/Il2Cpp/Il2CppMethod.cs

@@ -20,6 +20,9 @@ public sealed class Il2CppMethod(Il2CppMethodDefinition il2CppMethod) : Il2CppMe
     public bool IsInherited =>
         false;
 
+    public bool IsConstructor =>
+        false;
+
     public bool IsPublic =>
         (il2CppMethod.Attributes & MethodAttributes.Public) != 0;
 

src/LibProtodec/Models/Protobuf/Fields/MessageField.cs

@@ -10,7 +10,7 @@ using LibProtodec.Models.Protobuf.Types;
 
 namespace LibProtodec.Models.Protobuf.Fields;
 
-public sealed class MessageField
+public sealed class MessageField(Message declaringMessage)
 {
     public required IProtobufType Type { get; init; }
     public required string        Name { get; init; }
@@ -19,14 +19,15 @@ public sealed class MessageField
     public bool IsObsolete { get; init; }
     public bool HasHasProp { get; init; }
 
-    public void WriteTo(TextWriter writer, TopLevel topLevel, bool isOneOf)
+    public void WriteTo(TextWriter writer, bool isOneOf)
     {
         if (HasHasProp && !isOneOf && Type is not Repeated)
         {
             writer.Write("optional ");
         }
 
-        Protobuf.WriteTypeNameTo(writer, Type, topLevel);
+        writer.Write(
+            declaringMessage.QualifyTypeName(Type));
         writer.Write(' ');
         writer.Write(Name);
         writer.Write(" = ");

src/LibProtodec/Models/Protobuf/Fields/ServiceMethod.cs

@@ -10,7 +10,7 @@ using LibProtodec.Models.Protobuf.Types;
 
 namespace LibProtodec.Models.Protobuf.Fields;
 
-public sealed class ServiceMethod
+public sealed class ServiceMethod(Service declaringService)
 {
     public required string        Name         { get; init; }
     public required IProtobufType RequestType  { get; init; }
@@ -20,7 +20,7 @@ public sealed class ServiceMethod
     public bool IsResponseStreamed { get; init; }
     public bool IsObsolete         { get; init; }
 
-    public void WriteTo(IndentedTextWriter writer, TopLevel topLevel)
+    public void WriteTo(IndentedTextWriter writer)
     {
         writer.Write("rpc ");
         writer.Write(Name);
@@ -31,7 +31,8 @@ public sealed class ServiceMethod
             writer.Write("stream ");
         }
 
-        Protobuf.WriteTypeNameTo(writer, RequestType, topLevel);
+        writer.Write(
+            declaringService.QualifyTypeName(RequestType));
         writer.Write(") returns (");
 
         if (IsResponseStreamed)
@@ -39,7 +40,8 @@ public sealed class ServiceMethod
             writer.Write("stream ");
         }
 
-        Protobuf.WriteTypeNameTo(writer, ResponseType, topLevel);
+        writer.Write(
+            declaringService.QualifyTypeName(ResponseType));
         writer.Write(')');
 
         if (IsObsolete)

src/LibProtodec/Models/Protobuf/Protobuf.cs

@@ -9,15 +9,13 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using LibProtodec.Models.Protobuf.TopLevels;
-using LibProtodec.Models.Protobuf.Types;
 
 namespace LibProtodec.Models.Protobuf;
 
 public sealed class Protobuf
 {
+    private string? _fileName;
     private HashSet<string>? _imports;
-    public  HashSet<string> Imports =>
-        _imports ??= [];
 
     public readonly List<TopLevel> TopLevels = [];
 
@@ -26,7 +24,10 @@ public sealed class Protobuf
     public string? Namespace    { get; init; }
 
     public string FileName =>
-        $"{TopLevels.FirstOrDefault()?.Name}.proto";
+        _fileName ??= $"{string.Join('_', TopLevels.Select(static topLevel => topLevel.Name))}.proto";
+
+    public HashSet<string> Imports =>
+        _imports ??= [];
 
     public void WriteTo(IndentedTextWriter writer)
     {
@@ -89,17 +90,4 @@ public sealed class Protobuf
 
         writer.WriteLine(';');
     }
-
-    public static void WriteTypeNameTo(TextWriter writer, IProtobufType type, TopLevel topLevel)
-    {
-        if (type is TopLevel { Parent: not null } typeTopLevel && typeTopLevel.Parent != topLevel)
-        {
-            writer.Write(
-                typeTopLevel.QualifyName(topLevel));
-        }
-        else
-        {
-            writer.Write(type.Name);
-        }
-    }
 }

src/LibProtodec/Models/Protobuf/TopLevels/Enum.cs

@@ -23,7 +23,7 @@ public sealed class Enum : TopLevel, INestableType
         writer.WriteLine(" {");
         writer.Indent++;
 
-        if (ContainsDuplicateField)
+        if (ContainsDuplicateFieldId)
         {
             Protobuf.WriteOptionTo(writer, "allow_alias", "true");
         }
@@ -49,7 +49,7 @@ public sealed class Enum : TopLevel, INestableType
 
     public bool IsClosed { get; set; }
 
-    private bool ContainsDuplicateField
+    private bool ContainsDuplicateFieldId
     {
         get
         {

src/LibProtodec/Models/Protobuf/TopLevels/Message.cs

@@ -37,7 +37,7 @@ public sealed class Message : TopLevel, INestableType
             if (oneOfs.Contains(field.Id))
                 continue;
 
-            field.WriteTo(writer, this, isOneOf: false);
+            field.WriteTo(writer, isOneOf: false);
         }
 
         foreach ((string name, List<int> fieldIds) in OneOfs)
@@ -50,7 +50,7 @@ public sealed class Message : TopLevel, INestableType
 
             foreach (int fieldId in fieldIds)
             {
-                Fields[fieldId].WriteTo(writer, this, isOneOf: true);
+                Fields[fieldId].WriteTo(writer, isOneOf: true);
             }
 
             writer.Indent--;

src/LibProtodec/Models/Protobuf/TopLevels/Service.cs

@@ -28,7 +28,7 @@ public sealed class Service : TopLevel
 
         foreach (ServiceMethod method in Methods)
         {
-            method.WriteTo(writer, this);
+            method.WriteTo(writer);
         }
 
         writer.Indent--;

src/LibProtodec/Models/Protobuf/TopLevels/TopLevel.cs

@@ -6,22 +6,28 @@
 
 using System.CodeDom.Compiler;
 using System.Collections.Generic;
+using LibProtodec.Models.Protobuf.Types;
 
 namespace LibProtodec.Models.Protobuf.TopLevels;
 
 public abstract class TopLevel
 {
     public required string Name { get; init; }
+
     public bool      IsObsolete { get; init; }
     public Protobuf? Protobuf   { get; set;  }
     public TopLevel? Parent     { get; set;  }
 
-    public string QualifyName(TopLevel topLevel)
+    public string QualifyTypeName(IProtobufType type)
     {
-        List<string> names = [Name];
+        if (type is not TopLevel { Parent: not null } typeTopLevel
+         || typeTopLevel.Parent == this)
+            return type.Name;
 
-        TopLevel? parent = Parent;
+        List<string> names = [typeTopLevel.Name];
-        while (parent is not null && parent != topLevel)
+
+        TopLevel? parent = typeTopLevel.Parent;
+        while (parent is not null && parent != this)
         {
             names.Add(parent.Name);
             parent = parent.Parent;

src/LibProtodec/ProtodecContext.cs

@@ -18,22 +18,22 @@ using LibProtodec.Models.Protobuf;
 using LibProtodec.Models.Protobuf.Fields;
 using LibProtodec.Models.Protobuf.TopLevels;
 using LibProtodec.Models.Protobuf.Types;
+using Microsoft.Extensions.Logging;
 
 namespace LibProtodec;
 
-public delegate bool TypeLookupFunc(ICilType cilType, [NotNullWhen(true)] out IProtobufType? protobufType);
 public delegate bool NameLookupFunc(string name, [MaybeNullWhen(false)] out string translatedName);
 
-public sealed class ProtodecContext
+// ReSharper disable ClassWithVirtualMembersNeverInherited.Global, MemberCanBePrivate.Global, MemberCanBeProtected.Global
+public class ProtodecContext
 {
     private readonly Dictionary<string, TopLevel> _parsed = [];
 
     public readonly List<Protobuf> Protobufs = [];
 
-    public NameLookupFunc? NameLookup { get; set; }
+    public ILogger? Logger { get; set; }
 
-    public TypeLookupFunc TypeLookup { get; set; } =
+    public NameLookupFunc? NameLookup { get; set; }
-        LookupScalarAndWellKnownTypes;
 
     public void WriteAllTo(IndentedTextWriter writer)
     {
@@ -50,12 +50,14 @@ public sealed class ProtodecContext
         }
     }
 
-    public Message ParseMessage(ICilType messageClass, ParserOptions options = ParserOptions.None)
+    public virtual Message ParseMessage(ICilType messageClass, ParserOptions options = ParserOptions.None)
     {
         Guard.IsTrue(messageClass is { IsClass: true, IsSealed: true });
+        using IDisposable? _ = Logger?.BeginScopeParsingMessage(messageClass.FullName);
 
         if (_parsed.TryGetValue(messageClass.FullName, out TopLevel? parsedMessage))
         {
+            Logger?.LogParsedMessage(parsedMessage.Name);
             return (Message)parsedMessage;
         }
 
@@ -79,17 +81,22 @@ public sealed class ProtodecContext
         for (int pi = 0, fi = 0; pi < properties.Count; pi++)
         {
             ICilProperty property     = properties[pi];
+            ICilType     propertyType = property.Type;
+
+            using IDisposable? __ = Logger?.BeginScopeParsingProperty(property.Name, propertyType.FullName);
+
             if (((options & ParserOptions.IncludePropertiesWithoutNonUserCodeAttribute) == 0 && !HasNonUserCodeAttribute(property.CustomAttributes)))
             {
+                Logger?.LogSkippingPropertyWithoutNonUserCodeAttribute();
                 continue;
             }
 
-            ICilType propertyType = property.Type;
-
             // only OneOf enums are defined nested directly in the message class
             if (propertyType.IsEnum && propertyType.DeclaringType?.Name == messageClass.Name)
             {
                 string oneOfName = TranslateOneOfPropName(property.Name);
+                Logger?.LogParsedOneOfField(oneOfName);
+
                 List<int> oneOfProtoFieldIds = propertyType.GetFields()
                                                            .Where(static field => field.IsLiteral)
                                                            .Select(static field => (int)field.ConstantValue!)
@@ -107,7 +114,13 @@ public sealed class ProtodecContext
                 pi++;
             }
 
-            MessageField field = new()
+            if (idFields.Count <= fi)
+            {
+                Logger?.LogFailedToLocateIdField();
+                continue;
+            }
+
+            MessageField field = new(message)
             {
                 Type       = ParseFieldType(propertyType, options, protobuf),
                 Name       = TranslateMessageFieldName(property.Name),
@@ -116,19 +129,23 @@ public sealed class ProtodecContext
                 HasHasProp = msgFieldHasHasProp
             };
 
+            Logger?.LogParsedField(field.Name, field.Id, field.Type.Name);
             message.Fields.Add(field.Id, field);
             fi++;
         }
 
+        Logger?.LogParsedMessage(message.Name);
         return message;
     }
 
-    public Enum ParseEnum(ICilType enumEnum, ParserOptions options = ParserOptions.None)
+    public virtual Enum ParseEnum(ICilType enumEnum, ParserOptions options = ParserOptions.None)
     {
         Guard.IsTrue(enumEnum.IsEnum);
+        using IDisposable? _ = Logger?.BeginScopeParsingEnum(enumEnum.FullName);
 
         if (_parsed.TryGetValue(enumEnum.FullName, out TopLevel? parsedEnum))
         {
+            Logger?.LogParsedEnum(parsedEnum.Name);
             return (Enum)parsedEnum;
         }
 
@@ -141,15 +158,19 @@ public sealed class ProtodecContext
 
         Protobuf protobuf = GetProtobuf(enumEnum, @enum, options);
 
-        foreach (ICilField field in enumEnum.GetFields().Where(static field => field.IsLiteral))
+        foreach (ICilField enumField in enumEnum.GetFields().Where(static field => field.IsLiteral))
         {
-            @enum.Fields.Add(
+            using IDisposable? __ = Logger?.BeginScopeParsingField(enumField.Name);
-                new EnumField
+
+            EnumField field = new()
             {
-                    Id         = (int)field.ConstantValue!,
+                Id         = (int)enumField.ConstantValue!,
-                    Name       = TranslateEnumFieldName(field.CustomAttributes, field.Name, @enum.Name),
+                Name       = TranslateEnumFieldName(enumField.CustomAttributes, enumField.Name, @enum.Name),
-                    IsObsolete = HasObsoleteAttribute(field.CustomAttributes)
+                IsObsolete = HasObsoleteAttribute(enumField.CustomAttributes)
-                });
+            };
+
+            Logger?.LogParsedField(field.Name, field.Id);
+            @enum.Fields.Add(field);
         }
 
         if (@enum.Fields.All(static field => field.Id != 0))
@@ -158,10 +179,11 @@ public sealed class ProtodecContext
             @enum.IsClosed   = true;
         }
 
+        Logger?.LogParsedEnum(@enum.Name);
         return @enum;
     }
 
-    public Service ParseService(ICilType serviceClass, ParserOptions options = ParserOptions.None)
+    public virtual Service ParseService(ICilType serviceClass, ParserOptions options = ParserOptions.None)
     {
         Guard.IsTrue(serviceClass.IsClass);
 
@@ -187,9 +209,11 @@ public sealed class ProtodecContext
         }
 
         Guard.IsNotNull(isClientClass);
+        using IDisposable? _ = Logger?.BeginScopeParsingService(serviceClass.DeclaringType!.FullName);
 
         if (_parsed.TryGetValue(serviceClass.DeclaringType!.FullName, out TopLevel? parsedService))
         {
+            Logger?.LogParsedService(parsedService.Name);
             return (Service)parsedService;
         }
 
@@ -202,15 +226,18 @@ public sealed class ProtodecContext
 
         Protobuf protobuf = NewProtobuf(serviceClass, service);
 
-        foreach (ICilMethod method in serviceClass.GetMethods().Where(static method => method is { IsInherited: false, IsPublic: true, IsStatic: false }))
+        foreach (ICilMethod cilMethod in serviceClass.GetMethods().Where(static method => method is { IsInherited: false, IsPublic: true, IsStatic: false, IsConstructor: false }))
         {
+            using IDisposable? __ = Logger?.BeginScopeParsingMethod(cilMethod.Name);
+
             if ((options & ParserOptions.IncludeServiceMethodsWithoutGeneratedCodeAttribute) == 0
-             && !HasGeneratedCodeAttribute(method.CustomAttributes, "grpc_csharp_plugin"))
+             && !HasGeneratedCodeAttribute(cilMethod.CustomAttributes, "grpc_csharp_plugin"))
             {
+                Logger?.LogSkippingMethodWithoutGeneratedCodeAttribute();
                 continue;
             }
 
-            ICilType requestType, responseType, returnType = method.ReturnType;
+            ICilType requestType, responseType, returnType = cilMethod.ReturnType;
             bool streamReq, streamRes;
 
             if (isClientClass.Value)
@@ -218,12 +245,14 @@ public sealed class ProtodecContext
                 string returnTypeName = TranslateTypeName(returnType);
                 if (returnTypeName == "AsyncUnaryCall`1")
                 {
+                    Logger?.LogSkippingDuplicateMethod();
                     continue;
                 }
 
-                List<ICilType> parameters = method.GetParameterTypes().ToList();
+                List<ICilType> parameters = cilMethod.GetParameterTypes().ToList();
                 if (parameters.Count > 2)
                 {
+                    Logger?.LogSkippingDuplicateMethod();
                     continue;
                 }
 
@@ -251,7 +280,7 @@ public sealed class ProtodecContext
             }
             else
             {
-                List<ICilType> parameters = method.GetParameterTypes().ToList();
+                List<ICilType> parameters = cilMethod.GetParameterTypes().ToList();
 
                 if (parameters[0].GenericTypeArguments.Count == 1)
                 {
@@ -276,22 +305,25 @@ public sealed class ProtodecContext
                 }
             }
 
-            service.Methods.Add(
+            ServiceMethod method = new(service)
-                new ServiceMethod
             {
-                    Name               = TranslateMethodName(method.Name),
+                Name               = TranslateMethodName(cilMethod.Name),
-                    IsObsolete         = HasObsoleteAttribute(method.CustomAttributes),
+                IsObsolete         = HasObsoleteAttribute(cilMethod.CustomAttributes),
                 RequestType        = ParseFieldType(requestType,  options, protobuf),
                 ResponseType       = ParseFieldType(responseType, options, protobuf),
                 IsRequestStreamed  = streamReq,
                 IsResponseStreamed = streamRes
-                });
+            };
+
+            Logger?.LogParsedMethod(method.Name, method.RequestType.Name, method.ResponseType.Name);
+            service.Methods.Add(method);
         }
 
+        Logger?.LogParsedService(service.Name);
         return service;
     }
 
-    private IProtobufType ParseFieldType(ICilType type, ParserOptions options, Protobuf referencingProtobuf)
+    protected IProtobufType ParseFieldType(ICilType type, ParserOptions options, Protobuf referencingProtobuf)
     {
         switch (type.GenericTypeArguments.Count)
         {
@@ -304,7 +336,7 @@ public sealed class ProtodecContext
                     ParseFieldType(type.GenericTypeArguments[1], options, referencingProtobuf));
         }
 
-        if (!TypeLookup(type, out IProtobufType? fieldType))
+        if (!LookupType(type, out IProtobufType? fieldType))
         {
             if (type.IsEnum)
             {
@@ -338,7 +370,132 @@ public sealed class ProtodecContext
         return fieldType;
     }
 
-    private Protobuf NewProtobuf(ICilType topLevelType, TopLevel topLevel)
+    protected virtual bool LookupType(ICilType cilType, [NotNullWhen(true)] out IProtobufType? protobufType)
+    {
+        switch (cilType.FullName)
+        {
+            case "System.String":
+                protobufType = Scalar.String;
+                break;
+            case "System.Boolean":
+                protobufType = Scalar.Bool;
+                break;
+            case "System.Double":
+                protobufType = Scalar.Double;
+                break;
+            case "System.UInt32":
+                protobufType = Scalar.UInt32;
+                break;
+            case "System.UInt64":
+                protobufType = Scalar.UInt64;
+                break;
+            case "System.Int32":
+                protobufType = Scalar.Int32;
+                break;
+            case "System.Int64":
+                protobufType = Scalar.Int64;
+                break;
+            case "System.Single":
+                protobufType = Scalar.Float;
+                break;
+            case "Google.Protobuf.ByteString":
+                protobufType = Scalar.Bytes;
+                break;
+
+            case "Google.Protobuf.WellKnownTypes.Any":
+                protobufType = WellKnown.Any;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Api":
+                protobufType = WellKnown.Api;
+                break;
+            case "Google.Protobuf.WellKnownTypes.BoolValue":
+                protobufType = WellKnown.BoolValue;
+                break;
+            case "Google.Protobuf.WellKnownTypes.BytesValue":
+                protobufType = WellKnown.BytesValue;
+                break;
+            case "Google.Protobuf.WellKnownTypes.DoubleValue":
+                protobufType = WellKnown.DoubleValue;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Duration":
+                protobufType = WellKnown.Duration;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Empty":
+                protobufType = WellKnown.Empty;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Enum":
+                protobufType = WellKnown.Enum;
+                break;
+            case "Google.Protobuf.WellKnownTypes.EnumValue":
+                protobufType = WellKnown.EnumValue;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Field":
+                protobufType = WellKnown.Field;
+                break;
+            case "Google.Protobuf.WellKnownTypes.FieldMask":
+                protobufType = WellKnown.FieldMask;
+                break;
+            case "Google.Protobuf.WellKnownTypes.FloatValue":
+                protobufType = WellKnown.FloatValue;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Int32Value":
+                protobufType = WellKnown.Int32Value;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Int64Value":
+                protobufType = WellKnown.Int64Value;
+                break;
+            case "Google.Protobuf.WellKnownTypes.ListValue":
+                protobufType = WellKnown.ListValue;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Method":
+                protobufType = WellKnown.Method;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Mixin":
+                protobufType = WellKnown.Mixin;
+                break;
+            case "Google.Protobuf.WellKnownTypes.NullValue":
+                protobufType = WellKnown.NullValue;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Option":
+                protobufType = WellKnown.Option;
+                break;
+            case "Google.Protobuf.WellKnownTypes.SourceContext":
+                protobufType = WellKnown.SourceContext;
+                break;
+            case "Google.Protobuf.WellKnownTypes.StringValue":
+                protobufType = WellKnown.StringValue;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Struct":
+                protobufType = WellKnown.Struct;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Syntax":
+                protobufType = WellKnown.Syntax;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Timestamp":
+                protobufType = WellKnown.Timestamp;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Type":
+                protobufType = WellKnown.Type;
+                break;
+            case "Google.Protobuf.WellKnownTypes.UInt32Value":
+                protobufType = WellKnown.UInt32Value;
+                break;
+            case "Google.Protobuf.WellKnownTypes.UInt64Value":
+                protobufType = WellKnown.UInt64Value;
+                break;
+            case "Google.Protobuf.WellKnownTypes.Value":
+                protobufType = WellKnown.Value;
+                break;
+
+            default:
+                protobufType = null;
+                return false;
+        }
+
+        return true;
+    }
+
+    protected Protobuf NewProtobuf(ICilType topLevelType, TopLevel topLevel)
     {
         Protobuf protobuf = new()
         {
@@ -353,7 +510,7 @@ public sealed class ProtodecContext
         return protobuf;
     }
 
-    private Protobuf GetProtobuf<T>(ICilType topLevelType, T topLevel, ParserOptions options)
+    protected Protobuf GetProtobuf<T>(ICilType topLevelType, T topLevel, ParserOptions options)
         where T : TopLevel, INestableType
     {
         Protobuf protobuf;
@@ -379,12 +536,12 @@ public sealed class ProtodecContext
         return protobuf;
     }
 
-    private string TranslateMethodName(string methodName) =>
+    protected string TranslateMethodName(string methodName) =>
         NameLookup?.Invoke(methodName, out string? translatedName) == true
             ? translatedName
             : methodName;
 
-    private string TranslateOneOfPropName(string oneOfPropName)
+    protected string TranslateOneOfPropName(string oneOfPropName)
     {
         if (NameLookup?.Invoke(oneOfPropName, out string? translatedName) != true)
         {
@@ -399,7 +556,7 @@ public sealed class ProtodecContext
         return translatedName!.TrimEnd("Case").ToSnakeCaseLower();
     }
 
-    private string TranslateMessageFieldName(string fieldName)
+    protected string TranslateMessageFieldName(string fieldName)
     {
         if (NameLookup?.Invoke(fieldName, out string? translatedName) != true)
         {
@@ -414,7 +571,7 @@ public sealed class ProtodecContext
         return translatedName!.ToSnakeCaseLower();
     }
 
-    private string TranslateEnumFieldName(IEnumerable<ICilAttribute> attributes, string fieldName, string enumName)
+    protected string TranslateEnumFieldName(IEnumerable<ICilAttribute> attributes, string fieldName, string enumName)
     {
         if (LibCpp2IlMain.MetadataVersion >= 29f //TODO: do not merge into master until il2cpp-specific global is removed
          && attributes.SingleOrDefault(static attr => attr.Type.Name == "OriginalNameAttribute")
@@ -441,7 +598,7 @@ public sealed class ProtodecContext
         return enumName + '_' + fieldName;
     }
 
-    private string TranslateTypeName(ICilType type)
+    protected string TranslateTypeName(ICilType type)
     {
         if (NameLookup is null)
             return type.Name;
@@ -467,139 +624,18 @@ public sealed class ProtodecContext
         return translatedName;
     }
 
-    public static bool LookupScalarAndWellKnownTypes(ICilType cilType, [NotNullWhen(true)] out IProtobufType? protobufType)
-    {
-        switch (cilType.FullName)
-        {
-            case "System.String":
-                protobufType = Scalar.String;
-                return true;
-            case "System.Boolean":
-                protobufType = Scalar.Bool;
-                return true;
-            case "System.Double":
-                protobufType = Scalar.Double;
-                return true;
-            case "System.UInt32":
-                protobufType = Scalar.UInt32;
-                return true;
-            case "System.UInt64":
-                protobufType = Scalar.UInt64;
-                return true;
-            case "System.Int32":
-                protobufType = Scalar.Int32;
-                return true;
-            case "System.Int64":
-                protobufType = Scalar.Int64;
-                return true;
-            case "System.Single":
-                protobufType = Scalar.Float;
-                return true;
-            case "Google.Protobuf.ByteString":
-                protobufType = Scalar.Bytes;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Any":
-                protobufType = WellKnown.Any;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Api":
-                protobufType = WellKnown.Api;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.BoolValue":
-                protobufType = WellKnown.BoolValue;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.BytesValue":
-                protobufType = WellKnown.BytesValue;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.DoubleValue":
-                protobufType = WellKnown.DoubleValue;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Duration":
-                protobufType = WellKnown.Duration;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Empty":
-                protobufType = WellKnown.Empty;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Enum":
-                protobufType = WellKnown.Enum;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.EnumValue":
-                protobufType = WellKnown.EnumValue;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Field":
-                protobufType = WellKnown.Field;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.FieldMask":
-                protobufType = WellKnown.FieldMask;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.FloatValue":
-                protobufType = WellKnown.FloatValue;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Int32Value":
-                protobufType = WellKnown.Int32Value;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Int64Value":
-                protobufType = WellKnown.Int64Value;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.ListValue":
-                protobufType = WellKnown.ListValue;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Method":
-                protobufType = WellKnown.Method;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Mixin":
-                protobufType = WellKnown.Mixin;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.NullValue":
-                protobufType = WellKnown.NullValue;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Option":
-                protobufType = WellKnown.Option;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.SourceContext":
-                protobufType = WellKnown.SourceContext;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.StringValue":
-                protobufType = WellKnown.StringValue;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Struct":
-                protobufType = WellKnown.Struct;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Syntax":
-                protobufType = WellKnown.Syntax;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Timestamp":
-                protobufType = WellKnown.Timestamp;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Type":
-                protobufType = WellKnown.Type;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.UInt32Value":
-                protobufType = WellKnown.UInt32Value;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.UInt64Value":
-                protobufType = WellKnown.UInt64Value;
-                return true;
-            case "Google.Protobuf.WellKnownTypes.Value":
-                protobufType = WellKnown.Value;
-                return true;
-            default:
-                protobufType = null;
-                return false;
-        }
-    }
-
     // ReSharper disable once IdentifierTypo
-    private static bool IsBeebyted(string name) =>
+    protected static bool IsBeebyted(string name) =>
         name.Length == 11 && name.CountUpper() == 11;
 
-    private static bool HasGeneratedCodeAttribute(IEnumerable<ICilAttribute> attributes, string tool) =>
+    protected static bool HasGeneratedCodeAttribute(IEnumerable<ICilAttribute> attributes, string tool) =>
         attributes.Any(attr => attr.Type.Name == nameof(GeneratedCodeAttribute)
                             && (LibCpp2IlMain.MetadataVersion               < 29f //TODO: do not merge into master until il2cpp-specific global is removed
                              || attr.ConstructorArgumentValues[0] as string == tool));
 
-    private static bool HasNonUserCodeAttribute(IEnumerable<ICilAttribute> attributes) =>
+    protected static bool HasNonUserCodeAttribute(IEnumerable<ICilAttribute> attributes) =>
         attributes.Any(static attr => attr.Type.Name == nameof(DebuggerNonUserCodeAttribute));
 
-    private static bool HasObsoleteAttribute(IEnumerable<ICilAttribute> attributes) =>
+    protected static bool HasObsoleteAttribute(IEnumerable<ICilAttribute> attributes) =>
         attributes.Any(static attr => attr.Type.Name == nameof(ObsoleteAttribute));
 }

src/protodec/Program.cs

@@ -15,6 +15,7 @@ using LibProtodec;
 using LibProtodec.Loaders;
 using LibProtodec.Models.Cil;
 using LibProtodec.Models.Protobuf;
+using Microsoft.Extensions.Logging;
 
 const string indent = "  ";
 const string help   = """
@@ -25,6 +26,7 @@ const string help   = """
       unity_version         The version of Unity which was used to create the metadata file or alternatively, the path to the globalgamemanagers or the data.unity3d file.
       out_path              An existing directory to output into individual files, otherwise output to a single file.
     Options:
+      --debug                                                     Drops the minimum log level to Debug.
       --parse_service_servers                                     Parses gRPC service definitions from server classes.
       --parse_service_clients                                     Parses gRPC service definitions from client classes.
       --skip_enums                                                Skip parsing enums and replace references to them with int32.
@@ -43,6 +45,9 @@ string        metadata = args[1];
 string        uVersion = args[2];
 string        outPath  = Path.GetFullPath(args[3]);
 ParserOptions options  = ParserOptions.None;
+LogLevel      logLevel = args.Contains("--debug")
+    ? LogLevel.Debug
+    : LogLevel.Information;
 
 if (args.Contains("--skip_enums"))
     options |= ParserOptions.SkipEnums;
@@ -62,9 +67,21 @@ if (!UnityVersion.TryParse(uVersion, out UnityVersion unityVersion, out _))
             File.OpenRead(uVersion));
 }
 
-using ICilAssemblyLoader loader = new Il2CppAssemblyLoader(assembly, metadata, unityVersion);
+using ILoggerFactory loggerFactory = LoggerFactory.Create(
-ProtodecContext ctx = new();
+    builder => builder.AddSimpleConsole(static console => console.IncludeScopes = true)
+                      .SetMinimumLevel(logLevel));
+ILogger logger = loggerFactory.CreateLogger("protodec");
 
+logger.LogInformation("Loading target assemblies...");
+using CilAssemblyLoader loader = new Il2CppAssemblyLoader(
+    assembly, metadata, unityVersion, loggerFactory.CreateLogger<Il2CppAssemblyLoader>());
+
+ProtodecContext ctx = new()
+{
+    Logger = loggerFactory.CreateLogger<ProtodecContext>()
+};
+
+logger.LogInformation("Parsing Protobuf message types...");
 foreach (ICilType message in GetProtobufMessageTypes())
 {
     ctx.ParseMessage(message, options);
@@ -72,6 +89,7 @@ foreach (ICilType message in GetProtobufMessageTypes())
 
 if (args.Contains("--parse_service_servers"))
 {
+    logger.LogInformation("Parsing Protobuf service server types...");
     foreach (ICilType service in GetProtobufServiceServerTypes())
     {
         ctx.ParseService(service, options);
@@ -80,6 +98,7 @@ if (args.Contains("--parse_service_servers"))
 
 if (args.Contains("--parse_service_clients"))
 {
+    logger.LogInformation("Parsing Protobuf service client types...");
     foreach (ICilType service in GetProtobufServiceClientTypes())
     {
         ctx.ParseService(service, options);
@@ -88,8 +107,9 @@ if (args.Contains("--parse_service_clients"))
 
 if (Directory.Exists(outPath))
 {
-    HashSet<string> writtenFiles = [];
+    logger.LogInformation("Writing {count} Protobuf files to \"{path}\"...", ctx.Protobufs.Count, outPath);
 
+    HashSet<string> writtenFiles = [];
     foreach (Protobuf protobuf in ctx.Protobufs)
     {
         // This workaround stops files from being overwritten in the case of a naming conflict,
@@ -110,6 +130,8 @@ if (Directory.Exists(outPath))
 }
 else
 {
+    logger.LogInformation("Writing Protobufs as a single file to \"{path}\"...", outPath);
+
     using StreamWriter       streamWriter = new(outPath);
     using IndentedTextWriter indentWriter = new(streamWriter, indent);
 

src/protodec/protodec.csproj

@@ -12,6 +12,7 @@
 
   <ItemGroup>
     <ProjectReference Include="$(SolutionDir)src\LibProtodec\LibProtodec.csproj" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="9.0.0-preview.5.24306.7" />
   </ItemGroup>
 
 </Project>