Jab Compile Time Dependency Injection

NOTE: this is an extremely early prototype not intended for any production use.

Jab provides a C# Source Generator based dependency injection container implementation.

Jab brings has no runtime dependencies.

Jab is AOT and linker friendly, all code is generated at compile time.

Jab allows easy debugging of the service resolution process.

Example

Add Jab package reference:

<ItemGroup>
    <PackageReference Include="Jab" Version="0.0.1-beta.1" PrivateAssets="all" />
</ItemGroup>

Define a service and implementation:

internal interface IService
{
    void M();
}

internal class ServiceImplementation : IService
{
    public void M()
    {
    }
}

Define a composition root and register services:

[CompositionRoot]
[Transient(typeof(IService), typeof(ServiceImplementation))]
internal partial class MyContainer { }

Use the container:

MyContainer c = new();
IService service = c.GetIService();

Features

The plan is to support the minimum feature set Microsoft.Extensions.DependencyInjection.Abstraction requires but NOT the IServiceCollection-based registration syntax as it is runtime based.

Debugging locally

Run dotnet build /t:GetCompilerCommandLine /p:SkipCompilerExecution=true in the Jab.Tests directory would update the Jab\Properties\launchSettings.json file to include csc invocation that allows F5 debugging of the generator targeting the Jab.Tests project.

AndreyTretyak/jab

Jab Compile Time Dependency Injection

Example

Features

Debugging locally