golang-dependency-injection

Implement dependency injection in Go by passing dependencies through manual constructors. This keeps your code testable and free of global state by explicitly wiring components like Config and Database into services in main.

Compare Go dependency injection libraries by evaluating google/wire for compile-time generation, uber-go/dig or fx for runtime reflection, and samber/do. Choice depends on your application's need for startup speed versus runtime flexibility.

Structure mocks for Go dependency injection by designing constructors around interfaces. This allows easy substitution of real dependencies with mock implementations during testing, ensuring observable lifecycles and clean startup/shutdown.

Avoid init-based setup for Go dependency injection when you need testable and predictable code. Enforcing best practices means bypassing globals and init functions to explicitly manage component lifecycles and dependencies in main.

Yes, manual constructor injection in Go supports application lifecycle management. It allows you to design for observable lifecycles, ensuring proper startup and shutdown sequences for components like databases and user services.

Yes, you can use google/wire with existing Go projects. It generates boilerplate code for manual constructor injection, transitioning your project to compile-time dependency injection while maintaining testability.