do - Dependency Injection

⚙️ A dependency injection toolkit based on Go 1.18+ Generics.

This library implements the Dependency Injection design pattern. It may replace the fantastic uber/dig package. samber/do uses Go 1.18+ generics and therefore offers a type‑safe API.

See also:

• samber/ro: Reactive Programming for Go: declarative and composable API for event-driven applications
• samber/lo: A Lodash-style Go library based on Go 1.18+ Generics
• samber/mo: Monads based on Go 1.18+ Generics (Option, Result, Either...)
• samber/cc-skills-golang: AI Agent Skills for Golang

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Why this name?

I love the short name for such a utility library. This name is the sum of DI and Go and no Go package uses this name.

💡 Features

• 📒 Service registration
  • Register by type
  • Register by name
  • Register multiple services from a package at once
• 🪃 Service invocation
  • Eager loading
  • Lazy loading
  • Transient loading
  • Tag-based invocation
  • Circular dependency detection
• 🧙‍♂️ Service aliasing
  • Implicit (provide struct, invoke interface)
  • Explicit (provide struct, bind interface, invoke interface)
• 🔁 Service lifecycle
  • Health check
  • Graceful unload (shutdown)
  • Dependency-aware parallel shutdown
  • Lifecycle hooks
• 📦 Scope (a.k.a module) tree
  • Visibility control
  • Dependency grouping
• 📤 Container
  • Dependency graph resolution and visualization
  • Default container
  • Container cloning
  • Service override
• 🧪 Debugging & introspection
  • Explain APIs: scope tree and service dependencies
  • Web UI & HTTP middleware (std, Gin, Fiber, Echo, Chi)
• 🌈 Lightweight, no dependencies
• 🔅 No code generation
• 😷 Type‑safe API

🚀 Install

# v2 (latest)
go get github.com/samber/do/v2@latest

# v1
go get github.com/samber/[email protected]

# AI Agent Skill
npx skills add https://github.com/samber/cc-skills-golang --skill golang-samber-do

This library is v2 and follows SemVer strictly.

No breaking changes will be made to exported APIs before v3.0.0.

This library has no dependencies except the Go std lib.

🔥 Migration from v1 to v2

Documentation here

🤠 Documentation

• GoDoc: https://godoc.org/github.com/samber/do/v2
• Documentation
• Examples
• Project templates

🎬 Project boilerplate

• do-template-api
• do-template-worker
• do-template-cli

🤝 Contributing

• Ping me on Twitter @samuelberthe (DMs, mentions, whatever :))
• Fork the project
• Fix open issues or request new features

Don't hesitate ;)

# Install some dev dependencies
make tools

# Run tests
make test
# or
make watch-test

👤 Contributors

💫 Show your support

Give a ⭐️ if this project helped you!

📝 License

Copyright © 2022 Samuel Berthe.

This project is MIT licensed.