logger

Structured logging module for MinStack. Provides a *slog.Logger (Go standard library) with structured, high-performance output — no logging dependency required in your application code.

Installation

go get github.com/go-minstack/logger

Usage

The logger is included automatically by core.New() — you don't need to register logger.Module(). Just inject *slog.Logger wherever you need it:

type UserService struct {
    log *slog.Logger
}

func NewUserService(log *slog.Logger) *UserService {
    return &UserService{log: log}
}

func (s *UserService) Create(name string) {
    s.log.Info("user created", "name", name)
}

Configure via environment variables:

MINSTACK_LOG_FORMAT=console MINSTACK_LOG_LEVEL=debug ./myapp

FX lifecycle events

The logger also routes FX's own lifecycle events (Provided, Invoked, Started, etc.) through the same logger, replacing FX's default stdout output.

Environment variables

Variable	Values	Default
MINSTACK_LOG_LEVEL	trace, debug, info, warn, error	info
MINSTACK_LOG_FORMAT	json, console	json

Output formats

JSON (default) — structured, machine-readable, suitable for production:

{"level":"info","time":"2024-01-01T00:00:00Z","message":"user created","name":"Alice"}

Console — human-readable, colored, suitable for local development:

MINSTACK_LOG_FORMAT=console ./myapp

Notes

• Your app only imports log/slog (Go standard library)
• The logging backend is an internal implementation detail — not in your app's go.mod