slog-gen

slog-gen

📌 About

When using log/slog in a production-grade project, it is useful to write helpers to avoid human error in the keys.

slog.Info("a user has logged in", "user_id", 42)
slog.Info("a user has logged out", "user_ip", 42) // oops :(

Depending on your code style, these can be simple constants (if you prefer key-value arguments)...

const UserId = "user_id"

...or constructors for slog.Attr (if you're a safety/performance advocate).

func UserId(value int) slog.Attr {
    return slog.Int("user_id", value)
}

slog-gen generates such code for you based on a simple config (a single source of truth), which makes it easy to share domain-specific helpers between related (micro)services.

📦 Install

Create and fill in the .slog.yml config based on the example, then add the following directive to any .go file and run go generate ./....

//go:generate go run go-simpler.org/slog-gen --config=.slog.yml

To get started, see the .slog.example.yml file and the example directory.