Logger

Common logger is a thin wrapper on zerolog:
https://github.com/rs/zerolog

Instantiate logger

func New() *zerolog.Logger

Logger is also added to ctx of app package (ctx, cancel := app.Scaffold()).

Control output with env variables

By default logger logs in JSON format.

• LOG_LEVEL - default info
• LOG_PRETTY - pretty log instead of JSON - default false
• LOG_CALLER - will log caller file and line number - default false
• LOG_REVISION - specified revision value will be logged with each entry - default empty

Middleware

func Middleware(next http.Handler) http.Handler

Logger comes with middleware that does two things:

1. Adds logger to context. It can be later extracted from context with zerolog.ctx(context.Context)
2. If context has requestId set with chi middleware, it will be added to zerolog instance as requestId field in log.