Fantom-foundation/go-lachesis

package logger

import (
    "github.com/ethereum/go-ethereum/log"
    "github.com/evalphobia/logrus_sentry"
)

// init with defaults.
func init() {
    log.Root().SetHandler(
        log.CallerStackHandler("%v", log.StdoutHandler))
}

// SetDSN appends sentry hook to log root handler.
func SetDSN(value string) {
    // If DSN is empty, we don't create new hook.
    // Otherwise we'll the same error message for each new log.
    if value == "" {
        log.Warn("Sentry client DSN is empty")
        return
    }

    // TODO: find or make sentry log.Handler without logrus.
    sentry, err := logrus_sentry.NewSentryHook(value, nil)
    if err != nil {
        log.Warn("Probably Sentry host is not running", "err", err)
        return
    }

    log.Root().SetHandler(
        log.MultiHandler(
            log.Root().GetHandler(),
            LogrusHandler(sentry),
        ))
}

// SetLevel sets level filter on log root handler.
// So it should be called last.
func SetLevel(l string) {
    lvl, err := log.LvlFromString(l)
    if err != nil {
        panic(err)
    }

    log.Root().SetHandler(
        log.LvlFilterHandler(
            lvl,
            log.Root().GetHandler()))
}