Adding caller function, filename and line number to logrus log entries

log.go

package utils

import (
	"runtime"

	"github.com/Sirupsen/logrus"
)

// DecorateRuntimeContext appends line, file and function context to the logger
func DecorateRuntimeContext(logger *logrus.Entry) *logrus.Entry {
	if pc, file, line, ok := runtime.Caller(1); ok {
		fName := runtime.FuncForPC(pc).Name()
		return logger.WithField("file", file).WithField("line", line).WithField("func", fName)
	} else {
		return logger
	}
}

in every function

formatter := runtime.Formatter{ChildFormatter: &log.TextFormatter{
	FullTimestamp: true,
}}
formatter.Line = true
log.SetFormatter(&formatter)
log.SetOutput(os.Stdout)
log.SetLevel(log.InfoLevel)
log.WithFields(log.Fields{
	"file": "main.go",
}).Info("Server is running...")

Note: import ( runtime "github.com/banzaicloud/logrus-runtime-formatter"
log "github.com/sirupsen/logrus")