package logrus_test import ( "os" "github.com/sirupsen/logrus" ) func Example_basic() { var log = logrus.New() log.Formatter = new(logrus.JSONFormatter) log.Formatter = new(logrus.TextFormatter) //default log.Formatter.(*logrus.TextFormatter).DisableColors = true // remove colors log.Formatter.(*logrus.TextFormatter).DisableTimestamp = true // remove timestamp from test output log.Level = logrus.DebugLevel log.Out = os.Stdout // file, err := os.OpenFile("logrus.log", os.O_CREATE|os.O_WRONLY, 0666) // if err == nil { // log.Out = file // } else { // log.Info("Failed to log to file, using default stderr") // } defer func() { err := recover() if err != nil { entry := err.(*logrus.Entry) log.WithFields(logrus.Fields{ "omg": true, "err_animal": entry.Data["animal"], "err_size": entry.Data["size"], "err_level": entry.Level, "err_message": entry.Message, "number": 100, }).Error("The ice breaks!") // or use Fatal() to force the process to exit with a nonzero code } }() log.WithFields(logrus.Fields{ "animal": "walrus", "number": 8, }).Debug("Started observing beach") log.WithFields(logrus.Fields{ "animal": "walrus", "size": 10, }).Info("A group of walrus emerges from the ocean") log.WithFields(logrus.Fields{ "omg": true, "number": 122, }).Warn("The group's number increased tremendously!") log.WithFields(logrus.Fields{ "temperature": -4, }).Debug("Temperature changes") log.WithFields(logrus.Fields{ "animal": "orca", "size": 9009, }).Panic("It's over 9000!") // Output: // level=debug msg="Started observing beach" animal=walrus number=8 // level=info msg="A group of walrus emerges from the ocean" animal=walrus size=10 // level=warning msg="The group's number increased tremendously!" number=122 omg=true // level=debug msg="Temperature changes" temperature=-4 // level=panic msg="It's over 9000!" animal=orca size=9009 // level=error msg="The ice breaks!" err_animal=orca err_level=panic err_message="It's over 9000!" err_size=9009 number=100 omg=true }