A simple standard out logger and formatter that supports log levels, namespaces and coloured output.
Download the package
go get -t github.com/amimof/loglevel-go
Import it in your code
package main
import "github.com/amimof/loglevel-go"
func main() {
// Create an instance of loglevel
loglevel := loglevel.New()
// Set loglevel. 3=Debug, 2=Info, 1=Warn, 0=Error. Defaults to Info.
loglevel.SetLevel(3)
// Log away
loglevel.Debug("Debug message")
loglevel.Info("Info message")
loglevel.Warn("Warn message")
loglevel.Error("Error message")
}Result
2017-01-21T13:56:28+01:00 DEBUG Debug message
2017-01-21T13:56:28+01:00 INFO Info message
2017-01-21T13:56:28+01:00 WARN Warn message
2017-01-21T13:56:28+01:00 ERROR Error message
loglevel supports both non-format and format print methods. Formatting is as good as in the native fmt package but with the additional log level functionality.
package main
import "github.com/amimof/loglevel-go"
func main() {
// Create an instance of loglevel
loglevel := loglevel.New()
// Set loglevel. 3=Debug, 2=Info, 1=Warn, 0=Error. Defaults to Info.
loglevel.SetLevel(3)
fname := "Luke"
lname := "Skywalker"
loglevel.Infof("The Jedi %s, %s", fname, lname)
}Result:
2017-01-21T13:53:54+01:00 INFO The Jedi Luke, Skywalker
You can created multiple loglevel instances in your app. Assign different names to them, to make debugging app packages an modules easy.
package main
import "github.com/amimof/loglevel-go"
func main() {
// Create an instance of loglevel
loglevel := loglevel.New().SetLevel(3)
// Set the namespace of this loglevel instance
loglevel.Name = "StarWarsNames"
loglevel.PrintName = true
fname := "Luke"
lname := "Skywalker"
loglevel.Infof("The Jedi %s, %s", fname, lname)
}Result:
2017-01-21T13:53:54+01:00 INFO StarWarsNames The Jedi Luke, Skywalker
If you like vanilla, fmt.Println(), formatting. Disable those fiels.
package main
import "github.com/amimof/loglevel-go"
func main() {
// Create an instance of loglevel
loglevel := loglevel.New()
loglevel.PrintTime = false
loglevel.PrintLevel = false
loglevel.PrintName = false
loglevel.Warn("Achtung, Achtung!")
}Result
Achtung, Achtung!
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