Add fatal level and Fatal/Fatalf funcs.
Add a SetPrefix(string) and Child(string) *Logger.
Default package-level logger
// automatically prefixed as "Router: "
golog.Child("Router").Errorf("Route %s already exists", "/mypath")
// able to prefix the main logger or child
golog.Child("Server").SetPrefix("HTTP Server: ").Infof("Server is running at %s", ":8080")
// Child does return a new *Logger based on its parent
srvLogger := golog.Child("Server")Same for independent instances
log := golog.New()
log.SetPrefix("App#1: ")
routerLogger := log.Child("Router")
routerLogger.Errorf("Route %s already exists", "/mypath")Example can be found here.
Users are now able to add custom or modify existing levels with an easy to remember API.
package main
import (
"github.com/kataras/golog"
)
func main() {
// Let's add a custom level,
//
// It should be starting from level index 6,
// because we have 6 built'n levels (0 is the start index):
// disable,
// fatal,
// error,
// warn,
// info
// debug
// First we create our level to a golog.Level
// in order to be used in the Log functions.
var SuccessLevel golog.Level = 6
// Register our level, just three fields.
golog.Levels[SuccessLevel] = &golog.LevelMetadata{
Name: "success",
RawText: "[SUCC]",
// ColorfulText (Green Color[SUCC])
ColorfulText: "\x1b[32m[SUCC]\x1b[0m",
}
// create a new golog logger
myLogger := golog.New()
// set its level to the higher in order to see it
// ("success" is the name we gave to our level)
myLogger.SetLevel("success")
// and finally print a log message with our custom level
myLogger.Logf(SuccessLevel, "This is a success log message with green color")
}Example can be found here.
-
Fix an issue occurred by previous chnages, which pio appends a trailing new line.
-
Add a new method
golog#NewLinewhich can override the default line breaker chars "\n".
Default output is os.Stdout instead of os.Stderr now, you can change it by golog#SetOutput.
Users are now able to customize both raw and colorful leveled log messages' prefix, example below.
Example Code:
package main
import (
"github.com/kataras/golog"
)
func main() {
// First argument is the raw text for outputs
// that are not support colors,
// second argument is the full colorful text (yes it can be different if you wish to).
//
// If the second argument is empty then golog will update the colorful text to the
// default color (i.e red on ErrorText) based on the first argument.
// Default is "[ERRO]"
golog.ErrorText("|ERROR|", "")
// Default is "[WARN]"
golog.WarnText("|WARN|", "")
// Default is "[INFO]"
golog.InfoText("|INFO|", "")
// Default is "[DBUG]"
golog.DebugText("|DEBUG|", "")
// Business as usual...
golog.SetLevel("debug")
golog.Println("This is a raw message, no levels, no colors.")
golog.Info("This is an info message, with colors (if the output is terminal)")
golog.Warn("This is a warning message")
golog.Error("This is an error message")
golog.Debug("This is a debug message")
}This feature has been implemented after @carlca 's suggestion, here.
Increase the logger's performance by reducing the use of buffers on the pio library