io.Writer wrapper with line prefix and color customizations.
prefix := lineprefix.Prefix("app |")
writer := lineprefix.New(prefix)
fmt.Fprintln(writer, "hello world")output
app | hello world
now := func() string { return time.Now().UTC().Format("2006-01-02 15:04:05") }
prefix := lineprefix.PrefixFunc(now)
writer := lineprefix.New(prefix)
for i := 0; i<3; i++ {
fmt.Fprintln(writer, "hello world")
time.Sleep(time.Second)
}output
2021-06-01 18:53:15 hello world
2021-06-01 18:53:16 hello world
2021-06-01 18:53:17 hello world
Colors can be added with fatih/color.
A prefix with blue text on white background.
blue := color.New(color.FgBlue, color.BgWhite).SprintFunc()
prefix := lineprefix.Prefix(blue("app"))
writer := lineprefix.New(prefix)
fmt.Fprintln(writer, "this outputs blue on white prefix text")A blue colored output.
blue := color.New(color.FgBlue)
option := lineprefix.Color(blue)
writer := lineprefix.New(option)
fmt.Fprintln(writer, "this outputs blue color text")The example file has an overview of the capabilities.
go run example/main.go
colored prefix and colored text from the example.
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