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110 lines
2.3 KiB
Go
110 lines
2.3 KiB
Go
// Package logger provides a wrapper around log that adds color support with github.com/fatih/color.
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package logger
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import (
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"io"
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"log"
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"runtime"
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"strconv"
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c "github.com/fatih/color"
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)
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type Logger interface {
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Printf(format string, v ...interface{})
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Print(v ...interface{})
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Println(v ...interface{})
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Fatal(v ...interface{})
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Fatalf(format string, v ...interface{})
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}
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type logger struct {
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logger *log.Logger
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shortfile bool
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printer *c.Color
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}
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func Lshortfile() string {
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// 0 = This function, 1 = Print/Printf/Println, 2 = Caller of Print/Printf/Println
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_, file, line, ok := runtime.Caller(2)
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lineString := strconv.Itoa(line)
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if !ok {
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return ""
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}
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if file == "" {
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return lineString
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}
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for i := len(file) - 1; i > 0; i-- {
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if file[i] == '/' || file[i] == '\\' {
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file = file[i+1:]
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break
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}
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}
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return file + ":" + lineString + ":"
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}
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func NewLogger(out io.Writer, prefix string, flag int, color c.Attribute) (l logger) {
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// Use reimplemented Lshortfile since wrapping the log functions messes them up
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if flag&log.Lshortfile != 0 {
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flag -= log.Lshortfile
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l.shortfile = true
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}
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l.logger = log.New(out, prefix, flag)
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l.printer = c.New(color)
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return l
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}
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func (l logger) Printf(format string, v ...interface{}) {
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var out string
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if l.shortfile {
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out = Lshortfile()
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}
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out += " " + l.printer.Sprintf(format, v...)
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l.logger.Print(out)
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}
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func (l logger) Print(v ...interface{}) {
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var out string
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if l.shortfile {
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out = Lshortfile()
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}
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out += " " + l.printer.Sprint(v...)
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l.logger.Print(out)
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}
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func (l logger) Println(v ...interface{}) {
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var out string
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if l.shortfile {
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out = Lshortfile()
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}
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out += " " + l.printer.Sprintln(v...)
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l.logger.Print(out)
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}
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func (l logger) Fatal(v ...interface{}) {
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var out string
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if l.shortfile {
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out = Lshortfile()
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}
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out += " " + l.printer.Sprint(v...)
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l.logger.Fatal(out)
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}
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func (l logger) Fatalf(format string, v ...interface{}) {
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var out string
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if l.shortfile {
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out = Lshortfile()
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}
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out += " " + l.printer.Sprintf(format, v...)
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l.logger.Fatal(out)
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}
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type EmptyLogger bool
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func (l EmptyLogger) Printf(format string, v ...interface{}) {}
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func (l EmptyLogger) Print(v ...interface{}) {}
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func (l EmptyLogger) Println(v ...interface{}) {}
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func (l EmptyLogger) Fatal(v ...interface{}) {}
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func (l EmptyLogger) Fatalf(format string, v ...interface{}) {}
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