mirror of https://github.com/hrfee/jfa-go.git
137 lines
2.5 KiB
Go
137 lines
2.5 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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"errors"
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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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// SetFatalFunc(f func(err interface{}))
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// }
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type Logger struct {
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empty bool
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logger *log.Logger
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shortfile bool
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printer *c.Color
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fatalFunc func(err interface{})
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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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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 NewEmptyLogger() (l *Logger) {
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l = &Logger{
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empty: true,
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}
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return
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}
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func (l *Logger) Printf(format string, v ...interface{}) {
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if l.empty {
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return
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}
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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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if l.empty {
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return
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}
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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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if l.empty {
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return
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}
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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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if l.empty {
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return
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}
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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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if l.empty {
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return
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}
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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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if l.fatalFunc != nil {
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l.fatalFunc(errors.New(out))
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} else {
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l.logger.Fatal(out)
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}
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}
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func (l *Logger) SetFatalFunc(f func(err interface{})) {
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l.fatalFunc = f
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}
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