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logging.go
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logging.go
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package lib
import (
"fmt"
"os"
"runtime"
"strings"
"time"
)
type LoggerStruct struct {
Print func(args ...interface{})
Flush func()
disabled bool
}
var Logger = &LoggerStruct{
Print: func(args ...interface{}) {
fmt.Fprint(os.Stderr, args...)
},
Flush: func() {},
disabled: strings.ToLower(os.Getenv("LOGGING") + " ")[:1] == "n",
}
func Caller(n int) string {
_, file, line, _ := runtime.Caller(n)
parts := strings.Split(file, "/")
keep := []string{
parts[len(parts)-2],
parts[len(parts)-1],
}
file = strings.Join(keep, "/")
return fmt.Sprintf("%s:%d: ", file, line)
}
func (l *LoggerStruct) Println(v ...interface{}) {
if !l.disabled {
var r []interface{}
r = append(r, Caller(2))
var xs []string
for _, x := range v {
xs = append(xs, fmt.Sprint(x))
}
r = append(r, strings.Join(xs, " "))
r = append(r, "\n")
l.Print(r...)
}
}
func (l *LoggerStruct) Printf(format string, v ...interface{}) {
if !l.disabled {
l.Print(fmt.Sprintf(Caller(2)+format, v...))
}
}
func (l *LoggerStruct) Fatal(v ...interface{}) {
var r []interface{}
r = append(r, Caller(2))
var xs []string
for _, x := range v {
xs = append(xs, fmt.Sprint(x))
}
r = append(r, strings.Join(xs, ""))
r = append(r, "\n")
l.Print(r...)
l.Flush()
os.Exit(1)
}
func (l *LoggerStruct) Fatalf(format string, v ...interface{}) {
l.Print(fmt.Sprintf(Caller(2)+format, v...))
l.Flush()
os.Exit(1)
}
type Debug struct {
start time.Time
name string
}
func (d *Debug) Println(v ...interface{}) {
var r []interface{}
r = append(r, Caller(3))
var xs []string
for _, x := range v {
xs = append(xs, fmt.Sprint(x))
}
r = append(r, strings.Join(xs, " "))
r = append(r, "\n")
Logger.Print(r...)
}
func (d *Debug) Log() {
d.Println("DEBUG", d.name, fmt.Sprint(int(time.Since(d.start).Milliseconds()))+"ms")
}