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restic/debug.go
2014-12-05 21:45:49 +01:00

37 lines
785 B
Go

// +build debug
package restic
import (
"fmt"
"io"
"log"
"os"
"path/filepath"
"time"
)
var debugLogger = initDebugLogger()
func initDebugLogger() *log.Logger {
// create new log file
filename := fmt.Sprintf("restic-lib-debug-%d-%s",
os.Getpid(), time.Now().Format("20060201-150405"))
path := filepath.Join(os.TempDir(), filename)
f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
fmt.Fprintf(os.Stderr, "unable to create debug log file: %v", err)
os.Exit(2)
}
// open logger
l := log.New(io.MultiWriter(os.Stderr, f), "DEBUG: ", log.LstdFlags)
fmt.Fprintf(os.Stderr, "debug log for restic library activated, writing log file %s\n", path)
return l
}
func debug(fmt string, args ...interface{}) {
debugLogger.Printf(fmt, args...)
}