filecopy: preserve modification time

copy.go

@@ -5,6 +5,7 @@ Copied from https://github.com/otiai10/copy and slightly altered.
 
 The MIT License (MIT)
 
+Copyright (c) 2019 Alexander Weinhold
 Copyright (c) 2018 otiai10
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -31,6 +32,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"time"
 )
 
 // Copy copies src to dest, doesn't matter if src is a directory or a file
@@ -64,6 +66,9 @@ func filecopy(src, dest string, info os.FileInfo) error {
 	if err = os.Chmod(f.Name(), info.Mode()); err != nil {
 		return err
 	}
+	if err = os.Chtimes(f.Name(), time.Now().Local(), info.ModTime()); err != nil {
+		return err
+	}
 	s, err := os.Open(src)
 	if err != nil {
 		return err