vendor/github.com/fsouza/go-dockerclient/external/github.com/docker/docker/pkg/longpath/longpath.go

   1 // longpath introduces some constants and helper functions for handling long paths
   2 // in Windows, which are expected to be prepended with `\\?\` and followed by either
   3 // a drive letter, a UNC server\share, or a volume identifier.
   4
   5 package longpath
   6
   7 import (
   8         "strings"
   9 )
  10
  11 // Prefix is the longpath prefix for Windows file paths.
  12 const Prefix = `\\?\`
  13
  14 // AddPrefix will add the Windows long path prefix to the path provided if
  15 // it does not already have it.
  16 func AddPrefix(path string) string {
  17         if !strings.HasPrefix(path, Prefix) {
  18                 if strings.HasPrefix(path, `\\`) {
  19                         // This is a UNC path, so we need to add 'UNC' to the path as well.
  20                         path = Prefix + `UNC` + path[1:]
  21                 } else {
  22                         path = Prefix + path
  23                 }
  24         }
  25         return path
  26 }