80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
//go:build windows
|
|
// +build windows
|
|
|
|
package file
|
|
|
|
import (
|
|
"os"
|
|
"path/filepath"
|
|
"syscall"
|
|
)
|
|
|
|
// MkdirAll creates a directory named path, along with any necessary parents.
|
|
//
|
|
// Improves os.MkdirAll by avoiding trying to create a folder `\\?` when the
|
|
// volume of a given extended length path does not exist, and `\\?\UNC` when
|
|
// a network host name does not exist.
|
|
//
|
|
// Based on source code from golang's os.MkdirAll
|
|
// (https://github.com/golang/go/blob/master/src/os/path.go)
|
|
func MkdirAll(path string, perm os.FileMode) error {
|
|
// Fast path: if we can tell whether path is a directory or file, stop with success or error.
|
|
dir, err := os.Stat(path)
|
|
if err == nil {
|
|
if dir.IsDir() {
|
|
return nil
|
|
}
|
|
return &os.PathError{
|
|
Op: "mkdir",
|
|
Path: path,
|
|
Err: syscall.ENOTDIR,
|
|
}
|
|
}
|
|
|
|
// Slow path: make sure parent exists and then call Mkdir for path.
|
|
i := len(path)
|
|
for i > 0 && os.IsPathSeparator(path[i-1]) { // Skip trailing path separator.
|
|
i--
|
|
}
|
|
if i > 0 {
|
|
path = path[:i]
|
|
if path == filepath.VolumeName(path) {
|
|
// Make reference to a drive's root directory include the trailing slash.
|
|
// In extended-length form without trailing slash ("\\?\C:"), os.Stat
|
|
// and os.Mkdir both fails. With trailing slash ("\\?\C:\") works,
|
|
// and regular paths with or without it ("C:" and "C:\") both works.
|
|
path = path + string(os.PathSeparator)
|
|
} else {
|
|
// See if there is a parent to be created first.
|
|
// Not when path refer to a drive's root directory, because we don't
|
|
// want to return noninformative error trying to create \\?.
|
|
j := i
|
|
for j > 0 && !os.IsPathSeparator(path[j-1]) { // Scan backward over element.
|
|
j--
|
|
}
|
|
if j > 1 {
|
|
if path[:j-1] != `\\?\UNC` {
|
|
// Create parent.
|
|
err = MkdirAll(path[:j-1], perm)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Parent now exists; invoke Mkdir and use its result.
|
|
err = os.Mkdir(path, perm)
|
|
if err != nil {
|
|
// Handle arguments like "foo/." by
|
|
// double-checking that directory doesn't exist.
|
|
dir, err1 := os.Lstat(path)
|
|
if err1 == nil && dir.IsDir() {
|
|
return nil
|
|
}
|
|
return err
|
|
}
|
|
return nil
|
|
}
|