1//go:build windows
 2
 3package fsext
 4
 5import (
 6	"cmp"
 7	"os"
 8	"path/filepath"
 9)
10
11// WindowsWorkingDirDrive returns the drive letter of the current working
12// directory, e.g. "C:".
13// Falls back to the system drive if the current working directory cannot be
14// determined.
15func WindowsWorkingDirDrive() string {
16	if cwd, err := os.Getwd(); err == nil {
17		return filepath.VolumeName(cwd)
18	}
19	return WindowsSystemDrive()
20}
21
22// WindowsSystemDrive returns the drive letter of the system drive, e.g. "C:".
23func WindowsSystemDrive() string {
24	systemRoot := cmp.Or(os.Getenv("SYSTEMROOT"), os.Getenv("WINDIR"))
25	return filepath.VolumeName(systemRoot)
26}