forked from mitchellh/go-homedir
-
Notifications
You must be signed in to change notification settings - Fork 0
/
homedir.go
84 lines (70 loc) · 1.73 KB
/
homedir.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
package homedir
import (
"bytes"
"errors"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
)
// Dir returns the home directory for the executing user.
//
// This uses an OS-specific method for discovering the home directory.
// An error is returned if a home directory cannot be detected.
func Dir() (string, error) {
if runtime.GOOS == "windows" {
return dirWindows()
}
// Unix-like system, so just assume Unix
return dirUnix()
}
// Expand expands the path to include the home directory if the path
// is prefixed with `~`. If it isn't prefixed with `~`, the path is
// returned as-is.
func Expand(path string) (string, error) {
if len(path) == 0 {
return path, nil
}
if path[0] != '~' {
return path, nil
}
if len(path) > 1 && path[1] != '/' && path[1] != '\\' {
return "", errors.New("cannot expand user-specific home dir")
}
dir, err := Dir()
if err != nil {
return "", err
}
return filepath.Join(dir, path[1:]), nil
}
func dirUnix() (string, error) {
// First prefer the HOME environmental variable
if home := os.Getenv("HOME"); home != "" {
return home, nil
}
// If that fails, try the shell
var stdout bytes.Buffer
cmd := exec.Command("sh", "-c", "eval echo ~$USER")
cmd.Stdout = &stdout
if err := cmd.Run(); err != nil {
return "", err
}
result := strings.TrimSpace(stdout.String())
if result == "" {
return "", errors.New("blank output when reading home directory")
}
return result, nil
}
func dirWindows() (string, error) {
drive := os.Getenv("HOMEDRIVE")
path := os.Getenv("HOMEPATH")
home := drive + path
if drive == "" || path == "" {
home = os.Getenv("USERPROFILE")
}
if home == "" {
return "", errors.New("HOMEDRIVE, HOMEPATH, and USERPROFILE are blank")
}
return home, nil
}