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
|
// Package env provides the [Paths] struct for efficiently building paths from the environment.
package env
import (
"log"
"os"
"strconv"
"hakurei.app/check"
"hakurei.app/hst"
)
// Paths holds paths copied from the environment and is used to create [hst.Paths].
type Paths struct {
// TempDir is returned by [os.TempDir].
TempDir *check.Absolute
// RuntimePath is copied from $XDG_RUNTIME_DIR.
RuntimePath *check.Absolute
}
// Copy expands [Paths] into [hst.Paths].
func (env *Paths) Copy(v *hst.Paths, userid int) {
if env == nil || env.TempDir == nil || v == nil {
panic("attempting to use an invalid Paths")
}
v.TempDir = env.TempDir
v.SharePath = env.TempDir.Append("hakurei." + strconv.Itoa(userid))
if env.RuntimePath == nil {
// fall back to path in share since hakurei has no hard XDG dependency
v.RuntimePath = v.SharePath.Append("compat")
} else {
v.RuntimePath = env.RuntimePath
}
v.RunDirPath = v.RuntimePath.Append("hakurei")
}
// CopyPaths returns a populated [Paths].
func CopyPaths() *Paths { return CopyPathsFunc(log.Fatalf, os.TempDir, os.Getenv) }
// CopyPathsFunc returns a populated [Paths],
// using the provided [log.Fatalf], [os.TempDir], [os.Getenv] functions.
func CopyPathsFunc(
fatalf func(format string, v ...any),
tempdir func() string,
getenv func(key string) string,
) *Paths {
const xdgRuntimeDir = "XDG_RUNTIME_DIR"
var env Paths
if tempDir, err := check.NewAbs(tempdir()); err != nil {
fatalf("invalid TMPDIR: %v", err)
panic("unreachable")
} else {
env.TempDir = tempDir
}
if a, err := check.NewAbs(getenv(xdgRuntimeDir)); err == nil {
env.RuntimePath = a
}
return &env
}
|
