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
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
// The app program is a proof-of-concept frontend for cmd/hakurei.
//
// This program is not covered by the compatibility promise. The command line
// interface and configuration syntax may change at any time.
package main
import (
"context"
"log"
"os"
"os/signal"
"path/filepath"
"syscall"
"hakurei.app/check"
"hakurei.app/command"
"hakurei.app/fhs"
"hakurei.app/hst"
"hakurei.app/message"
)
func main() {
log.SetFlags(0)
log.SetPrefix("app: ")
msg := message.New(log.Default())
ctx, stop := signal.NotifyContext(context.Background(),
syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
defer stop()
var (
flagVerbose bool
flagBase string
base, template, initial, upper, work *check.Absolute
)
c := command.New(os.Stderr, log.Printf, "app", func([]string) (err error) {
msg.SwapVerbose(flagVerbose)
flagBase = os.ExpandEnv(flagBase)
if flagBase == "" {
flagBase = "state"
}
if flagBase, err = filepath.Abs(flagBase); err != nil {
return
} else if base, err = check.NewAbs(flagBase); err != nil {
return
}
template = base.Append("template")
initial = template.Append("initial")
upper = template.Append("upper")
work = template.Append("work")
return
}).Flag(
&flagVerbose,
"v", command.BoolFlag(false),
"Increase log verbosity",
).Flag(
&flagBase,
"d", command.StringFlag("$HAKUREI_APP_PATH"),
"Configuration and state directory",
)
{
var (
flagShell string
flagHome string
)
c.NewCommand(
"enter", "Enter mutable state template",
func([]string) error {
config := hst.Config{
ID: "app.hakurei.mutable",
Container: &hst.ContainerConfig{
Hostname: "mutable",
Filesystem: []hst.FilesystemConfigJSON{
{FilesystemConfig: &hst.FSOverlay{
Target: fhs.AbsRoot,
Lower: []*check.Absolute{initial},
Upper: upper,
Work: work,
}},
{FilesystemConfig: &hst.FSEphemeral{
Target: fhs.AbsTmp,
Write: true,
Perm: 0755,
}},
},
Username: "chronos",
Flags: hst.FMultiarch |
hst.FDevel |
hst.FUserns |
hst.FHostNet |
hst.FTty,
},
}
if a, err := check.NewAbs(flagShell); err != nil {
return err
} else {
config.Container.Shell = a
config.Container.Path = a
config.Container.Args = []string{
"-" + filepath.Base(flagShell),
}
}
if a, err := check.NewAbs(flagHome); err != nil {
return err
} else {
config.Container.Home = a
}
return run(ctx, msg, &config)
},
).Flag(
&flagShell,
"shell", command.StringFlag("/bin/zsh"),
"Shell program within container",
).Flag(
&flagHome,
"home", command.StringFlag("/home/chronos"),
"Home directory within container",
)
}
c.MustParse(os.Args[1:], func(err error) {
if w, ok := err.(interface{ Unwrap() []error }); !ok {
log.Fatal(err)
} else {
errs := w.Unwrap()
for i, e := range errs {
if i == len(errs)-1 {
log.Fatal(e)
}
log.Println(e)
}
}
})
}
|
