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
|
package main
import (
"code.laria.me/petrific/logging"
"flag"
"fmt"
"math/rand"
"os"
"time"
)
type subcmd func(env *Env, args []string) int
var subcmds = map[string]subcmd{
"write-dir": WriteDir,
"restore-dir": RestoreDir,
"take-snapshot": TakeSnapshot,
"create-snapshot": CreateSnapshot,
"list-snapshots": ListSnapshots,
"restore-snapshot": RestoreSnapshot,
"fsck": Fsck,
"storagecmd": StorageCmd,
}
func subcmdUsage(name string, usage string, flags *flag.FlagSet) func() {
return func() {
fmt.Fprintf(os.Stderr, "Usage: %s %s %s\n", os.Args[0], name, usage)
if flags != nil {
fmt.Fprintln(os.Stderr, "\nFlags:")
flags.PrintDefaults()
}
}
}
func subcmdErrout(log *logging.Log, name string) func(error) {
return func(err error) {
log.Error().Printf("%s: %s\n", name, err)
}
}
// Global flags
var (
flagConfPath = flag.String("config", "", "Use this config file instead of the default")
flagStorage = flag.String("storage", "", "Operate on this storage instead of the default one")
flagVerbosity = flag.Int("verbosity", int(logging.LWarn), "Verbosity level (0: quiet, 4: everything)")
)
func main() {
os.Exit(Main())
}
func Main() int {
rand.Seed(time.Now().UnixNano())
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: %s [global flags] command\n\nAvailable commands:\n", os.Args[0])
for cmd := range subcmds {
fmt.Fprintf(os.Stderr, " %s\n", cmd)
}
fmt.Fprintln(os.Stderr, "\nGlobal flags:")
flag.PrintDefaults()
}
flag.Parse()
log, err := createLogger(logging.Level(*flagVerbosity))
if err != nil {
fmt.Fprintln(os.Stderr, err)
return 1
}
env, err := NewEnv(log, *flagConfPath, *flagStorage)
if err != nil {
log.Error().Println(err)
return 1
}
defer env.Close()
remaining := make([]string, 0)
for _, arg := range flag.Args() {
if arg != "" {
remaining = append(remaining, arg)
}
}
var cmd subcmd
if len(remaining) > 0 {
cmd = subcmds[remaining[0]]
}
if cmd == nil {
flag.Usage()
return 1
}
return cmd(env, remaining[1:])
}
func createLogger(level logging.Level) (log *logging.Log, err error) {
if level < logging.LQuiet || level > logging.LDebug {
level = logging.LDebug
return nil, fmt.Errorf("verbosity %d is out of range", level)
}
return logging.NewLog(os.Stderr, level), nil
}
|
