-
Notifications
You must be signed in to change notification settings - Fork 1
/
main.go
75 lines (63 loc) · 1.26 KB
/
main.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
package main
import (
"encoding/base64"
"errors"
"flag"
"fmt"
"io/ioutil"
"os"
"github.com/crgimenes/goconfig"
)
type config struct {
File string `cfg:"file"`
Output string `cfg:"output" cfgDefault:"-"`
Decode bool `cfg:"decode" cfgDefault:"false"`
}
var errFileNotDefined = errors.New("Input file not defined")
var cfg config
func run() (outBuff []byte, err error) {
if cfg.File == "" {
lastPar := flag.NArg() - 1
cfg.File = flag.Arg(lastPar)
if cfg.File == "" {
err = errFileNotDefined
return
}
}
var buff []byte
buff, err = ioutil.ReadFile(cfg.File)
if err != nil {
return
}
if cfg.Decode {
outBuff = make([]byte, base64.StdEncoding.DecodedLen(len(buff)))
_, err = base64.StdEncoding.Decode(outBuff, buff)
if err != nil {
return
}
} else {
outBuff = make([]byte, base64.StdEncoding.EncodedLen(len(buff)))
base64.StdEncoding.Encode(outBuff, buff)
}
if cfg.Output == "-" {
fmt.Println(string(outBuff))
return
}
err = ioutil.WriteFile(cfg.Output, outBuff, 0644)
return
}
func configAndRun() (err error) {
goconfig.PrefixEnv = "BASE64"
err = goconfig.Parse(&cfg)
if err != nil {
return
}
_, err = run()
return
}
func main() {
if err := configAndRun(); err != nil {
println(err.Error())
os.Exit(1)
}
}