/
prompter.go
112 lines (87 loc) · 2.33 KB
/
prompter.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
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
package console
import (
"fmt"
"strings"
"github.com/peterh/liner"
)
var Stdin = newTerminalPrompter()
type UserPrompter interface {
PromptInput(prompt string) (string, error)
PromptPassword(prompt string) (string, error)
PromptConfirm(prompt string) (bool, error)
SetHistory(history []string)
AppendHistory(command string)
ClearHistory()
SetWordCompleter(completer WordCompleter)
}
type WordCompleter func(line string, pos int) (string, []string, string)
type terminalPrompter struct {
*liner.State
warned bool
supported bool
normalMode liner.ModeApplier
rawMode liner.ModeApplier
}
func newTerminalPrompter() *terminalPrompter {
p := new(terminalPrompter)
normalMode, _ := liner.TerminalMode()
p.State = liner.NewLiner()
rawMode, err := liner.TerminalMode()
if err != nil || !liner.TerminalSupported() {
p.supported = false
} else {
p.supported = true
p.normalMode = normalMode
p.rawMode = rawMode
normalMode.ApplyMode()
}
p.SetCtrlCAborts(true)
p.SetTabCompletionStyle(liner.TabPrints)
p.SetMultiLineMode(true)
return p
}
func (p *terminalPrompter) PromptInput(prompt string) (string, error) {
if p.supported {
p.rawMode.ApplyMode()
defer p.normalMode.ApplyMode()
} else {
fmt.Print(prompt)
prompt = ""
defer fmt.Println()
}
return p.State.Prompt(prompt)
}
func (p *terminalPrompter) PromptPassword(prompt string) (passwd string, err error) {
if p.supported {
p.rawMode.ApplyMode()
defer p.normalMode.ApplyMode()
return p.State.PasswordPrompt(prompt)
}
if !p.warned {
fmt.Println("!! Unsupported terminal, password will be echoed.")
p.warned = true
}
fmt.Print(prompt)
passwd, err = p.State.Prompt("")
fmt.Println()
return passwd, err
}
func (p *terminalPrompter) PromptConfirm(prompt string) (bool, error) {
input, err := p.Prompt(prompt + " [y/N] ")
if len(input) > 0 && strings.ToUpper(input[:1]) == "Y" {
return true, nil
}
return false, err
}
func (p *terminalPrompter) SetHistory(history []string) {
p.State.ReadHistory(strings.NewReader(strings.Join(history, "\n")))
}
func (p *terminalPrompter) AppendHistory(command string) {
p.State.AppendHistory(command)
}
func (p *terminalPrompter) ClearHistory() {
p.State.ClearHistory()
}
func (p *terminalPrompter) SetWordCompleter(completer WordCompleter) {
p.State.SetWordCompleter(liner.WordCompleter(completer))
}