-
-
Notifications
You must be signed in to change notification settings - Fork 487
/
completion.go
88 lines (81 loc) · 2.22 KB
/
completion.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
package fish
import (
"bytes"
"fmt"
"html/template"
"strings"
"github.com/urfave/cli"
)
func longName(name string) string {
// "If s does not contain sep and sep is not empty, Split returns a slice of length 1 whose only element is s."
// from https://golang.org/pkg/strings/#Split
return strings.TrimSpace(strings.Split(name, ",")[0])
}
func shortName(name string) string {
parts := strings.Split(name, ",")
if len(parts) < 2 {
return ""
}
return strings.TrimSpace(parts[1])
}
func formatFlag(name, usage, typ string) string {
switch typ {
case "short":
return shortName(name)
case "long":
return longName(name)
case "usage":
return usage
default:
return ""
}
}
func formatFlagFunc(typ string) func(cli.Flag) (string, error) {
return func(f cli.Flag) (string, error) {
switch ft := f.(type) {
case cli.BoolFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.BoolTFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.Float64Flag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.GenericFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.Int64Flag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.Int64SliceFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.IntFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.IntSliceFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.StringFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.StringSliceFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.Uint64Flag:
return formatFlag(ft.Name, ft.Usage, typ), nil
case cli.UintFlag:
return formatFlag(ft.Name, ft.Usage, typ), nil
default:
return "", fmt.Errorf("unknown type: '%T'", f)
}
}
}
// GetCompletion returns a fish completion script
func GetCompletion(a *cli.App) (string, error) {
tplFuncs := template.FuncMap{
"formatShortFlag": formatFlagFunc("short"),
"formatLongFlag": formatFlagFunc("long"),
"formatFlagUsage": formatFlagFunc("usage"),
}
tpl, err := template.New("fish").Funcs(tplFuncs).Parse(fishTemplate)
if err != nil {
return "", err
}
buf := &bytes.Buffer{}
if err := tpl.Execute(buf, a); err != nil {
return "", err
}
return buf.String(), nil
}