-
Notifications
You must be signed in to change notification settings - Fork 47
Expand file tree
/
Copy pathstring_enum.go
More file actions
134 lines (114 loc) · 2.59 KB
/
Copy pathstring_enum.go
File metadata and controls
134 lines (114 loc) · 2.59 KB
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
package flags
import (
"fmt"
"strings"
"github.com/spf13/pflag"
)
type stringEnumFlag[T ~string] struct {
ignoreCase bool
options []T
value T
defaultValue T
valueSet bool
docs string
name string
shortHand *string
}
type StringEnumFlagOption[T ~string] func(*stringEnumFlag[T])
func StringEnumIgnoreCase[T ~string]() StringEnumFlagOption[T] {
return func(f *stringEnumFlag[T]) {
f.ignoreCase = true
}
}
func StringEnumDefaultValue[T ~string](value T) StringEnumFlagOption[T] {
return func(f *stringEnumFlag[T]) {
f.value = value
f.defaultValue = value
f.valueSet = true
}
}
func StringEnumShortHand[T ~string](short string) StringEnumFlagOption[T] {
return func(f *stringEnumFlag[T]) {
f.shortHand = &short
}
}
func StringEnumFlag[T ~string](name string, possibleValues []T, docs string, opts ...StringEnumFlagOption[T]) *stringEnumFlag[T] {
f := &stringEnumFlag[T]{
name: name,
docs: docs,
}
for _, v := range possibleValues {
if string(v) != "unknown_default_open_api" {
f.options = append(f.options, v)
}
}
for _, opt := range opts {
opt(f)
}
return f
}
var _ pflag.Value = &stringEnumFlag[string]{}
func (s *stringEnumFlag[T]) Register(fs *pflag.FlagSet) {
if s.shortHand == nil {
fs.Var(s, s.name, s.Usage())
} else {
fs.VarP(s, s.name, *s.shortHand, s.Usage())
}
}
func (s *stringEnumFlag[T]) Usage() string {
return s.docs + fmt.Sprintf(" (one of: %s)", s.fmtValues(s.options))
}
func (s *stringEnumFlag[T]) Get() T {
return s.value
}
func (s *stringEnumFlag[T]) Ptr() *T {
if s.valueSet {
return &s.value
}
return nil
}
func (s *stringEnumFlag[T]) Name() string {
return s.name
}
func (s *stringEnumFlag[T]) String() string {
return string(s.value)
}
func (s *stringEnumFlag[T]) fmtValues(xs []T) string {
var sb strings.Builder
sb.WriteString("[")
for i, v := range xs {
sb.WriteString(string(v))
if i != len(xs)-1 {
sb.WriteString(", ")
}
}
sb.WriteString("]")
return sb.String()
}
func (s *stringEnumFlag[T]) Set(v string) error {
for _, o := range s.options {
if !s.ignoreCase && v == string(o) {
s.value = T(v)
s.valueSet = true
return nil
} else if s.ignoreCase && strings.EqualFold(v, string(o)) {
s.value = T(strings.ToLower(v))
s.valueSet = true
return nil
}
}
return fmt.Errorf("found value %q, expected one of %q", v, s.options)
}
func (s *stringEnumFlag[T]) Type() string {
return "string"
}
func (s *stringEnumFlag[T]) Reset() {
if s.defaultValue == "" {
var zero T
s.value = zero
s.valueSet = false
} else {
s.value = s.defaultValue
s.valueSet = true
}
}