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Copy pathstring_enumslice.go
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Copy pathstring_enumslice.go
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144 lines (122 loc) · 3.07 KB
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package flags
import (
"fmt"
"strings"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
type stringEnumSliceFlag[T ~string] struct {
ignoreCase bool
options []T
value []T
defaultValues []T
valueSet bool
docs string
name string
}
type StringEnumSliceFlagOption[T ~string] func(*stringEnumSliceFlag[T])
func IgnoreCase[T ~string]() StringEnumSliceFlagOption[T] {
return func(f *stringEnumSliceFlag[T]) {
f.ignoreCase = true
}
}
func DefaultValues[T ~string](values ...T) StringEnumSliceFlagOption[T] {
return func(f *stringEnumSliceFlag[T]) {
f.value = append(f.value, values...)
f.defaultValues = append(f.defaultValues, values...)
}
}
func StringEnumSliceFlag[T ~string](name string, possibleValues []T, docs string, opts ...StringEnumSliceFlagOption[T]) *stringEnumSliceFlag[T] {
f := &stringEnumSliceFlag[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 = &stringEnumSliceFlag[string]{}
func (s *stringEnumSliceFlag[T]) Register(cmd *cobra.Command) {
cmd.Flags().Var(s, s.name, s.Usage())
}
func (s *stringEnumSliceFlag[T]) Usage() string {
return s.docs + fmt.Sprintf(" (multiple of: %s)", s.fmtValues(s.options))
}
func (s *stringEnumSliceFlag[T]) Get() []T {
return s.value
}
func (s *stringEnumSliceFlag[T]) Ptr() *[]T {
if s.valueSet || s.value != nil {
return &s.value
}
return nil
}
func (s *stringEnumSliceFlag[T]) Name() string {
return s.name
}
func (s *stringEnumSliceFlag[T]) String() string {
return s.fmtValues(s.value)
}
func (s *stringEnumSliceFlag[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 *stringEnumSliceFlag[T]) Set(value string) error {
// If the default value is still set, remove it
// (Since we're going to append the incoming values to f.value)
if !s.valueSet {
s.value = nil
s.valueSet = true
}
if value == "" {
return fmt.Errorf("value cannot be empty")
}
values := strings.Split(value, ",")
return s.appendToValue(values)
}
func (s *stringEnumSliceFlag[T]) Type() string {
return "stringSlice"
}
func (s *stringEnumSliceFlag[T]) appendToValue(values []string) error {
for _, v := range values {
v = strings.TrimSpace(v)
foundValid := false
for _, o := range s.options {
if !s.ignoreCase && v == string(o) {
s.value = append(s.value, T(v))
foundValid = true
break
} else if s.ignoreCase && strings.EqualFold(v, string(o)) {
s.value = append(s.value, T(strings.ToLower(v)))
foundValid = true
break
}
}
if !foundValid {
return fmt.Errorf("found value %q, expected one of %q", v, s.options)
}
}
return nil
}
func (s *stringEnumSliceFlag[T]) Reset() {
if s.defaultValues == nil {
s.value = nil
s.valueSet = false
} else {
s.value = append([]T{}, s.defaultValues...)
}
}