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package main
import (
"fmt"
"strings"
)
type enumVar struct {
Choices []string
Value string
}
// Set implements the flag.Value interface.
func (so *enumVar) Set(v string) error {
for _, c := range so.Choices {
if c == v {
so.Value = v
return nil
}
}
return fmt.Errorf("must be one of [%s]", strings.Join(so.Choices, " "))
}
func (so *enumVar) String() string {
return so.Value
}
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