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var.go
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var.go
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package rig
import (
"flag"
"reflect"
"github.com/Pimmr/rig/validators"
)
type varValidators struct {
flag.Value
validators []validators.Var
}
func (v varValidators) Set(s string) error {
err := v.Value.Set(s)
if err != nil {
return err
}
for _, validator := range v.validators {
err = validator(v.Value)
if err != nil {
return err
}
}
return nil
}
func (v varValidators) New(i interface{}) flag.Value {
return varValidators{
Value: i.(flag.Value),
validators: v.validators,
}
}
func (v varValidators) IsNil() bool {
return v.Value == nil || reflect.ValueOf(v.Value).IsNil()
}
// Var creates a flag for a flag.Value variable.
func Var(v flag.Value, flag, env, usage string, validators ...validators.Var) *Flag {
return &Flag{
Value: varValidators{
Value: v,
validators: validators,
},
Name: flag,
Env: env,
Usage: usage,
}
}