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// Copyright 2013 Canonical Ltd.
// Licensed under the LGPLv3, see LICENSE file for details.
package cmd
import (
"strings"
"github.com/juju/gnuflag"
)
// StringsValue implements gnuflag.Value for a comma separated list of
// strings. This allows flags to be created where the target is []string, and
// the caller is after comma separated values.
type StringsValue []string
var _ gnuflag.Value = (*StringsValue)(nil)
// NewStringsValue is used to create the type passed into the gnuflag.FlagSet Var function.
// f.Var(cmd.NewStringsValue(defaultValue, &someMember), "name", "help")
func NewStringsValue(defaultValue []string, target *[]string) *StringsValue {
value := (*StringsValue)(target)
*value = defaultValue
return value
}
// Implements gnuflag.Value Set.
func (v *StringsValue) Set(s string) error {
*v = strings.Split(s, ",")
return nil
}
// Implements gnuflag.Value String.
func (v *StringsValue) String() string {
return strings.Join(*v, ",")
}
// AppendStringsValue implements gnuflag.Value for a value that can be set
// multiple times, and it appends each value to the slice.
type AppendStringsValue []string
var _ gnuflag.Value = (*AppendStringsValue)(nil)
// NewAppendStringsValue is used to create the type passed into the gnuflag.FlagSet Var function.
// f.Var(cmd.NewAppendStringsValue(&someMember), "name", "help")
func NewAppendStringsValue(target *[]string) *AppendStringsValue {
return (*AppendStringsValue)(target)
}
// Implements gnuflag.Value Set.
func (v *AppendStringsValue) Set(s string) error {
*v = append(*v, s)
return nil
}
// Implements gnuflag.Value String.
func (v *AppendStringsValue) String() string {
return strings.Join(*v, ",")
}
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