mirror of https://github.com/k3s-io/k3s
115 lines
3.1 KiB
Go
115 lines
3.1 KiB
Go
// Copyright 2018 The etcd Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package flags
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import (
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"errors"
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"fmt"
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"sort"
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"strings"
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)
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// SelectiveStringValue implements the flag.Value interface.
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type SelectiveStringValue struct {
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v string
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valids map[string]struct{}
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}
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// Set verifies the argument to be a valid member of the allowed values
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// before setting the underlying flag value.
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func (ss *SelectiveStringValue) Set(s string) error {
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if _, ok := ss.valids[s]; ok {
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ss.v = s
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return nil
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}
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return errors.New("invalid value")
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}
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// String returns the set value (if any) of the SelectiveStringValue
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func (ss *SelectiveStringValue) String() string {
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return ss.v
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}
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// Valids returns the list of valid strings.
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func (ss *SelectiveStringValue) Valids() []string {
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s := make([]string, 0, len(ss.valids))
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for k := range ss.valids {
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s = append(s, k)
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}
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sort.Strings(s)
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return s
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}
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// NewSelectiveStringValue creates a new string flag
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// for which any one of the given strings is a valid value,
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// and any other value is an error.
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//
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// valids[0] will be default value. Caller must be sure
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// len(valids) != 0 or it will panic.
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func NewSelectiveStringValue(valids ...string) *SelectiveStringValue {
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vm := make(map[string]struct{})
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for _, v := range valids {
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vm[v] = struct{}{}
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}
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return &SelectiveStringValue{valids: vm, v: valids[0]}
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}
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// SelectiveStringsValue implements the flag.Value interface.
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type SelectiveStringsValue struct {
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vs []string
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valids map[string]struct{}
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}
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// Set verifies the argument to be a valid member of the allowed values
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// before setting the underlying flag value.
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func (ss *SelectiveStringsValue) Set(s string) error {
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vs := strings.Split(s, ",")
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for i := range vs {
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if _, ok := ss.valids[vs[i]]; ok {
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ss.vs = append(ss.vs, vs[i])
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} else {
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return fmt.Errorf("invalid value %q", vs[i])
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}
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}
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sort.Strings(ss.vs)
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return nil
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}
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// String returns the set value (if any) of the SelectiveStringsValue.
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func (ss *SelectiveStringsValue) String() string {
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return strings.Join(ss.vs, ",")
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}
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// Valids returns the list of valid strings.
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func (ss *SelectiveStringsValue) Valids() []string {
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s := make([]string, 0, len(ss.valids))
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for k := range ss.valids {
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s = append(s, k)
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}
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sort.Strings(s)
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return s
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}
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// NewSelectiveStringsValue creates a new string slice flag
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// for which any one of the given strings is a valid value,
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// and any other value is an error.
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func NewSelectiveStringsValue(valids ...string) *SelectiveStringsValue {
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vm := make(map[string]struct{})
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for _, v := range valids {
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vm[v] = struct{}{}
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}
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return &SelectiveStringsValue{valids: vm, vs: []string{}}
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}
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