mirror of https://github.com/k3s-io/k3s
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
3.1 KiB
113 lines
3.1 KiB
/*
|
|
Copyright 2017 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package flag
|
|
|
|
import (
|
|
"fmt"
|
|
"sort"
|
|
"strings"
|
|
)
|
|
|
|
// MapStringString can be set from the command line with the format `--flag "string=string"`.
|
|
// Multiple flag invocations are supported. For example: `--flag "a=foo" --flag "b=bar"`. If this is desired
|
|
// to be the only type invocation `NoSplit` should be set to true.
|
|
// Multiple comma-separated key-value pairs in a single invocation are supported if `NoSplit`
|
|
// is set to false. For example: `--flag "a=foo,b=bar"`.
|
|
type MapStringString struct {
|
|
Map *map[string]string
|
|
initialized bool
|
|
NoSplit bool
|
|
}
|
|
|
|
// NewMapStringString takes a pointer to a map[string]string and returns the
|
|
// MapStringString flag parsing shim for that map
|
|
func NewMapStringString(m *map[string]string) *MapStringString {
|
|
return &MapStringString{Map: m}
|
|
}
|
|
|
|
// NewMapStringString takes a pointer to a map[string]string and sets `NoSplit`
|
|
// value to `true` and returns the MapStringString flag parsing shim for that map
|
|
func NewMapStringStringNoSplit(m *map[string]string) *MapStringString {
|
|
return &MapStringString{
|
|
Map: m,
|
|
NoSplit: true,
|
|
}
|
|
}
|
|
|
|
// String implements github.com/spf13/pflag.Value
|
|
func (m *MapStringString) String() string {
|
|
if m == nil || m.Map == nil {
|
|
return ""
|
|
}
|
|
pairs := []string{}
|
|
for k, v := range *m.Map {
|
|
pairs = append(pairs, fmt.Sprintf("%s=%s", k, v))
|
|
}
|
|
sort.Strings(pairs)
|
|
return strings.Join(pairs, ",")
|
|
}
|
|
|
|
// Set implements github.com/spf13/pflag.Value
|
|
func (m *MapStringString) Set(value string) error {
|
|
if m.Map == nil {
|
|
return fmt.Errorf("no target (nil pointer to map[string]string)")
|
|
}
|
|
if !m.initialized || *m.Map == nil {
|
|
// clear default values, or allocate if no existing map
|
|
*m.Map = make(map[string]string)
|
|
m.initialized = true
|
|
}
|
|
|
|
// account for comma-separated key-value pairs in a single invocation
|
|
if !m.NoSplit {
|
|
for _, s := range strings.Split(value, ",") {
|
|
if len(s) == 0 {
|
|
continue
|
|
}
|
|
arr := strings.SplitN(s, "=", 2)
|
|
if len(arr) != 2 {
|
|
return fmt.Errorf("malformed pair, expect string=string")
|
|
}
|
|
k := strings.TrimSpace(arr[0])
|
|
v := strings.TrimSpace(arr[1])
|
|
(*m.Map)[k] = v
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// account for only one key-value pair in a single invocation
|
|
arr := strings.SplitN(value, "=", 2)
|
|
if len(arr) != 2 {
|
|
return fmt.Errorf("malformed pair, expect string=string")
|
|
}
|
|
k := strings.TrimSpace(arr[0])
|
|
v := strings.TrimSpace(arr[1])
|
|
(*m.Map)[k] = v
|
|
return nil
|
|
|
|
}
|
|
|
|
// Type implements github.com/spf13/pflag.Value
|
|
func (*MapStringString) Type() string {
|
|
return "mapStringString"
|
|
}
|
|
|
|
// Empty implements OmitEmpty
|
|
func (m *MapStringString) Empty() bool {
|
|
return len(*m.Map) == 0
|
|
}
|