package pflag import (	"bytes"	"encoding/csv"	"fmt"	"strings") // -- stringToString Valuetype stringToStringValue struct {	value   *map[string]string	changed bool} func newStringToStringValue(val map[string]string, p *map[string]string) *stringToStringValue {	ssv := new(stringToStringValue)	ssv.value = p	*ssv.value = val	return ssv} // Format: a=1,b=2func (s *stringToStringValue) Set(val string) error {	var ss []string	n := strings.Count(val, "=")	switch n {	case 0:		return fmt.Errorf("%s must be formatted as key=value", val)	case 1:		ss = append(ss, strings.Trim(val, `"`))	default:		r := csv.NewReader(strings.NewReader(val))		var err error		ss, err = r.Read()		if err != nil {			return err		}	} 	out := make(map[string]string, len(ss))	for _, pair := range ss {		kv := strings.SplitN(pair, "=", 2)		if len(kv) != 2 {			return fmt.Errorf("%s must be formatted as key=value", pair)		}		out[kv[0]] = kv[1]	}	if !s.changed {		*s.value = out	} else {		for k, v := range out {			(*s.value)[k] = v		}	}	s.changed = true	return nil} func (s *stringToStringValue) Type() string {	return "stringToString"} func (s *stringToStringValue) String() string {	records := make([]string, 0, len(*s.value)>>1)	for k, v := range *s.value {		records = append(records, k+"="+v)	} 	var buf bytes.Buffer	w := csv.NewWriter(&buf)	if err := w.Write(records); err != nil {		panic(err)	}	w.Flush()	return "[" + strings.TrimSpace(buf.String()) + "]"} func stringToStringConv(val string) (interface{}, error) {	val = strings.Trim(val, "[]")	// An empty string would cause an empty map	if len(val) == 0 {		return map[string]string{}, nil	}	r := csv.NewReader(strings.NewReader(val))	ss, err := r.Read()	if err != nil {		return nil, err	}	out := make(map[string]string, len(ss))	for _, pair := range ss {		kv := strings.SplitN(pair, "=", 2)		if len(kv) != 2 {			return nil, fmt.Errorf("%s must be formatted as key=value", pair)		}		out[kv[0]] = kv[1]	}	return out, nil} // GetStringToString return the map[string]string value of a flag with the given namefunc (f *FlagSet) GetStringToString(name string) (map[string]string, error) {	val, err := f.getFlagType(name, "stringToString", stringToStringConv)	if err != nil {		return map[string]string{}, err	}	return val.(map[string]string), nil} // StringToStringVar defines a string flag with specified name, default value, and usage string.// The argument p points to a map[string]string variable in which to store the values of the multiple flags.// The value of each argument will not try to be separated by commafunc (f *FlagSet) StringToStringVar(p *map[string]string, name string, value map[string]string, usage string) {	f.VarP(newStringToStringValue(value, p), name, "", usage)} // StringToStringVarP is like StringToStringVar, but accepts a shorthand letter that can be used after a single dash.func (f *FlagSet) StringToStringVarP(p *map[string]string, name, shorthand string, value map[string]string, usage string) {	f.VarP(newStringToStringValue(value, p), name, shorthand, usage)} // StringToStringVar defines a string flag with specified name, default value, and usage string.// The argument p points to a map[string]string variable in which to store the value of the flag.// The value of each argument will not try to be separated by commafunc StringToStringVar(p *map[string]string, name string, value map[string]string, usage string) {	CommandLine.VarP(newStringToStringValue(value, p), name, "", usage)} // StringToStringVarP is like StringToStringVar, but accepts a shorthand letter that can be used after a single dash.func StringToStringVarP(p *map[string]string, name, shorthand string, value map[string]string, usage string) {	CommandLine.VarP(newStringToStringValue(value, p), name, shorthand, usage)} // StringToString defines a string flag with specified name, default value, and usage string.// The return value is the address of a map[string]string variable that stores the value of the flag.// The value of each argument will not try to be separated by commafunc (f *FlagSet) StringToString(name string, value map[string]string, usage string) *map[string]string {	p := map[string]string{}	f.StringToStringVarP(&p, name, "", value, usage)	return &p} // StringToStringP is like StringToString, but accepts a shorthand letter that can be used after a single dash.func (f *FlagSet) StringToStringP(name, shorthand string, value map[string]string, usage string) *map[string]string {	p := map[string]string{}	f.StringToStringVarP(&p, name, shorthand, value, usage)	return &p} // StringToString defines a string flag with specified name, default value, and usage string.// The return value is the address of a map[string]string variable that stores the value of the flag.// The value of each argument will not try to be separated by commafunc StringToString(name string, value map[string]string, usage string) *map[string]string {	return CommandLine.StringToStringP(name, "", value, usage)} // StringToStringP is like StringToString, but accepts a shorthand letter that can be used after a single dash.func StringToStringP(name, shorthand string, value map[string]string, usage string) *map[string]string {	return CommandLine.StringToStringP(name, shorthand, value, usage)}