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package pflag
import (
"bytes"
"encoding/csv"
"fmt"
"strings"
)
// -- stringToString Value
type 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=2
func (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 name
func (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 comma
func (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 comma
func 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 comma
func (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 comma
func 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)
}
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