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