1 package pflag

     2 

     3 import (

     4 	"fmt"

     5 	"strings"

     6 	"time"

     7 )

     8 

     9 // -- durationSlice Value

    10 type durationSliceValue struct {

    11 	value   *[]time.Duration

    12 	changed bool

    13 }

    14 

    15 func newDurationSliceValue(val []time.Duration, p *[]time.Duration) *durationSliceValue {

    16 	dsv := new(durationSliceValue)

    17 	dsv.value = p

    18 	*dsv.value = val

    19 	return dsv

    20 }

    21 

    22 func (s *durationSliceValue) Set(val string) error {

    23 	ss := strings.Split(val, ",")

    24 	out := make([]time.Duration, len(ss))

    25 	for i, d := range ss {

    26 		var err error

    27 		out[i], err = time.ParseDuration(d)

    28 		if err != nil {

    29 			return err

    30 		}

    31 

    32 	}

    33 	if !s.changed {

    34 		*s.value = out

    35 	} else {

    36 		*s.value = append(*s.value, out...)

    37 	}

    38 	s.changed = true

    39 	return nil

    40 }

    41 

    42 func (s *durationSliceValue) Type() string {

    43 	return "durationSlice"

    44 }

    45 

    46 func (s *durationSliceValue) String() string {

    47 	out := make([]string, len(*s.value))

    48 	for i, d := range *s.value {

    49 		out[i] = fmt.Sprintf("%s", d)

    50 	}

    51 	return "[" + strings.Join(out, ",") + "]"

    52 }

    53 

    54 func durationSliceConv(val string) (interface{}, error) {

    55 	val = strings.Trim(val, "[]")

    56 	// Empty string would cause a slice with one (empty) entry

    57 	if len(val) == 0 {

    58 		return []time.Duration{}, nil

    59 	}

    60 	ss := strings.Split(val, ",")

    61 	out := make([]time.Duration, len(ss))

    62 	for i, d := range ss {

    63 		var err error

    64 		out[i], err = time.ParseDuration(d)

    65 		if err != nil {

    66 			return nil, err

    67 		}

    68 

    69 	}

    70 	return out, nil

    71 }

    72 

    73 // GetDurationSlice returns the []time.Duration value of a flag with the given name

    74 func (f *FlagSet) GetDurationSlice(name string) ([]time.Duration, error) {

    75 	val, err := f.getFlagType(name, "durationSlice", durationSliceConv)

    76 	if err != nil {

    77 		return []time.Duration{}, err

    78 	}

    79 	return val.([]time.Duration), nil

    80 }

    81 

    82 // DurationSliceVar defines a durationSlice flag with specified name, default value, and usage string.

    83 // The argument p points to a []time.Duration variable in which to store the value of the flag.

    84 func (f *FlagSet) DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {

    85 	f.VarP(newDurationSliceValue(value, p), name, "", usage)

    86 }

    87 

    88 // DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.

    89 func (f *FlagSet) DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {

    90 	f.VarP(newDurationSliceValue(value, p), name, shorthand, usage)

    91 }

    92 

    93 // DurationSliceVar defines a duration[] flag with specified name, default value, and usage string.

    94 // The argument p points to a duration[] variable in which to store the value of the flag.

    95 func DurationSliceVar(p *[]time.Duration, name string, value []time.Duration, usage string) {

    96 	CommandLine.VarP(newDurationSliceValue(value, p), name, "", usage)

    97 }

    98 

    99 // DurationSliceVarP is like DurationSliceVar, but accepts a shorthand letter that can be used after a single dash.

   100 func DurationSliceVarP(p *[]time.Duration, name, shorthand string, value []time.Duration, usage string) {

   101 	CommandLine.VarP(newDurationSliceValue(value, p), name, shorthand, usage)

   102 }

   103 

   104 // DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.

   105 // The return value is the address of a []time.Duration variable that stores the value of the flag.

   106 func (f *FlagSet) DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {

   107 	p := []time.Duration{}

   108 	f.DurationSliceVarP(&p, name, "", value, usage)

   109 	return &p

   110 }

   111 

   112 // DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.

   113 func (f *FlagSet) DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {

   114 	p := []time.Duration{}

   115 	f.DurationSliceVarP(&p, name, shorthand, value, usage)

   116 	return &p

   117 }

   118 

   119 // DurationSlice defines a []time.Duration flag with specified name, default value, and usage string.

   120 // The return value is the address of a []time.Duration variable that stores the value of the flag.

   121 func DurationSlice(name string, value []time.Duration, usage string) *[]time.Duration {

   122 	return CommandLine.DurationSliceP(name, "", value, usage)

   123 }

   124 

   125 // DurationSliceP is like DurationSlice, but accepts a shorthand letter that can be used after a single dash.

   126 func DurationSliceP(name, shorthand string, value []time.Duration, usage string) *[]time.Duration {

   127 	return CommandLine.DurationSliceP(name, shorthand, value, usage)

   128 }