1package pflag
2
3import (
4	"encoding/csv"
5	"fmt"
6	"strings"
7)
8
9var _ = fmt.Fprint
10
11// -- stringSlice Value
12type stringSliceValue struct {
13	value   *[]string
14	changed bool
15}
16
17func newStringSliceValue(val []string, p *[]string) *stringSliceValue {
18	ssv := new(stringSliceValue)
19	ssv.value = p
20	*ssv.value = val
21	return ssv
22}
23
24func (s *stringSliceValue) Set(val string) error {
25	stringReader := strings.NewReader(val)
26	csvReader := csv.NewReader(stringReader)
27	v, err := csvReader.Read()
28	if err != nil {
29		return err
30	}
31	if !s.changed {
32		*s.value = v
33	} else {
34		*s.value = append(*s.value, v...)
35	}
36	s.changed = true
37	return nil
38}
39
40func (s *stringSliceValue) Type() string {
41	return "stringSlice"
42}
43
44func (s *stringSliceValue) String() string { return "[" + strings.Join(*s.value, ",") + "]" }
45
46func stringSliceConv(sval string) (interface{}, error) {
47	sval = strings.Trim(sval, "[]")
48	// An empty string would cause a slice with one (empty) string
49	if len(sval) == 0 {
50		return []string{}, nil
51	}
52	v := strings.Split(sval, ",")
53	return v, nil
54}
55
56// GetStringSlice return the []string value of a flag with the given name
57func (f *FlagSet) GetStringSlice(name string) ([]string, error) {
58	val, err := f.getFlagType(name, "stringSlice", stringSliceConv)
59	if err != nil {
60		return []string{}, err
61	}
62	return val.([]string), nil
63}
64
65// StringSliceVar defines a string flag with specified name, default value, and usage string.
66// The argument p points to a []string variable in which to store the value of the flag.
67func (f *FlagSet) StringSliceVar(p *[]string, name string, value []string, usage string) {
68	f.VarP(newStringSliceValue(value, p), name, "", usage)
69}
70
71// StringSliceVarP is like StringSliceVar, but accepts a shorthand letter that can be used after a single dash.
72func (f *FlagSet) StringSliceVarP(p *[]string, name, shorthand string, value []string, usage string) {
73	f.VarP(newStringSliceValue(value, p), name, shorthand, usage)
74}
75
76// StringSliceVar defines a string flag with specified name, default value, and usage string.
77// The argument p points to a []string variable in which to store the value of the flag.
78func StringSliceVar(p *[]string, name string, value []string, usage string) {
79	CommandLine.VarP(newStringSliceValue(value, p), name, "", usage)
80}
81
82// StringSliceVarP is like StringSliceVar, but accepts a shorthand letter that can be used after a single dash.
83func StringSliceVarP(p *[]string, name, shorthand string, value []string, usage string) {
84	CommandLine.VarP(newStringSliceValue(value, p), name, shorthand, usage)
85}
86
87// StringSlice defines a string flag with specified name, default value, and usage string.
88// The return value is the address of a []string variable that stores the value of the flag.
89func (f *FlagSet) StringSlice(name string, value []string, usage string) *[]string {
90	p := []string{}
91	f.StringSliceVarP(&p, name, "", value, usage)
92	return &p
93}
94
95// StringSliceP is like StringSlice, but accepts a shorthand letter that can be used after a single dash.
96func (f *FlagSet) StringSliceP(name, shorthand string, value []string, usage string) *[]string {
97	p := []string{}
98	f.StringSliceVarP(&p, name, shorthand, value, usage)
99	return &p
100}
101
102// StringSlice defines a string flag with specified name, default value, and usage string.
103// The return value is the address of a []string variable that stores the value of the flag.
104func StringSlice(name string, value []string, usage string) *[]string {
105	return CommandLine.StringSliceP(name, "", value, usage)
106}
107
108// StringSliceP is like StringSlice, but accepts a shorthand letter that can be used after a single dash.
109func StringSliceP(name, shorthand string, value []string, usage string) *[]string {
110	return CommandLine.StringSliceP(name, shorthand, value, usage)
111}
112