bool_slice.go (5321B)
1 package pflag 2 3 import ( 4 "io" 5 "strconv" 6 "strings" 7 ) 8 9 // -- boolSlice Value 10 type boolSliceValue struct { 11 value *[]bool 12 changed bool 13 } 14 15 func newBoolSliceValue(val []bool, p *[]bool) *boolSliceValue { 16 bsv := new(boolSliceValue) 17 bsv.value = p 18 *bsv.value = val 19 return bsv 20 } 21 22 // Set converts, and assigns, the comma-separated boolean argument string representation as the []bool value of this flag. 23 // If Set is called on a flag that already has a []bool assigned, the newly converted values will be appended. 24 func (s *boolSliceValue) Set(val string) error { 25 26 // remove all quote characters 27 rmQuote := strings.NewReplacer(`"`, "", `'`, "", "`", "") 28 29 // read flag arguments with CSV parser 30 boolStrSlice, err := readAsCSV(rmQuote.Replace(val)) 31 if err != nil && err != io.EOF { 32 return err 33 } 34 35 // parse boolean values into slice 36 out := make([]bool, 0, len(boolStrSlice)) 37 for _, boolStr := range boolStrSlice { 38 b, err := strconv.ParseBool(strings.TrimSpace(boolStr)) 39 if err != nil { 40 return err 41 } 42 out = append(out, b) 43 } 44 45 if !s.changed { 46 *s.value = out 47 } else { 48 *s.value = append(*s.value, out...) 49 } 50 51 s.changed = true 52 53 return nil 54 } 55 56 // Type returns a string that uniquely represents this flag's type. 57 func (s *boolSliceValue) Type() string { 58 return "boolSlice" 59 } 60 61 // String defines a "native" format for this boolean slice flag value. 62 func (s *boolSliceValue) String() string { 63 64 boolStrSlice := make([]string, len(*s.value)) 65 for i, b := range *s.value { 66 boolStrSlice[i] = strconv.FormatBool(b) 67 } 68 69 out, _ := writeAsCSV(boolStrSlice) 70 71 return "[" + out + "]" 72 } 73 74 func (s *boolSliceValue) fromString(val string) (bool, error) { 75 return strconv.ParseBool(val) 76 } 77 78 func (s *boolSliceValue) toString(val bool) string { 79 return strconv.FormatBool(val) 80 } 81 82 func (s *boolSliceValue) Append(val string) error { 83 i, err := s.fromString(val) 84 if err != nil { 85 return err 86 } 87 *s.value = append(*s.value, i) 88 return nil 89 } 90 91 func (s *boolSliceValue) Replace(val []string) error { 92 out := make([]bool, len(val)) 93 for i, d := range val { 94 var err error 95 out[i], err = s.fromString(d) 96 if err != nil { 97 return err 98 } 99 } 100 *s.value = out 101 return nil 102 } 103 104 func (s *boolSliceValue) GetSlice() []string { 105 out := make([]string, len(*s.value)) 106 for i, d := range *s.value { 107 out[i] = s.toString(d) 108 } 109 return out 110 } 111 112 func boolSliceConv(val string) (interface{}, error) { 113 val = strings.Trim(val, "[]") 114 // Empty string would cause a slice with one (empty) entry 115 if len(val) == 0 { 116 return []bool{}, nil 117 } 118 ss := strings.Split(val, ",") 119 out := make([]bool, len(ss)) 120 for i, t := range ss { 121 var err error 122 out[i], err = strconv.ParseBool(t) 123 if err != nil { 124 return nil, err 125 } 126 } 127 return out, nil 128 } 129 130 // GetBoolSlice returns the []bool value of a flag with the given name. 131 func (f *FlagSet) GetBoolSlice(name string) ([]bool, error) { 132 val, err := f.getFlagType(name, "boolSlice", boolSliceConv) 133 if err != nil { 134 return []bool{}, err 135 } 136 return val.([]bool), nil 137 } 138 139 // BoolSliceVar defines a boolSlice flag with specified name, default value, and usage string. 140 // The argument p points to a []bool variable in which to store the value of the flag. 141 func (f *FlagSet) BoolSliceVar(p *[]bool, name string, value []bool, usage string) { 142 f.VarP(newBoolSliceValue(value, p), name, "", usage) 143 } 144 145 // BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash. 146 func (f *FlagSet) BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) { 147 f.VarP(newBoolSliceValue(value, p), name, shorthand, usage) 148 } 149 150 // BoolSliceVar defines a []bool flag with specified name, default value, and usage string. 151 // The argument p points to a []bool variable in which to store the value of the flag. 152 func BoolSliceVar(p *[]bool, name string, value []bool, usage string) { 153 CommandLine.VarP(newBoolSliceValue(value, p), name, "", usage) 154 } 155 156 // BoolSliceVarP is like BoolSliceVar, but accepts a shorthand letter that can be used after a single dash. 157 func BoolSliceVarP(p *[]bool, name, shorthand string, value []bool, usage string) { 158 CommandLine.VarP(newBoolSliceValue(value, p), name, shorthand, usage) 159 } 160 161 // BoolSlice defines a []bool flag with specified name, default value, and usage string. 162 // The return value is the address of a []bool variable that stores the value of the flag. 163 func (f *FlagSet) BoolSlice(name string, value []bool, usage string) *[]bool { 164 p := []bool{} 165 f.BoolSliceVarP(&p, name, "", value, usage) 166 return &p 167 } 168 169 // BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash. 170 func (f *FlagSet) BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool { 171 p := []bool{} 172 f.BoolSliceVarP(&p, name, shorthand, value, usage) 173 return &p 174 } 175 176 // BoolSlice defines a []bool flag with specified name, default value, and usage string. 177 // The return value is the address of a []bool variable that stores the value of the flag. 178 func BoolSlice(name string, value []bool, usage string) *[]bool { 179 return CommandLine.BoolSliceP(name, "", value, usage) 180 } 181 182 // BoolSliceP is like BoolSlice, but accepts a shorthand letter that can be used after a single dash. 183 func BoolSliceP(name, shorthand string, value []bool, usage string) *[]bool { 184 return CommandLine.BoolSliceP(name, shorthand, value, usage) 185 }