1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
package dasel
import (
"fmt"
"reflect"
"strconv"
"strings"
)
type ErrIndexNotFound struct {
Index int
}
func (e ErrIndexNotFound) Error() string {
return fmt.Sprintf("index not found: %d", e.Index)
}
func (e ErrIndexNotFound) Is(other error) bool {
o, ok := other.(*ErrIndexNotFound)
if !ok {
return false
}
if o.Index >= 0 && o.Index != e.Index {
return false
}
return true
}
var IndexFunc = BasicFunction{
name: "index",
runFn: func(c *Context, s *Step, args []string) (Values, error) {
if err := requireXOrMoreArgs("index", args, 1); err != nil {
return nil, err
}
input := s.inputs()
res := make(Values, 0)
for _, val := range input {
for _, indexStr := range args {
isOptional := strings.HasSuffix(indexStr, "?")
if isOptional {
indexStr = strings.TrimSuffix(indexStr, "?")
}
index, err := strconv.Atoi(indexStr)
if err != nil {
if isOptional {
continue
}
return nil, fmt.Errorf("invalid index: %w", err)
}
switch val.Kind() {
case reflect.String:
runes := []rune(val.String())
if index < 0 || index > len(runes)-1 {
if isOptional {
continue
}
return nil, fmt.Errorf("index out of range: %w", &ErrIndexNotFound{Index: index})
}
res = append(res, ValueOf(string(runes[index])))
case reflect.Slice, reflect.Array:
if index < 0 || index > val.Len()-1 {
if isOptional {
continue
}
return nil, fmt.Errorf("index out of range: %w", &ErrIndexNotFound{Index: index})
}
value := val.Index(index)
res = append(res, value)
default:
return nil, fmt.Errorf("cannot use index selector on non slice/array types: %w", &ErrIndexNotFound{Index: index})
}
}
}
return res, nil
},
alternativeSelectorFn: func(part string) *Selector {
if part != "[]" && strings.HasPrefix(part, "[") && strings.HasSuffix(part, "]") {
strings.Split(strings.TrimPrefix(strings.TrimSuffix(part, "]"), "["), ",")
return &Selector{
funcName: "index",
funcArgs: strings.Split(strings.TrimPrefix(strings.TrimSuffix(part, "]"), "["), ","),
}
}
return nil
},
}
|
