-
Notifications
You must be signed in to change notification settings - Fork 8
/
parsing.go
87 lines (68 loc) · 1.99 KB
/
parsing.go
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
// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package resources
import (
"bytes"
"encoding/json"
"fmt"
"os"
)
type Parsed struct {
resources map[string]any
}
func LoadResources() (*Parsed, error) {
configBytes, err := os.ReadFile("/namespace/config/resources.json")
if err != nil {
return nil, fmt.Errorf("failed to unwrap resource configuration: %w", err)
}
return ParseResourceData(configBytes)
}
func ParseResourceData(data []byte) (*Parsed, error) {
dec := json.NewDecoder(bytes.NewReader(data))
tok, err := dec.Token()
if err == nil && tok != json.Delim('{') {
err = fmt.Errorf("expected an object, got %v", tok)
}
if err != nil {
return nil, fmt.Errorf("bad resource data: %w", err)
}
resources := map[string]any{}
for dec.More() {
label, err := dec.Token()
if err != nil {
return nil, fmt.Errorf("bad resource data: %w", err)
}
strLabel, ok := label.(string)
if !ok {
return nil, fmt.Errorf("bad resource data, expected label: %w", err)
}
var raw any
if err := dec.Decode(&raw); err != nil {
return nil, fmt.Errorf("bad resource data: failed to decode: %w", err)
}
resources[strLabel] = raw
}
finalTok, err := dec.Token()
if err == nil && finalTok != json.Delim('}') {
err = fmt.Errorf("expected object closure, got %v", finalTok)
}
if err != nil {
return nil, fmt.Errorf("bad resource data: %w", err)
}
return &Parsed{resources: resources}, nil
}
func (p *Parsed) Unmarshal(resource string, out any) error {
raw, ok := p.resources[resource]
if !ok {
return fmt.Errorf("no resource config found for resource %q", resource)
}
data, err := json.Marshal(raw)
if err != nil {
return fmt.Errorf("%s: failed to re-marshal value: %w", resource, err)
}
if err := json.Unmarshal(data, out); err != nil {
return fmt.Errorf("%s: failed to unmarshal resource: %w", resource, err)
}
return nil
}