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
93
94
95
96
97
98
99
100
|
diff --git a/cfg.go b/cfg.go
new file mode 100644
index 0000000000000000000000000000000000000000..c3d9612364a3f0ce2be9fc02ea1967631c588bf8
--- /dev/null
+++ b/cfg.go
@@ -0,0 +1,94 @@
+package cfg
+
+import (
+ "encoding/json"
+ "fmt"
+ "strings"
+
+ "github.com/pelletier/go-toml/v2"
+ "github.com/philandstuff/dhall-golang/v6"
+ "github.com/tailscale/hujson"
+ "go.jolheiser.com/nixfig"
+ "gopkg.in/yaml.v3"
+)
+
+// Encoding is a type of configuration encoding
+type Encoding string
+
+const (
+ JSON Encoding = "json"
+ JSONC Encoding = "jsonc"
+ YAML Encoding = "yaml"
+ TOML Encoding = "toml"
+ NIX Encoding = "nix"
+ DHALL Encoding = "dhall"
+)
+
+// Marshal takes data and encodes for an [Encoding]
+func (e Encoding) Marshal(v any) ([]byte, error) {
+ return Marshal(e, v)
+}
+
+// Unmarshal decodes data for an [Encoding]
+func (e Encoding) Unmarshal(data []byte, v any) error {
+ return Unmarshal(e, data, v)
+}
+
+// ParseEncoding parses a string into an [Encoding]
+func ParseEncoding(s string) (Encoding, error) {
+ switch strings.ToLower(s) {
+ case "json":
+ return JSON, nil
+ case "jsonc":
+ return JSONC, nil
+ case "yaml":
+ return YAML, nil
+ case "toml":
+ return TOML, nil
+ case "nix":
+ return NIX, nil
+ case "dhall":
+ return DHALL, nil
+ default:
+ return "", fmt.Errorf("unknown encoding %q", s)
+ }
+}
+
+// Marshal is a top-level helper for encoding data
+func Marshal(e Encoding, v any) ([]byte, error) {
+ switch e {
+ case JSON, JSONC:
+ return json.MarshalIndent(v, "", "\t")
+ case YAML:
+ return yaml.Marshal(v)
+ case TOML:
+ return toml.Marshal(v)
+ case NIX:
+ return nixfig.Marshal(v)
+ default:
+ return nil, fmt.Errorf("unknown marshal format %q", e)
+ }
+}
+
+// Unmarshal is a top-level helper for decoding data
+func Unmarshal(e Encoding, data []byte, v any) error {
+ switch e {
+ case JSON, JSONC:
+ b, err := hujson.Standardize(data)
+ if err != nil {
+ return err
+ }
+ return json.Unmarshal(b, v)
+ case YAML:
+ return yaml.Unmarshal(data, v)
+ case TOML:
+ return toml.Unmarshal(data, v)
+ case NIX:
+ return nixfig.Unmarshal(data, v)
+ case DHALL:
+ return dhall.Unmarshal(data, v)
+ default:
+ return fmt.Errorf("unknown unmarshal format %q", e)
+
+ }
+}
|