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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
package importer
import (
"context"
"io"
"log/slog"
"reflect"
"searchix/internal/config"
"searchix/internal/nix"
"github.com/bcicen/jstream"
"github.com/mitchellh/mapstructure"
"github.com/pkg/errors"
)
type nixValueJSON struct {
Type string `mapstructure:"_type"`
Text string
}
type linkJSON struct {
Name string
URL string `json:"url"`
}
type nixOptionJSON struct {
Declarations []linkJSON
Default *nixValueJSON
Description string
Example *nixValueJSON
Loc []string
ReadOnly bool
RelatedPackages string
Type string
}
func convertValue(nj *nixValueJSON) *nix.Value {
if nj == nil {
return nil
}
switch nj.Type {
case "", "literalExpression":
return &nix.Value{
Text: nj.Text,
}
case "literalMD":
return &nix.Value{
Markdown: nix.Markdown(nj.Text),
}
default:
slog.Warn("got unexpected Value type", "type", nj.Type, "text", nj.Text)
return nil
}
}
type OptionIngester struct {
dec *jstream.Decoder
ms *mapstructure.Decoder
optJSON nixOptionJSON
infile io.ReadCloser
source *config.Source
}
func NewOptionProcessor(infile io.ReadCloser, source *config.Source) (*OptionIngester, error) {
i := OptionIngester{
dec: jstream.NewDecoder(infile, 1).EmitKV(),
optJSON: nixOptionJSON{},
infile: infile,
source: source,
}
ms, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
ErrorUnused: true,
ZeroFields: true,
Result: &i.optJSON,
Squash: true,
DecodeHook: mapstructure.TextUnmarshallerHookFunc(),
})
if err != nil {
defer infile.Close()
return nil, errors.WithMessage(err, "could not create mapstructure decoder")
}
i.ms = ms
return &i, nil
}
func (i *OptionIngester) Process(parent context.Context) (<-chan nix.Importable, <-chan error) {
ctx, cancel := context.WithTimeout(parent, i.source.ImportTimeout.Duration)
results := make(chan nix.Importable)
errs := make(chan error)
go func() {
defer i.infile.Close()
defer close(results)
defer close(errs)
defer cancel()
outer:
for mv := range i.dec.Stream() {
select {
case <-ctx.Done():
break outer
default:
}
if err := i.dec.Err(); err != nil {
errs <- errors.WithMessage(err, "could not decode JSON")
continue
}
if mv.ValueType != jstream.Object {
errs <- errors.Errorf("unexpected object type %s", ValueTypeToString(mv.ValueType))
continue
}
kv := mv.Value.(jstream.KV)
x := kv.Value.(map[string]interface{})
var decls []*nix.Link
for _, decl := range x["declarations"].([]interface{}) {
switch decl := reflect.ValueOf(decl); decl.Kind() {
case reflect.String:
s := decl.String()
link, err := MakeChannelLink(i.source.Repo, s)
if err != nil {
errs <- errors.WithMessagef(err,
"could not make a channel link for channel %s, revision %s and subpath %s",
i.source.Channel, i.source.Repo.Revision, s,
)
continue
}
decls = append(decls, link)
case reflect.Map:
v := decl.Interface().(map[string]interface{})
link := nix.Link{
Name: v["name"].(string),
URL: v["url"].(string),
}
decls = append(decls, &link)
default:
errs <- errors.Errorf("unexpected declaration type %s", decl.Kind().String())
continue
}
}
if len(decls) > 0 {
x["declarations"] = decls
}
i.optJSON = nixOptionJSON{}
err := i.ms.Decode(x) // stores in optJSON
if err != nil {
errs <- errors.WithMessagef(err, "failed to decode option %#v", x)
continue
}
var decs = make([]nix.Link, len(i.optJSON.Declarations))
for i, d := range i.optJSON.Declarations {
decs[i] = nix.Link(d)
}
// slog.Debug("sending option", "name", kv.Key)
results <- nix.Option{
Name: kv.Key,
Source: i.source.Key,
Declarations: decs,
Default: convertValue(i.optJSON.Default),
Description: nix.Markdown(i.optJSON.Description),
Example: convertValue(i.optJSON.Example),
RelatedPackages: nix.Markdown(i.optJSON.RelatedPackages),
Loc: i.optJSON.Loc,
Type: i.optJSON.Type,
}
}
}()
return results, errs
}
|