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
|
package search
import (
"bytes"
"context"
"encoding/gob"
"log"
"os"
"path"
"searchix/internal/options"
"github.com/bcicen/jstream"
"github.com/blevesearch/bleve/v2"
"github.com/blevesearch/bleve/v2/analysis/analyzer/custom"
"github.com/blevesearch/bleve/v2/analysis/token/camelcase"
"github.com/blevesearch/bleve/v2/analysis/tokenizer/letter"
"github.com/blevesearch/bleve/v2/document"
index "github.com/blevesearch/bleve_index_api"
"github.com/mitchellh/mapstructure"
"github.com/pkg/errors"
)
const ResultsPerPage = 20
type Result[T options.NixOption] struct {
*bleve.SearchResult
Results []T
}
type Index[T options.NixOption] struct {
index bleve.Index
}
func New[T options.NixOption](kind string) (*Index[T], error) {
var err error
bleve.SetLog(log.Default())
indexMapping := bleve.NewIndexMapping()
textFieldMapping := bleve.NewTextFieldMapping()
textFieldMapping.Store = false
descriptionFieldMapping := bleve.NewTextFieldMapping()
descriptionFieldMapping.Store = false
descriptionFieldMapping.Analyzer = "web"
err = indexMapping.AddCustomAnalyzer("option_name", map[string]interface{}{
"type": custom.Name,
"tokenizer": letter.Name,
"token_filters": []string{
camelcase.Name,
},
})
if err != nil {
return nil, errors.WithMessage(err, "could not add custom analyser")
}
nameMapping := bleve.NewTextFieldMapping()
nameMapping.Analyzer = "option_name"
nameMapping.IncludeTermVectors = true
nameMapping.Store = false
nixValueMapping := bleve.NewDocumentStaticMapping()
nixValueMapping.AddFieldMappingsAt("Text", textFieldMapping)
nixValueMapping.AddFieldMappingsAt("Markdown", textFieldMapping)
optionMapping := bleve.NewDocumentStaticMapping()
optionMapping.AddFieldMappingsAt("Option", nameMapping)
optionMapping.AddFieldMappingsAt("Loc", bleve.NewKeywordFieldMapping())
optionMapping.AddFieldMappingsAt("RelatedPackages", textFieldMapping)
optionMapping.AddFieldMappingsAt("Description", textFieldMapping)
optionMapping.AddSubDocumentMapping("Default", nixValueMapping)
optionMapping.AddSubDocumentMapping("Example", nixValueMapping)
indexMapping.AddDocumentMapping("option", optionMapping)
idx, err := bleve.NewMemOnly(indexMapping)
// index, err = bleve.New(path.Join(cfg.DataPath, const indexFilename = "index.bleve"), indexMapping)
if err != nil {
return nil, errors.WithMessage(err, "error opening index")
}
batch := idx.NewBatch()
jsonFile, err := os.Open(path.Join("data", "processed", kind+".json"))
if err != nil {
return nil, errors.WithMessage(err, "error opening json file")
}
dec := jstream.NewDecoder(jsonFile, 1)
var opt options.NixOption
ms, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
ErrorUnused: true,
ZeroFields: true,
Result: &opt,
})
if err != nil {
return nil, errors.WithMessage(err, "could not create struct decoder")
}
for mv := range dec.Stream() {
opt = options.NixOption{}
orig := mv.Value.(map[string]interface{})
err := ms.Decode(orig) // stores in opt
if err != nil {
return nil, errors.WithMessagef(err, "could not decode value: %+v", orig)
}
doc := document.NewDocument(opt.Option)
err = indexMapping.MapDocument(doc, opt)
if err != nil {
return nil, errors.WithMessagef(err, "could not map document for option: %s", opt.Option)
}
var data bytes.Buffer
enc := gob.NewEncoder(&data)
err = enc.Encode(opt)
if err != nil {
return nil, errors.WithMessage(err, "could not store option in search index")
}
field := document.NewTextFieldWithIndexingOptions("data", nil, data.Bytes(), index.StoreField)
newDoc := doc.AddField(field)
err = batch.IndexAdvanced(newDoc)
if err != nil {
return nil, errors.WithMessagef(err, "could not index option %s", opt.Option)
}
}
err = idx.Batch(batch)
if err != nil {
return nil, errors.WithMessage(err, "failed to run batch index operation")
}
return &Index[T]{
idx,
}, nil
}
func (index *Index[T]) Search(ctx context.Context, keyword string, from uint64) (*Result[T], error) {
query := bleve.NewMatchQuery(keyword)
query.Analyzer = "option_name"
search := bleve.NewSearchRequest(query)
search.Size = ResultsPerPage
search.Fields = []string{"data"}
search.Explain = true
if from != 0 {
search.From = int(from)
}
bleveResult, err := index.index.SearchInContext(ctx, search)
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
if err != nil {
return nil, errors.WithMessage(err, "failed to execute search query")
}
results := make([]T, min(ResultsPerPage, bleveResult.Total))
for i, result := range bleveResult.Hits {
data := result.Fields["data"]
byt := bytes.NewBuffer([]byte(data.(string)))
dec := gob.NewDecoder(byt)
err := dec.Decode(&results[i])
if err != nil {
return nil, errors.WithMessagef(err, "error decoding gob data: %s", byt.String())
}
}
return &Result[T]{
bleveResult,
results,
}, nil
}
}
|