example of how to index and search a directory of text files using bleve

bleve_txt.go

package main

import (
	"fmt"
	"log"
	"os"
	"path"

	"github.com/blevesearch/bleve/v2"
)

const myDir = "some/dir/path"
const myQuery = "lorem ipsum"

func main() {
	index, err := bleve.NewMemOnly(bleve.NewIndexMapping())
	if err != nil {
		log.Fatal(err)
	}

	fsd, err := os.ReadDir(myDir)
	if err != nil {
		log.Fatal(err)
	}

	for _, f := range fsd {
		if f.IsDir() {
			continue
		}
		index.Index(f.Name(), func(name string) string {
			f, err := os.ReadFile(path.Join(myDir, name))
			if err != nil {
				return ""
			}
			return string(f)
		}(f.Name()))
	}

	res, err := index.Search(bleve.NewSearchRequest(bleve.NewMatchQuery(myQuery)))
	if err != nil {
		fmt.Println(err)
		return
	}

	fmt.Println(res)
	for _, hit := range res.Hits {
		fmt.Printf("- %s (score: %f)\n", hit.ID, hit.Score)
	}
}