add csv2json.go to converta csv with headers to jsonlines

tools/go/csv2json/csv2json.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"encoding/csv"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"os"
+)
+
+func csvToJson(inputSource *os.File) {
+	csvReader := csv.NewReader(inputSource)
+	headers, err := csvReader.Read()
+	if err != nil {
+		log.Fatal("Failed to read headers: ", err)
+	}
+	for {
+		record, err := csvReader.Read()
+		if err != nil {
+			if err.Error() == "EOF" {
+				break
+			}
+			log.Fatal("Failed to read the data: ", err)
+		}
+		if len(record) == len(headers) {
+			jsonData := make(map[string]string)
+			for i, value := range record {
+				jsonData[headers[i]] = value
+			}
+			jsonOutput, err := json.Marshal(jsonData)
+			if err != nil {
+				log.Fatal("Failed to convert to json: ", err)
+			}
+			fmt.Println(string(jsonOutput))
+		} else {
+			log.Fatal("The number of columns in the record is not equal to the number of headers")
+		}
+	}
+
+}
+
+func main() {
+	inputSource := os.Stdin
+	flag.Parse()
+	var err error
+	if flag.NArg() > 0 {
+		inputSource, err = os.Open(flag.Args()[0])
+		if err != nil {
+			log.Fatalf("Failed to open file: %v\n", err)
+		}
+		defer inputSource.Close()
+	}
+	csvToJson(inputSource)
+
+}