main.go


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package main

import (
	"encoding/csv"
	"encoding/json"
	"flag"
	"fmt"
	"io"
	"os"
)

var out = os.Stdout

func main() {
	flag.Parse()
	r := csv.NewReader(os.Stdin)
	r.TrimLeadingSpace = true
	n := -1
	var columns []string
	out.Write([]byte("["))
	for {
		n++
		d, err := r.Read()
		if err != nil {
			if err == io.EOF {
				break
			}
			fmt.Fprintln(os.Stderr, err.Error())
			os.Exit(1)
		}
		if n == 0 {
			if len(d) == 0 {
				os.Exit(1)
			}
			columns = d
			continue
		} else if n > 1 {
			out.Write([]byte(","))
			out.Write([]byte("\n"))
		}
		m := make(map[string]string)
		for i, v := range d {
			if i > len(columns)-1 {
				break
			}
			m[columns[i]] = v
		}
		j, err := json.Marshal(m)
		if err != nil {
			fmt.Fprintln(os.Stderr, err.Error())
			os.Exit(1)
		}
		out.Write(j)
	}
	out.Write([]byte("]"))
	out.Write([]byte("\n"))
}