Simple CSV2JSON

#!/bin/bash

#cat alunos.txt
#Nome;turma;periodo
#Zé das cove;a2;matutino
#Tião;d3;vespertino
#Mariazinha;w1;matutino
#Leo;k9;noturno


jsonObjPatern="{"$(head -n 1 alunos.txt | sed  's/[;]/,/g')"}"

IFS=";" read -ra fields <<< "$(head -n 1 alunos.txt)"

numberOfElements=${#fields[@]}

while read csvLine; do

    IFS=";" read -ra values <<< $(echo $csvLine)

    asdfgh=0

    obj=$jsonObjPatern

    while [ ${asdfgh:-0} -lt ${numberOfElements:-0} ]; do

        qwerty=${fields[$asdfgh]}

        zxcvbn=${fields[$asdfgh]}":"${values[$asdfgh]}

        obj=${obj/$qwerty/$zxcvbn}

        asdfgh=$(($asdfgh+1))

    done

    jsonObj=$jsonObj$obj","

done <<< $(cat alunos.txt | sed -n '1!p')

echo $jsonObj