How to have a good json format in Bash? - json

Question

I have a script wherein when I get the value I will going to output them in a json format.
Below is my script:
#!/bin/bash
if
[ "$(egrep -l 'TR.834' /home/user/for_test_dir/*) " ];
then
egrep -l 'TR.834' /home/user/for_test_dir/* > /tmp/outbound.txt
chmod 777 /tmp/result.txt
#json_File=~/outboundFile.json
info_template='
{
"date" : "%s",
"time" : "%s",
"type" : "%s",
"num" : "%s"
},\n'
echo '{' #>> $json_File
echo -e '\t"List": {' #>> $json_File
echo -e '\t\t"Data" : [' #>> $json_File
a=1
while read LINE
do
fullpath[$a]=$LINE
filename[$a]=`basename $LINE`
cat $LINE | awk '{gsub("-",RS);print}' > /tmp/temp2.txt
chmod 777 /tmp/temp2.txt
cat /tmp/temp2.txt | awk '{gsub("*",RS);print}' > /tmp/temp.txt
chmod 777 /tmp/temp.txt
DATE[$a]=`sed -n '10p' < /tmp/temp.txt`
TIME[$a]=`sed -n '11p' < /tmp/temp.txt`
TYPE[$a]=`sed -n '28p' < /tmp/temp.txt`
NUM[$a]=`grep -oP 'BEN.\K[A-Z0-9_-\s]*' < /tmp/temp2.txt | awk '{ printf "%s,", $0 }'| sed 's/,\+$//' | awk '!x[$0]++'`
printf "$template" "${DATE[$a]}"\
"${TIME[$a]}"\
"${TYPE[$a]}"\
"${num[$a]}" #>> $json_File
done < /tmp/result.txt
fi
echo -e "\t\t]" #>> $json_File
echo -e "\t}" #>> $json_File
echo -e "}" #>> $json_File
My problem here is when I extract more than one data. Like for example, "NUM": "3232", "232343", "23345",
and my expected output for this would be like this:
"NUM" : [
"3232",
"232343",
"23345"
]
For single-data, "NUM" : "23234" (format would be as is). Badly need your help.

Answer 1

echo '{ "NUM": "3232", "232343", "23345" }' | python -m json.tool
or
sudo gem install json
echo '{ "NUM": "3232", "232343", "23345" }' | prettify_json.rb