Build a JSON string with Bash variables

Question

I need to read these bash variables into my JSON string and I am not familiar with bash. any help is appreciated.

#!/bin/sh

BUCKET_NAME=testbucket
OBJECT_N         


        

Answer 1

You could use envsubst:

  export VAR="some_value_here"
  echo '{"test":"$VAR"}' | envsubst > json.json

also it might be a "template" file:

//json.template
{"var": "$VALUE", "another_var":"$ANOTHER_VALUE"}

So after you could do:

export VALUE="some_value_here"
export ANOTHER_VALUE="something_else"
cat  json.template | envsubst > misha.json