Generate nested JSON using array elements as keys

Question

I have a file with the below contents and a shell variable with some keys. I want to create nested JSON using all keys. eg:

file.json:
{
    "name":"..",
    "value":".."
}

shell variable which contains list of keys:

values=('one' 'two' 'three')

I want to create a variable like below:

{
   "all":{
        "one":  {
            "name":"..",
            "value":".."
        },
        "two":  {
            "name":"..",
            "value":".."
        },
        "three":  {
            "name":"..",
            "value":".."
        }
   }
}

I tried to pass the values are --arg to JQ, but it didnt work. JQ version: 1.5.

oguz ismail · Accepted Answer · 2020-03-19 06:25:47Z

2

Newer versions of JQ populates an internal array ($ARGS.positional) with arguments given after --args on command-line, you can use it.

jq '{all: [{($ARGS.positional[]): .}] | add}' file --args "${values[@]}"

On older versions, you can use this approach:

printf '"%s"\n' "${values[@]}" |
    jq '{all: [{(inputs): .}] | add}' file -

But note that this is not as reliable as the above one, I highly recommend updating JQ.

edited Mar 19, 2020 at 6:25

answered Mar 18, 2020 at 16:01

oguz ismail

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