Create JSON object map from environment variables.md

Query: jq - Create JSON object map from environment variables

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I am using jq 1.5 and trying to pass two environment variables via jq to create a json object:

export REGIONS="region1,region2"
export KMS_KEYS="key1,key2"

test.json

{
    "builders": [
    {
      "name": "aws"
    }
  ]
}

using the following command:

jq --arg regions $REGIONS --arg kmskeys $KMS_KEYS '.builders[].region_kms_key_ids={$regions}' test.json

current outcome:

{
  "builders": [
    {
      "name": "aws",
      "region_kms_key_ids": {
        "regions": "region1,region2"
      }
    }
  ]
}

desired outcome:

{
    "builders": [
    {
      "name": "aws",
      "region_kms_key_ids": {
        "region1": "key1",
        "region2": "key2"
      }
    }
  ]
}

I'm stuck on how to use my REGIONS variable content as the keys and KMS_KEYS variable as the values. Any advice would be appreciated

A:

jtc accepts as input only JSON values, so, once the env variables declared as valid JSONs, the solution becomes feasible:

bash $ export REGIONS='["region1","region2"]'
bash $ export KMS_KEYS='["key1","key2"]'
bash $ 
bash $ <<<$REGIONS jtc -w'[:]<R>v' -mu"$KMS_KEYS" -u[:] -T'{"{R}":{{}}}' /\
                       -llw[:] /\
                       -w'<J>v' -u test.json /\
                       -w[builders][0] -i0 -T'{"region_kms_key_ids":{{J}}}'
{
   "builders": [
      {
         "name": "aws",
         "region_kms_key_ids": {
            "region1": "key1",
            "region2": "key2"
         }
      }
   ]
}
bash $