CODEWITHSUNDEEP
jsonenvironment-variablesshjq
Adarsh
Adarsh

Reputation: 227

Execute an export command created from a json using jq

I have an input json as below with the keys changing dynamically, the only static content in the key is the text '_GROUP_NAME' and '_VERSION'

[
    {
      "PREPROCESS_GROUP_NAME": "preprocess-group-name",
      "PREPROCESS_VERSION": 2
    },
    {
      "CLASSIFIER_GROUP_NAME": "classifier-group-name",
      "CLASSIFIER_VERSION": 2
    },
    {
      "ABC_GROUP_NAME": "abc-group-name",
      "ABC_VERSION": 2
    }
]

I want to export the key value pair as environment variables. Basically I want to read the json above and execute commands as

export PREPROCESS_GROUP_NAME='preprocess-group-name'
export PREPROCESS_VERSION=2
export CLASSIFIER_GROUP_NAME='classifier-group-name'
export CLASSIFIER_VERSION=2
export ABC_GROUP_NAME='abc-group-name'
export ABC_VERSION=2

I am looking for a solution which will create export commands based on dynamically generated keys and values.

Upvotes: 2

Views: 342

Answers (1)

peak
peak

Reputation: 116967

With your JSON as input,

jq -r '.[] | to_entries[] | "export \(.key)=\(.value|@sh)"'

produces:

export PREPROCESS_GROUP_NAME='preprocess-group-name'
export PREPROCESS_VERSION=2
export CLASSIFIER_GROUP_NAME='classifier-group-name'
export CLASSIFIER_VERSION=2

These commands can then be evaluated by the shell in whichever way you deem appropriate.

A possibly-safer alternative would be:

while read -r key ; do
    read -r value
    export "$key"="$value"
done < <(< input.json jq -r '.[] | to_entries[] | .key, .value')

Upvotes: 4

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