Exporting JSON to environment variables

Using command substitution $() :

# $(jq -r 'keys[] as $k | "export \($k)=\(.[$k])"' file.json)
# echo $testk
testv

Edit : Responding to this comment

You should do

$( echo "$values" | jq -r 'keys[] as $k | "export \($k)=\(.[$k])"' )

Just mind the double quotes around $values

^{Note: Couldn't confirm if there is security implication to this approach, that is if the user could manipulate the json to wreak havoc.}

Borrowing from this answer which does all of the hard work of turning the JSON into key=value pairs, you could get these into the environment by looping over the jq output and exporting them:

for s in $(echo $values | jq -r "to_entries|map(\"\(.key)=\(.value|tostring)\")|.[]" ); do
    export $s
done

If the variables being loaded contain embedded whitespace, this is also reasonable, if slightly more complex:

while read -rd $'' line
do
    export "$line"
done < <(jq -r <<<"$values" \
         'to_entries|map("\(.key)=\(.value)\u0000")[]')