Execute graphQL query or mutation with cURL escaping JSON characters using jq

graphql.sh

# usage from another script:
# source /path/to/graphql.sh
# graphql http://localhost:8080/graphql "$SOME_QUERY_OR_MUTATION"
# where $SOME_QUERY_OR_MUTATION is the raw query or mutation, with quotes, new lines etc.

require() {
    command -v "$1" >/dev/null 2>&1 || { echo >&2 "$1 program is required"; exit 1; } 
}

graphql() {
    require curl
    require jq
    QUERY=$(jq -aRs . <<< "$2")
    curl -H "Content-Type: application/json" "$1" -d "{\"query\": ${QUERY}}" | jq .
}