Generate Karabiner-Elements' json file for import from Goku edn file

generate_json.sh

#! /usr/bin/env bash
set -e -u -o pipefail

#Usage
usage="Usage: ./generate_json.sh [options] <edn_config_file> <rule_title>"

show_help() {
cat << EOF
$usage

  Generate Karabiner-Elements' json file for import from Goku edn file
      -h    Display this help and exit.
      -n    No jq: just run 'goku --dry-run-all' and output the whole karabiner.json
            -O option will be ignored if this option is specified
      -O    Write the generated json file to the output directory (overwrite)
            The filepath will be "$HOME/.config/karabiner/assets/complex_modifications/<rule_tile>.json"
      -p    Specify profile name (if not specified, the profile named 'Default' will be used)
EOF
}

# Defaults
no_jq=false
write_file=false
output_dir="$HOME/.config/karabiner/assets/complex_modifications/"
profile="Default"

# Parse options
OPTIND=1
while getopts "hnOp:" opt; do
    case "$opt" in
        "h") show_help; exit 0;;
        "n") no_jq=true;;
        "O") write_file=true;;
        "p") profile=$OPTARG;;
    esac
done
shift $(($OPTIND - 1))


# Check arguments
[[ $# -lt 2 ]] && { show_help; exit 1; }

edn_file=${1}
[[ ! -f "$edn_file" ]] && { printf "No such file: %s\n" "$edn_file"; exit 1; }
title=${2}


# Main
export GOKU_EDN_CONFIG_FILE="$edn_file"
output_file=$(printf "%s%s.json" "$output_dir" "$title")
jq_filter='{title: $title, rules: (.profiles | map(select(.name == $profile))[0] | .complex_modifications.rules)}'
if "$no_jq"; then
    goku --dry-run-all
elif [ "$write_file" == false ]; then
    goku --dry-run-all | jq --arg profile "$profile" --arg title "$title" "$jq_filter"
else
    goku --dry-run-all | jq --arg profile "$profile" --arg title "$title" "$jq_filter" >| "$output_file"
fi