bash_helpers.sh

# Dependencies =================================================================

err_unless_executable () {
  if ! [ -x "$(command -v $1)" ]; then
    echo "Program '$1' is required. Please install it and make it available in your \$PATH. Aborting." >&2
    exit 1
  fi
}

# TODO: can we expect curl these deps to be installed in all target machines?
err_unless_executable curl
err_unless_executable python

# JSON =========================================================================

json_read () {
  local path=$1
  local json_str=$2

  echo "$json_str" | python -c "import sys, json; print(json.load(sys.stdin)${path})"
}

# Test if available python version is compatible with this implementation of json_read()
if [ "123" != "$(json_read '["asd"][3]["zxc"]' '{"asd": ["q", "w", "e", {"zxc": 123}]}')" ]
then
  echo "Available Python version is not compatible. Aborting." >&2
  exit 1
fi

# HTTP =========================================================================

safe_curl () {
  local request_method=$1
  local url=$2
  shift 2  # So now "$@" is all the remaining args

  local body_and_status
  local exit_code
  # NOTE: --disable (local config) has to be the 1st param to curl (see man)
  body_and_status="$(curl --disable --location --silent --write-out "\nHTTP_CODE:%{http_code}" -X "$request_method" "$url" "$@")"
  exit_code=$?

  # Output vars
  # See https://superuser.com/questions/501690/curl-http-code-of-000
  last_http_status="$(echo "$body_and_status" | tail -n1 | cut -d":" -f2)"
  last_response_body="$(echo "$body_and_status" | sed '$d')"
  last_curl_exit_code=$exit_code
}