get_vars_from_files.sh

#!/bin/bash

function get_config() {

  conf_name="${1}"
  conf_file="${CONFIG_DIR}/${conf_name}"
  if [ -f ${conf_file} ]; then
    echo "Using config from ${conf_file}"
    value="$(cat ${conf_file})"
  else
    value="${!conf_name}"
  fi
  if [ ! -z ${value} ]; then
    eval "export ${conf_name}=${value}"
  fi
}

for file in ${CONFIG_DIR}/* ; do
  get_config $(basename ${file})
done