amoeba/lib/config.js

Common library for tidepool.org

// == BSD2 LICENSE ==
// Copyright (c) 2014, Tidepool Project
// 
// This program is free software; you can redistribute it and/or modify it under
// the terms of the associated License, which is identical to the BSD 2-Clause
// License as published by the Open Source Initiative at opensource.org.
// 
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the License for more details.
// 
// You should have received a copy of the License along with this program; if
// not, you can obtain one from Tidepool Project at tidepool.org.
// == BSD2 LICENSE ==

'use strict';

var except = require('./except.js');

exports.fromEnvironment = function(name, defaultVal) {
  var retVal = process.env[name];
  if (retVal == null) {
    if (defaultVal === undefined) {
      throw except.ISE('Must specify environment variable[%s]', name);
    }
    return defaultVal;
  }
  return retVal;
};