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config.js
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config.js
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// Copyright 2017, Google, Inc.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
'use strict';
// Hierarchical node.js configuration with command-line arguments, environment
// variables, and files.
const nconf = module.exports = require('nconf');
const path = require('path');
nconf
// 1. Command-line arguments
.argv()
// 2. Environment variables
.env([
'DATA_BACKEND',
'GCLOUD_PROJECT',
'INSTANCE_CONNECTION_NAME',
'MYSQL_USER',
'MYSQL_PASSWORD',
'NODE_ENV',
'PORT'
])
// 3. Config file
.file({ file: path.join(__dirname, 'config.json') })
// 4. Defaults
.defaults({
// dataBackend can be 'datastore' or 'cloudsql'. Be sure to
// configure the appropriate settings for each storage engine below.
// If you are unsure, use datastore as it requires no additional
// configuration.
DATA_BACKEND: 'cloudsql',
// This is the id of your project in the Google Cloud Developers Console.
GCLOUD_PROJECT: '',
MYSQL_USER: '',
MYSQL_PASSWORD: '',
PORT: 8080
});
// Check for required settings
checkConfig('GCLOUD_PROJECT');
if (nconf.get('DATA_BACKEND') === 'cloudsql') {
checkConfig('MYSQL_USER');
checkConfig('MYSQL_PASSWORD');
if (nconf.get('NODE_ENV') === 'production') {
checkConfig('INSTANCE_CONNECTION_NAME');
}
}
function checkConfig (setting) {
if (!nconf.get(setting)) {
throw new Error(`You must set ${setting} as an environment variable or in config.json!`);
}
}