Respondent

A package which allows for modular configuration loading from a specified directory

---

Introduction

The package exports a class that can be instantiated to read configuration files from any specified directory.

Basic usage

Respondent requires 2 parameters. The first being the path to directory of your configuration files. The second being any environment variables you want to pass through to be loaded into your configuration files, the value is appended to the process.env global. That means whatever environment variables you pass through can be accessed via process.env

const Path = require('path');
const Respondent = require('respondent');
 
let config = new Respondent({
  rootDir: Path.join(__dirname, 'config'),
  env: {
    someEnvValue: 'hello world' // In your configuration files, you can use `process.env.someEnvValue` to access this environment variable
  }
});

The get method in Respondent is used to retrieve specific values. The has method is used to determine if the value exists. Respondent uses dot notation in order to specify a path to a specific value. The syntax is as follows:

[fileName].[path]

Example:

app.name

app.database.host

It should be noted that if a file/value does not exist, no error will be thrown. Instead the return value is undefined and a debug message is outputted to the console.

Example usage

Assume the following directory structure

├── main.js
└── config
    └── app.js

app.js

module.exports = {
  name: 'Respondent',
  database: {
    host: '127.0.0.1',
    username: 'root'
  },
  options: {
    currency: 'GBP'
  }
};

main.js

'use strict';
 
const Path = require('path');
const Respondent = require('respondent');
 
let config = new Respondent({
  rootDir: Path.join(__dirname, 'config')
});
 
let name = config.get('app.name'); // 'Respondent'
let databaseHost = config.get('app.database.host'); // '127.0.0.1'
let databaseUsername = config.get('app.database.username'); // 'root'
let databasePassword = config.get('app.database.password'); // undefined
 
let currency = config.get('app.options.currency'); // 'GBP'
let country = config.get('app.options.country', 'United Kingdom'); // 'United Kingdom'
 
let hasCountry = config.has('app.options.country'); // false

API

/**
 * Retrieve the root path of the config directory.
 *
 * @returns {string}
 */
 Respondent#getRootDirectory();
 
/**
 * Retrieve a value from the specified path.
 *
 * @param {string} valuePath
 * @param {string} defaultValue
 * @returns value
 */
Respondent#get(valuePath, defaultValue);
 
/**
 * Check if the specified path & value exists.
 *
 * @param {string} valuePath
 * @returns {boolean}
 */
Respondent#has(valuePath);

Contributing

Respondent makes use of mocha in order to conduct it's unit tests, thus contributions should be submitted with unit tests relevant to your work.

License

Copyright (c) 2019 Kieron Wiltshire

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.