nconf-jsonenv

Configure nconf with JSON from environment variables.

By default it looks for environment variables with prefix JSONCONF_, parses them as JSON and merges them into the nconf config. Environment variables are processed alphabetically, so you can control their order using simple A-Z naming conventions JSONCONF_A, JSONCONF_B, etc.

By default all configs are merged into the top-level config, but this can be overridden by adding a second environment variable with the same name, and suffix _AT with the nconf path where the config should be added.

For example, suppose the following environment variables are defined.

export JSONCONF_A='{"port": 3000}'
export JSONCONF_B='{"hostname": "127.0.0.1", "password": "shhh"}'
export JSONCONF_B_AT='db:main'

They would produce the following nconf configuration.

{
	port: 3000,
	db: {
		main: {
			hostname: '127.0.0.1',
			password: 'shhh'
		}
	}
}

Installation

npm install --save nconf nconf-jsonenv

Usage

const nconf = require('nconf');
require('nconf-jsonenv');

nconf.use('jsonenv');

Options

• prefix - string prefix to match for environment variables, default "JSONCONF_"
• suffix - string to indicate merge path override, default "_AT"
• readOnly - boolean if values can be overridden, default false.

Example passing custom options:

nconf.use('jsonenv', {
	prefix: 'CUSTOM',
	suffix: 'X',
	readOnly: false
});