confinit

Application configuration helpers for Node.Js

This module allow any Node.js application to read configuraiton from:

• environment variables (with a specifiec prefix)
• config json file
• command line (using --section_property=value syntax)

Usage (typescript)

Installation

npm install confinit

Import confinit

import * as confinit from "confinit";

Define a configuration class with one or more section:

export class Section1Config {
  url: string = "";
}

export class Configuration {
  readonly section1 = new Section1Config();

  constructor() {
    const env = process.env;
    // load config from configuration file
    if (env.config) {
      const configFile = path.resolve(process.cwd(), env.config);
      confinit.applyConfigFile(this, configFile);
    }
    // load config from environment variables
    confinit.applyEnvVariables(this, process.env, "cfg_");
    // load config from command line
    confinit.applyCommandArgs(this, process.argv);
  }
}

Then just use your configuraiton class:

const config = new Configuration();
console.log(config.section1);

Sample app

Read configuration from config file:

config=./sample/config1.json node ./sample/

or

node ./sample/ --config=./sample/config1.json

Read configuration from environment variables:

cfg_section1_url=http://test.com node ./sample/

Read configuration from command arguments:

node ./sample/ --section1_url=http://myotherurl.com

node ./sample/ --section1_url=http://myotherurl.com --webServer_port=8040