Loading environment properties from a property file

Install properties reader:

npm install properties-reader –save

Create a directory env to store your properties files:

mkdir env

Create environments.js:

process.argv.forEach(function (val, index, array) {
    var arg = val.split("=");
    if (arg.length > 0) {
        if (arg[0] === 'env') {
            var env = require('./env/' + arg[1] + '.properties');
            module.exports = env;
        }
    }
});

Sample development.properties properties file:

# Dev properties
[main]
# Application port to run the node server
app.port=8080

[database]
# Database connection to mysql
mysql.host=localhost
mysql.port=2500
...

Sample usage of the loaded properties:

var enviorment = require('./environments');
var PropertiesReader = require('properties-reader');
var properties = new PropertiesReader(enviorment);
   
var someVal = properties.get('main.app.port');

Starting the express server

npm start env=development

npm start env=production

Found a mistake? Have a question or improvement idea? Let me know.

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