Note: this is a fork of env-merger. The differnce is that this project gives priority to variables defined in the operating system - OS defined environment variables will NOT be overriden by variables defined in any files.

No-frills merging of environment-specific configuration files into process.env. Requires node 6+.

Usage:

Place your environment file(s) in a directory under your project called /config.

In /env/development.env:

# My environment values
foo=1
bar=2

In your node app (eg, index.js):

require('env-merger')();
process.env.foo; // 1
process.env.bar; // 2

The value of NODE_ENV determines which environment file to use. The following will use values in the file development.env ( If NODE_ENV is not set, assumes production environment and will attempt to load a file production.env)

NODE_ENV=development & node index.js

Files:

Values are loaded from environment files in the following order:

1. process.env
2. config/default.env
3. config/{NODE_ENV}.env
4. config/local.env

Files that don't exist are skipped. Each subsequent file will override values in the preceding file.

See the properties package for more info on file structure.

The local.env file is intended to contain overrides for local environments only -- this file is typically not committed to source control.

Options:

dir

default: 'env'

Specify directory to look in for environment files.

require('env-merger')({ dir: 'foobar' });

mergeProcess

default: true

• True: merges your environment values into process.env.

• False: will not merge process.env. Returns an object containing only values from your own environment files:

  const env = require('env-merger')({ mergeProcess: false });
  env.foo; // 1
  env.bar; // 2