/dotenv-multi

Load multiple environment variables using dotenv

Primary LanguageJavaScript

Welcome to dotenv-multi 👋

Version License: MIT

English | 中文文档

dotenv-multi Use dotenv to parse and load variables from multiple env files to process.env, and distinguish between different modes.

Install

// with npm
npm install dotenv-multi

// with yarn
yarn add dotenv-multi

Usage

const dotenvMulti = require('dotenv-multi');
dotenvMulti.loadEnv({ dir: 'path/to/envFileDir', mode: 'myMode' });

API

loadEnv(options: LoadOptions): Result

loadEnv will parse and merge the following files into process.env in the dir folder.

  • .env
  • .env.local
  • .env.[mode]
  • .env.[mode].local

Note：

  1. Priority of the above files from low to high
  2. The file will be skipped if the file does not exist
  3. Will not overwrite the original value in process.env
  4. The method used to merge the variables in the file is "Object.assign".

Example

Assume that there are some env files in the env/ folder

// .env
foo=foooooo
URL=api.default.com
endpoint=path/to/endpoint

// .env.dev
URL=api.dev.com

// .env.local
URL=api.dev-local.com
e1=some-local-var

//.env.stg
URL=api.stg.com

//.env.prd
bar=barrrrr
URL=api.prd.com

//.env.prd.local
URL=api.prd.com
enpoint=/another/path/to/endpoint
proxy=/another

Suppose we distinguish the modes through process.env.API

const dotenvMulti = require('dotenv-multi');
dotenvMulti.loadEnv({ dir: './env', mode: process.env.API });

Start the script in different ways as follows

# load .env、.env.local、.env.dev、.env.dev.local
$ cross-env API=dev npm run some-script

# load .env、.env.local、.env.stg、.env.stg.local
$ cross-env API=stg npm run some-script

# load .env、.env.local、.env.prd、.env.prd.local
$ cross-env API=prd npm run some-script

Then we can get the corresponding environment variables in the project

Interface

LoadOptions

Key Type Default Required Description
dir string process.cwd() N Directory path where env files are stored
mode string process.env.NODE_ENV N current mode

Result: ParseSuccess | ParseError

interface ParseSuccess {
  parsed: { [props: string]: string };
  error: null;
}

interface ParseError {
  error: Error;
  parsed: null;
}

Author

👤 render

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