preset-process-env

Preset node process.env before run scripts

Install

npm i preset-process-env

Usage

Basic

Assume there are 2 environments, prod and test. Build your source code by npm run build command.

"scripts": {
    "build": "your command",
    "build:prod": "preset-process-env build prod",
    "build:test": "preset-process-env build test"
}

preset-process-env should

1. Find the corresponding environment config file under /envs directory. File name is .env.xxx.js, xxx is from command line,

   eg. preset-process-env build prod -> /envs/.env.prod.js
   eg. preset-process-env build test -> /envs/.env.test.js

2. Read the export JSON object from environment js file, copy properties to process.env,
3. Run command by given command line,

   eg. preset-process-env build prod -> npm run build
   eg. preset-process-env test prod -> npm run test

Additional

Variables also can be passed by command line,

eg. preset-process-env build prod VAR-A=abc -> process.env['VAR-A'] // output: "abc"
eg. preset-process-env build prod VAR-B=false -> process.env['VAR-B'] // output: false
eg. preset-process-env build prod VAR-C -> process.env['VAR-C'] // output: true

• true/false should be converted to boolean value,
• true is optional.

Sample

• /envs/.envs.test.js

  module.exports = {
      // environment name
      ENV_NAME: 'TEST',
  };

• Command line,

  preset-process-env build test
  

• In your source code,

  console.log(process.env.ENV_NAME);	// output: TEST