use DefinePlugin to include environment variables

[erikhuisman]

I did something like this to load some environment variables. Might come in handy to people building for test, staging, production.

  if (options.env) {
    var envfile = path.join(process.cwd(), path.dirname(entry), '.env.js')

    try {
      var environments = require(envfile);
      config.plugins.push(new webpack.DefinePlugin(environments))

      config._msgs.push(util.format(
        'Using custom environments (%s).',
        path.relative(process.cwd(), JSON.stringify(environments))
      ))
      config._msgs.push(util.format(
        'Using custom environments found in root of entrypoint (%s).',
        path.relative(process.cwd(), envfile)
      ))
    } catch (e) {
      config._msgs.push(util.format(
        'No custom environments found in root of entrypoint (%s).',
        path.relative(process.cwd(), envfile)
      ))
    }
  }

/ /.env.js
module.exports = {
    DEBUG: JSON.stringify(true),
    API: JSON.stringify('https://test.api.com')
};

console.log(DEBUG, API) // true, 'https://test.api.com'

[olahol]

Thank you @erikhuisman, that's a really nice addition, I've added this in version 0.5.0.