UnlyEd/serverless-env-copy-plugin

const util = require('util');

function collectOfflineEnvVariables(serverless, cliOptions) {
  // Based on serverless offline (https://github.com/dherault/serverless-offline/blob/master/src/index.js)

  const defaultOptions = {
    host: 'localhost',
    port: 3000,
    httpsProtocol: '',
    prefix: '/',
  };

  const serverlessConfigOptions = (serverless.service.custom || {})['serverless-offline'];
  const options = { ...defaultOptions, ...serverlessConfigOptions, ...cliOptions };

  // Prefix must start and end with '/'
  if (!options.prefix.startsWith('/')) {
    options.prefix = `/${options.prefix}`;
  }
  if (!options.prefix.endsWith('/')) {
    options.prefix += '/';
  }

  const protocol = options.httpsProtocol.length > 0 ? 'https' : 'http';

  return {
    IS_OFFLINE: true,
    API_ENDPOINT: util.format('%s://%s:%s%s', protocol, options.host, options.port, options.prefix),
  };
}

module.exports = collectOfflineEnvVariables;