@heisian/sequelize-cli/src/commands/database.js

The Sequelize CLI

import { _baseOptions } from '../core/yargs';
import { logMigrator } from '../core/migrator';

import helpers from '../helpers';
import { cloneDeep, defaults } from 'lodash';
import clc from 'cli-color';

const Sequelize = helpers.generic.getSequelize();

exports.builder = yargs => _baseOptions(yargs).help().argv;
exports.handler = async function (args) {
  const command = args._[0];

  // legacy, gulp used to do this
  await helpers.config.init();

  const sequelize = getDatabaseLessSequelize();
  const config = helpers.config.readConfig();

  switch (command) {
    case 'db:create':
      await sequelize.query(`CREATE DATABASE ${sequelize.getQueryInterface().quoteIdentifier(config.database)}`, {
        type: sequelize.QueryTypes.RAW
      }).catch(e => helpers.view.error(e));

      helpers.view.log(
        'Database',
        clc.blueBright(config.database),
        'created.'
      );

      break;
    case 'db:drop':
      await sequelize.query(`DROP DATABASE ${sequelize.getQueryInterface().quoteIdentifier(config.database)}`, {
        type: sequelize.QueryTypes.RAW
      }).catch(e => helpers.view.error(e));

      helpers.view.log(
        'Database',
        clc.blueBright(config.database),
        'dropped.'
      );

      break;
  }

  process.exit(0);
};

function getDatabaseLessSequelize () {
  let config = null;

  try {
    config = helpers.config.readConfig();
  } catch (e) {
    helpers.view.error(e);
  }

  config = cloneDeep(config);
  config = defaults(config, { logging: logMigrator });

  switch (config.dialect) {
    case 'postgres':
    case 'postgres-native':
      config.database = 'postgres';
      break;

    case 'mysql':
      delete config.database;
      break;

    case 'mssql':
      config.database = 'master';
      break;

    default:
      helpers.view.error(`Dialect ${config.dialect} does not support db:create / db:drop commands`);
  }

  try {
    return new Sequelize(config);
  } catch (e) {
    helpers.view.error(e);
  }
}