Script to update dependencies and reset the db.

respawn

#!/usr/bin/env ruby
require "fileutils"

# path to your application root.
APP_ROOT = File.expand_path("..", __dir__)

def system!(*args)
  system(*args) || abort("\n== Command #{args} failed ==")
end

def continue
  puts "Press Enter to continue\r"
  gets
end

FileUtils.chdir APP_ROOT do
  # This script is a way to update your development environment automatically.
  # This script is idempotent, so that you can run it at any time and get an expectable outcome.
  # Add necessary setup steps to this file.
  puts "== Starting Respawn =="
  puts "Warning! Be sure to stop all Procfile managed processes"
  continue

  puts "== Installing dependencies =="
  system! "gem install bundler -v \"$(grep -A 1 \"BUNDLED WITH\" Gemfile.lock | tail -n 1)\""
  system! "gem install bundler --conservative"
  system("bundle check") || system!("bundle install")

  # Install JavaScript dependencies
  system! "bin/yarn --check"

  puts "\n== Clear Redis queues =="
  system! "redis-cli flushall"

  puts "\n== Preparing & seeding database =="
  # db:setup rebuilds the database structure for both test and development
  # and then runs db:seed
  # db:reset command will drop the database and set it up again.
  # This is functionally equivalent to db:drop db:setup.
  system! "bin/rails db:reset"

  puts "\n== Completed! =="
  puts "You may start your Procfile managed processes now."
end

Thanks @davidteren, very helpful!