1_setup_main.rb

def setup(options)
  if !verify_no_credentials_in_checked_in_files!
    exit 1
  end
  log "💎 Installing gems"
  # Only do bundle install if the much-faster
  # bundle check indicates we need to
  bundle_install = "bundle install --jobs=4 --retry=3"
  system! "bundle check || #{bundle_install}"

  log "☕️ Installing Node modules"
  system! "bin/yarn install"

  log "🪑 Checking your .local configurations"
  check_for_local_configuration!

  system! "bin/db-reset"

  log "💰 Flushing all Redis databases"
  system!("bin/rails dev:redis_reset")

  log "🎉 All set up! 🎉"
  log ""
  log "To see commonly-needed commands, run:"
  log ""
  log "    bin/setup help"
  log ""
end

2_log_and_system.rb

def system!(*args, ignore_failure: false)
  log "🐈 Executing #{args}"
  if system(*args)
    log "😸 #{args} succeeded"
  else
    log "😿 #{args} failed"
    yield if block_given?
    if ignore_failure
      log "😿 Ignoring the failure"
    else
      abort
    end
  end
end

def log(message)
  puts "[ bin/setup ] #{message}"
end

3_verify_no_creds.rb

def verify_no_credentials_in_checked_in_files!
  rails_root = Pathname(__FILE__).dirname / ".."

  found_at_least_one_problem = false

  [
    ".env.development",
    ".env.development.local",
    ".env.test",
    ".env.test.local",
  ].each do |dotenv_file|
    path_to_dotenv_file = rails_root / dotenv_file
    if File.exists?(path_to_dotenv_file)
      contents = File.read(path_to_dotenv_file).split(/\n/).reject{ |line|
        line =~ /^#/
      }
      database_urls = contents.select { |line|
        line =~ /^[^=]*DATABASE_URL=/
      }
      database_urls.each do |database_url|
        var_name, connection_string = database_url.split("=",2)
        if connection_string =~ /amazonaws.com/
          found_at_least_one_problem = true
          log "❗️ #{var_name} in #{dotenv_file} seems to point to a non-local database"
        end
      end
    end
  end
  if found_at_least_one_problem
    log "‼️  There was at least one problem with your existing .env files"
  end
  !found_at_least_one_problem
end

4_setupdotenv.rb

def check_for_local_configuration!
  rails_root = Pathname(__FILE__).dirname / ".."
  path_to_dot_env_development_local = rails_root / ".env.development.local"

  if !File.exists?(path_to_dot_env_development_local)
    system! "touch .env.development.local"
  end

  contents = File.read(path_to_dot_env_development_local).split(/\n/).reject { |line|
    line =~ /^#/
  }

  need_google_keys = false
  if contents.detect { |line| line =~ /^GOOGLE_CLIENT_ID=\S+$/ }.nil?
    log "❗️ .env.development.local Missing GOOGLE_CLIENT_ID"
    need_google_keys = true
  end
  if contents.detect { |line| line =~ /^GOOGLE_CLIENT_SECRET=\S+$/ }.nil?
    log "❗️ .env.development.local Missing GOOGLE_CLIENT_SECRET"
    need_google_keys = true
  end

  if need_google_keys
    log "🔑 You need the Google OAuth keys to run the app locally"
    log "🔑 Here is how to get them:"
    log ""
    log "1️⃣  Open up 1Password and locate the Secure Note titled"
    log "    \"Google OAuth Credentials for Hermes Local Development \""
    log "2️⃣  Copy and paste them into your .env.development.local"
    log "    The names are in the note, but they should be GOOGLE_CLIENT_ID an GOOGLE_CLIENT_SECRET"
    log "3️⃣  Re-run this script"
    log ""
    exit 1
  end

  path_to_dot_env_test_local = rails_root / ".env.test.local"

  if !File.exists?(path_to_dot_env_test_local)
    system! "touch .env.test.local"
  end

  contents = File.read(path_to_dot_env_test_local).split(/\n/).reject { |line|
    line =~ /^#/
  }
end

5_app_config.rb

# config/initializers/00_appconfig.rb
class AppConfig
  def self.methods_to_check
    @methods_to_check ||= []
  end

  def self.check(method_name)
    methods_to_check << method_name
  end

  def initialize
    self.class.methods_to_check.each do |method_name|
      self.send(method_name)
    end
  end

  check def google_client_id
    ENV.fetch("GOOGLE_CLIENT_ID")
  end

  check def google_client_secret
    ENV.fetch("GOOGLE_CLIENT_SECRET")
  end
end