Rails 3 local configuration

boot.rb

# Load a config-local.yml configuration file, which has special
# configuration directives per environment.

require 'rails'

CONFIG_LOCAL = 'config-local.yml'
OPTIONS = {
  :listen_port         => 3000,

  # Default email addresses.
  :email => {
    # Default sender for outgoing emails.
    :default_sender   => '[email protected]',

    # Customer service email address (where people can send email)
    :customer_service => '[email protected]',

    # If non-nil, this email address overrides the user-supplied
    # address for registration emails. This is largely for
    # pre-deployment: It allows us to intercept any attempt to
    # register an account.
    :registration_intercept => nil

  },

  # SMTP server settings, etc.
  :smtp_settings => {
    :server               => 'smtp.example.com',
    :port                 => 587,
    :domain               => 'example.com',
    :auth_type            => :plain,
    :auth_user            => '[email protected]',
    :auth_password        => 'xxxxxxxx',
    :use_tls              => true
  },

  # Public, private keys for reCaptcha.
  :recaptcha => {
    :public_key  => "NotARealKey-kAWBdoYHBJfB1_sadf893jddk47v",
    :private_key => "NotARealKey-AACXOHDuMwq6QTY_L-9723lsuiTyT"
  }
}

# Recursively map a hash's keys to symbols. Used to map the parsed YAML
# into a symbol-keyed hash, like the above.
def fix_config_hash(h)
  h2 = {}
  h.each do |k, v|
    v = fix_config_hash(v) if v.class == Hash
    h2[k.to_sym] = v
  end
  h2
end

local_config_path = File.expand_path(CONFIG_LOCAL, File.dirname(__FILE__))
if File.exists? local_config_path
  require 'erb'

  # Open the file as an ERB template.
  template = ERB.new File.open(local_config_path).read

  # Load the template as a YAML document.
  cfg = YAML::load template.result(binding)

  _local_config = fix_config_hash(cfg[Rails.env] || {})
else
  _local_config = {}
end

# Save the configuration in a global, accessible from the application.
LocalConfig = OPTIONS.merge _local_config

# adjust port. See
# http://stackoverflow.com/questions/3842818#6539193

require 'rails/commands/server'

module Rails
  class Server
    alias :default_options_alias :default_options
    def default_options
      default_options_alias.merge!(:Port => LocalConfig[:listen_port])
    end
  end
end