Script that generates a database.yml file based on some input. Used for CI environments mainly.

database_yml.rb

require 'yaml'

class DatabaseYML
  attr_accessor :project_name, :config

  DEFAULT_OPTIONS = {
    "adapter" => "mysql2",
    "encoding" => "utf8",
    "reconnect" => false,
    "pool" => 5,
    "username" => "jenkins",
    "password" => ""
  }

  def initialize(project_name, env = "test")
    @env, @project_name = env.to_s, project_name.downcase.gsub(/\s/, "_")
    @options = DEFAULT_OPTIONS # TODO: Add customization for options
    @config = { @env => {} }
  end

  def to_s
    setup_config!
    @config.to_yaml
  end

  private

  def setup_config!
    @config[@env] = options_with_database!(@project_name)
  end

  def options_with_database!(project_name)
    @options["database"] = @project_name
    @config[@env] = @options
  end
end

if __FILE__ == $0
  # TODO: On next release please consider using OptionParser
  config = DatabaseYML.new(*ARGV)
  print config
end