module Choices

# File lib/choices.rb, line 8
def load_settings(filename, env)
  mash = Hashie::Mash.new(load_settings_hash(filename))
  
  with_local_settings(filename, '.local') do |local|
    mash.update local
  end

  mash.fetch(env) do
    raise IndexError, %{Missing key for "#{env}" in `#{filename}'}
  end
end

# File lib/choices.rb, line 20
def load_settings_hash(filename)
  yaml_content = ERB.new(IO.read(filename)).result
  yaml_load(yaml_content)
end

# File lib/choices.rb, line 25
def with_local_settings(filename, suffix)
  local_filename = filename.sub(/(\.\w+)?$/, "#{suffix}\\1")
  if File.exists? local_filename
    hash = load_settings_hash(local_filename)
    yield hash if hash
  end
end

# File lib/choices.rb, line 33
def yaml_load(content)
  if defined?(YAML::ENGINE) && defined?(Syck)
    # avoid using broken Psych in 1.9.2
    old_yamler = YAML::ENGINE.yamler
    YAML::ENGINE.yamler = 'syck'
  end
  begin
    YAML::load(content)
  ensure
    YAML::ENGINE.yamler = old_yamler if defined?(YAML::ENGINE) && defined?(Syck)
  end
end