module Jekyll

def self.configuration(override)

Returns the final configuration Hash.

list of option names and their defaults.
the defaults and the config file. See Jekyll::Configuration::DEFAULTS for a
override - A Hash of config directives that override any options in both

options with anything in _config.yml, and adding the given options on top.
Public: Generate a Jekyll configuration Hash by merging the default 
def self.configuration(override)
  config = Configuration[Configuration::DEFAULTS]
  override = Configuration[override].stringify_keys
  config = config.read_config_files(config.config_files(override))
  # Merge DEFAULTS < _config.yml < override
  config = Utils.deep_merge_hashes(config, override).stringify_keys
  set_timezone(config['timezone']) if config['timezone']
  config
end

def self.env 

def self.env
  ENV["JEKYLL_ENV"] || "development"
end

def self.fs_root

Returns the root of the filesystem as a Pathname

Public: File system root 
def self.fs_root
  @fs_root ||= "/"
end

def self.logger 

def self.logger
  @logger ||= LogAdapter.new(Stevenson.new)
end

def self.logger=(writer) 

def self.logger=(writer)
  @logger = LogAdapter.new(writer)
end

def self.sanitized_path(base_directory, questionable_path) 

def self.sanitized_path(base_directory, questionable_path)
  clean_path = File.expand_path(questionable_path, fs_root)
  clean_path.gsub!(/\A\w\:\//, '/')
  unless clean_path.start_with?(base_directory)
    File.join(base_directory, clean_path)
  else
    clean_path
  end
end

def self.set_timezone(timezone)

Returns nothing

timezone - the IANA Time Zone

Static: Set the TZ environment variable to use the timezone specified 
def self.set_timezone(timezone)
  ENV['TZ'] = timezone
end