module Demeter

# File lib/demeter.rb, line 14
def self.env
  @environment ||= ENV['DEMETER_ENV'] || ENV['ENV'] || DEFAULT_ENV 
end

# File lib/demeter.rb, line 6
def self.root(root=nil)
  if root
    @root ||= root
  else
    @root ||= Pathname.new(Dir.pwd)
  end
end

# File lib/demeter.rb, line 43
def self.set_var(key, value)
  vars = self.vars
  vars[key] = value
  @vars = vars
end

# File lib/demeter.rb, line 18
def self.vars
  @vars ||= begin
    global_vars = {}
    env_vars = {}
    global_path = File.join(Demeter::root, "/variables/global.yml")
    environment_path = File.join(Demeter::root, "/variables/#{self.env}.yml")

    if File.exists?(global_path)
      global_vars = YAML::load_file(global_path)
      global_vars = Hash[global_vars.map{|k,v| ["global.#{k}",v]}]
    else
      fail "Global file /variables/global.yml not found! Add it before rerunning..."
    end

    if File.exists?(environment_path)
      env_vars = YAML::load_file(environment_path)
      env_vars = Hash[env_vars.map{|k,v| ["env.#{k}",v]}]
    else
      fail "Environment file /variables/#{Demeter::env}.yml not found! Add it before rerunning..."
    end

    global_vars.merge!(env_vars)
  end
end