module Utils::Config

def self.install_config
  srcs = Dir[File.join(CONFIG_DIR, '*')]
  dst_prefix = ENV['HOME'] or fail 'environment variable $HOME is required'
  for src in srcs
    dst = File.join(dst_prefix, ".#{File.basename(src)}")
    if File.exist?(dst)
      rm_rf "#{dst}.bak"
      mv dst, "#{dst}.bak/", :force => true
    end
    cp_r src, dst
  end
  self
end