module Deas

# File lib/deas/template_source.rb, line 79
def get_ext_list(path)
  # get the base name of the path (file name plus extensions).  Split on the
  # periods and drop the first value (the file name).  reverse the list b/c
  # we process exts right-to-left.  reject any unnecessary exts.
  File.basename(path).split('.').drop(1).reverse.reject.each_with_index do |e, i|
    # keep the first ext (for initial render from source) and any registered
    # exts.  remove any non-first non-registered exts so you don't have the
    # overhead of running through the null engine for each.
    i != 0 && !self.engine_for?(e)
  end
end

# File lib/deas/template_source.rb, line 70
def parse_ext_list(template_name)
  paths = Dir.glob(File.join(@path, "#{template_name}*"))
  if paths.size > 1
    raise ArgumentError, "#{template_name.inspect} matches more than one " \
                         "file, consider using a more specific template name"
  end
  get_ext_list(paths.first.to_s)
end