##
# <doc topic="Example with spaces">
# Thats by the way doc example.
# It uses *markdown* as markup.
# </doc>
#
def scandoc file
  doc_start_rx = /(.+)(<doc( topic=\"(.+)\")?>)/
  doc_end_rx = /(.+)(<\/doc>)/

  File.open(file) do |file|
    file.each_line.inject({docs: [], current: nil, indent: nil}) do |docs, line|

      docs[:docs] << docs[:current] if line =~ doc_end_rx
      docs[:current] = nil if line =~ doc_end_rx

      docs[:current][:doc] << line.gsub(docs[:indent], "") unless docs[:current].nil?

      docs[:current] = {doc: [], topic: line[doc_start_rx, 4]} if line =~ doc_start_rx
      docs[:indent] = line[doc_start_rx, 1] if line =~ doc_start_rx

      docs
    end[:docs]
  end
end

##
# <doc>
# Just run
# </doc>
puts (scandoc __FILE__)