counting_javascript.rb

require 'haml'

def line_counter(node)
  decendants = node.children.map{|n| line_counter(n)}
  if node.type == :filter && %w{ javascript erb plain }.include?(node.value[:name])
    me = node.value[:text].split("\n").length
  else
    me = 0
  end
  sum(decendants) + me
end

def sum(values)
  values.reduce(0) { |total, value| total += value }
end

haml_files = File.join("../gradesfirst/app/views", "**", "*.haml")
puts Dir.glob(haml_files).inject(0){ |line_count, file_name|
  begin
    text = File.read(file_name)
    parser = Haml::Parser.new(text, Haml::Options.new)
    tree = parser.parse
    file_line_count = line_counter(tree)
    line_count += file_line_count
    puts " #{file_line_count} #{file_name}"
  rescue
    puts ' ERROR: ' + file_name
  end
  line_count
}