gistfile1.builder

#!/usr/bin/env ruby
#
# This tag doesn't work: div.span-3col.column
#
full_line = STDIN.read
raw_tag = if full_line.strip.match(/\s/)
            full_line.strip.reverse.match(/^.*?\s/).to_s.reverse.strip
          else
            full_line.strip.reverse.match(/^.*?\s?$/).to_s.reverse.strip
          end

tag   = raw_tag.match(/^\w+?\b/)
tag_classes = raw_tag.scan(/\.(\w+?)\b/)
tag_ids = raw_tag.scan(/#(\w+?)\b/)

attr_id = tag_ids.empty? ? "" : " id=\"#{tag_ids.last}\""
attr_class = tag_classes.empty? ? "" : " class=\"#{tag_classes.join(' ')}\""

single_no_arg = /(br)/i
single        = /(img|meta|link|input|base|area|col|frame|param|hr)/i

out = case tag
  when single_no_arg then "<#{tag} />"
  when single then        "<#{tag}#{attr_id}#{attr_class}$1 />"
  when '' then            "<${1:#{ENV['TM_DEFAULT_TAG'] || 'p'}}>$2</${1/\\s.*//}>"
  else                    "<#{tag}#{attr_id}#{attr_class}>$1</#{tag}>"
end

if full_line.length != raw_tag.length
  print full_line[0..(full_line.length - raw_tag.length-1)] + out
else
  print out
end