haml2erb

erbengine.rb

class ErbEngine < Haml::Engine
  def push_script(text, preserve_script, in_tag = false, preserve_tag = false,
                  escape_html = false, nuke_inner_whitespace = false)
    push_text "<%= #{text.strip} %>"
  end
  
  def push_silent(text, can_suppress = false)
    push_text "<% #{text.strip} %>"
  end

  def parse_tag(line)
    out = super
    out[2][:old].gsub!(/\#\{(.*?)\}/) { |match| "<%= #{$1} %>" } if out[2][:old]
    out
  end
end

s='.overlay.centercenter
  .lolflexbox
    %h3=t("forum.topic.deleted_notice")
    %ul.util
      %li
        %a.button{:href=>"#",:onclick=>"$(\"#post#{message.id} .overlay\").fadeOut();return false;"}=t("forum.topic.show_deleted_post")'

ErbEngine.new(s,:escape_attrs=>false).to_html

output.txt

<div class='overlay centercenter'>
  <div class='lolflexbox'>
    <h3>    <%= t("forum.topic.deleted_notice") %>
</h3>
    <ul class='util'>
      <li>
        <a class='button' href='#' onclick='$("#post<%= message.id %> .overlay").fadeOut();return false;'>        <%= t("forum.topic.show_deleted_post") %>
</a>
      </li>
    </ul>
  </div>
</div>