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Comatose CMS XML Text Filter

bryan / 14.Jan.2008

I recently contributed a new Text Filter to the Comatose "micro-CMS" project. The filter uses XML and XSLT to produce XHTML ready for Liquid or Erb rendering. It's stupidly simple.
  1. Install libxml

    2. Choose your version from libxml's download page. Install in the usual way, probably adding something like --prefix=/usr/local/ to ./configure

  2. Install libxslt

    3. Choose your version from libxslt's download page. Same install as libxml.

  3. install the ruby gem

    4. something like ruby gem install ruby-xslt

  4. add the filter to your project

    5. Add the following to environment.rb: 

    require 'xml/xslt'

TextFilters.define :xml, "XML" do
  require 'xml/xslt'
  
  def render_text(text)
     xslt = XML::XSLT.new()
     xslt.xml = text
     xslt.xsl = "/path/to/the/xslt/file.xslt"
     out = xslt.serve()
     return out
  end

Then in your Comatose pages, you should have the XML filter listed. Your XML should look something like this: 

<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet href='foo.xslt' type='text/xsl'?>
<foo>
  <bar>
    <baz>{{ 'this is foo' }}</baz>
  </bar>
</foo>

For embedding weird stuff, just use CDATA, like: 

<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet href='foo.xslt' type='text/xsl'?>
<foo>
  <bar>
    <baz>
      <![CDATA[ 
        <a href="{{ 'foo' | link }}">foo</a>
      ]]>
    </baz>
  </bar>
</foo>

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