Preprocess Slim layout templates for Jekyll.

Rakefile

require 'rubygems'
require 'slim'

Slim::Engine.set_default_options :pretty => true

desc "Parse .slim layouts, ignoring any YAML front matter."
task :parse_slim do
  print "Parsing Slim layouts..."
  Find.find('_layouts/slim/') do |filename|
    if filename.match(/\.slim\Z/)
      slimfile = File.open(filename, "r")
      content = IO.read(filename)
      slimfile.close
      m = Regexp.new(/^(---.*?---\s*|\s*)(.*)/m).match(content)
      htmlname = filename.gsub("/slim","").gsub(".slim", ".html")
      htmlfile = File.new(htmlname, "w")
      htmlfile.write(m[1] + Tilt['slim'].new{m[2]}.render) 
      htmlfile.close
    end
  end
  puts "done!"
end

desc "Launch preview environment"
task :preview do
  Rake::Task["parse_slim"].invoke
  system "jekyll --auto --server"
end

desc "Build site"
task :build do |task, args|
  Rake::Task["parse_slim"].invoke
  system "jekyll"
end