def install_stylesheet(from, to, options)
from = templatize(from)
to = targetize(install_location_for_stylesheet(to, options))
contents = File.new(from).read
if options.delete(:erb)
ctx = TemplateContext.ctx(:to => to, :options => options)
contents = process_erb(contents, ctx)
end
if preferred_syntax.to_s != from[-4..-1]
tree = Sass::Engine.new(contents, Compass.sass_engine_options.merge(:syntax => from[-4..-1].intern)).to_tree
contents = tree.send("to_#{preferred_syntax}")
to[-4..-1] = preferred_syntax.to_s
end
write_file to, contents
end