Rules

#!/usr/bin/env ruby

# A few helpful tips about the Rules file:
#
# * The string given to #compile and #route are matching patterns for
#   identifiers--not for paths. Therefore, you can’t match on extension.
#
# * The order of rules is important: for each item, only the first matching
#   rule is applied.
#
# * Item identifiers start and end with a slash (e.g. “/about/” for the file
#   “content/about.html”). To select all children, grandchildren, … of an
#   item, use the pattern “/about/*/”; “/about/*” will also select the parent,
#   because “*” matches zero or more characters.

# ----------------------------------------------------------------------
# compass setup
# requires the compass gem and makes sure it uses the correct config file
# ----------------------------------------------------------------------
require 'compass'
Compass.add_project_configuration('compass.rb')      # for Compass 0.10
#Compass.configuration.parse 'compass.rb'            # for Compass < 0.10

# ----------------------------------------------------------------------
# preprocess
# handy rule to pre process items from the site before the compile/route
# pieces run.
# ----------------------------------------------------------------------
preprocess do
  # unpublish items by setting meta attribute publish: false
  items.delete_if { |item| item[:publish] == false }

  copy_assets
end


# ----------------------------------------------------------------------
# stylesheets
# compiles the sass or scss files using the sass engine then takes the 
# sass or scss, rips off the extention and changes it to .css
# ----------------------------------------------------------------------
compile '/assets/stylesheets/_*/' do
    # don’t compile partials
end

route '/assets/stylesheets/_*/' do
    # don't output partials
    nil
end

compile '/assets/stylesheets/*/' do
    filter :sass, Compass.sass_engine_options
end

route '/assets/stylesheets/*/' do
    # prevents nanoc from generating a directory for each css file
    item.identifier.chop + '.css'
end


# ----------------------------------------------------------------------
# content
# filters and compiles the haml content then takes the content
# files and changes the extention to .html
# ----------------------------------------------------------------------
compile '*' do
    #filter :haml
    #layout 'default'
    # gets the extension of each item so we can run some basic logic
    # and apply the correct filter
    ext = item[:extension].nil? ? nil : item[:extension].split('.').last
    
    if ext == 'erb'
        filter :erb
    elsif ext == 'haml' || ext.nil?
        filter :haml
    elsif ext == 'md' || ext == 'markdown'
        filter :erb
        filter :rdiscount
    elsif ext == 'html'

    elsif ext == 'txt'
        item.identifier
    else
        raise "Filter is not configured for #{item.identifier} in Rules file."
    end
    
    layout 'default' unless item[:layout] == "none"
end

route '*' do
  item.identifier + 'index.html'
end

# ----------------------------------------------------------------------
# layout
# universal rule to format haml content as HTML5 and set some formatting
# options to Haml outputs pretty html. For production you can set
# ':ugly' to 'true'.
# ----------------------------------------------------------------------
layout '*', :haml, :format => :html5, :ugly => false, :escape_html => false

# ----------------------------------------------------------------------
# originals
compile '/stylesheet/' do
  # don’t filter or layout
end

compile '*' do
  if item.binary?
    # don’t filter binary items
  else
    filter :erb
    layout 'default'
  end
end

route '/stylesheet/' do
  '/style.css'
end

route '*' do
  if item.binary?
    # Write item with identifier /foo/ to /foo.ext
    item.identifier.chop + '.' + item[:extension]
  else
    # Write item with identifier /foo/ to /foo/index.html
    item.identifier + 'index.html'
  end
end

layout '*', :erb