#!/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.

compile '*' do
  if item.identifier == '/toc/'
    filter :kramdown
    layout 'blank'
  elsif item[:extension] == 'md'
    filter :kramdown, {:input => 'GFM'}
    filter :colorize_syntax, :default_colorizer => :pygmentize
    filter :relativize_paths, :type => :html
    layout 'default'
  elsif item[:extension] == 'css'
    # don’t filter stylesheets
  elsif item.binary?
    # don’t filter binary items
  else
    filter :erb
    layout 'default'
  end
end

route '*' do
  if item[:extension] == 'css'
    # Write item with identifier /foo/ to /foo.css
    item.identifier.chop + '.css'
  elsif 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