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.

require 'compass'
Compass.add_project_configuration 'compass/config.rb'

compile '/stylesheets/*/' do
  filter :sass, Compass.sass_engine_options
  filter :relativize_paths, :type => :css
end

compile '/' do
  filter :erb
  layout 'default'
end

compile '/archive/*' do
  filter :erb
  layout 'default'
end

compile '*' do
  # item[:extension] returns 'html.erb' for multi-dotted filename
  ext = item[:extension].nil? ? nil : item[:extension].split('.').last
  
  if ['erb', 'md', 'markdown', 'xml', 'html'].include?(ext) || ext.nil?
    filter :erb
    filter :redcarpet2 if ['md', 'markdown'].include?(ext)
    filter :rubypants
  elsif ['ico'].include?(ext)
  else
    raise "Filter is not configured for #{item.identifier} in Rules file."
  end
  
  unless ['xml', 'ico'].include?(ext)
    item[:kind] ||= 'post'
    layout "_#{item[:kind]}"
    snapshot :guts
    layout 'default'
  end

end

route '/favicon/' do
  '/favicon.ico'
end

route '/atom/' do
  '/atom.xml'
end

route '/stylesheets/*/' do
  item.identifier.chop + '.css'
end

route '*' do
  route_path(item)
end

layout '*', :erb

preprocess do

  def paginate_posts
    
    posts_to_paginate = sorted_posts
    
    # Slice off the first :page_size posts since we include these in the index.
    posts_to_paginate.slice!(-(@config[:page_size])..-1)
    
    grouped_posts = []
    until posts_to_paginate.empty?
      grouped_posts << posts_to_paginate.slice!(0..(@config[:page_size] - 1))
    end
    
    # first = 1
    # last = [grouped_posts.first.length, @config[:page_size]].min + 1
    grouped_posts.each_with_index do |subposts, i|
      @items << Nanoc3::Item.new(
        "<%= render 'archive_page', :identifiers => #{subposts.map(&:identifier)}, :last_page => #{i + 1 == grouped_posts.length}, :i => #{i} %>",
        { :title => "Archive (Posts #{subposts.first[:created_at]} to #{subposts.last[:created_at]})" },
        "/archive/#{i + 1}/"
      )
      # first += subposts.length + 1
      # last += subposts.length + 1
    end
    
  end
  
  def normalize_dates
    require 'chronic'
    sorted_posts.each do |i|
      i[:created_at] = Chronic.parse(i[:created_at].to_s)
    end
  end
    
  def collate_links_on_homepage
    return unless latest_links.length > 0
    ll = latest_links
    k = @items.index{ |i| i.identifier == ll.first.identifier }
    created_at = @items[k][:created_at] || Time.now
    @items << Nanoc3::Item.new(
      "<%= render '_latest_links' %>",
      {
        :title => 'Latest Links',
        :created_at => created_at,
        :kind => 'latest_links'
      },
      "/posts/latest_links/"
    )
    ll.collect{ |l| item_by_identifier(l.identifier)[:in_latest_links] = true }
    # @items.delete_if{ |item| ll.map(&:identifier).include?(item.identifier) }
  end
  
  copy_assets
  @items.delete_if { |item| [false, 'false'].include?(item[:published]) }
  normalize_dates
  collate_links_on_homepage
  paginate_posts
end

Traceback

Captain! We’ve been hit!

=== MESSAGE:

Nanoc::Errors::NoSuchSnapshot: The “<Nanoc::ItemRep name=default binary=false raw_path=output/posts/2012-03-08-advice-blah-blah/index.html item.identifier=/posts/2012-03-08-advice_blah_blah/>” item rep does not have a snapshot “:guts”

=== COMPILATION STACK:

  (empty)

=== BACKTRACE:

  0. /Users/Crash/nanoc/lib/nanoc/base/result_data/item_rep.rb:254:in `compiled_content'
  1. /Users/Crash/nanoc/lib/nanoc/base/source_data/item.rb:135:in `compiled_content'
  2. item / (rep default):2:in `block in get_binding'
  3. item / (rep default):1:in `each'
  4. item / (rep default):1:in `get_binding'
  5. /Users/Crash/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/erb.rb:838:in `eval'
  6. /Users/Crash/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/erb.rb:838:in `result'
  7. /Users/Crash/nanoc/lib/nanoc/filters/erb.rb:31:in `run'
  8. /Users/Crash/nanoc/lib/nanoc/base/result_data/item_rep.rb:344:in `filter'
  9. /Users/Crash/nanoc/lib/nanoc/base/compilation/item_rep_proxy.rb:47:in `filter'
  10. /Users/Crash/nanoc/lib/nanoc/base/compilation/rule_context.rb:54:in `filter'
  11. ./Rules:25:in `block in load'
  12. /Users/Crash/nanoc/lib/nanoc/base/compilation/rule.rb:68:in `instance_eval'
  13. /Users/Crash/nanoc/lib/nanoc/base/compilation/rule.rb:68:in `apply_to'
  14. /Users/Crash/nanoc/lib/nanoc/base/compilation/compiler.rb:379:in `compile_rep'
  15. /Users/Crash/nanoc/lib/nanoc/base/compilation/compiler.rb:332:in `block in compile_reps'
  16. /Users/Crash/nanoc/lib/nanoc/base/compilation/compiler.rb:325:in `loop'
  17. /Users/Crash/nanoc/lib/nanoc/base/compilation/compiler.rb:325:in `compile_reps'
  18. /Users/Crash/nanoc/lib/nanoc/base/compilation/compiler.rb:85:in `run'
  19. /Users/Crash/nanoc/lib/nanoc/base/source_data/site.rb:57:in `compile'
  20. /Users/Crash/nanoc/lib/nanoc/cli/commands/compile.rb:57:in `run'
  21. /Users/Crash/nanoc/lib/nanoc/cli/command_runner.rb:14:in `block in call'
  22. /Users/Crash/nanoc/lib/nanoc/cli/error_handler.rb:42:in `handle_while'
  23. /Users/Crash/nanoc/lib/nanoc/cli/error_handler.rb:23:in `handle_while'
  24. /Users/Crash/nanoc/lib/nanoc/cli/command_runner.rb:13:in `call'
  25. /Users/Crash/.rvm/gems/ruby-1.9.3-p125/gems/cri-2.2.0/lib/cri/command_dsl.rb:175:in `block in runner'
  26. /Users/Crash/.rvm/gems/ruby-1.9.3-p125/gems/cri-2.2.0/lib/cri/command.rb:291:in `call'
  27. /Users/Crash/.rvm/gems/ruby-1.9.3-p125/gems/cri-2.2.0/lib/cri/command.rb:291:in `run_this'
  28. /Users/Crash/.rvm/gems/ruby-1.9.3-p125/gems/cri-2.2.0/lib/cri/command.rb:244:in `run'
  29. /Users/Crash/.rvm/gems/ruby-1.9.3-p125/gems/cri-2.2.0/lib/cri/command.rb:257:in `run'
  30. /Users/Crash/nanoc/lib/nanoc/cli.rb:44:in `block in run'
  31. /Users/Crash/nanoc/lib/nanoc/cli/error_handler.rb:42:in `handle_while'
  32. /Users/Crash/nanoc/lib/nanoc/cli/error_handler.rb:23:in `handle_while'
  33. /Users/Crash/nanoc/lib/nanoc/cli.rb:41:in `run'
  34. /Users/Crash/nanoc/bin/nanoc:12:in `<top (required)>'
  35. /Users/Crash/.rvm/gems/ruby-1.9.3-p125/bin/nanoc:19:in `load'
  36. /Users/Crash/.rvm/gems/ruby-1.9.3-p125/bin/nanoc:19:in `<main>'