# --------------------------------------------------------------------------- # # This script generates the guides. It can be invoked either directly or via the # generate_guides rake task within the railties directory. # # Guides are taken from the source directory, and the resulting HTML goes into the # output directory. Assets are stored under files, and copied to output/files as # part of the generation process. # # Some arguments may be passed via environment variables: # # WARNINGS # If you are writing a guide, please work always with WARNINGS=1. Users can # generate the guides, and thus this flag is off by default. # # Internal links (anchors) are checked. If a reference is broken levenshtein # distance is used to suggest an existing one. This is useful since IDs are # generated by Textile from headers and thus edits alter them. # # Also detects duplicated IDs. They happen if there are headers with the same # text. Please do resolve them, if any, so guides are valid XHTML. # # ALL # Set to "1" to force the generation of all guides. # # ONLY # Use ONLY if you want to generate only one or a set of guides. Prefixes are # enough: # # # generates only association_basics.html # ONLY=assoc ruby rails_guides.rb # # Separate many using commas: # # # generates only # ONLY=assoc,migrations ruby rails_guides.rb # # Note that if you are working on a guide generation will by default process # only that one, so ONLY is rarely used nowadays. # # EDGE # Set to "1" to indicate generated guides should be marked as edge. This # inserts a badge and changes the preamble of the home page. # # --------------------------------------------------------------------------- require 'set' require 'fileutils' require 'active_support/core_ext/string/output_safety' require 'action_controller' require 'action_view' require 'rails_guides/indexer' require 'rails_guides/helpers' require 'rails_guides/levenshtein' module RailsGuides class Generator attr_reader :guides_dir, :source_dir, :output_dir, :edge GUIDES_RE = /\.(?:textile|html\.erb)$/ def initialize(output=nil) initialize_dirs(output) create_output_dir_if_needed set_edge end def generate generate_guides copy_assets end private def initialize_dirs(output) @guides_dir = File.join(File.dirname(__FILE__), '..') @source_dir = File.join(@guides_dir, "source") @output_dir = output || File.join(@guides_dir, "output") end def create_output_dir_if_needed FileUtils.mkdir_p(output_dir) end def set_edge @edge = ENV['EDGE'] == '1' end def generate_guides guides_to_generate.each do |guide| output_file = output_file_for(guide) generate_guide(guide, output_file) if generate?(guide, output_file) end end def guides_to_generate guides = Dir.entries(source_dir).grep(GUIDES_RE) ENV.key?('ONLY') ? select_only(guides) : guides end def select_only(guides) prefixes = ENV['ONLY'].split(",").map(&:strip) guides.select do |guide| prefixes.any? {|p| guide.start_with?(p)} end end def copy_assets FileUtils.cp_r(File.join(guides_dir, 'images'), output_dir) FileUtils.cp_r(File.join(guides_dir, 'files'), output_dir) end def output_file_for(guide) guide.sub(GUIDES_RE, '.html') end def generate?(source_file, output_file) fin = File.join(source_dir, source_file) fout = File.join(output_dir, output_file) ENV['ALL'] == '1' || !File.exists?(fout) || File.mtime(fout) < File.mtime(fin) end def generate_guide(guide, output_file) puts "Generating #{output_file}" File.open(File.join(output_dir, output_file), 'w') do |f| view = ActionView::Base.new(source_dir, :edge => edge) view.extend(Helpers) if guide =~ /\.html\.erb$/ # Generate the special pages like the home. result = view.render(:layout => 'layout', :file => guide) else body = File.read(File.join(source_dir, guide)) body = set_header_section(body, view) body = set_index(body, view) result = view.render(:layout => 'layout', :text => textile(body)) warn_about_broken_links(result) if ENV['WARNINGS'] == '1' end f.write result end end def set_header_section(body, view) new_body = body.gsub(/(.*?)endprologue\./m, '').strip header = $1 header =~ /h2\.(.*)/ page_title = $1.strip header = textile(header) view.content_for(:page_title) { page_title.html_safe } view.content_for(:header_section) { header.html_safe } new_body end def set_index(body, view) index = <<-INDEX
#{es}
dirty_workaround_for_notextile_(\d+)
}) do |_| code_blocks[$1.to_i] end end def warn_about_broken_links(html) anchors = extract_anchors(html) check_fragment_identifiers(html, anchors) end def extract_anchors(html) # Textile generates headers with IDs computed from titles. anchors = Set.new html.scan(/