117 lines
3.9 KiB
Ruby
117 lines
3.9 KiB
Ruby
#!/usr/bin/env ruby
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# frozen_string_literal: true
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require "kindlerb"
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require "nokogiri"
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require "fileutils"
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require "yaml"
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require "date"
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module Kindle
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extend self
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def generate(output_dir, mobi_outfile, logfile)
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output_dir = File.absolute_path(output_dir)
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Dir.chdir output_dir do
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puts "=> Using output dir: #{output_dir}"
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puts "=> Arranging html pages in document order"
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toc = File.read("toc.ncx")
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doc = Nokogiri::XML(toc).xpath("//ncx:content", "ncx" => "http://www.daisy.org/z3986/2005/ncx/")
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html_pages = doc.select { |c| c[:src] }.map { |c| c[:src] }.uniq
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generate_front_matter(html_pages)
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generate_sections(html_pages)
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generate_document_metadata(mobi_outfile)
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puts "Creating MOBI document with kindlegen. This may take a while."
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if Kindlerb.run(output_dir)
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puts "MOBI document generated at #{File.expand_path(mobi_outfile, output_dir)}"
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end
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end
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end
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def generate_front_matter(html_pages)
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frontmatter = []
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html_pages.delete_if { |x|
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if /(toc|welcome|copyright).html/.match?(x)
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frontmatter << x unless /toc/.match?(x)
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true
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end
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}
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html = frontmatter.map { |x|
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Nokogiri::HTML(File.open(x)).at("body").inner_html
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}.join("\n")
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fdoc = Nokogiri::HTML(html)
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fdoc.search("h3").each do |h3|
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h3.name = "h4"
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end
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fdoc.search("h2").each do |h2|
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h2.name = "h3"
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h2["id"] = h2.inner_text.gsub(/\s/, "-")
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end
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add_head_section fdoc, "Front Matter"
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File.open("frontmatter.html", "w") { |f| f.puts fdoc.to_html }
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html_pages.unshift "frontmatter.html"
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end
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def generate_sections(html_pages)
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FileUtils.rm_rf("sections/")
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html_pages.each_with_index do |page, section_idx|
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FileUtils.mkdir_p("sections/%03d" % section_idx)
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doc = Nokogiri::HTML(File.open(page))
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title = doc.at("title").inner_text.gsub("Ruby on Rails Guides: ", "")
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title = page.capitalize.gsub(".html", "") if title.strip == ""
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File.open("sections/%03d/_section.txt" % section_idx, "w") { |f| f.puts title }
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doc.xpath("//h3[@id]").each_with_index do |h3, item_idx|
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subsection = h3.inner_text
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content = h3.xpath("./following-sibling::*").take_while { |x| x.name != "h3" }.map(&:to_html)
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item = Nokogiri::HTML(h3.to_html + content.join("\n"))
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item_path = "sections/%03d/%03d.html" % [section_idx, item_idx]
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add_head_section(item, subsection)
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item.search("img").each do |img|
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img["src"] = "#{Dir.pwd}/#{img['src']}"
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end
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item.xpath("//li/p").each { |p| p.swap(p.children); p.remove }
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File.open(item_path, "w") { |f| f.puts item.to_html }
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end
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end
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end
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def generate_document_metadata(mobi_outfile)
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puts "=> Generating _document.yml"
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x = Nokogiri::XML(File.open("rails_guides.opf")).remove_namespaces!
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cover_jpg = "#{Dir.pwd}/images/rails_guides_kindle_cover.jpg"
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cover_gif = cover_jpg.sub(/jpg$/, "gif")
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puts `convert #{cover_jpg} #{cover_gif}`
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document = {
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"doc_uuid" => x.at("package")["unique-identifier"],
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"title" => x.at("title").inner_text.gsub(/\(.*$/, " v2"),
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"publisher" => x.at("publisher").inner_text,
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"author" => x.at("creator").inner_text,
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"subject" => x.at("subject").inner_text,
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"date" => x.at("date").inner_text,
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"cover" => cover_gif,
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"masthead" => nil,
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"mobi_outfile" => mobi_outfile
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}
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puts document.to_yaml
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File.open("_document.yml", "w") { |f| f.puts document.to_yaml }
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end
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def add_head_section(doc, title)
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head = Nokogiri::XML::Node.new "head", doc
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title_node = Nokogiri::XML::Node.new "title", doc
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title_node.content = title
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title_node.parent = head
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css = Nokogiri::XML::Node.new "link", doc
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css["rel"] = "stylesheet"
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css["type"] = "text/css"
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css["href"] = "#{Dir.pwd}/stylesheets/kindle.css"
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css.parent = head
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doc.at("body").before head
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end
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end
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