Class: ReVIEW::EPUBMaker

Inherits:
Object show all
Includes:
CallHook, Loggable, MakerHelper
Defined in:
lib/review/epubmaker.rb,
lib/review/epubmaker/epubv2.rb,
lib/review/epubmaker/epubv3.rb,
lib/review/epubmaker/content.rb,
lib/review/epubmaker/producer.rb,
lib/review/epubmaker/epubcommon.rb,
lib/review/epubmaker/zip_exporter.rb,
lib/review/epubmaker/reviewheaderlistener.rb

Defined Under Namespace

Classes: Content, EPUBCommon, EPUBv2, EPUBv3, Producer, ReVIEWHeaderListener, ZipExporter

Instance Attribute Summary

Attributes included from Loggable

#logger

Class Method Summary collapse

Instance Method Summary collapse

Methods included from CallHook

#call_hook

Methods included from Loggable

#app_error, #debug, #error, #error!, #warn

Methods included from MakerHelper

copy_images_to_dir, h

Constructor Details

#initialize ⇒ EPUBMaker

Returns a new instance of EPUBMaker.



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# File 'lib/review/epubmaker.rb', line 39

def initialize
  @producer = nil
  @htmltoc = nil
  @buildlogtxt = 'build-log.txt'
  @logger = ReVIEW.logger
  @img_math = nil
  @img_graph = nil
  @basedir = nil
end

Class Method Details

.execute(*args) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 49

def self.execute(*args)
  self.new.execute(*args)
end

Instance Method Details

#build_body(basetmpdir, yamlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 279

def build_body(basetmpdir, yamlfile)
  @precount = 0
  @bodycount = 0
  @postcount = 0

  @manifeststr = ''
  @ncxstr = ''
  @tocdesc = []
  @img_graph = ReVIEW::ImgGraph.new(@config, 'html', path_name: '_review_graph')

  basedir = File.dirname(yamlfile)
  base_path = Pathname.new(basedir)
  book = ReVIEW::Book::Base.new(basedir, config: @config)
  @converter = ReVIEW::Converter.new(book, ReVIEW::HTMLBuilder.new(img_math: @img_math, img_graph: @img_graph))
  @compile_errors = nil

  book.parts.each do |part|
    if part.name.present?
      if part.file?
        build_chap(part, base_path, basetmpdir, true)
      else
        htmlfile = "part_#{part.number}.#{@config['htmlext']}"
        build_part(part, basetmpdir, htmlfile)
        title = ReVIEW::I18n.t('part', part.number)
        if part.name.strip.present?
          title += ReVIEW::I18n.t('chapter_postfix') + part.name.strip
        end
        @htmltoc.add_item(0, htmlfile, title, chaptype: 'part')
        write_buildlogtxt(basetmpdir, htmlfile, '')
      end
    end

    part.chapters.each do |chap|
      build_chap(chap, base_path, basetmpdir, false)
    end
  end
  check_compile_status

  begin
    @img_graph.make_mermaid_images
  rescue ApplicationError => e
    error! e.message
  end
  @img_graph.cleanup_graphimg
end

#build_chap(chap, base_path, basetmpdir, ispart) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 357

def build_chap(chap, base_path, basetmpdir, ispart)
  chaptype = 'body'
  if ispart
    chaptype = 'part'
  elsif chap.on_predef?
    chaptype = 'pre'
  elsif chap.on_appendix?
    chaptype = 'appendix'
  elsif chap.on_postdef?
    chaptype = 'post'
  end

  filename =
    if ispart.present?
      chap.path
    else
      Pathname.new(chap.path).relative_path_from(base_path).to_s
    end

  id = File.basename(filename).sub(/\.re\Z/, '')

  if @config['epubmaker']['rename_for_legacy'] && ispart.nil?
    if chap.on_predef?
      @precount += 1
      id = sprintf('pre%02d', @precount)
    elsif chap.on_appendix?
      @postcount += 1
      id = sprintf('post%02d', @postcount)
    else
      @bodycount += 1
      id = sprintf('chap%02d', @bodycount)
    end
  end

  if @buildonly && !@buildonly.include?(id)
    warn "skip #{id}.re"
    return
  end

  htmlfile = "#{id}.#{@config['htmlext']}"
  write_buildlogtxt(basetmpdir, htmlfile, filename)
  debug("Create #{htmlfile} from #{filename}.")

  if @config['params'].present?
    warn %Q('params:' in config.yml is obsoleted.)
    if /stylesheet=/.match?(@config['params'])
      warn %Q(stylesheets should be defined in 'stylesheet:', not in 'params:')
    end
  end
  begin
    @converter.convert(filename, File.join(basetmpdir, htmlfile))
    write_info_body(basetmpdir, id, htmlfile, ispart, chaptype)
    remove_hidden_title(basetmpdir, htmlfile)
  rescue StandardError => e
    @compile_errors = true
    error "compile error in #{filename} (#{e.class})"
    error e.message
  end
end

#build_part(part, basetmpdir, htmlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 325

def build_part(part, basetmpdir, htmlfile)
  debug("Create #{htmlfile} from a template.")
  File.open(File.join(basetmpdir, htmlfile), 'w') do |f|
    @part_number = part.number
    @part_title = part.name.strip
    @title = @part_title
    @body = ReVIEW::Template.generate(path: template_name(localfile: '_part_body.html.erb', systemfile: 'html/_part_body.html.erb'), binding: binding)
    @language = @producer.config['language']
    @stylesheets = @producer.config['stylesheet']
    f.write ReVIEW::Template.generate(path: template_name, binding: binding)
  end
end

#build_path ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 108

def build_path
  if @config['debug']
    path = File.expand_path("#{@config['bookname']}-epub", Dir.pwd)
    FileUtils.rm_rf(path, secure: true)
    Dir.mkdir(path)
    path
  else
    Dir.mktmpdir("#{@config['bookname']}-epub-")
  end
end

#build_titlepage(basetmpdir, htmlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 570

def build_titlepage(basetmpdir, htmlfile)
  @title = h(@config.name_of('booktitle'))
  File.open(File.join(basetmpdir, htmlfile), 'w') do |f|
    @body = ReVIEW::Template.generate(path: template_name(localfile: '_titlepage.html.erb', systemfile: 'html/_titlepage.html.erb'), binding: binding)
    @language = @producer.config['language']
    @stylesheets = @producer.config['stylesheet']

    f.write ReVIEW::Template.generate(path: template_name, binding: binding)
  end
end

#check_compile_status ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 273

def check_compile_status
  return unless @compile_errors

  error! 'compile error, No EPUB file output.'
end

#check_image_size(basetmpdir, maxpixels, allow_exts = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 625

def check_image_size(basetmpdir, maxpixels, allow_exts = nil)
  begin
    require 'image_size'
  rescue LoadError
    return nil
  end
  require 'find'
  allow_exts ||= @config['image_ext']

  pat = '\\.(' + allow_exts.delete_if { |t| %w[ttf woff otf].member?(t.downcase) }.join('|') + ')'
  extre = Regexp.new(pat, Regexp::IGNORECASE)
  Find.find(basetmpdir) do |fname|
    next unless fname.match(extre)

    img = ImageSize.path(fname)
    next if img.width.nil? || img.width * img.height <= maxpixels

    h = Math.sqrt(img.height * maxpixels / img.width)
    w = maxpixels / h
    fname.sub!("#{basetmpdir}/", '')
    warn "#{fname}: #{img.width}x#{img.height} exceeds a limit. suggeted value is #{w.to_i}x#{h.to_i}"
  end

  true
end

#copy_backmatter(basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 581

def copy_backmatter(basetmpdir)
  if @config['profile']
    copy_static_file('profile', basetmpdir)
    @htmltoc.add_item(1,
                      File.basename(@config['profile']),
                      ReVIEW::I18n.t('profiletitle'),
                      chaptype: 'post')
  end

  if @config['advfile']
    copy_static_file('advfile', basetmpdir)
    @htmltoc.add_item(1,
                      File.basename(@config['advfile']),
                      ReVIEW::I18n.t('advtitle'),
                      chaptype: 'post')
  end

  if @config['colophon']
    if @config['colophon'].is_a?(String)
      copy_static_file('colophon', basetmpdir, destfilename: "colophon.#{@config['htmlext']}") # override pre-built colophon
    end
    @htmltoc.add_item(1,
                      "colophon.#{@config['htmlext']}",
                      ReVIEW::I18n.t('colophontitle'),
                      chaptype: 'post')
  end

  if @config['backcover']
    copy_static_file('backcover', basetmpdir)
    @htmltoc.add_item(1,
                      File.basename(@config['backcover']),
                      ReVIEW::I18n.t('backcovertitle'),
                      chaptype: 'post')
  end

  true
end

#copy_frontmatter(basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 534

def copy_frontmatter(basetmpdir)
  if @config['cover'].present? && File.exist?(@config['cover'])
    copy_static_file('cover', basetmpdir)
  end

  if @config['titlepage']
    if @config['titlefile'].nil?
      build_titlepage(basetmpdir, "titlepage.#{@config['htmlext']}")
    else
      copy_static_file('titlefile', basetmpdir, destfilename: "titlepage.#{@config['htmlext']}")
    end
    @htmltoc.add_item(1,
                      "titlepage.#{@config['htmlext']}",
                      ReVIEW::I18n.t('titlepagetitle'),
                      chaptype: 'pre')
  end

  if @config['originaltitlefile'].present?
    copy_static_file('originaltitlefile', basetmpdir)
    @htmltoc.add_item(1,
                      File.basename(@config['originaltitlefile']),
                      ReVIEW::I18n.t('originaltitle'),
                      chaptype: 'pre')
  end

  if @config['creditfile'].present?
    copy_static_file('creditfile', basetmpdir)
    @htmltoc.add_item(1,
                      File.basename(@config['creditfile']),
                      ReVIEW::I18n.t('credittitle'),
                      chaptype: 'pre')
  end

  true
end

#copy_images(resdir, destdir, allow_exts = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 226

def copy_images(resdir, destdir, allow_exts = nil)
  return nil unless File.exist?(resdir)

  allow_exts ||= @config['image_ext']
  FileUtils.mkdir_p(destdir)
  if @config['epubmaker']['verify_target_images'].present?
    @config['epubmaker']['force_include_images'].each do |file|
      unless File.exist?(file)
        unless /\Ahttps?:/.match?(file)
          warn "#{file} is not found, skip."
        end
        next
      end
      basedir = File.dirname(file)
      FileUtils.mkdir_p(File.join(destdir, basedir))
      debug("Copy #{file} to the temporary directory.")
      FileUtils.cp(file, File.join(destdir, basedir), preserve: true)
    end
  else
    recursive_copy_files(resdir, destdir, allow_exts)
  end
end

#copy_resources(resdir, destdir, allow_exts = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 249

def copy_resources(resdir, destdir, allow_exts = nil)
  return nil unless File.exist?(resdir)

  allow_exts ||= @config['image_ext']
  FileUtils.mkdir_p(destdir)
  recursive_copy_files(resdir, destdir, allow_exts)
end

#copy_static_file(configname, destdir, destfilename: nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 525

def copy_static_file(configname, destdir, destfilename: nil)
  destfilename ||= @config[configname]
  unless File.exist?(@config[configname])
    error! "#{configname}: #{@config[configname]} is not found."
  end
  FileUtils.cp(@config[configname],
               File.join(destdir, destfilename), preserve: true)
end

#copy_stylesheet(basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 513

def copy_stylesheet(basetmpdir)
  return if @config['stylesheet'].empty?

  @config['stylesheet'].each do |sfile|
    unless File.exist?(sfile)
      error! "stylesheet: #{sfile} is not found."
    end
    FileUtils.cp(sfile, basetmpdir, preserve: true)
    @producer.contents.push(ReVIEW::EPUBMaker::Content.new(file: sfile))
  end
end

#detect_properties(path) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 428

def detect_properties(path)
  properties = []
  File.open(path) do |f|
    doc = REXML::Document.new(f)
    if REXML::XPath.first(doc, '//m:math', 'm' => 'http://www.w3.org/1998/Math/MathML')
      properties << 'mathml'
    end
    if REXML::XPath.first(doc, '//s:svg', 's' => 'http://www.w3.org/2000/svg')
      properties << 'svg'
    end
  end
  properties
end

#execute(*args) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 76

def execute(*args)
  cmd_config, yamlfile, exportfile = parse_opts(args)
  error! "#{yamlfile} not found." unless File.exist?(yamlfile)

  begin
    @config = ReVIEW::Configure.create(maker: 'epubmaker',
                                       yamlfile: yamlfile,
                                       config: cmd_config)
  rescue ReVIEW::ConfigError => e
    error! e.message
  end
  @producer = ReVIEW::EPUBMaker::Producer.new(@config)
  update_log_level
  debug("Loaded yaml file (#{yamlfile}).")
  @basedir = File.absolute_path(File.dirname(yamlfile))

  produce(yamlfile, exportfile)
end

#parse_headlines(path) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 442

def parse_headlines(path)
  headlines = []

  File.open(path) do |htmlio|
    REXML::Document.parse_stream(htmlio, ReVIEWHeaderListener.new(headlines))
  end

  headlines
end

#parse_opts(args) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 53

def parse_opts(args)
  cmd_config = {}
  opts = OptionParser.new
  @buildonly = nil

  opts.banner = 'Usage: review-epubmaker [options] configfile [export_filename]'
  opts.version = ReVIEW::VERSION
  opts.on('--help', 'Prints this message and quit.') do
    puts opts.help
    exit 0
  end
  opts.on('--[no-]debug', 'Keep temporary files.') { |debug| cmd_config['debug'] = debug }
  opts.on('-y', '--only file1,file2,...', 'Build only specified files.') { |v| @buildonly = v.split(/\s*,\s*/).map { |m| m.strip.sub(/\.re\Z/, '') } }

  opts.parse!(args)
  if args.size < 1 || args.size > 2
    puts opts.help
    exit 0
  end

  [cmd_config, args[0], args[1]]
end

#produce(yamlfile, bookname = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 119

def produce(yamlfile, bookname = nil)
  I18n.setup(@config['language'])
  bookname ||= @config['bookname']
  booktmpname = "#{bookname}-epub"

  @img_math = ReVIEW::ImgMath.new(@config)
  begin
    @config.check_version(ReVIEW::VERSION, exception: true)
  rescue ReVIEW::ConfigError => e
    warn e.message
  end
  debug("#{bookname}.epub will be created.")

  FileUtils.rm_f("#{bookname}.epub")
  if @config['debug']
    FileUtils.rm_rf(booktmpname)
  end

  @img_math.cleanup_mathimg

  basetmpdir = build_path
  begin
    debug("Created first temporary directory as #{basetmpdir}.")

    call_hook('hook_beforeprocess', basetmpdir, base_dir: @basedir)

    @htmltoc = ReVIEW::HTMLToc.new(basetmpdir)
    ## copy all files into basetmpdir
    copy_stylesheet(basetmpdir)

    copy_frontmatter(basetmpdir)
    call_hook('hook_afterfrontmatter', basetmpdir, base_dir: @basedir)

    build_body(basetmpdir, yamlfile)
    call_hook('hook_afterbody', basetmpdir, base_dir: @basedir)

    copy_backmatter(basetmpdir)

    if @config['math_format'] == 'imgmath'
      @img_math.make_math_images
    end
    call_hook('hook_afterbackmatter', basetmpdir, base_dir: @basedir)

    ## push contents in basetmpdir into @producer
    push_contents(basetmpdir)

    if @config['epubmaker']['verify_target_images'].present?
      verify_target_images(basetmpdir)
      copy_images(@config['imagedir'], basetmpdir)
    else
      copy_images(@config['imagedir'], File.join(basetmpdir, @config['imagedir']))
    end

    copy_resources('covers', File.join(basetmpdir, @config['imagedir']))
    copy_resources('adv', File.join(basetmpdir, @config['imagedir']))
    copy_resources(@config['fontdir'], File.join(basetmpdir, 'fonts'), @config['font_ext'])

    call_hook('hook_aftercopyimage', basetmpdir, base_dir: @basedir)

    @producer.import_imageinfo(File.join(basetmpdir, @config['imagedir']), basetmpdir)
    @producer.import_imageinfo(File.join(basetmpdir, 'fonts'), basetmpdir, @config['font_ext'])

    check_image_size(basetmpdir, @config['image_maxpixels'], @config['image_ext'])

    epubtmpdir = nil
    if @config['debug'].present?
      epubtmpdir = File.join(basetmpdir, booktmpname)
      Dir.mkdir(epubtmpdir)
    end
    debug('Call ePUB producer.')
    @producer.produce("#{bookname}.epub", basetmpdir, epubtmpdir, base_dir: @basedir)
    debug('Finished.')
    @logger.success("built #{bookname}.epub")
  rescue ApplicationError => e
    raise if @config['debug']

    error! e.message
  ensure
    FileUtils.remove_entry_secure(basetmpdir) unless @config['debug']
  end
end

#push_contents(_basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 490

def push_contents(_basetmpdir)
  @htmltoc.each_item do |level, file, title, args|
    next if level.to_i > @config['toclevel'] && args[:force_include].nil?

    debug("Push #{file} to ePUB contents.")

    params = { file: file,
               level: level.to_i,
               title: title,
               chaptype: args[:chaptype] }
    if args[:id].present?
      params[:id] = args[:id]
    end
    if args[:properties].present?
      params[:properties] = args[:properties].split(' ') # rubocop:disable Style/RedundantArgument
    end
    if args[:notoc].present?
      params[:notoc] = args[:notoc]
    end
    @producer.contents.push(ReVIEW::EPUBMaker::Content.new(**params))
  end
end

#recursive_copy_files(resdir, destdir, allow_exts) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 257

def recursive_copy_files(resdir, destdir, allow_exts)
  Dir.open(resdir) do |dir|
    dir.each do |fname|
      next if fname.start_with?('.')

      if FileTest.directory?(File.join(resdir, fname))
        recursive_copy_files(File.join(resdir, fname), File.join(destdir, fname), allow_exts)
      elsif /\.(#{allow_exts.join('|')})\Z/i.match?(fname)
        FileUtils.mkdir_p(destdir)
        debug("Copy #{resdir}/#{fname} to the temporary directory.")
        FileUtils.cp(File.join(resdir, fname), destdir, preserve: true)
      end
    end
  end
end

#remove_hidden_title(basetmpdir, htmlfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 417

def remove_hidden_title(basetmpdir, htmlfile)
  File.open(File.join(basetmpdir, htmlfile), 'r+') do |f|
    body = f.read.
           gsub(%r{<h\d .*?hidden=['"]true['"].*?>.*?</h\d>\n}, '').
           gsub(%r{(<h\d .*?)\s*notoc=['"]true['"]\s*(.*?>.*?</h\d>\n)}, '\1\2')
    f.rewind
    f.print body
    f.truncate(f.tell)
  end
end

#template_name(localfile: 'layout.html.erb', systemfile: nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 338

def template_name(localfile: 'layout.html.erb', systemfile: nil)
  if @basedir
    layoutfile = File.join(@basedir, 'layouts', localfile)
    if File.exist?(layoutfile)
      return layoutfile
    end
  end

  if systemfile
    return systemfile
  end

  if @producer.config['htmlversion'].to_i == 5
    './html/layout-html5.html.erb'
  else
    './html/layout-xhtml1.html.erb'
  end
end

#update_log_level ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 95

def update_log_level
  if @config['debug']
    if @logger.ttylogger?
      ReVIEW.logger = nil
      @logger = ReVIEW.logger(level: 'debug')
    else
      @logger.level = Logger::DEBUG
    end
  elsif !@logger.ttylogger?
    @logger.level = Logger::INFO
  end
end

#verify_target_images(basetmpdir) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 201

def verify_target_images(basetmpdir)
  @producer.contents.each do |content|
    case content.media
    when 'application/xhtml+xml'
      File.open("#{basetmpdir}/#{content.file}") do |f|
        REXML::Document.new(File.new(f)).each_element('//img') do |e|
          @config['epubmaker']['force_include_images'].push(e.attributes['src'])
          if e.attributes['src'] =~ /svg\Z/i
            content.properties.push('svg')
          end
        end
      end
    when 'text/css'
      File.open(File.join(basetmpdir, content.file)) do |f|
        f.each_line do |l|
          l.scan(/url\((.+?)\)/) do |_m|
            @config['epubmaker']['force_include_images'].push($1.strip)
          end
        end
      end
    end
  end
  @config['epubmaker']['force_include_images'] = @config['epubmaker']['force_include_images'].compact.sort.uniq
end

#write_buildlogtxt(basetmpdir, htmlfile, reviewfile) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 619

def write_buildlogtxt(basetmpdir, htmlfile, reviewfile)
  File.open(File.join(basetmpdir, @buildlogtxt), 'a') do |f|
    f.puts "#{htmlfile},#{reviewfile}"
  end
end

#write_info_body(basetmpdir, _id, filename, ispart = nil, chaptype = nil) ⇒ Object 



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# File 'lib/review/epubmaker.rb', line 452

def write_info_body(basetmpdir, _id, filename, ispart = nil, chaptype = nil)
  path = File.join(basetmpdir, filename)
  headlines = parse_headlines(path)

  if headlines.empty?
    warn "#{filename} is discarded because there is no heading. Use `=[notoc]' or `=[nodisp]' to exclude headlines from the table of contents."
    return
  end

  properties = detect_properties(path)
  prop_str = if properties.present?
               ',properties=' + properties.join(' ')
             else
               ''
             end
  first = true
  headlines.each do |headline|
    if ispart.present? && headline['level'] == 1
      headline['level'] = 0
    end
    if first.nil?
      @htmltoc.add_item(headline['level'],
                        filename + '#' + headline['id'],
                        headline['title'],
                        { chaptype: chaptype,
                          notoc: headline['notoc'] })
    else
      @htmltoc.add_item(headline['level'],
                        filename,
                        headline['title'],
                        { force_include: true,
                          chaptype: chaptype + prop_str,
                          notoc: headline['notoc'] })
      first = nil
    end
  end
end