Class: Jekyll::PandocFile

Inherits:
Object
  • Object
show all
Includes:
Convertible
Defined in:
lib/jekyll-pandoc-multiple-formats/pandoc_file.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(site, format, posts, title = nil) ⇒ PandocFile

Returns a new instance of PandocFile.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 32

def initialize(site, format, posts, title = nil)
  @site   = site
  @config = JekyllPandocMultipleFormats::Config.new(@site.config['pandoc']).config
  @format = format
  @flags  = []

  if posts.is_a? Array
    @posts = posts

    raise ArgumentError.new "'title' argument is required for multipost file" unless title

    @title = title
  else
    @posts = [posts]
    @title = posts.data['title'] unless title
  end

  @slug = Utils.slugify(@title)
end

Instance Attribute Details

#config ⇒ Object (readonly)

Returns the value of attribute config.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 29

def config
  @config
end

#flags ⇒ Object (readonly)

Returns the value of attribute flags.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 29

def flags
  @flags
end

#format ⇒ Object (readonly)

Returns the value of attribute format.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 29

def format
  @format
end

#papersize ⇒ Object (readonly)

Returns the value of attribute papersize.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 30

def papersize
  @papersize
end

#posts ⇒ Object (readonly)

Returns the value of attribute posts.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 29

def posts
  @posts
end

#sheetsize ⇒ Object (readonly)

Returns the value of attribute sheetsize.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 30

def sheetsize
  @sheetsize
end

#signature ⇒ Object (readonly)

Returns the value of attribute signature.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 30

def signature
  @signature
end

#site ⇒ Object (readonly)

Returns the value of attribute site.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 29

def site
  @site
end

#slug ⇒ Object (readonly)

Returns the value of attribute slug.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 29

def slug
  @slug
end

#title ⇒ Object (readonly)

Returns the value of attribute title.



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 29

def title
  @title
end

#url ⇒ Object (readonly)

if it’s just one article, the url is the same except it’s not html otherwise we use the permalink template with some placeholder



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 74

def url
  @url
end

Instance Method Details

#binary? ⇒ Boolean

These formats are binary files and must use the -o flag

Returns:

  • (Boolean) 


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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 234

def binary?
  %w[pdf epub epub3 odt docx].include? @format
end

#command ⇒ Object 



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 221

def command
  'pandoc ' << flags
end

#content ⇒ Object 



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 132

def content
  if single_post?
    single_post.content
  else
    header_re = /^(#+.*\n*|.*\n[=-]+\n*)\Z/
    bib_title = ""
    @posts.map do |post|
      bib_title = post.content.match(header_re).to_s if bib_title.empty?
      # remove bibliography titles
      # since pandoc does it's own bibliography output, it recommends
      # leaving an empty chapter title to mark it as such
      post.content.gsub(header_re, '')
    # we add the first bibliography title we can find in the end
    end.join("\n\n\n") << bib_title
  end
end

#cover ⇒ Object

Returns a cover, without checking if it exists

It assumes covers are in PNG format



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 173

def cover
  if single_post? && single_post.data['cover']
    File.join(@site.config['source'], single_post.data['cover'])
  else
    File.join(@site.config['source'], @config['covers_dir'], "#{@slug}.png")
  end
end

#epub? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 229

def epub?
  %w[epub epub3].include? @format
end

#has_cover? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 242

def has_cover?
  File.exists? cover
end

#path ⇒ Object 



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 52

def path
  # path is full destination path with all elements of permalink
  path = @site.in_dest_dir(relative_path)
end

#pdf? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 225

def pdf?
  @format == 'pdf'
end

#pdf_cover ⇒ Object

Returns a PDF cover



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 182

def pdf_cover
  cover.gsub(/\.[^\.]+\Z/, '.pdf')
end

#pdf_cover! ⇒ Object 



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 186

def pdf_cover!
  if has_cover? && !File.exists?(pdf_cover)
    Open3::popen3("convert \"#{cover}\" \"#{pdf_cover}\"") do |stdin, stdout, stderr, thread|
      STDERR.print stderr.read

      # Wait for the process to finish
      thread.value
    end
  end

  File.exists?(pdf_cover)
end

#relative_path ⇒ Object 



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 57

def relative_path
  path = URL.unescape_path(url)
  path.gsub! /^\//, ''

  # but if the post is going to be index.html, use slug + format
  # (ie /year/month/slug/slug.pdf)
  if url.end_with? '/'
    path = File.join(path, @slug)
    path << '.'
    path << @format
  end

  path
end

#single_post? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 238

def single_post?
  @posts.count == 1
end

#url_placeholders ⇒ Object 



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 85

def url_placeholders
  { output_ext: @format,
    slug: @slug,
    title: @title }
end

#write ⇒ Object 



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 149

def write
  FileUtils.mkdir_p(File.dirname(path))
  # Remove the file before creating it
  FileUtils.rm_f(path)
  # Move to the source dir since everything will be relative to that
  Dir::chdir(@site.config['source']) do
    # Do the stuff
    Open3::popen3(command) do |stdin, stdout, stderr, thread|
      stdin.puts yaml_metadata
      stdin.puts content
      stdin.close
      STDERR.print stderr.read

      # Wait for the process to finish
      thread.value
    end
  end

  File.exists?(path)
end

#yaml_metadata ⇒ Object

adds post metadata as yaml metadata



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# File 'lib/jekyll-pandoc-multiple-formats/pandoc_file.rb', line 92

def yaml_metadata
  if single_post?

    # if we were to merge config to data, the default options would
    # take precedence
    data = Jekyll::Utils.deep_merge_hashes @config, single_post.data
    single_post.merge_data! data


    # we extract the excerpt because it serializes as an object and
    # breaks pandoc
    metadata = single_post.data.reject{ |k| k == 'excerpt' }

    if @config['date_format']
      metadata['date'] = metadata['date'].strftime(@config['date_format'])
    else
      metadata.delete('date')
    end
  else
    # we have to use this fugly syntax because jekyll doesn't do
    # symbols
    metadata = {
      'date'      => @config['date_format'] ? Date.today.strftime(@config['date_format']) : nil,
      'title'     => @title,
      'author'    => nil,
      'papersize' => papersize,
      'sheetsize' => sheetsize,
      'signature' => signature
    }
  end

  # fix page sizes, pandoc uses 'A4' while printer.rb uses
  # 'a4paper'
  %w[papersize sheetsize].each do |size|
    metadata[size] = fix_size metadata[size]
  end

  metadata.to_yaml << "\n---\n"
end