librarian/mobi.py

   1 # -*- coding: utf-8 -*-
   2 #
   3 # This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
   4 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   5 #
   6
   7 from copy import deepcopy
   8 import os
   9 import subprocess
  10 from tempfile import NamedTemporaryFile
  11
  12 from librarian import OutputFile
  13 from librarian.cover import DefaultEbookCover
  14 from librarian import get_resource
  15
  16
  17 def transform(wldoc, verbose=False, sample=None, cover=None,
  18               use_kindlegen=False, flags=None):
  19     """ produces a MOBI file
  20
  21     wldoc: a WLDocument
  22     sample=n: generate sample e-book (with at least n paragraphs)
  23     cover: a cover.Cover factory overriding default
  24     flags: less-advertising,
  25     """
  26
  27     document = deepcopy(wldoc)
  28     del wldoc
  29     book_info = document.book_info
  30
  31     if not flags:
  32         flags = []
  33     flags = list(flags)
  34
  35     epub = document.as_epub(verbose=verbose, sample=sample,
  36                             html_toc=True, cover=True, flags=flags)
  37     if verbose:
  38         kwargs = {}
  39     else:
  40         devnull = open("/dev/null", 'w')
  41         kwargs = {"stdout": devnull, "stderr": devnull}
  42
  43     output_file = NamedTemporaryFile(prefix='librarian', suffix='.mobi',
  44                                      delete=False)
  45     output_file.close()
  46
  47     if use_kindlegen:
  48         output_file_basename = os.path.basename(output_file.name)
  49         subprocess.check_call(['kindlegen', '-c2', epub.get_filename(),
  50                               '-o', output_file_basename], **kwargs)
  51     else:
  52         subprocess.check_call(['ebook-convert', epub.get_filename(),
  53                                output_file.name, '--no-inline-toc',
  54                                '--mobi-file-type=both',
  55                                '--mobi-ignore-margins'], **kwargs)
  56     return OutputFile.from_filename(output_file.name)