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 from __future__ import unicode_literals
   7
   8 from copy import deepcopy
   9 import os
  10 import subprocess
  11 from tempfile import NamedTemporaryFile
  12
  13 from librarian import OutputFile
  14
  15
  16 def transform(wldoc, verbose=False, sample=None, cover=None,
  17               use_kindlegen=False, flags=None, hyphenate=True, ilustr_path='',
  18               converter_path=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     converter_path: override path to MOBI converter,
  26       either ebook-convert or kindlegen
  27     """
  28
  29     document = deepcopy(wldoc)
  30     del wldoc
  31
  32     epub = document.as_epub(verbose=verbose, sample=sample,
  33                             html_toc=True, cover=cover or True, flags=flags,
  34                             hyphenate=hyphenate, ilustr_path=ilustr_path, output_type='mobi')
  35     if verbose:
  36         kwargs = {}
  37     else:
  38         devnull = open("/dev/null", 'w')
  39         kwargs = {"stdout": devnull, "stderr": devnull}
  40
  41     output_file = NamedTemporaryFile(prefix='librarian', suffix='.mobi',
  42                                      delete=False)
  43     output_file.close()
  44
  45     if use_kindlegen:
  46         output_file_basename = os.path.basename(output_file.name)
  47         subprocess.check_call([converter_path or 'kindlegen',
  48                                '-c2', epub.get_filename(),
  49                                '-o', output_file_basename], **kwargs)
  50     else:
  51         subprocess.check_call([converter_path or 'ebook-convert',
  52                                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)