-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-#
-# This file is part of Librarian, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
-#
-import os.path
-import optparse
-
-from librarian import DirDocProvider, ParseError
-from librarian.parser import WLDocument
-from librarian.cover import make_cover
-
-
-class Option(object):
- """Option for optparse. Use it like `optparse.OptionParser.add_option`."""
- def __init__(self, *names, **options):
- self.names = names
- self.options = options
-
- def add(self, parser):
- parser.add_option(*self.names, **self.options)
-
- def name(self):
- return self.options['dest']
-
- def value(self, options):
- return getattr(options, self.name())
-
-
-class Book2Anything(object):
- """A class for creating book2... scripts.
-
- Subclass it for any format you want to convert to.
- """
- format_name = None # Set format name, like "PDF".
- ext = None # Set file extension, like "pdf".
- uses_cover = False # Can it add a cover?
- cover_optional = True # Only relevant if uses_cover
- uses_provider = False # Does it need a DocProvider?
- transform = None # Transform method. Uses WLDocument.as_{ext} by default.
- parser_options = [] # List of Option objects for additional parser args.
- transform_options = [] # List of Option objects for additional transform args.
- transform_flags = [] # List of Option objects for supported transform flags.
-
- @classmethod
- def run(cls):
- # Parse commandline arguments
- usage = """Usage: %%prog [options] SOURCE [SOURCE...]
- Convert SOURCE files to %s format.""" % cls.format_name
-
- parser = optparse.OptionParser(usage=usage)
-
- parser.add_option('-v', '--verbose', action='store_true', dest='verbose', default=False,
- help='print status messages to stdout')
- parser.add_option('-d', '--make-dir', action='store_true', dest='make_dir', default=False,
- help='create a directory for author and put the output file in it')
- parser.add_option('-o', '--output-file', dest='output_file', metavar='FILE',
- help='specifies the output file')
- parser.add_option('-O', '--output-dir', dest='output_dir', metavar='DIR',
- help='specifies the directory for output')
- if cls.uses_cover:
- if cls.cover_optional:
- parser.add_option('-c', '--with-cover', action='store_true', dest='with_cover', default=False,
- help='create default cover')
- parser.add_option('-C', '--image-cache', dest='image_cache', metavar='URL',
- help='prefix for image download cache' +
- (' (implies --with-cover)' if cls.cover_optional else ''))
- for option in cls.parser_options + cls.transform_options + cls.transform_flags:
- option.add(parser)
-
- options, input_filenames = parser.parse_args()
-
- if len(input_filenames) < 1:
- parser.print_help()
- return 1
-
- # Prepare additional args for parser.
- parser_args = {}
- for option in cls.parser_options:
- parser_args[option.name()] = option.value(options)
- # Prepare additional args for transform method.
- transform_args = {}
- for option in cls.transform_options:
- transform_args[option.name()] = option.value(options)
- # Add flags to transform_args, if any.
- transform_flags = [flag.name() for flag in cls.transform_flags if flag.value(options)]
- if transform_flags:
- transform_args['flags'] = transform_flags
- if options.verbose:
- transform_args['verbose'] = True
- # Add cover support, if any.
- if cls.uses_cover:
- if options.image_cache:
- def cover_class(book_info, *args, **kwargs):
- return make_cover(book_info, image_cache=options.image_cache, *args, **kwargs)
- transform_args['cover'] = cover_class
- elif not cls.cover_optional or options.with_cover:
- transform_args['cover'] = make_cover
-
- # Do some real work
- try:
- for main_input in input_filenames:
- if options.verbose:
- print main_input
-
- # Where to find input?
- if cls.uses_provider:
- path, fname = os.path.realpath(main_input).rsplit('/', 1)
- provider = DirDocProvider(path)
- else:
- provider = None
-
- # Where to write output?
- if not (options.output_file or options.output_dir):
- output_file = os.path.splitext(main_input)[0] + '.' + cls.ext
- else:
- output_file = options.output_file
-
- # Do the transformation.
- doc = WLDocument.from_file(main_input, provider=provider, **parser_args)
- transform = cls.transform
- if transform is None:
- transform = getattr(WLDocument, 'as_%s' % cls.ext)
- output = transform(doc, **transform_args)
-
- doc.save_output_file(output, output_file, options.output_dir, options.make_dir, cls.ext)
-
- except ParseError, e:
- print '%(file)s:%(name)s:%(message)s' % {
- 'file': main_input,
- 'name': e.__class__.__name__,
- 'message': e
- }
fnp / librarian.git / blobdiff