src/catalogue/management/commands/build_stale.py

   1 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   2 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   3 #
   4 from time import time
   5 from django.conf import settings
   6 from django.core.management.base import BaseCommand
   7
   8 from catalogue.fields import EbookField
   9 from catalogue.models import Book
  10
  11
  12 class Command(BaseCommand):
  13     help = 'Schedule regenerating stale ebook files.'
  14
  15     def add_arguments(self, parser):
  16         parser.add_argument(
  17             '-l', '--limit', type=int,
  18             help='Limit number of files to build'
  19         )
  20         parser.add_argument(
  21             '-t', '--time', type=int, metavar='SECONDS',
  22             help='Limit timenumber of files to build'
  23         )
  24
  25     def handle(self, **options):
  26         t = time()
  27         counter = 0
  28         tasks = []
  29         while True:
  30             if options['time'] is not None and time() - t > options['time']:
  31                 break
  32             if options['limit'] is not None and counter >= options['limit']:
  33                 break
  34             if not tasks:
  35                 tasks = EbookField.find_all_stale(Book, options['limit'] or 100)
  36             if not tasks:
  37                 break
  38             field_name, book = tasks.pop(0)
  39             print(field_name, book)
  40             counter += 1
  41             try:
  42                 getattr(book, field_name).build()
  43             except Exception as e:
  44                 print('ERROR', e)