From ddf6bd19f557a8f546422da0c10c667dd623fc18 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 6 Apr 2011 10:50:55 -0600
Subject: [PATCH] Add a 'plugin tweak' test_eight_code which if set to True
 will cause calibre to use code intended for the 0.8.x series. Note that this
 code is in heavy development so only set this tweak if you are OK with having
 parts of calibre broken.

---
 src/calibre/customize/builtins.py | 26 ++++++++++++++++----------
 src/calibre/utils/config.py       |  1 +
 2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/src/calibre/customize/builtins.py b/src/calibre/customize/builtins.py
index 91abfacc95..93cdfe50d9 100644
--- a/src/calibre/customize/builtins.py
+++ b/src/calibre/customize/builtins.py
@@ -10,6 +10,7 @@ from calibre.constants import numeric_version
 from calibre.ebooks.metadata.archive import ArchiveExtract, get_cbz_metadata
 from calibre.ebooks.metadata.opf2 import metadata_to_opf
 from calibre.ebooks.oeb.base import OEB_IMAGES
+from calibre.utils.config import test_eight_code
 
 # To archive plugins {{{
 class HTML2ZIP(FileTypePlugin):
@@ -612,20 +613,25 @@ from calibre.devices.folder_device.driver import FOLDER_DEVICE_FOR_CONFIG
 from calibre.devices.kobo.driver import KOBO
 from calibre.devices.bambook.driver import BAMBOOK
 
-from calibre.ebooks.metadata.fetch import GoogleBooks, ISBNDB, Amazon, \
-    KentDistrictLibrary
-from calibre.ebooks.metadata.douban import DoubanBooks
-from calibre.ebooks.metadata.nicebooks import NiceBooks, NiceBooksCovers
-from calibre.ebooks.metadata.covers import OpenLibraryCovers, \
-        AmazonCovers, DoubanCovers
 from calibre.library.catalog import CSV_XML, EPUB_MOBI, BIBTEX
 from calibre.ebooks.epub.fix.unmanifested import Unmanifested
 from calibre.ebooks.epub.fix.epubcheck import Epubcheck
 
-plugins = [HTML2ZIP, PML2PMLZ, TXT2TXTZ, ArchiveExtract, GoogleBooks, ISBNDB, Amazon,
-        KentDistrictLibrary, DoubanBooks, NiceBooks, CSV_XML, EPUB_MOBI, BIBTEX, Unmanifested,
-        Epubcheck, OpenLibraryCovers, AmazonCovers, DoubanCovers,
-        NiceBooksCovers]
+plugins = [HTML2ZIP, PML2PMLZ, TXT2TXTZ, ArchiveExtract, CSV_XML, EPUB_MOBI, BIBTEX, Unmanifested,
+        Epubcheck, ]
+
+if not test_eight_code:
+    from calibre.ebooks.metadata.fetch import GoogleBooks, ISBNDB, Amazon, \
+        KentDistrictLibrary
+    from calibre.ebooks.metadata.douban import DoubanBooks
+    from calibre.ebooks.metadata.nicebooks import NiceBooks, NiceBooksCovers
+    from calibre.ebooks.metadata.covers import OpenLibraryCovers, \
+            AmazonCovers, DoubanCovers
+
+    plugins += [GoogleBooks, ISBNDB, Amazon,
+        OpenLibraryCovers, AmazonCovers, DoubanCovers,
+        NiceBooksCovers, KentDistrictLibrary, DoubanBooks, NiceBooks]
+
 plugins += [
     ComicInput,
     EPUBInput,
diff --git a/src/calibre/utils/config.py b/src/calibre/utils/config.py
index d5a489acf1..66316d051b 100644
--- a/src/calibre/utils/config.py
+++ b/src/calibre/utils/config.py
@@ -784,6 +784,7 @@ def write_tweaks(raw):
 
 
 tweaks = read_tweaks()
+test_eight_code = tweaks.get('test_eight_code', False)
 
 def migrate():
     if hasattr(os, 'geteuid') and os.geteuid() == 0: