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Catalog generation: Work on a copy of the library database so as not to lock it

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Kovid Goyal 2011-01-02 12:59:33 -07:00
parent 547cee660c
commit 7c084b0630
3 changed files with 12 additions and 4 deletions
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2
src/calibre/gui2/convert/gui_conversion.py
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@ -30,7 +30,7 @@ def gui_catalog(fmt, title, dbspec, ids, out_file_name, sync, fmt_options, conne
from calibre.library import db from calibre.library import db
from calibre.utils.config import prefs from calibre.utils.config import prefs
prefs.refresh() prefs.refresh()
db = db() db = db(read_only=True)
db.catalog_plugin_on_device_temp_mapping = dbspec db.catalog_plugin_on_device_temp_mapping = dbspec
# Create a minimal OptionParser that we can append to # Create a minimal OptionParser that we can append to

5
src/calibre/library/__init__.py
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@ -2,10 +2,11 @@ __license__ = 'GPL v3'
__copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>' __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
''' Code to manage ebook library''' ''' Code to manage ebook library'''
def db(path=None): def db(path=None, read_only=False):
from calibre.library.database2 import LibraryDatabase2 from calibre.library.database2 import LibraryDatabase2
from calibre.utils.config import prefs from calibre.utils.config import prefs
return LibraryDatabase2(path if path else prefs['library_path']) return LibraryDatabase2(path if path else prefs['library_path'],
read_only=read_only)
def generate_test_db(library_path, # {{{ def generate_test_db(library_path, # {{{

9
src/calibre/library/database2.py
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@ -113,7 +113,8 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
def exists_at(cls, path): def exists_at(cls, path):
return path and os.path.exists(os.path.join(path, 'metadata.db')) return path and os.path.exists(os.path.join(path, 'metadata.db'))
def __init__(self, library_path, row_factory=False, default_prefs=None): def __init__(self, library_path, row_factory=False, default_prefs=None,
read_only=False):
self.field_metadata = FieldMetadata() self.field_metadata = FieldMetadata()
self.dirtied_queue = Queue() self.dirtied_queue = Queue()
if not os.path.exists(library_path): if not os.path.exists(library_path):
@ -124,6 +125,12 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
self.dbpath = os.path.join(library_path, 'metadata.db') self.dbpath = os.path.join(library_path, 'metadata.db')
self.dbpath = os.environ.get('CALIBRE_OVERRIDE_DATABASE_PATH', self.dbpath = os.environ.get('CALIBRE_OVERRIDE_DATABASE_PATH',
self.dbpath) self.dbpath)
if read_only and os.path.exists(self.dbpath):
pt = PersistentTemporaryFile('_ro.db')
pt.close()
shutil.copyfile(self.dbpath, pt.name)
self.dbpath = pt.name
if isinstance(self.dbpath, unicode) and not iswindows: if isinstance(self.dbpath, unicode) and not iswindows:
self.dbpath = self.dbpath.encode(filesystem_encoding) self.dbpath = self.dbpath.encode(filesystem_encoding)