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DRYer SanitizeLibraryPath

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This commit is contained in:
Kovid Goyal 2014-07-02 12:29:06 +05:30
parent 459f6706c3
commit 4718175542
1 changed files with 17 additions and 18 deletions
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35
src/calibre/gui2/__init__.py
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@ -1001,27 +1001,26 @@ class SanitizeLibraryPath(object):
'''Remove the bundled calibre libraries from LD_LIBRARY_PATH on linux. This
is needed to prevent library conflicts when launching external utilities.'''
env_vars = {'LD_LIBRARY_PATH':'/lib', 'QT_PLUGIN_PATH':'/lib/qt_plugins'}
def __enter__(self):
self.orig = os.environ.get('LD_LIBRARY_PATH', '')
self.changed = False
paths = [x for x in self.orig.split(os.pathsep) if x]
if isfrozen and islinux and paths:
npaths = [x for x in paths if x != sys.frozen_path+'/lib']
os.environ['LD_LIBRARY_PATH'] = os.pathsep.join(npaths)
self.changed = True
self.orig2 = os.environ.get('QT_PLUGIN_PATH', '')
self.changed2 = False
paths = [x for x in self.orig2.split(os.pathsep) if x]
if isfrozen and islinux and paths:
npaths = [x for x in paths if x != sys.frozen_path+'/lib/qt_plugins']
os.environ['QT_PLUGIN_PATH'] = os.pathsep.join(npaths)
self.changed2 = True
self.originals = {x:os.environ.get(x, '') for x in self.env_vars}
self.changed = {x:False for x in self.env_vars}
if isfrozen and islinux:
for var, suffix in self.env_vars.iteritems():
paths = [x for x in self.originals[var].split(os.pathsep) if x]
npaths = [x for x in paths if x != sys.frozen_path + suffix]
if len(npaths) < len(paths):
if npaths:
os.environ[var] = os.pathsep.join(npaths)
else:
del os.environ[var]
self.changed[var] = True
def __exit__(self, *args):
if self.changed:
os.environ['LD_LIBRARY_PATH'] = self.orig
if self.changed2:
os.environ['QT_PLUGIN_PATH'] = self.orig2
for var, orig in self.originals.iteritems():
if self.changed[var]:
os.environ[var] = orig
def open_url(qurl):
if isinstance(qurl, basestring):