We are using trac. In our setup we have a problem that is solved in repository. So I got the fixed file commit_update.py from the repository and I need to place it into Trac-0.12-py2.6.egg.
As egg is just a ziped filed I just unziped it, changed the file and ziped again. After restarting trac, I've got a an error message:
ExtractionError: Can't extract file(s) to egg cache
The following error occurred while trying to extract file(s) to the Python egg
cache:
[Errno 20] Not a directory
The Python egg cache directory is currently set to:
/var/trac/plugin-cache
Perhaps your account does not have write access to this directory? You can
change the cache directory by setting the PYTHON_EGG_CACHE environment
variable to point to an accessible directory.
I don't quite understand why I got this error, because I'm running trac instance under www-data and it is the owner of the plugin-cache.
Will appreciate any ideas.
Just build a new egg (with python setup.py bdist_egg), reinstall the egg and restart your trac instance.