siteconfig.py is not created correctly when installing trac as an egg

[chris.arndt@…]

When the trac package is installed as an egg (as it is necessary, for example, when you want to conveniently run multiple versions of trac simultaneously), the siteconfig.py file, which contains the default paths for templates, htdocs, etc. is not re-generated and consequently does not contain the right paths for the system, where it is installed.

As a consequence, initenv with trac-admin will fail when trying to copy standard wiki pages.

When installed as an egg, said directories are located under <site-packages>/trac-0.X.Y-py2.X.egg/share/trac.

A solution would be to generate the paths in the default siteconfig.py dynamically at run-time by using the pgk_resources module:

import os
import sys

try:
    from pkg_resources import Requirement, resource_filename
    try:
        prefix = resource_filename(Requirement.parse("trac"), "share/trac")
    except pkg_resources.DistributionNotFound:
        raise ImportError
except ImportError:
    prefix = os.path.join(sys.prefix, 'share', trac')

__default__conf_dir = os.path.join(prefix, 'conf')
...

A problem with this approach is that it would not work, if the trac egg is installed as a ZIP file. But this can be easiliy prevented, by setting zip_safe = False in the setup.py file.

[Noah Kantrowitz]

Trac 0.10 does not support installation as an egg. 0.11 does.