def get_dist(dist_name, lookup_dirs=None):
"""Get dist for installed version of dist_name avoiding pkg_resources cache
"""
# note: based on pip/utils/__init__.py, get_installed_version(...)
# Create a requirement that we'll look for inside of setuptools.
req = pkg_resources.Requirement.parse(dist_name)
# We want to avoid having this cached, so we need to construct a new
# working set each time.
if lookup_dirs is None:
working_set = pkg_resources.WorkingSet()
else:
working_set = pkg_resources.WorkingSet(lookup_dirs)
# Get the installed distribution from our working set
return working_set.find(req)
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