nixpkgs/pkgs/development/interpreters/python/catch_conflicts/catch_conflicts_py2.py
Martin Weinelt f292ef4958
python/hooks: restore catchConflictHook for python<3.10
By restoring and diverting to the old version.

Previously the newer language features and use of more modern stdlib
imports broke the hook on Python<3.10.
2023-11-18 12:57:18 +01:00

31 lines
908 B
Python

import pkg_resources
import collections
import sys
do_abort = False
packages = collections.defaultdict(list)
for f in sys.path:
for req in pkg_resources.find_distributions(f):
if req not in packages[req.project_name]:
# some exceptions inside buildPythonPackage
if req.project_name in ['setuptools', 'pip', 'wheel']:
continue
packages[req.project_name].append(req)
for name, duplicates in packages.items():
if len(duplicates) > 1:
do_abort = True
print("Found duplicated packages in closure for dependency '{}': ".format(name))
for dup in duplicates:
print(" " + repr(dup))
if do_abort:
print("")
print(
'Package duplicates found in closure, see above. Usually this '
'happens if two packages depend on different version '
'of the same dependency.')
sys.exit(1)