setup.py `pkg_resources` is incompatible with Setuptools 82

[cho-m]

Describe the bug
pkg_resources usage in setup.py is incompatible with latest Setuptools 82.0.0 so cannot install from sdist or repository with build isolation.

omegaconf/setup.py

Line 14 in a438a5b

import pkg_resources

To Reproduce
In virtualenv, can try installing PyPI sdist or git repository:

❯ pip install --no-binary :all: omegaconf
Collecting omegaconf
  Downloading omegaconf-2.3.0.tar.gz (3.3 MB)
...
        File "<string>", line 13, in <module>
      ModuleNotFoundError: No module named 'pkg_resources'
      [end of output]

❯ pip install git+https://github.com/omry/omegaconf.git
Collecting git+https://github.com/omry/omegaconf.git
...
      ModuleNotFoundError: No module named 'pkg_resources'
      [end of output]

Expected behavior
Successful installation.

This is needed in Homebrew where we do not use wheels. Seen as a dependency of bbot:

• bbot 2.8.2 Homebrew/homebrew-core#267124

Additional context

• OmegaConf version: 2.3.0
• Python version: 3.14.3
• Operating system: macOS 26
• Please provide a minimal repro

[Zirunis]

For anyone running into this and just looking for a quick and dirty way to still install successfully:

pip install "setuptools<70"
pip install --no-build-isolation git+https://github.com/omry/omegaconf.git

This worked for me but obviously doesn't solve the problem, because this is not an isolated build.

[winniehell]

this fails in circleci as well: https://app.circleci.com/pipelines/github/omry/omegaconf/3158/workflows/d826271c-089b-4794-a02a-ca449b674e5d/jobs/12710

[winniehell]

similar issue: facebookresearch/hydra#3131

[loqs]

Quick fix without adding any new dependencies

--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,6 @@ OmegaConf setup
 """
 import pathlib
 
-import pkg_resources
 import setuptools
 
 from build_helpers.build_helpers import (
@@ -24,8 +23,9 @@ from build_helpers.build_helpers import (
 
 with pathlib.Path("requirements/base.txt").open() as requirements_txt:
     install_requires = [
-        str(requirement)
-        for requirement in pkg_resources.parse_requirements(requirements_txt)
+        line.strip()
+        for line in requirements_txt
+        if line.strip() and not line.startswith("#")
     ]
 
 

Quick fix with a dependency on packaging:

--- a/setup.py
+++ b/setup.py
@@ -9,8 +9,8 @@ OmegaConf setup
     twine upload dist/*
 """
 import pathlib
+from packaging.requirements import Requirement
 
-import pkg_resources
 import setuptools
 
 from build_helpers.build_helpers import (
@@ -24,8 +24,9 @@ from build_helpers.build_helpers import (
 
 with pathlib.Path("requirements/base.txt").open() as requirements_txt:
     install_requires = [
-        str(requirement)
-        for requirement in pkg_resources.parse_requirements(requirements_txt)
+        str(Requirement(line))
+        for line in requirements_txt
+        if line.strip() and not line.startswith("#")
     ]
 
 

Also fixed by #1211.