Replace the remaining uses of pkg_resources with packaging and importlib_metadata.

changelog/736.feature.rst

@@ -0,0 +1 @@
+Eliminated dependency on Setuptools/pkg_resources and replaced with packaging and importlib_metadata.

mypy.ini

@@ -22,6 +22,9 @@ strict_equality = True
 ; https://github.com/tartley/colorama/issues/206
 ignore_missing_imports = True
 
+[mypy-packaging]
+ignore_missing_imports = True
+
 [mypy-pkginfo]
 ; https://bugs.launchpad.net/pkginfo/+bug/1876591
 ignore_missing_imports = True
@@ -37,10 +40,6 @@ ignore_missing_imports = True
 [mypy-rfc3986]
 ignore_missing_imports = True
 
-[mypy-setuptools]
-; https://github.com/python/typeshed/issues/2171
-ignore_missing_imports = True
-
 [mypy-tqdm]
 ; https://github.com/tqdm/tqdm/issues/260
 ignore_missing_imports = True

setup.cfg

@@ -38,7 +38,7 @@ install_requires=
     readme_renderer >= 21.0
     requests >= 2.20
     requests-toolbelt >= 0.8.0, != 0.9.0
-    setuptools >= 0.7.0
+    packaging >= 16.2
     tqdm >= 4.14
     importlib_metadata >= 3.6
     keyring >= 15.1

tests/test_package.py

@@ -264,3 +264,8 @@ def test_malformed_from_file(monkeypatch):
         package_file.PackageFile.from_filename(filename, comment=None)
 
     assert "Invalid distribution file" in err.value.args[0]
+
+
+def test_package_from_egg():
+    filename = "tests/fixtures/twine-3.3.0-py3.9.egg"
+    package_file.PackageFile.from_filename(filename, comment=None)

tests/test_repository.py

@@ -89,7 +89,14 @@ def test_make_user_agent_string(default_repo):
     assert "User-Agent" in default_repo.session.headers
 
     user_agent = default_repo.session.headers["User-Agent"]
-    packages = ("twine/", "requests/", "requests-toolbelt/", "pkginfo/", "setuptools/")
+    packages = (
+        "twine/",
+        "requests/",
+        "requests-toolbelt/",
+        "pkginfo/",
+        "importlib_metadata/",
+        "packaging/",
+    )
     assert all(p in user_agent for p in packages)
 
 

twine/cli.py

@@ -14,27 +14,24 @@
 import argparse
 from typing import Any, List, Tuple
 
-import pkginfo
-import requests
-import requests_toolbelt
-import setuptools
-import tqdm
 from importlib_metadata import entry_points
+from importlib_metadata import version
 
 import twine
-from twine import _installed
 
 args = argparse.Namespace()
 
 
 def list_dependencies_and_versions() -> List[Tuple[str, str]]:
-    return [
-        ("pkginfo", _installed.Installed(pkginfo).version),
-        ("requests", requests.__version__),
-        ("setuptools", setuptools.__version__),
-        ("requests-toolbelt", requests_toolbelt.__version__),
-        ("tqdm", tqdm.__version__),
-    ]
+    deps = (
+        "importlib_metadata",
+        "packaging",
+        "pkginfo",
+        "requests",
+        "requests-toolbelt",
+        "tqdm",
+    )
+    return [(dep, version(dep)) for dep in deps]  # type: ignore[no-untyped-call] # python/importlib_metadata#288  # noqa: E501
 
 
 def dep_versions() -> str:

twine/package.py

@@ -17,7 +17,8 @@
 import subprocess
 from typing import Dict, NamedTuple, Optional, Sequence, Tuple, Union
 
-import pkg_resources
+import importlib_metadata
+import packaging.utils
 import pkginfo
 
 from twine import exceptions
@@ -58,7 +59,7 @@ def __init__(
         self.metadata = metadata
         self.python_version = python_version
         self.filetype = filetype
-        self.safe_name = pkg_resources.safe_name(metadata.name)
+        self.safe_name = packaging.utils.canonicalize_name(metadata.name)
         self.signed_filename = self.filename + ".asc"
         self.signed_basefilename = self.basefilename + ".asc"
         self.gpg_signature: Optional[Tuple[str, bytes]] = None
@@ -99,8 +100,10 @@ def from_filename(cls, filename: str, comment: Optional[str]) -> "PackageFile":
 
         py_version: Optional[str]
         if dtype == "bdist_egg":
-            pkgd = pkg_resources.Distribution.from_filename(filename)
-            py_version = pkgd.py_version
+            (dist,) = importlib_metadata.Distribution.discover(  # type: ignore[no-untyped-call] # python/importlib_metadata#288  # noqa: E501
+                path=[filename]
+            )
+            py_version = dist.metadata["Version"]
         elif dtype == "bdist_wheel":
             py_version = meta.py_version
         elif dtype == "bdist_wininst":