use importlib.metadata to load entrypoints

.github/workflows/docs.yml

@@ -7,11 +7,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v4
-    - uses: actions/setup-node@v3
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
-        node-version: 16
+        python-version: 3.12
+    - uses: actions/setup-node@v4
+      with:
+        node-version: 18
 
     - run: npm install -g @mermaid-js/mermaid-cli
 

CHANGES.md

@@ -36,6 +36,8 @@
 
 - Use `pathlib.Path` instead of `os.path`.
 
+- Use importlib.metadata to load entrypoints.
+
 ## 1.0a3 (2024-02-06)
 
 - Add `typecheck` target and use it for mypy instead of `check` target.

pyproject.toml

@@ -29,10 +29,6 @@ dependencies = [
 dynamic = ["readme"]
 
 [project.optional-dependencies]
-mypy = [
-    "types-setuptools",
-    "types-pkg-resources",
-]
 docs = ["Sphinx", "sphinxcontrib-mermaid"]
 test = ["zope.testrunner"]
 

src/mxmake/topics.py

@@ -1,7 +1,7 @@
 from collections import Counter
 from dataclasses import dataclass
+from importlib.metadata import entry_points
 from pathlib import Path
-from pkg_resources import iter_entry_points
 
 import configparser
 import functools
@@ -10,6 +10,15 @@
 import typing
 
 
+try:
+    # do we have Python 3.12+
+    from importlib.metadata import EntryPoints  # type: ignore # noqa: F401
+
+    HAS_IMPORTLIB_ENTRYPOINTS = True
+except ImportError:
+    HAS_IMPORTLIB_ENTRYPOINTS = False
+
+
 @dataclass
 class Setting:
     name: str
@@ -165,7 +174,14 @@ def domain(self, name: str) -> typing.Optional[Domain]:
 
 @functools.lru_cache(maxsize=4096)
 def load_topics() -> typing.List[Topic]:
-    return [ep.load() for ep in iter_entry_points("mxmake.topics")]
+    if HAS_IMPORTLIB_ENTRYPOINTS:
+        topics_eps = entry_points(group="mxmake.topics")  # type: ignore
+    else:
+        eps = entry_points()
+        if "mxmake.topics" not in eps:
+            return []
+        topics_eps = eps["mxmake.topics"]  # type: ignore
+    return [ep.load() for ep in topics_eps]  # type: ignore
 
 
 def get_topic(name: str) -> Topic: