Replace pkg_resources with importlib.metadata; bump minor version number

pyproject.toml

@@ -1,16 +1,19 @@
 [tool.poetry]
 name = "plaster_yaml"
-version = "0.1.2"
+version = "0.2.0"
 description = "A plaster plugin to configure pyramid app with Yaml"
 readme = "README.md"
 authors = ["Guillaume Gauvrit <guillaume@gauvr.it>"]
 include = ["CHANGELOG.md"]
 license = "BSD-derived"
 
 [tool.poetry.dependencies]
+# See: https://pypi.org/project/backports.entry-points-selectable
+importlib_metadata = { version = ">=3.6", python = "<3.10" }
 python = "^3.7"
 plaster = "^1.0"
-PyYAML = "^5.4.1"
+# Upgraded PyYAML from ^5.4 due to: https://github.com/yaml/pyyaml/issues/601
+PyYAML = "^6.0.1"
 
 [tool.poetry.dev-dependencies]
 black = "^21.4b0"

src/plaster_yaml/__init__.py

@@ -1,5 +1,15 @@
-import pkg_resources
+import sys
+
+if sys.version_info < (3, 10):
+    import importlib_metadata
+
+    class importlib:
+        pass
+
+    setattr(importlib, "metadata", importlib_metadata)
+else:
+    import importlib.metadata
 
 from .loader import Loader  # noqa
 
-__version__ = pkg_resources.get_distribution("plaster-yaml").version
+__version__ = importlib.metadata.version("plaster-yaml")

src/plaster_yaml/loader.py

@@ -3,7 +3,18 @@
 from logging.config import dictConfig
 from typing import Callable
 
-import pkg_resources
+import sys
+
+if sys.version_info < (3, 10):
+    import importlib_metadata
+
+    class importlib:
+        pass
+
+    setattr(importlib, "metadata", importlib_metadata)
+else:
+    import importlib.metadata
+
 import plaster
 import yaml
 
@@ -39,8 +50,8 @@ def resolve_use(use: str, entrypoint: str) -> Callable:
     if scheme != "egg":
         raise ValueError(f"{use}: unsupported scheme {scheme}")
 
-    distribution = pkg_resources.get_distribution(pkg)
-    runner = distribution.get_entry_info(entrypoint, name)
+    eps = importlib.metadata.entry_points(group=entrypoint, name=name)
+    (runner,) = [ep for ep in eps if ep.module.split(".")[0] == pkg]
     return runner.load()
 
 

tests/test_plaster_yaml.py

@@ -3,7 +3,6 @@
 
 import pytest
 from gunicorn.app.pasterapp import serve as gunicorn_serve_paste
-from pkg_resources import DistributionNotFound
 from waitress import serve_paste as waitress_serve_paste
 
 from plaster_yaml.loader import resolve_use