Removal of dependency on pkg_resources.

setup.cfg

@@ -11,10 +11,11 @@ classifiers =
     License :: OSI Approved :: BSD License
     Natural Language :: English
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.6
-    Programming Language :: Python :: 3.7
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
+    Programming Language :: Python :: 3.13
+    Programming Language :: Python :: 3.14
 keywords = dials
 project-urls =
     Bug-Tracker = https://github.com/Anthchirp/freephil/issues
@@ -28,7 +29,7 @@ install_requires =
 package_dir=
     =src
 packages = find:
-python_requires = >=3.6
+python_requires = >=3.10
 zip_safe = False
 
 [options.packages.find]

src/freephil/common.py

@@ -12,7 +12,30 @@
 import weakref
 from itertools import count
 
-import pkg_resources
+# Python >= 3.10: use stdlib importlib.metadata for entry point discovery.
+from importlib import metadata as _importlib_metadata  # type: ignore
+
+
+def _discover_freephil_converters():
+    """Return a list of third-party converter classes via entry points.
+
+    Since Python 3.10 is required, this uses importlib.metadata.entry_points
+    with the group argument. Broken entry points are ignored.
+    """
+    group_name = "freephil.converter"
+    try:
+        candidates = _importlib_metadata.entry_points(group=group_name)
+        loaded = []
+        for ep in candidates or []:
+            try:
+                loaded.append(ep.load())
+            except Exception:
+                # Ignore broken entry points to keep imports resilient
+                continue
+        return loaded
+    except Exception:
+        # Any unexpected issue: do not break import, just return no plugins
+        return []
 
 import freephil
 
@@ -123,7 +146,7 @@ def extended_converter_registry(additional_converters, base_registry=None):
         floats_converters,
         choice_converters,
     ]
-    + [e.load() for e in pkg_resources.iter_entry_points("freephil.converter")],
+    + _discover_freephil_converters(),
     base_registry={},
 )