Fix entrypoint loading on Py37

Closes #402.

conda/meta.yaml

@@ -1,5 +1,5 @@
 {% set name = "gwf" %}
-{% set version = "2.0.0" %}
+{% set version = "2.0.1" %}
 
 package:
   name: "{{ name|lower }}"
@@ -20,13 +20,13 @@ requirements:
     - click
     - click-plugins
     - python>=3.7
-    - importlib_metadata
+    - importlib_metadata>=4.6 # [py37]
   run:
     - attrs
     - click
     - click-plugins
     - python>=3.7
-    - importlib_metadata
+    - importlib_metadata>=4.6 # [py37]
 
 test:
   imports:
@@ -38,7 +38,7 @@ test:
     - gwf --version
 
 about:
-  home: http://gwf.app/
+  home: https://gwf.app/
   license: GNU General Public v3 (GPLv3)
   license_family: GPL3
   summary: A flexible, pragmatic workflow tool.

pyproject.toml

@@ -27,7 +27,7 @@
         "attrs",
         # Used to discover plugins and backends, see:
         # https://packaging.python.org/guides/creating-and-discovering-plugins/
-        "importlib_metadata; python_version<'3.10'",
+        "importlib_metadata>4.6; python_version<'3.8'",
     ]
 
     [project.optional-dependencies]

src/gwf/utils.py

@@ -10,10 +10,10 @@
 from functools import wraps
 from pathlib import Path
 
-if sys.version_info < (3, 10):
-    from importlib_metadata import entry_points  # noqa: E401
+if sys.version_info < (3, 8):
+    from importlib_metadata import entry_points as _entry_points  # noqa: E401
 else:
-    from importlib.metadata import entry_points  # noqa: F401
+    from importlib.metadata import entry_points as _entry_points  # noqa: F401
 
 import click
 
@@ -22,6 +22,13 @@
 logger = logging.getLogger(__name__)
 
 
+def entry_points(group=None):
+    eps = _entry_points()
+    if group is None:
+        return eps
+    return eps[group]
+
+
 def is_valid_name(candidate):
     """Check whether `candidate` is a valid name for a target or workflow."""
     return re.match(r"^[a-zA-Z_][a-zA-Z0-9._]*$", candidate) is not None