Revert "Remove pkg_resources dependency" and test Python 3.12 (#183)

* Revert "Remove dependency on pkg_resources in favour of importlib (#181)"

This ran into the python 3.8/3.10/3.12 cross-compatibility issue.

* Add python 3.12 to azure testing

This should avoid this problem happening again (and github actions should now run properly).

.azure-pipelines/azure-pipelines.yml

@@ -88,5 +88,7 @@ stages:
           PYTHON_VERSION: 3.10
         python311:
           PYTHON_VERSION: 3.11
+        python312:
+          PYTHON_VERSION: 3.12
     steps:
     - template: ci.yml

src/workflows/services/__init__.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from importlib.metadata import entry_points
+import pkg_resources
 
 
 def lookup(service: str):
@@ -25,7 +25,10 @@ def get_known_services():
         setattr(
             get_known_services,
             "cache",
-            {e.name: e.load for e in entry_points()["workflows.services"]},
+            {
+                e.name: e.load
+                for e in pkg_resources.iter_entry_points("workflows.services")
+            },
         )
     register = get_known_services.cache.copy()
     return register

src/workflows/transport/__init__.py

@@ -2,9 +2,10 @@
 
 import argparse
 import optparse
-from importlib.metadata import entry_points
 from typing import TYPE_CHECKING, Type
 
+import pkg_resources
+
 if TYPE_CHECKING:
     from .common_transport import CommonTransport
 
@@ -60,6 +61,9 @@ def get_known_transports() -> dict[str, Type[CommonTransport]]:
         setattr(
             get_known_transports,
             "cache",
-            {e.name: e.load() for e in entry_points()["workflows.transport"]},
+            {
+                e.name: e.load()
+                for e in pkg_resources.iter_entry_points("workflows.transport")
+            },
         )
     return get_known_transports.cache.copy()  # type: ignore

tests/services/test.py

@@ -1,21 +1,8 @@
 from __future__ import annotations
 
 import workflows.services
-from workflows.services.common_service import CommonService
 
 
 def test_known_services_is_a_dictionary():
     """Check services register build in CommonService."""
     assert isinstance(workflows.services.get_known_services(), dict)
-
-
-def test_enumerate_services():
-    """Verify we can discover the installed services."""
-    services = workflows.services.get_known_services()
-    assert services.keys() == {
-        "SampleConsumer",
-        "SampleProducer",
-        "SampleTxn",
-        "SampleTxnProducer",
-    }
-    assert all([issubclass(service(), CommonService) for service in services.values()])

tests/transport/test.py

@@ -1,23 +1,11 @@
 from __future__ import annotations
 
 import workflows.transport
-from workflows.transport.common_transport import CommonTransport
 
 
 def test_known_transports_is_a_dictionary():
     """Check transport register build in CommonTransport."""
-    transports = workflows.transport.get_known_transports()
-    print(transports)
-    assert isinstance(transports, dict)
-
-
-def test_enumerate_transports():
-    """Verify we can discover the installed transports."""
-    transports = workflows.transport.get_known_transports()
-    assert transports.keys() == {"OfflineTransport", "PikaTransport", "StompTransport"}
-    assert all(
-        [issubclass(transport, CommonTransport) for transport in transports.values()]
-    )
+    assert isinstance(workflows.transport.get_known_transports(), dict)
 
 
 def test_load_any_transport():