Do not use the deprecated pkg_resources Python module

ipython2cwl/requirements_manager.py

@@ -2,6 +2,13 @@
 import subprocess
 import sys
 
+try:
+    # Python 3.8+
+    from importlib import metadata
+except ImportError:
+    # Backport for older Python versions
+    import importlib_metadata as metadata
+
 
 class RequirementsManager:
     """
@@ -20,14 +27,14 @@ def get_all(cls) -> List[str]:
                 line for line in lines if line and not line.startswith("ipython2cwl")
             ]
         except Exception:
-            # Fallback to pkg_resources if pip freeze fails
+            # Fallback to importlib.metadata if pip freeze fails
             try:
-                import pkg_resources
-
+                # Get all installed distributions using modern importlib.metadata
+                distributions = metadata.distributions()
                 return [
-                    str(package.as_requirement())
-                    for package in pkg_resources.working_set
-                    if package.project_name != "ipython2cwl"
+                    f"{dist.metadata['Name']}=={dist.version}"
+                    for dist in distributions
+                    if dist.metadata['Name'] != "ipython2cwl"
                 ]
             except Exception:
                 return []

pyproject.toml

@@ -166,6 +166,9 @@ addopts = "-ra -q --strict-markers"
 testpaths = [
     "tests",
 ]
+filterwarnings = [
+    "ignore:pythonjsonlogger.jsonlogger has been moved to pythonjsonlogger.json:DeprecationWarning",
+]
 
 # Coverage configuration
 [tool.coverage.run]

tests/test_system_tests.py

@@ -6,11 +6,33 @@
 from unittest import TestCase, skipIf
 
 import cwltool.factory
-import pkg_resources
+try:
+    # Python 3.8+
+    from importlib import metadata
+except Exception:
+    # Backport for older Python versions
+    import importlib_metadata as metadata
 import yaml
 from cwltool.context import RuntimeContext
 
 
+# Compatibility helper to load entry points without pkg_resources
+def _load_entry_point(dist, group, name):
+    eps = metadata.entry_points()
+    try:
+        # importlib.metadata API (py3.10+)
+        ep = eps.select(group=group, name=name)
+        # Convert to tuple to avoid deprecation warning about indexing
+        ep_tuple = tuple(ep)
+    except Exception:
+        # Older importlib_metadata returns a list-like of EntryPoint
+        ep_tuple = tuple(e for e in eps if getattr(e, 'group', None) == group and e.name == name)
+
+    if not ep_tuple:
+        raise RuntimeError(f"Entry point {name} not found in group {group}")
+    return ep_tuple[0].load()
+
+
 class TestConsoleScripts(TestCase):
     maxDiff = None
     here = os.path.abspath(os.path.dirname(__file__))
@@ -24,9 +46,8 @@ class TestConsoleScripts(TestCase):
     def test_repo2cwl(self):
         output_dir = tempfile.mkdtemp()
         print(f'output directory:\t{output_dir}')
-        repo2cwl = pkg_resources.load_entry_point(
-            'ipython2cwl', 'console_scripts', 'jupyter-repo2cwl'
-        )
+        # Load console script entry point using the module-level helper
+        repo2cwl = _load_entry_point('ipython2cwl', 'console_scripts', 'jupyter-repo2cwl')
         self.assertEqual(0, repo2cwl(['-o', output_dir, self.repo_like_dir]))
         self.assertListEqual(
             ['example1.cwl'],
@@ -64,8 +85,7 @@ def test_repo2cwl(self):
 
     def test_repo2cwl_output_dir_does_not_exists(self):
         random_dir_name = str(uuid.uuid4())
-        repo2cwl = pkg_resources.load_entry_point(
-            'ipython2cwl', 'console_scripts', 'jupyter-repo2cwl'
-        )
+        # Reuse the helper to load the console script
+        repo2cwl = _load_entry_point('ipython2cwl', 'console_scripts', 'jupyter-repo2cwl')
         with self.assertRaises(SystemExit):
             repo2cwl(['-o', random_dir_name, self.repo_like_dir])