[ENH] Remove use of pkg_resources

docs/source/conf.py

@@ -16,8 +16,8 @@
 import os
 import shlex
 
-import pkg_resources
-dist = pkg_resources.get_distribution("orange-canvas-core")
+import importlib_metadata
+dist = importlib_metadata.distribution("orange-canvas-core")
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the

orangecanvas/application/addons.py

@@ -9,7 +9,7 @@
 
 from typing import List, Any, Optional, Tuple
 
-import pkg_resources
+from packaging.requirements import Requirement
 
 from AnyQt.QtWidgets import (
     QDialog, QLineEdit, QTreeView, QHeaderView,
@@ -52,9 +52,8 @@
 
 from .. import config
 from ..config import Config
+from ..utils.pkgmeta import Distribution
 
-Requirement = pkg_resources.Requirement
-Distribution = pkg_resources.Distribution
 
 log = logging.getLogger(__name__)
 
@@ -155,7 +154,7 @@ def createRow(item):
         if isinstance(item, Installed):
             installed = True
             ins, dist = item.installable, item.local
-            name = prettify_name(dist.project_name)
+            name = prettify_name(dist.name)
             summary = get_dist_meta(dist).get("Summary", "")
             version = dist.version
             item_is_core = item.required
@@ -553,14 +552,14 @@ def network_warning(exc):
                      if ep.dist is not None]
         items = installable_items(packages, installed)
         core_constraints = {
-            r.project_name.casefold(): r
-            for r in (Requirement.parse(r) for r in config.core_packages())
+            r.name.casefold(): r
+            for r in map(Requirement, config.core_packages())
         }
 
         def constrain(item):  # type: (Item) -> Item
             """Include constraint in Installed when in core_constraint"""
             if isinstance(item, Installed):
-                name = item.local.project_name.casefold()
+                name = item.local.name.casefold()
                 if name in core_constraints:
                     return item._replace(
                         required=True, constraint=core_constraints[name]
@@ -686,7 +685,7 @@ def match(item):
             elif item.installable is not None:
                 return item.installable.name == installable.name
             else:
-                return item.local.project_name.lower() == installable.name.lower()
+                return item.local.name.lower() == installable.name.lower()
 
         new = next(filter(match, new_), None)
         assert new is not None
@@ -858,7 +857,7 @@ def __accepted(self):
         core_required = {}
         for item in self.items():
             if isinstance(item, Installed) and item.required:
-                core_required[item.local.project_name] = item.local.version
+                core_required[item.local.name] = item.local.version
 
         core_upgrade = set()
         for step in steps:
@@ -867,8 +866,8 @@ def __accepted(self):
                 if inst.name in core_required:  # direct upgrade of a core package
                     core_upgrade.add(inst.name)
                 if inst.requirements:  # indirect upgrade of a core package as a requirement
-                    for req in pkg_resources.parse_requirements(inst.requirements):
-                        if req.name in core_required and core_required[req.name] not in req:
+                    for req in map(Requirement, inst.requirements):
+                        if req.name in core_required and not req.specifier.contains(core_required[req.name], prereleases=True):
                             core_upgrade.add(req.name)  # current doesn't meet requirements
 
         if core_upgrade:

orangecanvas/application/canvasmain.py

@@ -1354,7 +1354,7 @@ def install_requirements(self, requires: Sequence[str]) -> int:
         dlg.setStyle(QApplication.style())
         dlg.setConfig(config.default)
         req = addons.Requirement
-        names = [req.parse(r).project_name for r in requires]
+        names = [req(r).name for r in requires]
         normalized_names = {normalize_name(r) for r in names}
 
         def set_state(*args):

orangecanvas/application/examples.py

@@ -3,13 +3,18 @@
 """
 import os
 import logging
+import pathlib
 import types
 
 from typing import List, Optional, IO
 
-import pkg_resources
-
 from orangecanvas import config as _config
+from orangecanvas.utils.pkgmeta import Distribution
+
+try:
+    from importlib.resources import files as _files
+except ImportError:
+    from importlib_resources import files as _files
 
 log = logging.getLogger(__name__)
 
@@ -24,8 +29,8 @@ def is_ows(filename):
         # type: (str) -> bool
         return filename.endswith(".ows")
 
-    resources = pkg_resources.resource_listdir(package.__name__, ".")
-    return sorted(filter(is_ows, resources))
+    resources = _files(package.__name__).iterdir()
+    return sorted(filter(is_ows, (r.name for r in resources)))
 
 
 def workflows(config=None):
@@ -45,11 +50,7 @@ def workflows(config=None):
         examples_entry_points = config.examples_entry_points
     for ep in examples_entry_points():
         try:
-            examples = ep.resolve()
-        except pkg_resources.DistributionNotFound as ex:
-            log.warning("Could not load examples from %r (%r)",
-                        ep.dist, ex)
-            continue
+            examples = ep.load()
         except Exception:
             log.error("Could not load examples from %r",
                       ep.dist, exc_info=True)
@@ -75,34 +76,33 @@ def workflows(config=None):
 
 class ExampleWorkflow:
     def __init__(self, resource, package=None, distribution=None):
-        # type: (str, Optional[types.ModuleType], Optional[pkg_resources.Distribution]) -> None
+        # type: (str, Optional[types.ModuleType], Optional[Distribution]) -> None
         self.resource = resource
         self.package = package
         self.distribution = distribution
 
-    def abspath(self):
-        # type: () -> str
+    def abspath(self) -> str:
         """
         Return absolute filename for the workflow if possible else
         raise an ValueError.
         """
         if self.package is not None:
-            return pkg_resources.resource_filename(self.package.__name__,
-                                                   self.resource)
+            item = _files(self.package) / self.resource
+            if isinstance(item, pathlib.Path):
+                return str(item)
         elif isinstance(self.resource, str):
             if os.path.isabs(self.resource):
                 return self.resource
 
         raise ValueError("cannot resolve resource to an absolute name")
 
-    def stream(self):
-        # type: () -> IO[bytes]
+    def stream(self) -> IO[bytes]:
         """
         Return the example file as an open stream.
         """
         if self.package is not None:
-            return pkg_resources.resource_stream(self.package.__name__,
-                                                 self.resource)
+            item = _files(self.package) / self.resource
+            return item.open('rb')
         elif isinstance(self.resource, str):
             if os.path.isabs(self.resource) and os.path.exists(self.resource):
                 return open(self.resource, "rb")

orangecanvas/application/tests/test_addons.py

@@ -9,7 +9,6 @@
 from AnyQt.QtGui import QDropEvent
 from AnyQt.QtTest import QTest
 from AnyQt.QtWidgets import QDialogButtonBox, QMessageBox, QTreeView, QStyle
-from pkg_resources import Distribution, EntryPoint
 
 from orangecanvas.application import addons
 from orangecanvas.application.addons import AddonManagerDialog
@@ -26,6 +25,7 @@
 )
 from orangecanvas.gui.test import QAppTestCase
 from orangecanvas.utils.qinvoke import qinvoke
+from orangecanvas.utils.pkgmeta import Distribution, EntryPoint
 
 
 @contextmanager
@@ -41,19 +41,46 @@ def addon_archive(pkginfo):
         os.remove(name)
 
 
+class FakeDistribution(Distribution):
+    def locate_file(self, path):
+        pass
+
+    def read_text(self, filename):
+        pass
+
+    def __init__(self, name, version):
+        super().__init__()
+        self._name = name
+        self._version = version
+
+    @property
+    def name(self):
+        return self._name
+
+    @property
+    def version(self):
+        return self._version
+
+
+class FakeEntryPoint(EntryPoint):
+    def for_(self, dist):
+        vars(self).update(dist=dist)
+        return self
+
+
 class TestAddonManagerDialog(QAppTestCase):
     def test_widget(self):
         items = [
             Installed(
                 Installable("foo", "1.1", "", "", "", []),
-                Distribution(project_name="foo", version="1.0"),
+                FakeDistribution(name="foo", version="1.0"),
             ),
             Available(
                 Installable("q", "1.2", "", "", "", [])
             ),
             Installed(
                 None,
-                Distribution(project_name="a", version="0.0")
+                FakeDistribution(name="a", version="0.0")
             ),
         ]
         w = AddonManagerDialog()
@@ -98,13 +125,14 @@ def check_state_equal(left, right):
         check_state_equal(index.data(Qt.CheckStateRole), Qt.Unchecked)
 
     @patch("orangecanvas.config.default.addon_entry_points",
-           return_value=[EntryPoint(
-               "a", "b", dist=Distribution(project_name="foo", version="1.0"))])
+           return_value=[
+               FakeEntryPoint(
+               "a", "b", "g").for_(FakeDistribution(name="foo", version="1.0"))])
     def test_drop(self, p1):
         items = [
             Installed(
                 Installable("foo", "1.1", "", "", "", []),
-                Distribution(project_name="foo", version="1.0"),
+                FakeDistribution(name="foo", version="1.0"),
             ),
         ]
         w = AddonManagerDialog()

orangecanvas/application/tests/test_addons_utils.py

@@ -3,9 +3,9 @@
 import unittest
 from tempfile import mkdtemp
 
-from pkg_resources import Requirement
 from requests import Session
 from requests_cache import CachedSession
+from packaging.requirements import Requirement
 
 from orangecanvas.application.utils.addons import (
     Available,
@@ -16,20 +16,26 @@
     is_updatable,
     prettify_name, _session,
 )
-from orangecanvas.config import Distribution
+from orangecanvas.application.tests.test_addons import FakeDistribution
 
 
 class TestUtils(unittest.TestCase):
     def test_items_1(self):
         inst = Installable("foo", "1.0", "a foo", "", "", [])
-        dist = Distribution(project_name="foo", version="1.0")
+        dist = FakeDistribution(name="foo", version="1.0")
         item = Available(inst)
         self.assertFalse(is_updatable(item))
+        self.assertEqual(item.name, "foo")
+        self.assertEqual(item.normalized_name, "foo")
 
         item = Installed(None, dist)
         self.assertFalse(is_updatable(item))
+        self.assertEqual(item.name, dist.name)
+        self.assertEqual(item.normalized_name, dist.name)
+
         item = Installed(inst, dist)
         self.assertFalse(is_updatable(item))
+        self.assertEqual(item.name, inst.name)
 
         item = Installed(inst._replace(version="0.9"), dist)
         self.assertFalse(is_updatable(item))
@@ -38,17 +44,17 @@ def test_items_1(self):
         self.assertTrue(is_updatable(item))
 
         item = Installed(inst._replace(version="2.0"), dist,
-                         constraint=Requirement.parse("foo<1.99"))
+                         constraint=Requirement("foo<1.99"))
         self.assertFalse(is_updatable(item))
         item = Installed(inst._replace(version="2.0"), dist,
-                         constraint=Requirement.parse("foo<2.99"))
+                         constraint=Requirement("foo<2.99"))
         self.assertTrue(is_updatable(item))
 
     def test_items_2(self):
         inst1 = Installable("foo", "1.0", "a foo", "", "", [])
         inst2 = Installable("bar", "1.0", "a bar", "", "", [])
-        dist2 = Distribution(project_name="bar", version="0.9")
-        dist3 = Distribution(project_name="quack", version="1.0")
+        dist2 = FakeDistribution(name="bar", version="0.9")
+        dist3 = FakeDistribution(name="quack", version="1.0")
         items = installable_items([inst1, inst2], [dist2, dist3])
         self.assertIn(Available(inst1), items)
         self.assertIn(Installed(inst2, dist2), items)

orangecanvas/application/tests/test_main.py

@@ -7,13 +7,14 @@
 
 from orangecanvas import config
 from orangecanvas.application.canvasmain import CanvasMainWindow
-from orangecanvas.config import Config, EntryPoint
+from orangecanvas.config import Config
 from orangecanvas.gui.test import QAppTestCase
 from orangecanvas.main import Main
 from orangecanvas.registry import WidgetDiscovery
 from orangecanvas.registry.tests import set_up_modules, tear_down_modules
 from orangecanvas.scheme import Scheme
 from orangecanvas.utils.shtools import temp_named_file
+from orangecanvas.utils.pkgmeta import EntryPoint
 
 
 class TestMain(unittest.TestCase):
@@ -76,13 +77,16 @@ def widget_discovery(self, *args, **kwargs):
     def widgets_entry_points(self):  # type: () -> Iterable[EntryPoint]
         pkg = "orangecanvas.registry.tests"
         return (
-            EntryPoint.parse(f"add = {pkg}.operators.add"),
-            EntryPoint.parse(f"sub = {pkg}.operators.sub")
+            EntryPoint("add", f"{pkg}.operators.add", "w"),
+            EntryPoint("sub", f"{pkg}.operators.sub", "w")
         )
 
     def workflow_constructor(self, *args, **kwargs):
         return Scheme(*args, **kwargs)
 
+    def splash_screen(self):
+        return config.Default.splash_screen()
+
 
 class TestMainGuiCase(QAppTestCase):
     def setUp(self):