Tighten linting rules

Makefile

@@ -9,7 +9,7 @@ publish := uv publish --username=__token__ --keyring-provider=subprocess
 test    := $(run) pytest
 python  := $(run) python
 ruff    := $(run) ruff
-lint    := $(ruff) check --select I
+lint    := $(ruff) check
 fmt     := $(ruff) format
 mypy    := $(run) mypy
 mkdocs  := $(run) mkdocs

pyproject.toml

@@ -89,3 +89,26 @@ explicit = true
 venvPath="."
 venv=".venv"
 exclude=[".venv"]
+
+[tool.ruff.lint]
+select = [
+    # pycodestyle
+    "E",
+    # Pyflakes
+    "F",
+    # pyupgrade
+    "UP",
+    # flake8-bugbear
+    "B",
+    # flake8-simplify
+    "SIM",
+    # isort
+    "I",
+]
+ignore = [
+    # I think try...expect...pass reads far better.
+    "SIM105",
+]
+
+[tool.ruff.lint.pycodestyle]
+max-line-length = 120

src/peplum/app/data/config.py

@@ -2,12 +2,12 @@
 
 ##############################################################################
 # Python imports.
+from collections.abc import Iterator
 from contextlib import contextmanager
 from dataclasses import asdict, dataclass, field
-from functools import lru_cache
+from functools import cache
 from json import dumps, loads
 from pathlib import Path
-from typing import Iterator
 
 ##############################################################################
 # Local imports.
@@ -76,7 +76,7 @@ def save_configuration(configuration: Configuration) -> Configuration:
 
 
 ##############################################################################
-@lru_cache(maxsize=None)
+@cache
 def load_configuration() -> Configuration:
     """Load the configuration.
 

src/peplum/app/data/peps.py

@@ -7,12 +7,13 @@
 ##############################################################################
 # Python imports.
 from collections import Counter
+from collections.abc import Iterable, Iterator
 from dataclasses import dataclass
 from functools import total_ordering
 from itertools import chain
 from operator import attrgetter
 from pathlib import Path
-from typing import Iterable, Iterator, Literal, TypeAlias
+from typing import Literal, TypeAlias
 
 ##############################################################################
 # Packaging imports.

src/peplum/app/providers/python_versions.py

@@ -45,13 +45,15 @@ def commands(self) -> CommandHits:
                     "Also isn't related to a specific Python version"
                     if self.active_peps.is_filtered
                     else "Isn't related to a specific Python version",
-                    f"{help_prefix} to PEPs unrelated to any specific Python version (narrows down to {version.count})",
+                    f"{help_prefix} to PEPs unrelated to any specific Python version "
+                    f"(narrows down to {version.count})",
                     ShowPythonVersion(""),
                 )
             else:
                 yield CommandHit(
                     f"{command_prefix} {version.version}",
-                    f"{help_prefix} to PEPs related to Python version {version.version} (narrows down to {version.count})",
+                    f"{help_prefix} to PEPs related to Python version {version.version} "
+                    f"(narrows down to {version.count})",
                     ShowPythonVersion(version.version),
                 )
 

src/peplum/app/screens/main.py

@@ -233,7 +233,7 @@ def load_pep_data(self) -> None:
                     )
                 )
             )
-        except IOError as error:
+        except OSError as error:
             self.notify(str(error), title="Error loading PEP data", severity="error")
 
     @work(thread=True)
@@ -248,7 +248,7 @@ async def download_pep_data(self) -> None:
         # Store the raw data.
         try:
             pep_data().write_text(dumps(raw_data, indent=4), encoding="utf-8")
-        except IOError as error:
+        except OSError as error:
             self.notify(str(error), title="Error saving PEP data", severity="error")
             return
         # Now kick off loading the raw data.
@@ -529,7 +529,7 @@ def _save_notes(self) -> None:
         """Save the notes."""
         try:
             self.notes.save()
-        except IOError as error:
+        except OSError as error:
             self.notify(
                 str(error), title="Unable to save notes", severity="error", timeout=8
             )

src/peplum/app/screens/pep_viewer.py

@@ -116,7 +116,7 @@ async def _download_text(self) -> None:
         if self._cache_name.exists():
             try:
                 pep_source = self._cache_name.read_text(encoding="utf-8")
-            except IOError:
+            except OSError:
                 pass
 
         if not pep_source:
@@ -125,7 +125,7 @@ async def _download_text(self) -> None:
                     pep_source := await API().get_pep(self._pep.number),
                     encoding="utf-8",
                 )
-            except IOError:
+            except OSError:
                 pass
             except API.RequestError as error:
                 pep_source = "Error downloading PEP source"
@@ -151,7 +151,7 @@ def action_refresh(self) -> None:
         """Refresh the PEP source."""
         try:
             self._cache_name.unlink(missing_ok=True)
-        except IOError:
+        except OSError:
             pass
         self._download_text()
 
@@ -178,7 +178,7 @@ async def action_save(self) -> None:
                 return
             try:
                 target.write_text(self.query_one(TextArea).text, encoding="utf-8")
-            except IOError as error:
+            except OSError as error:
                 self.notify(str(error), title="Save Failed", severity="error")
                 return
             self.notify(str(target), title="Saved")

src/peplum/app/widgets/navigation.py

@@ -6,7 +6,7 @@
 
 ##############################################################################
 # Python imports.
-from typing import Callable
+from collections.abc import Callable
 
 ##############################################################################
 # Rich imports.
@@ -100,7 +100,7 @@ def __init__(self, peps: PEPs, key: str, key_colour: str | None) -> None:
         """
         super().__init__(
             self.count_prompt(f"All [{(key_colour or 'dim')}]\\[{key}][/]", len(peps)),
-            id=f"_all_peps",
+            id="_all_peps",
         )
 
     @property
@@ -168,7 +168,7 @@ def __init__(self, version: PythonVersionCount) -> None:
         self._version = version
         """The Python version to show."""
         super().__init__(
-            self.count_prompt(version.version or f"[dim i]None[/]", version.count),
+            self.count_prompt(version.version or "[dim i]None[/]", version.count),
             id=f"_python_version_{version.version}",
         )
 

src/peplum/app/widgets/pep_details.py

@@ -6,9 +6,10 @@
 
 ##############################################################################
 # Python imports.
+from collections.abc import Sequence
 from datetime import date, datetime
 from functools import singledispatchmethod
-from typing import Final, Sequence
+from typing import Final
 from webbrowser import open as visit_url
 
 ##############################################################################

tests/unit/test_peps.py

@@ -79,7 +79,9 @@
             "topic": "",
             "created": "30-Mar-2014",
             "python_version": "3.13",
-            "post_history": "30-Mar-2014, 15-Aug-2014, 16-Aug-2014, 07-Jun-2016, 01-Sep-2016, 13-Apr-2021, 03-Nov-2021, 27-Dec-2023",
+            "post_history": (
+                "30-Mar-2014, 15-Aug-2014, 16-Aug-2014, 07-Jun-2016, 01-Sep-2016, 13-Apr-2021, 03-Nov-2021, 27-Dec-2023"
+            ),
             "resolution": None,
             "requires": None,
             "replaces": None,
@@ -99,7 +101,11 @@
             "topic": "packaging",
             "created": "15-Aug-2019",
             "python_version": None,
-            "post_history": "`15-Aug-2019 <https://discuss.python.org/t/2154>`__, `17-Dec-2021 <https://discuss.python.org/t/12622>`__, `10-May-2024 <https://discuss.python.org/t/53020>`__,",
+            "post_history": (
+                "`15-Aug-2019 <https://discuss.python.org/t/2154>`__, "
+                "`17-Dec-2021 <https://discuss.python.org/t/12622>`__, "
+                "`10-May-2024 <https://discuss.python.org/t/53020>`__,"
+            ),
             "resolution": "https://discuss.python.org/t/53020/106",
             "requires": None,
             "replaces": None,