Switch to uv

It seems like the type hints have gotten better :)

.git-blame-ignore-revs

@@ -0,0 +1 @@
+2cf0e060ed126537dd993896b6aa793e2a6b9e80

.github/workflows/build-and-release.yml

@@ -18,19 +18,13 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: actions/setup-python@v5
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
         with:
           python-version: ${{ matrix.python }}
 
       - name: Set up project
-        if: matrix.os != 'windows-latest'
-        run: ./scripts/setup
-
-      - name: Set up project on windows
-        if: matrix.os == 'windows-latest'
-        # For some reason, `pip install --upgrade pip` doesn't work on
-        # 'windows-latest'. The installed pip version works fine however.
-        run: ./scripts/setup --no-pip
+        run: uv sync
 
       - name: Run checks
         run: |

DEV.md

@@ -9,30 +9,25 @@ particular [this][ppug-1] and [this][ppug-2] guide).
 
 ## Setting up a dev environment
 
-The use of [venv][venv] is recommended. To initially set up a development
-environment, run these commands in the same directory as this file:
+The use of [venv][venv] and [uv][uv] is recommended. To initially set up a
+development environment, run these commands in the same directory as this file:
 
 ```
-$ python -m venv .venv
+$ uv sync
 $ . .venv/bin/activate
-$ ./scripts/setup
 ```
 
-The setup script installs a few required dependencies and tools. It also
-installs PFERD via `pip install --editable .`, which means that you can just run
-`pferd` as if it was installed normally. Since PFERD was installed with
-`--editable`, there is no need to re-run `pip install` when the source code is
-changed.
-
-If you get any errors because pip can't update itself, try running
-`./scripts/setup --no-pip` instead of `./scripts/setup`.
+This install all required dependencies and tools. It also installs PFERD as
+*editable*, which means that you can just run `pferd` as if it was installed
+normally. Since PFERD was installed with `--editable`, there is no need to
+re-run `uv sync` when the source code is changed.
 
 For more details, see [this part of the Python Tutorial][venv-tut] and
 [this section on "development mode"][ppug-dev].
 
 [venv]: <https://docs.python.org/3/library/venv.html> "venv - Creation of virtual environments"
 [venv-tut]: <https://docs.python.org/3/tutorial/venv.html> "12. Virtual Environments and Packages"
-[ppug-dev]: <https://packaging.python.org/guides/distributing-packages-using-setuptools/#working-in-development-mode> "Working in “development mode”"
+[uv]: <https://docs.astral.sh/uv/> "uv - An extremely fast Python package and project manager"
 
 ## Checking and formatting the code
 

PFERD/auth/__init__.py

@@ -1,5 +1,5 @@
+from collections.abc import Callable
 from configparser import SectionProxy
-from typing import Callable, Dict
 
 from ..config import Config
 from .authenticator import Authenticator, AuthError, AuthLoadError, AuthSection  # noqa: F401
@@ -9,21 +9,19 @@ from .pass_ import PassAuthenticator, PassAuthSection
 from .simple import SimpleAuthenticator, SimpleAuthSection
 from .tfa import TfaAuthenticator
 
-AuthConstructor = Callable[[
-    str,                # Name (without the "auth:" prefix)
-    SectionProxy,       # Authenticator's section of global config
-    Config,             # Global config
-], Authenticator]
+AuthConstructor = Callable[
+    [
+        str,  # Name (without the "auth:" prefix)
+        SectionProxy,  # Authenticator's section of global config
+        Config,  # Global config
+    ],
+    Authenticator,
+]
 
-AUTHENTICATORS: Dict[str, AuthConstructor] = {
-    "credential-file": lambda n, s, c:
-        CredentialFileAuthenticator(n, CredentialFileAuthSection(s), c),
-    "keyring": lambda n, s, c:
-        KeyringAuthenticator(n, KeyringAuthSection(s)),
-    "pass": lambda n, s, c:
-        PassAuthenticator(n, PassAuthSection(s)),
-    "simple": lambda n, s, c:
-        SimpleAuthenticator(n, SimpleAuthSection(s)),
-    "tfa": lambda n, s, c:
-        TfaAuthenticator(n),
+AUTHENTICATORS: dict[str, AuthConstructor] = {
+    "credential-file": lambda n, s, c: CredentialFileAuthenticator(n, CredentialFileAuthSection(s), c),
+    "keyring": lambda n, s, c: KeyringAuthenticator(n, KeyringAuthSection(s)),
+    "pass": lambda n, s, c: PassAuthenticator(n, PassAuthSection(s)),
+    "simple": lambda n, s, c: SimpleAuthenticator(n, SimpleAuthSection(s)),
+    "tfa": lambda n, s, c: TfaAuthenticator(n),
 }

PFERD/auth/authenticator.py

@@ -1,5 +1,4 @@
 from abc import ABC, abstractmethod
-from typing import Tuple
 
 from ..config import Section
 
@@ -35,7 +34,7 @@ class Authenticator(ABC):
         self.name = name
 
     @abstractmethod
-    async def credentials(self) -> Tuple[str, str]:
+    async def credentials(self) -> tuple[str, str]:
         pass
 
     async def username(self) -> str:

PFERD/auth/credential_file.py

@@ -1,5 +1,4 @@
 from pathlib import Path
-from typing import Tuple
 
 from ..config import Config
 from ..utils import fmt_real_path
@@ -23,7 +22,9 @@ class CredentialFileAuthenticator(Authenticator):
             with open(path, encoding="utf-8") as f:
                 lines = list(f)
         except UnicodeDecodeError:
-            raise AuthLoadError(f"Credential file at {fmt_real_path(path)} is not encoded using UTF-8")
+            raise AuthLoadError(
+                f"Credential file at {fmt_real_path(path)} is not encoded using UTF-8"
+            ) from None
         except OSError as e:
             raise AuthLoadError(f"No credential file at {fmt_real_path(path)}") from e
 
@@ -42,5 +43,5 @@ class CredentialFileAuthenticator(Authenticator):
         self._username = uline[9:]
         self._password = pline[9:]
 
-    async def credentials(self) -> Tuple[str, str]:
+    async def credentials(self) -> tuple[str, str]:
         return self._username, self._password

PFERD/auth/keyring.py

@@ -1,4 +1,4 @@
-from typing import Optional, Tuple, cast
+from typing import Optional
 
 import keyring
 
@@ -13,11 +13,10 @@ class KeyringAuthSection(AuthSection):
         return self.s.get("username")
 
     def keyring_name(self) -> str:
-        return cast(str, self.s.get("keyring_name", fallback=NAME))
+        return self.s.get("keyring_name", fallback=NAME)
 
 
 class KeyringAuthenticator(Authenticator):
-
     def __init__(self, name: str, section: KeyringAuthSection) -> None:
         super().__init__(name)
 
@@ -28,7 +27,7 @@ class KeyringAuthenticator(Authenticator):
         self._password_invalidated = False
         self._username_fixed = section.username() is not None
 
-    async def credentials(self) -> Tuple[str, str]:
+    async def credentials(self) -> tuple[str, str]:
         # Request the username
         if self._username is None:
             async with log.exclusive_output():

PFERD/auth/pass_.py

@@ -1,6 +1,5 @@
 import re
 import subprocess
-from typing import List, Tuple
 
 from ..logging import log
 from .authenticator import Authenticator, AuthError, AuthSection
@@ -12,11 +11,11 @@ class PassAuthSection(AuthSection):
             self.missing_value("passname")
         return value
 
-    def username_prefixes(self) -> List[str]:
+    def username_prefixes(self) -> list[str]:
         value = self.s.get("username_prefixes", "login,username,user")
         return [prefix.lower() for prefix in value.split(",")]
 
-    def password_prefixes(self) -> List[str]:
+    def password_prefixes(self) -> list[str]:
         value = self.s.get("password_prefixes", "password,pass,secret")
         return [prefix.lower() for prefix in value.split(",")]
 
@@ -31,14 +30,14 @@ class PassAuthenticator(Authenticator):
         self._username_prefixes = section.username_prefixes()
         self._password_prefixes = section.password_prefixes()
 
-    async def credentials(self) -> Tuple[str, str]:
+    async def credentials(self) -> tuple[str, str]:
         log.explain_topic("Obtaining credentials from pass")
 
         try:
             log.explain(f"Calling 'pass show {self._passname}'")
             result = subprocess.check_output(["pass", "show", self._passname], text=True)
         except subprocess.CalledProcessError as e:
-            raise AuthError(f"Failed to get password info from {self._passname}: {e}")
+            raise AuthError(f"Failed to get password info from {self._passname}: {e}") from e
 
         prefixed = {}
         unprefixed = []

PFERD/auth/simple.py

@@ -1,4 +1,4 @@
-from typing import Optional, Tuple
+from typing import Optional
 
 from ..logging import log
 from ..utils import agetpass, ainput
@@ -23,7 +23,7 @@ class SimpleAuthenticator(Authenticator):
         self._username_fixed = self.username is not None
         self._password_fixed = self.password is not None
 
-    async def credentials(self) -> Tuple[str, str]:
+    async def credentials(self) -> tuple[str, str]:
         if self._username is not None and self._password is not None:
             return self._username, self._password
 

PFERD/auth/tfa.py

@@ -1,5 +1,3 @@
-from typing import Tuple
-
 from ..logging import log
 from ..utils import ainput
 from .authenticator import Authenticator, AuthError
@@ -17,7 +15,7 @@ class TfaAuthenticator(Authenticator):
             code = await ainput("TFA code: ")
             return code
 
-    async def credentials(self) -> Tuple[str, str]:
+    async def credentials(self) -> tuple[str, str]:
         raise AuthError("TFA authenticator does not support usernames")
 
     def invalidate_username(self) -> None:

PFERD/cli/command_ilias_web.py

@@ -21,23 +21,20 @@ GROUP.add_argument(
     "--base-url",
     type=str,
     metavar="BASE_URL",
-    help="The base url of the ilias instance"
+    help="The base url of the ilias instance",
 )
 
 GROUP.add_argument(
     "--client-id",
     type=str,
     metavar="CLIENT_ID",
-    help="The client id of the ilias instance"
+    help="The client id of the ilias instance",
 )
 
 configure_common_group_args(GROUP)
 
 
-def load(
-        args: argparse.Namespace,
-        parser: configparser.ConfigParser,
-) -> None:
+def load(args: argparse.Namespace, parser: configparser.ConfigParser) -> None:
     log.explain(f"Creating config for command '{COMMAND_NAME}'")
 
     parser["crawl:ilias"] = {}

PFERD/cli/command_kit_ilias_web.py

@@ -21,8 +21,8 @@ configure_common_group_args(GROUP)
 
 
 def load(
-        args: argparse.Namespace,
-        parser: configparser.ConfigParser,
+    args: argparse.Namespace,
+    parser: configparser.ConfigParser,
 ) -> None:
     log.explain(f"Creating config for command '{COMMAND_NAME}'")
 

PFERD/cli/command_kit_ipd.py

@@ -18,25 +18,25 @@ GROUP.add_argument(
     "--link-regex",
     type=str,
     metavar="REGEX",
-    help="href-matching regex to identify downloadable files"
+    help="href-matching regex to identify downloadable files",
 )
 GROUP.add_argument(
     "target",
     type=str,
     metavar="TARGET",
-    help="url to crawl"
+    help="url to crawl",
 )
 GROUP.add_argument(
     "output",
     type=Path,
     metavar="OUTPUT",
-    help="output directory"
+    help="output directory",
 )
 
 
 def load(
-        args: argparse.Namespace,
-        parser: configparser.ConfigParser,
+    args: argparse.Namespace,
+    parser: configparser.ConfigParser,
 ) -> None:
     log.explain("Creating config for command 'kit-ipd'")
 

PFERD/cli/command_local.py

@@ -18,37 +18,37 @@ GROUP.add_argument(
     "target",
     type=Path,
     metavar="TARGET",
-    help="directory to crawl"
+    help="directory to crawl",
 )
 GROUP.add_argument(
     "output",
     type=Path,
     metavar="OUTPUT",
-    help="output directory"
+    help="output directory",
 )
 GROUP.add_argument(
     "--crawl-delay",
     type=float,
     metavar="SECONDS",
-    help="artificial delay to simulate for crawl requests"
+    help="artificial delay to simulate for crawl requests",
 )
 GROUP.add_argument(
     "--download-delay",
     type=float,
     metavar="SECONDS",
-    help="artificial delay to simulate for download requests"
+    help="artificial delay to simulate for download requests",
 )
 GROUP.add_argument(
     "--download-speed",
     type=int,
     metavar="BYTES_PER_SECOND",
-    help="download speed to simulate"
+    help="download speed to simulate",
 )
 
 
 def load(
-        args: argparse.Namespace,
-        parser: configparser.ConfigParser,
+    args: argparse.Namespace,
+    parser: configparser.ConfigParser,
 ) -> None:
     log.explain("Creating config for command 'local'")
 

PFERD/cli/common_ilias_args.py

@@ -12,58 +12,60 @@ def configure_common_group_args(group: argparse._ArgumentGroup) -> None:
         "target",
         type=str,
         metavar="TARGET",
-        help="course id, 'desktop', or ILIAS URL to crawl"
+        help="course id, 'desktop', or ILIAS URL to crawl",
     )
     group.add_argument(
         "output",
         type=Path,
         metavar="OUTPUT",
-        help="output directory"
+        help="output directory",
     )
     group.add_argument(
-        "--username", "-u",
+        "--username",
+        "-u",
         type=str,
         metavar="USERNAME",
-        help="user name for authentication"
+        help="user name for authentication",
     )
     group.add_argument(
         "--keyring",
         action=BooleanOptionalAction,
-        help="use the system keyring to store and retrieve passwords"
+        help="use the system keyring to store and retrieve passwords",
     )
     group.add_argument(
         "--credential-file",
         type=Path,
         metavar="PATH",
-        help="read username and password from a credential file"
+        help="read username and password from a credential file",
     )
     group.add_argument(
         "--links",
         type=show_value_error(Links.from_string),
         metavar="OPTION",
-        help="how to represent external links"
+        help="how to represent external links",
     )
     group.add_argument(
         "--link-redirect-delay",
         type=int,
         metavar="SECONDS",
-        help="time before 'fancy' links redirect to to their target (-1 to disable)"
+        help="time before 'fancy' links redirect to to their target (-1 to disable)",
     )
     group.add_argument(
         "--videos",
         action=BooleanOptionalAction,
-        help="crawl and download videos"
+        help="crawl and download videos",
     )
     group.add_argument(
         "--forums",
         action=BooleanOptionalAction,
-        help="crawl and download forum posts"
+        help="crawl and download forum posts",
     )
     group.add_argument(
-        "--http-timeout", "-t",
+        "--http-timeout",
+        "-t",
         type=float,
         metavar="SECONDS",
-        help="timeout for all HTTP requests"
+        help="timeout for all HTTP requests",
     )
 
 

PFERD/cli/parser.py

@@ -1,8 +1,9 @@
 import argparse
 import configparser
 from argparse import ArgumentTypeError
+from collections.abc import Callable, Sequence
 from pathlib import Path
-from typing import Any, Callable, List, Optional, Sequence, Union
+from typing import Any, Optional
 
 from ..output_dir import OnConflict, Redownload
 from ..version import NAME, VERSION
@@ -15,15 +16,15 @@ class ParserLoadError(Exception):
 # TODO Replace with argparse version when updating to 3.9?
 class BooleanOptionalAction(argparse.Action):
     def __init__(
-            self,
-            option_strings: List[str],
-            dest: Any,
-            default: Any = None,
-            type: Any = None,
-            choices: Any = None,
-            required: Any = False,
-            help: Any = None,
-            metavar: Any = None,
+        self,
+        option_strings: list[str],
+        dest: Any,
+        default: Any = None,
+        type: Any = None,
+        choices: Any = None,
+        required: Any = False,
+        help: Any = None,
+        metavar: Any = None,
     ):
         if len(option_strings) != 1:
             raise ValueError("There must be exactly one option string")
@@ -48,11 +49,11 @@ class BooleanOptionalAction(argparse.Action):
         )
 
     def __call__(
-            self,
-            parser: argparse.ArgumentParser,
-            namespace: argparse.Namespace,
-            values: Union[str, Sequence[Any], None],
-            option_string: Optional[str] = None,
+        self,
+        parser: argparse.ArgumentParser,
+        namespace: argparse.Namespace,
+        values: str | Sequence[Any] | None,
+        option_string: Optional[str] = None,
     ) -> None:
         if option_string and option_string in self.option_strings:
             value = not option_string.startswith("--no-")
@@ -67,11 +68,13 @@ def show_value_error(inner: Callable[[str], Any]) -> Callable[[str], Any]:
     Some validation functions (like the from_string in our enums) raise a ValueError.
     Argparse only pretty-prints ArgumentTypeErrors though, so we need to wrap our ValueErrors.
     """
+
     def wrapper(input: str) -> Any:
         try:
             return inner(input)
         except ValueError as e:
-            raise ArgumentTypeError(e)
+            raise ArgumentTypeError(e) from e
+
     return wrapper
 
 
@@ -81,52 +84,57 @@ CRAWLER_PARSER_GROUP = CRAWLER_PARSER.add_argument_group(
     description="arguments common to all crawlers",
 )
 CRAWLER_PARSER_GROUP.add_argument(
-    "--redownload", "-r",
+    "--redownload",
+    "-r",
     type=show_value_error(Redownload.from_string),
     metavar="OPTION",
-    help="when to download a file that's already present locally"
+    help="when to download a file that's already present locally",
 )
 CRAWLER_PARSER_GROUP.add_argument(
     "--on-conflict",
     type=show_value_error(OnConflict.from_string),
     metavar="OPTION",
-    help="what to do when local and remote files or directories differ"
+    help="what to do when local and remote files or directories differ",
 )
 CRAWLER_PARSER_GROUP.add_argument(
-    "--transform", "-T",
+    "--transform",
+    "-T",
     action="append",
     type=str,
     metavar="RULE",
-    help="add a single transformation rule. Can be specified multiple times"
+    help="add a single transformation rule. Can be specified multiple times",
 )
 CRAWLER_PARSER_GROUP.add_argument(
-    "--tasks", "-n",
+    "--tasks",
+    "-n",
     type=int,
     metavar="N",
-    help="maximum number of concurrent tasks (crawling, downloading)"
+    help="maximum number of concurrent tasks (crawling, downloading)",
 )
 CRAWLER_PARSER_GROUP.add_argument(
-    "--downloads", "-N",
+    "--downloads",
+    "-N",
     type=int,
     metavar="N",
-    help="maximum number of tasks that may download data at the same time"
+    help="maximum number of tasks that may download data at the same time",
 )
 CRAWLER_PARSER_GROUP.add_argument(
-    "--task-delay", "-d",
+    "--task-delay",
+    "-d",
     type=float,
     metavar="SECONDS",
-    help="time the crawler should wait between subsequent tasks"
+    help="time the crawler should wait between subsequent tasks",
 )
 CRAWLER_PARSER_GROUP.add_argument(
     "--windows-paths",
     action=BooleanOptionalAction,
-    help="whether to repair invalid paths on windows"
+    help="whether to repair invalid paths on windows",
 )
 
 
 def load_crawler(
-        args: argparse.Namespace,
-        section: configparser.SectionProxy,
+    args: argparse.Namespace,
+    section: configparser.SectionProxy,
 ) -> None:
     if args.redownload is not None:
         section["redownload"] = args.redownload.value
@@ -152,79 +160,79 @@ PARSER.add_argument(
     version=f"{NAME} {VERSION} (https://github.com/Garmelon/PFERD)",
 )
 PARSER.add_argument(
-    "--config", "-c",
+    "--config",
+    "-c",
     type=Path,
     metavar="PATH",
-    help="custom config file"
+    help="custom config file",
 )
 PARSER.add_argument(
     "--dump-config",
     action="store_true",
-    help="dump current configuration to the default config path and exit"
+    help="dump current configuration to the default config path and exit",
 )
 PARSER.add_argument(
     "--dump-config-to",
     metavar="PATH",
-    help="dump current configuration to a file and exit."
-    " Use '-' as path to print to stdout instead"
+    help="dump current configuration to a file and exit. Use '-' as path to print to stdout instead",
 )
 PARSER.add_argument(
     "--debug-transforms",
     action="store_true",
-    help="apply transform rules to files of previous run"
+    help="apply transform rules to files of previous run",
 )
 PARSER.add_argument(
-    "--crawler", "-C",
+    "--crawler",
+    "-C",
     action="append",
     type=str,
     metavar="NAME",
-    help="only execute a single crawler."
-    " Can be specified multiple times to execute multiple crawlers"
+    help="only execute a single crawler. Can be specified multiple times to execute multiple crawlers",
 )
 PARSER.add_argument(
-    "--skip", "-S",
+    "--skip",
+    "-S",
     action="append",
     type=str,
     metavar="NAME",
-    help="don't execute this particular crawler."
-    " Can be specified multiple times to skip multiple crawlers"
+    help="don't execute this particular crawler. Can be specified multiple times to skip multiple crawlers",
 )
 PARSER.add_argument(
     "--working-dir",
     type=Path,
     metavar="PATH",
-    help="custom working directory"
+    help="custom working directory",
 )
 PARSER.add_argument(
     "--explain",
     action=BooleanOptionalAction,
-    help="log and explain in detail what PFERD is doing"
+    help="log and explain in detail what PFERD is doing",
 )
 PARSER.add_argument(
     "--status",
     action=BooleanOptionalAction,
-    help="print status updates while PFERD is crawling"
+    help="print status updates while PFERD is crawling",
 )
 PARSER.add_argument(
     "--report",
     action=BooleanOptionalAction,
-    help="print a report of all local changes before exiting"
+    help="print a report of all local changes before exiting",
 )
 PARSER.add_argument(
     "--share-cookies",
     action=BooleanOptionalAction,
-    help="whether crawlers should share cookies where applicable"
+    help="whether crawlers should share cookies where applicable",
 )
 PARSER.add_argument(
     "--show-not-deleted",
     action=BooleanOptionalAction,
-    help="print messages in status and report when PFERD did not delete a local only file"
+    help="print messages in status and report when PFERD did not delete a local only file",
 )
 
 
 def load_default_section(
-        args: argparse.Namespace,
-        parser: configparser.ConfigParser,
+    args: argparse.Namespace,
+    parser: configparser.ConfigParser,
 ) -> None:
     section = parser[parser.default_section]
 

PFERD/config.py

@@ -3,7 +3,7 @@ import os
 import sys
 from configparser import ConfigParser, SectionProxy
 from pathlib import Path
-from typing import Any, List, NoReturn, Optional, Tuple
+from typing import Any, NoReturn, Optional
 
 from rich.markup import escape
 
@@ -53,10 +53,10 @@ class Section:
         raise ConfigOptionError(self.s.name, key, desc)
 
     def invalid_value(
-            self,
-            key: str,
-            value: Any,
-            reason: Optional[str],
+        self,
+        key: str,
+        value: Any,
+        reason: Optional[str],
     ) -> NoReturn:
         if reason is None:
             self.error(key, f"Invalid value {value!r}")
@@ -126,13 +126,13 @@ class Config:
             with open(path, encoding="utf-8") as f:
                 parser.read_file(f, source=str(path))
         except FileNotFoundError:
-            raise ConfigLoadError(path, "File does not exist")
+            raise ConfigLoadError(path, "File does not exist") from None
         except IsADirectoryError:
-            raise ConfigLoadError(path, "That's a directory, not a file")
+            raise ConfigLoadError(path, "That's a directory, not a file") from None
         except PermissionError:
-            raise ConfigLoadError(path, "Insufficient permissions")
+            raise ConfigLoadError(path, "Insufficient permissions") from None
         except UnicodeDecodeError:
-            raise ConfigLoadError(path, "File is not encoded using UTF-8")
+            raise ConfigLoadError(path, "File is not encoded using UTF-8") from None
 
     def dump(self, path: Optional[Path] = None) -> None:
         """
@@ -150,8 +150,8 @@ class Config:
 
         try:
             path.parent.mkdir(parents=True, exist_ok=True)
-        except PermissionError:
-            raise ConfigDumpError(path, "Could not create parent directory")
+        except PermissionError as e:
+            raise ConfigDumpError(path, "Could not create parent directory") from e
 
         try:
             # Ensuring we don't accidentally overwrite any existing files by
@@ -167,16 +167,16 @@ class Config:
                     with open(path, "w", encoding="utf-8") as f:
                         self._parser.write(f)
                 else:
-                    raise ConfigDumpError(path, "File already exists")
+                    raise ConfigDumpError(path, "File already exists") from None
         except IsADirectoryError:
-            raise ConfigDumpError(path, "That's a directory, not a file")
-        except PermissionError:
-            raise ConfigDumpError(path, "Insufficient permissions")
+            raise ConfigDumpError(path, "That's a directory, not a file") from None
+        except PermissionError as e:
+            raise ConfigDumpError(path, "Insufficient permissions") from e
 
     def dump_to_stdout(self) -> None:
         self._parser.write(sys.stdout)
 
-    def crawl_sections(self) -> List[Tuple[str, SectionProxy]]:
+    def crawl_sections(self) -> list[tuple[str, SectionProxy]]:
         result = []
         for name, proxy in self._parser.items():
             if name.startswith("crawl:"):
@@ -184,7 +184,7 @@ class Config:
 
         return result
 
-    def auth_sections(self) -> List[Tuple[str, SectionProxy]]:
+    def auth_sections(self) -> list[tuple[str, SectionProxy]]:
         result = []
         for name, proxy in self._parser.items():
             if name.startswith("auth:"):

PFERD/crawl/__init__.py

@@ -1,5 +1,5 @@
+from collections.abc import Callable
 from configparser import SectionProxy
-from typing import Callable, Dict
 
 from ..auth import Authenticator
 from ..config import Config
@@ -8,20 +8,19 @@ from .ilias import IliasWebCrawler, IliasWebCrawlerSection, KitIliasWebCrawler,
 from .kit_ipd_crawler import KitIpdCrawler, KitIpdCrawlerSection
 from .local_crawler import LocalCrawler, LocalCrawlerSection
 
-CrawlerConstructor = Callable[[
-    str,                       # Name (without the "crawl:" prefix)
-    SectionProxy,              # Crawler's section of global config
-    Config,                    # Global config
-    Dict[str, Authenticator],  # Loaded authenticators by name
-], Crawler]
+CrawlerConstructor = Callable[
+    [
+        str,  # Name (without the "crawl:" prefix)
+        SectionProxy,  # Crawler's section of global config
+        Config,  # Global config
+        dict[str, Authenticator],  # Loaded authenticators by name
+    ],
+    Crawler,
+]
 
-CRAWLERS: Dict[str, CrawlerConstructor] = {
-    "local": lambda n, s, c, a:
-        LocalCrawler(n, LocalCrawlerSection(s), c),
-    "ilias-web": lambda n, s, c, a:
-        IliasWebCrawler(n, IliasWebCrawlerSection(s), c, a),
-    "kit-ilias-web": lambda n, s, c, a:
-        KitIliasWebCrawler(n, KitIliasWebCrawlerSection(s), c, a),
-    "kit-ipd": lambda n, s, c, a:
-        KitIpdCrawler(n, KitIpdCrawlerSection(s), c),
+CRAWLERS: dict[str, CrawlerConstructor] = {
+    "local": lambda n, s, c, a: LocalCrawler(n, LocalCrawlerSection(s), c),
+    "ilias-web": lambda n, s, c, a: IliasWebCrawler(n, IliasWebCrawlerSection(s), c, a),
+    "kit-ilias-web": lambda n, s, c, a: KitIliasWebCrawler(n, KitIliasWebCrawlerSection(s), c, a),
+    "kit-ipd": lambda n, s, c, a: KitIpdCrawler(n, KitIpdCrawlerSection(s), c),
 }

PFERD/crawl/crawler.py

@@ -1,10 +1,10 @@
 import asyncio
 import os
 from abc import ABC, abstractmethod
-from collections.abc import Awaitable, Coroutine
+from collections.abc import Awaitable, Callable, Coroutine, Sequence
 from datetime import datetime
 from pathlib import Path, PurePath
-from typing import Any, Callable, Dict, List, Optional, Sequence, Set, Tuple, TypeVar
+from typing import Any, Optional, TypeVar
 
 from ..auth import Authenticator
 from ..config import Config, Section
@@ -116,7 +116,7 @@ class CrawlToken(ReusableAsyncContextManager[ProgressBar]):
         return bar
 
 
-class DownloadToken(ReusableAsyncContextManager[Tuple[ProgressBar, FileSink]]):
+class DownloadToken(ReusableAsyncContextManager[tuple[ProgressBar, FileSink]]):
     def __init__(self, limiter: Limiter, fs_token: FileSinkToken, path: PurePath):
         super().__init__()
 
@@ -128,12 +128,13 @@ class DownloadToken(ReusableAsyncContextManager[Tuple[ProgressBar, FileSink]]):
     def path(self) -> PurePath:
         return self._path
 
-    async def _on_aenter(self) -> Tuple[ProgressBar, FileSink]:
+    async def _on_aenter(self) -> tuple[ProgressBar, FileSink]:
         await self._stack.enter_async_context(self._limiter.limit_download())
         sink = await self._stack.enter_async_context(self._fs_token)
         # The "Downloaded ..." message is printed in the output dir, not here
-        bar = self._stack.enter_context(log.download_bar("[bold bright_cyan]", "Downloading",
-                                                         fmt_path(self._path)))
+        bar = self._stack.enter_context(
+            log.download_bar("[bold bright_cyan]", "Downloading", fmt_path(self._path))
+        )
 
         return bar, sink
 
@@ -204,7 +205,7 @@ class CrawlerSection(Section):
         on_windows = os.name == "nt"
         return self.s.getboolean("windows_paths", fallback=on_windows)
 
-    def auth(self, authenticators: Dict[str, Authenticator]) -> Authenticator:
+    def auth(self, authenticators: dict[str, Authenticator]) -> Authenticator:
         value = self.s.get("auth")
         if value is None:
             self.missing_value("auth")
@@ -216,10 +217,10 @@ class CrawlerSection(Section):
 
 class Crawler(ABC):
     def __init__(
-            self,
-            name: str,
-            section: CrawlerSection,
-            config: Config,
+        self,
+        name: str,
+        section: CrawlerSection,
+        config: Config,
     ) -> None:
         """
         Initialize a crawler from its name and its section in the config file.
@@ -261,7 +262,7 @@ class Crawler(ABC):
         return self._output_dir
 
     @staticmethod
-    async def gather(awaitables: Sequence[Awaitable[Any]]) -> List[Any]:
+    async def gather(awaitables: Sequence[Awaitable[Any]]) -> list[Any]:
         """
         Similar to asyncio.gather. However, in the case of an exception, all
         still running tasks are cancelled and the exception is rethrown.
@@ -293,13 +294,13 @@ class Crawler(ABC):
         return CrawlToken(self._limiter, path)
 
     def should_try_download(
-            self,
-            path: PurePath,
-            *,
-            etag_differs: Optional[bool] = None,
-            mtime: Optional[datetime] = None,
-            redownload: Optional[Redownload] = None,
-            on_conflict: Optional[OnConflict] = None,
+        self,
+        path: PurePath,
+        *,
+        etag_differs: Optional[bool] = None,
+        mtime: Optional[datetime] = None,
+        redownload: Optional[Redownload] = None,
+        on_conflict: Optional[OnConflict] = None,
     ) -> bool:
         log.explain_topic(f"Decision: Should Download {fmt_path(path)}")
 
@@ -308,11 +309,7 @@ class Crawler(ABC):
             return False
 
         should_download = self._output_dir.should_try_download(
-            path,
-            etag_differs=etag_differs,
-            mtime=mtime,
-            redownload=redownload,
-            on_conflict=on_conflict
+            path, etag_differs=etag_differs, mtime=mtime, redownload=redownload, on_conflict=on_conflict
         )
         if should_download:
             log.explain("Answer: Yes")
@@ -322,13 +319,13 @@ class Crawler(ABC):
             return False
 
     async def download(
-            self,
-            path: PurePath,
-            *,
-            etag_differs: Optional[bool] = None,
-            mtime: Optional[datetime] = None,
-            redownload: Optional[Redownload] = None,
-            on_conflict: Optional[OnConflict] = None,
+        self,
+        path: PurePath,
+        *,
+        etag_differs: Optional[bool] = None,
+        mtime: Optional[datetime] = None,
+        redownload: Optional[Redownload] = None,
+        on_conflict: Optional[OnConflict] = None,
     ) -> Optional[DownloadToken]:
         log.explain_topic(f"Decision: Download {fmt_path(path)}")
         path = self._deduplicator.mark(path)
@@ -346,7 +343,7 @@ class Crawler(ABC):
             etag_differs=etag_differs,
             mtime=mtime,
             redownload=redownload,
-            on_conflict=on_conflict
+            on_conflict=on_conflict,
         )
         if fs_token is None:
             log.explain("Answer: No")
@@ -397,7 +394,7 @@ class Crawler(ABC):
             log.warn("Couldn't find or load old report")
             return
 
-        seen: Set[PurePath] = set()
+        seen: set[PurePath] = set()
         for known in sorted(self.prev_report.found_paths):
             looking_at = list(reversed(known.parents)) + [known]
             for path in looking_at:

PFERD/crawl/http_crawler.py

@@ -3,7 +3,7 @@ import http.cookies
 import ssl
 from datetime import datetime
 from pathlib import Path, PurePath
-from typing import Any, Dict, List, Optional, Tuple, cast
+from typing import Any, Optional
 
 import aiohttp
 import certifi
@@ -29,11 +29,11 @@ class HttpCrawler(Crawler):
     COOKIE_FILE = PurePath(".cookies")
 
     def __init__(
-            self,
-            name: str,
-            section: HttpCrawlerSection,
-            config: Config,
-            shared_auth: Optional[Authenticator] = None,
+        self,
+        name: str,
+        section: HttpCrawlerSection,
+        config: Config,
+        shared_auth: Optional[Authenticator] = None,
     ) -> None:
         super().__init__(name, section, config)
 
@@ -43,7 +43,7 @@ class HttpCrawler(Crawler):
         self._http_timeout = section.http_timeout()
 
         self._cookie_jar_path = self._output_dir.resolve(self.COOKIE_FILE)
-        self._shared_cookie_jar_paths: Optional[List[Path]] = None
+        self._shared_cookie_jar_paths: Optional[list[Path]] = None
         self._shared_auth = shared_auth
 
         self._output_dir.register_reserved(self.COOKIE_FILE)
@@ -98,7 +98,7 @@ class HttpCrawler(Crawler):
         """
         raise RuntimeError("_authenticate() was called but crawler doesn't provide an implementation")
 
-    def share_cookies(self, shared: Dict[Authenticator, List[Path]]) -> None:
+    def share_cookies(self, shared: dict[Authenticator, list[Path]]) -> None:
         if not self._shared_auth:
             return
 
@@ -187,7 +187,7 @@ class HttpCrawler(Crawler):
             if level == 0 or (level == 1 and drop_h1):
                 return PurePath()
 
-            level_heading = cast(Optional[Tag], tag.find_previous(name=f"h{level}"))
+            level_heading = tag.find_previous(name=f"h{level}")
 
             if level_heading is None:
                 return find_associated_headings(tag, level - 1)
@@ -219,7 +219,7 @@ class HttpCrawler(Crawler):
         etags[str(path)] = etag
         self._output_dir.report.add_custom_value(ETAGS_CUSTOM_REPORT_VALUE_KEY, etags)
 
-    async def _request_resource_version(self, resource_url: str) -> Tuple[Optional[str], Optional[datetime]]:
+    async def _request_resource_version(self, resource_url: str) -> tuple[Optional[str], Optional[datetime]]:
         """
         Requests the ETag and Last-Modified headers of a resource via a HEAD request.
         If no entity tag / modification date can be obtained, the according value will be None.
@@ -252,23 +252,23 @@ class HttpCrawler(Crawler):
         self._load_cookies()
 
         async with aiohttp.ClientSession(
-                headers={"User-Agent": f"{NAME}/{VERSION}"},
-                cookie_jar=self._cookie_jar,
-                connector=aiohttp.TCPConnector(ssl=ssl.create_default_context(cafile=certifi.where())),
-                timeout=ClientTimeout(
-                    # 30 minutes. No download in the history of downloads was longer than 30 minutes.
-                    # This is enough to transfer a 600 MB file over a 3 Mib/s connection.
-                    # Allowing an arbitrary value could be annoying for overnight batch jobs
-                    total=15 * 60,
-                    connect=self._http_timeout,
-                    sock_connect=self._http_timeout,
-                    sock_read=self._http_timeout,
-                ),
-                # See https://github.com/aio-libs/aiohttp/issues/6626
-                # Without this aiohttp will mangle the redirect header from Shibboleth, invalidating the
-                # passed signature. Shibboleth will not accept the broken signature and authentication will
-                # fail.
-                requote_redirect_url=False
+            headers={"User-Agent": f"{NAME}/{VERSION}"},
+            cookie_jar=self._cookie_jar,
+            connector=aiohttp.TCPConnector(ssl=ssl.create_default_context(cafile=certifi.where())),
+            timeout=ClientTimeout(
+                # 30 minutes. No download in the history of downloads was longer than 30 minutes.
+                # This is enough to transfer a 600 MB file over a 3 Mib/s connection.
+                # Allowing an arbitrary value could be annoying for overnight batch jobs
+                total=15 * 60,
+                connect=self._http_timeout,
+                sock_connect=self._http_timeout,
+                sock_read=self._http_timeout,
+            ),
+            # See https://github.com/aio-libs/aiohttp/issues/6626
+            # Without this aiohttp will mangle the redirect header from Shibboleth, invalidating the
+            # passed signature. Shibboleth will not accept the broken signature and authentication will
+            # fail.
+            requote_redirect_url=False,
         ) as session:
             self.session = session
             try:

PFERD/crawl/ilias/__init__.py

@@ -1,5 +1,9 @@
-from .kit_ilias_web_crawler import (IliasWebCrawler, IliasWebCrawlerSection, KitIliasWebCrawler,
-                                    KitIliasWebCrawlerSection)
+from .kit_ilias_web_crawler import (
+    IliasWebCrawler,
+    IliasWebCrawlerSection,
+    KitIliasWebCrawler,
+    KitIliasWebCrawlerSection,
+)
 
 __all__ = [
     "IliasWebCrawler",

PFERD/crawl/ilias/async_helper.py

@@ -1,5 +1,6 @@
 import asyncio
-from typing import Any, Callable, Optional
+from collections.abc import Callable
+from typing import Any, Optional
 
 import aiohttp
 
@@ -15,9 +16,9 @@ def _iorepeat(attempts: int, name: str, failure_is_error: bool = False) -> Calla
                 try:
                     return await f(*args, **kwargs)
                 except aiohttp.ContentTypeError:  # invalid content type
-                    raise CrawlWarning("ILIAS returned an invalid content type")
+                    raise CrawlWarning("ILIAS returned an invalid content type") from None
                 except aiohttp.TooManyRedirects:
-                    raise CrawlWarning("Got stuck in a redirect loop")
+                    raise CrawlWarning("Got stuck in a redirect loop") from None
                 except aiohttp.ClientPayloadError as e:  # encoding or not enough bytes
                     last_exception = e
                 except aiohttp.ClientConnectionError as e:  # e.g. timeout, disconnect, resolve failed, etc.

PFERD/crawl/ilias/file_templates.py

@@ -254,21 +254,22 @@ def learning_module_template(body: bs4.Tag, name: str, prev: Optional[str], next
         )
 
     if bot_nav := body.select_one(".ilc_page_bnav_BottomNavigation"):
-        bot_nav.replace_with(soupify(nav_template.replace(
-            "{{left}}", left).replace("{{right}}", right).encode())
+        bot_nav.replace_with(
+            soupify(nav_template.replace("{{left}}", left).replace("{{right}}", right).encode())
         )
 
-    body_str = cast(str, body.prettify())
+    body_str = body.prettify()
     return _learning_module_template.replace("{{body}}", body_str).replace("{{name}}", name)
 
 
 def forum_thread_template(name: str, url: str, heading: bs4.Tag, content: bs4.Tag) -> str:
-    if title := cast(Optional[bs4.Tag], heading.find(name="b")):
+    if title := heading.find(name="b"):
         title.wrap(bs4.Tag(name="a", attrs={"href": url}))
-    return _forum_thread_template \
-        .replace("{{name}}", name) \
-        .replace("{{heading}}", cast(str, heading.prettify())) \
-        .replace("{{content}}", cast(str, content.prettify()))
+    return (
+        _forum_thread_template.replace("{{name}}", name)
+        .replace("{{heading}}", heading.prettify())
+        .replace("{{content}}", content.prettify())
+    )
 
 
 @dataclasses.dataclass
@@ -296,9 +297,7 @@ class Links(Enum):
         raise ValueError("Missing switch case")
 
     def collection_as_one(self) -> bool:
-        if self == Links.FANCY:
-            return True
-        return False
+        return self == Links.FANCY
 
     def extension(self) -> Optional[str]:
         if self == Links.FANCY:
@@ -330,8 +329,7 @@ class Links(Enum):
         # All others get coerced to fancy
         content = cast(str, Links.FANCY.template())
         repeated_content = cast(
-            re.Match[str],
-            re.search(r"<!-- REPEAT START -->([\s\S]+)<!-- REPEAT END -->", content)
+            re.Match[str], re.search(r"<!-- REPEAT START -->([\s\S]+)<!-- REPEAT END -->", content)
         ).group(1)
 
         parts = []
@@ -355,4 +353,4 @@ class Links(Enum):
             return Links(string)
         except ValueError:
             options = [f"'{option.value}'" for option in Links]
-            raise ValueError(f"must be one of {', '.join(options)}")
+            raise ValueError(f"must be one of {', '.join(options)}") from None

PFERD/crawl/ilias/ilias_web_crawler.py

@@ -4,7 +4,7 @@ import os
 import re
 from collections.abc import Awaitable, Coroutine
 from pathlib import PurePath
-from typing import Any, Dict, List, Literal, Optional, Set, Union, cast
+from typing import Any, Literal, Optional, cast
 from urllib.parse import urljoin
 
 import aiohttp
@@ -21,11 +21,19 @@ from ..http_crawler import HttpCrawler, HttpCrawlerSection
 from .async_helper import _iorepeat
 from .file_templates import LinkData, Links, forum_thread_template, learning_module_template
 from .ilias_html_cleaner import clean, insert_base_markup
-from .kit_ilias_html import (IliasElementType, IliasForumThread, IliasLearningModulePage, IliasPage,
-                             IliasPageElement, IliasSoup, _sanitize_path_name, parse_ilias_forum_export)
+from .kit_ilias_html import (
+    IliasElementType,
+    IliasForumThread,
+    IliasLearningModulePage,
+    IliasPage,
+    IliasPageElement,
+    IliasSoup,
+    _sanitize_path_name,
+    parse_ilias_forum_export,
+)
 from .shibboleth_login import ShibbolethLogin
 
-TargetType = Union[str, int]
+TargetType = str | int
 
 
 class LoginTypeLocal:
@@ -41,7 +49,7 @@ class IliasWebCrawlerSection(HttpCrawlerSection):
 
         return base_url
 
-    def login(self) -> Union[Literal["shibboleth"], LoginTypeLocal]:
+    def login(self) -> Literal["shibboleth"] | LoginTypeLocal:
         login_type = self.s.get("login_type")
         if not login_type:
             self.missing_value("login_type")
@@ -55,9 +63,7 @@ class IliasWebCrawlerSection(HttpCrawlerSection):
 
         self.invalid_value("login_type", login_type, "Should be <shibboleth | local>")
 
-    def tfa_auth(
-        self, authenticators: Dict[str, Authenticator]
-    ) -> Optional[Authenticator]:
+    def tfa_auth(self, authenticators: dict[str, Authenticator]) -> Optional[Authenticator]:
         value: Optional[str] = self.s.get("tfa_auth")
         if value is None:
             return None
@@ -104,7 +110,7 @@ class IliasWebCrawlerSection(HttpCrawlerSection):
         return self.s.getboolean("forums", fallback=False)
 
 
-_DIRECTORY_PAGES: Set[IliasElementType] = {
+_DIRECTORY_PAGES: set[IliasElementType] = {
     IliasElementType.EXERCISE,
     IliasElementType.EXERCISE_FILES,
     IliasElementType.EXERCISE_OVERVIEW,
@@ -116,7 +122,7 @@ _DIRECTORY_PAGES: Set[IliasElementType] = {
     IliasElementType.OPENCAST_VIDEO_FOLDER_MAYBE_PAGINATED,
 }
 
-_VIDEO_ELEMENTS: Set[IliasElementType] = {
+_VIDEO_ELEMENTS: set[IliasElementType] = {
     IliasElementType.MEDIACAST_VIDEO,
     IliasElementType.MEDIACAST_VIDEO_FOLDER,
     IliasElementType.OPENCAST_VIDEO,
@@ -166,17 +172,19 @@ class IliasWebCrawler(HttpCrawler):
         name: str,
         section: IliasWebCrawlerSection,
         config: Config,
-        authenticators: Dict[str, Authenticator]
+        authenticators: dict[str, Authenticator],
     ):
         # Setting a main authenticator for cookie sharing
         auth = section.auth(authenticators)
         super().__init__(name, section, config, shared_auth=auth)
 
         if section.tasks() > 1:
-            log.warn("""
+            log.warn(
+                """
 Please avoid using too many parallel requests as these are the KIT ILIAS
 instance's greatest bottleneck.
-            """.strip())
+            """.strip()
+            )
 
         self._auth = auth
         self._base_url = section.base_url()
@@ -193,7 +201,7 @@ instance's greatest bottleneck.
         self._links = section.links()
         self._videos = section.videos()
         self._forums = section.forums()
-        self._visited_urls: Dict[str, PurePath] = dict()
+        self._visited_urls: dict[str, PurePath] = dict()
 
     async def _run(self) -> None:
         if isinstance(self._target, int):
@@ -210,22 +218,19 @@ instance's greatest bottleneck.
         # Start crawling at the given course
         root_url = url_set_query_param(
             urljoin(self._base_url + "/", "goto.php"),
-            "target", f"crs_{course_id}",
+            "target",
+            f"crs_{course_id}",
         )
 
         await self._crawl_url(root_url, expected_id=course_id)
 
     async def _crawl_desktop(self) -> None:
         await self._crawl_url(
-            urljoin(self._base_url, "/ilias.php?baseClass=ilDashboardGUI&cmd=show"),
-            crawl_nested_courses=True
+            urljoin(self._base_url, "/ilias.php?baseClass=ilDashboardGUI&cmd=show"), crawl_nested_courses=True
         )
 
     async def _crawl_url(
-        self,
-        url: str,
-        expected_id: Optional[int] = None,
-        crawl_nested_courses: bool = False
+        self, url: str, expected_id: Optional[int] = None, crawl_nested_courses: bool = False
     ) -> None:
         if awaitable := await self._handle_ilias_page(
             url, None, PurePath("."), expected_id, crawl_nested_courses
@@ -238,7 +243,7 @@ instance's greatest bottleneck.
         current_element: Optional[IliasPageElement],
         path: PurePath,
         expected_course_id: Optional[int] = None,
-        crawl_nested_courses: bool = False
+        crawl_nested_courses: bool = False,
     ) -> Optional[Coroutine[Any, Any, None]]:
         maybe_cl = await self.crawl(path)
         if not maybe_cl:
@@ -259,9 +264,9 @@ instance's greatest bottleneck.
         expected_course_id: Optional[int] = None,
         crawl_nested_courses: bool = False,
     ) -> None:
-        elements: List[IliasPageElement] = []
+        elements: list[IliasPageElement] = []
         # A list as variable redefinitions are not propagated to outer scopes
-        description: List[BeautifulSoup] = []
+        description: list[BeautifulSoup] = []
 
         @_iorepeat(3, "crawling folder")
         async def gather_elements() -> None:
@@ -304,7 +309,7 @@ instance's greatest bottleneck.
 
         elements.sort(key=lambda e: e.id())
 
-        tasks: List[Awaitable[None]] = []
+        tasks: list[Awaitable[None]] = []
         for element in elements:
             if handle := await self._handle_ilias_element(cl.path, element, crawl_nested_courses):
                 tasks.append(asyncio.create_task(handle))
@@ -319,10 +324,7 @@ instance's greatest bottleneck.
     # works correctly.
     @anoncritical
     async def _handle_ilias_element(
-        self,
-        parent_path: PurePath,
-        element: IliasPageElement,
-        crawl_nested_courses: bool = False
+        self, parent_path: PurePath, element: IliasPageElement, crawl_nested_courses: bool = False
     ) -> Optional[Coroutine[Any, Any, None]]:
         # element.name might contain `/` if the crawler created nested elements,
         # so we can not sanitize it here. We trust in the output dir to thwart worst-case
@@ -338,15 +340,14 @@ instance's greatest bottleneck.
             )
             return None
 
-        if element.type in _VIDEO_ELEMENTS:
-            if not self._videos:
-                log.status(
-                    "[bold bright_black]",
-                    "Ignored",
-                    fmt_path(element_path),
-                    "[bright_black](enable with option 'videos')"
-                )
-                return None
+        if element.type in _VIDEO_ELEMENTS and not self._videos:
+            log.status(
+                "[bold bright_black]",
+                "Ignored",
+                fmt_path(element_path),
+                "[bright_black](enable with option 'videos')",
+            )
+            return None
 
         if element.type == IliasElementType.FILE:
             return await self._handle_file(element, element_path)
@@ -356,7 +357,7 @@ instance's greatest bottleneck.
                     "[bold bright_black]",
                     "Ignored",
                     fmt_path(element_path),
-                    "[bright_black](enable with option 'forums')"
+                    "[bright_black](enable with option 'forums')",
                 )
                 return None
             return await self._handle_forum(element, element_path)
@@ -365,7 +366,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](tests contain no relevant data)"
+                "[bright_black](tests contain no relevant data)",
             )
             return None
         elif element.type == IliasElementType.SURVEY:
@@ -373,7 +374,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](surveys contain no relevant data)"
+                "[bright_black](surveys contain no relevant data)",
             )
             return None
         elif element.type == IliasElementType.SCORM_LEARNING_MODULE:
@@ -381,7 +382,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](scorm learning modules are not supported)"
+                "[bright_black](scorm learning modules are not supported)",
             )
             return None
         elif element.type == IliasElementType.LITERATURE_LIST:
@@ -389,7 +390,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](literature lists are not currently supported)"
+                "[bright_black](literature lists are not currently supported)",
             )
             return None
         elif element.type == IliasElementType.LEARNING_MODULE_HTML:
@@ -397,7 +398,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](HTML learning modules are not supported)"
+                "[bright_black](HTML learning modules are not supported)",
             )
             return None
         elif element.type == IliasElementType.BLOG:
@@ -405,7 +406,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](blogs are not currently supported)"
+                "[bright_black](blogs are not currently supported)",
             )
             return None
         elif element.type == IliasElementType.DCL_RECORD_LIST:
@@ -413,7 +414,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](dcl record lists are not currently supported)"
+                "[bright_black](dcl record lists are not currently supported)",
             )
             return None
         elif element.type == IliasElementType.MEDIA_POOL:
@@ -421,7 +422,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](media pools are not currently supported)"
+                "[bright_black](media pools are not currently supported)",
             )
             return None
         elif element.type == IliasElementType.COURSE:
@@ -431,7 +432,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](not descending into linked course)"
+                "[bright_black](not descending into linked course)",
             )
             return None
         elif element.type == IliasElementType.WIKI:
@@ -439,7 +440,7 @@ instance's greatest bottleneck.
                 "[bold bright_black]",
                 "Ignored",
                 fmt_path(element_path),
-                "[bright_black](wikis are not currently supported)"
+                "[bright_black](wikis are not currently supported)",
             )
             return None
         elif element.type == IliasElementType.LEARNING_MODULE:
@@ -513,19 +514,15 @@ instance's greatest bottleneck.
     @anoncritical
     @_iorepeat(3, "resolving link")
     async def _download_link(
-        self,
-        link_renderer: Links,
-        collection_name: str,
-        links: list[LinkData],
-        dl: DownloadToken
+        self, link_renderer: Links, collection_name: str, links: list[LinkData], dl: DownloadToken
     ) -> None:
         async with dl as (bar, sink):
             rendered = link_renderer.interpolate(self._link_file_redirect_delay, collection_name, links)
             sink.file.write(rendered.encode("utf-8"))
             sink.done()
 
-    async def _resolve_link_target(self, export_url: str) -> Union[BeautifulSoup, Literal['none']]:
-        async def impl() -> Optional[Union[BeautifulSoup, Literal['none']]]:
+    async def _resolve_link_target(self, export_url: str) -> BeautifulSoup | Literal["none"]:
+        async def impl() -> Optional[BeautifulSoup | Literal["none"]]:
             async with self.session.get(export_url, allow_redirects=False) as resp:
                 # No redirect means we were authenticated
                 if hdrs.LOCATION not in resp.headers:
@@ -551,7 +548,7 @@ instance's greatest bottleneck.
 
     @staticmethod
     def _parse_link_content(element: IliasPageElement, content: BeautifulSoup) -> list[LinkData]:
-        links = cast(list[Tag], list(content.select("a")))
+        links = list(content.select("a"))
         if len(links) == 1:
             url = str(links[0].get("href")).strip()
             return [LinkData(name=element.name, description=element.description or "", url=url)]
@@ -601,7 +598,7 @@ instance's greatest bottleneck.
         async with dl as (_bar, sink):
             description = clean(insert_base_markup(description))
             description_tag = await self.internalize_images(description)
-            sink.file.write(cast(str, description_tag.prettify()).encode("utf-8"))
+            sink.file.write(description_tag.prettify().encode("utf-8"))
             sink.done()
 
     @anoncritical
@@ -626,7 +623,7 @@ instance's greatest bottleneck.
         if self.prev_report:
             self.report.add_custom_value(
                 _get_video_cache_key(element),
-                self.prev_report.get_custom_value(_get_video_cache_key(element))
+                self.prev_report.get_custom_value(_get_video_cache_key(element)),
             )
 
         # A video might contain other videos, so let's "crawl" the video first
@@ -660,7 +657,7 @@ instance's greatest bottleneck.
 
     def _previous_contained_opencast_videos(
         self, element: IliasPageElement, element_path: PurePath
-    ) -> List[PurePath]:
+    ) -> list[PurePath]:
         if not self.prev_report:
             return []
         custom_value = self.prev_report.get_custom_value(_get_video_cache_key(element))
@@ -698,7 +695,7 @@ instance's greatest bottleneck.
         def add_to_report(paths: list[str]) -> None:
             self.report.add_custom_value(
                 _get_video_cache_key(element),
-                {"known_paths": paths, "own_path": str(self._transformer.transform(dl.path))}
+                {"known_paths": paths, "own_path": str(self._transformer.transform(dl.path))},
             )
 
         async with dl as (bar, sink):
@@ -716,7 +713,7 @@ instance's greatest bottleneck.
                 add_to_report([str(self._transformer.transform(dl.path))])
                 return
 
-        contained_video_paths: List[str] = []
+        contained_video_paths: list[str] = []
 
         for stream_element in stream_elements:
             video_path = dl.path.parent / stream_element.name
@@ -752,11 +749,7 @@ instance's greatest bottleneck.
             await self._stream_from_url(element, sink, bar, is_video)
 
     async def _stream_from_url(
-        self,
-        element: IliasPageElement,
-        sink: FileSink,
-        bar: ProgressBar,
-        is_video: bool
+        self, element: IliasPageElement, sink: FileSink, bar: ProgressBar, is_video: bool
     ) -> None:
         url = element.url
 
@@ -831,14 +824,14 @@ instance's greatest bottleneck.
                 log.warn("Could not extract forum export url")
                 return
 
-            export = await self._post(export_url, {
-                "format": "html",
-                "cmd[createExportFile]": ""
-            })
+            export = await self._post(
+                export_url,
+                {"format": "html", "cmd[createExportFile]": ""},
+            )
 
             elements = parse_ilias_forum_export(soupify(export))
 
-        tasks: List[Awaitable[None]] = []
+        tasks: list[Awaitable[None]] = []
         for thread in elements:
             tasks.append(asyncio.create_task(self._download_forum_thread(cl.path, thread, element.url)))
 
@@ -848,10 +841,7 @@ instance's greatest bottleneck.
     @anoncritical
     @_iorepeat(3, "saving forum thread")
     async def _download_forum_thread(
-        self,
-        parent_path: PurePath,
-        thread: Union[IliasForumThread, IliasPageElement],
-        forum_url: str
+        self, parent_path: PurePath, thread: IliasForumThread | IliasPageElement, forum_url: str
     ) -> None:
         path = parent_path / (_sanitize_path_name(thread.name) + ".html")
         maybe_dl = await self.download(path, mtime=thread.mtime)
@@ -860,10 +850,7 @@ instance's greatest bottleneck.
 
         async with maybe_dl as (bar, sink):
             rendered = forum_thread_template(
-                thread.name,
-                forum_url,
-                thread.name_tag,
-                await self.internalize_images(thread.content_tag)
+                thread.name, forum_url, thread.name_tag, await self.internalize_images(thread.content_tag)
             )
             sink.file.write(rendered.encode("utf-8"))
             sink.done()
@@ -883,7 +870,7 @@ instance's greatest bottleneck.
     @_iorepeat(3, "crawling learning module")
     @anoncritical
     async def _crawl_learning_module(self, element: IliasPageElement, cl: CrawlToken) -> None:
-        elements: List[IliasLearningModulePage] = []
+        elements: list[IliasLearningModulePage] = []
 
         async with cl:
             log.explain_topic(f"Parsing initial HTML page for {fmt_path(cl.path)}")
@@ -891,25 +878,25 @@ instance's greatest bottleneck.
             soup = await self._get_page(element.url)
             page = IliasPage(soup, element)
             if next := page.get_learning_module_data():
-                elements.extend(await self._crawl_learning_module_direction(
-                    cl.path, next.previous_url, "left", element
-                ))
+                elements.extend(
+                    await self._crawl_learning_module_direction(cl.path, next.previous_url, "left", element)
+                )
                 elements.append(next)
-                elements.extend(await self._crawl_learning_module_direction(
-                    cl.path, next.next_url, "right", element
-                ))
+                elements.extend(
+                    await self._crawl_learning_module_direction(cl.path, next.next_url, "right", element)
+                )
 
         # Reflect their natural ordering in the file names
         for index, lm_element in enumerate(elements):
             lm_element.title = f"{index:02}_{lm_element.title}"
 
-        tasks: List[Awaitable[None]] = []
+        tasks: list[Awaitable[None]] = []
         for index, elem in enumerate(elements):
             prev_url = elements[index - 1].title if index > 0 else None
             next_url = elements[index + 1].title if index < len(elements) - 1 else None
-            tasks.append(asyncio.create_task(
-                self._download_learning_module_page(cl.path, elem, prev_url, next_url)
-            ))
+            tasks.append(
+                asyncio.create_task(self._download_learning_module_page(cl.path, elem, prev_url, next_url))
+            )
 
         # And execute them
         await self.gather(tasks)
@@ -918,10 +905,10 @@ instance's greatest bottleneck.
         self,
         path: PurePath,
         start_url: Optional[str],
-        dir: Union[Literal["left"], Literal["right"]],
-        parent_element: IliasPageElement
-    ) -> List[IliasLearningModulePage]:
-        elements: List[IliasLearningModulePage] = []
+        dir: Literal["left"] | Literal["right"],
+        parent_element: IliasPageElement,
+    ) -> list[IliasLearningModulePage]:
+        elements: list[IliasLearningModulePage] = []
 
         if not start_url:
             return elements
@@ -935,10 +922,7 @@ instance's greatest bottleneck.
             page = IliasPage(soup, parent_element)
             if next := page.get_learning_module_data():
                 elements.append(next)
-                if dir == "left":
-                    next_element_url = next.previous_url
-                else:
-                    next_element_url = next.next_url
+                next_element_url = next.previous_url if dir == "left" else next.next_url
             counter += 1
 
         return elements
@@ -950,7 +934,7 @@ instance's greatest bottleneck.
         parent_path: PurePath,
         element: IliasLearningModulePage,
         prev: Optional[str],
-        next: Optional[str]
+        next: Optional[str],
     ) -> None:
         path = parent_path / (_sanitize_path_name(element.title) + ".html")
         maybe_dl = await self.download(path)
@@ -962,16 +946,10 @@ instance's greatest bottleneck.
 
         if prev:
             prev_p = self._transformer.transform(parent_path / (_sanitize_path_name(prev) + ".html"))
-            if prev_p:
-                prev = cast(str, os.path.relpath(prev_p, my_path.parent))
-            else:
-                prev = None
+            prev = os.path.relpath(prev_p, my_path.parent) if prev_p else None
         if next:
             next_p = self._transformer.transform(parent_path / (_sanitize_path_name(next) + ".html"))
-            if next_p:
-                next = cast(str, os.path.relpath(next_p, my_path.parent))
-            else:
-                next = None
+            next = os.path.relpath(next_p, my_path.parent) if next_p else None
 
         async with maybe_dl as (bar, sink):
             content = element.content
@@ -985,16 +963,13 @@ instance's greatest bottleneck.
         """
         log.explain_topic("Internalizing images")
         for elem in tag.find_all(recursive=True):
-            if not isinstance(elem, Tag):
-                continue
-            if elem.name == "img":
-                if src := elem.attrs.get("src", None):
-                    url = urljoin(self._base_url, cast(str, src))
-                    if not url.startswith(self._base_url):
-                        continue
-                    log.explain(f"Internalizing {url!r}")
-                    img = await self._get_authenticated(url)
-                    elem.attrs["src"] = "data:;base64," + base64.b64encode(img).decode()
+            if elem.name == "img" and (src := elem.attrs.get("src", None)):
+                url = urljoin(self._base_url, cast(str, src))
+                if not url.startswith(self._base_url):
+                    continue
+                log.explain(f"Internalizing {url!r}")
+                img = await self._get_authenticated(url)
+                elem.attrs["src"] = "data:;base64," + base64.b64encode(img).decode()
             if elem.name == "iframe" and cast(str, elem.attrs.get("src", "")).startswith("//"):
                 # For unknown reasons the protocol seems to be stripped.
                 elem.attrs["src"] = "https:" + cast(str, elem.attrs["src"])
@@ -1039,11 +1014,7 @@ instance's greatest bottleneck.
             )
         return soup
 
-    async def _post(
-        self,
-        url: str,
-        data: dict[str, Union[str, List[str]]]
-    ) -> bytes:
+    async def _post(self, url: str, data: dict[str, str | list[str]]) -> bytes:
         form_data = aiohttp.FormData()
         for key, val in data.items():
             form_data.add_field(key, val)
@@ -1081,7 +1052,7 @@ instance's greatest bottleneck.
             async with self.session.get(urljoin(self._base_url, "/login.php"), params=params) as request:
                 login_page = soupify(await request.read())
 
-            login_form = cast(Optional[Tag], login_page.find("form", attrs={"name": "login_form"}))
+            login_form = login_page.find("form", attrs={"name": "login_form"})
             if login_form is None:
                 raise CrawlError("Could not find the login form! Specified client id might be invalid.")
 
@@ -1092,8 +1063,8 @@ instance's greatest bottleneck.
             username, password = await self._auth.credentials()
 
             login_form_data = aiohttp.FormData()
-            login_form_data.add_field('login_form/input_3/input_4', username)
-            login_form_data.add_field('login_form/input_3/input_5', password)
+            login_form_data.add_field("login_form/input_3/input_4", username)
+            login_form_data.add_field("login_form/input_3/input_5", password)
 
             # do the actual login
             async with self.session.post(urljoin(self._base_url, login_url), data=login_form_data) as request:

PFERD/crawl/ilias/kit_ilias_html.py

@@ -1,9 +1,10 @@
 import json
 import re
+from collections.abc import Callable
 from dataclasses import dataclass
 from datetime import date, datetime, timedelta
 from enum import Enum
-from typing import Callable, Dict, Optional, Union, cast
+from typing import Optional, cast
 from urllib.parse import urljoin, urlparse
 
 from bs4 import BeautifulSoup, Tag
@@ -13,7 +14,7 @@ from PFERD.crawl.crawler import CrawlWarning
 from PFERD.logging import log
 from PFERD.utils import url_set_query_params
 
-TargetType = Union[str, int]
+TargetType = str | int
 
 
 class TypeMatcher:
@@ -42,15 +43,15 @@ class TypeMatcher:
             self.alt = alt
 
     class All:
-        matchers: list['IliasElementMatcher']
+        matchers: list["IliasElementMatcher"]
 
-        def __init__(self, matchers: list['IliasElementMatcher']):
+        def __init__(self, matchers: list["IliasElementMatcher"]):
             self.matchers = matchers
 
     class Any:
-        matchers: list['IliasElementMatcher']
+        matchers: list["IliasElementMatcher"]
 
-        def __init__(self, matchers: list['IliasElementMatcher']):
+        def __init__(self, matchers: list["IliasElementMatcher"]):
             self.matchers = matchers
 
     @staticmethod
@@ -70,11 +71,11 @@ class TypeMatcher:
         return TypeMatcher.ImgAlt(alt)
 
     @staticmethod
-    def all(*matchers: 'IliasElementMatcher') -> All:
+    def all(*matchers: "IliasElementMatcher") -> All:
         return TypeMatcher.All(list(matchers))
 
     @staticmethod
-    def any(*matchers: 'IliasElementMatcher') -> Any:
+    def any(*matchers: "IliasElementMatcher") -> Any:
         return TypeMatcher.Any(list(matchers))
 
     @staticmethod
@@ -127,20 +128,14 @@ class IliasElementType(Enum):
     def matcher(self) -> IliasElementMatcher:
         match self:
             case IliasElementType.BLOG:
-                return TypeMatcher.any(
-                    TypeMatcher.img_src("_blog.svg")
-                )
+                return TypeMatcher.any(TypeMatcher.img_src("_blog.svg"))
             case IliasElementType.BOOKING:
-                return TypeMatcher.any(
-                    TypeMatcher.path("/book/"),
-                    TypeMatcher.img_src("_book.svg")
-                )
+                return TypeMatcher.any(TypeMatcher.path("/book/"), TypeMatcher.img_src("_book.svg"))
             case IliasElementType.COURSE:
                 return TypeMatcher.any(TypeMatcher.path("/crs/"), TypeMatcher.img_src("_crsr.svg"))
             case IliasElementType.DCL_RECORD_LIST:
                 return TypeMatcher.any(
-                    TypeMatcher.img_src("_dcl.svg"),
-                    TypeMatcher.query("cmdclass=ildclrecordlistgui")
+                    TypeMatcher.img_src("_dcl.svg"), TypeMatcher.query("cmdclass=ildclrecordlistgui")
                 )
             case IliasElementType.EXERCISE:
                 return TypeMatcher.never()
@@ -162,14 +157,11 @@ class IliasElementType(Enum):
                 return TypeMatcher.any(
                     TypeMatcher.path("/fold/"),
                     TypeMatcher.img_src("_fold.svg"),
-
                     TypeMatcher.path("/grp/"),
                     TypeMatcher.img_src("_grp.svg"),
-
                     TypeMatcher.path("/copa/"),
                     TypeMatcher.path("_copa_"),
                     TypeMatcher.img_src("_copa.svg"),
-
                     # Not supported right now but warn users
                     # TypeMatcher.query("baseclass=ilmediapoolpresentationgui"),
                     # TypeMatcher.img_alt("medienpool"),
@@ -188,14 +180,10 @@ class IliasElementType(Enum):
             case IliasElementType.LITERATURE_LIST:
                 return TypeMatcher.img_src("_bibl.svg")
             case IliasElementType.LEARNING_MODULE:
-                return TypeMatcher.any(
-                    TypeMatcher.path("/lm/"),
-                    TypeMatcher.img_src("_lm.svg")
-                )
+                return TypeMatcher.any(TypeMatcher.path("/lm/"), TypeMatcher.img_src("_lm.svg"))
             case IliasElementType.LEARNING_MODULE_HTML:
                 return TypeMatcher.any(
-                    TypeMatcher.query("baseclass=ilhtlmpresentationgui"),
-                    TypeMatcher.img_src("_htlm.svg")
+                    TypeMatcher.query("baseclass=ilhtlmpresentationgui"), TypeMatcher.img_src("_htlm.svg")
                 )
             case IliasElementType.LINK:
                 return TypeMatcher.any(
@@ -203,17 +191,16 @@ class IliasElementType(Enum):
                         TypeMatcher.query("baseclass=illinkresourcehandlergui"),
                         TypeMatcher.query("calldirectlink"),
                     ),
-                    TypeMatcher.img_src("_webr.svg")  # duplicated :(
+                    TypeMatcher.img_src("_webr.svg"),  # duplicated :(
                 )
             case IliasElementType.LINK_COLLECTION:
                 return TypeMatcher.any(
                     TypeMatcher.query("baseclass=illinkresourcehandlergui"),
-                    TypeMatcher.img_src("_webr.svg")  # duplicated :(
+                    TypeMatcher.img_src("_webr.svg"),  # duplicated :(
                 )
             case IliasElementType.MEDIA_POOL:
                 return TypeMatcher.any(
-                    TypeMatcher.query("baseclass=ilmediapoolpresentationgui"),
-                    TypeMatcher.img_src("_mep.svg")
+                    TypeMatcher.query("baseclass=ilmediapoolpresentationgui"), TypeMatcher.img_src("_mep.svg")
                 )
             case IliasElementType.MEDIACAST_VIDEO:
                 return TypeMatcher.never()
@@ -221,12 +208,10 @@ class IliasElementType(Enum):
                 return TypeMatcher.any(
                     TypeMatcher.path("/mcst/"),
                     TypeMatcher.query("baseclass=ilmediacasthandlergui"),
-                    TypeMatcher.img_src("_mcst.svg")
+                    TypeMatcher.img_src("_mcst.svg"),
                 )
             case IliasElementType.MEETING:
-                return TypeMatcher.any(
-                    TypeMatcher.img_src("_sess.svg")
-                )
+                return TypeMatcher.any(TypeMatcher.img_src("_sess.svg"))
             case IliasElementType.MOB_VIDEO:
                 return TypeMatcher.never()
             case IliasElementType.OPENCAST_VIDEO:
@@ -239,24 +224,19 @@ class IliasElementType(Enum):
                 return TypeMatcher.never()
             case IliasElementType.SCORM_LEARNING_MODULE:
                 return TypeMatcher.any(
-                    TypeMatcher.query("baseclass=ilsahspresentationgui"),
-                    TypeMatcher.img_src("_sahs.svg")
+                    TypeMatcher.query("baseclass=ilsahspresentationgui"), TypeMatcher.img_src("_sahs.svg")
                 )
             case IliasElementType.SURVEY:
-                return TypeMatcher.any(
-                    TypeMatcher.path("/svy/"),
-                    TypeMatcher.img_src("svy.svg")
-                )
+                return TypeMatcher.any(TypeMatcher.path("/svy/"), TypeMatcher.img_src("svy.svg"))
             case IliasElementType.TEST:
                 return TypeMatcher.any(
                     TypeMatcher.query("cmdclass=ilobjtestgui"),
                     TypeMatcher.query("cmdclass=iltestscreengui"),
-                    TypeMatcher.img_src("_tst.svg")
+                    TypeMatcher.img_src("_tst.svg"),
                 )
             case IliasElementType.WIKI:
                 return TypeMatcher.any(
-                    TypeMatcher.query("baseClass=ilwikihandlergui"),
-                    TypeMatcher.img_src("wiki.svg")
+                    TypeMatcher.query("baseClass=ilwikihandlergui"), TypeMatcher.img_src("wiki.svg")
                 )
 
         raise CrawlWarning(f"Unknown matcher {self}")
@@ -291,7 +271,7 @@ class IliasPageElement:
             r"thr_pk=(?P<id>\d+)",  # forums
             r"ref_id=(?P<id>\d+)",
             r"target=[a-z]+_(?P<id>\d+)",
-            r"mm_(?P<id>\d+)"
+            r"mm_(?P<id>\d+)",
         ]
 
         for regex in regexes:
@@ -309,8 +289,8 @@ class IliasPageElement:
         name: str,
         mtime: Optional[datetime] = None,
         description: Optional[str] = None,
-        skip_sanitize: bool = False
-    ) -> 'IliasPageElement':
+        skip_sanitize: bool = False,
+    ) -> "IliasPageElement":
         if typ == IliasElementType.MEETING:
             normalized = IliasPageElement._normalize_meeting_name(name)
             log.explain(f"Normalized meeting name from {name!r} to {normalized!r}")
@@ -329,7 +309,7 @@ class IliasPageElement:
         """
 
         # This checks whether we can reach a `:` without passing a `-`
-        if re.search(r"^[^-]+: ", meeting_name):
+        if re.search(r"^[^-]+: ", meeting_name):  # noqa: SIM108
             # Meeting name only contains date: "05. Jan 2000:"
             split_delimiter = ":"
         else:
@@ -352,7 +332,7 @@ class IliasPageElement:
 @dataclass
 class IliasDownloadForumData:
     url: str
-    form_data: Dict[str, Union[str, list[str]]]
+    form_data: dict[str, str | list[str]]
     empty: bool
 
 
@@ -382,7 +362,6 @@ class IliasSoup:
 
 
 class IliasPage:
-
     def __init__(self, ilias_soup: IliasSoup, source_element: Optional[IliasPageElement]):
         self._ilias_soup = ilias_soup
         self._soup = ilias_soup.soup
@@ -422,23 +401,23 @@ class IliasPage:
         return self._find_normal_entries()
 
     def get_info_tab(self) -> Optional[IliasPageElement]:
-        tab: Optional[Tag] = cast(Optional[Tag], self._soup.find(
-            name="a",
-            attrs={"href": lambda x: x is not None and "cmdClass=ilinfoscreengui" in x}
-        ))
+        tab: Optional[Tag] = self._soup.find(
+            name="a", attrs={"href": lambda x: x is not None and "cmdClass=ilinfoscreengui" in x}
+        )
         if tab is not None:
             return IliasPageElement.create_new(
-                IliasElementType.INFO_TAB,
-                self._abs_url_from_link(tab),
-                "infos"
+                IliasElementType.INFO_TAB, self._abs_url_from_link(tab), "infos"
             )
         return None
 
     def get_description(self) -> Optional[BeautifulSoup]:
-        def is_interesting_class(name: str) -> bool:
+        def is_interesting_class(name: str | None) -> bool:
             return name in [
-                "ilCOPageSection", "ilc_Paragraph", "ilc_va_ihcap_VAccordIHeadCap",
-                "ilc_va_ihcap_AccordIHeadCap", "ilc_media_cont_MediaContainer"
+                "ilCOPageSection",
+                "ilc_Paragraph",
+                "ilc_va_ihcap_VAccordIHeadCap",
+                "ilc_va_ihcap_AccordIHeadCap",
+                "ilc_media_cont_MediaContainer",
             ]
 
         paragraphs: list[Tag] = cast(list[Tag], self._soup.find_all(class_=is_interesting_class))
@@ -452,21 +431,20 @@ class IliasPage:
         for p in paragraphs:
             if p.find_parent(class_=is_interesting_class):
                 continue
-            if "ilc_media_cont_MediaContainer" in p["class"]:
+            if "ilc_media_cont_MediaContainer" in p["class"] and (video := p.select_one("video")):
                 # We have an embedded video which should be downloaded by _find_mob_videos
-                if video := p.select_one("video"):
-                    url, title = self._find_mob_video_url_title(video, p)
-                    raw_html += '<div style="min-width: 100px; min-height: 100px; border: 1px solid black;'
-                    raw_html += 'display: flex; justify-content: center; align-items: center;'
-                    raw_html += ' margin: 0.5rem;">'
-                    if url is not None and urlparse(url).hostname != urlparse(self._page_url).hostname:
-                        if url.startswith("//"):
-                            url = "https:" + url
-                        raw_html += f'<a href="{url}" target="_blank">External Video: {title}</a>'
-                    else:
-                        raw_html += f"Video elided. Filename: '{title}'."
-                    raw_html += "</div>\n"
-                    continue
+                url, title = self._find_mob_video_url_title(video, p)
+                raw_html += '<div style="min-width: 100px; min-height: 100px; border: 1px solid black;'
+                raw_html += "display: flex; justify-content: center; align-items: center;"
+                raw_html += ' margin: 0.5rem;">'
+                if url is not None and urlparse(url).hostname != urlparse(self._page_url).hostname:
+                    if url.startswith("//"):
+                        url = "https:" + url
+                    raw_html += f'<a href="{url}" target="_blank">External Video: {title}</a>'
+                else:
+                    raw_html += f"Video elided. Filename: '{title}'."
+                raw_html += "</div>\n"
+                continue
 
             # Ignore special listings (like folder groupings)
             if "ilc_section_Special" in p["class"]:
@@ -486,7 +464,7 @@ class IliasPage:
             title=title,
             content=content,
             next_url=self._find_learning_module_next(),
-            previous_url=self._find_learning_module_prev()
+            previous_url=self._find_learning_module_prev(),
         )
 
     def _find_learning_module_next(self) -> Optional[str]:
@@ -515,10 +493,7 @@ class IliasPage:
         base_url = re.sub(r"cmd=\w+", "cmd=post", base_url)
         base_url = re.sub(r"cmdClass=\w+", "cmdClass=ilExportGUI", base_url)
 
-        rtoken_form = cast(
-            Optional[Tag],
-            self._soup.find("form", attrs={"action": lambda x: x is not None and "rtoken=" in x})
-        )
+        rtoken_form = self._soup.find("form", attrs={"action": lambda x: x is not None and "rtoken=" in x})
         if not rtoken_form:
             log.explain("Found no rtoken anywhere")
             return None
@@ -557,9 +532,7 @@ class IliasPage:
             return True
 
         # Raw listing without ILIAS fluff
-        video_element_table = self._soup.find(
-            name="table", id=re.compile(r"tbl_xoct_.+")
-        )
+        video_element_table = self._soup.find(name="table", id=re.compile(r"tbl_xoct_.+"))
         return video_element_table is not None
 
     def _is_ilias_opencast_embedding(self) -> bool:
@@ -600,24 +573,23 @@ class IliasPage:
         return self._uncollapse_future_meetings_url() is not None
 
     def _uncollapse_future_meetings_url(self) -> Optional[IliasPageElement]:
-        element = cast(Optional[Tag], self._soup.find(
+        element = self._soup.find(
             "a",
-            attrs={"href": lambda x: x is not None and ("crs_next_sess=1" in x or "crs_prev_sess=1" in x)}
-        ))
+            attrs={"href": lambda x: x is not None and ("crs_next_sess=1" in x or "crs_prev_sess=1" in x)},
+        )
         if not element:
             return None
         link = self._abs_url_from_link(element)
         return IliasPageElement.create_new(IliasElementType.FOLDER, link, "show all meetings")
 
     def _is_exercise_not_all_shown(self) -> bool:
-        return (self._page_type == IliasElementType.EXERCISE_OVERVIEW
-                and "mode=all" not in self._page_url.lower())
+        return (
+            self._page_type == IliasElementType.EXERCISE_OVERVIEW and "mode=all" not in self._page_url.lower()
+        )
 
     def _show_all_exercises(self) -> Optional[IliasPageElement]:
         return IliasPageElement.create_new(
-            IliasElementType.EXERCISE_OVERVIEW,
-            self._page_url + "&mode=all",
-            "show all exercises"
+            IliasElementType.EXERCISE_OVERVIEW, self._page_url + "&mode=all", "show all exercises"
         )
 
     def _is_content_tab_selected(self) -> bool:
@@ -631,14 +603,13 @@ class IliasPage:
         return "baseClass=ilmembershipoverviewgui" in self._page_url
 
     def _select_content_page_url(self) -> Optional[IliasPageElement]:
-        tab = cast(Optional[Tag], self._soup.find(
-            id="tab_view_content",
-            attrs={"class": lambda x: x is not None and "active" not in x}
-        ))
+        tab = self._soup.find(
+            id="tab_view_content", attrs={"class": lambda x: x is not None and "active" not in x}
+        )
         # Already selected (or not found)
         if not tab:
             return None
-        link = cast(Optional[Tag], tab.find("a"))
+        link = tab.find("a")
         if link:
             link_str = self._abs_url_from_link(link)
             return IliasPageElement.create_new(IliasElementType.FOLDER, link_str, "select content page")
@@ -654,9 +625,7 @@ class IliasPage:
         # on the page, but defined in a JS object inside a script tag, passed to the player
         # library.
         # We do the impossible and RegEx the stream JSON object out of the page's HTML source
-        regex = re.compile(
-            r"({\"streams\"[\s\S]+?),\s*{\"paella_config_file", re.IGNORECASE
-        )
+        regex = re.compile(r"({\"streams\"[\s\S]+?),\s*{\"paella_config_file", re.IGNORECASE)
         json_match = regex.search(str(self._soup))
 
         if json_match is None:
@@ -687,10 +656,9 @@ class IliasPage:
     def _get_show_max_forum_entries_per_page_url(
         self, wanted_max: Optional[int] = None
     ) -> Optional[IliasPageElement]:
-        correct_link = cast(Optional[Tag], self._soup.find(
-            "a",
-            attrs={"href": lambda x: x is not None and "trows=800" in x and "cmd=showThreads" in x}
-        ))
+        correct_link = self._soup.find(
+            "a", attrs={"href": lambda x: x is not None and "trows=800" in x and "cmd=showThreads" in x}
+        )
 
         if not correct_link:
             return None
@@ -721,7 +689,7 @@ class IliasPage:
 
         titles: list[Tag] = self._soup.select("#block_pditems_0 .il-item-title")
         for title in titles:
-            link = cast(Optional[Tag], title.find("a"))
+            link = title.find("a")
 
             if not link:
                 log.explain(f"Skipping offline item: {title.get_text().strip()!r}")
@@ -775,11 +743,11 @@ class IliasPage:
                 continue
             if "cmd=sendfile" not in link["href"]:
                 continue
-            items.append(IliasPageElement.create_new(
-                IliasElementType.FILE,
-                self._abs_url_from_link(link),
-                _sanitize_path_name(link.get_text())
-            ))
+            items.append(
+                IliasPageElement.create_new(
+                    IliasElementType.FILE, self._abs_url_from_link(link), _sanitize_path_name(link.get_text())
+                )
+            )
 
         return items
 
@@ -791,9 +759,7 @@ class IliasPage:
         #
         # We need to figure out where we are.
 
-        video_element_table = cast(Optional[Tag], self._soup.find(
-            name="table", id=re.compile(r"tbl_xoct_.+")
-        ))
+        video_element_table = self._soup.find(name="table", id=re.compile(r"tbl_xoct_.+"))
 
         if video_element_table is None:
             # We are in stage 1
@@ -809,14 +775,14 @@ class IliasPage:
 
         is_paginated = self._soup.find(id=re.compile(r"tab_page_sel.+")) is not None
 
-        if is_paginated and not self._page_type == IliasElementType.OPENCAST_VIDEO_FOLDER:
+        if is_paginated and self._page_type != IliasElementType.OPENCAST_VIDEO_FOLDER:
             # We are in stage 2 - try to break pagination
             return self._find_opencast_video_entries_paginated()
 
         return self._find_opencast_video_entries_no_paging()
 
     def _find_opencast_video_entries_paginated(self) -> list[IliasPageElement]:
-        table_element = cast(Optional[Tag], self._soup.find(name="table", id=re.compile(r"tbl_xoct_.+")))
+        table_element = self._soup.find(name="table", id=re.compile(r"tbl_xoct_.+"))
 
         if table_element is None:
             log.warn("Couldn't increase elements per page (table not found). I might miss elements.")
@@ -829,8 +795,7 @@ class IliasPage:
 
         table_id = id_match.group(1)
 
-        query_params = {f"tbl_xoct_{table_id}_trows": "800",
-                        "cmd": "asyncGetTableGUI", "cmdMode": "asynch"}
+        query_params = {f"tbl_xoct_{table_id}_trows": "800", "cmd": "asyncGetTableGUI", "cmdMode": "asynch"}
         url = url_set_query_params(self._page_url, query_params)
 
         log.explain("Disabled pagination, retrying folder as a new entry")
@@ -841,9 +806,9 @@ class IliasPage:
         Crawls the "second stage" video page. This page contains the actual video urls.
         """
         # Video start links are marked with an "Abspielen" link
-        video_links = cast(list[Tag], self._soup.find_all(
-            name="a", text=re.compile(r"\s*(Abspielen|Play)\s*")
-        ))
+        video_links = cast(
+            list[Tag], self._soup.find_all(name="a", text=re.compile(r"\s*(Abspielen|Play)\s*"))
+        )
 
         results: list[IliasPageElement] = []
 
@@ -860,9 +825,7 @@ class IliasPage:
         row: Tag = link.parent.parent.parent  # type: ignore
         column_count = len(row.select("td.std"))
         for index in range(column_count, 0, -1):
-            modification_string = link.parent.parent.parent.select_one(  # type: ignore
-                f"td.std:nth-child({index})"
-            ).get_text().strip()
+            modification_string = cast(Tag, row.select_one(f"td.std:nth-child({index})")).get_text().strip()
             if match := re.search(r"\d+\.\d+.\d+ \d+:\d+", modification_string):
                 modification_time = datetime.strptime(match.group(0), "%d.%m.%Y %H:%M")
                 break
@@ -871,7 +834,7 @@ class IliasPage:
             log.warn(f"Could not determine upload time for {link}")
             modification_time = datetime.now()
 
-        title = link.parent.parent.parent.select_one("td.std:nth-child(3)").get_text().strip()  # type: ignore
+        title = cast(Tag, row.select_one("td.std:nth-child(3)")).get_text().strip()
         title += ".mp4"
 
         video_name: str = _sanitize_path_name(title)
@@ -899,27 +862,31 @@ class IliasPage:
     def _find_exercise_entries_detail_page(self) -> list[IliasPageElement]:
         results: list[IliasPageElement] = []
 
-        if link := cast(Optional[Tag], self._soup.select_one("#tab_submission > a")):
-            results.append(IliasPageElement.create_new(
-                IliasElementType.EXERCISE_FILES,
-                self._abs_url_from_link(link),
-                "Submission"
-            ))
+        if link := self._soup.select_one("#tab_submission > a"):
+            results.append(
+                IliasPageElement.create_new(
+                    IliasElementType.EXERCISE_FILES, self._abs_url_from_link(link), "Submission"
+                )
+            )
         else:
             log.explain("Found no submission link for exercise, maybe it has not started yet?")
 
         # Find all download links in the container (this will contain all the *feedback* files)
-        download_links = cast(list[Tag], self._soup.find_all(
-            name="a",
-            # download links contain the given command class
-            attrs={"href": lambda x: x is not None and "cmd=download" in x},
-            text="Download"
-        ))
+        download_links = cast(
+            list[Tag],
+            self._soup.find_all(
+                name="a",
+                # download links contain the given command class
+                attrs={"href": lambda x: x is not None and "cmd=download" in x},
+                text="Download",
+            ),
+        )
 
         for link in download_links:
-            parent_row: Tag = cast(Tag, link.find_parent(
-                attrs={"class": lambda x: x is not None and "row" in x}))
-            name_tag = cast(Optional[Tag], parent_row.find(name="div"))
+            parent_row: Tag = cast(
+                Tag, link.find_parent(attrs={"class": lambda x: x is not None and "row" in x})
+            )
+            name_tag = parent_row.find(name="div")
 
             if not name_tag:
                 log.warn("Could not find name tag for exercise entry")
@@ -929,11 +896,9 @@ class IliasPage:
             name = _sanitize_path_name(name_tag.get_text().strip())
             log.explain(f"Found exercise detail entry {name!r}")
 
-            results.append(IliasPageElement.create_new(
-                IliasElementType.FILE,
-                self._abs_url_from_link(link),
-                name
-            ))
+            results.append(
+                IliasPageElement.create_new(IliasElementType.FILE, self._abs_url_from_link(link), name)
+            )
 
         return results
 
@@ -941,12 +906,15 @@ class IliasPage:
         results: list[IliasPageElement] = []
 
         # Find all download links in the container
-        download_links = cast(list[Tag], self._soup.find_all(
-            name="a",
-            # download links contain the given command class
-            attrs={"href": lambda x: x is not None and "cmd=download" in x},
-            text="Download"
-        ))
+        download_links = cast(
+            list[Tag],
+            self._soup.find_all(
+                name="a",
+                # download links contain the given command class
+                attrs={"href": lambda x: x is not None and "cmd=download" in x},
+                text="Download",
+            ),
+        )
 
         for link in download_links:
             parent_row: Tag = cast(Tag, link.find_parent("tr"))
@@ -963,19 +931,16 @@ class IliasPage:
             if date is None:
                 log.warn(f"Date parsing failed for exercise file entry {name!r}")
 
-            results.append(IliasPageElement.create_new(
-                IliasElementType.FILE,
-                self._abs_url_from_link(link),
-                name,
-                date
-            ))
+            results.append(
+                IliasPageElement.create_new(IliasElementType.FILE, self._abs_url_from_link(link), name, date)
+            )
 
         return results
 
     def _find_exercise_entries_root_page(self) -> list[IliasPageElement]:
         results: list[IliasPageElement] = []
 
-        content_tab = cast(Optional[Tag], self._soup.find(id="ilContentContainer"))
+        content_tab = self._soup.find(id="ilContentContainer")
         if not content_tab:
             log.warn("Could not find content tab in exercise overview page")
             _unexpected_html_warning()
@@ -993,11 +958,11 @@ class IliasPage:
                 continue
 
             name = _sanitize_path_name(exercise.get_text().strip())
-            results.append(IliasPageElement.create_new(
-                IliasElementType.EXERCISE,
-                self._abs_url_from_link(exercise),
-                name
-            ))
+            results.append(
+                IliasPageElement.create_new(
+                    IliasElementType.EXERCISE, self._abs_url_from_link(exercise), name
+                )
+            )
 
         for result in results:
             log.explain(f"Found exercise {result.name!r}")
@@ -1043,13 +1008,11 @@ class IliasPage:
                 continue
 
             log.explain(f"Found {element_name!r} of type {element_type}")
-            result.append(IliasPageElement.create_new(
-                element_type,
-                abs_url,
-                element_name,
-                description=description,
-                skip_sanitize=True
-            ))
+            result.append(
+                IliasPageElement.create_new(
+                    element_type, abs_url, element_name, description=description, skip_sanitize=True
+                )
+            )
 
         result += self._find_cards()
         result += self._find_mediacast_videos()
@@ -1086,11 +1049,13 @@ class IliasPage:
                     if not title.endswith(".mp4") and not title.endswith(".webm"):
                         # just to make sure it has some kinda-alrightish ending
                         title = title + ".mp4"
-                    videos.append(IliasPageElement.create_new(
-                        typ=IliasElementType.MEDIACAST_VIDEO,
-                        url=self._abs_url_from_relative(cast(str, url)),
-                        name=_sanitize_path_name(title)
-                    ))
+                    videos.append(
+                        IliasPageElement.create_new(
+                            typ=IliasElementType.MEDIACAST_VIDEO,
+                            url=self._abs_url_from_relative(cast(str, url)),
+                            name=_sanitize_path_name(title),
+                        )
+                    )
 
         return videos
 
@@ -1114,12 +1079,11 @@ class IliasPage:
                 log.explain(f"Found external video at {url}, ignoring")
                 continue
 
-            videos.append(IliasPageElement.create_new(
-                typ=IliasElementType.MOB_VIDEO,
-                url=url,
-                name=_sanitize_path_name(title),
-                mtime=None
-            ))
+            videos.append(
+                IliasPageElement.create_new(
+                    typ=IliasElementType.MOB_VIDEO, url=url, name=_sanitize_path_name(title), mtime=None
+                )
+            )
 
         return videos
 
@@ -1133,7 +1097,7 @@ class IliasPage:
         if url is None and video_element.get("src"):
             url = cast(Optional[str], video_element.get("src"))
 
-        fig_caption = cast(Optional[Tag], figure.select_one("figcaption"))
+        fig_caption = figure.select_one("figcaption")
         if fig_caption:
             title = cast(Tag, figure.select_one("figcaption")).get_text().strip() + ".mp4"
         elif url is not None:
@@ -1161,11 +1125,11 @@ class IliasPage:
 
             # We should not crawl files under meetings
             if "ilContainerListItemContentCB" in cast(str, parent.get("class")):
-                link: Tag = parent.parent.find("a")  # type: ignore
+                link: Tag = cast(Tag, cast(Tag, parent.parent).find("a"))
                 typ = IliasPage._find_type_for_element(
                     "meeting",
                     self._abs_url_from_link(link),
-                    lambda: IliasPage._find_icon_for_folder_entry(link)
+                    lambda: IliasPage._find_icon_for_folder_entry(link),
                 )
                 return typ == IliasElementType.MEETING
 
@@ -1179,6 +1143,9 @@ class IliasPage:
         """
         found_titles = []
 
+        if None == "hey":
+            pass
+
         outer_accordion_content: Optional[Tag] = None
 
         parents: list[Tag] = list(tag.parents)
@@ -1191,9 +1158,11 @@ class IliasPage:
 
             # This is for these weird JS-y blocks and custom item groups
             if "ilContainerItemsContainer" in cast(str, parent.get("class")):
-                data_store_url = parent.parent.get("data-store-url", "").lower()  # type: ignore
-                is_custom_item_group = "baseclass=ilcontainerblockpropertiesstoragegui" in data_store_url \
-                                       and "cont_block_id=" in data_store_url
+                data_store_url = cast(str, cast(Tag, parent.parent).get("data-store-url", "")).lower()
+                is_custom_item_group = (
+                    "baseclass=ilcontainerblockpropertiesstoragegui" in data_store_url
+                    and "cont_block_id=" in data_store_url
+                )
                 # I am currently under the impression that *only* those JS blocks have an
                 # ilNoDisplay class.
                 if not is_custom_item_group and "ilNoDisplay" not in cast(str, parent.get("class")):
@@ -1212,11 +1181,15 @@ class IliasPage:
 
         if outer_accordion_content:
             accordion_tag = cast(Tag, outer_accordion_content.parent)
-            head_tag = cast(Tag, accordion_tag.find(attrs={
-                "class": lambda x: x is not None and (
-                    "ilc_va_ihead_VAccordIHead" in x or "ilc_va_ihead_AccordIHead" in x
-                )
-            }))
+            head_tag = cast(
+                Tag,
+                accordion_tag.find(
+                    attrs={
+                        "class": lambda x: x is not None
+                        and ("ilc_va_ihead_VAccordIHead" in x or "ilc_va_ihead_AccordIHead" in x)
+                    }
+                ),
+            )
             found_titles.append(head_tag.get_text().strip())
 
         return [_sanitize_path_name(x) for x in reversed(found_titles)]
@@ -1224,14 +1197,12 @@ class IliasPage:
     @staticmethod
     def _find_link_description(link: Tag) -> Optional[str]:
         tile = cast(
-            Tag,
-            link.find_parent("div", {"class": lambda x: x is not None and "il_ContainerListItem" in x})
+            Tag, link.find_parent("div", {"class": lambda x: x is not None and "il_ContainerListItem" in x})
         )
         if not tile:
             return None
         description_element = cast(
-            Tag,
-            tile.find("div", {"class": lambda x: x is not None and "il_Description" in x})
+            Tag, tile.find("div", {"class": lambda x: x is not None and "il_Description" in x})
         )
         if not description_element:
             return None
@@ -1242,9 +1213,15 @@ class IliasPage:
         # Files have a list of properties (type, modification date, size, etc.)
         # In a series of divs.
         # Find the parent containing all those divs, so we can filter our what we need
-        properties_parent = cast(Tag, cast(Tag, link_element.find_parent(
-            "div", {"class": lambda x: "il_ContainerListItem" in x}
-        )).select_one(".il_ItemProperties"))
+        properties_parent = cast(
+            Tag,
+            cast(
+                Tag,
+                link_element.find_parent(
+                    "div", {"class": lambda x: x is not None and "il_ContainerListItem" in x}
+                ),
+            ).select_one(".il_ItemProperties"),
+        )
         # The first one is always the filetype
         file_type = cast(Tag, properties_parent.select_one("span.il_ItemProperty")).get_text().strip()
 
@@ -1271,9 +1248,7 @@ class IliasPage:
         for title in card_titles:
             url = self._abs_url_from_link(title)
             name = _sanitize_path_name(title.get_text().strip())
-            typ = IliasPage._find_type_for_element(
-                name, url, lambda: IliasPage._find_icon_from_card(title)
-            )
+            typ = IliasPage._find_type_for_element(name, url, lambda: IliasPage._find_icon_from_card(title))
 
             if not typ:
                 _unexpected_html_warning()
@@ -1300,18 +1275,16 @@ class IliasPage:
                 continue
             url = self._abs_url_from_relative(open_match.group(1))
             name = _sanitize_path_name(button.get_text().strip())
-            typ = IliasPage._find_type_for_element(
-                name, url, lambda: IliasPage._find_icon_from_card(button)
+            typ = IliasPage._find_type_for_element(name, url, lambda: IliasPage._find_icon_from_card(button))
+            caption_parent = cast(
+                Tag,
+                button.find_parent(
+                    "div",
+                    attrs={"class": lambda x: x is not None and "caption" in x},
+                ),
             )
-            caption_parent = cast(Tag, button.find_parent(
-                "div",
-                attrs={"class": lambda x: x is not None and "caption" in x},
-            ))
             caption_container = caption_parent.find_next_sibling("div")
-            if caption_container:
-                description = caption_container.get_text().strip()
-            else:
-                description = None
+            description = caption_container.get_text().strip() if caption_container else None
 
             if not typ:
                 _unexpected_html_warning()
@@ -1377,9 +1350,7 @@ class IliasPage:
 
         if found_parent is None:
             _unexpected_html_warning()
-            log.warn_contd(
-                f"Tried to figure out element type, but did not find an icon for {link_element!r}"
-            )
+            log.warn_contd(f"Tried to figure out element type, but did not find an icon for {link_element!r}")
             return None
 
         # Find the small descriptive icon to figure out the type
@@ -1389,8 +1360,7 @@ class IliasPage:
             img_tag = found_parent.select_one("img.icon")
 
         is_session_expansion_button = found_parent.find(
-            "a",
-            attrs={"href": lambda x: x is not None and ("crs_next_sess=" in x or "crs_prev_sess=" in x)}
+            "a", attrs={"href": lambda x: x is not None and ("crs_next_sess=" in x or "crs_prev_sess=" in x)}
         )
         if img_tag is None and is_session_expansion_button:
             log.explain("Found session expansion button, skipping it as it has no content")
@@ -1426,7 +1396,7 @@ class IliasPage:
     def is_logged_in(ilias_soup: IliasSoup) -> bool:
         soup = ilias_soup.soup
         # Normal ILIAS pages
-        mainbar = cast(Optional[Tag], soup.find(class_="il-maincontrols-metabar"))
+        mainbar = soup.find(class_="il-maincontrols-metabar")
         if mainbar is not None:
             login_button = mainbar.find(attrs={"href": lambda x: x is not None and "login.php" in x})
             shib_login = soup.find(id="button_shib_login")
@@ -1447,23 +1417,18 @@ class IliasPage:
         # Video listing embeds do not have complete ILIAS html. Try to match them by
         # their video listing table
         video_table = soup.find(
-            recursive=True,
-            name="table",
-            attrs={"id": lambda x: x is not None and x.startswith("tbl_xoct")}
+            recursive=True, name="table", attrs={"id": lambda x: x is not None and x.startswith("tbl_xoct")}
         )
         if video_table is not None:
             return True
         # The individual video player wrapper page has nothing of the above.
         # Match it by its playerContainer.
-        if soup.select_one("#playerContainer") is not None:
-            return True
-        return False
+        return soup.select_one("#playerContainer") is not None
 
     @staticmethod
     def _find_date_in_text(text: str) -> Optional[datetime]:
         modification_date_match = re.search(
-            r"(((\d+\. \w+ \d+)|(Gestern|Yesterday)|(Heute|Today)|(Morgen|Tomorrow)), \d+:\d+)",
-            text
+            r"(((\d+\. \w+ \d+)|(Gestern|Yesterday)|(Heute|Today)|(Morgen|Tomorrow)), \d+:\d+)", text
         )
         if modification_date_match is not None:
             modification_date_str = modification_date_match.group(1)
@@ -1501,8 +1466,8 @@ def _unexpected_html_warning() -> None:
     log.warn("Encountered unexpected HTML structure, ignoring element.")
 
 
-german_months = ['Jan', 'Feb', 'Mär', 'Apr', 'Mai', 'Jun', 'Jul', 'Aug', 'Sep', 'Okt', 'Nov', 'Dez']
-english_months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
+german_months = ["Jan", "Feb", "Mär", "Apr", "Mai", "Jun", "Jul", "Aug", "Sep", "Okt", "Nov", "Dez"]
+english_months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
 
 
 def demangle_date(date_str: str, fail_silently: bool = False) -> Optional[datetime]:
@@ -1517,11 +1482,11 @@ def demangle_date(date_str: str, fail_silently: bool = False) -> Optional[dateti
         # Normalize whitespace because users
         date_str = re.sub(r"\s+", " ", date_str)
 
-        date_str = re.sub("Gestern|Yesterday", _format_date_english(_yesterday()), date_str, re.I)
-        date_str = re.sub("Heute|Today", _format_date_english(date.today()), date_str, re.I)
-        date_str = re.sub("Morgen|Tomorrow", _format_date_english(_tomorrow()), date_str, re.I)
+        date_str = re.sub("Gestern|Yesterday", _format_date_english(_yesterday()), date_str, flags=re.I)
+        date_str = re.sub("Heute|Today", _format_date_english(date.today()), date_str, flags=re.I)
+        date_str = re.sub("Morgen|Tomorrow", _format_date_english(_tomorrow()), date_str, flags=re.I)
         date_str = date_str.strip()
-        for german, english in zip(german_months, english_months):
+        for german, english in zip(german_months, english_months, strict=True):
             date_str = date_str.replace(german, english)
             # Remove trailing dots for abbreviations, e.g. "20. Apr. 2020" -> "20. Apr 2020"
             date_str = date_str.replace(english + ".", english)
@@ -1575,11 +1540,11 @@ def parse_ilias_forum_export(forum_export: BeautifulSoup) -> list[IliasForumThre
     elements = []
     for p in forum_export.select("body > p"):
         title_tag = p
-        content_tag = cast(Optional[Tag], p.find_next_sibling("ul"))
+        content_tag = p.find_next_sibling("ul")
 
         title = cast(Tag, p.find("b")).text
         if ":" in title:
-            title = title[title.find(":") + 1:]
+            title = title[title.find(":") + 1 :]
         title = title.strip()
 
         if not content_tag or content_tag.find_previous_sibling("p") != title_tag:
@@ -1604,7 +1569,7 @@ def _guess_timestamp_from_forum_post_content(content: Tag) -> Optional[datetime]
 
     for post in posts:
         text = post.text.strip()
-        text = text[text.rfind("|") + 1:]
+        text = text[text.rfind("|") + 1 :]
         date = demangle_date(text, fail_silently=True)
         if not date:
             continue

PFERD/crawl/ilias/kit_ilias_web_crawler.py

@@ -1,4 +1,4 @@
-from typing import Dict, Literal
+from typing import Literal
 
 from ...auth import Authenticator
 from ...config import Config
@@ -26,7 +26,7 @@ class KitIliasWebCrawler(IliasWebCrawler):
         name: str,
         section: KitIliasWebCrawlerSection,
         config: Config,
-        authenticators: Dict[str, Authenticator],
+        authenticators: dict[str, Authenticator],
     ):
         super().__init__(name, section, config, authenticators)
 

PFERD/crawl/ilias/shibboleth_login.py

@@ -38,9 +38,7 @@ class ShibbolethLogin:
         async with sess.get(url) as response:
             shib_url = response.url
             if str(shib_url).startswith(self._ilias_url):
-                log.explain(
-                    "ILIAS recognized our shib token and logged us in in the background, returning"
-                )
+                log.explain("ILIAS recognized our shib token and logged us in in the background, returning")
                 return
             soup: BeautifulSoup = soupify(await response.read())
 
@@ -81,7 +79,7 @@ class ShibbolethLogin:
         # (or clicking "Continue" if you have JS disabled)
         relay_state = cast(Tag, soup.find("input", {"name": "RelayState"}))
         saml_response = cast(Tag, soup.find("input", {"name": "SAMLResponse"}))
-        url = form = soup.find("form", {"method": "post"})["action"]  # type: ignore
+        url = cast(str, cast(Tag, soup.find("form", {"method": "post"}))["action"])
         data = {  # using the info obtained in the while loop above
             "RelayState": cast(str, relay_state["value"]),
             "SAMLResponse": cast(str, saml_response["value"]),

PFERD/crawl/kit_ipd_crawler.py

@@ -1,9 +1,11 @@
 import os
 import re
+from collections.abc import Awaitable, Generator, Iterable
 from dataclasses import dataclass
 from datetime import datetime
 from pathlib import PurePath
-from typing import Any, Awaitable, Generator, Iterable, List, Optional, Pattern, Tuple, Union, cast
+from re import Pattern
+from typing import Any, Optional, Union, cast
 from urllib.parse import urljoin
 
 from bs4 import BeautifulSoup, Tag
@@ -44,7 +46,7 @@ class KitIpdFile:
 @dataclass
 class KitIpdFolder:
     name: str
-    entries: List[Union[KitIpdFile, "KitIpdFolder"]]
+    entries: list[Union[KitIpdFile, "KitIpdFolder"]]
 
     def explain(self) -> None:
         log.explain_topic(f"Folder {self.name!r}")
@@ -53,12 +55,11 @@ class KitIpdFolder:
 
 
 class KitIpdCrawler(HttpCrawler):
-
     def __init__(
-            self,
-            name: str,
-            section: KitIpdCrawlerSection,
-            config: Config,
+        self,
+        name: str,
+        section: KitIpdCrawlerSection,
+        config: Config,
     ):
         super().__init__(name, section, config)
         self._url = section.target()
@@ -69,7 +70,7 @@ class KitIpdCrawler(HttpCrawler):
         if not maybe_cl:
             return
 
-        tasks: List[Awaitable[None]] = []
+        tasks: list[Awaitable[None]] = []
 
         async with maybe_cl:
             for item in await self._fetch_items():
@@ -104,11 +105,7 @@ class KitIpdCrawler(HttpCrawler):
         await self.gather(tasks)
 
     async def _download_file(
-        self,
-        parent: PurePath,
-        file: KitIpdFile,
-        etag: Optional[str],
-        mtime: Optional[datetime]
+        self, parent: PurePath, file: KitIpdFile, etag: Optional[str], mtime: Optional[datetime]
     ) -> None:
         element_path = parent / file.name
 
@@ -125,9 +122,9 @@ class KitIpdCrawler(HttpCrawler):
         async with maybe_dl as (bar, sink):
             await self._stream_from_url(file.url, element_path, sink, bar)
 
-    async def _fetch_items(self) -> Iterable[Union[KitIpdFile, KitIpdFolder]]:
+    async def _fetch_items(self) -> Iterable[KitIpdFile | KitIpdFolder]:
         page, url = await self.get_page()
-        elements: List[Tag] = self._find_file_links(page)
+        elements: list[Tag] = self._find_file_links(page)
 
         # do not add unnecessary nesting for a single <h1> heading
         drop_h1: bool = len(page.find_all(name="h1")) <= 1
@@ -156,7 +153,7 @@ class KitIpdCrawler(HttpCrawler):
         name = os.path.basename(url)
         return KitIpdFile(name, url)
 
-    def _find_file_links(self, tag: Union[Tag, BeautifulSoup]) -> list[Tag]:
+    def _find_file_links(self, tag: Tag | BeautifulSoup) -> list[Tag]:
         return cast(list[Tag], tag.find_all(name="a", attrs={"href": self._file_regex}))
 
     def _abs_url_from_link(self, url: str, link_tag: Tag) -> str:
@@ -177,7 +174,7 @@ class KitIpdCrawler(HttpCrawler):
 
             self._add_etag_to_report(path, resp.headers.get("ETag"))
 
-    async def get_page(self) -> Tuple[BeautifulSoup, str]:
+    async def get_page(self) -> tuple[BeautifulSoup, str]:
         async with self.session.get(self._url) as request:
             # The web page for Algorithmen für Routenplanung contains some
             # weird comments that beautifulsoup doesn't parse correctly. This

PFERD/crawl/local_crawler.py

@@ -18,31 +18,28 @@ class LocalCrawlerSection(CrawlerSection):
     def crawl_delay(self) -> float:
         value = self.s.getfloat("crawl_delay", fallback=0.0)
         if value < 0:
-            self.invalid_value("crawl_delay", value,
-                               "Must not be negative")
+            self.invalid_value("crawl_delay", value, "Must not be negative")
         return value
 
     def download_delay(self) -> float:
         value = self.s.getfloat("download_delay", fallback=0.0)
         if value < 0:
-            self.invalid_value("download_delay", value,
-                               "Must not be negative")
+            self.invalid_value("download_delay", value, "Must not be negative")
         return value
 
     def download_speed(self) -> Optional[int]:
         value = self.s.getint("download_speed")
         if value is not None and value <= 0:
-            self.invalid_value("download_speed", value,
-                               "Must be greater than 0")
+            self.invalid_value("download_speed", value, "Must be greater than 0")
         return value
 
 
 class LocalCrawler(Crawler):
     def __init__(
-            self,
-            name: str,
-            section: LocalCrawlerSection,
-            config: Config,
+        self,
+        name: str,
+        section: LocalCrawlerSection,
+        config: Config,
     ):
         super().__init__(name, section, config)
 
@@ -74,10 +71,12 @@ class LocalCrawler(Crawler):
         tasks = []
 
         async with cl:
-            await asyncio.sleep(random.uniform(
-                0.5 * self._crawl_delay,
-                self._crawl_delay,
-            ))
+            await asyncio.sleep(
+                random.uniform(
+                    0.5 * self._crawl_delay,
+                    self._crawl_delay,
+                )
+            )
 
             for child in path.iterdir():
                 pure_child = cl.path / child.name
@@ -93,10 +92,12 @@ class LocalCrawler(Crawler):
             return
 
         async with dl as (bar, sink):
-            await asyncio.sleep(random.uniform(
-                0.5 * self._download_delay,
-                self._download_delay,
-            ))
+            await asyncio.sleep(
+                random.uniform(
+                    0.5 * self._download_delay,
+                    self._download_delay,
+                )
+            )
 
             bar.set_total(stat.st_size)
 

PFERD/deduplicator.py

@@ -1,5 +1,5 @@
+from collections.abc import Iterator
 from pathlib import PurePath
-from typing import Iterator, Set
 
 from .logging import log
 from .utils import fmt_path
@@ -16,15 +16,34 @@ def name_variants(path: PurePath) -> Iterator[PurePath]:
 class Deduplicator:
     FORBIDDEN_CHARS = '<>:"/\\|?*' + "".join([chr(i) for i in range(0, 32)])
     FORBIDDEN_NAMES = {
-        "CON", "PRN", "AUX", "NUL",
-        "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",
-        "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9",
+        "CON",
+        "PRN",
+        "AUX",
+        "NUL",
+        "COM1",
+        "COM2",
+        "COM3",
+        "COM4",
+        "COM5",
+        "COM6",
+        "COM7",
+        "COM8",
+        "COM9",
+        "LPT1",
+        "LPT2",
+        "LPT3",
+        "LPT4",
+        "LPT5",
+        "LPT6",
+        "LPT7",
+        "LPT8",
+        "LPT9",
     }
 
     def __init__(self, windows_paths: bool) -> None:
         self._windows_paths = windows_paths
 
-        self._known: Set[PurePath] = set()
+        self._known: set[PurePath] = set()
 
     def _add(self, path: PurePath) -> None:
         self._known.add(path)

PFERD/limiter.py

@@ -1,8 +1,9 @@
 import asyncio
 import time
+from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
 from dataclasses import dataclass
-from typing import AsyncIterator, Optional
+from typing import Optional
 
 
 @dataclass
@@ -12,12 +13,7 @@ class Slot:
 
 
 class Limiter:
-    def __init__(
-            self,
-            task_limit: int,
-            download_limit: int,
-            task_delay: float
-    ):
+    def __init__(self, task_limit: int, download_limit: int, task_delay: float):
         if task_limit <= 0:
             raise ValueError("task limit must be at least 1")
         if download_limit <= 0:

PFERD/logging.py

@@ -1,15 +1,23 @@
 import asyncio
 import sys
 import traceback
+from collections.abc import AsyncIterator, Iterator
 from contextlib import AbstractContextManager, asynccontextmanager, contextmanager
-from typing import AsyncIterator, Iterator, List, Optional
+from typing import Any, Optional
 
 from rich.console import Console, Group
 from rich.live import Live
 from rich.markup import escape
 from rich.panel import Panel
-from rich.progress import (BarColumn, DownloadColumn, Progress, TaskID, TextColumn, TimeRemainingColumn,
-                           TransferSpeedColumn)
+from rich.progress import (
+    BarColumn,
+    DownloadColumn,
+    Progress,
+    TaskID,
+    TextColumn,
+    TimeRemainingColumn,
+    TransferSpeedColumn,
+)
 from rich.table import Column
 
 
@@ -53,7 +61,7 @@ class Log:
         self._showing_progress = False
         self._progress_suspended = False
         self._lock = asyncio.Lock()
-        self._lines: List[str] = []
+        self._lines: list[str] = []
 
         # Whether different parts of the output are enabled or disabled
         self.output_explain = False
@@ -114,7 +122,7 @@ class Log:
         for line in self._lines:
             self.print(line)
 
-    def print(self, text: str) -> None:
+    def print(self, text: Any) -> None:
         """
         Print a normal message. Allows markup.
         """
@@ -176,10 +184,14 @@ class Log:
         # Our print function doesn't take types other than strings, but the
         # underlying rich.print function does. This call is a special case
         # anyways, and we're calling it internally, so this should be fine.
-        self.print(Panel.fit("""
+        self.print(
+            Panel.fit(
+                """
 Please copy your program output and send it to the PFERD maintainers, either
 directly or as a GitHub issue: https://github.com/Garmelon/PFERD/issues/new
-        """.strip()))  # type: ignore
+        """.strip()
+            )
+        )
 
     def explain_topic(self, text: str) -> None:
         """
@@ -236,10 +248,10 @@ directly or as a GitHub issue: https://github.com/Garmelon/PFERD/issues/new
 
     @contextmanager
     def _bar(
-            self,
-            progress: Progress,
-            description: str,
-            total: Optional[float],
+        self,
+        progress: Progress,
+        description: str,
+        total: Optional[float],
     ) -> Iterator[ProgressBar]:
         if total is None:
             # Indeterminate progress bar
@@ -255,11 +267,11 @@ directly or as a GitHub issue: https://github.com/Garmelon/PFERD/issues/new
             self._update_live()
 
     def crawl_bar(
-            self,
-            style: str,
-            action: str,
-            text: str,
-            total: Optional[float] = None,
+        self,
+        style: str,
+        action: str,
+        text: str,
+        total: Optional[float] = None,
     ) -> AbstractContextManager[ProgressBar]:
         """
         Allows markup in the "style" argument which will be applied to the
@@ -271,11 +283,11 @@ directly or as a GitHub issue: https://github.com/Garmelon/PFERD/issues/new
         return self._bar(self._crawl_progress, description, total)
 
     def download_bar(
-            self,
-            style: str,
-            action: str,
-            text: str,
-            total: Optional[float] = None,
+        self,
+        style: str,
+        action: str,
+        text: str,
+        total: Optional[float] = None,
     ) -> AbstractContextManager[ProgressBar]:
         """
         Allows markup in the "style" argument which will be applied to the

PFERD/output_dir.py

@@ -4,12 +4,13 @@ import os
 import random
 import shutil
 import string
-from contextlib import contextmanager
+from collections.abc import Iterator
+from contextlib import contextmanager, suppress
 from dataclasses import dataclass
 from datetime import datetime
 from enum import Enum
 from pathlib import Path, PurePath
-from typing import BinaryIO, Iterator, Optional, Tuple
+from typing import BinaryIO, Optional
 
 from .logging import log
 from .report import Report, ReportLoadError
@@ -35,8 +36,7 @@ class Redownload(Enum):
         try:
             return Redownload(string)
         except ValueError:
-            raise ValueError("must be one of 'never', 'never-smart',"
-                             " 'always', 'always-smart'")
+            raise ValueError("must be one of 'never', 'never-smart', 'always', 'always-smart'") from None
 
 
 class OnConflict(Enum):
@@ -51,8 +51,10 @@ class OnConflict(Enum):
         try:
             return OnConflict(string)
         except ValueError:
-            raise ValueError("must be one of 'prompt', 'local-first',"
-                             " 'remote-first', 'no-delete', 'no-delete-prompt-overwrite'")
+            raise ValueError(
+                "must be one of 'prompt', 'local-first',"
+                " 'remote-first', 'no-delete', 'no-delete-prompt-overwrite'"
+            ) from None
 
 
 @dataclass
@@ -96,13 +98,13 @@ class FileSinkToken(ReusableAsyncContextManager[FileSink]):
     # download handed back to the OutputDirectory.
 
     def __init__(
-            self,
-            output_dir: "OutputDirectory",
-            remote_path: PurePath,
-            path: PurePath,
-            local_path: Path,
-            heuristics: Heuristics,
-            on_conflict: OnConflict,
+        self,
+        output_dir: "OutputDirectory",
+        remote_path: PurePath,
+        path: PurePath,
+        local_path: Path,
+        heuristics: Heuristics,
+        on_conflict: OnConflict,
     ):
         super().__init__()
 
@@ -118,15 +120,17 @@ class FileSinkToken(ReusableAsyncContextManager[FileSink]):
         sink = FileSink(file)
 
         async def after_download() -> None:
-            await self._output_dir._after_download(DownloadInfo(
-                self._remote_path,
-                self._path,
-                self._local_path,
-                tmp_path,
-                self._heuristics,
-                self._on_conflict,
-                sink.is_done(),
-            ))
+            await self._output_dir._after_download(
+                DownloadInfo(
+                    self._remote_path,
+                    self._path,
+                    self._local_path,
+                    tmp_path,
+                    self._heuristics,
+                    self._on_conflict,
+                    sink.is_done(),
+                )
+            )
 
         self._stack.push_async_callback(after_download)
         self._stack.enter_context(file)
@@ -138,10 +142,10 @@ class OutputDirectory:
     REPORT_FILE = PurePath(".report")
 
     def __init__(
-            self,
-            root: Path,
-            redownload: Redownload,
-            on_conflict: OnConflict,
+        self,
+        root: Path,
+        redownload: Redownload,
+        on_conflict: OnConflict,
     ):
         if os.name == "nt":
             # Windows limits the path length to 260 for some historical reason.
@@ -174,8 +178,8 @@ class OutputDirectory:
 
         try:
             self._root.mkdir(parents=True, exist_ok=True)
-        except OSError:
-            raise OutputDirError("Failed to create base directory")
+        except OSError as e:
+            raise OutputDirError("Failed to create base directory") from e
 
     def register_reserved(self, path: PurePath) -> None:
         self._report.mark_reserved(path)
@@ -193,11 +197,11 @@ class OutputDirectory:
         return self._root / path
 
     def _should_download(
-            self,
-            local_path: Path,
-            heuristics: Heuristics,
-            redownload: Redownload,
-            on_conflict: OnConflict,
+        self,
+        local_path: Path,
+        heuristics: Heuristics,
+        redownload: Redownload,
+        on_conflict: OnConflict,
     ) -> bool:
         if not local_path.exists():
             log.explain("No corresponding file present locally")
@@ -270,9 +274,9 @@ class OutputDirectory:
     # files.
 
     async def _conflict_lfrf(
-            self,
-            on_conflict: OnConflict,
-            path: PurePath,
+        self,
+        on_conflict: OnConflict,
+        path: PurePath,
     ) -> bool:
         if on_conflict in {OnConflict.PROMPT, OnConflict.NO_DELETE_PROMPT_OVERWRITE}:
             async with log.exclusive_output():
@@ -289,9 +293,9 @@ class OutputDirectory:
         raise ValueError(f"{on_conflict!r} is not a valid conflict policy")
 
     async def _conflict_ldrf(
-            self,
-            on_conflict: OnConflict,
-            path: PurePath,
+        self,
+        on_conflict: OnConflict,
+        path: PurePath,
     ) -> bool:
         if on_conflict in {OnConflict.PROMPT, OnConflict.NO_DELETE_PROMPT_OVERWRITE}:
             async with log.exclusive_output():
@@ -308,10 +312,10 @@ class OutputDirectory:
         raise ValueError(f"{on_conflict!r} is not a valid conflict policy")
 
     async def _conflict_lfrd(
-            self,
-            on_conflict: OnConflict,
-            path: PurePath,
-            parent: PurePath,
+        self,
+        on_conflict: OnConflict,
+        path: PurePath,
+        parent: PurePath,
     ) -> bool:
         if on_conflict in {OnConflict.PROMPT, OnConflict.NO_DELETE_PROMPT_OVERWRITE}:
             async with log.exclusive_output():
@@ -328,9 +332,9 @@ class OutputDirectory:
         raise ValueError(f"{on_conflict!r} is not a valid conflict policy")
 
     async def _conflict_delete_lf(
-            self,
-            on_conflict: OnConflict,
-            path: PurePath,
+        self,
+        on_conflict: OnConflict,
+        path: PurePath,
     ) -> bool:
         if on_conflict == OnConflict.PROMPT:
             async with log.exclusive_output():
@@ -353,9 +357,9 @@ class OutputDirectory:
         return base.parent / name
 
     async def _create_tmp_file(
-            self,
-            local_path: Path,
-    ) -> Tuple[Path, BinaryIO]:
+        self,
+        local_path: Path,
+    ) -> tuple[Path, BinaryIO]:
         """
         May raise an OutputDirError.
         """
@@ -388,14 +392,14 @@ class OutputDirectory:
         return self._should_download(local_path, heuristics, redownload, on_conflict)
 
     async def download(
-            self,
-            remote_path: PurePath,
-            path: PurePath,
-            *,
-            etag_differs: Optional[bool] = None,
-            mtime: Optional[datetime] = None,
-            redownload: Optional[Redownload] = None,
-            on_conflict: Optional[OnConflict] = None,
+        self,
+        remote_path: PurePath,
+        path: PurePath,
+        *,
+        etag_differs: Optional[bool] = None,
+        mtime: Optional[datetime] = None,
+        redownload: Optional[Redownload] = None,
+        on_conflict: Optional[OnConflict] = None,
     ) -> Optional[FileSinkToken]:
         """
         May throw an OutputDirError, a MarkDuplicateError or a
@@ -506,10 +510,8 @@ class OutputDirectory:
             await self._cleanup(child, pure_child)
 
         if delete_self:
-            try:
+            with suppress(OSError):
                 path.rmdir()
-            except OSError:
-                pass
 
     async def _cleanup_file(self, path: Path, pure: PurePath) -> None:
         if self._report.is_marked(pure):

PFERD/pferd.py

@@ -1,5 +1,5 @@
 from pathlib import Path, PurePath
-from typing import Dict, List, Optional
+from typing import Optional
 
 from rich.markup import escape
 
@@ -15,7 +15,7 @@ class PferdLoadError(Exception):
 
 
 class Pferd:
-    def __init__(self, config: Config, cli_crawlers: Optional[List[str]], cli_skips: Optional[List[str]]):
+    def __init__(self, config: Config, cli_crawlers: Optional[list[str]], cli_skips: Optional[list[str]]):
         """
         May throw PferdLoadError.
         """
@@ -23,10 +23,10 @@ class Pferd:
         self._config = config
         self._crawlers_to_run = self._find_crawlers_to_run(config, cli_crawlers, cli_skips)
 
-        self._authenticators: Dict[str, Authenticator] = {}
-        self._crawlers: Dict[str, Crawler] = {}
+        self._authenticators: dict[str, Authenticator] = {}
+        self._crawlers: dict[str, Crawler] = {}
 
-    def _find_config_crawlers(self, config: Config) -> List[str]:
+    def _find_config_crawlers(self, config: Config) -> list[str]:
         crawl_sections = []
 
         for name, section in config.crawl_sections():
@@ -37,7 +37,7 @@ class Pferd:
 
         return crawl_sections
 
-    def _find_cli_crawlers(self, config: Config, cli_crawlers: List[str]) -> List[str]:
+    def _find_cli_crawlers(self, config: Config, cli_crawlers: list[str]) -> list[str]:
         if len(cli_crawlers) != len(set(cli_crawlers)):
             raise PferdLoadError("Some crawlers were selected multiple times")
 
@@ -66,14 +66,14 @@ class Pferd:
         return crawlers_to_run
 
     def _find_crawlers_to_run(
-            self,
-            config: Config,
-            cli_crawlers: Optional[List[str]],
-            cli_skips: Optional[List[str]],
-    ) -> List[str]:
+        self,
+        config: Config,
+        cli_crawlers: Optional[list[str]],
+        cli_skips: Optional[list[str]],
+    ) -> list[str]:
         log.explain_topic("Deciding which crawlers to run")
 
-        crawlers: List[str]
+        crawlers: list[str]
         if cli_crawlers is None:
             log.explain("No crawlers specified on CLI")
             log.explain("Running crawlers specified in config")
@@ -104,7 +104,7 @@ class Pferd:
 
     def _load_crawlers(self) -> None:
         # Cookie sharing
-        kit_ilias_web_paths: Dict[Authenticator, List[Path]] = {}
+        kit_ilias_web_paths: dict[Authenticator, list[Path]] = {}
 
         for name, section in self._config.crawl_sections():
             log.print(f"[bold bright_cyan]Loading[/] {escape(name)}")
@@ -117,9 +117,8 @@ class Pferd:
             crawler = crawler_constructor(name, section, self._config, self._authenticators)
             self._crawlers[name] = crawler
 
-            if self._config.default_section.share_cookies():
-                if isinstance(crawler, KitIliasWebCrawler):
-                    crawler.share_cookies(kit_ilias_web_paths)
+            if self._config.default_section.share_cookies() and isinstance(crawler, KitIliasWebCrawler):
+                crawler.share_cookies(kit_ilias_web_paths)
 
     def debug_transforms(self) -> None:
         for name in self._crawlers_to_run:

PFERD/report.py

@@ -1,6 +1,6 @@
 import json
 from pathlib import Path, PurePath
-from typing import Any, Dict, List, Optional, Set
+from typing import Any, Optional
 
 
 class ReportLoadError(Exception):
@@ -42,32 +42,32 @@ class Report:
 
     def __init__(self) -> None:
         # Paths found by the crawler, untransformed
-        self.found_paths: Set[PurePath] = set()
+        self.found_paths: set[PurePath] = set()
 
         # Files reserved for metadata files (e. g. the report file or cookies)
         # that can't be overwritten by user transforms and won't be cleaned up
         # at the end.
-        self.reserved_files: Set[PurePath] = set()
+        self.reserved_files: set[PurePath] = set()
 
         # Files found by the crawler, transformed. Only includes files that
         # were downloaded (or a download was attempted)
-        self.known_files: Set[PurePath] = set()
+        self.known_files: set[PurePath] = set()
 
-        self.added_files: Set[PurePath] = set()
-        self.changed_files: Set[PurePath] = set()
-        self.deleted_files: Set[PurePath] = set()
+        self.added_files: set[PurePath] = set()
+        self.changed_files: set[PurePath] = set()
+        self.deleted_files: set[PurePath] = set()
         # Files that should have been deleted by the cleanup but weren't
-        self.not_deleted_files: Set[PurePath] = set()
+        self.not_deleted_files: set[PurePath] = set()
 
         # Custom crawler-specific data
-        self.custom: Dict[str, Any] = dict()
+        self.custom: dict[str, Any] = dict()
 
         # Encountered errors and warnings
-        self.encountered_warnings: List[str] = []
-        self.encountered_errors: List[str] = []
+        self.encountered_warnings: list[str] = []
+        self.encountered_errors: list[str] = []
 
     @staticmethod
-    def _get_list_of_strs(data: Dict[str, Any], key: str) -> List[str]:
+    def _get_list_of_strs(data: dict[str, Any], key: str) -> list[str]:
         result: Any = data.get(key, [])
 
         if not isinstance(result, list):
@@ -80,8 +80,8 @@ class Report:
         return result
 
     @staticmethod
-    def _get_str_dictionary(data: Dict[str, Any], key: str) -> Dict[str, Any]:
-        result: Dict[str, Any] = data.get(key, {})
+    def _get_str_dictionary(data: dict[str, Any], key: str) -> dict[str, Any]:
+        result: dict[str, Any] = data.get(key, {})
 
         if not isinstance(result, dict):
             raise ReportLoadError(f"Incorrect format: {key!r} is not a dictionary")
@@ -170,7 +170,7 @@ class Report:
         self.known_files.add(path)
 
     @property
-    def marked(self) -> Set[PurePath]:
+    def marked(self) -> set[PurePath]:
         return self.known_files | self.reserved_files
 
     def is_marked(self, path: PurePath) -> bool:

PFERD/transformer.py

@@ -1,10 +1,12 @@
 import ast
+import contextlib
 import re
 from abc import ABC, abstractmethod
+from collections.abc import Callable, Sequence
 from dataclasses import dataclass
 from enum import Enum
 from pathlib import PurePath
-from typing import Callable, Dict, List, Optional, Sequence, TypeVar, Union
+from typing import Optional, TypeVar
 
 from .logging import log
 from .utils import fmt_path, str_path
@@ -23,7 +25,7 @@ class Empty:
     pass
 
 
-RightSide = Union[str, Ignore, Empty]
+RightSide = str | Ignore | Empty
 
 
 @dataclass
@@ -35,7 +37,7 @@ class Ignored:
     pass
 
 
-TransformResult = Optional[Union[Transformed, Ignored]]
+TransformResult = Transformed | Ignored | None
 
 
 @dataclass
@@ -47,7 +49,7 @@ class Rule:
     right: RightSide
     right_index: int
 
-    def right_result(self, path: PurePath) -> Union[str, Transformed, Ignored]:
+    def right_result(self, path: PurePath) -> str | Transformed | Ignored:
         if isinstance(self.right, str):
             return self.right
         elif isinstance(self.right, Ignore):
@@ -93,24 +95,20 @@ class ExactReTf(Transformation):
         # since elements of "match.groups()" can be None, mypy is wrong.
         groups: Sequence[Optional[str]] = [match[0]] + list(match.groups())
 
-        locals_dir: Dict[str, Union[str, int, float]] = {}
+        locals_dir: dict[str, str | int | float] = {}
         for i, group in enumerate(groups):
             if group is None:
                 continue
 
             locals_dir[f"g{i}"] = group
 
-            try:
+            with contextlib.suppress(ValueError):
                 locals_dir[f"i{i}"] = int(group)
-            except ValueError:
-                pass
 
-            try:
+            with contextlib.suppress(ValueError):
                 locals_dir[f"f{i}"] = float(group)
-            except ValueError:
-                pass
 
-        named_groups: Dict[str, str] = match.groupdict()
+        named_groups: dict[str, str] = match.groupdict()
         for name, capture in named_groups.items():
             locals_dir[name] = capture
 
@@ -208,7 +206,7 @@ class Line:
 
     @property
     def rest(self) -> str:
-        return self.line[self.index:]
+        return self.line[self.index :]
 
     def peek(self, amount: int = 1) -> str:
         return self.rest[:amount]
@@ -228,7 +226,7 @@ class Line:
         self.expect(string)
         return value
 
-    def one_of(self, parsers: List[Callable[[], T]], description: str) -> T:
+    def one_of(self, parsers: list[Callable[[], T]], description: str) -> T:
         for parser in parsers:
             index = self.index
             try:
@@ -315,7 +313,7 @@ def parse_left(line: Line) -> str:
         return parse_str(line)
 
 
-def parse_right(line: Line) -> Union[str, Ignore]:
+def parse_right(line: Line) -> str | Ignore:
     c = line.peek()
     if c in QUOTATION_MARKS:
         return parse_quoted_str(line)
@@ -327,21 +325,27 @@ def parse_right(line: Line) -> Union[str, Ignore]:
 
 
 def parse_arrow_name(line: Line) -> str:
-    return line.one_of([
-        lambda: line.expect("exact-re"),
-        lambda: line.expect("exact"),
-        lambda: line.expect("name-re"),
-        lambda: line.expect("name"),
-        lambda: line.expect("re"),
-        lambda: line.expect(""),
-    ], "Expected arrow name")
+    return line.one_of(
+        [
+            lambda: line.expect("exact-re"),
+            lambda: line.expect("exact"),
+            lambda: line.expect("name-re"),
+            lambda: line.expect("name"),
+            lambda: line.expect("re"),
+            lambda: line.expect(""),
+        ],
+        "Expected arrow name",
+    )
 
 
 def parse_arrow_head(line: Line) -> ArrowHead:
-    return line.one_of([
-        lambda: line.expect_with(">>", ArrowHead.SEQUENCE),
-        lambda: line.expect_with(">", ArrowHead.NORMAL),
-    ], "Expected arrow head")
+    return line.one_of(
+        [
+            lambda: line.expect_with(">>", ArrowHead.SEQUENCE),
+            lambda: line.expect_with(">", ArrowHead.NORMAL),
+        ],
+        "Expected arrow head",
+    )
 
 
 def parse_eol(line: Line) -> None:
@@ -413,12 +417,12 @@ class Transformer:
 
     def transform(self, path: PurePath) -> Optional[PurePath]:
         for i, (line, tf) in enumerate(self._tfs):
-            log.explain(f"Testing rule {i+1}: {line}")
+            log.explain(f"Testing rule {i + 1}: {line}")
 
             try:
                 result = tf.transform(path)
             except Exception as e:
-                log.warn(f"Error while testing rule {i+1}: {line}")
+                log.warn(f"Error while testing rule {i + 1}: {line}")
                 log.warn_contd(str(e))
                 continue
 

PFERD/utils.py

@@ -3,10 +3,11 @@ import getpass
 import sys
 import threading
 from abc import ABC, abstractmethod
+from collections.abc import Callable
 from contextlib import AsyncExitStack
 from pathlib import Path, PurePath
 from types import TracebackType
-from typing import Any, Callable, Dict, Generic, Optional, Type, TypeVar
+from typing import Any, Generic, Optional, TypeVar
 from urllib.parse import parse_qs, urlencode, urlsplit, urlunsplit
 
 import bs4
@@ -79,7 +80,7 @@ def url_set_query_param(url: str, param: str, value: str) -> str:
     return urlunsplit((scheme, netloc, path, new_query_string, fragment))
 
 
-def url_set_query_params(url: str, params: Dict[str, str]) -> str:
+def url_set_query_params(url: str, params: dict[str, str]) -> str:
     """
     Sets multiple query parameters in an url, overwriting existing ones.
     """
@@ -131,10 +132,10 @@ class ReusableAsyncContextManager(ABC, Generic[T]):
         return result
 
     async def __aexit__(
-            self,
-            exc_type: Optional[Type[BaseException]],
-            exc_value: Optional[BaseException],
-            traceback: Optional[TracebackType],
+        self,
+        exc_type: Optional[type[BaseException]],
+        exc_value: Optional[BaseException],
+        traceback: Optional[TracebackType],
     ) -> Optional[bool]:
         if not self._active:
             raise RuntimeError("__aexit__ called too many times")

pyproject.toml

@@ -20,16 +20,29 @@ pferd = "PFERD.__main__:main"
 [tool.setuptools.dynamic]
 version = {attr = "PFERD.version.VERSION"}
 
-[tool.flake8]
-max-line-length = 110
+[tool.ruff]
+line-length = 110
 
-[tool.isort]
-line_length = 110
-
-[tool.autopep8]
-max_line_length = 110
-in-place = true
-recursive = true
+[tool.ruff.lint]
+select = [
+    # pycodestyle
+    "E",
+    # Pyflakes
+    "F",
+    # pyupgrade
+    "UP",
+    # flake8-bugbear
+    "B",
+    # flake8-simplify
+    "SIM",
+    # isort
+    "I",
+]
+ignore = [
+  "UP045",
+  "SIM114",
+  "B023"
+]
 
 [tool.mypy]
 disallow_any_generics = true
@@ -40,3 +53,10 @@ warn_unused_ignores = true
 warn_unreachable = true
 show_error_context = true
 ignore_missing_imports = true
+
+[dependency-groups]
+dev = [
+    "mypy>=1.18.2",
+    "pyinstaller>=6.16.0",
+    "ruff>=0.14.1",
+]

scripts/build

@@ -2,4 +2,4 @@
 
 set -e
 
-pyinstaller --onefile pferd.py
+uv run pyinstaller --onefile pferd.py

scripts/check

@@ -2,5 +2,5 @@
 
 set -e
 
-mypy .
-flake8 PFERD
+uv run mypy .
+uv run ruff check

scripts/format

@@ -2,5 +2,4 @@
 
 set -e
 
-autopep8 .
-isort .
+uv run ruff format