Enable flake8-return linting rules (#267)

See https://docs.astral.sh/ruff/rules/#flake8-raise-rse.

.ruff.toml

@@ -17,6 +17,7 @@ select = [
   "N", # pep8-naming
   "PIE", # flake8-pie
   "PGH", # pygrep-hooks
+  "RET", # flake8-return
   "RUF100", # unused noqa (yesqa)
   "T10", # flake8-debugger
   "UP", # pyupgrade

src/common/dates.py

@@ -45,8 +45,7 @@ def parse_datetime(text: str, formats: list[str] = frozenset([
     for fmt in formats:
         try:
             date = datetime.strptime(text, fmt)  # NOQA: DTZ007, timezone is handled below
-            date = date.astimezone(timezone.utc) if to_utc else date
-            return date
+            return date.astimezone(timezone.utc) if to_utc else date
         except ValueError:
             pass
 

src/common/endoflife.py

@@ -30,11 +30,12 @@ class AutoConfig:
         regexes = regexes if isinstance(regexes, list) else [regexes]
         self.version_patterns = [re.compile(regex) for regex in regexes]
 
-    def first_match(self, version: str) -> re.Match:
+    def first_match(self, version: str) -> re.Match | None:
         for pattern in self.version_patterns:
             match = pattern.match(version)
             if match:
                 return match
+        return None
 
     def render(self, match: re.Match) -> str:
         return self.version_template.render(**match.groupdict())
@@ -65,10 +66,11 @@ class ProductFrontmatter:
 
         return configs
 
-    def get_release_date(self, release_cycle: str) -> datetime:
+    def get_release_date(self, release_cycle: str) -> datetime | None:
         for release in self.data["releases"]:
             if release["releaseCycle"] == release_cycle:
                 return release["releaseDate"]
+        return None
 
 
 class Product:

src/common/http.py

@@ -32,10 +32,10 @@ def fetch_urls(urls: list[str], data: any = None, headers: dict[str, str] = None
         if next_max_retries == 0:
             logging.error(f"Got ChunkedEncodingError while fetching {urls} ({e}), giving up")
             raise e  # So that the function does not get stuck in an infinite loop.
-        else:
-            # We could wait a bit before retrying, but it's not clear if it would help.
-            logging.warning(f"Got ChunkedEncodingError while fetching {urls} ({e}), retrying (remaining retries = {next_max_retries}).")
-            return fetch_urls(urls, data, headers, next_max_retries, backoff_factor, timeout)
+
+        # We could wait a bit before retrying, but it's not clear if it would help.
+        logging.warning(f"Got ChunkedEncodingError while fetching {urls} ({e}), retrying (remaining retries = {next_max_retries}).")
+        return fetch_urls(urls, data, headers, next_max_retries, backoff_factor, timeout)
 
 
 def fetch_url(url: str, data: any = None, headers: dict[str, str] = None,