Support exclusions in auto configurations (#282)

Support a new regex_exclude option to describe versions that must be excluded from the list of retrieved versions.

This will be useful for products such as KDE Plasma, for which beta releases are designated by the use of minor or patch version >= 80.

src/common/endoflife.py

@@ -25,15 +25,24 @@ class AutoConfig:
         self.url = config[method]
         self.version_template = Template(config.get("template", DEFAULT_VERSION_TEMPLATE))
 
-        regexes = config.get("regex", DEFAULT_VERSION_REGEX)
-        regexes = regexes if isinstance(regexes, list) else [regexes]
-        self.version_patterns = [re.compile(regex) for regex in regexes]
+        regexes_include = config.get("regex", DEFAULT_VERSION_REGEX)
+        regexes_include = regexes_include if isinstance(regexes_include, list) else [regexes_include]
+        self.include_version_patterns = [re.compile(r) for r in regexes_include]
+
+        regexes_exclude = config.get("regex_exclude", [])
+        regexes_exclude = regexes_exclude if isinstance(regexes_exclude, list) else [regexes_exclude]
+        self.exclude_version_patterns = [re.compile(r) for r in regexes_exclude]
 
     def first_match(self, version: str) -> re.Match | None:
-        for pattern in self.version_patterns:
-            match = pattern.match(version)
+        for exclude_pattern in self.exclude_version_patterns:
+            if exclude_pattern.match(version):
+                return None
+
+        for include_pattern in self.include_version_patterns:
+            match = include_pattern.match(version)
             if match:
                 return match
+
         return None
 
     def render(self, match: re.Match) -> str: