Address pylint missing-function-docstring

.pylintrc

@@ -19,7 +19,6 @@ disable =
     dangerous-default-value,
     duplicate-code,
     fixme,
-    missing-function-docstring,
     no-member,
     not-callable,
     protected-access,

src/ansiblelint/formatters/__init__.py

@@ -50,6 +50,7 @@ def _format_path(self, path: Union[str, Path]) -> str:
 
     # pylint: disable=no-self-use
     def format(self, match: "MatchError") -> str:
+        """Format a match error."""
         return str(match)
 
     @staticmethod
@@ -154,6 +155,7 @@ class CodeclimateJSONFormatter(BaseFormatter[Any]):
     """
 
     def format_result(self, matches: List["MatchError"]) -> str:
+        """Format a list of match errors as a JSON string."""
 
         if not isinstance(matches, list):
             raise RuntimeError(

src/ansiblelint/rules/__init__.py

@@ -44,6 +44,7 @@ class AnsibleLintRule(BaseRule):
 
     @property
     def rule_config(self) -> Dict[str, Any]:
+        """Retrieve rule specific configuration."""
         return get_rule_config(self.id)
 
     @lru_cache()
@@ -57,6 +58,7 @@ def __repr__(self) -> str:
 
     @staticmethod
     def unjinja(text: str) -> str:
+        """Remove jinja2 bits from a string."""
         text = re.sub(r"{{.+?}}", "JINJA_EXPRESSION", text)
         text = re.sub(r"{%.+?%}", "JINJA_STATEMENT", text)
         text = re.sub(r"{#.+?#}", "JINJA_COMMENT", text)
@@ -71,6 +73,7 @@ def create_matcherror(
         filename: Optional[Union[str, Lintable]] = None,
         tag: str = "",
     ) -> MatchError:
+        """Instantiate a new MatchError."""
         match = MatchError(
             message=message,
             linenumber=linenumber,
@@ -251,6 +254,7 @@ def __init__(
         self.rules = sorted(self.rules)
 
     def register(self, obj: AnsibleLintRule) -> None:
+        """Register a rule."""
         # We skip opt-in rules which were not manually enabled
         if "opt-in" not in obj.tags or obj.id in self.options.enable_list:
             self.rules.append(obj)
@@ -264,11 +268,13 @@ def __len__(self) -> int:
         return len(self.rules)
 
     def extend(self, more: List[AnsibleLintRule]) -> None:
+        """Combine rules."""
         self.rules.extend(more)
 
     def run(
         self, file: Lintable, tags: Set[str] = set(), skip_list: List[str] = []
     ) -> List[MatchError]:
+        """Run all the rules against the given lintable."""
         matches: List[MatchError] = []
 
         if not file.path.is_dir():
@@ -309,6 +315,7 @@ def __repr__(self) -> str:
         )
 
     def listtags(self) -> str:
+        """Return a string with all the tags in the RulesCollection."""
         tag_desc = {
             "command-shell": "Specific to use of command and shell modules",
             "core": "Related to internal implementation of the linter",

src/ansiblelint/rules/risky_octal.py

@@ -56,13 +56,15 @@ class OctalPermissionsRule(AnsibleLintRule):
 
     @staticmethod
     def is_invalid_permission(mode: int) -> bool:
-        # sensible file permission modes don't
-        # have write bit set when read bit is
-        # not set and don't have execute bit set
-        # when user execute bit is not set.
-        # also, user permissions are more generous than
-        # group permissions and user and group permissions
-        # are more generous than world permissions
+        """Check if permissions are valid.
+
+        Sensible file permission modes don't have write bit set when read bit
+        is not set and don't have execute bit set when user execute bit is
+        not set.
+
+        Also, user permissions are more generous than group permissions and
+        user and group permissions are more generous than world permissions
+        """
 
         other_write_without_read = (
             mode % 8 and mode % 8 < 4 and not (mode % 8 == 1 and (mode >> 6) % 2 == 1)