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- # Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
- # For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
- import sys
- from typing import TYPE_CHECKING, List, Optional, Tuple
- from astroid import nodes
- from pylint.constants import _SCOPE_EXEMPT, MSG_TYPES, WarningScope
- from pylint.exceptions import InvalidMessageError
- from pylint.utils import normalize_text
- if TYPE_CHECKING:
- from pylint.checkers import BaseChecker
- class MessageDefinition:
- def __init__(
- self,
- checker: "BaseChecker",
- msgid: str,
- msg: str,
- description: str,
- symbol: str,
- scope: str,
- minversion: Optional[Tuple[int, int]] = None,
- maxversion: Optional[Tuple[int, int]] = None,
- old_names: Optional[List[Tuple[str, str]]] = None,
- ) -> None:
- self.checker_name = checker.name
- self.check_msgid(msgid)
- self.msgid = msgid
- self.symbol = symbol
- self.msg = msg
- self.description = description
- self.scope = scope
- self.minversion = minversion
- self.maxversion = maxversion
- self.old_names: List[Tuple[str, str]] = []
- if old_names:
- for old_msgid, old_symbol in old_names:
- self.check_msgid(old_msgid)
- self.old_names.append(
- (old_msgid, old_symbol),
- )
- @staticmethod
- def check_msgid(msgid: str) -> None:
- if len(msgid) != 5:
- raise InvalidMessageError(f"Invalid message id {msgid!r}")
- if msgid[0] not in MSG_TYPES:
- raise InvalidMessageError(f"Bad message type {msgid[0]} in {msgid!r}")
- def __repr__(self) -> str:
- return f"MessageDefinition:{self.symbol} ({self.msgid})"
- def __str__(self) -> str:
- return f"{repr(self)}:\n{self.msg} {self.description}"
- def may_be_emitted(self) -> bool:
- """return True if message may be emitted using the current interpreter"""
- if self.minversion is not None and self.minversion > sys.version_info:
- return False
- if self.maxversion is not None and self.maxversion <= sys.version_info:
- return False
- return True
- def format_help(self, checkerref: bool = False) -> str:
- """return the help string for the given message id"""
- desc = self.description
- if checkerref:
- desc += f" This message belongs to the {self.checker_name} checker."
- title = self.msg
- if self.minversion or self.maxversion:
- restr = []
- if self.minversion:
- restr.append(f"< {'.'.join(str(n) for n in self.minversion)}")
- if self.maxversion:
- restr.append(f">= {'.'.join(str(n) for n in self.maxversion)}")
- restriction = " or ".join(restr)
- if checkerref:
- desc += f" It can't be emitted when using Python {restriction}."
- else:
- desc += (
- f" This message can't be emitted when using Python {restriction}."
- )
- msg_help = normalize_text(" ".join(desc.split()), indent=" ")
- message_id = f"{self.symbol} ({self.msgid})"
- if title != "%s":
- title = title.splitlines()[0]
- return f":{message_id}: *{title.rstrip(' ')}*\n{msg_help}"
- return f":{message_id}:\n{msg_help}"
- def check_message_definition(
- self, line: Optional[int], node: Optional[nodes.NodeNG]
- ) -> None:
- """Check MessageDefinition for possible errors"""
- if self.msgid[0] not in _SCOPE_EXEMPT:
- # Fatal messages and reports are special, the node/scope distinction
- # does not apply to them.
- if self.scope == WarningScope.LINE:
- if line is None:
- raise InvalidMessageError(
- f"Message {self.msgid} must provide line, got None"
- )
- if node is not None:
- raise InvalidMessageError(
- f"Message {self.msgid} must only provide line, "
- f"got line={line}, node={node}"
- )
- elif self.scope == WarningScope.NODE:
- # Node-based warnings may provide an override line.
- if node is None:
- raise InvalidMessageError(
- f"Message {self.msgid} must provide Node, got None"
- )
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