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67 lines
1.9 KiB
Python
67 lines
1.9 KiB
Python
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
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# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt
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from __future__ import annotations
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from typing import TYPE_CHECKING
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from astroid import nodes
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from pylint.checkers import BaseRawFileChecker
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if TYPE_CHECKING:
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from pylint.lint import PyLinter
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def is_line_commented(line: bytes) -> bool:
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"""Checks if a `# symbol that is not part of a string was found in line."""
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comment_idx = line.find(b"#")
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if comment_idx == -1:
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return False
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if comment_part_of_string(line, comment_idx):
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return is_line_commented(line[:comment_idx] + line[comment_idx + 1 :])
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return True
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def comment_part_of_string(line: bytes, comment_idx: int) -> bool:
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"""Checks if the symbol at comment_idx is part of a string."""
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if (
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line[:comment_idx].count(b"'") % 2 == 1
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and line[comment_idx:].count(b"'") % 2 == 1
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) or (
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line[:comment_idx].count(b'"') % 2 == 1
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and line[comment_idx:].count(b'"') % 2 == 1
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):
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return True
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return False
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class CommentChecker(BaseRawFileChecker):
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name = "empty-comment"
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msgs = {
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"R2044": (
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"Line with empty comment",
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"empty-comment",
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(
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"Used when a # symbol appears on a line not followed by an actual comment"
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),
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)
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}
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options = ()
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def process_module(self, node: nodes.Module) -> None:
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with node.stream() as stream:
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for (line_num, line) in enumerate(stream):
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line = line.rstrip()
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if line.endswith(b"#"):
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if not is_line_commented(line[:-1]):
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self.add_message("empty-comment", line=line_num + 1)
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def register(linter: PyLinter) -> None:
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linter.register_checker(CommentChecker(linter))
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