76 lines
2.6 KiB
Python
76 lines
2.6 KiB
Python
# Copyright (c) 2016 Luis Escobar <lescobar@vauxoo.com>
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# Copyright (c) 2016 Claudiu Popa <pcmanticore@gmail.com>
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# 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/master/COPYING
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import linecache
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from pylint import checkers
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from pylint.interfaces import IAstroidChecker, HIGH
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from pylint.checkers.utils import check_messages
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class DocStringStyleChecker(checkers.BaseChecker):
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"""Checks format of docstrings based on PEP 0257"""
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__implements__ = IAstroidChecker
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name = 'docstyle'
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msgs = {
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'C0198': ('Bad docstring quotes in %s, expected """, given %s',
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'bad-docstring-quotes',
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'Used when a docstring does not have triple double quotes.'),
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'C0199': ('First line empty in %s docstring',
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'docstring-first-line-empty',
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'Used when a blank line is found at the beginning of a docstring.'),
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}
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@check_messages('docstring-first-line-empty', 'bad-docstring-quotes')
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def visit_module(self, node):
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self._check_docstring('module', node)
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def visit_classdef(self, node):
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self._check_docstring('class', node)
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def visit_functiondef(self, node):
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ftype = 'method' if node.is_method() else 'function'
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self._check_docstring(ftype, node)
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visit_asyncfunctiondef = visit_functiondef
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def _check_docstring(self, node_type, node):
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docstring = node.doc
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if docstring and docstring[0] == '\n':
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self.add_message('docstring-first-line-empty', node=node,
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args=(node_type,), confidence=HIGH)
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# Use "linecache", instead of node.as_string(), because the latter
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# looses the original form of the docstrings.
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if docstring:
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lineno = node.fromlineno + 1
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line = linecache.getline(node.root().file, lineno).lstrip()
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if line and line.find('"""') == 0:
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return
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if line and '\'\'\'' in line:
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quotes = '\'\'\''
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elif line and line[0] == '"':
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quotes = '"'
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elif line and line[0] == '\'':
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quotes = '\''
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else:
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quotes = False
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if quotes:
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self.add_message('bad-docstring-quotes', node=node,
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args=(node_type, quotes), confidence=HIGH)
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def register(linter):
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"""Required method to auto register this checker.
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:param linter: Main interface object for Pylint plugins
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:type linter: Pylint object
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"""
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linter.register_checker(DocStringStyleChecker(linter))
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