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try:
from logilab import astng as ast
from pylint.interfaces import IASTNGChecker as IChecker
PYLINT = 0 # pylint 0.something
except ImportError:
import astroid as ast
from pylint.interfaces import IAstroidChecker as IChecker
PYLINT = 1 # pylint 1.something
from pylint.checkers import BaseChecker
from pylint.checkers.utils import safe_infer
if PYLINT == 0:
# this is not quite correct; later versions of pylint 0.* wanted a
# three-tuple for messages as well
msg = ('Exception raised without arguments',
'Used when an exception is raised without any arguments')
else:
msg = ('Exception raised without arguments',
'exception-without-args',
'Used when an exception is raised without any arguments')
msgs = {'R9901': msg}
class ExceptionMessageChecker(BaseChecker):
__implements__ = IChecker
name = 'Exception Messages'
options = (
('exceptions-without-args',
dict(default=('NotImplementedError',),
type='csv',
metavar='<exception names>',
help='List of exception names that may be raised without arguments')),)
# this is important so that your checker is executed before others
priority = -1
def visit_raise(self, node):
if node.exc is None:
return
if isinstance(node.exc, ast.Name):
raised = safe_infer(node.exc)
if (isinstance(raised, ast.Class) and
raised.name not in self.config.exceptions_without_args):
self.add_message('R9901', node=node.exc)
def register(linter):
"""required method to auto register this checker"""
linter.register_checker(ExceptionMessageChecker(linter))
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