mirror of
https://github.com/thegeeklab/ansible-later.git
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252 lines
8.4 KiB
Python
252 lines
8.4 KiB
Python
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# -*- coding: utf-8 -*-
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import ast
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import inspect
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import sys
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try:
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from flake8.engine import pep8 as stdin_utils
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except ImportError:
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from flake8 import utils as stdin_utils
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WHITE_LIST = [
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'__name__',
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'__doc__',
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'credits',
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'_',
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]
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if sys.version_info >= (3, 0):
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import builtins
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BUILTINS = [
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a[0]
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for a in inspect.getmembers(builtins)
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if a[0] not in WHITE_LIST
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]
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PY3 = True
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else:
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import __builtin__
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BUILTINS = [
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a[0]
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for a in inspect.getmembers(__builtin__)
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if a[0] not in WHITE_LIST
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]
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PY3 = False
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class BuiltinsChecker(object):
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name = 'flake8_builtins'
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version = '1.4.1'
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assign_msg = 'A001 "{0}" is a python builtin and is being shadowed, ' \
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'consider renaming the variable'
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argument_msg = 'A002 "{0}" is used as an argument and thus shadows a ' \
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'python builtin, consider renaming the argument'
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class_attribute_msg = 'A003 "{0}" is a python builtin, consider ' \
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'renaming the class attribute'
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def __init__(self, tree, filename):
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self.tree = tree
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self.filename = filename
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def run(self):
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tree = self.tree
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if self.filename == 'stdin':
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lines = stdin_utils.stdin_get_value()
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tree = ast.parse(lines)
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for statement in ast.walk(tree):
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for child in ast.iter_child_nodes(statement):
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child.__flake8_builtins_parent = statement
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function_nodes = [ast.FunctionDef]
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if getattr(ast, 'AsyncFunctionDef', None):
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function_nodes.append(ast.AsyncFunctionDef)
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function_nodes = tuple(function_nodes)
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for_nodes = [ast.For]
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if getattr(ast, 'AsyncFor', None):
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for_nodes.append(ast.AsyncFor)
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for_nodes = tuple(for_nodes)
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with_nodes = [ast.With]
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if getattr(ast, 'AsyncWith', None):
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with_nodes.append(ast.AsyncWith)
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with_nodes = tuple(with_nodes)
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for statement in ast.walk(tree):
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value = None
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if isinstance(statement, ast.Assign):
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value = self.check_assignment(statement)
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elif isinstance(statement, function_nodes):
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value = self.check_function_definition(statement)
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elif isinstance(statement, for_nodes):
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value = self.check_for_loop(statement)
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elif isinstance(statement, with_nodes):
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value = self.check_with(statement)
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elif isinstance(statement, ast.excepthandler):
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value = self.check_exception(statement)
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elif isinstance(statement, ast.ListComp):
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value = self.check_list_comprehension(statement)
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elif isinstance(statement, (ast.Import, ast.ImportFrom)):
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value = self.check_import(statement)
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elif isinstance(statement, ast.ClassDef):
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value = self.check_class(statement)
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if value:
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for line, offset, msg, rtype in value:
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yield line, offset, msg, rtype
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def check_assignment(self, statement):
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msg = self.assign_msg
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if type(statement.__flake8_builtins_parent) is ast.ClassDef:
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msg = self.class_attribute_msg
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stack = list(statement.targets)
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while stack:
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item = stack.pop()
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if isinstance(item, (ast.Tuple, ast.List)):
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stack.extend(list(item.elts))
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elif isinstance(item, ast.Name) and \
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item.id in BUILTINS:
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yield self.error(item, message=msg, variable=item.id)
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elif PY3 and \
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isinstance(item, ast.Starred) and \
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item.value.id in BUILTINS:
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yield self.error(
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statement,
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message=msg,
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variable=item.value.id,
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)
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def check_function_definition(self, statement):
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if statement.name in BUILTINS:
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msg = self.assign_msg
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if type(statement.__flake8_builtins_parent) is ast.ClassDef:
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msg = self.class_attribute_msg
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yield self.error(statement, message=msg, variable=statement.name)
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if PY3:
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for arg in statement.args.args:
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if isinstance(arg, ast.arg) and \
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arg.arg in BUILTINS:
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yield self.error(
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arg,
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message=self.argument_msg,
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variable=arg.arg,
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)
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else:
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for arg in statement.args.args:
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if isinstance(arg, ast.Name) and \
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arg.id in BUILTINS:
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yield self.error(arg, message=self.argument_msg)
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def check_for_loop(self, statement):
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stack = [statement.target]
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while stack:
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item = stack.pop()
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if isinstance(item, (ast.Tuple, ast.List)):
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stack.extend(list(item.elts))
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elif isinstance(item, ast.Name) and \
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item.id in BUILTINS:
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yield self.error(statement, variable=item.id)
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elif PY3 and \
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isinstance(item, ast.Starred) and \
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item.value.id in BUILTINS:
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yield self.error(statement, variable=item.value.id)
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def check_with(self, statement):
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if not PY3:
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var = statement.optional_vars
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if isinstance(var, (ast.Tuple, ast.List)):
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for element in var.elts:
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if isinstance(element, ast.Name) and \
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element.id in BUILTINS:
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yield self.error(statement, variable=element.id)
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elif isinstance(var, ast.Name) and var.id in BUILTINS:
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yield self.error(statement, variable=var.id)
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else:
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for item in statement.items:
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var = item.optional_vars
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if isinstance(var, (ast.Tuple, ast.List)):
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for element in var.elts:
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if isinstance(element, ast.Name) and \
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element.id in BUILTINS:
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yield self.error(statement, variable=element.id)
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elif isinstance(element, ast.Starred) and \
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element.value.id in BUILTINS:
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yield self.error(
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element,
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variable=element.value.id,
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)
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elif isinstance(var, ast.Name) and var.id in BUILTINS:
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yield self.error(statement, variable=var.id)
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def check_exception(self, statement):
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exception_name = statement.name
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value = ''
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if isinstance(exception_name, ast.Name):
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value = exception_name.id
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elif isinstance(exception_name, str): # Python +3.x
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value = exception_name
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if value in BUILTINS:
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yield self.error(statement, variable=value)
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def check_list_comprehension(self, statement):
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for generator in statement.generators:
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if isinstance(generator.target, ast.Name) \
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and generator.target.id in BUILTINS:
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yield self.error(statement, variable=generator.target.id)
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elif isinstance(generator.target, (ast.Tuple, ast.List)):
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for tuple_element in generator.target.elts:
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if isinstance(tuple_element, ast.Name) and \
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tuple_element.id in BUILTINS:
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yield self.error(statement, variable=tuple_element.id)
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def check_import(self, statement):
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for name in statement.names:
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if name.asname in BUILTINS:
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yield self.error(statement, variable=name.asname)
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def check_class(self, statement):
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if statement.name in BUILTINS:
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yield self.error(statement, variable=statement.name)
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def error(
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self,
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statement,
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message=None,
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variable=None,
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line=None,
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column=None,
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):
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if not message:
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message = self.assign_msg
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if not variable:
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variable = statement.id
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if not line:
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line = statement.lineno
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if not column:
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column = statement.col_offset
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return (
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line,
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column,
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message.format(variable),
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type(self),
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)
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