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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/master/LICENSE
import collections
from astroid import nodes
from pylint.constants import MSG_STATE_SCOPE_MODULE, WarningScope
class FileState:
"""Hold internal state specific to the currently analyzed file"""
def __init__(self, modname=None):
self.base_name = modname
self._module_msgs_state = {}
self._raw_module_msgs_state = {}
self._ignored_msgs = collections.defaultdict(set)
self._suppression_mapping = {}
self._effective_max_line_number = None
def collect_block_lines(self, msgs_store, module_node):
"""Walk the AST to collect block level options line numbers."""
for msg, lines in self._module_msgs_state.items():
self._raw_module_msgs_state[msg] = lines.copy()
orig_state = self._module_msgs_state.copy()
self._module_msgs_state = {}
self._suppression_mapping = {}
self._effective_max_line_number = module_node.tolineno
self._collect_block_lines(msgs_store, module_node, orig_state)
def _collect_block_lines(self, msgs_store, node, msg_state):
"""Recursively walk (depth first) AST to collect block level options
line numbers.
"""
for child in node.get_children():
self._collect_block_lines(msgs_store, child, msg_state)
first = node.fromlineno
last = node.tolineno
# first child line number used to distinguish between disable
# which are the first child of scoped node with those defined later.
# For instance in the code below:
#
# 1. def meth8(self):
# 2. """test late disabling"""
# 3. pylint: disable=not-callable
# 4. print(self.blip)
# 5. pylint: disable=no-member
# 6. print(self.bla)
#
# E1102 should be disabled from line 1 to 6 while E1101 from line 5 to 6
#
# this is necessary to disable locally messages applying to class /
# function using their fromlineno
if (
isinstance(node, (nodes.Module, nodes.ClassDef, nodes.FunctionDef))
and node.body
):
firstchildlineno = node.body[0].fromlineno
else:
firstchildlineno = last
for msgid, lines in msg_state.items():
for lineno, state in list(lines.items()):
original_lineno = lineno
if first > lineno or last < lineno:
continue
# Set state for all lines for this block, if the
# warning is applied to nodes.
message_definitions = msgs_store.get_message_definitions(msgid)
for message_definition in message_definitions:
if message_definition.scope == WarningScope.NODE:
if lineno > firstchildlineno:
state = True
first_, last_ = node.block_range(lineno)
else:
first_ = lineno
last_ = last
for line in range(first_, last_ + 1):
# do not override existing entries
if line in self._module_msgs_state.get(msgid, ()):
continue
if line in lines: # state change in the same block
state = lines[line]
original_lineno = line
if not state:
self._suppression_mapping[(msgid, line)] = original_lineno
try:
self._module_msgs_state[msgid][line] = state
except KeyError:
self._module_msgs_state[msgid] = {line: state}
del lines[lineno]
def set_msg_status(self, msg, line, status):
"""Set status (enabled/disable) for a given message at a given line"""
assert line > 0
try:
self._module_msgs_state[msg.msgid][line] = status
except KeyError:
self._module_msgs_state[msg.msgid] = {line: status}
def handle_ignored_message(
self, state_scope, msgid, line, node, args, confidence
): # pylint: disable=unused-argument
"""Report an ignored message.
state_scope is either MSG_STATE_SCOPE_MODULE or MSG_STATE_SCOPE_CONFIG,
depending on whether the message was disabled locally in the module,
or globally. The other arguments are the same as for add_message.
"""
if state_scope == MSG_STATE_SCOPE_MODULE:
try:
orig_line = self._suppression_mapping[(msgid, line)]
self._ignored_msgs[(msgid, orig_line)].add(line)
except KeyError:
pass
def iter_spurious_suppression_messages(self, msgs_store):
for warning, lines in self._raw_module_msgs_state.items():
for line, enable in lines.items():
if not enable and (warning, line) not in self._ignored_msgs:
# ignore cyclic-import check which can show false positives
# here due to incomplete context
if warning != "R0401":
yield "useless-suppression", line, (
msgs_store.get_msg_display_string(warning),
)
# don't use iteritems here, _ignored_msgs may be modified by add_message
for (warning, from_), lines in list(self._ignored_msgs.items()):
for line in lines:
yield "suppressed-message", line, (
msgs_store.get_msg_display_string(warning),
from_,
)
def get_effective_max_line_number(self):
return self._effective_max_line_number
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