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