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https://github.com/trezor/trezor-firmware.git
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43677c6afd
The static replacer doesn't understand tuples (it's just a dumb sed, we'd need to teach it the python ast which is a somewhat bigger project that would also make the build slower) so instead we spell out every "utils.INTERNAL_MODEL == xyz" equality check separately. If you don't, you don't get static replacement and you're checking at run-time in every firmware for every device. This pylint will catch the problem.
74 lines
2.5 KiB
Python
74 lines
2.5 KiB
Python
from astroid import nodes
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from pylint.checkers import BaseChecker
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from pylint.checkers.utils import check_messages
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from pylint.interfaces import IAstroidChecker
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class AsyncAwaitableChecker(BaseChecker):
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__implements__ = IAstroidChecker
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name = "async-awaitable-checker"
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priority = -1
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msgs = {
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"W9999": (
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'Async function "%s" is likely not meant to return an Awaitable.',
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"async-awaitable-return",
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"Used when an async function returns an Awaitable instead of the result.",
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),
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}
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@check_messages("async-awaitable-return")
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def visit_asyncfunctiondef(self, node: nodes.AsyncFunctionDef):
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# Check if the return type is explicitly an Awaitable
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if node.returns and "Awaitable" in node.returns.as_string():
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self.add_message("async-awaitable-return", node=node, args=(node.name,))
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class InternalModelComparisonChecker(BaseChecker):
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"""Check that utils.INTERNAL_MODEL is only compared using '==' or '!='.
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This is because the static replacer does not support 'in' or 'not in' comparisons,
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so the comparison is compiled into all models and performed at runtime. This is
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typically not what you want.
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When multiple comparisons are necessary, you may need to silence another
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pylint warning: # pylint: disable=consider-using-in
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"""
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__implements__ = IAstroidChecker
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name = "internal-model-comparison-checker"
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priority = -1
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msgs = {
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"W9998": (
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"Only compare INTERNAL_MODEL using '==' or '!='.",
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"internal-model-tuple-comparison",
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"Used when utils.INTERNAL_MODEL is compared using 'in' or 'not in' with a tuple.",
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),
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}
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@staticmethod
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def _is_internal_model(node):
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return (
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isinstance(node, nodes.Attribute)
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and node.attrname == "INTERNAL_MODEL"
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and isinstance(node.expr, nodes.Name)
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and node.expr.name == "utils"
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)
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@check_messages("internal-model-tuple-comparison")
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def visit_compare(self, node: nodes.Compare):
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if not self._is_internal_model(node.left):
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return
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if len(node.ops) != 1:
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return
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op, _right = node.ops[0]
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if op in ("in", "not in"):
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self.add_message("internal-model-tuple-comparison", node=node)
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def register(linter):
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"""Required method to auto register this checker."""
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linter.register_checker(AsyncAwaitableChecker(linter))
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linter.register_checker(InternalModelComparisonChecker(linter))
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