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GeezerVison is showing github.com — RustPython/scripts/update_lib/patch_spec.py at main · RustPython/RustPython Expand file tree/ Copy pathpatch_spec.pyMore file actions 771 lines (658 loc) · 26.5 KB / Copy pathpatch_spec.pyFile metadata and controls771 lines (658 loc) · 26.5 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 """ Low-level module for converting between test files and JSON patches. This module handles: - Extracting patches from test files (file -> JSON) - Applying patches to test files (JSON -> file) """ from __future__ import annotations import ast import collections import contextlib import doctest import enum import re import textwrap import typing from pathlib import Path if typing.TYPE_CHECKING: from collections.abc import Iterator type Patches = dict[str, dict[str, list["PatchSpec"]]] DEFAULT_INDENT = " " * 4 COMMENT = "TODO: RUSTPYTHON" UT = "unittest" @enum.unique class UtMethod(enum.StrEnum): """ UnitTest Method. """ def _generate_next_value_(name, start, count, last_values) -> str: return name[0].lower() + name[1:] def has_args(self) -> bool: return self not in (self.ExpectedFailure, self.ExpectedSuccess) def has_cond(self) -> bool: return self.endswith(("If", "Unless")) ExpectedFailure = enum.auto() ExpectedFailureIf = enum.auto() ExpectedFailureIfWindows = enum.auto() ExpectedSuccess = enum.auto() Skip = enum.auto() SkipIf = enum.auto() SkipUnless = enum.auto() class PatchSpec(typing.NamedTuple): """ Attributes ---------- ut_method : UtMethod unittest method. cond : str, optional `ut_method` condition. Relevant only for some of `ut_method` types. reason : str, optional Reason for why the test is patched in this way. """ ut_method: UtMethod cond: str | None = None reason: str = "" @property def _reason(self) -> str: return f"{COMMENT}; {self.reason}".strip(" ;") @property def _attr_node(self) -> ast.Attribute: return ast.Attribute(value=ast.Name(id=UT), attr=self.ut_method) def as_ast_node(self) -> ast.Attribute | ast.Call: if not self.ut_method.has_args(): return self._attr_node args = [] if self.cond: args.append(ast.parse(self.cond).body[0].value) args.append(ast.Constant(value=self._reason)) return ast.Call(func=self._attr_node, args=args, keywords=[]) def as_decorator(self) -> str: unparsed = ast.unparse(self.as_ast_node()) # ast.unparse uses single quotes; convert to double quotes for ruff compatibility unparsed = _single_to_double_quotes(unparsed) if not self.ut_method.has_args(): unparsed = f"{unparsed} # {self._reason}" return f"@{unparsed}" @classmethod def try_from_ast_node( cls, node: ast.Attribute | ast.Call, lines: list[str] ) -> typing.Self | None: if isinstance(node, ast.Attribute): attr_node = node elif isinstance(node, ast.Call): attr_node = node.func else: return if ( isinstance(attr_node, ast.Name) or getattr(attr_node.value, "id", None) != UT ): return cond = None try: ut_method = UtMethod(attr_node.attr) except ValueError: return # If our ut_method has args then, # we need to search for a constant that contains our `COMMENT`. # Otherwise we need to search it in the raw source code :/ if ut_method.has_args() and not ( ut_method is UtMethod.Skip and isinstance(node, ast.Attribute) ): reason = next( ( inner_node.value for inner_node in ast.walk(node) if isinstance(inner_node, ast.Constant) and isinstance(inner_node.value, str) and COMMENT in inner_node.value ), None, ) # If we didn't find a constant containing <COMMENT>, # then we didn't put this decorator if not reason: return if ut_method.has_cond(): cond = ast.unparse(node.args[0]) else: pattern = re.compile(rf"{COMMENT}.?(.*)") dec_lineno = node.lineno curr_line = lines[dec_lineno - 1] prev_line = lines[dec_lineno - 2] # If we see our comment at the decorator line, take it if found := pattern.search(curr_line): reason = found.group() elif prev_line.strip().startswith("#") and ( found := pattern.search(prev_line) ): # Search the previous line of the decorator, # only take the comment if the line starts with a `#` reason = found.group() else: # Didn't find our `COMMENT`, so the patch isn't ours :) return reason = reason.removeprefix(COMMENT).strip(";:, ") return cls(ut_method, cond, reason) class PatchEntryVisitor(ast.NodeVisitor): def __init__(self, lines: list[str]): self.current_class = None self.patches = [] self.lines = lines def patches_from_node( self, node: ast.FunctionDef | ast.AsyncFunctionDef ) -> Iterator[PatchEntry]: for dec_node in node.decorator_list: spec = PatchSpec.try_from_ast_node(dec_node, self.lines) if spec is None: continue yield PatchEntry(self.current_class, node.name, spec) def visit_AsyncFunctionDef(self, node: ast.AsyncFunctionDef): self.patches.extend(self.patches_from_node(node)) # TODO: Support nested classes/methods # self.generic_visit(node) def visit_FunctionDef(self, node: ast.FunctionDef): self.patches.extend(self.patches_from_node(node)) # TODO: Support nested classes/methods # self.generic_visit(node) def visit_ClassDef(self, node: ast.ClassDef): with temp_attr(self, "current_class", node.name): for patch in self.patches_from_node(node): patch = patch._replace(test_name="__self__") self.patches.append(patch) # Keep conditional methods in this namespace, but do not enter # nested classes or the bodies of methods. for item in _iter_class_methods(node): self.visit(item) class PatchEntry(typing.NamedTuple): """ Stores patch metadata. Attributes ---------- parent_class : str Parent class of test. test_name : str Test name. spec : PatchSpec Patch spec. """ parent_class: str test_name: str spec: PatchSpec @classmethod def iter_patch_entries( cls, tree: ast.Module, lines: list[str] ) -> "Iterator[typing.Self]": visitor = PatchEntryVisitor(lines) visitor.visit(tree) yield from visitor.patches def _iter_module_classes(node: ast.AST) -> "Iterator[ast.ClassDef]": """Find module-scope classes, including conditional definitions. Function-local and class-nested definitions have different namespaces and cannot be addressed by the patch format's unqualified class names. """ for child in ast.iter_child_nodes(node): if isinstance(child, ast.ClassDef): yield child elif not isinstance(child, (ast.FunctionDef, ast.AsyncFunctionDef, ast.Lambda)): yield from _iter_module_classes(child) def _iter_class_methods( node: ast.AST, ) -> "Iterator[ast.FunctionDef | ast.AsyncFunctionDef]": for child in ast.iter_child_nodes(node): if isinstance(child, (ast.FunctionDef, ast.AsyncFunctionDef)): yield child elif not isinstance(child, (ast.ClassDef, ast.Lambda)): yield from _iter_class_methods(child) def iter_tests( tree: ast.Module, ) -> "Iterator[tuple[ast.ClassDef, ast.FunctionDef | ast.AsyncFunctionDef]]": for cls_node in _iter_module_classes(tree): for fn_node in _iter_class_methods(cls_node): yield (cls_node, fn_node) def iter_patches(contents: str) -> "Iterator[PatchEntry]": lines = contents.splitlines() tree = ast.parse(contents) yield from PatchEntry.iter_patch_entries(tree, lines) def build_patch_dict(it: "Iterator[PatchEntry]") -> Patches: patches = collections.defaultdict(lambda: collections.defaultdict(list)) for entry in it: patches[entry.parent_class][entry.test_name].append(entry.spec) return {k: dict(v) for k, v in patches.items()} def extract_patches(contents: str) -> Patches: """Extract patches from file contents and return as dict.""" return build_patch_dict(iter_patches(contents)) def modification_from_node_specs(node, specs): lineno = min( (dec_node.lineno for dec_node in node.decorator_list), default=node.lineno ) indent = " " * node.col_offset patch_lines = "\n".join(spec.as_decorator() for spec in specs) return (lineno - 1, textwrap.indent(patch_lines, indent)) def _iter_patch_lines( tree: ast.Module, patches: Patches ) -> "Iterator[tuple[int, str]]": import sys # Build cache of all classes (for Phase 2 to find classes without methods) cache = {} # Build per-class set of async method names (for Phase 2 to generate correct override) async_methods: dict[str, set[str]] = {} # Track class bases for inherited async method lookup class_bases: dict[str, list[str]] = {} all_classes = set() all_class_nodes = list(_iter_module_classes(tree)) # Only names used to place a patch (including inherited methods) need a # unique definition. Conditional, unpatched helpers are common upstream. relevant_classes = set(patches) while True: ancestors = { base.id for node in all_class_nodes if node.name in relevant_classes for base in node.bases if isinstance(base, ast.Name) } expanded = relevant_classes | ancestors if expanded == relevant_classes: break relevant_classes = expanded for node in all_class_nodes: if node.name in all_classes and node.name in relevant_classes: raise ValueError(f"Ambiguous module-scope class name: {node.name}") all_classes.add(node.name) method_counts = collections.Counter( item.name for item in _iter_class_methods(node) ) for method in patches.get(node.name, {}): if method_counts[method] > 1: raise ValueError(f"Ambiguous method name: {node.name}.{method}") for node in all_class_nodes: if isinstance(node, ast.ClassDef): cache[node.name] = (node.end_lineno, node.col_offset + len(DEFAULT_INDENT)) class_bases[node.name] = [ base.id for base in node.bases if isinstance(base, ast.Name) and base.id in all_classes ] cls_async: set[str] = set() for item in _iter_class_methods(node): if isinstance(item, ast.AsyncFunctionDef): cls_async.add(item.name) if cls_async: async_methods[node.name] = cls_async # Phase 1: Iterate and mark existing tests for cls_node, fn_node in iter_tests(tree): specs = patches.get(cls_node.name, {}).pop(fn_node.name, None) if not specs: continue yield modification_from_node_specs(fn_node, specs) # Phase 2: Iterate and mark inherited tests for cls_name, tests in sorted(patches.items()): location = cache.get(cls_name) if not location: print(f"WARNING: {cls_name} does not exist in remote file", file=sys.stderr) continue lineno, indent = location for test_name, specs in sorted(tests.items()): if test_name == "__self__": # Yielding modifications for the class itself should be done during phase 3 continue decorators = "\n".join(spec.as_decorator() for spec in specs) # Check current class and ancestors for async method is_async = False queue = [cls_name] visited: set[str] = set() while queue: cur = queue.pop(0) if cur in visited: continue visited.add(cur) if test_name in async_methods.get(cur, set()): is_async = True break queue.extend(class_bases.get(cur, [])) if is_async: patch_lines = f""" {decorators} async def {test_name}(self): {DEFAULT_INDENT}return await super().{test_name}() """.rstrip() else: patch_lines = f""" {decorators} def {test_name}(self): {DEFAULT_INDENT}return super().{test_name}() """.rstrip() yield (lineno, textwrap.indent(patch_lines, " " * indent)) # Phase 3: Mark the class itself for cls_node in all_class_nodes: if cls_specs := patches.get(cls_node.name, {}).pop("__self__", None): yield modification_from_node_specs(cls_node, cls_specs) def _has_unittest_import(tree: ast.Module) -> bool: """Check if 'import unittest' is already present in the file.""" for node in tree.body: if isinstance(node, ast.Import): for alias in node.names: if alias.name == UT and alias.asname is None: return True return False def _find_import_insert_line(tree: ast.Module) -> int: """Find the line number after the last import statement.""" last_import_line = None for node in tree.body: if isinstance(node, (ast.Import, ast.ImportFrom)): last_import_line = node.end_lineno or node.lineno if last_import_line is not None: return last_import_line # No imports found - insert after module docstring if present, else at top if ( tree.body and isinstance(tree.body[0], ast.Expr) and isinstance(tree.body[0].value, ast.Constant) and isinstance(tree.body[0].value.value, str) ): return tree.body[0].end_lineno or tree.body[0].lineno return 0 def _expand_inline_class_suites(contents: str, patches: Patches) -> str: """Make room for inherited overrides without changing existing class bodies.""" tree = ast.parse(contents) lines = contents.splitlines() replacements = [] for node in _iter_module_classes(tree): methods = {method.name for method in _iter_class_methods(node)} inherited = set(patches.get(node.name, {})) - methods - {"__self__"} if not inherited: continue first = node.body[0] line = lines[first.lineno - 1].encode("utf-8") header = line[: first.col_offset].decode("utf-8") if not header.strip(): continue body = line[first.col_offset :].decode("utf-8") replacements.append( ( first.lineno - 1, header.rstrip() + "\n" + " " * (node.col_offset + 4) + body, ) ) for index, replacement in sorted(replacements, reverse=True): lines[index] = replacement return "\n".join(lines) + "\n" def apply_patches(contents: str, patches: Patches) -> str: """Apply patches to file contents and return modified contents.""" contents = _expand_inline_class_suites(contents, patches) tree = ast.parse(contents) lines = contents.splitlines() modifications = list(_iter_patch_lines(tree, patches)) # If we have modifications and unittest is not imported, add it if modifications and not _has_unittest_import(tree): import_line = _find_import_insert_line(tree) modifications.append( ( import_line, "\nimport unittest # XXX: RUSTPYTHON; importing to be able to skip tests", ) ) # Going in reverse to not disrupt the line offset for lineno, patch in sorted(modifications, reverse=True): lines.insert(lineno, patch) joined = "\n".join(lines) ast.parse(joined) return f"{joined}\n" def patches_to_json(patches: Patches) -> dict: """Convert patches to JSON-serializable dict.""" return { cls_name: { test_name: [spec._asdict() for spec in specs] for test_name, specs in tests.items() } for cls_name, tests in patches.items() } def patches_from_json(data: dict) -> Patches: """Convert JSON dict back to Patches.""" return { cls_name: { test_name: [ PatchSpec(**spec)._replace(ut_method=UtMethod(spec["ut_method"])) for spec in specs ] for test_name, specs in tests.items() } for cls_name, tests in data.items() } def _single_to_double_quotes(s: str) -> str: """ Convert single-quoted strings to double-quoted strings. Falls back to original if conversion breaks the AST equivalence. """ import re def replace_string(match: re.Match) -> str: content = match.group(1) # Unescape single quotes and escape double quotes content = content.replace("\\'", "'").replace('"', '\\"') return f'"{content}"' # Match single-quoted strings (handles escaped single quotes inside) converted = re.sub(r"'((?:[^'\\]|\\.)*)'", replace_string, s) # Verify: parse converted and unparse should equal original try: converted_ast = ast.parse(converted, mode="eval") if ast.unparse(converted_ast) == s: return converted except SyntaxError: pass # Fall back to original if conversion failed return s @contextlib.contextmanager def temp_attr(obj: object, attr: str, value: object): old = getattr(obj, attr, None) setattr(obj, attr, value) try: yield obj finally: setattr(obj, attr, old) def _conditional_retirements(document, old_content): entries = document.get("retire_conditional", []) if not isinstance(entries, list): raise ValueError("Conditional retirements must be a list") if not entries: return {} if not isinstance(old_content, str): raise ValueError("Conditional retirements require original source") tree = ast.parse(old_content) lines = old_content.splitlines(keepends=True) result = {} for entry in entries: if not isinstance(entry, dict) or set(entry) != { "class", "method", "decorator", }: raise ValueError("Invalid conditional retirement metadata") if not all(isinstance(value, str) and value for value in entry.values()): raise ValueError("Conditional retirement fields must be nonempty strings") key = (entry["class"], entry["method"]) if key in result: raise ValueError("Duplicate conditional retirement") classes = [ node for node in ast.walk(tree) if isinstance(node, ast.ClassDef) and node.name == key[0] ] if len(classes) != 1: raise ValueError("Missing or ambiguous conditional retirement class") methods = [ node for node in _iter_class_methods(classes[0]) if node.name == key[1] ] if len(methods) != 1: raise ValueError("Missing or ambiguous conditional retirement method") matches = [ node for node in methods[0].decorator_list if "".join(lines[node.lineno - 1 : node.end_lineno]) == entry["decorator"] ] if len(matches) != 1: raise ValueError( "Original conditional decorator does not match exactly once" ) marker = PatchSpec.try_from_ast_node(matches[0], old_content.splitlines()) if marker is None or marker.ut_method not in ( UtMethod.ExpectedFailureIf, UtMethod.Skip, ): raise ValueError( "Only explicit expectedFailureIf and skip retirements are supported" ) result[key] = marker return result def select_remaining_patches( current, document, relative_path: Path, *, old_content=None ): if not isinstance(document, dict) or ( not {"target", "patches"} <= set(document) or not set(document) <= {"target", "patches", "doctests", "retire_conditional", "blocks"} ): raise ValueError("Expected target and patches metadata") if ( relative_path.parts[:1] != ("Lib",) or relative_path.suffix != ".py" or document["target"] != relative_path.as_posix() ): raise ValueError("Patch target does not match the Lib file") if "doctests" in document and not isinstance(document["doctests"], dict): raise ValueError("Doctests metadata must be an object") try: remaining = patches_from_json(document["patches"]) except (TypeError, KeyError, AttributeError, ValueError) as error: raise ValueError("Invalid remaining marker metadata") from error retirements = _conditional_retirements(document, old_content) consumed = set() for cls, methods in remaining.items(): if cls not in current or any(method not in current[cls] for method in methods): raise ValueError("Marker override cannot add targets") for cls, methods in current.items(): for method, existing in methods.items(): pending = list(existing) omitted = [] for marker in remaining.get(cls, {}).get(method, []): original = marker if ( original not in pending and marker.ut_method == UtMethod.ExpectedFailureIf and marker.cond ): # A condition only retires part of an unconditional failure. original = marker._replace( ut_method=UtMethod.ExpectedFailure, cond=None ) if original not in pending: raise ValueError( "Marker override cannot add, change, or reorder markers" ) index = pending.index(original) omitted.extend(pending[:index]) pending = pending[index + 1 :] omitted.extend(pending) for marker in omitted: if marker.ut_method == UtMethod.ExpectedFailure: continue key = (cls, method) if ( key in consumed or retirements.get(key) != marker or existing.count(marker) != 1 ): raise ValueError( "Conditional removal requires an exact explicit retirement" ) consumed.add(key) if consumed != set(retirements): raise ValueError("Conditional retirement was not removed exactly once") return remaining EXPECTED_FAILURE = doctest.register_optionflag("EXPECTED_FAILURE") CANONICAL_LOAD_TESTS = """def load_tests(loader, tests, pattern): tests.addTest(doctest.DocTestSuite()) return tests""" PATCHED_LOAD_TESTS = """def load_tests(loader, tests, pattern): from test.support.rustpython import DocTestChecker # TODO: RUSTPYTHON tests.addTest(doctest.DocTestSuite(checker=DocTestChecker())) # TODO: RUSTPYTHON return tests""" def _examples(contents): tree = ast.parse(contents) if not tree.body or not isinstance(tree.body[0], ast.Expr): raise ValueError("Missing module doctest") doc = tree.body[0].value if not isinstance(doc, ast.Constant) or not isinstance(doc.value, str): raise ValueError("Missing module doctest") # Raw docstring offsets map directly to source lines, unlike cleaned docs. return tree, doc, doctest.DocTestParser().get_examples(doc.value) def apply_doctest_metadata(old, canonical, metadata): """Preserve only listed guards, without carrying old expected output.""" if not isinstance(metadata, dict) or any( not isinstance(source, str) or not isinstance(reason, str) or "\n" in reason or "\r" in reason for source, reason in metadata.items() ): raise ValueError("Doctest metadata must map exact input to single-line reasons") _, _, old_examples = _examples(old) tree, doc, examples = _examples(canonical) lines = canonical.splitlines(keepends=True) for source in metadata: old_matches = [ example for example in old_examples if re.sub(r"\s+# TODO: RUSTPYTHON[^\n]*", "", example.source) == source ] if len(old_matches) != 1 or not old_matches[0].options.get(EXPECTED_FAILURE): raise ValueError("Missing or ambiguous existing doctest guard") matches = [example for example in examples if example.source == source] if len(matches) != 1 or matches[0].options: raise ValueError("Missing, ambiguous, or already marked canonical doctest") index = doc.lineno - 1 + matches[0].lineno line = lines[index] if ( ">>>" not in line or line.split(">>>", 1)[1].strip() != source.splitlines()[0] ): raise ValueError("Unrecognized canonical doctest prompt") lines[index] = ( line.rstrip("\n") + " # TODO: RUSTPYTHON; " + metadata[source] + " # doctest: +EXPECTED_FAILURE\n" ) if not metadata: return canonical loaders = [ node for node in ast.walk(tree) if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)) and node.name == "load_tests" ] if len(loaders) != 1 or loaders[0] not in tree.body: raise ValueError("Missing or ambiguous doctest loader") if ast.get_source_segment(canonical, loaders[0]) != CANONICAL_LOAD_TESTS: raise ValueError("Changed canonical doctest loader") result = "".join(lines) if result.count(CANONICAL_LOAD_TESTS) != 1: raise ValueError("Ambiguous canonical doctest loader text") return result.replace(CANONICAL_LOAD_TESTS, PATCHED_LOAD_TESTS, 1) def extract_doctest_guards(contents: str) -> dict[str, str]: """Extract guarded module-docstring inputs without executing examples.""" tree = ast.parse(contents) if not tree.body or not isinstance(tree.body[0], ast.Expr): return {} doc = tree.body[0].value if not isinstance(doc, ast.Constant) or not isinstance(doc.value, str): return {} guards = {} for example in doctest.DocTestParser().get_examples(doc.value): if not example.options.get(EXPECTED_FAILURE): continue source = re.sub(r"\s+# TODO: RUSTPYTHON[^\n]*", "", example.source) if source in guards: raise ValueError("Ambiguous existing doctest guard") guards[source] = example.source return guards |
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