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"""
Dependency resolution for library updates.
Handles:
- Irregular library paths (e.g., libregrtest at Lib/test/libregrtest/)
- Library dependencies (e.g., datetime requires _pydatetime)
- Test dependencies (auto-detected from 'from test import ...')
"""
import ast
import difflib
import functools
import pathlib
import shelve
import subprocess
from update_lib.file_utils import (
_dircmp_is_same,
compare_dir_contents,
compare_file_contents,
compare_paths,
construct_lib_path,
cpython_to_local_path,
read_python_files,
resolve_module_path,
resolve_test_path,
safe_parse_ast,
safe_read_text,
)
# === Import parsing utilities ===
class ImportVisitor(ast.NodeVisitor):
def __init__(self) -> None:
self.__imports = set()
@property
def test_imports(self) -> set[str]:
imports = set()
for module in self.__imports:
if not module.startswith("test."):
continue
name = module.removeprefix("test.")
if name == "support" or name.startswith("support."):
continue
imports.add(name)
return imports
@property
def lib_imports(self) -> set[str]:
return {module for module in self.__imports if not module.startswith("test.")}
def visit_Import(self, node):
for alias in node.names:
self.__imports.add(alias.name)
def visit_ImportFrom(self, node):
try:
module = node.module
except AttributeError:
# Ignore `from . import my_internal_module`
return
if module is None: # Ignore `from . import my_internal_module`
return
for alias in node.names:
# We only care about what we import if it was from the "test" module
if module == "test":
name = f"{module}.{alias.name}"
else:
name = module
self.__imports.add(name)
def visit_Call(self, node) -> None:
"""
In test files, there's sometimes use of:
```python
import test.support
from test.support import script_helper
script = support.findfile("_test_atexit.py")
script_helper.run_test_script(script)
```
This imports "_test_atexit.py" but does not show as an import node.
"""
func = node.func
if not isinstance(func, ast.Attribute):
return
value = func.value
if not isinstance(value, ast.Name):
return
if (value.id != "support") or (func.attr != "findfile"):
return
arg = node.args[0]
if not isinstance(arg, ast.Constant):
return
target = arg.value
if not target.endswith(".py"):
return
target = target.removesuffix(".py")
self.__imports.add(f"test.{target}")
def parse_test_imports(content: str) -> frozenset[str]:
"""Parse test file content and extract test package dependencies."""
if not (tree := safe_parse_ast(content)):
return set()
visitor = ImportVisitor()
visitor.visit(tree)
return visitor.test_imports
def parse_lib_imports(content: str) -> frozenset[str]:
"""Parse library file and extract all imported module names."""
if not (tree := safe_parse_ast(content)):
return set()
visitor = ImportVisitor()
visitor.visit(tree)
return visitor.lib_imports
# === TODO marker utilities ===
TODO_MARKER = "TODO: RUSTPYTHON"
def filter_rustpython_todo(content: str) -> str:
"""Remove lines containing RustPython TODO markers."""
lines = content.splitlines(keepends=True)
return "".join(line for line in lines if TODO_MARKER not in line)
def count_rustpython_todo(content: str) -> int:
"""Count lines containing RustPython TODO markers."""
return content.count(TODO_MARKER)
def count_todo_in_path(path: pathlib.Path) -> int:
"""Count RustPython TODO markers in a file or directory of .py files."""
if path.is_file():
content = safe_read_text(path)
return count_rustpython_todo(content) if content else 0
return sum(count_rustpython_todo(content) for _, content in read_python_files(path))
# === Test utilities ===
def _get_cpython_test_path(test_name: str, cpython_prefix: str) -> pathlib.Path | None:
"""Return the CPython test path for a test name, or None if missing."""
cpython_path = resolve_test_path(test_name, cpython_prefix, prefer="dir")
return cpython_path if cpython_path.exists() else None
def _get_local_test_path(
cpython_test_path: pathlib.Path, lib_prefix: str
) -> pathlib.Path:
"""Return the local Lib/test path matching a CPython test path."""
return pathlib.Path(lib_prefix) / "test" / cpython_test_path.name
def is_test_tracked(test_name: str, cpython_prefix: str, lib_prefix: str) -> bool:
"""Check if a test exists in the local Lib/test."""
cpython_path = _get_cpython_test_path(test_name, cpython_prefix)
if cpython_path is None:
return True
local_path = _get_local_test_path(cpython_path, lib_prefix)
return local_path.exists()
def is_test_up_to_date(test_name: str, cpython_prefix: str, lib_prefix: str) -> bool:
"""Check if a test is up-to-date, ignoring RustPython TODO markers."""
cpython_path = _get_cpython_test_path(test_name, cpython_prefix)
if cpython_path is None:
return True
local_path = _get_local_test_path(cpython_path, lib_prefix)
if not local_path.exists():
return False
if cpython_path.is_file():
return compare_file_contents(
cpython_path, local_path, local_filter=filter_rustpython_todo
)
return compare_dir_contents(
cpython_path, local_path, local_filter=filter_rustpython_todo
)
def count_test_todos(test_name: str, lib_prefix: str) -> int:
"""Count RustPython TODO markers in a test file/directory."""
local_dir = pathlib.Path(lib_prefix) / "test" / test_name
local_file = pathlib.Path(lib_prefix) / "test" / f"{test_name}.py"
if local_dir.exists():
return count_todo_in_path(local_dir)
if local_file.exists():
return count_todo_in_path(local_file)
return 0
# === Cross-process cache using shelve ===
def _get_cpython_version(cpython_prefix: str) -> str:
"""Get CPython version from git tag for cache namespace."""
try:
result = subprocess.run(
["git", "describe", "--tags", "--abbrev=0"],
cwd=cpython_prefix,
capture_output=True,
text=True,
)
if result.returncode == 0:
return result.stdout.strip()
except Exception:
pass
return "unknown"
def _get_cache_path() -> str:
"""Get cache file path (without extension - shelve adds its own)."""
cache_dir = pathlib.Path(__file__).parent / ".cache"
cache_dir.mkdir(parents=True, exist_ok=True)
return str(cache_dir / "import_graph_cache")
def clear_import_graph_caches() -> None:
"""Clear in-process import graph caches (for testing)."""
if "_test_import_graph_cache" in globals():
globals()["_test_import_graph_cache"].clear()
if "_lib_import_graph_cache" in globals():
globals()["_lib_import_graph_cache"].clear()
# Manual dependency table for irregular cases
# Format: "name" -> {"lib": [...], "test": [...], "data": [...], "hard_deps": [...]}
# - lib: override default path (default: name.py or name/)
# - hard_deps: additional files to copy alongside the main module
DEPENDENCIES = {
# regrtest is in Lib/test/libregrtest/, not Lib/libregrtest/
"regrtest": {
"lib": ["test/libregrtest"],
"test": ["test_regrtest"],
"data": ["test/regrtestdata"],
},
# Rust-implemented modules (no lib file, only test)
"int": {
"lib": [],
"hard_deps": ["_pylong.py"],
"test": [
"test_int.py",
"test_long.py",
"test_int_literal.py",
],
},
"exception": {
"lib": [],
"test": [
"test_exceptions.py",
"test_baseexception.py",
"test_except_star.py",
"test_exception_group.py",
"test_exception_hierarchy.py",
"test_exception_variations.py",
],
},
"dict": {
"lib": [],
"test": [
"test_dict.py",
"test_dictcomps.py",
"test_dictviews.py",
"test_userdict.py",
"mapping_tests.py",
],
},
"list": {
"lib": [],
"test": [
"test_list.py",
"test_listcomps.py",
"test_userlist.py",
],
},
"__future__": {
"test": [
"test___future__.py",
"test_future_stmt.py",
],
},
"site": {
"hard_deps": ["_sitebuiltins.py"],
},
"opcode": {
"hard_deps": ["_opcode_metadata.py"],
"test": [
"test_opcode.py",
"test__opcode.py",
"test_opcodes.py",
],
},
"pickle": {
"hard_deps": ["_compat_pickle.py"],
"test": [
"test_pickle.py",
"test_picklebuffer.py",
"test_pickletools.py",
],
},
"re": {
"hard_deps": ["sre_compile.py", "sre_constants.py", "sre_parse.py"],
"test": [
"test_re.py",
"re_tests.py",
],
},
"weakref": {
"hard_deps": ["_weakrefset.py"],
"test": [
"test_weakref.py",
"test_weakset.py",
],
},
"codecs": {
"test": [
"test_charmapcodec.py",
"test_codeccallbacks.py",
"test_codecencodings_cn.py",
"test_codecencodings_hk.py",
"test_codecencodings_iso2022.py",
"test_codecencodings_jp.py",
"test_codecencodings_kr.py",
"test_codecencodings_tw.py",
"test_codecmaps_cn.py",
"test_codecmaps_hk.py",
"test_codecmaps_jp.py",
"test_codecmaps_kr.py",
"test_codecmaps_tw.py",
"test_codecs.py",
"test_multibytecodec.py",
"testcodec.py",
],
},
# Non-pattern hard_deps (can't be auto-detected)
"ast": {
"hard_deps": ["_ast_unparse.py"],
"test": [
"test_ast.py",
"test_unparse.py",
"test_type_comments.py",
],
},
# Data directories
"pydoc": {
"hard_deps": ["pydoc_data"],
},
"turtle": {
"hard_deps": ["turtledemo"],
},
"sysconfig": {
"hard_deps": ["_aix_support.py", "_osx_support.py"],
"test": [
"test_sysconfig.py",
"test__osx_support.py",
],
},
"tkinter": {
"test": [
"test_tkinter",
"test_ttk",
"test_ttk_textonly.py",
"test_tcl.py",
"test_idle",
],
},
# Test support library (like regrtest)
"support": {
"lib": ["test/support"],
"data": ["test/wheeldata"],
"test": [
"test_support.py",
"test_script_helper.py",
],
},
# test_htmlparser tests html.parser
"html": {
"hard_deps": ["_markupbase.py"],
"test": ["test_html.py", "test_htmlparser.py"],
},
"xml": {
"test": [
"test_xml_etree.py",
"test_xml_etree_c.py",
"test_minidom.py",
"test_pulldom.py",
"test_pyexpat.py",
"test_sax.py",
"test_xml_dom_minicompat.py",
"test_xml_dom_xmlbuilder.py",
],
},
"multiprocessing": {
"test": [
"test_multiprocessing_fork",
"test_multiprocessing_forkserver",
"test_multiprocessing_spawn",
"test_multiprocessing_main_handling.py",
"_test_multiprocessing.py",
],
},
"urllib": {
"test": [
"test_urllib.py",
"test_urllib2.py",
"test_urllib2_localnet.py",
"test_urllib2net.py",
"test_urllibnet.py",
"test_urlparse.py",
"test_urllib_response.py",
"test_robotparser.py",
],
},
"collections": {
"hard_deps": ["_collections_abc.py"],
"test": [
"test_collections.py",
"test_deque.py",
"test_defaultdict.py",
"test_ordered_dict.py",
],
},
"http": {
"test": [
"test_httplib.py",
"test_http_cookiejar.py",
"test_http_cookies.py",
"test_httpservers.py",
],
},
"unicode": {
"lib": [],
"test": [
"test_unicodedata.py",
"test_unicode_file.py",
"test_unicode_file_functions.py",
"test_unicode_identifiers.py",
"test_ucn.py",
],
},
"typing": {
"test": [
"test_typing.py",
"test_type_aliases.py",
"test_type_annotations.py",
"test_type_params.py",
"test_genericalias.py",
],
},
"unpack": {
"lib": [],
"test": [
"test_unpack.py",
"test_unpack_ex.py",
],
},
"zipimport": {
"test": [
"test_zipimport.py",
"test_zipimport_support.py",
],
},
"time": {
"lib": [],
"test": [
"test_time.py",
"test_strftime.py",
],
},
"sys": {
"lib": [],
"test": [
"test_sys.py",
"test_syslog.py",
"test_sys_setprofile.py",
"test_sys_settrace.py",
"test_audit.py",
"audit-tests.py",
],
},
"str": {
"lib": [],
"test": [
"test_str.py",
"test_fstring.py",
"test_string_literals.py",
],
},
"thread": {
"lib": [],
"test": [
"test_thread.py",
"test_thread_local_bytecode.py",
"test_threadsignals.py",
],
},
"threading": {
"hard_deps": ["_threading_local.py"],
"test": [
"test_threading.py",
"test_threadedtempfile.py",
"test_threading_local.py",
],
},
"class": {
"lib": [],
"test": [
"test_class.py",
"test_genericclass.py",
"test_subclassinit.py",
],
},
"generator": {
"lib": [],
"test": [
"test_generators.py",
"test_genexps.py",
"test_generator_stop.py",
"test_yield_from.py",
],
},
"descr": {
"lib": [],
"test": [
"test_descr.py",
"test_descrtut.py",
],
},
"code": {
"test": [
"test_code_module.py",
],
},
"contextlib": {
"test": [
"test_contextlib.py",
"test_contextlib_async.py",
],
},
"io": {
"hard_deps": ["_pyio.py"],
"test": [
"test_io.py",
"test_bufio.py",
"test_fileio.py",
"test_memoryio.py",
],
},
"dbm": {
"test": [
"test_dbm.py",
"test_dbm_dumb.py",
"test_dbm_gnu.py",
"test_dbm_ndbm.py",
"test_dbm_sqlite3.py",
],
},
"datetime": {
"hard_deps": ["_strptime.py"],
"test": [
"test_datetime.py",
"test_strptime.py",
],
},
"locale": {
"test": [
"test_locale.py",
"test__locale.py",
],
},
"numbers": {
"test": [
"test_numbers.py",
"test_abstract_numbers.py",
],
},
"file": {
"lib": [],
"test": [
"test_file.py",
"test_largefile.py",
],
},
"fcntl": {
"lib": [],
"test": [
"test_fcntl.py",
"test_ioctl.py",
],
},
"select": {
"lib": [],
"test": [
"test_select.py",
"test_poll.py",
],
},
"xmlrpc": {
"test": [
"test_xmlrpc.py",
"test_docxmlrpc.py",
],
},
"ctypes": {
"test": [
"test_ctypes",
"test_stable_abi_ctypes.py",
],
},
# Grouped tests for modules without custom lib paths
"compile": {
"lib": [],
"test": [
"test_compile.py",
"test_compiler_assemble.py",
"test_compiler_codegen.py",
"test_peepholer.py",
],
},
"math": {
"lib": [],
"test": [
"test_math.py",
"test_math_property.py",
],
},
"float": {
"lib": [],
"test": [
"test_float.py",
"test_strtod.py",
],
},
"zipfile": {
"test": [
"test_zipfile.py",
"test_zipfile64.py",
],
},
"smtplib": {
"test": [
"test_smtplib.py",
"test_smtpnet.py",
],
},
"profile": {
"test": [
"test_profile.py",
"test_cprofile.py",
],
},
"string": {
"test": [
"test_string.py",
"test_userstring.py",
],
},
"os": {
"test": [
"test_os.py",
"test_popen.py",
],
},
"pyrepl": {
"test": [
"test_pyrepl",
"test_repl.py",
],
},
"concurrent": {
"test": [
"test_concurrent_futures",
"test_interpreters",
"test__interpreters.py",
"test__interpchannels.py",
"test_crossinterp.py",
],
},
"atexit": {
"test": [
"test_atexit.py",
"_test_atexit.py",
],
},
"eintr": {
"test": [
"test_eintr.py",
"_test_eintr.py",
]
},
"curses": {
"test": [
"test_curses.py",
"curses_tests.py",
],
},
}
def resolve_hard_dep_parent(name: str, cpython_prefix: str) -> str | None:
"""Resolve a hard_dep name to its parent module.
Only returns a parent if the file is actually tracked:
- Explicitly listed in DEPENDENCIES as a hard_dep
- Or auto-detected _py{module}.py pattern where the parent module exists
Args:
name: Module or file name (with or without .py extension)
cpython_prefix: CPython directory prefix
Returns:
Parent module name if found and tracked, None otherwise
"""
# Normalize: remove .py extension if present
if name.endswith(".py"):
name = name[:-3]
# Check DEPENDENCIES table first (explicit hard_deps)
for module_name, dep_info in DEPENDENCIES.items():
hard_deps = dep_info.get("hard_deps", [])
for dep in hard_deps:
# Normalize dep: remove .py extension
dep_normalized = dep[:-3] if dep.endswith(".py") else dep
if dep_normalized == name:
return module_name
# Auto-detect _py{module} or _py_{module} patterns
# Only if the parent module actually exists
if name.startswith("_py"):
# _py_abc -> abc
# _pydatetime -> datetime
parent = name.removeprefix("_py_").removeprefix("_py")
# Verify the parent module exists
lib_dir = pathlib.Path(cpython_prefix) / "Lib"
parent_file = lib_dir / f"{parent}.py"
parent_dir = lib_dir / parent
if parent_file.exists() or (
parent_dir.exists() and (parent_dir / "__init__.py").exists()
):
return parent
return None
def resolve_test_to_lib(test_name: str) -> str | None:
"""Resolve a test name to its library group from DEPENDENCIES.
Args:
test_name: Test name with or without test_ prefix (e.g., "test_urllib2" or "urllib2")
Returns:
Library name if test belongs to a group, None otherwise
"""
# Normalize: add test_ prefix if not present
if not test_name.startswith("test_"):
test_name = f"test_{test_name}"
for lib_name, dep_info in DEPENDENCIES.items():
tests = dep_info.get("test", [])
for test_path in tests:
# test_path is like "test_urllib2.py" or "test_multiprocessing_fork"
path_stem = test_path.removesuffix(".py")
if path_stem == test_name:
return lib_name
return None
# Test-specific dependencies (only when auto-detection isn't enough)
# - hard_deps: files to migrate (tightly coupled, must be migrated together)
# - data: directories to copy without migration
TEST_DEPENDENCIES = {
# Audio tests
"test_winsound": {
"data": ["audiodata"],
},
"test_wave": {
"data": ["audiodata"],
},
"audiotests": {
"data": ["audiodata"],
},
# Archive tests
"test_tarfile": {
"data": ["archivetestdata"],
},
"test_zipfile": {
"data": ["archivetestdata"],
},
# Config tests
"test_configparser": {
"data": ["configdata"],
},
"test_config": {
"data": ["configdata"],
},
# Other data directories
"test_decimal": {
"data": ["decimaltestdata"],
},
"test_dtrace": {
"data": ["dtracedata"],
},
"test_math": {
"data": ["mathdata"],
},
"test_ssl": {
"data": ["certdata"],
},
"test_subprocess": {
"data": ["subprocessdata"],
},
"test_tkinter": {
"data": ["tkinterdata"],
},
"test_tokenize": {
"data": ["tokenizedata"],
},
"test_type_annotations": {
"data": ["typinganndata"],
},
"test_zipimport": {
"data": ["zipimport_data"],
},
# XML tests share xmltestdata
"test_xml_etree": {
"data": ["xmltestdata"],
},
"test_pulldom": {
"data": ["xmltestdata"],
},
"test_sax": {
"data": ["xmltestdata"],
},
"test_minidom": {
"data": ["xmltestdata"],
},
# Multibytecodec support needs cjkencodings
"multibytecodec_support": {
"data": ["cjkencodings"],
},
# i18n
"i18n_helper": {
"data": ["translationdata"],
},
# wheeldata is used by test_makefile and support
"test_makefile": {
"data": ["wheeldata"],
},
# profilee is used by test_monitoring
"test_monitoring": {
"hard_deps": ["profilee"],
},
}
@functools.cache
def get_lib_paths(name: str, cpython_prefix: str) -> tuple[pathlib.Path, ...]:
"""Get all library paths for a module.
Args:
name: Module name (e.g., "datetime", "libregrtest")
cpython_prefix: CPython directory prefix
Returns:
Tuple of paths to copy
"""
dep_info = DEPENDENCIES.get(name, {})
# Get main lib path (override or default)
if "lib" in dep_info:
paths = [construct_lib_path(cpython_prefix, p) for p in dep_info["lib"]]
else:
# Default: try file first, then directory
paths = [resolve_module_path(name, cpython_prefix, prefer="file")]
# Add hard_deps from DEPENDENCIES
for dep in dep_info.get("hard_deps", []):
paths.append(construct_lib_path(cpython_prefix, dep))
# Auto-detect _py{module}.py or _py_{module}.py patterns
for pattern in [f"_py{name}.py", f"_py_{name}.py"]:
auto_path = construct_lib_path(cpython_prefix, pattern)
if auto_path.exists() and auto_path not in paths:
paths.append(auto_path)
return tuple(paths)
def get_all_hard_deps(name: str, cpython_prefix: str) -> list[str]:
"""Get all hard_deps for a module (explicit + auto-detected).
Args:
name: Module name (e.g., "decimal", "datetime")
cpython_prefix: CPython directory prefix
Returns:
List of hard_dep names (without .py extension)
"""
dep_info = DEPENDENCIES.get(name, {})
hard_deps = set()
# Explicit hard_deps from DEPENDENCIES
for hd in dep_info.get("hard_deps", []):
# Remove .py extension if present
hard_deps.add(hd[:-3] if hd.endswith(".py") else hd)
# Auto-detect _py{module}.py or _py_{module}.py patterns
for pattern in [f"_py{name}.py", f"_py_{name}.py"]:
auto_path = construct_lib_path(cpython_prefix, pattern)
if auto_path.exists():
hard_deps.add(auto_path.stem)
return sorted(hard_deps)
@functools.cache
def get_test_paths(name: str, cpython_prefix: str) -> tuple[pathlib.Path, ...]:
"""Get all test paths for a module.
Args:
name: Module name (e.g., "datetime", "libregrtest")
cpython_prefix: CPython directory prefix
Returns:
Tuple of test paths
"""
if name in DEPENDENCIES and "test" in DEPENDENCIES[name]:
return tuple(
construct_lib_path(cpython_prefix, f"test/{p}")
for p in DEPENDENCIES[name]["test"]
)
# Default: try directory first, then file
return (resolve_module_path(f"test/test_{name}", cpython_prefix, prefer="dir"),)
@functools.cache
def get_all_imports(name: str, cpython_prefix: str) -> frozenset[str]:
"""Get all imports from a library file.
Args:
name: Module name
cpython_prefix: CPython directory prefix
Returns:
Frozenset of all imported module names
"""
all_imports = set()
for lib_path in get_lib_paths(name, cpython_prefix):
if lib_path.exists():
for _, content in read_python_files(lib_path):
all_imports.update(parse_lib_imports(content))
# Remove self
all_imports.discard(name)
return frozenset(all_imports)
@functools.cache
def get_soft_deps(name: str, cpython_prefix: str) -> frozenset[str]:
"""Get soft dependencies by parsing imports from library file.
Args:
name: Module name
cpython_prefix: CPython directory prefix
Returns:
Frozenset of imported stdlib module names (those that exist in cpython/Lib/)
"""
all_imports = get_all_imports(name, cpython_prefix)