RustPython/scripts/update_lib/deps.py at main · RustPython/RustPython · GitHub

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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": [

"picklecommon.py",

"test_pickle.py",

"test_picklebuffer.py",

"test_pickletools.py",

"test_xpickle.py",

"xpickle_worker.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",

"signal": {

"test": [

"signalinterproctester.py",

"test_signal.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:

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:

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:

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:

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:

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.

View remainder of file in raw view

RustPython/scripts/update_lib/deps.py at main · RustPython/RustPython · GitHub

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