diff --git a/packaging/pep517_backend/_backend.py b/packaging/pep517_backend/_backend.py index 9c253296ff0..d4d10f2364c 100644 --- a/packaging/pep517_backend/_backend.py +++ b/packaging/pep517_backend/_backend.py @@ -3,6 +3,7 @@ from __future__ import annotations import os +import re import subprocess import sys import typing as t @@ -131,6 +132,19 @@ def build_sdist( # noqa: WPS210, WPS430 ) rst_in.unlink() + Path('pyproject.toml').write_text( + re.sub( + r"""(?x) + backend-path\s=\s\[ # value is a list of double-quoted strings + [^]]+ + ].*\n + build-backend\s=\s"[^"]+".*\n # value is double-quoted + """, + 'build-backend = "setuptools.build_meta"\n', + Path('pyproject.toml').read_text(), + ) + ) + built_sdist_basename = _setuptools_build_sdist( sdist_directory=sdist_directory, config_settings=config_settings, diff --git a/test/integration/targets/canonical-pep517-self-packaging/runme_test.py b/test/integration/targets/canonical-pep517-self-packaging/runme_test.py index 0fea1da6739..86b0f7532a8 100644 --- a/test/integration/targets/canonical-pep517-self-packaging/runme_test.py +++ b/test/integration/targets/canonical-pep517-self-packaging/runme_test.py @@ -3,14 +3,28 @@ from __future__ import annotations from filecmp import dircmp -from os import environ +from os import chdir, environ, PathLike from pathlib import Path from shutil import rmtree from subprocess import check_call, check_output, PIPE -from sys import executable as current_interpreter +from sys import executable as current_interpreter, version_info from tarfile import TarFile import typing as t +try: + from contextlib import chdir as _chdir_cm +except ImportError: + from contextlib import contextmanager as _contextmanager + + @_contextmanager + def _chdir_cm(path: PathLike) -> t.Iterator[None]: + original_wd = Path.cwd() + chdir(path) + try: + yield + finally: + chdir(original_wd) + import pytest @@ -36,6 +50,8 @@ EXPECTED_SDIST_NAME_BASE = f'{DIST_FILENAME_BASE}-{PKG_DIST_VERSION}' EXPECTED_SDIST_NAME = f'{EXPECTED_SDIST_NAME_BASE}.tar.gz' EXPECTED_WHEEL_NAME = f'{DIST_NAME}-{PKG_DIST_VERSION}-py3-none-any.whl' +IS_PYTHON310_PLUS = version_info[:2] >= (3, 10) + def wipe_generated_manpages() -> None: """Ensure man1 pages aren't present in the source checkout.""" @@ -117,22 +133,114 @@ def venv_python_exe(tmp_path: Path) -> t.Iterator[Path]: rmtree(venv_path) +def run_with_venv_python( + python_exe: Path, *cli_args: t.Iterable[str], + env_vars: t.Dict[str, str] = None, +) -> str: + if env_vars is None: + env_vars = {} + full_cmd = str(python_exe), *cli_args + return check_output(full_cmd, env=env_vars, stderr=PIPE) + + def build_dists( python_exe: Path, *cli_args: t.Iterable[str], env_vars: t.Dict[str, str], ) -> str: - full_cmd = str(python_exe), '-m', 'build', *cli_args - return check_output(full_cmd, env=env_vars, stderr=PIPE) + return run_with_venv_python( + python_exe, '-m', 'build', + *cli_args, env_vars=env_vars, + ) def pip_install( python_exe: Path, *cli_args: t.Iterable[str], env_vars: t.Dict[str, str] = None, ) -> str: - if env_vars is None: - env_vars = {} - full_cmd = str(python_exe), '-m', 'pip', 'install', *cli_args - return check_output(full_cmd, env=env_vars, stderr=PIPE) + return run_with_venv_python( + python_exe, '-m', 'pip', 'install', + *cli_args, env_vars=env_vars, + ) + + +def test_installing_sdist_build_with_modern_deps_to_old_env( + venv_python_exe: Path, tmp_path: Path, +) -> None: + pip_install(venv_python_exe, 'build ~= 0.10.0') + tmp_dir_sdist_w_modern_tools = tmp_path / 'sdist-w-modern-tools' + build_dists( + venv_python_exe, '--sdist', + '--config-setting=--build-manpages', + f'--outdir={tmp_dir_sdist_w_modern_tools!s}', + str(SRC_ROOT_DIR), + env_vars={ + 'PIP_CONSTRAINT': str(MODERNISH_BUILD_DEPS_FILE), + }, + ) + tmp_path_sdist_w_modern_tools = ( + tmp_dir_sdist_w_modern_tools / EXPECTED_SDIST_NAME + ) + + # Downgrading pip, because v20+ supports in-tree build backends + pip_install(venv_python_exe, 'pip ~= 19.3.1') + + # Smoke test — installing an sdist with pip that does not support + # in-tree build backends. + pip_install( + venv_python_exe, str(tmp_path_sdist_w_modern_tools), '--no-deps', + ) + + # Downgrading pip, because versions that support PEP 517 don't allow + # disabling it with `--no-use-pep517` when `build-backend` is set in + # the `[build-system]` section of `pyproject.toml`, considering this + # an explicit opt-in. + if not IS_PYTHON310_PLUS: + pip_install(venv_python_exe, 'pip == 18.0') + + # Smoke test — installing an sdist with pip that does not support invoking + # PEP 517 interface at all. + # In this scenario, pip will run `setup.py install` since `wheel` is not in + # the environment. + if IS_PYTHON310_PLUS: + tmp_dir_unpacked_sdist_root = tmp_path / 'unpacked-sdist' + tmp_dir_unpacked_sdist_path = tmp_dir_unpacked_sdist_root / EXPECTED_SDIST_NAME_BASE + with TarFile.gzopen(tmp_path_sdist_w_modern_tools) as sdist_fd: + sdist_fd.extractall(path=tmp_dir_unpacked_sdist_root) + + pip_install( + venv_python_exe, 'setuptools', + env_vars={ + 'PIP_CONSTRAINT': str(LOWEST_SUPPORTED_BUILD_DEPS_FILE), + }, + ) + with _chdir_cm(tmp_dir_unpacked_sdist_path): + run_with_venv_python( + venv_python_exe, 'setup.py', 'sdist', + env_vars={'PATH': environ['PATH']}, + ) + else: + pip_install( + venv_python_exe, str(tmp_path_sdist_w_modern_tools), '--no-deps', + env_vars={ + 'PIP_CONSTRAINT': str(LOWEST_SUPPORTED_BUILD_DEPS_FILE), + }, + ) + + # Smoke test — installing an sdist with pip that does not support invoking + # PEP 517 interface at all. + # With `wheel` present, pip will run `setup.py bdist_wheel` and then, + # unpack the result. + pip_install(venv_python_exe, 'wheel') + if IS_PYTHON310_PLUS: + with _chdir_cm(tmp_dir_unpacked_sdist_path): + run_with_venv_python( + venv_python_exe, 'setup.py', 'bdist_wheel', + env_vars={'PATH': environ['PATH']}, + ) + else: + pip_install( + venv_python_exe, str(tmp_path_sdist_w_modern_tools), '--no-deps', + ) def test_dist_rebuilds_with_manpages_premutations( @@ -209,7 +317,19 @@ def test_dist_rebuilds_with_manpages_premutations( # Checking that the expected sdist got created # from the previous unpacked sdist... assert tmp_path_rebuilt_sdist.exists() - assert contains_man1_pages(tmp_path_rebuilt_sdist) + # NOTE: The following assertion is disabled due to the fact that, when + # NOTE: building an sdist from the original source checkout, the build + # NOTE: backend replaces itself with pure setuptools in the resulting + # NOTE: sdist, and the following rebuilds from that sdist are no longer + # NOTE: able to process the custom config settings that are implemented in + # NOTE: the in-tree build backend. It is expected that said + # NOTE: `pyproject.toml` mutation change will be reverted once all of the + # NOTE: supported `ansible-core` versions ship wheels, meaning that the + # NOTE: end-users won't be building the distribution from sdist on install. + # NOTE: Another case, when it can be reverted is declaring pip below v20 + # NOTE: unsupported — it is the first version to support in-tree build + # NOTE: backends natively. + # assert contains_man1_pages(tmp_path_rebuilt_sdist) # FIXME: See #80255 rebuilt_sdist_path = unpack_sdist( tmp_path_rebuilt_sdist, tmp_dir_rebuilt_sdist / 'src',