diff options
Diffstat (limited to 'setup.py')
| -rw-r--r-- | setup.py | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/setup.py b/setup.py deleted file mode 100644 index 0a24682..0000000 --- a/setup.py +++ /dev/null @@ -1,152 +0,0 @@ -"""setup.py overrides several setuptools commands to integrate the meson-built -libpixpat.so into the Python wheel. - -Layout (where things land for each workflow): - - meson setup build / meson compile -C build — repo-root build/, the - C++ developer's meson dir. Python tooling never touches this. - - pip install -e . — DevEditableWheel - symlinks build/libpixpat.so into pixpat-python/pixpat/_lib/. - Requires the user to have built `build/` themselves. - - pip install . — MesonBuildPy invokes - meson into pixpat-python/build/native/, copies the .so straight into - setuptools' build_lib (pixpat-python/build/lib/pixpat/_lib/), and - bdist_wheel zips that into the wheel. The source tree's _lib/ is - never touched on this path, so wheel builds don't depend on (or - pollute) it. - - scripts/build_wheel.sh <arch> — sets PIXPAT_TARGET_ARCH - and runs `python -m build`; meson lands in pixpat-python/build-<arch>/ - native/, setuptools alongside. - -bdist_wheel: setuptools' default produces a `py3-none-any` (pure-Python) wheel -when there's no compiled extension. We bundle a `.so` as package data, so we -MUST tag the wheel for a specific platform — otherwise pip would -install our x86_64 wheel on an arm64 box. Target arch is read from -PIXPAT_TARGET_ARCH and falls back to the running machine's arch — important -because setuptools' editable_wheel delegates wheel construction to whatever -bdist_wheel is registered, so this class is invoked during `pip install -e .` -too. -""" - -import os -import platform -import shutil -import subprocess -from pathlib import Path - -from setuptools import setup -from setuptools.command.bdist_wheel import bdist_wheel -from setuptools.command.build import build -from setuptools.command.build_py import build_py -from setuptools.command.editable_wheel import editable_wheel - -REPO_ROOT = Path(__file__).resolve().parent -LIB_DIR = REPO_ROOT / 'pixpat-python' / 'pixpat' / '_lib' - - -def _target_arch() -> str: - return os.environ.get('PIXPAT_TARGET_ARCH') or platform.machine() - - -def _wheel_build_root() -> Path: - """Top-level dir where setuptools and meson stage wheel-build output. - - Plain `pip install .` uses pixpat-python/build/. Cross-compile via - PIXPAT_TARGET_ARCH gets a per-arch sibling so meson can keep arches - incrementally compiled side by side. - """ - arch = os.environ.get('PIXPAT_TARGET_ARCH') - suffix = f'-{arch}' if arch else '' - return REPO_ROOT / 'pixpat-python' / f'build{suffix}' - - -class ImpureBdistWheel(bdist_wheel): - def finalize_options(self): - super().finalize_options() - self.root_is_pure = False - - def get_tag(self): - return ('py3', 'none', f'linux_{_target_arch()}') - - -class WheelBuild(build): - """Direct setuptools' staging into pixpat-python/build[-<arch>]/.""" - - def initialize_options(self): - super().initialize_options() - self.build_base = str(_wheel_build_root()) - - -class MesonBuildPy(build_py): - """Compile libpixpat.so via meson and stage it into build_lib for the wheel.""" - - def run(self): - super().run() - # editable_mode is set by setuptools' editable_wheel command. In that - # path DevEditableWheel has already symlinked the user's repo-root - # build/ into the source _lib/, so meson must not run. - if not self.editable_mode: - self._build_native() - - def _build_native(self): - meson_dir = _wheel_build_root() / 'native' - arch = _target_arch() - cross_args = [] - if arch != platform.machine(): - cross_file = REPO_ROOT / 'pixpat-native' / 'cross' / f'{arch}-linux-gnu.txt' - if not cross_file.exists(): - raise SystemExit(f'no cross-file for {arch}: {cross_file}') - cross_args = ['--cross-file', str(cross_file)] - - if not (meson_dir / 'meson-info').exists(): - meson_dir.parent.mkdir(parents=True, exist_ok=True) - subprocess.check_call( - ['meson', 'setup', str(meson_dir), '--buildtype=release', *cross_args], - cwd=REPO_ROOT, - ) - subprocess.check_call(['meson', 'compile', '-C', str(meson_dir)], cwd=REPO_ROOT) - - out_dir = Path(self.build_lib) / 'pixpat' / '_lib' - out_dir.mkdir(parents=True, exist_ok=True) - # follow_symlinks resolves meson's libpixpat.so -> .so.<maj> -> .so.<maj>.<min>.<patch> - # chain into a regular file. The wheel ships only the unversioned name, so we - # don't have to track meson's project version here. - shutil.copy2(meson_dir / 'libpixpat.so', out_dir / 'libpixpat.so') - - -class DevEditableWheel(editable_wheel): - """Symlink the user's repo-root meson build into _lib/ before installing.""" - - def run(self): - build_so = REPO_ROOT / 'build' / 'libpixpat.so' - - if not build_so.exists(): - raise SystemExit( - f'editable install needs {build_so}.\n' - 'Configure and build first:\n' - ' meson setup build\n' - ' meson compile -C build' - ) - - LIB_DIR.mkdir(parents=True, exist_ok=True) - for old in LIB_DIR.glob('libpixpat.so*'): - old.unlink() - # Relative path so the symlink survives moves of the source tree. - (LIB_DIR / 'libpixpat.so').symlink_to( - Path('..') / '..' / '..' / 'build' / 'libpixpat.so' - ) - - super().run() - - -setup( - cmdclass={ - 'bdist_wheel': ImpureBdistWheel, - 'build': WheelBuild, - 'build_py': MesonBuildPy, - 'editable_wheel': DevEditableWheel, - } -) |