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#!/usr/bin/env python
# Copyright (c) 2016-present, Gregory Szorc
# All rights reserved.
#
# This software may be modified and distributed under the terms
# of the BSD license. See the LICENSE file for details.
from __future__ import print_function
import os
import platform
import sys
import sysconfig
from packaging.version import Version
from setuptools import setup
if sys.version_info[0:2] < (3, 9):
print("Python 3.9+ is required", file=sys.stderr)
sys.exit(1)
# Need change in 1.10 for ffi.from_buffer() to handle all buffer types
# (like memoryview).
# Need feature in 1.11 for ffi.gc() to declare size of objects so we avoid
# garbage collection pitfalls.
# Require 1.17 everywhere so we don't have to think about supporting older
# versions.
# Require 2.0 for Python 3.14+ to add improved free-threading support
MINIMUM_CFFI_VERSION = "2.0" if sys.version_info[0:2] >= (3, 14) else "1.17"
ext_suffix = os.environ.get("SETUPTOOLS_EXT_SUFFIX")
if ext_suffix:
import sysconfig
# setuptools._distutils.command.build_ext doesn't use
# SETUPTOOLS_EXT_SUFFIX like setuptools.command.build_ext does.
# Work around the issue so that cross-compilation can work
# properly.
sysconfig.get_config_vars()["EXT_SUFFIX"] = ext_suffix
try:
# Older versions of python didn't have EXT_SUFFIX, and setuptools
# sets its own value, but since we've already set one, we don't
# want setuptools to overwrite it.
import setuptools._distutils.compat.py39 as py39compat
except ImportError:
try:
import setuptools._distutils.py39compat as py39compat
except ImportError:
pass
if py39compat:
py39compat.add_ext_suffix = lambda vars: None
try:
import cffi
# PyPy (and possibly other distros) have CFFI distributed as part of
# them.
cffi_version = Version(Version(cffi.__version__).base_version)
if cffi_version < Version(MINIMUM_CFFI_VERSION):
print(
"CFFI %s or newer required (%s found); "
"not building CFFI backend" % (MINIMUM_CFFI_VERSION, cffi_version),
file=sys.stderr,
)
cffi = None
except ImportError:
cffi = None
sys.path.insert(0, ".")
import setup_zstd # noqa: E402
SUPPORT_LEGACY = False
SYSTEM_ZSTD = True
WARNINGS_AS_ERRORS = False
C_BACKEND = True
CFFI_BACKEND = True
RUST_BACKEND = False
if os.environ.get("ZSTD_WARNINGS_AS_ERRORS", ""):
WARNINGS_AS_ERRORS = True
# PyPy doesn't support the C backend.
if platform.python_implementation() == "PyPy":
C_BACKEND = False
# cffi 2.0 only introduced no-GIL support for 3.14+.
if sys.version_info[0:2] < (3, 14) and sysconfig.get_config_var(
"Py_GIL_DISABLED"
):
print(
"cffi backend requires 3.14+ for nogil Python; disabling cffi",
file=sys.stderr,
)
CFFI_BACKEND = False
if "--legacy" in sys.argv:
SUPPORT_LEGACY = True
sys.argv.remove("--legacy")
if "--system-zstd" in sys.argv:
SYSTEM_ZSTD = True
sys.argv.remove("--system-zstd")
if "--warnings-as-errors" in sys.argv:
WARNINGS_AS_ERRORS = True
sys.argv.remove("--warning-as-errors")
if "--no-c-backend" in sys.argv:
C_BACKEND = False
sys.argv.remove("--no-c-backend")
if "--no-cffi-backend" in sys.argv:
CFFI_BACKEND = False
sys.argv.remove("--no-cffi-backend")
if "--rust-backend" in sys.argv:
RUST_BACKEND = True
sys.argv.remove("--rust-backend")
# Code for obtaining the Extension instance is in its own module to
# facilitate reuse in other projects.
extensions = []
if C_BACKEND:
extensions.append(
setup_zstd.get_c_extension(
support_legacy=SUPPORT_LEGACY,
system_zstd=SYSTEM_ZSTD,
warnings_as_errors=WARNINGS_AS_ERRORS,
)
)
if RUST_BACKEND:
extensions.append(setup_zstd.get_rust_extension())
if CFFI_BACKEND and cffi:
import make_cffi
extensions.append(make_cffi.ffi.distutils_extension())
version = None
with open("c-ext/python-zstandard.h", "r") as fh:
for line in fh:
if not line.startswith("#define PYTHON_ZSTANDARD_VERSION"):
continue
version = line.split()[2][1:-1]
break
if not version:
raise Exception(
"could not resolve package version; this should never happen"
)
setup(
name="zstandard",
version=version,
packages=["zstandard"],
package_data={"zstandard": ["__init__.pyi", "py.typed"]},
ext_modules=extensions,
cmdclass={"build_ext": setup_zstd.RustBuildExt},
test_suite="tests",
tests_require=["hypothesis"],
)
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