forked from scipy/scipy
/
openblas_support.py
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/
openblas_support.py
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import os
import sys
import glob
import shutil
import textwrap
import platform
from tempfile import mkstemp, gettempdir
from urllib.request import urlopen, Request
from urllib.error import HTTPError
import zipfile
import tarfile
OPENBLAS_V = 'v0.3.8'
OPENBLAS_LONG = 'v0.3.5-605-gc815b8fb' # the 0.3.5 is misleading
BASE_LOC = ''
ANACONDA = 'https://anaconda.org/multibuild-wheels-staging/openblas-libs'
ARCHITECTURES = ['', 'windows', 'darwin', 'aarch64', 'x86', 'ppc64le', 's390x']
IS_32BIT = sys.maxsize < 2**32
def get_arch():
if platform.system() == 'Windows':
ret = 'windows'
elif platform.system() == 'Darwin':
ret = 'darwin'
else:
ret = platform.uname().machine
# What do 32 bit machines report?
# If they are a docker, they report x86_64 or i686
if 'x86' in ret or ret == 'i686':
ret = 'x86'
assert ret in ARCHITECTURES
return ret
def get_ilp64():
if os.environ.get("NPY_USE_BLAS_ILP64", "0") == "0":
return None
if IS_32BIT:
raise RuntimeError("NPY_USE_BLAS_ILP64 set on 32-bit arch")
return "64_"
def download_openblas(target, arch, ilp64):
fnsuffix = {None: "", "64_": "64_"}[ilp64]
filename = ''
if arch in ('aarch64', 'ppc64le', 's390x'):
suffix = f'manylinux2014_{arch}.tar.gz'
filename = f'{ANACONDA}/{OPENBLAS_LONG}/download/openblas{fnsuffix}-{OPENBLAS_LONG}-{suffix}'
typ = 'tar.gz'
typ = 'tar.gz'
elif arch == 'darwin':
suffix = 'macosx_10_9_x86_64-gf_1becaaa.tar.gz'
filename = f'{ANACONDA}/{OPENBLAS_LONG}/download/openblas{fnsuffix}-{OPENBLAS_LONG}-{suffix}'
typ = 'tar.gz'
elif arch == 'windows':
if IS_32BIT:
suffix = 'win32-gcc_7_1_0.zip'
else:
suffix = 'win_amd64-gcc_7_1_0.zip'
filename = f'{ANACONDA}/{OPENBLAS_LONG}/download/openblas{fnsuffix}-{OPENBLAS_LONG}-{suffix}'
typ = 'zip'
elif 'x86' in arch:
if IS_32BIT:
suffix = 'manylinux1_i686.tar.gz'
else:
suffix = 'manylinux1_x86_64.tar.gz'
filename = f'{ANACONDA}/{OPENBLAS_LONG}/download/openblas{fnsuffix}-{OPENBLAS_LONG}-{suffix}'
typ = 'tar.gz'
if not filename:
return None
print("Downloading:", filename, file=sys.stderr)
try:
with open(target, 'wb') as fid:
# anaconda.org download location guards against
# scraping so trick it with a fake browser header
# see: https://medium.com/@speedforcerun/python-crawler-http-error-403-forbidden-1623ae9ba0f
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.3'}
req = Request(url=filename, headers=headers)
fid.write(urlopen(req).read())
except HTTPError as e:
print(f'Could not download "{filename}"')
print(f'Error message: {e}')
return None
return typ
def setup_openblas(arch=get_arch(), ilp64=get_ilp64()):
'''
Download and setup an openblas library for building. If successful,
the configuration script will find it automatically.
Returns
-------
msg : str
path to extracted files on success, otherwise indicates what went wrong
To determine success, do ``os.path.exists(msg)``
'''
_, tmp = mkstemp()
if not arch:
raise ValueError('unknown architecture')
typ = download_openblas(tmp, arch, ilp64)
if not typ:
return ''
if arch == 'windows':
if not typ == 'zip':
return 'expecting to download zipfile on windows, not %s' % str(typ)
return unpack_windows_zip(tmp)
else:
if not typ == 'tar.gz':
return 'expecting to download tar.gz, not %s' % str(typ)
return unpack_targz(tmp)
def unpack_windows_zip(fname):
with zipfile.ZipFile(fname, 'r') as zf:
# Get the openblas.a file, but not openblas.dll.a nor openblas.dev.a
lib = [x for x in zf.namelist() if OPENBLAS_LONG in x and
x.endswith('a') and not x.endswith('dll.a') and
not x.endswith('dev.a')]
if not lib:
return 'could not find libopenblas_%s*.a ' \
'in downloaded zipfile' % OPENBLAS_LONG
target = os.path.join(gettempdir(), 'openblas.a')
with open(target, 'wb') as fid:
fid.write(zf.read(lib[0]))
return target
def unpack_targz(fname):
target = os.path.join(gettempdir(), 'openblas')
if not os.path.exists(target):
os.mkdir(target)
with tarfile.open(fname, 'r') as zf:
# Strip common prefix from paths when unpacking
prefix = os.path.commonpath(zf.getnames())
extract_tarfile_to(zf, target, prefix)
return target
def extract_tarfile_to(tarfileobj, target_path, archive_path):
"""Extract TarFile contents under archive_path/ to target_path/"""
target_path = os.path.abspath(target_path)
def get_members():
for member in tarfileobj.getmembers():
if archive_path:
norm_path = os.path.normpath(member.name)
if norm_path.startswith(archive_path + os.path.sep):
member.name = norm_path[len(archive_path)+1:]
else:
continue
dst_path = os.path.abspath(os.path.join(target_path, member.name))
if os.path.commonpath([target_path, dst_path]) != target_path:
# Path not under target_path, probably contains ../
continue
yield member
tarfileobj.extractall(target_path, members=get_members())
def make_init(dirname):
'''
Create a _distributor_init.py file for OpenBlas
'''
with open(os.path.join(dirname, '_distributor_init.py'), 'wt') as fid:
fid.write(textwrap.dedent("""
'''
Helper to preload windows dlls to prevent dll not found errors.
Once a DLL is preloaded, its namespace is made available to any
subsequent DLL. This file originated in the numpy-wheels repo,
and is created as part of the scripts that build the wheel.
'''
import os
from ctypes import WinDLL
import glob
if os.name == 'nt':
# convention for storing / loading the DLL from
# numpy/.libs/, if present
try:
basedir = os.path.dirname(__file__)
except:
pass
else:
libs_dir = os.path.abspath(os.path.join(basedir, '.libs'))
DLL_filenames = []
if os.path.isdir(libs_dir):
for filename in glob.glob(os.path.join(libs_dir,
'*openblas*dll')):
# NOTE: would it change behavior to load ALL
# DLLs at this path vs. the name restriction?
WinDLL(os.path.abspath(filename))
DLL_filenames.append(filename)
if len(DLL_filenames) > 1:
import warnings
warnings.warn("loaded more than 1 DLL from .libs:\\n%s" %
"\\n".join(DLL_filenames),
stacklevel=1)
"""))
def test_setup(arches):
'''
Make sure all the downloadable files exist and can be opened
'''
def items():
for arch in arches:
yield arch, None
if arch in ('x86', 'darwin', 'windows'):
yield arch, '64_'
for arch, ilp64 in items():
if arch == '':
continue
target = None
try:
try:
target = setup_openblas(arch, ilp64)
except:
print(f'Could not setup {arch}')
raise
if not target:
raise RuntimeError(f'Could not setup {arch}')
print(target)
if arch == 'windows':
if not target.endswith('.a'):
raise RuntimeError("Not .a extracted!")
else:
files = glob.glob(os.path.join(target, "lib", "*.a"))
if not files:
raise RuntimeError("No lib/*.a unpacked!")
finally:
if target is not None:
if os.path.isfile(target):
os.unlink(target)
else:
shutil.rmtree(target)
def test_version(expected_version, ilp64=get_ilp64()):
"""
Assert that expected OpenBLAS version is
actually available via SciPy
"""
import scipy
import scipy.linalg
import ctypes
dll = ctypes.CDLL(scipy.linalg.cython_blas.__file__)
if ilp64 == "64_":
get_config = dll.openblas_get_config64_
else:
get_config = dll.openblas_get_config
get_config.restype=ctypes.c_char_p
res = get_config()
print('OpenBLAS get_config returned', str(res))
check_str = b'OpenBLAS %s' % expected_version[0].encode()
assert check_str in res
if 'dev' not in expected_version[0]:
assert b'dev' not in res
if ilp64:
assert b"USE64BITINT" in res
else:
assert b"USE64BITINT" not in res
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser(
description='Download and expand an OpenBLAS archive for this ' \
'architecture')
parser.add_argument('--test', nargs='*', default=None,
help='Test different architectures. "all", or any of %s' % ARCHITECTURES)
parser.add_argument('--check_version', nargs=1, default=None,
help='Check provided OpenBLAS version string against available OpenBLAS')
args = parser.parse_args()
if args.check_version is not None:
test_version(args.check_version)
elif args.test is None:
print(setup_openblas())
else:
if len(args.test) == 0 or 'all' in args.test:
test_setup(ARCHITECTURES)
else:
test_setup(args.test)