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from __future__ import division, absolute_import, print_function
import os
import sys
import textwrap
import platform
try:
from urllib.request import urlopen
from urllib.error import HTTPError
except:
#Python2
from urllib2 import urlopen, HTTPError
from tempfile import mkstemp, gettempdir
import zipfile
import tarfile
OPENBLAS_V = 'v0.3.7'
OPENBLAS_LONG = 'v0.3.7'
BASE_LOC = ''
RACKSPACE = 'https://3f23b170c54c2533c070-1c8a9b3114517dc5fe17b7c3f8c63a43.ssl.cf2.rackcdn.com'
ARCHITECTURES = ['', 'windows', 'darwin', 'arm', 'x86', 'ppc64']
IS_32BIT = sys.maxsize < 2**32
def get_arch():
if platform.system() == 'Windows':
ret = 'windows'
elif platform.system() == 'Darwin':
ret = 'darwin'
# Python3 returns a named tuple, but Python2 does not, so we are stuck
elif 'arm' in os.uname()[-1]:
ret = 'arm';
elif 'aarch64' in os.uname()[-1]:
ret = 'arm';
elif 'x86' in os.uname()[-1]:
ret = 'x86'
elif 'ppc64' in os.uname()[-1]:
ret = 'ppc64'
else:
ret = ''
assert ret in ARCHITECTURES
return ret
def download_openblas(target, arch):
filename = ''
if arch == 'arm':
# ARMv8 OpenBLAS built using script available here:
# https://github.com/tylerjereddy/openblas-static-gcc/tree/master/ARMv8
# build done on GCC compile farm machine named gcc115
# tarball uploaded manually to an unshared Dropbox location
filename = ('https://www.dropbox.com/s/vdeckao4omss187/'
'openblas-{}-armv8.tar.gz?dl=1'.format(OPENBLAS_V))
typ = 'tar.gz'
elif arch == 'ppc64':
# build script for POWER8 OpenBLAS available here:
# https://github.com/tylerjereddy/openblas-static-gcc/blob/master/power8
# built on GCC compile farm machine named gcc112
# manually uploaded tarball to an unshared Dropbox location
filename = ('https://www.dropbox.com/s/yt0d2j86x1j8nh1/'
'openblas-{}-ppc64le-power8.tar.gz?dl=1'.format(OPENBLAS_V))
typ = 'tar.gz'
elif arch == 'darwin':
filename = '{0}/openblas-{1}-macosx_10_9_x86_64-gf_1becaaa.tar.gz'.format(
RACKSPACE, OPENBLAS_LONG)
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 = '{0}/openblas-{1}-{2}'.format(RACKSPACE, OPENBLAS_LONG, suffix)
typ = 'zip'
elif arch == 'x86':
if IS_32BIT:
suffix = 'manylinux1_i686.tar.gz'
else:
suffix = 'manylinux1_x86_64.tar.gz'
filename = '{0}/openblas-{1}-{2}'.format(RACKSPACE, OPENBLAS_LONG, suffix)
typ = 'tar.gz'
if not filename:
return None
try:
with open(target, 'wb') as fid:
fid.write(urlopen(filename).read())
except HTTPError:
print('Could not download "%s"' % filename)
return None
return typ
def setup_openblas(arch=get_arch()):
'''
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)
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):
import sysconfig
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:
# TODO: check that all the zf.getnames() files do not escape the
# extract directory (no leading '../', '/')
zf.extractall(target)
return target
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
'''
for arch in arches:
if arch == '':
continue
try:
target = setup_openblas(arch)
except:
print('Could not setup %s' % arch)
raise
if not target:
raise RuntimeError('Could not setup %s' % arch)
print(target)
def test_version(expected_version):
"""
Assert that expected OpenBLAS version is
actually available via NumPy
"""
import numpy
import ctypes
dll = ctypes.CDLL(numpy.core._multiarray_umath.__file__)
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 __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)
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