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"""
Utility functions for
- building and importing modules on test time, using a temporary location
- detecting if compilers are present
- determining paths to tests
"""
import glob
import os
import sys
import subprocess
import tempfile
import shutil
import atexit
import textwrap
import re
import pytest
import contextlib
import numpy
from pathlib import Path
from numpy.compat import asbytes, asstr
from numpy.testing import temppath, IS_WASM
from importlib import import_module
#
# Maintaining a temporary module directory
#
_module_dir = None
_module_num = 5403
if sys.platform == "cygwin":
NUMPY_INSTALL_ROOT = Path(__file__).parent.parent.parent
_module_list = list(NUMPY_INSTALL_ROOT.glob("**/*.dll"))
def _cleanup():
global _module_dir
if _module_dir is not None:
try:
sys.path.remove(_module_dir)
except ValueError:
pass
try:
shutil.rmtree(_module_dir)
except OSError:
pass
_module_dir = None
def get_module_dir():
global _module_dir
if _module_dir is None:
_module_dir = tempfile.mkdtemp()
atexit.register(_cleanup)
if _module_dir not in sys.path:
sys.path.insert(0, _module_dir)
return _module_dir
def get_temp_module_name():
# Assume single-threaded, and the module dir usable only by this thread
global _module_num
get_module_dir()
name = "_test_ext_module_%d" % _module_num
_module_num += 1
if name in sys.modules:
# this should not be possible, but check anyway
raise RuntimeError("Temporary module name already in use.")
return name
def _memoize(func):
memo = {}
def wrapper(*a, **kw):
key = repr((a, kw))
if key not in memo:
try:
memo[key] = func(*a, **kw)
except Exception as e:
memo[key] = e
raise
ret = memo[key]
if isinstance(ret, Exception):
raise ret
return ret
wrapper.__name__ = func.__name__
return wrapper
#
# Building modules
#
@_memoize
def build_module(source_files, options=[], skip=[], only=[], module_name=None):
"""
Compile and import a f2py module, built from the given files.
"""
code = f"import sys; sys.path = {sys.path!r}; import numpy.f2py; numpy.f2py.main()"
d = get_module_dir()
# Copy files
dst_sources = []
f2py_sources = []
for fn in source_files:
if not os.path.isfile(fn):
raise RuntimeError("%s is not a file" % fn)
dst = os.path.join(d, os.path.basename(fn))
shutil.copyfile(fn, dst)
dst_sources.append(dst)
base, ext = os.path.splitext(dst)
if ext in (".f90", ".f", ".c", ".pyf"):
f2py_sources.append(dst)
assert f2py_sources
# Prepare options
if module_name is None:
module_name = get_temp_module_name()
f2py_opts = ["-c", "-m", module_name] + options + f2py_sources
if skip:
f2py_opts += ["skip:"] + skip
if only:
f2py_opts += ["only:"] + only
# Build
cwd = os.getcwd()
try:
os.chdir(d)
cmd = [sys.executable, "-c", code] + f2py_opts
p = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
out, err = p.communicate()
if p.returncode != 0:
raise RuntimeError("Running f2py failed: %s\n%s" %
(cmd[4:], asstr(out)))
finally:
os.chdir(cwd)
# Partial cleanup
for fn in dst_sources:
os.unlink(fn)
# Rebase (Cygwin-only)
if sys.platform == "cygwin":
# If someone starts deleting modules after import, this will
# need to change to record how big each module is, rather than
# relying on rebase being able to find that from the files.
_module_list.extend(
glob.glob(os.path.join(d, "{:s}*".format(module_name)))
)
subprocess.check_call(
["/usr/bin/rebase", "--database", "--oblivious", "--verbose"]
+ _module_list
)
# Import
return import_module(module_name)
@_memoize
def build_code(source_code,
options=[],
skip=[],
only=[],
suffix=None,
module_name=None):
"""
Compile and import Fortran code using f2py.
"""
if suffix is None:
suffix = ".f"
with temppath(suffix=suffix) as path:
with open(path, "w") as f:
f.write(source_code)
return build_module([path],
options=options,
skip=skip,
only=only,
module_name=module_name)
#
# Check if compilers are available at all...
#
_compiler_status = None
def _get_compiler_status():
global _compiler_status
if _compiler_status is not None:
return _compiler_status
_compiler_status = (False, False, False)
if IS_WASM:
# Can't run compiler from inside WASM.
return _compiler_status
# XXX: this is really ugly. But I don't know how to invoke Distutils
# in a safer way...
code = textwrap.dedent(f"""\
import os
import sys
sys.path = {repr(sys.path)}
def configuration(parent_name='',top_path=None):
global config
from numpy.distutils.misc_util import Configuration
config = Configuration('', parent_name, top_path)
return config
from numpy.distutils.core import setup
setup(configuration=configuration)
config_cmd = config.get_config_cmd()
have_c = config_cmd.try_compile('void foo() {{}}')
print('COMPILERS:%%d,%%d,%%d' %% (have_c,
config.have_f77c(),
config.have_f90c()))
sys.exit(99)
""")
code = code % dict(syspath=repr(sys.path))
tmpdir = tempfile.mkdtemp()
try:
script = os.path.join(tmpdir, "setup.py")
with open(script, "w") as f:
f.write(code)
cmd = [sys.executable, "setup.py", "config"]
p = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
cwd=tmpdir)
out, err = p.communicate()
finally:
shutil.rmtree(tmpdir)
m = re.search(br"COMPILERS:(\d+),(\d+),(\d+)", out)
if m:
_compiler_status = (
bool(int(m.group(1))),
bool(int(m.group(2))),
bool(int(m.group(3))),
)
# Finished
return _compiler_status
def has_c_compiler():
return _get_compiler_status()[0]
def has_f77_compiler():
return _get_compiler_status()[1]
def has_f90_compiler():
return _get_compiler_status()[2]
#
# Building with distutils
#
@_memoize
def build_module_distutils(source_files, config_code, module_name, **kw):
"""
Build a module via distutils and import it.
"""
d = get_module_dir()
# Copy files
dst_sources = []
for fn in source_files:
if not os.path.isfile(fn):
raise RuntimeError("%s is not a file" % fn)
dst = os.path.join(d, os.path.basename(fn))
shutil.copyfile(fn, dst)
dst_sources.append(dst)
# Build script
config_code = textwrap.dedent(config_code).replace("\n", "\n ")
code = fr"""
import os
import sys
sys.path = {repr(sys.path)}
def configuration(parent_name='',top_path=None):
from numpy.distutils.misc_util import Configuration
config = Configuration('', parent_name, top_path)
{config_code}
return config
if __name__ == "__main__":
from numpy.distutils.core import setup
setup(configuration=configuration)
"""
script = os.path.join(d, get_temp_module_name() + ".py")
dst_sources.append(script)
with open(script, "wb") as f:
f.write(asbytes(code))
# Build
cwd = os.getcwd()
try:
os.chdir(d)
cmd = [sys.executable, script, "build_ext", "-i"]
p = subprocess.Popen(cmd,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
out, err = p.communicate()
if p.returncode != 0:
raise RuntimeError("Running distutils build failed: %s\n%s" %
(cmd[4:], asstr(out)))
finally:
os.chdir(cwd)
# Partial cleanup
for fn in dst_sources:
os.unlink(fn)
# Import
__import__(module_name)
return sys.modules[module_name]
#
# Unittest convenience
#
class F2PyTest:
code = None
sources = None
options = []
skip = []
only = []
suffix = ".f"
module = None
@property
def module_name(self):
cls = type(self)
return f'_{cls.__module__.rsplit(".",1)[-1]}_{cls.__name__}_ext_module'
def setup_method(self):
if sys.platform == "win32":
pytest.skip("Fails with MinGW64 Gfortran (Issue #9673)")
if self.module is not None:
return
# Check compiler availability first
if not has_c_compiler():
pytest.skip("No C compiler available")
codes = []
if self.sources:
codes.extend(self.sources)
if self.code is not None:
codes.append(self.suffix)
needs_f77 = False
needs_f90 = False
needs_pyf = False
for fn in codes:
if str(fn).endswith(".f"):
needs_f77 = True
elif str(fn).endswith(".f90"):
needs_f90 = True
elif str(fn).endswith(".pyf"):
needs_pyf = True
if needs_f77 and not has_f77_compiler():
pytest.skip("No Fortran 77 compiler available")
if needs_f90 and not has_f90_compiler():
pytest.skip("No Fortran 90 compiler available")
if needs_pyf and not (has_f90_compiler() or has_f77_compiler()):
pytest.skip("No Fortran compiler available")
# Build the module
if self.code is not None:
self.module = build_code(
self.code,
options=self.options,
skip=self.skip,
only=self.only,
suffix=self.suffix,
module_name=self.module_name,
)
if self.sources is not None:
self.module = build_module(
self.sources,
options=self.options,
skip=self.skip,
only=self.only,
module_name=self.module_name,
)
#
# Helper functions
#
def getpath(*a):
# Package root
d = Path(numpy.f2py.__file__).parent.resolve()
return d.joinpath(*a)
@contextlib.contextmanager
def switchdir(path):
curpath = Path.cwd()
os.chdir(path)
try:
yield
finally:
os.chdir(curpath)
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