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