443 lines
12 KiB
Python
443 lines
12 KiB
Python
"""
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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 atexit
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import concurrent.futures
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import contextlib
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import glob
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import os
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import shutil
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import subprocess
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import sys
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import tempfile
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from importlib import import_module
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from pathlib import Path
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import pytest
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import numpy
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from numpy._utils import asunicode
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from numpy.f2py._backends._meson import MesonBackend
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from numpy.testing import IS_WASM, temppath
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#
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# Check if compilers are available at all...
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#
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def check_language(lang, code_snippet=None):
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if sys.platform == "win32":
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pytest.skip("No Fortran tests on Windows (Issue #25134)", allow_module_level=True)
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tmpdir = tempfile.mkdtemp()
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try:
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meson_file = os.path.join(tmpdir, "meson.build")
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with open(meson_file, "w") as f:
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f.write("project('check_compilers')\n")
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f.write(f"add_languages('{lang}')\n")
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if code_snippet:
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f.write(f"{lang}_compiler = meson.get_compiler('{lang}')\n")
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f.write(f"{lang}_code = '''{code_snippet}'''\n")
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f.write(
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f"_have_{lang}_feature ="
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f"{lang}_compiler.compiles({lang}_code,"
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f" name: '{lang} feature check')\n"
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)
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try:
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runmeson = subprocess.run(
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["meson", "setup", "btmp"],
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check=False,
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cwd=tmpdir,
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capture_output=True,
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)
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except subprocess.CalledProcessError:
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pytest.skip("meson not present, skipping compiler dependent test", allow_module_level=True)
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return runmeson.returncode == 0
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finally:
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shutil.rmtree(tmpdir)
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fortran77_code = '''
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C Example Fortran 77 code
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PROGRAM HELLO
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PRINT *, 'Hello, Fortran 77!'
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END
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'''
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fortran90_code = '''
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! Example Fortran 90 code
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program hello90
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type :: greeting
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character(len=20) :: text
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end type greeting
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type(greeting) :: greet
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greet%text = 'hello, fortran 90!'
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print *, greet%text
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end program hello90
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'''
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# Dummy class for caching relevant checks
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class CompilerChecker:
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def __init__(self):
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self.compilers_checked = False
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self.has_c = False
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self.has_f77 = False
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self.has_f90 = False
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def check_compilers(self):
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if (not self.compilers_checked) and (not sys.platform == "cygwin"):
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with concurrent.futures.ThreadPoolExecutor() as executor:
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futures = [
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executor.submit(check_language, "c"),
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executor.submit(check_language, "fortran", fortran77_code),
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executor.submit(check_language, "fortran", fortran90_code)
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]
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self.has_c = futures[0].result()
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self.has_f77 = futures[1].result()
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self.has_f90 = futures[2].result()
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self.compilers_checked = True
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if not IS_WASM:
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checker = CompilerChecker()
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checker.check_compilers()
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def has_c_compiler():
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return checker.has_c
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def has_f77_compiler():
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return checker.has_f77
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def has_f90_compiler():
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return checker.has_f90
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def has_fortran_compiler():
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return (checker.has_f90 and checker.has_f77)
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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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if sys.platform == "cygwin":
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NUMPY_INSTALL_ROOT = Path(__file__).parent.parent.parent
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_module_list = list(NUMPY_INSTALL_ROOT.glob("**/*.dll"))
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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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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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# gh-27045 : Skip if no compilers are found
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if not has_fortran_compiler():
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pytest.skip("No Fortran compiler available")
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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(f"{fn} is not a file")
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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", ".f95", ".f", ".c", ".pyf"):
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f2py_sources.append(dst)
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assert f2py_sources
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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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gil_options = []
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if '--freethreading-compatible' not in options and '--no-freethreading-compatible' not in options:
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# default to disabling the GIL if unset in options
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gil_options = ['--freethreading-compatible']
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f2py_opts = ["-c", "-m", module_name] + options + gil_options + f2py_sources
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f2py_opts += ["--backend", "meson"]
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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(f"Running f2py failed: {cmd[4:]}\n{asunicode(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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# Rebase (Cygwin-only)
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if sys.platform == "cygwin":
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# If someone starts deleting modules after import, this will
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# need to change to record how big each module is, rather than
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# relying on rebase being able to find that from the files.
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_module_list.extend(
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glob.glob(os.path.join(d, f"{module_name:s}*"))
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)
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subprocess.check_call(
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["/usr/bin/rebase", "--database", "--oblivious", "--verbose"]
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+ _module_list
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)
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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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# Building with meson
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#
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class SimplifiedMesonBackend(MesonBackend):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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def compile(self):
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self.write_meson_build(self.build_dir)
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self.run_meson(self.build_dir)
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def build_meson(source_files, module_name=None, **kwargs):
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"""
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Build a module via Meson and import it.
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"""
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# gh-27045 : Skip if no compilers are found
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if not has_fortran_compiler():
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pytest.skip("No Fortran compiler available")
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build_dir = get_module_dir()
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if module_name is None:
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module_name = get_temp_module_name()
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# Initialize the MesonBackend
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backend = SimplifiedMesonBackend(
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modulename=module_name,
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sources=source_files,
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extra_objects=kwargs.get("extra_objects", []),
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build_dir=build_dir,
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include_dirs=kwargs.get("include_dirs", []),
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library_dirs=kwargs.get("library_dirs", []),
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libraries=kwargs.get("libraries", []),
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define_macros=kwargs.get("define_macros", []),
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undef_macros=kwargs.get("undef_macros", []),
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f2py_flags=kwargs.get("f2py_flags", []),
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sysinfo_flags=kwargs.get("sysinfo_flags", []),
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fc_flags=kwargs.get("fc_flags", []),
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flib_flags=kwargs.get("flib_flags", []),
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setup_flags=kwargs.get("setup_flags", []),
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remove_build_dir=kwargs.get("remove_build_dir", False),
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extra_dat=kwargs.get("extra_dat", {}),
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)
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backend.compile()
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# Import the compiled module
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sys.path.insert(0, f"{build_dir}/{backend.meson_build_dir}")
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return import_module(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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_has_c_compiler = None
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_has_f77_compiler = None
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_has_f90_compiler = None
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@property
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def module_name(self):
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cls = type(self)
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return f'_{cls.__module__.rsplit(".", 1)[-1]}_{cls.__name__}_ext_module'
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@classmethod
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def setup_class(cls):
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if sys.platform == "win32":
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pytest.skip("Fails with MinGW64 Gfortran (Issue #9673)")
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F2PyTest._has_c_compiler = has_c_compiler()
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F2PyTest._has_f77_compiler = has_f77_compiler()
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F2PyTest._has_f90_compiler = has_f90_compiler()
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F2PyTest._has_fortran_compiler = has_fortran_compiler()
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def setup_method(self):
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if self.module is not None:
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return
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codes = self.sources or []
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if self.code:
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codes.append(self.suffix)
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needs_f77 = any(str(fn).endswith(".f") for fn in codes)
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needs_f90 = any(str(fn).endswith(".f90") for fn in codes)
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needs_pyf = any(str(fn).endswith(".pyf") for fn in codes)
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if needs_f77 and not self._has_f77_compiler:
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pytest.skip("No Fortran 77 compiler available")
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if needs_f90 and not self._has_f90_compiler:
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pytest.skip("No Fortran 90 compiler available")
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if needs_pyf and not self._has_fortran_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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