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import os
import pytest
from .files import build_files
from .textwrap import DALS
futures = pytest.importorskip('concurrent.futures')
importlib = pytest.importorskip('importlib')
class BuildBackendBase(object):
def __init__(self, cwd=None, env={}, backend_name='setuptools.build_meta'):
self.cwd = cwd
self.env = env
self.backend_name = backend_name
class BuildBackend(BuildBackendBase):
"""PEP 517 Build Backend"""
def __init__(self, *args, **kwargs):
super(BuildBackend, self).__init__(*args, **kwargs)
self.pool = futures.ProcessPoolExecutor()
def __getattr__(self, name):
"""Handles aribrary function invocations on the build backend."""
def method(*args, **kw):
root = os.path.abspath(self.cwd)
caller = BuildBackendCaller(root, self.env, self.backend_name)
return self.pool.submit(caller, name, *args, **kw).result()
return method
class BuildBackendCaller(BuildBackendBase):
def __call__(self, name, *args, **kw):
"""Handles aribrary function invocations on the build backend."""
os.chdir(self.cwd)
os.environ.update(self.env)
mod = importlib.import_module(self.backend_name)
return getattr(mod, name)(*args, **kw)
defns = [{
'setup.py': DALS("""
__import__('setuptools').setup(
name='foo',
py_modules=['hello'],
setup_requires=['six'],
)
"""),
'hello.py': DALS("""
def run():
print('hello')
"""),
},
{
'setup.py': DALS("""
assert __name__ == '__main__'
__import__('setuptools').setup(
name='foo',
py_modules=['hello'],
setup_requires=['six'],
)
"""),
'hello.py': DALS("""
def run():
print('hello')
"""),
},
{
'setup.py': DALS("""
variable = True
def function():
return variable
assert variable
__import__('setuptools').setup(
name='foo',
py_modules=['hello'],
setup_requires=['six'],
)
"""),
'hello.py': DALS("""
def run():
print('hello')
"""),
}]
@pytest.fixture(params=defns)
def build_backend(tmpdir, request):
build_files(request.param, prefix=str(tmpdir))
with tmpdir.as_cwd():
yield BuildBackend(cwd='.')
def test_get_requires_for_build_wheel(build_backend):
actual = build_backend.get_requires_for_build_wheel()
expected = ['six', 'setuptools', 'wheel']
assert sorted(actual) == sorted(expected)
def test_build_wheel(build_backend):
dist_dir = os.path.abspath('pip-wheel')
os.makedirs(dist_dir)
wheel_name = build_backend.build_wheel(dist_dir)
assert os.path.isfile(os.path.join(dist_dir, wheel_name))
def test_build_sdist(build_backend):
dist_dir = os.path.abspath('pip-sdist')
os.makedirs(dist_dir)
sdist_name = build_backend.build_sdist(dist_dir)
assert os.path.isfile(os.path.join(dist_dir, sdist_name))
def test_prepare_metadata_for_build_wheel(build_backend):
dist_dir = os.path.abspath('pip-dist-info')
os.makedirs(dist_dir)
dist_info = build_backend.prepare_metadata_for_build_wheel(dist_dir)
assert os.path.isfile(os.path.join(dist_dir, dist_info, 'METADATA'))
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