def run_python_in_env(srcdir, args, **kwargs):
"""
Execute ``python <args>`` in path in the build environment.
The build environment will be read from the ``srcdir/pyproject.toml`` file.
Notes
-----
The ``cwd`` keyword argument to `subprocess.call` will default to
``srcdir`` unless passed in ``kwargs``.
The output from the pip command installing the build dependencies is
redirected to stderr.
"""
srcdir = Path(srcdir).expanduser().absolute()
builder = ProjectBuilder(srcdir)
cwd = kwargs.pop("cwd", srcdir)
with IsolatedEnvBuilder() as env:
builder.python_executable = env.executable
silent_install(env, builder.build_system_requires)
requirements = builder.get_requires_for_build('sdist')
silent_install(env, requirements)
sub_args = [builder.python_executable] + list(args)
return subprocess.call(sub_args, cwd=cwd, **kwargs)
def _build_in_isolated_env(
build_env: Mapping[str, str],
builder: ProjectBuilder,
outdir: str,
distribution: str,
) -> str:
# For debugging: The following line disables removal of the isolated venv.
# It will be left in the /tmp folder and can be inspected or entered as
# needed.
# _IsolatedEnvBuilder.__exit__ = lambda *args: None
with _IsolatedEnvBuilder() as env:
builder.python_executable = env.executable
builder.scripts_dir = env.scripts_dir
# first install the build dependencies
symlink_unisolated_packages(env)
install_reqs(env, builder.build_system_requires)
installed_requires_for_build = False
try:
build_reqs = builder.get_requires_for_build(distribution)
except BuildBackendException:
pass
else:
install_reqs(env, build_reqs)
installed_requires_for_build = True
with replace_env(build_env):
if not installed_requires_for_build:
install_reqs(env, builder.get_requires_for_build(distribution))
return builder.build(distribution, outdir, {})
def _build_in_isolated_env(
build_env: Mapping[str, str],
builder: ProjectBuilder,
outdir: str,
distribution: str,
) -> str:
with _IsolatedEnvBuilder() as env:
builder.python_executable = env.executable
builder.scripts_dir = env.scripts_dir
# first install the build dependencies
symlink_unisolated_packages(env)
install_reqs(env, builder.build_system_requires)
installed_requires_for_build = False
try:
build_reqs = builder.get_requires_for_build(distribution)
except BuildBackendException:
pass
else:
install_reqs(env, build_reqs)
installed_requires_for_build = True
with replace_env(build_env):
if not installed_requires_for_build:
install_reqs(env, builder.get_requires_for_build(distribution))
return builder.build(distribution, outdir, {})
def _build_in_isolated_env(
builder: ProjectBuilder, outdir: PathType, distribution: str, config_settings: Optional[ConfigSettingsType]
) -> str:
with _IsolatedEnvBuilder() as env:
builder.python_executable = env.executable
builder.scripts_dir = env.scripts_dir
# first install the build dependencies
env.install(builder.build_system_requires)
# then get the extra required dependencies from the backend (which was installed in the call above :P)
env.install(builder.get_requires_for_build(distribution))
return builder.build(distribution, outdir, config_settings or {})