def environment(self) -> Environment:
if self.is_global:
return GlobalEnvironment(self)
if self.config["use_venv"] and "VIRTUAL_ENV" in os.environ:
self.project_config["python.path"] = get_venv_python()
return GlobalEnvironment(self)
return Environment(self)
def python_executable(self) -> str:
"""Get the Python interpreter path."""
config = self.config
if self.project_config.get(
"python.path") and not os.getenv("PDM_IGNORE_SAVED_PYTHON"):
return self.project_config["python.path"]
path = None
if config["use_venv"]:
path = get_venv_python(self.root)
if path:
stream.echo(
f"Virtualenv interpreter {stream.green(path)} is detected.",
err=True,
verbosity=stream.DETAIL,
)
if not path and PYENV_INSTALLED and config.get("python.use_pyenv",
True):
path = Path(PYENV_ROOT, "shims", "python").as_posix()
if not path:
path = shutil.which("python")
version = None
if path:
try:
version, _ = get_python_version(path, True)
except (FileNotFoundError, subprocess.CalledProcessError):
version = None
if not version or not self.python_requires.contains(version):
finder = Finder()
for python in finder.find_all_python_versions():
version, _ = get_python_version(python.path.as_posix(), True)
if self.python_requires.contains(version):
path = python.path.as_posix()
break
else:
version = ".".join(map(str, sys.version_info[:3]))
if self.python_requires.contains(version):
path = sys.executable
if path:
if os.path.normcase(path) == os.path.normcase(sys.executable):
# Refer to the base interpreter to allow for venvs
path = getattr(sys, "_base_executable", sys.executable)
stream.echo(
"Using Python interpreter: {} ({})".format(
stream.green(path), version),
err=True,
)
if not os.getenv("PDM_IGNORE_SAVED_PYTHON"):
self.project_config["python.path"] = Path(path).as_posix()
return path
raise NoPythonVersion(
"No Python that satisfies {} is found on the system.".format(
self.python_requires))
def environment(self) -> Environment:
if self.is_global:
env = GlobalEnvironment(self)
# Rewrite global project's python requires to be
# compatible with the exact version
env.python_requires = PySpecSet(
"==" + get_python_version(env.python_executable, True))
return env
if self.config["use_venv"]:
venv_python = get_venv_python(self.root)
if venv_python:
self.project_config["python.path"] = venv_python
return GlobalEnvironment(self)
return Environment(self)
def environment(self) -> Environment:
if self.is_global:
env = GlobalEnvironment(self)
# Rewrite global project's python requires to be
# compatible with the exact version
env.python_requires = PySpecSet(
"==" + get_python_version(env.python_executable, True)[0])
return env
if not self.project_config.get(
"python.path") and self.config["use_venv"]:
venv_python = get_venv_python(self.root)
if venv_python:
self.project_config["python.path"] = venv_python
if (self.config["use_venv"] and self.project_config.get("python.path")
and Path(self.project_config.get("python.path")
).parent.parent.joinpath("pyvenv.cfg").exists()):
# Only recognize venv created by python -m venv and virtualenv>20
return GlobalEnvironment(self)
return Environment(self)
def python_executable(self) -> str:
"""Get the Python interpreter path."""
config = self.project.config
if config.get("python.path"):
return config["python.path"]
if PYENV_INSTALLED and config.get("python.use_pyenv", True):
return os.path.join(PYENV_ROOT, "shims", "python")
if "VIRTUAL_ENV" in os.environ:
stream.echo(
"An activated virtualenv is detected, reuse the interpreter now.",
err=True,
verbosity=stream.DETAIL,
)
return get_venv_python(self.project.root)
# First try what `python` refers to.
path = shutil.which("python")
version = None
if path:
version, _ = get_python_version(path, True)
if not version or not self.python_requires.contains(version):
finder = Finder()
for python in finder.find_all_python_versions():
version, _ = get_python_version(python.path.as_posix(), True)
if self.python_requires.contains(version):
path = python.path.as_posix()
break
else:
version = ".".join(map(str, sys.version_info[:3]))
if self.python_requires.contains(version):
path = sys.executable
if path:
stream.echo(
"Using Python interpreter: {} ({})".format(stream.green(path), version)
)
self.project.project_config["python.path"] = Path(path).as_posix()
return path
raise NoPythonVersion(
"No Python that satisfies {} is found on the system.".format(
self.python_requires
)
)