def activate(self):
"""Activate the virtual environment.
This actually restarts the pipless script using `os.execve()` to
replace itself with a subprocess that uses the correct python binary
from the venv/bin directory with the correct environment variables.
"""
if self.no_venv:
self._debug("no_venv was set, not activating")
return
new_environ = dict(os.environ)
new_environ["PATH"] = os.path.join(self.venv_home, "bin") + ":" + new_environ["PATH"]
new_environ["VIRTUAL_ENV"] = os.path.abspath(self.venv_home)
new_environ["_"] = os.path.join(self.venv_home, "bin", "python")
self._debug("replacing current process with new python in new env from venv")
self._debug("venv found at {!r}".format(self.venv_home))
venv_python_path = os.path.join(self.venv_home, "bin", "python")
new_args = [
venv_python_path,
"-m", "pipless",
"--no-venv",
# even though we say to not use the venv, this is still
# used to determine where to save the requirements.txt file
"--venv", self.venv_home
]
if self.debug:
new_args.append("--debug")
if self.quiet:
new_args.append("--quiet")
if self.no_requirements:
new_args.append("--no-requirements")
if self.venv_clear:
new_args.append("--clear")
if self._should_color():
new_args.append("--color")
if self.venv_system_site_packages:
new_args.append("--system-site-packages")
if self.venv_python is not None:
new_args.append("--python")
new_args.append(self.venv_python)
if self.python_opts.get("module", None) is not None:
new_args.append("-m")
new_args.append(self.python_opts.get("module"))
if self.python_opts.get("cmd", None) is not None:
new_args.append("-c")
new_args.append(self.python_opts.get("cmd"))
os.execve(
venv_python_path,
new_args + sys.argv,
new_environ
)
评论列表
文章目录
