uv/python/uv/__main__.py
Zanie Blue 5fe891082d
Discover and prefer the parent interpreter when invoked with python -m uv (#3736)
Closes #2222
Closes https://github.com/astral-sh/uv/issues/2058
Replaces https://github.com/astral-sh/uv/pull/2338
See also https://github.com/astral-sh/uv/issues/2649

We use an environment variable (`UV_INTERNAL__PARENT_INTERPRETER`) to
track the invoking interpreter when `python -m uv` is used. The parent
interpreter is preferred over all other sources (though it will be
skipped if it does not meet a `--python` request or if `--system` is
used and it belongs to a virtual environment). We warn if `--system` is
not provided and this interpreter would mutate system packages, but
allow it.
2024-05-22 11:34:24 -05:00

47 lines
1 KiB
Python

import os
import sys
from uv import find_uv_bin
def _detect_virtualenv() -> str:
"""
Find the virtual environment path for the current Python executable.
"""
# If it's already set, then just use it
value = os.getenv("VIRTUAL_ENV")
if value:
return value
# Otherwise, check if we're in a venv
venv_marker = os.path.join(sys.prefix, "pyvenv.cfg")
if os.path.exists(venv_marker):
return sys.prefix
return ""
def _run() -> None:
uv = os.fsdecode(find_uv_bin())
env = os.environ.copy()
venv = _detect_virtualenv()
if venv:
env.setdefault("VIRTUAL_ENV", venv)
# Let `uv` know that it was spawned by this Python interpreter
env["UV_INTERNAL__PARENT_INTERPRETER"] = sys.executable
if sys.platform == "win32":
import subprocess
completed_process = subprocess.run([uv, *sys.argv[1:]], env=env)
sys.exit(completed_process.returncode)
else:
os.execvpe(uv, [uv, *sys.argv[1:]], env=env)
if __name__ == "__main__":
_run()