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## Summary This PR improves our "don't fully resolve symlinks" behavior for `python-build-standalone` builds based on learnings from https://github.com/indygreg/python-build-standalone/issues/380#issuecomment-2526575235. Specifically, we can now robustly detect whether a target executable will lead to a valid `prefix` or not, and iteratively resolve symlinks until we find a valid target executable. ## Test Plan ### Direct symlink to `python` Correctly resolves to the symlink target, rather than the symlink itself. ``` ❯ ln -s /Users/crmarsh/.local/share/uv/python/cpython-3.12.6-macos-aarch64-none/bin/python foo ❯ cargo run venv --python ./foo ❯ cat .venv/pyvenv.cfg home = /Users/crmarsh/.local/share/uv/python/cpython-3.12.6-macos-aarch64-none/bin implementation = CPython uv = 0.5.7 version_info = 3.12.6 include-system-site-packages = false prompt = uv ❯ .venv/bin/python -c "import sys" ``` ### Symlink to the Python installation Correctly does _not_ resolve the symlink. ``` ❯ ln -s /Users/crmarsh/.local/share/uv/python/cpython-3.12.6-macos-aarch64-none bar ❯ cargo run venv --python ./bar ❯ cat .venv/pyvenv.cfg home = /Users/crmarsh/workspace/uv/bar/bin implementation = CPython uv = 0.5.7 version_info = 3.12.6 include-system-site-packages = false prompt = uv ❯ .venv/bin/python -c "import sys" ``` ### Direct symlink to `python` in a symlinked Python installation Correctly resolves the direct symlink, but not the symlink of the Python installation. ``` ❯ ln -s bar/bin/python baz ❯ cargo run venv --python ./baz ❯ cat .venv/pyvenv.cfg home = /Users/crmarsh/workspace/uv/bar/bin implementation = CPython uv = 0.5.7 version_info = 3.12.6 include-system-site-packages = false prompt = uv ❯ .venv/bin/python -c "import sys" ``` |
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uv-virtualenv
uv-virtualenv is a rust library to create Python virtual environments. It also has a CLI.