Search PATH when .pex is invoked at a relative path with no /#299
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chrisnovakovic merged 2 commits intoplease-build:masterfrom Apr 10, 2026
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I've also written a regression test for this, but it won't pass until this PR gets merged and a new version of please_pex is released. |
toastwaffle
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Apr 9, 2026
In the preamble, mimic a shell's `PATH` searching behaviour when determining the path to the .pex file if it was invoked via a relative path name containing no `/` characters. Assuming the output of a hypothetical `python_binary` with the run-time interpreter search path `python3` has been copied to `/usr/bin/out.pex`, this will cause the Python interpreter to be invoked using the arguments on the right-hand side when the .pex file is invoked using the argument on the left-hand side: - `/abs/path/out.pex` -> `python3 /abs/path/out.pex` - `rel/path/out.pex` -> `python3 rel/path/out.pex` - `out.pex` -> `python3 /usr/bin/out.pex` Fixes please-build#298.
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In the preamble, mimic a shell's
PATHsearching behaviour when determining the path to the .pex file if it was invoked via a relative path name containing no/characters.Assuming the output of a hypothetical
python_binarywith the run-time interpreter search pathpython3has been copied to/usr/bin/out.pex, this will cause the Python interpreter to be invoked using the arguments on the right-hand side when the .pex file is invoked using the argument on the left-hand side:/abs/path/out.pex->python3 /abs/path/out.pexrel/path/out.pex->python3 rel/path/out.pexout.pex->python3 /usr/bin/out.pexFixes #298.