Preamble: open .pex file from its canonical path #292
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`argv[0]` might look like a relative path without actually existing relative to the current working directory - this is the case if (e.g.) the .pex file has been copied into a directory in `PATH` and the shell's `PATH` search behaviour is being relied upon to locate the .pex file. Get the canonical path to `argv[0]` before attempting to open it and read the preamble configuration within it.
toastwaffle
reviewed
Dec 4, 2025
kavya-chopra
approved these changes
Dec 4, 2025
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argv[0]might look like a relative path without actually existing relative to the current working directory - this is the case if (e.g.) the .pex file has been copied into a directory inPATHand the shell'sPATHsearch behaviour is being relied upon to locate the .pex file. Get the canonical path toargv[0]before attempting to open it and read the preamble configuration within it.