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this looks good to me. it needs a ruff format pass, and so far we didn't have unittests for the tooling in this repo, so this would be the first one. since the intent is that all of this is temporary, I'm not sure if we want unittests, but I also don't object (I like tests), so I'd want @brettcannon's input on that. |
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patch_path()currently pads a replacement prefix with NUL bytes before the rest of the path. ReplacingPLACEHOLDER/lib/python3.16therefore leaves C string readers seeing only the installation prefix, without/lib/python3.16.Replace placeholders within each binary string, then pad its end. This preserves the path suffix and the original byte length, including when the same string contains multiple placeholders.
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.pycand.pyofiles because their marshalled strings are length-prefixed. Applying raw binary prefix replacement to them can insert NUL bytes into storedco_filenamevalues.